TWM622662U - Bike hub capable of adjusting bearing pressure angle spacing - Google Patents

Abstract

The utility model relates to a bicycle hub which can adjust the bearing pressure angular clearance, which comprises a shell, a mandrel, two bearings and an adjustment piece. The casing includes a ring wall, and a first limiting portion and a second limiting portion disposed on the inner peripheral surface of the ring wall along an axial direction. The mandrel includes a joint portion and a stop portion. The bearings are sleeved with the mandrel along the axial direction, and the adjustment element is sleeved with the engaging portion and can cooperate with the stop portion, the first limiting portion, and the second limiting portion to push the bearings, Move the respective inner ring of each bearing to a preload position relative to the respective outer ring, and define two preload contact points, a preload connection line passing through the preload contact points and a line perpendicular to the axis. A radial line defines a pressure angle between 26 degrees and 28 degrees. By defining the preload pressure angles, the stability of the bicycle during cornering and rolling is improved.

Description

Bicycle hub with adjustable bearing pressure angular clearance

The new model relates to a bicycle hub, in particular to a bicycle hub which can adjust the bearing pressure angle clearance.

Referring to FIG. 1 , an existing bicycle hub 9 such as the Republic of China Patent No. M476059 includes a shell body 91 , a rotating shaft 92 , a second bearing 93 , and an adjusting member 94 .

The housing body 91 has a ring wall 911 surrounding a central axis C, and a first protrusion 912 and a second protrusion 913 protruding from the inner peripheral surface of the ring wall 911 . The rotating shaft 92 has a shaft body 921 surrounding the central axis C and located in the ring wall 911 , a blocking portion 922 protruding from the outer peripheral surface of the shaft body 921 , and an external thread segment located on one side of the shaft body 921 923. Each bearing 93 has an inner wall 931 surrounding the shaft 921 , an outer wall 932 surrounding the inner wall 931 , and a plurality of balls 933 disposed between the inner wall 931 and the outer wall 932 . The adjusting member 94 is annular and can be screwed to the external thread section 923 .

When the balls 933 of each bearing 93 and the respective inner wall 931 and the respective outer wall 932 cause a gap between the balls 933 and the inner wall 931 and the outer wall 932 due to long-term friction , the casing body 91 cannot rotate relative to the rotating shaft 92 smoothly. At this time, by rotating the adjusting member 94, the adjusting member 94 and the blocking portion 922 can press the inner walls 931 of the bearing 93 respectively to move the inner walls 931 toward each other, and make each An inner wall 931 and the respective outer wall 932 are slightly displaced, so that the balls 933 of each bearing 93 re-contact the respective inner wall 931 and the outer wall 932, so that the shell body 91 can continue to maintain Steady rotation.

However, when the bearing 93 is initially installed on the rotating shaft 92 , the balls 933 of each bearing 93 fit the respective inner wall 931 and the outer wall 932 , so the bearing 93 cannot be adjusted in advance The relative positional relationship between the equal balls 933 and the inner wall 931 and the outer wall 932 makes any of the inner walls 931 and the respective outer walls 932 misaligned.

Therefore, the purpose of this new model is to provide a bicycle hub with adjustable bearing pressure angle clearance which can improve the above shortcomings.

Therefore, the new bicycle hub with adjustable bearing pressure angular clearance includes a shell, a mandrel, two bearings, and an adjustment piece.

The housing includes a ring wall defining a perforation around an axis, and a limiting member protruding from the inner peripheral surface of the ring wall, the limiting member having oppositely disposed along an axial direction parallel to the axis A first limiting portion and a second limiting portion.

The mandrel includes a shaft body through the through hole, a joint portion connected to the shaft body along the axial direction and located on the side of the first limiting portion opposite to the second limiting portion, and a protruding portion on the side of the first limiting portion. A stop portion on the outer peripheral surface of the shaft body and along the axial direction is located on the side of the second limiting portion opposite to the first limiting portion.

