JP2000024962A - Rear wheel kickstand for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and reliably make an adjustment in response to a recess/ projection of the grounding surface. SOLUTION: A long hole 39 long in the vertical direction is arranged in the upper part of a lift arm 21 of a rear wheel kickstand, and a slider 33 and an engaging pin 30 are installed on a bolt 31 inserted into this. The lower part of the slider 33 abuts to the head part 37 of an adjusting screw 36 adjustably installed in the support projection part 35 arranged on the lower lift arm 21, and when the adjusting screw 36 is vertically moved, the slider 33 moves to also move the engaging pin 30 integrally formed with this. The engaging pin 30 of left/right lift arms 21 can be respectively, separately and precisely adjusted to a recess/projection of the grounding surface since a height can be respectively and independently freely adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle rear wheel maintenance stand for use when replacing a rear wheel from the rear of a vehicle body.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open No. 4-1044791 discloses an automatic
In order to support the rear part of the wheel, a rear wheel maintenance stand having a substantially L-shape in side view is shown. This rear wheel maintenance stand has a pair of left and right lift arms that support the rear parts of the left and right rear swing arms, and each lift arm is composed of inner and outer pipes that are telescopically fitted, and each is formed in the length direction. The length can be freely adjusted by inserting a bolt by aligning any one of the plurality of bolt insertion holes.

[0003]

Generally, there is no problem if the ground contact surface is flat when the rear wheel of the motorcycle is maintained.
If there are irregularities, it is desirable to adjust the length of the left and right lift arms in the rear wheel maintenance stand so that the height of the vehicle body support point coincides with the left and right.

In the case of the above-mentioned conventional structure, it is necessary to adjust the length of the left and right lift arms before being supported by the rear wheel maintenance stand. Because, in such a bolt insertion type adjustment mechanism, when the bolt is removed, the upper pipe becomes free, so it is necessary to set up the rear wheel maintenance stand and adjust the length of one support arm For example, it is necessary to support the vehicle body by another means so that a load is not applied to the lift arm, and such a work is difficult in practice.

In addition, the interval between the bolt push holes is naturally limited due to the necessity of maintaining the strength of the pipe, so that the adjustable length becomes coarse, and it is not possible to properly cope with the unevenness of the grounding surface. Accordingly, an object of the present invention is to provide an adjustment mechanism that facilitates height adjustment of the left and right lift arms and appropriately copes with a change in unevenness of a ground contact surface.

Further, when quick rear wheel replacement is required for racing or the like, positioning of the rear wheels with respect to the vehicle body must be easy. Therefore, it is another object of the present invention to provide a structure capable of facilitating the work by facilitating the positioning.

[0007]

Means for Solving the Problems To solve the above problems, a first invention of a rear wheel maintenance stand for a motorcycle according to the present invention is directed to a pair of left and right rear swing arms that support the rear wheel with the rear wheel interposed therebetween. The left and right lift arm upper ends of a rear wheel maintenance stand for a motorcycle, in which a pair of left and right lift arms for supporting and supporting the rear wheel by lifting the rear wheels are provided, and the rear wheel is detachable from the rear of the vehicle body. The abutment portions with the rear swing arm provided on the vehicle are independently and independently adjustable with a screw type for height adjustment.

[0008] In a second aspect based on the first aspect,
A plurality of rollers are arranged in the center of the lower part in the front-rear direction, and a rear wheel guide portion in which each roller mounting position is inclined so that the rear side is higher is provided.

[0009]

According to the first aspect of the present invention, the contact portions with the rear swing arms provided at the respective upper end portions of the left and right lift arms can be independently adjusted in height by a screw type. Even after the vehicle body is supported by the wheel maintenance stand, the height of each contact portion can be adjusted by the screw type in accordance with the unevenness of the ground contact surface, and the adjustment can be performed easily and accurately.

