JPH06143902A - Spoke wheel - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a spoke wheel with improved assembly workability and high productivity. [Structure] A mounting flange is provided on the inner periphery of the rim so as to project in the circumferential direction, and a plurality of nipple seats 12 are provided so as to project on the hub 3 in the circumferential direction. One end of the spoke 4 is engaged and fixed, and the other end of the spoke 4 is passed through a circular hole 13 formed in each of the nipple seats 12 and is fixed by a nipple 14 to fix each spoke 4 to the nipple 14. At the tightening action point P, the tangential line T drawn to the pitch circle C of the nipple seat 12 is tilted radially inward by a predetermined angle α. According to the present invention, a tool such as the impact driver 15 can be tilted in the same direction as the spokes 4 to work, and interference with the spoke wheels (particularly the hub 3) of the impact driver 15 can be avoided. The tightening work is performed with good workability using the impact driver 15, and high productivity of the spoke wheel is secured.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to spoke wheels, particularly for tubeless tires.

[0002]

2. Description of the Related Art Generally, a spoke wheel is constructed by connecting a rim and a hub with a plurality of spokes to form a single spoke wheel. Conventionally, one end of the spoke is engaged and fixed in a hole formed in the hub, and the other. The end was passed through a hole formed in the rim and clamped with a nipple.

However, when it is attempted to mount a tubeless tire on such a spoke wheel, it is not possible to complete the seal between the holes formed on the rim and the spokes, which is impossible.

Therefore, a mounting flange is integrally provided on the inner circumference of the rim in the circumferential direction, one end of the spoke is engaged with and fixed to a hole formed in the mounting flange, and the other end of the spoke is fitted with a nipple. A spoke wheel for a tubeless tire is proposed, which has a structure in which the hub side is tightened and fixed.

[0005]

However, in the spoke wheel described above, since the nipple must be tightened on the hub side having a small diameter, an automatic feeding device such as a nipple feeder and a tightening tool such as an impact driver. However, there is a problem in that the work due to is extremely difficult or impossible, and it is necessary to rely exclusively on manual work, and high mass productivity cannot be secured.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a spoke wheel having improved assembling workability and ensuring high mass productivity.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a mounting flange provided on an inner circumference of a rim so as to project in the circumferential direction.
A plurality of nipple seats are provided on the hub in the circumferential direction, one end of each spoke is engaged with and fixed to a hole formed in the mounting flange, and the other end of the spoke is formed in the nipple seat. A spoke wheel is formed by inclining each of the spokes through a bored hole and fastening it with a nipple, and inclining each spoke radially inward with respect to the tangent line drawn to the pitch circle of the nipple seat at the tightening point of the nipple. It is characterized by

[0008]

According to the present invention, each of the spokes is clamped and fixed to the nipple seat projecting on the hub side by the nipple, and the spoke (that is, the hole formed in the nipple seat) is tightened by the nipple. At the point (the point where the tightening tool engages the nipple), it is inclined at least inward in the radial direction with respect to the tangent line drawn to the pitch circle of the nipple seat (the circle that passes through the tightening point of the nipple), so the nipple feeder, etc. It is possible to incline the tightening tools such as the automatic feeding device and the impact driver in the same direction, and avoid the interference of these devices and tools with the spoke wheels. Therefore, the work of tightening the nipple is performed with good workability using the above-mentioned device and tool, and high productivity of the spoke wheel is secured.

Further, by arranging the spokes so as to be inclined as described above, the torsional rigidity of the spoke wheel in the rotational direction is enhanced, and the spoke wheel can sufficiently cope with the recent improvement in tire performance and braking performance. .

In the spoke wheel according to the present invention, the spoke is fixed to the rim side with respect to a mounting flange projectingly provided on the inner periphery of the rim, and a rim portion (rim body) to which the tire is mounted. Since no hole processing is performed on the spoke wheel, even if a tubeless tire is attached to the spoke wheel, no problem of sealing property occurs.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view of a spoke wheel according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the spoke wheel, FIG. 3 is an enlarged detail view of a portion A of FIG. 1, and FIG. FIG. 5 is a partial plan sectional view of the wheel, and FIG. 5 is an explanatory view showing the positional relationship between the inclination of the spoke and the tightening tool.

The spoke wheel 1 according to this embodiment is for a front wheel of a motorcycle, and it has a large-diameter ring-shaped rim 2.
And a small-diameter hub 3 located at the center thereof are connected and integrated by 32 spokes 4 ... Then, a front wheel 6 of the motorcycle is constructed by mounting a tubeless tire 5 on the rib 2 of the spoke wheel 1, and the front wheel 6 passes through a front axle 7 which is inserted into the hub 3 as shown in FIG. It is rotatably supported on the lower part of the front forks 8, 8.

