JP2528345Y2 - Quick release hub for bicycle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a bicycle quick release hub device.

[0002]

2. Description of the Related Art A conventional quick release hub device for a bicycle is shown in FIGS. FIG. 10 is a partially cutaway front view of the hub device, and FIG. 11 is a right side view in FIG. FIG. 12 is a partially enlarged view showing a concept of a cam used in such a hub device, and FIG. 13 is a partial cross-sectional view of a main part showing an operation based on a cam lever operation.

As shown in FIGS. 10 and 11, the hub 1 has a hollow shaft 3 inserted through a hub body 2 and screwed pushers 4 from both sides thereof. The hub body 2 is rotatably supported via the ball bearings 5 arranged, and is fixed by a lock nut 6. Then, both ends of the hollow shaft 3 of the hub 1 are
The cam 11 is inserted between the housing 10 and the cam fitting hole 9 of the rod head 8 provided at one end of the tension rod 7 while the other end of the tension rod 7 is inserted into the hollow shaft 3. After adjustment nut 1
2 are screwed together, the fork end 21 and the hub 1 are arranged between the housing 10 and the adjustment nut 12, and the cam 11 is rotated by the rotation (X) of the cam lever 13 connected to the cam 11. Hose the hub 1 by tightening with lift A
It has a structure that can be instantly attached to and detached from the end 21. Reference numeral 14 denotes a cam shaft.

In FIG. 13, the upper half is a cam lever-1.
3 is a cutaway cross-sectional view when opening 3 and the lower half is a similar cross-sectional view when the cam lever 13 is closed. That is, when the cam lever 13 is completely opened (X ₁ ),
A play B is generated between the fork end 21 and the housing 10 based on the lift A of the cam 11, thereby facilitating attachment and detachment of the hub device. On the other hand, when the cam lever 13 is closed (X
_{In (2} ), the fork end 21 and the housing 10 are fastened with a large force, and the hub device is attached.

[0005]

In the conventional quick release hub device as described above, the fixing function by the turning operation of the cam lever 13 is already as shown in FIG.
That is, the horizontal axis indicates the 180-degree rotation angle of the cam lever 13, and the left vertical axis indicates a standard total stroke of 2 mm in the axial direction.
Degree is given. Figure a _1-wire is lever - is a curve showing the click of a relationship - rotation angle and stroke. On the other hand, stroke drawing b ₁ line corresponds to the right vertical axis - cam lever -1 corresponding to click
3 shows the operation force and the hub fixing force to the fork end 21. The axial stroke at a play lever angle of 100 degrees required for attachment and detachment is provided at about 1.3 mm. Therefore, the remaining tightening stroke is about 0.6 mm, but when the tightening is completed, the hub fixing force to the fork end 21 is 1150 kg against the standard value of 50 kgf.
f. Therefore, if this setting is maintained as it is, the fixing force of the hub 1 to the fork end 21 is too high. In the figure, c ₁ line is stroke corresponds to the left vertical axis - shows the distal end of the operating force - cam lever corresponding to click.

However, if the tightening angle of the cam lever 13 shifts to the 180-degree side due to wear of the tightening surface, loosening of the adjusting nut 12, or the like, the change in the angle of the cam lever 13 is not shown. Due to the characteristic that the hub fixing force changes steeply as shown at 14, a large decrease in the hub fixing force can occur.

Further, the lever operating force is insufficient, so that the cam lever can be used.
When the cam 13 is set up in the middle of the cam lift, a force acts on the cam 11 in the loosening direction, so that the cam lever 13 suddenly opens in the loosening direction due to the vibration or impact of the wheel, and A situation occurs where the fastening force is lost. That is, it has been pointed out that there is a possibility that the wheels may suddenly come off during traveling and cause injury.

SUMMARY OF THE INVENTION The present invention solves the above problems of the conventional quick release hub device, and allows the rider to ride safely without loosening the wheels during running or suddenly coming off the wheels and causing injury. It is an object of the present invention to provide a quick release hub device for a bicycle which can be operated.

