JP2014094692A - Spoke wheel, hub, and bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel type of a spoke wheel, and a bicycle having the spoke wheel, in which length difference of spokes disposed on right-and-left wheel surfaces in a spoke wheel having a hub having a hub offset, is shortened.SOLUTION: In the spoke wheel 1 having a hub 2 having a hub offset, a number of intersection of a spoke 4 forming a second wheel surface F2 by being disposed between a second hub flange 222R and a rim 3 is larger than a number of intersection of a spoke 4 forming a first wheel surface F1 by being disposed between a first hub flange 222L and the rim 3.

Description

  The present invention relates to a spoke wheel, a hub used for the spoke wheel, and a bicycle including the spoke wheel.

  As a wheel provided in a bicycle, a spoke wheel comprising a hub serving as an axle, a rim on which a tire is mounted, and a plurality of spokes (wire spokes) assembled between the hub and the rim. Is common. The spoke wheels are roughly classified into two types, “tangent combination (tangential combination)” and “radial combination (radial combination)”, depending on the way the spokes are assembled.

  The tangent assembly is an assembly method in which the spokes are stretched between the hub and the rim while the spokes intersect with each other. Generally, there are three types of assembly methods (two intersections, three intersections) with different numbers of spoke intersections. Crossing and four crossing) have been implemented.

  The two intersections are a method of associating three adjacent (two-hole skip) spokes, and every spoke intersects with two spokes for convenience. The three intersections are a method of assembling five adjacent (four holes) spokes, and every spoke intersects with three spokes for convenience. The four intersections are a method of associating seven adjacent (six-hole skip) spokes, and every spoke intersects with four spokes for convenience. Each of the two crossings, the three crossings, and the four crossings is also referred to as a four-piece set (or four-piece set), a six-piece set (or six-piece set), and an eight-piece set (or eight-piece set). Has been. Theoretically, other ways of assembly (for example, the way of crossing adjacent spokes (one crossing), etc.) are possible. However, in the bicycles currently on the market, tangent combinations other than the above three types of ways of assembly are possible. Spoke wheels that have been made are virtually unmounted.

  On the other hand, the radial assembly is a method of assembling the spokes radially from the hub toward the rim, and each spoke does not intersect with other spokes.

By the way, as shown in FIG. 11A, in the conventional spoke wheel 100, a shift sprocket 6 is attached to one side of the hub shell 22 (usually, the right side in the traveling direction of the bicycle). For example, a hub 2 having a free hub body 23 adjacent thereto is provided. As shown in FIG. 11B, the hub 2 of this type is shortened along the axial direction of the hub shell 22 in accordance with the bulk of the free hub body 23. A mismatch occurs between the center (X ₀ ) of (X) and the distribution center (Y ₀ ) of the distance (Y) between the lock nuts. This discrepancy is commonly referred to as “hub offset”. Further, the longer side distance (Z _L , Z _R ) between the flange and the center is referred to as “offset direction”.

Even in the spoke wheel 100 having the hub 2 in which the hub offset occurs, the distribution center (Y ₀ ) of the distance (Y) between the lock nuts in the hub 2 is set on the center plane of the rim 3. The Therefore, in the spoke wheel 100, the place angle (β) of the wheel surface constructed on the opposite side (sprocket side) of the offset direction is smaller than the place angle (α) of the wheel surface constructed on the offset direction side.

  Here, the tension of the spoke 4 that constructs the wheel surface on the opposite side to the offset direction to which the small place angle (β) is applied is the spoke 4 that constructs the wheel surface on the offset direction side to which the large place angle (α) is provided. It tends to be larger than the tension. For this reason, the buffering capacity between the wheel surfaces is wrinkled, and the spoke 4 may be damaged such as bending or bending.

  Therefore, recently, the outer diameter of the hub flange on the opposite side of the offset direction, which is referred to as a “high / low hub”, is made larger than the outer diameter of the hub flange on the offset direction side, and the spoke hole of the hub flange on the opposite side of the offset direction is formed. A hub having a larger pitch circle diameter has been developed (see, for example, Non-Patent Document 1 below).

