JPS582842B2 - spoke wheels - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a spoke that can be assembled to a hub extremely easily and reliably, can maintain its original state for a long time, and is easy to manufacture. Insert the center of. This relates to a spoked wheel consisting of a hub which is penetrated through the hub and which can be screwed onto the rim at both ends.

Conventionally, the spokes of automobiles, bicycles, motorcycles, etc.
Usually, as shown in FIGS. 1 and 2, the steel material is attached from the peripheral edge of the hub 2 to the rim 3 at a predetermined angle in the radial direction, and is then cut to a predetermined size. At the side (left side in this case) bending part 4, the tip is bent at a specified angle α, and from this bending part 4, the tip is subjected to a head suspension to form the head 5, the root of the head 6, and the contact part 7 in order. On the side (right side in this case), a threaded portion 8 to be inserted and screwed into the rim 3 side is formed by wrapping rolling, and the portion to the left of the bent portion 4 and excluding the threaded portion 8 is formed into a filament. The shaft part 9 is finished in a straight line.

When the spoke 1 having the above-mentioned configuration is stretched between the hub 2 and the rim 3, the head 5, the base of the head 6, and the contact part 7 are referred to as the fitting part A. When inserting and fixing the fitting part A into the hole 10, inserting the threaded part 8 into the spoke hole of the rim 3, and screwing it together with nipples (none of which are shown), the tightening direction and the linear axis shown by the arrows are When the axis line X-X of the portion 9 coincides, the bent portion 4 is displaced to the position shown by the broken line as shown in FIG. 4 and receives tension, and as shown in FIG. When the filamentous shaft portion 9 is displaced and stretched to the position indicated by the broken line through the bending point t, and furthermore, in FIG. It will be displaced and stretched into position.

The spokes shown in FIGS. 4 and 6 are at the base of the head 6, and the spokes shown in FIG. 5 are at the inflection point t.
This is the hub 2 of the spoke 1.
During assembly, a tensile load is first applied to the bent portion 4 and then transmitted to the head 5, but it is assumed that stress is concentrated on the bent portion 4 and the base of the head 6 during the transmission. It is being

Therefore, the spokes 1 should be manufactured so that the tensile load is not particularly concentrated on the head root 6, but at present there is still no method of manufacturing that satisfies this condition.

Therefore, this invention has made a complete improvement on the spoke, which considered it essential to form a bent part as described above, and now has threaded parts at both ends and a fitting shaft in the center. While the spokes are made of a material made of steel, a fitting hole is formed through the center of the spoke, and a protruding piece is protruded from the outer periphery with a predetermined gap. To provide a spoked wheel which is configured with a pub, thereby preventing the spokes from breaking, preventing the spokes from loosening, and further reducing the occurrence of wheel runout.

Embodiments of the present invention will be described below with reference to FIGS. 7 to 12. First, in FIGS. 7 to 9, a hub is provided with a hub hole 11 that penetrates and supports a rotating shaft (not shown) in the center. A suitable number (seven in this case) of protruding pieces 12 are integrally protruded and formed along the outer circumferential edge of H at predetermined intervals C in the outer radial direction, and each of these protruding pieces 12 has a shape on the outer circumferential edge. A pair of fitting holes n1 in the tangential direction are aligned with the hub center line v-v.
A fitting shaft 13 is formed in the center to penetrate and carve symmetrically around the fitting hole n1, and to fit into each of these fitting holes n1.
Axis portions 14 each having a circular cross-section with a slightly smaller diameter on both sides.
, 14 are provided with threaded portions 15, 15, respectively, at both ends of the spoke S1 made of flexible steel wire.
15 to the nipple 17 fixed to the trop 16 of the rim R.
The spoke wheel W shown in FIG. 7 is constructed by screwing into and tightening the spoke wheel W.

The overall length of the spokes S is formed to be shorter than the inner diameter d of the rim H, and the insertion hole n1 through which the projection piece 12 can still pass is inclined in a three-dimensional direction with respect to the rim R.