By the way, eight mounting flanges 9 ... Are integrally provided at the center of the inner circumference of the rim 2 of the spoke wheel 1 in the circumferential direction at an equal angular pitch. And
Each mounting flange 9 has a pair of circular holes 1 of different sizes
4 sets of 0 and 11 (see FIG. 3) are drilled,
For all the mounting flanges 9 ... A total of 32 sets of circular holes 10, 11, ... Are provided as many as the spokes 4 ...
The rim 2 is integrally cast from a light alloy such as an aluminum alloy.

On the other hand, eight nipple seats 12 ... Are integrally formed at the left and right ends of the hub 3 in the axle direction at equal angular pitches in the circumferential direction, and each nipple seat 12 has two circles. The holes 13 and 13 are formed so as to be inclined inward and outward in the vehicle width direction by a predetermined angle. Therefore, for a total of 16 nipple seats 12, a total of 32 circular holes 13 ... It is installed throughout. The hub 3 is also integrally cast from a light alloy such as an aluminum alloy like the rim 2.

In assembling the spoke wheel 1, each spoke 4 is passed through the circular hole 10 on the rim 2 side and the circular hole 13 on the hub 3 side and temporarily fixed. That is, one end (one end on the rim 2 side) 4a of each spoke 4 is bent into an L-shape as shown in FIG. 4, and a large-diameter head 4b is formed at the tip thereof. The head portion 4b is set to a size such that a large-diameter circular hole 10 formed in each mounting flange 9 of the rim 2 can pass through, but a small-diameter circular hole 11 cannot pass through. or,
The other end of the spoke 4 (the end on the hub 3 side) is provided with a screw (not shown).

First, one end (one end on the hub 3 side) of each spoke 4 is passed through a circular hole 13 formed in the nipple seat 12 of the hub 3, and the nipple 14 is supplied by a nipple feeder (not shown). This is the circular hole 13 of the nipple seat 12.
And the nipple 14 is temporarily assembled to the circular hole 13. After that, the other end of each spoke 4 (one end on the rim 2 side)
The head 4b formed at the tip of 4a is passed through the large-diameter circular hole 10 of the mounting flange 9, and finally the head 4b of the spoke 4 is formed.
The spokes 4 are temporarily fixed between the rim 2 and the hub 3 by engaging the shafts (parts bent in an L shape) 4b other than the above with the small diameter circular holes 11.

Thereafter, the same operation as described above is repeated for all the spokes 4 ...

When the temporary assembly is completed, the rim 2
With the hub 3 and the hub 3 positioned and fixed, each nipple 14 is tightened by the impact driver 15 shown in FIG. 5, and this tightening operation is performed on all (32) nipples 12 ... Are connected and integrated by 32 spokes 4 ... And the assembling work of the spoke wheel 1 is completed here.

By the way, in this embodiment, as shown in FIG. 5, each circular hole 13 formed in each nipple seat 12 is formed.
At the tightening point P of the nipple 12 (the point where the impact driver 15 engages the nipple 14) P, the pitch circle of the nipple seat 12 (the circle centered on the axis O passing through the tightening point P) C The drawn tangent line T is tilted inward in the radial direction by a predetermined angle α in a side view. Also, the same circular hole 13
As shown in FIG. 4, is inclined inward in the vehicle width direction by a predetermined angle β with respect to the tangent T in plan view.

Therefore, as shown in FIG. 5, each spoke 4
Is inclined inward in the radial direction by the angle α with respect to the tangent T in a side view.

By tilting the spokes 4 as described above, the impact driver 15 can be tilted in the same direction as shown in FIG. 5 to work, and the spoke wheel 1 of the impact driver 15 (particularly the hub) can be operated. (3 part) is avoided, the work of tightening the nipples 14 ... Is performed with the impact driver 15 with good workability, and high productivity of the spoke wheel 1 is secured. The nipple 14 ...
High workability is obtained even in the temporary assembling work, and high productivity of the spoke wheel 1 is secured.

If the spokes 4 are inclined and arranged as described above, the return rigidity in the rotational direction of the spoke wheel 1 is enhanced, and the spoke wheel 1 sufficiently copes with the recent improvements in tire performance and braking performance. be able to.

In the spoke wheel 1 according to the present invention, the spokes 4 ... Are fixed to the rim 2 side with respect to the mounting flanges 9 ... Since no hole is formed in the rim 2 portion (main body portion of the rim 2) to be formed, even if the tubeless tire 5 is attached to the spoke wheel 1, no problem of sealing property occurs.