[0009]

In order to achieve the above object, the bicycle quick release hub device 31 of the present invention has the following configuration. That is, the hollow shaft 33 is inserted through the hub body 32, and a ball pusher 34 is screwed from both sides of the hollow shaft 33, and the hub body 32 is rotatably supported via a ball bearing 35 arranged on the track of the ball pusher 34. A fork end for a bicycle wheel configured to be fixed with a lock nut 36, wherein a fork end is fitted on both sides of the hollow shaft 33, and a rod head 38 is attached to one end of a tension rod 37 inserted into the hollow shaft 33. to form a comprises a housing 40 having a bottom 40 ₀ opposed thereto and the rod head 38 the inner surface of the tension rod 37 parts side, and interior spring 51 between the rod head 38 inner surface and the bottom 40 ₀ of the housing 40 And rod head 3
8, a cam lever 4 having a cam portion 41 facing the outer surface thereof
3 is rotatably mounted via a cam shaft 44 inserted into the housing 40, and the rod head 38 is pressed and released by the cam portion 41, and the housing 40 is forked by the spring 51 accordingly. A quick relays hub device for a bicycle is provided which is arranged so as to be elastically attached to and released from the end 21, and has an adjusting nut 42 screwed into a screw portion 45 provided at the other end of the tension rod 37.

[0010] Preferably, the structure of the cam lever 43 is as follows. That is, one end of the cam lever 43 is bent into a substantially L-shape, a cam portion 41 and a cam shaft 44 are formed thereon, and a roller 46 is externally fitted to the cam portion 41 and a bearing provided on the housing 40. The cam is rotatably inserted into the hole 47. By doing so, the frictional resistance of the cam is reduced, and the lever operating force can be reduced.

[0011]

In the bicycle quick release hub device constructed as described above, the force applied to the cam lever when attaching and detaching the hub device is completely opposite to that of the conventional hub device. It was obtained, and when the force was applied, the fastening force was released.

That is, when the cam lever 43 is turned in the closing direction, that is, the direction in which the pressing of the rod head 38 is released, the force that has restrained the spring 51 by the cam portion 41 via the rod head 38 is released, and the spring is released. The hub 31 and the hood provided between the housing 40 and the adjustment nut 42 by pressure
The end 21 is clamped and fixed. That is, since the force is always applied in the direction of holding and fixing the hub 31 by the spring pressure of the spring 51, there is no fear that the wheel is detached due to vibration or impact.

Conversely, when the cam lever 43 is turned in the opening direction, that is, the direction in which the rod head 38 is pressed, the cam portion 41 holds down the rod head 38, the spring 51 is compressed, and the housing 40, the fork end 21, hub 31
Since there is play between each of the adjusting nuts 42 and the adjusting nuts 42, they can be easily attached and detached.

FIG. 9 shows the relationship between the rotation angle of the cam lever and the stroke in the axial direction showing the operation of the present invention. In the figure, the line a ₂ is a curve showing the relationship between the lever rotation angle and the stroke, and the line d ₂ is the potential spring force generated by play, corresponding to the right vertical axis after the lever play. it is caused a hub fixed force b _2-wire for Kuendu 21 - ho to. Further, c _2-wire is stroke corresponds to the left vertical axis - shows the distal end of the operating force - cam lever corresponding to click.

The operation angle of the cam lever 43 of the present invention is 180.
As the cam is not in contact with the rod head 38 just before closing, the clamping force of the hub 31 on the fork end 21 is performed only by a predetermined spring force. Therefore, even if the size of the structure to be sandwiched or the distance between the structures to be sandwiched changes to a certain extent, the spring force can be changed gently with respect to the change in the stroke in the axial direction. -The fastening force to the ends 21 does not significantly deviate. That is, unlike the prior art, the hub fixing force is greatly reduced due to the friction of the tightening surface, the loosening of the adjusting nut, and the like, and there is no fear that a large accident such as the wheel being loosened and coming off will occur.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a partially cutaway front view and a right side view showing a first embodiment of the present invention. 3 and 4
FIG. 5 is an operation diagram, and FIG. 5 is an explanatory diagram of a cam lever.