The bearings are spaced between the ring wall of the housing and the shaft body along the axial direction, and each bearing includes an inner ring abutting against and surrounding the shaft body, and an inner ring surrounding the inner ring and abutting against the ring wall The outer ring, and a plurality of balls arranged between the inner ring and the outer ring, each inner ring has a first annular surface that surrounds the axis in the shape of a ring groove, and each outer ring has a ring groove that surrounds the axis The axis also cooperates with the respective first annular surfaces to sandwich the second annular surfaces of the respective balls, and defines each bearing extending from one side to the other side of the respective first annular surfaces along the axial direction. The radius of curvature of the curve is a first radius of curvature, and the radius of curvature of the curve that defines each bearing extending from one side to the other side of the respective second annular surface along the axial direction is a second radius of curvature, the first The radius of curvature is equal to the second radius of curvature and greater than the radius of each ball, one of the bearings is located between the first limit portion and the joint portion along the axial direction, and the outer ring abuts against the first limit a position part, the other one of the bearings is located between the stop part and the second stop part along the axial direction, the outer ring abuts against the second stop part, and the inner ring abuts against the stop part Department.

The adjusting piece is sleeved with the engaging portion and can cooperate with the blocking portion, the first limiting portion, and the second limiting portion to push the inner rings of the bearings, so that the inner rings move toward each other. The inner ring moves to a preload position along the axial direction relative to the respective outer ring. In the preload position, each inner ring is displaced relative to the respective outer ring along the axial direction, and each ball is connected to the respective inner ring. The ring and the respective outer ring define two pre-compression contact points, a pre-compression connection line passing through the pre-compression contact points and a radial line perpendicular to the axis, the connection line and the radial line defining A pressure angle between 26 degrees and 28 degrees.

The utility model has the following functions: the inner ring and the outer ring of each bearing can be pre-adjusted to be misaligned and the pre-compression pressure angle can be defined, so as to improve the stability of the bicycle when cornering and rolling. When a gap occurs between the balls of one of the bearings and the respective inner ring or the outer ring due to wear, the adjusting member can be adjusted to make the balls re-contact with the respective inner ring and the outer ring, so that the shell The body rotates smoothly relative to the spindle.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. Before the present invention is described in detail, attention should be paid to the relative position terms used in the following description, for example, "front", "rear", "left", "Right", "Up" and "Down" are based on the orientation shown in each figure and the orientation in normal use.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated by the same reference numerals.

Referring to Figure 2, Figure 3 and Figure 4, a first embodiment of the new bicycle hub with adjustable bearing pressure angular clearance includes a shell 1, a ratchet seat 2, a spindle 3, two bearings 4, an adjustment 5, and one end cap 6.

The housing 1 includes an annular wall 11 defining a through hole 12 around an axis L1, and a limiting member 13 protruding from an inner peripheral surface 111 of the annular wall 11, the limiting member 13 having a parallel A first limiting portion 131 and a second limiting portion 132 are disposed opposite to an axial direction X of the axis L1. In this embodiment, the limiting member 13 is annular and protrudes from the inner peripheral surface 111 of the ring wall 11 . In other variations of this embodiment, the first limiting portion 131 and the second limiting portion The portions 132 can also be respectively annular and respectively protrude on the inner peripheral surface 111 of the annular wall 11 , which should not be limited thereto.

The ratchet seat 2 is locked on the side of the housing 1 adjacent to the second limiting portion 132 along the axial direction X.

The mandrel 3 includes a shaft body 31 pierced through the through hole 12 , a shaft body 31 connected to the shaft body 31 along the axial direction X and located on the side of the first limiting portion 131 opposite to the second limiting portion 132 and having a The engaging portion 32 of the external thread surface 321, a driving portion 33 connected to the side of the shaft body 31 opposite to the engaging portion 32 along the axial direction X and passing through the ratchet seat 2, and a driving portion 33 protruding from the shaft body 31 The outer peripheral surface and along the axial direction X are located at the blocking portion 34 on the side of the second limiting portion 132 opposite to the first limiting portion 131 .