DMR BIKES 2012 PRODUCT CATALOGUE

If the high / low hub is used, the place angle of the wheel surface constructed on the opposite side of the offset direction can be brought close to the place angle of the wheel surface constructed on the offset direction side, thereby constructing the left and right wheel surfaces respectively. The tension difference between the spokes 4 can be reduced.

  However, the difference in place angle between the left and right wheel surfaces that can be corrected by the high / low hub is very small. Therefore, the tension difference corrected by using the high / low hub is not necessarily sufficient. It was.

  The present invention has been developed to solve the above technical problem, and is a novel spoke wheel in which a difference between the left and right wheel surfaces in a spoke wheel having a hub provided with a hub offset is corrected. It is an object of the present invention to provide a novel hub used for the spoke wheels and a novel bicycle equipped with the spoke wheels.

  In order to solve the above technical problem, a spoke wheel of the present invention is a spoke wheel comprising a hub, a rim, and a plurality of spokes stretched between the hub and the rim. The hub is provided with a hub offset in which the center of the flange interval and the distribution center of the distance between the lock nuts are not matched, and a first hub flange existing on the offset direction side of the hub, The second hub flange on the opposite side of the offset direction is formed with a plurality of spoke holes for attaching one end of the spoke, and is stretched between the first hub flange and the rim. The number of spokes that are stretched between the second hub flange and the rim to construct the second wheel surface is larger than the number of spokes that construct one wheel surface. To (hereinafter, referred to as the present invention the wheel.).

  In the wheel of the present invention, when the number of spoke intersections constructing the first wheel surface is two intersections, the number of spoke intersections constructing the second wheel surface is three or four intersections, and the first wheel surface When the number of crossing of the spokes for constructing the crossing is three, the number of the crossing of the spokes for constructing the second wheel surface is preferably four crossing.

  In the wheel of the present invention, it is preferable that the pitch circle diameter of the spoke holes provided in the second hub flange is larger than the pitch circle diameter of the spoke holes provided in the first hub flange.

  In the wheel of the present invention, a preferred embodiment is one in which the outer diameter of the second hub flange is larger than the outer diameter of the first hub flange.

  In the wheel of the present invention, it is preferable that the length of the spoke that constructs the first wheel surface is the same as the length of the spoke that constructs the second wheel surface.

  The hub of the present invention is used for the wheel of the present invention in which the length of the spoke for constructing the first wheel surface is the same as the length of the spoke for constructing the second wheel surface (hereinafter referred to as the following). , Referred to as the present invention hub).

  The bicycle of the present invention comprises the wheel of the present invention (hereinafter referred to as the present invention bicycle).

  ADVANTAGE OF THE INVENTION According to this invention, the difference which exists between the right-and-left wheel surfaces (the said 1st wheel surface and said 2nd wheel surface) in the spoke wheel which comprises the hub provided with hub offset can be corrected suitably.

Fig.1 (a) is a perspective view which shows this invention wheel which concerns on Embodiment 1 in the state with which the tire was mounted | worn, and FIG.1 (b) is the 1st wheel surface constructed | assembled to the said this invention wheel. FIG.1 (c) is a schematic diagram which shows the 2nd wheel surface constructed | assembled to the said wheel of this invention. 2 (a) is an exploded perspective view showing the hub, FIG. 2 (b) is a plan view showing the hub, and FIG. 2 (c) shows a first hub flange and a second hub flange. It is a top view shown in comparison. FIG. 3 is a perspective view showing the rim. FIG. 4 is a perspective view showing a spoke. FIG. 5A is an enlarged sectional view showing one end side of the stretched spoke, and FIG. 5B is an enlarged sectional view showing the other end side of the stretched spoke. FIG. 5C is an enlarged perspective view showing the hub on which the spokes are stretched. FIG. 6 is a side view showing the bicycle of the present invention. FIG. 7A is a schematic diagram showing the swing angle of the spoke that constructs the first wheel surface, and FIG. 7B is a schematic diagram showing the swing angle of the spoke that constructs the second wheel surface. is there. FIG. 8 is a perspective view showing the wheel of the present invention according to the second embodiment in a state where a tire is mounted, and FIG. 8B is a schematic diagram showing a first wheel surface formed on the wheel of the present invention. FIG. 8 (c) is a schematic diagram showing a second wheel surface formed on the wheel of the present invention. 9 (a) is an exploded perspective view showing the hub, FIG. 9 (b) is a front view showing the hub, and FIG. 9 (c) shows the first hub flange and the second hub flange. It is a top view shown in comparison. FIG. 10 is a schematic view schematically showing the wheel surface of the wheel of the present invention. Fig.11 (a) is an enlarged view which shows a conventionally well-known spoke bicycle, FIG.11 (b) is a schematic diagram which shows typically the wheel surface of the said spoke bicycle.