That is, the hollow shaft 33 is inserted through the hub body 32, and ball pushes 34 are screwed from both sides thereof.
The bicycle hub 31 is rotatably supported and fixed with a lock nut 36. On the other hand, to form a rod head 38 at one end of the tension rod 37 comprises a housing 40 having a bottom 40 ₀ to face the inner or tension rod 37 side of the rod head 38, and the rod head 38 the inner surface of the housing 40 it is to interior a spring 51 between the bottom 40 _0. Further, a cam lever 43 having a cam portion 41 is rotatably mounted on the outer surface of the rod head 38 via a cam shaft 44 mounted on the housing 40, and the rod head 38 is pressed by the cam portion 41. And a quick release mechanism for releasing this.

In the cam lever 43, the cam portion 41
In this embodiment, a collar 48 for positioning and reinforcing is fixed, and the camshaft 44 is inserted therein. However, the present invention is not limited to this.
The camshaft 44 may be provided with a polygonal through-hole, and a portion of the camshaft 44 facing the camshaft 44 may be formed into a polygon that can be fitted thereto, and may be fixed with screws. The cam lever 43 illustrated here has a cam portion 41 and a cam shaft 44 as shown in FIG.
Has a lift D between itself and the collar 48 fixed thereto.

When assembling the bicycle hub 31 to the fork end 21, that is, for assembling the wheel, both ends of the hollow shaft 33 are supported by the fork end 21 as shown in FIG. The tension nut 37 is passed through the hollow shaft 33, and the adjustment nut 42 is tightened to a specified position. Next, when the cam lever 43 is operated in the closing direction (X ₂ ), the suppression of the spring 51 by the cam 41 is released, and the hub 31 is held and fixed to the fork end 21 by the spring pressure of the spring 51.

Conversely, when removing the hub 31 from the fork end 21, that is, when removing the wheels, the cam lever 43 is operated in the opening direction (X ₁ ) as shown in FIG. 51 is compressed by the cam 41 and play C is generated between the hub 31 and the fork end 21 so that it can be easily removed.

FIG. 6 is a perspective view of a cam lever portion of a bicycle quick release hub device according to a second embodiment of the present invention. Although the structure of the hub 31 is the same as that of the first embodiment and is omitted, the quick release mechanism is different. That is, as shown in FIG. 6, one end of the cam lever 43 is bent into a substantially L-shape, a cam portion 41 and a cam shaft 44 are formed thereon, and a roller 46 is externally fitted to the cam portion 41. , Is rotatably inserted into a bearing hole 47 provided in the housing 40 and fastened by a nut 49 so as not to come off. When the roller 46 is externally fitted to the cam portion 41 in this manner, the frictional resistance of the cam is reduced, and the lever operation is further reduced.

FIGS. 7 and 8 are operation diagrams of the second embodiment shown in FIG. That is, in FIG. 7, when the roller 46 provided on the cam portion 41 releases the pressing of the rod head 38, the fork end 21 and the housing 40 are fastened. As shown in FIG. 8, play C occurs between the fork end 21 and the housing 40. Therefore, the method of attaching and detaching the wheels may be operated in the same manner as in the first embodiment.

[0023]

[Effects of the Invention] Since the present invention is configured as described above, the present invention has the following effects, and a great effect can be obtained in practical and safety aspects. The device of the present invention is structured such that it is fastened by the elasticity of the spring 51, contrary to the conventional method. That is, the operating force of the cam lever 43 requires a large operating force in the direction of attaching the hub 31 to the fork end 21 in the conventional one, but the present invention conversely requires the play direction of removing the hub 31 from the fork end 21. That is, since the direction in which the spring 51 is compressed by the cam lever 43 is a large operating force, when tightening, the direction is followed by the elasticity of the spring 51. Dangerous situations, such as the cam being set up prematurely due to insufficient operating force, are eliminated.