Referring to FIGS. 3 , 4 and 5 , the bearings 4 are disposed between the annular wall 11 of the housing 1 and the shaft body 31 at intervals along the axial direction X, and each bearing 4 includes a bearing that abuts against and surrounds the shaft The inner ring 41 of the main body 31 , an outer ring 42 surrounding the inner ring 41 and abutting against the inner peripheral surface 111 of the ring wall 11 , and a plurality of balls 43 disposed between the inner ring 41 and the outer ring 42 .

Each inner ring 41 has a first annular surface 411 in the shape of an annular groove surrounding the axis L1 and abutting against the respective balls 43 , and each outer ring 42 has a first annular surface 411 in the shape of an annular groove surrounding the axis L1 and in contact with the respective balls 43 . The first annular surface 411 cooperates with the second annular surface 421 of the respective balls 43 .

A first curvature radius R1 is defined as a curvature radius of a curve of each bearing 4 extending from one side to the other side of the respective first annular surface 411 along the axial direction X. As shown in FIG. The curvature radius of each bearing 4 extending from one side to the other side of the respective second annular surface 421 along the axial direction X is defined as a second curvature radius R2. In this embodiment, the first radius of curvature R1 is equal to the second radius of curvature R2 and is greater than the radius r of each ball 43 . Therefore, on a section passing through the center of each ball 43 and extending along the axial direction X and passing through the axis L1, a gap is created with the respective first annular surface 411 and the respective second annular surface 421, so that the Each inner ring 41 is movable in the axial direction X relative to the respective outer ring 42 .

One of the bearings 4 is located between the first limiting portion 131 and the engaging portion 32 along the axial direction X, and the outer ring 42 abuts against the first limiting portion 131 . The other one of the bearings 4 is located between the blocking portion 34 and the second limiting portion 132 along the axial direction X, and the outer ring 42 abuts against the second limiting portion 132 , and the inner ring 41 abuts against the second limiting portion 132 . against the blocking portion 34 .

The adjusting member 5 is sleeved on the engaging portion 32 , and includes a locking ring 51 having an internal thread surface 515 and a screw 52 . The lock ring 51 has an arc-shaped body portion 511 , a first end portion 512 connected to one end of the body portion 511 along an arc direction, and an end portion of the body portion 511 opposite to the first end portion 512 connected along an arc direction. A second end 513 of a notch 514 is defined with the first end 512 .

The inner thread surface 515 of the lock ring 51 is detachably screwed to the outer thread surface 321 of the joint portion 32, so that the lock ring 51 can rotate around the axis L1 and move along the axis X to press the lock ring 51 on the first The bearing 4 between a limiting portion 131 and the engaging portion 32 . The first end 512 has a through hole 516 through which the 52 passes, and the second end 513 has a screw hole 517 corresponding to the through hole 516 and for the screw 52 to be screwed.

In the adjusting member 5 , the screw 52 is inserted through the through hole 516 along the tangential direction around the axis L1 , and then screwed into the screw hole 517 to lock and fix the locking ring 51 to the joint portion 32 .

Referring to FIG. 4 , FIG. 5 and FIG. 6 , the end cover 6 is screwed on one side of the joint portion 32 adjacent to the adjusting member 5 and cooperates with the housing 1 to cover the adjusting member 5 .

When the lock ring 51 is away from the bearing 4 located between the first limiting portion 131 and the joint portion 32 , the bearings 4 are not pressed by the force along the axial direction X, and each ball 43 and its respective The inner ring 41 and the respective outer ring 42 define two stationary contact points P1. A stationary connection line D1 is defined through the stationary contact points P1, and the stationary connection line D1 is perpendicular to the axis L1. In this embodiment, when each bearing 4 is not pressed by the force along the axial direction X, the relative positional relationship between the respective inner ring 41 , the outer ring 42 and the balls 43 is the same, so in the figure Only an enlarged cross-sectional view of the bearing 4 located between the first limiting portion 131 and the joint portion 32 is used for detailed description.

