JPH0616801Y2 - Motorcycle wheel mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a wheel mounting structure suitable for a vehicle such as a motorcycle having a cantilever type swing arm.

[Conventional technology]

FIG. 1 and FIG. 2 show a conventional example in which an axle on which wheels are mounted has a hollow shape. In an axle case 2 fitted to a cantilever type swing arm 1, an axle 4 and a axle 4 are provided via a bearing 3. An outer end portion 4 of an axle 4 that rotatably supports a wheel 5 mounted on the axle 4 and projects from a hub portion 5a of the wheel 5.
The wheel 5 is fixed by screwing the nut 7 onto the threaded portion 6 of a, and the cotter pin 9 is inserted into the pin holes 8 and 8 formed facing the outer end portion 4a to remove the nut 7. If the axle is a solid tube, a radial pin hole 11 is bored in the outer end 10a of the axle 10 as shown in FIG.
The cotter pin 9 is inserted into 1 to prevent the nut 7 from coming off.

[Problems to be solved by the invention]

However, in the former case described above, when the pin 9 is inserted into the pin hole 8, since the guide length by the pin hole 8 is short, the split pin 9 inclines as shown by the imaginary line in FIG. It is difficult to insert the cotter pin 9 into the pin hole 8, and in the latter case, the split pin 9 can be easily attached, but the axle 10
Since it is a solid tube, there is a disadvantage that the weight of the axle increases.

Therefore, an object of the present invention is to provide a wheel mounting structure in which the weight of the axle can be reduced and the cotter pin for retaining can be inserted quickly and easily.

[Means for solving problems]

The present invention has been made in view of the above-mentioned object, and is a wheel hub.
Nut on the outer end of the axle protruding from the
The cotter pin is inserted into the pin hole drilled at the end to prevent the nut from coming off.
In the mounting structure of wheels such as motorcycles,
The axle is made hollow and is mounted on the outer end of the axle
A ring body in which a pin guide is inserted into the outer end opening.
And is bridged to the ring body through the central axis of the ring body.
Ribs and penetrating through the ribs by opening to the outer peripheral surface of the ring
The guide hole formed and the ring body
A flange that abuts the end face of the outer end portion,
Insert the ring into the outer end of the axle where the
Attach the pin guide, and insert the pin hole of the axle end and the pin guide.
The feature is that the cotter pins are inserted by aligning with the rib holes.
It is what

[Action]

Therefore, although the axle is formed in a hollow shape to reduce the weight, the rib holes of the pin guide can smoothly guide the insertion of the split pin, and the split pin can be quickly and easily inserted.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 4 to 6.

An axle case 13 is attached to the rear end of the swing arm 12, and a rear axle 14 is inserted into the axle case 13.

The rear axle 14 is a stepped hollow shaft composed of a small diameter shaft portion 15a and a large diameter shaft portion 15b, and the rear axle shaft 14 is a small diameter shaft portion 1
By the ball bearings 16 and 16 externally fitted to the 5a and the needle bearing 17 externally fitted to the large diameter shaft portion 15b,
The axle case 13 is rotatably supported by the axle case 13.

A driven sprocket 18 is serration-fitted to a small diameter shaft portion 15a of the rear axle 14 protruding to one side of the axle case 13, and the sprocket 18 has a small diameter shaft portion 15a.
It is fixed by a nut 19 screwed to the outer end of the.

The large-diameter shaft portion 15b protruding to the other side of the axle case 13 is provided with a flange 20 for mounting a rear wheel.
A plurality of support pins 22 fixed by nuts 21 are provided on the flange 20 so as to project to the side opposite to the swing arm at equal intervals, and a rear wheel 23 is provided on the large-diameter shaft portion 15b on the support pin projecting side.
Is installed.

In the rear wheel 23, the mounting hole 26 in the hub portion 25 of the wheel 24 is externally fitted to the spacer 27 of the large-diameter shaft portion 15b, and the pin insertion hole 28 formed in the hub portion 25 is attached to the flange 2
0 is fixed to the support pin 22 and is protruded from the hub portion 25. The screw portion 2 on the outer periphery of the outer end portion 15c of the large diameter shaft portion 15b.
9, a nut 30 is screwed to the rear wheel 23 so as to be integrally rotatable with the rear axle 14, and the nut 30 is formed so as to face the outer end portion 15c of the large diameter shaft portion 15b. The pin holes 31 and 31 and the split pin 34 inserted into the guide hole 33 of the pin guide 32 attached to the outer end portion 15c prevent the slip-out.

Further, the nut 30 is a hexagonal body 30 for hanging a tool.
A flange 30b having a diameter larger than that of the body portion 30a is provided on one side of a, and a taper surface that engages with a taper surface 26a formed at the mouth end of the mounting hole 26 of the rear wheel 23 is provided on the outer peripheral surface of the flange 30b. 30c, the rear wheel 2 is provided by the pressure contact between the two tapered surfaces 26a and 30c which are engaged by the screwing of the nut 30.
3 can be fixed accurately and easily.

