JPH0639502U - Wire spoke wheel - Google Patents

Abstract

(57) [Summary] [Structure] A wire in which the base end portions of the wire spokes 20 are connected to the hub 2, the tip portions of the wire spokes 20 are connected to the rim 10, and the hub 2 and the rim 10 are connected by the wire spokes 20. In the spoke type wheel, the wire spoke insertion hole 17 is provided on one side surface of each of the inner diameter side surfaces 15 and 16 of the rim 2, and the locking hole 18 is provided on the other side surface, and the head portion 22 of the tip end of the wire spoke 20 is rimmed. A wire-spoke wheel adapted to be locked from the inside of the above locking hole 18. [Effect] When the heads of wire spokes are attached to the rim, the head is hidden inside the convex wall surface of the rim inner diameter, and the head is not exposed outside the convex wall surface, improving the appearance. Also, since the tip of the wire spoke is engaged and held by the locking hole and the head portion on the side wall surface of the rim, the tension is supported by the entire side wall of the convex portion, and the rigidity of the wire spoke rim connecting portion is increased. Can be kept high.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wheel for connecting a rim and a hub with wire spokes, and relates to an improvement in a connecting structure between the wire spokes and the rim.

[0002]

[Prior art]

 Wheels in which the rim and the hub are connected by wire spokes are disclosed in Japanese Utility Model Publication Nos. 59-192401 and 59-35101. In the technique of Japanese Utility Model Laid-Open No. 59-192401, a ridge is provided on the inner rim of the rim, a locking hole is provided in the wheel axial direction, and the front end of the wire spoke is connected to the hub at the base end. The locking head is provided by bending it into an L shape, and the locking head is exposed on one side surface of the ridge and is connected to the rim ridge through the locking hole.

The technique disclosed in Japanese Utility Model Application Laid-Open No. 59-35101 discloses that a box-shaped convex portion having a closed cross section is provided in the inner diameter portion of the rim, and a long hole is provided in the bottom portion of the inner diameter of the convex portion in the circumferential direction. In the middle part of the hole, insert the wire spoke head through the hole, and move the wire spoke head along the slot in the circumferential direction. The head is locked and the wire spoke tips are connected to the rim.

[0004]

[Problems to be solved by the device]

 The above conventional techniques have the following problems. That is, according to Japanese Utility Model Laid-Open No. 59-192401, the heads of the wire spokes are exposed on the outer surface of the rim inner diameter portion on one side of the ridges, which is not preferable in terms of appearance. Especially, when used for a wheel of a motorcycle. The wheel is also an important element as an external part, and if the heads of the wire spokes are exposed on the outer surface of the conspicuous wheel rim, the appearance will deteriorate.

On the other hand, in the technique disclosed in Japanese Utility Model Laid-Open No. 59-35101, it is necessary to form a long slot in the inner circumferential portion of the rim in the circumferential direction, which increases the number of processing steps and increases the tensile force. Providing a long notch-shaped long hole in the bottom surface of the inner diameter portion of the rim to be worked leads to a reduction in rigidity, and there is a possibility that the weight increases due to the reinforcement.

The present invention has been made to solve the above problems, and the object thereof is to easily attach the wire spokes and to maintain the rigidity of the connecting portion between the rim and the wire spoke high. The object is to provide a wire-spoke wheel that can be improved in appearance.

[0007]

[Means for Solving the Problems]

 The means for solving the above problems is to provide an insertion hole for a wire spoke on one side surface of each side surface of the rim and a locking hole for the other side surface, and to attach the head of the tip end of the wire spoke to the rim of the rim. It is a wire-spoke wheel that is locked from the inside of the locking hole. A box-shaped convex portion with a closed cross section is provided on the inner diameter portion of the rim, the insertion hole is symmetrically provided on one side surface of the convex portion, and the locking hole is symmetrically provided on the other side surface. The head has a substantially L-shaped bent portion, and the wire spoke is configured to be inserted from the insertion hole on the side surface of the rim, pulled out through the locking hole, and the head is locked from the inside of the locking hole. It is a wire-spoke wheel.

[0008]

[Action]

 According to the above means, the wire spoke is inserted from the large insertion hole on one side surface of the rim inner diameter portion, pulled out from the other side surface side through the locking hole, and the head of the tip portion is engaged from the inside side of the locking hole. Since it is stopped, the head is not exposed on the outer side surface of the rim inner diameter portion, while the wire spoke tips are supported on the rim side by the side wall of the convex portion of the rim.