  Hereinafter, although an embodiment of the present invention is described based on a drawing, the present invention is not limited to this embodiment.

<Embodiment 1>
FIG. 1 shows an embodiment of the wheel 1 of the present invention. This wheel 1 of the present invention is designed for a bicycle rear wheel, and includes a hub 2, a rim 3, and a plurality of spokes 4.

  As shown in FIG. 2A, the hub 2 includes a hub shaft 21, a hub shell 22 that forms an outer shell of the hub 2, a free hub body 23 disposed adjacent to the hub shell 22, and a pair of locks. And a nut 27.

  The hub shaft 21 is a rod body that serves as an axle of the wheel 1 of the present invention, and a screw thread for screwing the lock nut 27 is engraved on both ends of the hub shaft 21.

The hub shell 22 includes a hollow cylindrical hub shell main body 221 and two disk-shaped hub flanges (first hub flange 222L and second hub flange 222R). The first hub flange 222L and the second hub flange 222R are arranged so that their surfaces face each other at a position spaced apart in the axial direction of the hub shell main body portion 221. A distance (X) from the center of the thickness of the first hub flange 222L to the center of the thickness of the second hub flange 222R corresponds to the “flange interval” in the claims (FIG. 2B). reference).

As shown in FIG. 2 (c), the first hub flange 222L and the second hub flange 222R have a plurality of spoke holes (hereinafter referred to as hub-side spoke holes 224) penetrating the front and back of each. Individually formed. The hub-side spoke holes 224 are arranged so as to draw a circle along the peripheral edge of each hub flange 222R, 222L, and the diameter of the circle (pitch circle) drawn by the plurality of hub-side spoke holes 224 is This corresponds to the “pitch circle diameter of the spoke holes” in the claims. In this embodiment, the the pitch circle diameter of the hub-side spoke holes 224 (D ₂₎ in the pitch circle diameter of the first hub flange 222L (D ₁₎ the second hub flange 222R, are made the same.

The freehub body 23 has a cylindrical shape, and a spline 231 for attaching a sprocket is provided on the outer peripheral surface thereof.

The free hub body 23 is connected to the end of the hub shell 22 on the second hub flange 222R side via a ratchet 26. The hub shaft 21 is inserted along the axial direction of both the hub shell 22 and the free hub body 23 connected to each other, and one end side thereof is freely rotatable by a bearing (cup and cone bearing) 24 provided on the hub shell 22. The other end side is rotatably supported by a bearing (cup and cone bearing) 25 provided on the freehub body 23.

Lock nuts 24 are attached to both ends of the hub shaft 21 protruding from the bearings 24 and 25, respectively. The distance (Y) between the outer surfaces of each lock nut corresponds to the “distance between lock nuts” in the claims (see FIG. 2B).

The hub 2 has a mismatch between the center (X ₀ ) of the flange interval (X) and the distribution center (Y ₀ ) of the distance between lock nuts (Y) due to the presence of the free hub body 23, That is, a “hub offset” is provided.

As shown in FIG. 3, the rim 3 is an annular body that can hold a tire (and a tube) along an outer peripheral surface. A plurality of spoke holes (hereinafter referred to as rim side spoke holes 31) are formed in the rim 3 in a state of being spaced apart along the circumferential direction. The total number of the rim side spoke holes 31 is the same as the total number of the hub side spoke holes 224 formed in the first hub flange 222L and the second hub flange 222R in the hub 2.

As shown in FIG. 4, the spoke 4 is a rod body provided with a bent portion (elbow) 41 in the vicinity of one end. A head 42 is provided at one end of the spoke 4, and a screw portion 43 is formed at the other end.