Referring to FIG. 4 , FIG. 6 and FIG. 7 , the process of operating the adjusting member 5 to cooperate with the blocking portion 34 , the first limiting portion 131 , and the second limiting portion 132 to push the bearings 4 is as follows:

First, disassemble the end cover 6 and loosen the screws 52 of the adjusting member 5 , and then rotate the lock ring 51 so that the lock ring 51 is located between the first limiting portion 131 and the engaging portion 32 along the axial direction X. The bearing 4 moves and pushes the corresponding inner ring 41, the stopper 34 is driven by the shaft body 31 to move toward the adjacent bearing 4 along the axial direction X and pushes the corresponding inner ring 41, at this time the The locking ring 51 cooperates with the blocking portion 34 to press the inner rings 41 of the bearings 4 to move the inner rings 41 toward each other, so that each inner ring 41 moves relative to the respective outer ring 42 along the axial direction X to a preload position. In the preload position, each inner ring 41 is displaced relative to the respective outer ring 42 along the axial direction X, and each ball 43 defines two preloads with the respective inner ring 41 and the respective outer ring 42 The contact point P2 defines a pre-compression connection line D2 passing through the pre-compression contact points P2 and a radial line L2 perpendicular to the axis L1, the pre-compression connection line D2 and the radial line L2 define a distance between 26 degrees Preload pressure angle θ to 28 degrees. In this embodiment, the preload pressure angle θ is 27 degrees. It is worth noting that when the inner ring 41 of each bearing 4 is located at the preloading position, the respective inner ring 41 and the outer ring 42 will be subjected to the reaction force of the balls 43 to move along the diameter relative to the axis L1 The axial direction is against the shaft body 31 and the ring wall 11 respectively, so that the inner ring 41 and the outer ring 42 cannot continue to be displaced along the axial X direction.

Finally, tighten the screw 52 to fix the lock ring 51 on the joint portion 32 , and then install the end cap 6 back to the joint portion 32 to complete the adjustment.

In this embodiment, when the bearings 4 are located at the preloading position, the inner ring 41 , the outer ring 42 and the balls of the bearing 4 located between the second limiting portion 132 and the blocking portion 34 The relative positional relationship of 43 is symmetrical with respect to an imaginary plane (not shown) located between the bearings 4 and perpendicular to the axis L1 and the bearing 4 located between the first limiting portion 131 and the joint portion 32, so Also in the drawings, only an enlarged cross-sectional view of the bearing 4 located between the first limiting portion 131 and the joint portion 32 is used for detailed description.

Since the bicycle still swings slightly from side to side when running in a straight line, and the body also tilts when cornering, the bearings 4 will be continuously affected by the housing 1 and the mandrel 3, and the adjusting member 5 along the axis Squeeze the force towards X.

Referring to FIGS. 7 and 8 , when this embodiment is installed on a bicycle (not shown), and the user rides the bicycle and the bicycle is inclined to the side of the end cover 6 compared to a horizontal plane S, the user's The weight is more concentrated on the bearing 4 on the inclined side. The first limiting portion 131 of the housing 1 and the locking ring 51 respectively generate two axial forces F on the bearing 4, and make the bearing 4 compare to the other The bearing 4 bears a large load. In this embodiment, the inner ring 41 and the outer ring 42 of each bearing 4 are adjusted to be misaligned and the preload pressure angle θ is defined, thereby reducing the balls 43 of each bearing 4 and the respective inner rings 43 . The play gaps between the rings 41 and the respective outer rings 42 along the axial direction X and the radial direction, respectively, improve the stability of the bicycle when the bicycle rolls when cornering.

When there is a gap between the balls 43 of one of the bearings 4 and the respective inner ring 41 or the outer ring 42 due to long-term riding, so that the housing 1 cannot rotate smoothly relative to the spindle 3, the above-mentioned The adjusting member 5 is adjusted in such a way that the balls 43 re-contact with the respective inner ring 41 and the outer ring 42 , so that the housing 1 can rotate relative to the spindle 3 smoothly and without shaking.