Further, since the operation angle of the cam lever 43 is closed by 180 degrees, it becomes a zero lift portion from immediately before, and the cam does not contact the rod head 38, so that the fork end 2 of the hub 31 is not used.
The clamping force to 1 is performed only by the defined spring force. Therefore, even if the dimensions of the structures to be sandwiched or the distance between the structures to be sandwiched change to some extent, the spring force can be changed gently with respect to the change in the stroke in the axial direction. -The fastening force to the ends 21 does not significantly deviate. That is, unlike the conventional one, the hub fixing force is greatly reduced due to the friction of the tightening surface, the loosening of the adjusting nut, and the like, and there is no fear that a large accident that the wheel is loosened and comes off occurs.

Furthermore, since the accidental rotation of the cam lever 43 in the loosening direction cannot occur against the spring force, the function of fastening the hub 31 to the fork end 21 is impaired by an erroneous operation, whereby the wheel comes off. Not at all.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway view of the right side view in FIG.

FIG. 3 is a partial cross-sectional view showing the operation of the present invention.

FIG. 4 is a fragmentary sectional view showing the operation of the present invention.

FIG. 5 is an explanatory view particularly of a cam portion.

FIG. 6 is a perspective view of a cam lever portion showing another embodiment of the present invention.

FIG. 7 is a partial cross section of a main part showing the operation.

FIG. 8 is a partial cross-sectional view of a main part showing the same operation.

FIG. 9 is a graph showing the functional characteristics of the device of the present invention.

FIG. 10 is a partially cutaway front view showing a conventional apparatus.

FIG. 11 is a right side view of the device in FIG.

FIG. 12 is an explanatory diagram of a cam in a conventional device.

FIG. 13 is a partial cross-sectional view of a main part showing the operation.

FIG. 14 is a graph showing functions of a conventional device.

[Explanation of symbols]

21 ‥‥ Hawk end 31 ‥‥ hub 32 ‥‥ hub body 33 ‥‥ hollow shaft 34 ‥‥ ball press 35 ‥‥ ball bearing 36 ‥‥ locknut 37 ‥‥ tension rod 38 ‥‥ rod head 40 ‥‥ housing 40 ₀ ‥‥ Bottom part of housing 41 ‥‥ Cam part 42 ナ ッ ト Adjustment nut 43 ‥‥ Cam lever 44 ‥‥ Cam shaft 45 ‥‥ Screw part 46 ‥‥ Roller 47 ‥‥ Bearing hole 48 ‥‥ Collar 49 ‥‥ Nut 51 ‥‥ Spring

Claims (2)

(57) [Scope of request for utility model registration] 1. A hollow shaft 33 is inserted through a hub body 32, and a ball pusher 34 is screwed from both sides thereof.
A hub gripping device for a bicycle wheel configured to rotatably support the hub body 32 via a ball bearing 35 disposed on a track of the bicycle wheel and to fix the hub body 32 with a lock nut 36, wherein the hub body 32 is provided on both sides of the hollow shaft 33. Fit the hawk end,
One end of the tension rod 37 is inserted into the hollow shaft 33 to form a rod head 38 comprises a housing 40 having a bottom 40 ₀ opposed thereto and the rod head 38 the inner surface of the tension rod 37 parts side, of the housing 40 spring between the rod head 38 inner surface and the bottom 40 ₀ 5
1 and facing the outer surface of the rod head 38,
The cam lever 43 having the cam portion 41 is
The rod head 38 is pressed and released by the cam portion 41 through the cam shaft 44 inserted in the housing 40, and the housing 40 is elastically attached to the fork end 21 by the spring 51. And an adjusting nut 42 provided on a screw portion 45 provided at the other end of the tension rod 37.
A quick relays hub device for bicycles with a screw. 2. A structure of a cam lever portion in a bicycle quick release hub device, wherein one end of a cam lever 43 is bent into a substantially L shape, and a cam portion 41 and a cam shaft 44 are formed there. 2. A bicycle quick release hub device according to claim 1, wherein said roller is fitted to said outer periphery and rotatably inserted into a bearing hole provided in said housing.