[0009]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 is a vertical side view of a wheel according to the present invention, FIG. 2 is an enlarged vertical side view of a rim, FIG. 3 is a front view of a portion of a wheel, and FIG. 4 is an enlarged vertical side view for explaining insertion of wire spokes into a rim. It is a figure.

In FIG. 1, reference numeral 1 denotes a wheel, which is composed of a hub 2 and a rim 10, and a large number of wire spokes 20 ... Which connect the hub 2 and the rim 10. The hub 2 is provided with an axle support portion 4 having an axle support hole 3 in the center thereof, and at one end side in the axial direction of the axle support portion 4 is a drum-shaped support flange portion 5 to which a sprocket 10 is attached in the embodiment. A drum-shaped flange portion 6 is integrally provided on the other end side in the axial direction, and a wheel damper insertion space portion 7 which is opened in the axial direction is opened on the outer peripheral end surface of the axle support portion 4 on this side. Is provided.

At the outer peripheral portions of the drum-shaped flange portions 5 and 6 provided on both sides of the hub 2 in the axial direction and bulging in the radial direction, mounting holes 8 of the wire spokes 20 ... Are circumferentially arranged at a predetermined pitch. The mounting holes 8 are radially provided so as to pass through in the radial direction, and the base end portions of the wire spokes are fitted from the outside in the radial direction of the flange portion of the mounting hole 8 to the inside in the radial direction of the flange portion. The headed nut member 24 is screwed into the threaded portion formed at the tip of the wire spoke, and the lock nut 25 is screwed into the outside to fix the tip to the hub 2 side.

The rim 10 includes left and right ear piece portions 11, 11, a bottom piece portion 12 that connects the left and right ear piece portions 11, a drop portion 13 that is provided in an intermediate portion of the bottom piece portion 12 and that dives inward in the radial direction, and a radial direction of the drop portion 13. The convex portion 14 is provided on the inner side and protrudes inward in the radial direction. As shown in FIGS. 1, 2, and 4, the convex portion 14 has a large width in the axial direction, is curved and bulges inward in the radial direction, and a space portion S is formed inside the convex portion 14 to form a closed cross section. It is box-shaped, and the upper portion of the convex portion 14 is defined by the bottom wall of the drop portion 13, and there is no hole or the like in the portion other than the air injection valve (not shown) of the rim outer diameter portion.

The above-described convex portion 14 of the rim inner diameter portion is provided in a ridge shape over the entire circumference of the rim inner diameter portion, and the left and right wall surfaces 15 and 16 (both axial side wall surfaces) of the convex portion 14 will be described below. Make a hole through the wall. 1, 2 and 4, a large insertion hole 17 is axially penetrated and installed in the wall surface 15 on the right side of FIG. 1, and the insertion hole 17 is formed on one side surface of the annular convex portion 14 as shown in FIG. In the embodiment, a large number of two holes are provided radially at a predetermined pitch, and in the embodiment, large circular holes are formed as shown in FIG.

1, 2 and 4, on the left side wall surface 16, axially penetrate and install small locking holes 18 so as to be concentric with each of the insertion holes 17 ... As with the insertion holes 17, a plurality of the locking holes 18 are radially provided at a predetermined pitch as a set of two. As shown in FIG. 3, the locking holes 18 and the insertion holes 17 are formed as a set of two, one on each of the wall surfaces 15 and 16 and two on the one side 17 and then the other 18 on the two sides in the circumferential direction. Two wall surfaces 15 and 16 are provided with two locking holes 18 and two insertion holes 17 alternately. Alternatively, the holes 17 and 18 may be provided alternately one by one.

The above-described locking holes 18 are sufficiently smaller than the insertion holes 17 and have a diameter slightly larger than the shaft portions 23 of the wire spokes 20, and the L-shaped bent portions 21 of the tip portions of the wire spokes 20. It is set to be sufficiently smaller than the locking head 22 having a large diameter formed at the tip. In the embodiment, both end portions of the locking hole 18 in the axial direction are countersunk to form the dish-shaped surfaces 19, 19.

As described above, the wire spoke 20 is provided with a bolt-shaped screw portion at the base end, an L-shaped bent portion 21 is formed at the front end, and a thick disk-shaped locking head at the tip. Forming the part 22, the shaft part 23 has an elongated rod shape, and a predetermined number of such wire spokes 20 are prepared.