By the way, in the spoke wheel 1, as shown in FIG. 2, ring-shaped brake discs 16 and 16 are attached to both end faces of the hub 3, and the brake discs 16 and 16 are connected to the front fork 8. , 8 together with the calipers 17, 17 attached to the disk brakes 8, 8.

Here, modified examples of the first embodiment are shown in FIGS. 6 and 7.

That is, FIG. 6 is a side view of the hub 3, and FIG. 7 is a front view of the hub 3. In this example, a reinforcing ring 18 for reinforcing the nipple seats 12 ... Formed on the hub 3 from the inside.
Is provided.

FIG. 8 shows another modified example of the first embodiment. As shown in the drawing, if the two circular holes 13, 13 formed in each nipple seat 12 are vertically arranged in a staggered manner, the assembly is completed. Workability is further enhanced.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on 1.

9 is a longitudinal sectional view of the hub, and FIG. 10 is FIG.
11 is a view in the X direction of FIG. 9, and FIG. 11 is a view in the Z direction of FIG.

In the present embodiment, the hub 3 is provided with 8
Two nipple seats 12A ... Are projected in the circumferential direction at an equal angular pitch, and each nipple seat 12A has two circular holes 10,
10 is inclined by a predetermined angle and is pierced. Therefore, the circular hole 10 has a total of 1 for the eight nipple seats 12A.
Six are formed.

Eight rib-shaped nipple seats 12B ... Are integrally formed radially on the inclined side surface of the hub 3, and each nipple seat 12B has two circular holes 11, 1.
1 is tilted by a predetermined angle and is provided in a stepped manner in the radial direction and the width direction. Therefore, a total of 16 circular holes 11 ... Are formed for the eight nipple seats 12B.

As in the first embodiment, the spokes (not shown) are passed through the circular holes 10, ..., 11 ... And the nipple seats 12A.
It is fastened and fixed to B ... Also in this case, since each spoke is tilted similarly to the first embodiment, the same effect as that of the first embodiment can be obtained.

[0034]

As is apparent from the above description, according to the present invention, the mounting flange is circumferentially projected on the inner circumference of the rim, and the hub is provided with a plurality of nipple seats circumferentially projected. One end of each spoke is engaged and fixed to the hole formed in the mounting flange, and the other end of the spoke is passed through the hole formed in the nipple seat and tightened and fixed with the nipple. Since the spoke wheel is configured by inclining inward in the radial direction with respect to the tangent line drawn to the pitch circle of the nipple seat at the tightening point of the nipple, the workability of assembling the spoke wheel is improved and high mass productivity is achieved. The effect of being able to secure is obtained.

[Brief description of drawings]

FIG. 1 is a side view of a spoke wheel according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a spoke wheel according to the first embodiment of the present invention.

FIG. 3 is an enlarged detailed view of a portion A of FIG.

FIG. 4 is a partial plan cross-sectional view of the stake wheel according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing the positional relationship between the inclination of the spokes and the tightening tool.

FIG. 6 is a side view of a hub of a spoke wheel according to a modified example of the first embodiment of the present invention.

FIG. 7 is a front view of a hub of a spoke wheel according to a modified example of the first embodiment of the present invention.

FIG. 8 is a cross-sectional view of a spoke wheel hub according to another modification of the first embodiment of the present invention.

FIG. 9 is a side view of the hub of the spoke wheel according to the second embodiment of the present invention.

FIG. 10 is a view in the direction of arrow X in FIG.

FIG. 11 is a view in the Z direction of the arrow in FIG.

[Explanation of symbols]

1 Spoke Wheel 2 Rim 3 Hub 4 Spoke 9 Mounting Flange 10, 11 Circular Hole 12 Nipple Seat 13 Circular Hole 14 Nipple C Pitch Circle of Nipple Seat P Nipple Tightening Point T Tightening Pitch Circle C at Tightening Point P Tangent

Claims (1)

[Claims] 1. A mounting flange is provided on the inner circumference of a rim so as to project in the circumferential direction, a plurality of nipple seats are provided at the hub so as to project in the circumferential direction, and one end of each spoke is engaged with a hole formed in the mounting flange. And then fix the same, pass the other end of the spoke through the hole formed in the nipple seat, and fasten it with the nipple, and fix each spoke at the nipple tightening action point to the nipple seat pitch. A spoke wheel characterized by being inclined radially inward with respect to a tangent drawn to a circle.