To sum up, the new bicycle hub with adjustable bearing pressure angular clearance can indeed achieve the purpose of the new model.

Referring to Figure 3, Figure 9 and Figure 10, a second embodiment of the new bicycle hub with adjustable bearing pressure angular clearance includes the housing 1, the ratchet seat 2, the spindle 3, the two bearings 4, An adjustment piece 7 and the end cover 6 .

The second embodiment is similar to the first embodiment, except that the adjustment member 7 includes a lock ring 71 having an inner thread surface 715, and a screw 72, the lock ring 71 has an opposite inner thread The outer peripheral surface 711 of the surface 715, a notch 712 recessed in the outer peripheral surface 711 and extending from the outer peripheral surface 711 to the inner thread surface 715 in the radial direction, and a notch 712 in the axial direction X and for the screw 72 to pass through. A through hole 713 is provided, and a screw hole 714 that communicates with the notch 712 along the axial direction X and is located on the side of the notch 712 opposite to the through hole 713 for the screw 72 to be screwed.

The locking ring 71 is detachably screwed to the engaging portion 32 , and the adjusting member 7 is to screw the screw 72 through the through hole 713 along the axial direction X, and then screw it into the screw hole 714 to lock the locking ring. 71 is locked and fixed to the joint portion 32 .

To sum up, the difference between the second embodiment and the first embodiment is only that the adjustment member 7 is locked and fixed to the joint portion 32 in a different manner, but the adjustment member 7 can also move along the axis X. To push the bearing 4 between the first limiting portion 131 and the engaging portion 32 , the second embodiment also has the same advantages and effects as the first embodiment, so it can also achieve the novel Purpose.

However, the above are only examples of the present invention, which should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included. within the scope of this patent.

1: Shell 11: Ring Wall 111: Inner peripheral surface 12: Perforation 13: Limiter 131: The first limit part 132: The second limit part 2: Ratchet seat 3: mandrel 31: Shaft body 32: Joint 321: External thread surface 33: Drive Department 34: Stopper 4: Bearing 41: inner ring 411: First Torus 42: Outer Ring 421: Second Torus 43: Ball 5: Adjustment pieces 51: lock ring 511: Body part 512: First End 516: Through hole 513: Second end 517: screw hole 514: Gap 515: Internal thread surface 52: Screws 6: End cap 7: Adjustment pieces 71: lock ring 711: Peripheral surface 712: Gap 713: Through hole 714: Screw hole 715: Internal thread surface 72: Screws L1: axis L2: radial line r: radius X: Axial P1: static contact point P2: preload contact R1: first radius of curvature R2: Second radius of curvature D1: static connection D2: preload connection F: Axial force S: horizontal plane θ: pressure angle

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Fig. 1 is an incomplete sectional view of an existing bicycle hub; FIG. 2 is a perspective combined view of a first embodiment of a bicycle hub with adjustable bearing pressure angular clearance according to the present invention; 3 is an exploded perspective view of the first embodiment; 4 is a partial cross-sectional view, showing that an adjusting member of the first embodiment has not yet cooperated with a first limiting portion, a second limiting portion, and a stop portion to squeeze two bearings; FIG. 5 is an enlarged cross-sectional view of part A in FIG. 4 , showing a stationary connection line passing through two stationary contact points of one of the bearings; FIG. 6 is a partial cross-sectional view showing that the adjusting member of this embodiment cooperates with the first limiting portion, the second limiting portion, and the blocking portion to squeeze the bearings; 7 is an enlarged cross-sectional view of part B in FIG. 6 , showing that a pre-compression connecting line passing through two pre-compression contact points of one of the bearings forms a pressure angle with a respective radial line; 8 is a partial cross-sectional view showing the first embodiment inclined to the pressure angle with respect to a horizontal plane; 9 is a partial exploded perspective view of a second embodiment of a bicycle hub with adjustable bearing pressure angular clearance of the present invention; and FIG. 10 is a front view of FIG. 9 .