According to the second invention, a rear wheel guide portion having a plurality of rollers arranged in the front-rear direction is provided at the center of the lower portion of the rear wheel maintenance stand, and the rear wheel guide portion has a higher roller mounting position on the rear side. When the rear wheel is replaced, the positioning becomes accurate by the rear wheel guide portion. Moreover, since the rear wheel can be attached and detached from diagonally rear upper side of the vehicle body by using the rear wheel guide portion, replacement of the rear wheel becomes easy. Therefore, the replacement work of the rear wheel becomes quick.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment applied to a motorcycle for endurance racing will be described below with reference to the drawings. FIG. 1 shows a state in which the rear wheel maintenance stand is used (in a state where the vehicle is supported).
FIG. 2 is a partial cross-sectional view of the left half from the rear of the vehicle body.
Is a side view of the rear wheel maintenance stand, FIG. 3 is a plan view thereof, and FIG.
5 is a plan view of the rear wheel guide portion, FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, FIG. 6 is a side view of the rear wheel maintenance stand in use, FIG. 7 is a sectional view taken along line 7-7 of FIG. FIG. 12 to FIG. 12 are diagrams showing the steps of rear wheel replacement.

First, as shown in FIG. 1, FIG. 6 and FIG. 7, this motorcycle has a rear swing arm 2 having a chain-driven rear wheel 1 provided on the left and right sides thereof (only the left side of the vehicle is shown in the figure). ), And is rotatably supported by the axle 3.

The axle 3 is a hollow long bolt, and the head 4
The hole opened at the center of the rear wheel 1 is fitted and closed by a marker 5 described later, and extends to the other side through the hub 6 of the rear wheel 1 and the sprocket 7 engaged with the hub. The portion protrudes from the rear swing arm 2 on the other side (the right side of the vehicle body), and is fastened by a nut here.

The end of the hub 6 facing the sprocket 7 forms a substantially pentagonal petal-shaped portion 8 (see FIG. 6), while the central portion of the sprocket 7 facing the petal-shaped portion 8 has A fitting recess 9 having a corresponding shape is provided for fitting the petal-shaped portion 8 so that the two can be integrally rotated.

However, the engaging recess 9 does not completely correspond to the petal-shaped portion 8, but the rear half thereof is opened obliquely upward as shown in FIG. It can be disengaged upward.

The sprocket 7 is integrated with the hub 6 when the engagement concave portion 9 and the petal-shaped portion 8 are engaged, and is driven and rotated about the axle 3 by the chain 10 to drive the rear wheel 1. If the axle 3 is pulled out to the left in FIG. 7 and the tip is removed from the hub 6 so that only the sprocket 7 is supported, the axle 3 is left supported by the rear swing arm 2 via the axle 3 and Only the wheel 1 can be removed.

A hook 11 has a front end attached to the rear end of each of the left and right rear swing arms 2 and extends rearward. The hook 11 has a bifurcated shape including an upper portion 12 extending obliquely downward and a front portion 13 extending further downward, and a substantially V-shaped space 14 formed by the upper portion 12 and the front portion 13 is formed in a rearward direction. It is released diagonally downward.

The corners of the upper portion 12 and the front portion 13 serve as receiving portions 15 for a rear wheel maintenance stand 18 described later. The front portion 13 is inclined so that the lower portion is directed toward the center of the vehicle body as shown in FIG. 1, and the inclination of the inclined surface substantially coincides with a tangent L (FIG. 1) at the outer peripheral widthwise end of the rear wheel 1. ing.

Next, the rear wheel maintenance stand will be described. As shown in FIGS. 1 to 3, the rear wheel maintenance stand 18 is provided.
A base 20 which is substantially parallel to the ground contact surface and has a substantially U-shape in a plan view toward the front of the vehicle body, and a pair of left and right lift arms 21 which extend upward at substantially right angles from respective right and left front ends thereof.
It has.