<Tensioning of spoke 4>
-Construction of the first wheel surface F1-
The plurality of spokes 4 are stretched between the hub-side spoke holes 224 provided in the first hub flange 222L and the rim-side spoke holes 31 provided in the rim 3, thereby providing the first wheel surface F1. In constructing (see FIG. 1 (b)), as shown in FIG. 5 (a), the spoke 4 is inserted into the one hub side spoke hole 224 provided in the first hub flange 222L from the other end side. As shown in FIG. 5 (b), after inserting the spoke 4 toward the rim 3 using the bent portion 41 while preventing the head 42 at one end from slipping out. The threaded portion 43 provided at the other end of the spoke 4 and the rim side spoke hole 31 formed on the inner peripheral surface of the rim 3 are connected via the nipple 5.

  Hereinafter, for convenience of explanation, one hub side spoke hole 224 selected in the above operation is referred to as a “first hub side spoke hole 224”, and is formed so as to draw a circle with respect to the first hub flange 222L. For the other plurality of hub-side spoke holes 224, "second hub-side spoke hole 224" and "third hub-side spoke hole 224" are arranged in the counterclockwise order from the first hub-side spoke hole 224. , “Fourth hub-side spoke hole 224”. Further, the spoke 4 attached to the Nth hub side spoke hole 224 is referred to as “the Nth spoke” so that the spoke 4 attached to the first hub side spoke hole 224 is referred to as “first spoke 4”. 4 ".

As shown in FIG. 5C, for the odd-numbered hub side spoke holes 224 such as the first, third, fifth, etc., the spoke 4 is placed inside the first hub flange 22R (the hub shell body 221). The head 42 of the spoke 4 is exposed toward the inner side of the first hub flange 22R. On the other hand, for the second, fourth, sixth, etc. even-numbered hub side spoke holes 224, the spokes 4 are inserted from the outside to the inside of the first hub flange 22R, so that the spokes 4 The head 42 is exposed to the outside of the first hub flange 22R.

Next, similarly to the first spoke 4, the fourth spoke 4 is extended toward the rim 2, and the first spoke 4 and the fourth spoke 4 are crossed. In the present embodiment, this intersection is such that the first spoke 4 is on the upper side (outside of the first wheel surface F1).

Finally, the screw portion 43 provided at one end of the fourth spoke 4 and the rim side spoke hole 31 formed on the inner peripheral surface of the rim 3 are connected via the nipple 5. At this time, the rim side spoke hole 31 to which the fourth spoke 4 is connected is the rim side spoke hole 31 that is adjacent to the rim side spoke hole 31 to which the first spoke 4 is attached. Is selected.

Similarly, the third spoke 4 and the sixth spoke 4, the fifth spoke 4 and the eighth spoke 4, and the odd-numbered spoke 4 and the three adjacent spokes 4 (two holes skipping) If the threaded portion 43 provided at one end of each spoke 4 and the rim side spoke hole 31 formed on the inner peripheral surface of the rim 3 are connected to each other while crossing each in turn, the first wheel A plane F1 is constructed (see FIG. 1B).

The first wheel surface F1 is constructed in a manner called “two intersections” in which each spoke 4 intersects with the other two spokes 4 for convenience.

-Construction of second wheel surface F2-
The second wheel surface F2 shown in FIG. 1C is constructed in the same manner as the first wheel surface F1 except that the selection of the pair of spokes 4 to be intersected is different.

That is, when constructing the second wheel surface F2, for example, the first spoke 4 and the sixth spoke 4, the third spoke 4 and the eighth spoke 4, and so on, A threaded portion 43 provided at one end of each spoke 4 and a rim side spoke hole 31 formed on the inner peripheral surface of the rim 3 while crossing five adjacent spokes 4 in order. Link.

The second wheel surface F2 is constructed in a manner called “three intersections” in which each spoke 4 intersects with the other three spokes 4 for convenience.

  As described above, the wheel 1 of the present invention according to the present embodiment is constructed as a bicycle rear wheel, and the bicycle including the wheel 1 of the present invention is the bicycle 10 of the present invention as shown in FIG.

  The wheel 1 of the present invention is not necessarily assumed to be attached only to a bicycle, but is a vehicle (for example, a motorcycle, an automobile, a tricycle) that moves by rolling of other wheels, or a transporting instrument having wheels. Either may be provided.