1: Shell

11: Ring Wall

13: Limiter

131: The first limit part

132: The second limit part

31: Shaft body

34: Stopper

4: Bearing

5: Adjustment pieces

6: End cap

L1: axis

θ: pressure angle

X: Axial

Claims (5)

A bicycle hub with adjustable bearing pressure angle clearance, comprising: a casing, comprising a ring wall defining a perforation around an axis, and a limiting member protruding from the inner peripheral surface of the ring wall, the limiting member having an axially opposite arrangement along an axis parallel to the axis a first limiting portion and a second limiting portion of the A mandrel includes a shaft body pierced through the through hole, a joint portion connected to the shaft body along the axial direction and located on the side of the first limiting portion opposite to the second limiting portion, and a protruding portion on the side of the first limiting portion. a stop portion on the outer peripheral surface of the shaft body and located on the side of the second limiting portion opposite to the first limiting portion along the axial direction; Two bearings are disposed between the ring wall of the housing and the shaft body at intervals along the axial direction, and each bearing includes an inner ring abutting against and surrounding the shaft body, and a bearing surrounding the inner ring and abutting against the ring wall The outer ring, and a plurality of balls arranged between the inner ring and the outer ring, each inner ring has a first annular surface that surrounds the axis in the shape of a ring groove, and each outer ring has a ring groove that surrounds the axis The axis also cooperates with the respective first annular surfaces to sandwich the second annular surfaces of the respective balls, and defines each bearing extending from one side to the other side of the respective first annular surfaces along the axial direction. The radius of curvature of the curve is a first radius of curvature, and the radius of curvature of the curve that defines each bearing extending from one side to the other side of the respective second annular surface along the axial direction is a second radius of curvature, the first The radius of curvature is equal to the second radius of curvature and greater than the radius of each ball, one of the bearings is located between the first limit portion and the joint portion along the axial direction, and the outer ring abuts against the first limit a position part, the other one of the bearings is located between the stop part and the second stop part along the axial direction, the outer ring abuts against the second stop part, and the inner ring abuts against the stop part part; and An adjusting piece is sleeved on the engaging portion and can cooperate with the blocking portion, the first limiting portion and the second limiting portion to push the inner rings of the bearings, so that the inner rings move toward each other, each time An inner ring moves relative to the respective outer ring to a preloaded position along the axial direction. In the preloaded position, each inner ring is displaced relative to the respective outer ring along the axial direction. The inner ring and the respective outer ring define two pre-compression contact points, define a pre-compression connection line passing through the pre-compression contact points and a radial line perpendicular to the axis, the pre-compression connection line and the radial The line defines a pressure angle between 26 degrees and 28 degrees. The bicycle hub with adjustable bearing pressure angle clearance as claimed in claim 1, wherein the engaging portion has an external thread surface, and the adjusting member has an internal thread surface detachably screwed with the external thread surface. The bicycle hub with adjustable bearing pressure angle clearance as claimed in claim 2, wherein the adjustment member comprises a lock ring with the inner threaded surface, and a screw, the lock ring has an arc-shaped body portion, a A first end part connected to one end of the main body part along the arc direction, and a second end part connected to the end part opposite the first end part of the main body part along the arc direction and defining a gap with the first end part, the first end part One end portion has a through hole for the screw to pass through, and the second end portion has a screw hole corresponding to the through hole and for the screw to be screwed. The bicycle hub with adjustable bearing pressure angle clearance as claimed in claim 2, wherein the adjusting member comprises a lock ring with the inner thread surface, and a screw, the lock ring has a lock ring opposite to the inner thread surface The outer peripheral surface, a notch recessed on the outer peripheral surface, a through hole that communicates with the notch in the axial direction and is used for the screw to pass through, and a hole that communicates with the notch in the axial direction and is located on the side of the notch opposite to the through hole. Screw holes for this screw to be screwed into. The bicycle hub with adjustable bearing pressure angle clearance according to claim 4, wherein the notch extends from the outer peripheral surface to the inner thread surface in the radial direction.

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