In the above, the wire spokes 20 ... Are attached as follows. The base ends of the wire spokes 20 are inserted through the insertion holes 17 in the side wall surface of the rim 10 to pass through the space 15, pass through the locking holes 18 provided symmetrically, and are led out to the outside of the wall surface. The L-shaped bent portion 21 shown by the solid line A in FIG. 4 and provided with the locking head 22 at the tip portion thereof passes through the space S because the insertion hole 17 is sufficiently large, and this is imagined in FIG. It is shown by the line B. In the wire spoke 20, the bent portion 21 and the locking head 22 are free in the space S, the shaft portion 23 is directed downward, and the wire spoke 20 is sequentially pulled out to pass the bent portion 21 through the locking hole 18 portion. Since the locking hole 18 is formed slightly larger than the diameter of the shaft portion 23 as described above, the bent portion 21 passes through the locking hole 18, and this is shown by an imaginary line C in FIG.

After that, the base end portions of the wire spokes 20 are inserted into the above-described mounting holes 8 of the hub 2 and fixed by the nut member 24 and the lock nut 25 as described above, and the tip end portion is the locking head portion. 22 is inside the space 15 of the convex portion 14, the large-diameter locking head portion 22 is caught on the inner end surface of the hole from the back side of the wall surface of the locking hole 18, and the bent portion 21 faces the outside of the wall surface and the shaft portion. 23 extends in the direction of the hub 1 and is fixed to the hub 2 side. The tension of the wire spokes 20 is adjusted by the nut members 24, and thus the wire spokes 20 ... Are stretched between the rim 10 and the hub 2. The attached state of the wire spokes 20 is shown enlarged in FIG.

[0019]

[Effect of device]

 As is clear from the above, according to the present invention, large insertion holes and locking holes that are slightly larger than the wire spoke shafts are symmetrically provided on the axially opposite wall surfaces of the rim projection, and the tip is bent. The wire spokes, which have heads larger than the locking holes at the tip, are inserted into the insertion holes and locking holes so that they can be locked. The part is hidden inside the convex wall surface of the rim inner diameter portion, and the head is not exposed to the outside of the convex wall surface, improving the appearance. In particular, the head is hidden in the wall surface of the convex portion, and an insertion hole on the side opposite to the head appears on the wall surface, which becomes a pattern as a part of the rim, further improving the appearance.

Further, since the wire spokes are configured such that the tip portions are engaged and held by the locking holes and the head portion on the side wall surface of the rim, the tension is supported by the entire side wall of the convex portion. Unlike the type in which a long hole is provided in the inner diameter part and it is supported on the bottom surface of the rim inner diameter, or it is supported by a ridge with a narrow solid width, the rigidity of the wire spoke rim connection part can be maintained high and the mounting rigidity of the wire spoke can be improved. Highly practical wire-spoke wheels can be obtained.

Furthermore, since the hollow ridge is formed on the rim, and large and small holes are symmetrically formed on both sides of this ridge, the rim can be easily formed by casting or the like, which is easy in terms of rim formation. As described above, the present invention has a great effect in that it is possible to manufacture a wheel having high rigidity and good appearance in a cost-effective manner.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a wheel according to the present invention.

[Fig.2] Enlarged vertical section side view of rim

FIG. 3 is a front view of a part of the wheel

FIG. 4 is an enlarged vertical side view illustrating insertion of wire spokes into a rim.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wheel, 2 ... Hub, 10 ... Rim, 14 ... Convex part, 15, 16 ... Wall surface of a convex part, 17 ... Insertion hole, 1
8 ... Locking hole, 20 ... Wire spoke, 21 ... Bent part, 22 ... Head part, S ... Hollow space part of convex part.

Claims (3)

[Scope of utility model registration request] 1. A wire spoke wheel in which a base end of a wire spoke is connected to a hub, a tip end of the wire spoke is connected to a rim, and the hub and the rim are connected by a wire spoke. An insertion hole for the wire spoke is provided on one side surface, and a locking hole is provided on the other side surface, so that the head portion of the tip of the wire spoke is locked from the inside of the locking hole of the rim. Wire spoke type wheel. 2. The rim of the rim is provided with a box-shaped convex portion having a closed cross section, and the insertion hole is symmetrically provided on one side surface of the convex portion and the locking hole is symmetrically provided on the other side surface. Wire-spoke wheel. 3. The wire spoke has a substantially L-shaped end portion.
Equipped with a bent head in the mold, the wire spoke is inserted from the insertion hole on the side of the rim, pulled out through the locking hole,
The wire-spoke wheel according to claim 1, wherein the head is locked from the inside of the locking hole.