  Since the spoke wheel 1 according to the present embodiment includes the hub 2 provided with a hub offset, as with the conventional spoke wheel 100 shown in FIG. 11, from the place angle of the first wheel surface F <b> 1. The place angle of the second wheel surface F2 is reduced.

However, in the wheel 1 of the present invention according to the first embodiment, the number of intersections (three intersections) of the second wheel surface F2 is made larger than the number of intersections (two intersections) of the first wheel surface F1. As shown in FIG. 7, from the swing angle of each spoke 4 that constructs the first wheel surface F1 (the angle formed by the tangent to the pitch circle drawn by the hub side spoke hole 224 and the spoke 4) (θ ₁ ), the second The swing angle (θ ₂ ) of each spoke 4 that constructs the wheel surface F2 is reduced.

As a result, the angle difference existing between the place angle of the first wheel surface F1 and the place angle of the second wheel surface F2 is the swing angle (θ ₁ ) of each spoke 4 constituting the first wheel surface F2. It is offset by the angle difference existing between the swing angle (θ ₂ ) of each spoke 4 that constructs the second wheel surface F2.

  Thus, the tension difference existing between the tension of the spoke 4 that constructs the second wheel surface F2 and the tension of the spoke 4 that constructs the first wheel surface F1 can be reduced. It is possible to eliminate an extreme deviation in the buffer capacity between the wheel surface F1 and the second wheel surface F2.

  In the first embodiment, the first wheel surface F1 is constructed by two intersections, while the second wheel surface F2 is constructed by three intersections. While not limited, while constructing the first wheel surface F1 in two intersections, while constructing the second wheel surface F2 in four intersections, while constructing the first wheel surface F1 in three intersections, The second wheel surface F2 may be constructed by four intersections. In short, the number of intersections of the spokes 4 that construct the second wheel surface F2 may be larger than the number of intersections of the spokes 4 that construct the first wheel surface F1.

<Embodiment 2>
FIG. 8 shows another embodiment of the wheel 1 of the present invention. The wheel 1 of the present invention is also designed for the rear wheel of a bicycle as in the first embodiment, and includes a hub 2, a rim 3, and a plurality of spokes 4.

  The rim 3 and the spoke 4 were the same as those used in the first embodiment.

As shown in FIG. 9, the hub 2 used in this embodiment has an outer diameter of the second hub flange 222R larger than an outer diameter of the first hub flange 222L, and is formed on the first hub flange 222L. The pitch circle diameter (D ₂ ) drawn by the hub-side spoke hole 224 formed in the second hub flange 222R is larger than the pitch circle diameter (D ₁ ) drawn by the hub-side spoke hole 224. The remainder of the hub 2 is the same as that described in the first embodiment.

  In the present invention wheel 1 according to the present embodiment, the first wheel surface F1 is constructed by three intersections, and the second wheel surface F2 is constructed by four intersections (FIGS. 8B and 8C). reference).

The wheel 1 of the present invention according to this embodiment has a hub-side spoke formed on the second hub flange 222R based on a pitch circle diameter (D ₁ ) drawn by the hub-side spoke hole 224 formed on the first hub flange 222L. Since the pitch circle diameter (D ₂ ) drawn by the hole 224 is made large, as shown in FIG. 10, the place angle (α) of the first wheel surface F1 and the place angle (β) of the second wheel surface F2 are shown. The difference of becomes smaller.

By the way, in the conventional spoke wheel 100 shown in FIG. 11, the length of the spoke 4 that constructs the wheel surface on the opposite side to the offset direction to which a small place angle (β) is given is given a large place angle (α). It is slightly shorter than the length of the spoke 4 that constructs the wheel surface on the offset direction side. In the conventional spoke wheel 100, as the hub 2, the pitch circle diameter (D ₁ ) drawn by the hub-side spoke hole 224 formed in the first hub flange 222L as in the second embodiment is used. When a high / low hub with a large pitch circle diameter (D ₂ ) drawn by the hub-side spoke holes 224 formed in the two hub flanges 222R is used, the length between the spokes 4 constituting each wheel surface The difference is further increased.

  Therefore, in constructing the conventional spoke wheel 100, it is necessary to prepare two types of spokes 4 having different lengths.