In another embodiment shown in FIG. 10, the spoke S2
The fitting shaft 23 at the center of the spoke extends linearly with either side of both axis lines 24, and is bent at a predetermined angle at one end of the fitting shaft 23 at the center, so that the entire spoke S2 is approximately "
This embodiment differs from the straight-line shaped spoke S1 in that it is shaped like a ``h'', but is otherwise the same and is rounded.In the figure, 22 is a protruding piece.

In addition, in FIG. 9, there are separate protruding pieces 32, 3 on the left and right (front and back in FIG. 7) centering on the center line v-v of the hub.
3 are protruded and formed only on the same side every other time on the outer circumferential edge of the hub H, and arranged as shown in FIG. It is also possible to fit the spokes S3 and S4 into the spokes.

In this case, an even number of protrusions are set in total.

In this invention, for example, in the first embodiment, one threaded part 15 at the end of the spoke S1 is passed through the fitting hole n1 of the projection piece 12, and this threaded part 15 faces the nipple 17, while By fitting and fixing the mating shaft 13 into the fitting hole n1 of the protruding piece 12, and screwing and tightening the threaded portions 15, 15 at the ends into the nipples 17, 17, respectively, the spokes S1 are connected to the hap H and the rim R. The wheels W assembled to the respective wheels are constructed as shown in FIG.

Therefore, when assembling the spoke S1 to the hub H, there is no need to insert and fix the bent part formed at one end of the wire into the spoke hole of the hub as in the conventional method, and the installation is simple and easy. This is possible, and there is no need to bend the spoke material itself; all you need to do is form a fitting part in the center that fits into the fitting hole of the protruding piece, and a threaded part at each end. In addition, the production of spokes is significantly simpler than that of conventional hubs, and even when used repeatedly after the spokes have been assembled to the hub, there is no possibility that the tips of the spokes will loosen from the spoke holes of the hub or become severely damaged. If the hub is still on the hub, a suitable number of protrusions are formed with a predetermined gap on the outer periphery, and these protrusions are In the drilled insertion hole,
By fitting and penetrating the fitting portion at the center of the spoke, it is possible to prevent twisting and damage caused by torque applied to the center of the spoke, and therefore, the occurrence of wheel runout can be reduced. Furthermore, it is durable for long-term use, and it is more economical from a material standpoint because it suffices to use a material with a lower rigidity than that required for conventional spokes. The single supported steel wire performs the function of two conventional spokes, and it evokes a completely different concept in the viewer from conventional spoked wheels, fully demonstrating the beauty of the wheel's design. It should be said.

In addition, a male screw is carved into the fitting part at the center of the spoke, and a female screw that is screwed into the male screw is carved into the fitting hole of the protruding piece, respectively, so that the center of the spoke is screwed and fixed into the fitting hole of the protruding piece. It can also be adopted.

[Brief explanation of drawings]

Figure 1 is a front view showing an overview of the assembled state of the spokes;
Figure 3 is a front view of the conventional spoke; Figures 4, 5, and 6 are sectional views of main parts showing how they are attached to the hub; Figure 7 is the spoke according to the present invention. Partially cut away longitudinal sectional front view of a wheel equipped with such spokes and hub, No. 8
The figure is a y-y cross-sectional view of Fig. 7, and Fig. 9 is a Z-Z cross-sectional view of Fig. 7.
A line sectional view, FIG. 10 is a side view of another embodiment of the spoke,
FIG. 11 is a plan view of essential parts showing another assembled state of the hub and spokes, and FIG. 12 is a sectional view taken along line 1-1 in FIG. 11. H...Hub, R...Rim, S1, S2
, S3, S4... Spoke, 12, 22, 32
, 33... Protrusion piece, 13, 23... Fitting shaft, 15.25... Threaded part, n1', n2.
...Insertion hole.

Claims (1)

[Claims] 1 In a spoked wheel with spokes stretched between a rim and a hub, the spokes have a fitting part in the center and are made of steel wire with threaded parts at both ends, and the hub has a predetermined shape on the outer periphery. It has an appropriate number of protruding pieces that protrude in the outer radial direction at intervals, and a fitting hole is provided that passes through the protruding pieces in a tangential direction, and the fitting part of the spoke is fitted into the fitting hole. A spoked wheel is constructed by fastening the threaded portions of the spokes to the rim.