An oblique side reinforcement 22 is provided between the base 20 and the lift arm 21, and a pair of left and right oblique bottom reinforcements 23 are provided between the left and right front-rear portions and the rear of the base 20. A cross pipe 24 is provided between the rear portions of the bottom reinforcement 23, and a rear wheel guide support 25 is provided thereon, and a rear wheel guide 26 having a plurality of rollers arranged thereon is supported.

At the rear of the base 20, there is provided a generally U-shaped handle 27 extending obliquely downward and rearward. A ground roller 28 is supported at each front end of the left and right portions of the base 20.

At each upper end of the left and right lift arms 21,
As a contact portion with the rear swing arm 2, an engaging pin 30 for engaging with the hook 11 is attached by a bolt 31, and is provided so as to protrude from the lift arm 21 toward the center of the vehicle body in the vehicle width direction. ing.

A center portion of a guide plate 32, which is substantially disc-shaped in side view, is mounted around the end of the engagement pin 30 on the lift arm 21 side. The upper half side of the guide plate 32 is inclined so that the outer peripheral side is inclined outward, and the inclination is substantially parallel to the front part 13.

The engagement pin 30 is connected to a guide plate 32
Is integrated with the slider 33 in the vicinity of the mounting portion. The slider 33 is formed with a bolt through hole 34 concentric with the engaging pin 30 through which the bolt 31 passes, and the lower end thereof is a head of an adjusting screw 36 screwed to the support projection 35 of the lift arm 21. 37. Support projection 3
Numeral 5 is formed integrally with the inner side surface of the lift arm 21 so as to protrude into the vehicle body at a position below the engagement pin 30.

The adjusting screw 36 is screwed to the supporting projection 35 so as to be adjustable, and is positioned by a lock nut 38. The lift arm 21 through which the bolt 31 penetrates
A long hole 39 is formed in the upper part of the upper part in the vertical direction. If the height of the head 37 is changed by loosening the bolt 31 and adjusting the adjusting screw 36, the slider 33 moves in the vertical direction. The height of the engagement pin 30 changes.

The engaging pin 30 is provided with a flange portion 40 on the front end side inward of the vehicle body to prevent the hook 11 from coming off outward, and a bolt 31 penetrating therethrough and projecting inwardly of the vehicle body. The fastening pin 30 is integrated with the bolt 31 by fastening the nut 41 to the tip screw portion.

Next, the structure of the rear wheel guide portion 26 will be described. As shown in FIG. 2 to FIG. 6, the rollers of the rear wheel guide portion 26 include a central roller 50 and three rows of side rollers 51 arranged on the left and right sides thereof, each of which is arranged three by three in the front-rear direction. The supporting member 52 having an upward U-shaped cross section,
The shaft is fixed to 53. Each support member 52, 53 is integrated with a common support plate 54 by bolts or the like.

The central roller 50 has a cylindrical shape, the side opening 51 has a frustoconical shape so as to contact the outer peripheral side of the rear wheel 1, the central roller 50 is low in the vehicle width direction, and The side rollers 51 are mounted so that they are high, so that the support members 52 are low and the support members 53 are high (FIG. 5).

Further, the support plate 54 is attached obliquely downward to the front in a side view with respect to the rear wheel guide portion support base 25, and the inclination angle is adjustable (FIG. 2). As shown in FIG. 6, the inclination of the rear wheel guide portion 26 is
When the rear wheel 1 is attached or detached, the angle is set so that the petal-shaped portion 8 can be guided so as to be easily engaged with and disengaged from the engagement concave portion 9.

As shown in FIGS. 6 and 7, a marker 5 is press-fitted into a shaft hole of the axle 3 which is opened at the center of the head 4 of the bolt constituting the axle 3. The marker 5 is formed of a suitable elastic material such as plastic having an outer diameter slightly larger than the hole diameter of the axle 3, and has a cylindrical shape so that the marker 5 is fixed to the axle 3 so that it does not come off during rotation. It has a body and a head 16 that is exposed to the outside at one end.