In the pin guide 32, two hollow ribs 32b, 32b passing through the central axis of the ring body 32 are bridged in a cross shape inside the ring body 32a inserted in the outer end portion 15c of the large diameter shaft portion 15b. A guide hole 33 is formed in the hollow rib 32b by opening to the outer peripheral surface of the ring body 32a and penetrating the hollow rib 32b.
The large-diameter shaft portion 15b is attached to the outer circumference on one side of the ring body 32a when mounted.
A flange 32c for abutting contact with the end surface 15d of the outer end portion 15c for positioning is provided.
Is made of a lightweight material such as plastic or aluminum.

Then, the ring body 32a of the pin guide 32 is inserted into the outer end portion 15c of the large-diameter shaft portion 15b, and the flange 32c is brought into contact with the end surface 15d of the outer end portion 15c. Next, the linear insertion portion 34a of the split pin 34 is inserted into one pin hole 31 of the outer end portion 15c, and the tip of the insertion portion 34a is attached to the ring body 3.
The pin guide 32 is slid around the center axis of the axle while being pressed against the outer peripheral surface of 2a, and when the guide hole 33 matches the pin hole 31, the insertion portion 34a of the split pin 34 is inserted into the guide hole 33 and the split pin 34 The circular arc-shaped hooking portion 34b is hooked on the screw portion 29 of the outer end portion 15c, whereby the split pin 34 is attached to the outer end portion 15c of the rear axle 14, and the nut 30 is retained.

Therefore, according to the present embodiment, although the rear axle is formed in a hollow shape to reduce the weight, the cotter pin can be quickly and smoothly inserted by the guide hole of the pin guide, and the nut can be retained. Therefore, if it is applied to a motorcycle for racing, for example, it will be effective in exchanging tires for a very short time.

[Effect of device]

As described above, according to the present invention, a rib passing through the center axis of the ring body is bridged to the ring body, and a guide hole that opens to the outer peripheral surface of the ring body is formed through the rib, and the outer peripheral portion of the axle is provided at the outer peripheral portion of the ring body. A pin guide provided with a flange that abuts against the end face of the axle is mounted by inserting the ring body inside the outer end of the hollow axle protruding from the nut that holds the wheel in place. Since the split pin was inserted by aligning the hole with the rib hole of the pin guide, the tip of the split pin insertion part inserted into the pin hole on the outer end of the axle is inserted into the outer end of the axle. By sliding the pin guide around the center axis of the axle while being pressed against the outer peripheral surface of the ring body of the guide, when the guide hole of the pin guide matches the pin hole, the insertion portion is inserted into the guide hole, Is the arc-shaped hooking part of the cotter pin hooked to the outer end? Can align with no guide hole and the pin holes that visual, made inserting the split pin to quickly and smoothly to the axle outer end portion, it is possible to retaining fit securely nuts.

[Brief description of drawings]

1 to 3 show a conventional example, FIG. 1 is a sectional view of a rear axle with rear wheels mounted, FIG. 2 is a sectional view taken along line II-II of FIG. 1,
FIG. 3 is a sectional view of another conventional example cut at the same position as in FIG. 2, FIGS. 4 to 6 show an embodiment of the present invention, and FIG. 4 is a rear axle with rear wheels mounted. FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIG. 6 is a perspective view of an end portion of a rear axle, a nut and a pin guide on a rear wheel mounting side. 12 ... Swing arm, 13 ... Axle case, 14 ...
Rear axle, 15a ... Small diameter shaft portion, 15b ... Large diameter shaft portion, 15c
... outer end part, 15d ... end face, 20 ... flange, 22 ... support pin, 23 ... rear wheel, 24 ... wheel, 25 ... hub part, 2
8 ... Pin insertion hole, 29 ... Screw part, 30 ... Nut, 31 ...
Pin hole, 32 ... Pin guide, 32a ... Ring body, 32b
... Hollow rib, 32c ... Flange, 33 ... Guide hole

Claims (1)

[Scope of utility model registration request] 1. A motorcycle in which a nut is screwed onto an outer end portion of an axle protruding from a hub portion of a wheel, and a split pin is inserted into a pin hole formed in the outer end portion to prevent the nut from being pulled out. In a wheel mounting structure, the axle is formed in a hollow shape, and a pin guide attached to an outer end of the axle is inserted into the opening of the outer end, and a central axis of the ring is attached. Through which the ribs are bridged, a guide hole that is formed in the outer peripheral surface of the ring body and penetrates through the ribs, and a rib that projects from the outer peripheral portion of the ring body and abuts the end surface of the outer end portion. The ring guide is inserted into the outer end of the axle where the nut is screwed, and the pin guide is attached to align the pin hole at the end of the axle with the rib hole of the pin guide. A wheel mounting structure for a motorcycle, characterized in that a split pin is inserted.