  On the other hand, in the present invention, in order to correct the tension difference between the spoke 4 disposed on the first wheel surface F1 and the second wheel surface F2, the intersection of the spokes 4 constructing the first wheel surface F1. Since the technical means for increasing the number of intersections of the spokes 4 that construct the second wheel surface F2 is employed rather than the number, it is necessary to increase the length of the spokes 4 that construct the second wheel surface F2. As a result, contrary to the conventional spoke wheel 100, the length of the spoke 4 that constructs the second wheel surface F2 to which a small place angle (β) is given is given a large place angle (α). It becomes longer than the length of the spoke 4 that constructs the first wheel surface F1.

  Of course, in the wheel 1 of the present invention, if there is a difference between the lengths of the spokes 4 constituting the wheel surfaces F1 and F2, the two kinds of spokes 4 having different lengths can be used to construct the wheel 1 of the present invention. It is necessary to prepare.

However, in the wheel 1 of the present invention, as in the second embodiment, it is formed in the second hub flange 222R from the pitch circle diameter (D ₁ ) drawn by the hub side spoke hole 224 formed in the first hub flange 222L. When a high-low hub having a large pitch circle diameter (D ₂ ) drawn by the hub-side spoke hole 224 is used, the length required for the spoke 4 that constructs the second wheel surface F2 is as follows. The difference between the length of the spoke 4 that constructs the second wheel surface F2 and the length of the spoke 4 that constructs the first wheel surface F1 becomes relatively short.

Ultimately, the pitch circle diameter (D ₁ ) drawn by the hub side spoke hole 224 formed in the first hub flange 222L and the pitch circle diameter drawn by the hub side spoke hole 224 formed in the second hub flange 222R. By finely adjusting (D ₂ ), the lengths of the spokes 4 constituting the wheel surfaces F1 and F2 can be made the same. The hub 2 designed in this way is the hub of the present invention.

  If the lengths of the spokes 4 arranged on the first wheel surface F1 and the second wheel surface F2 are the same, it is not necessary to prepare two types of spokes, and workability is improved.

  The present invention can be implemented in various other forms without departing from the spirit or main features thereof. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

1 Wheel of the present invention (spoke wheel)
2 Hub 21 Hub shaft 22 Hub shell 221 Hub shell body 222L First hub flange 222R Second hub flange 224 Spoke hole 23 Free hub body 231 Spline 24 Bearing 25 Bearing 26 Ratchet 27 Lock nut 3 Rim 31 Rim side spoke hole 4 Spoke 41 Elbow 42 Head 43 Screw part 5 Nipple 10 The present invention bicycle (bicycle)
F1 first wheel surface F2 second wheel surface

Claims (7)

A hub,
With the rim,
A plurality of spokes stretched between the hub and the rim;
A spoke wheel comprising:
The hub is provided with a hub offset in which the center of the flange interval and the distribution center of the distance between the lock nuts are not matched.
The first hub flange existing on the offset direction side of the hub and the second hub flange on the opposite side of the hub in the offset direction are each formed with a plurality of spoke holes for attaching one end of the spoke,
From the number of spokes that are stretched between the first hub flange and the rim to construct the first wheel surface, the second wheel surface is stretched between the second hub flange and the rim. A spoke wheel characterized by a large number of spoke intersections. The spoke wheel according to claim 1,
When the number of spoke intersections that construct the first wheel surface is two intersections, the number of spoke intersections that construct the second wheel surface is three or four intersections,
The spoke wheel in which the number of spoke intersections constructing the second wheel surface is four intersections when the number of spoke intersections constructing the first wheel surface is three. The spoke wheel according to claim 1 or 2,
A spoke wheel in which the pitch circle diameter of the spoke holes provided in the second hub flange is larger than the pitch circle diameter of the spoke holes provided in the first hub flange. The spoke wheel according to claim 3,
A spoke wheel in which the outer diameter of the second hub flange is larger than the outer diameter of the first hub flange. The spoke wheel according to any one of claims 1 to 7,
A spoke wheel in which the length of the spoke that constructs the first wheel surface is the same as the length of the spoke that constructs the second wheel surface.   A hub used for the spoke wheel according to claim 5. A bicycle comprising the spoke wheel according to any one of claims 1 to 5.

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