The surface of the head 16 is provided with marks 17 of alternate colors, such as red and blue, in the same direction, for example, at 90 ° intervals. When tightening or removing the axle 3 with a nut,
Since the nut side is rotated, the axle 3 rotates together with the nut during the operation, and the marks 17 have a continuous pattern, so that it is difficult to distinguish the individual marks 17.

Therefore, the mark 17 on the marker 5
By observing the appearance of, you can quickly determine whether the work is in progress or the work has ended. This is particularly advantageous for teamwork at a race track where separate workers are divided into left and right sides of the vehicle body and work by teamwork. .

The marker 5 can be variously deformed and does not always have a fitting type mounting structure.
An appropriate shape such as a flat plate such as a circular shape is possible, and it may be attached by screwing or bonding. In addition, since it is only necessary that the shaft rotates integrally with the end surface of the shaft member during co-rotation in the fastening operation, it is sufficient that the shaft end surface is directly marked with some mark such as paint, and the shaft is not limited to the rear wheel axle, but the front wheel May be used for other axles or other uses.

Next, the operation of this embodiment will be described with reference to FIGS. In order to replace the rear wheel 1, first, the rear wheel maintenance stand 18 is tilted and advanced from behind the vehicle body,
The rear wheel 1 is inserted between the left and right support arms 21 (FIG. 8).

Subsequently, when the engaging pin 30 is engaged with the receiving portion 15 of the hook 11 and the handle 27 is pushed downward,
The lift arm 21 rotates clockwise in FIG. 9 with the ground roller 28 as a fulcrum (FIG. 9). When the lift arm 21 stands upright, the rear part of the vehicle body is lifted and the rear wheel 1 rises (FIG. 10).

In this state, the axle 3 is pulled out to the left side of the vehicle body,
When only the sprocket 7 is supported at the tip, the petals 8 of the rear wheel 1 can come out of the engagement recesses 9 of the sprocket 7, so that the rear wheel 1 is pulled backward (FIG. 11).

At this time, since the rear wheel 1 is guided by the rear wheel guide portion 26 and advances obliquely rearward, the separation between the petal-shaped portion 8 and the engagement concave portion 9 is smooth, and the rear wheel 1 Backward movement is also easy (FIG. 12).

To mount a new rear wheel 1, the procedure is reversed. At this time, if the rear wheel 1 is inserted from behind the vehicle body,
In the state of FIGS. 2 and 11, the rear wheel 1 can be accurately positioned by the rear wheel guide portion 26, so that the petal-shaped portion 8 can be easily and quickly engaged with the engagement recess 9.

When the engaging pin 30 is engaged with the receiving portion 15, the engagement between the engaging pin 30 and the receiving portion 15 is facilitated by the vehicle body being guided by the inclination of the front portion 13 and the guide plate 32. The inclination of the front portion 13 and the guide plate 32 is set so as to guide the rear wheel 1 to the center of the vehicle body, so that the rear wheel 1 can be easily attached to the center of the vehicle body.
Positioning can be performed on the extension of the rear wheel guide portion 26.

Further, if there is unevenness in the ground contact surface in the state of FIG. 10 in which the vehicle body is lifted, the slider 33 is adjusted by turning the adjusting screw 36 on one of the left and right lift arms 21 to adjust the amount of protrusion of the head 37. Move up and down,
The left and right engaging pins 30 are set at the same height.

Since the adjustment by the adjusting screw 36 is of a screw type, it can be easily performed even when the vehicle body is lifted, and can be accurately and easily performed in accordance with the actual unevenness of the ground contact surface. In addition, the adjustment members that move during the adjustment are the slider 33, the guide plate 32, the engagement pins 30, and the like, and can be minimized.

[Brief description of the drawings]

FIG. 1 is a diagram showing the left half side of a rear wheel maintenance stand in use in a rear view.

[Fig. 2] Side view of rear wheel maintenance stand

FIG. 3 is a plan view thereof.

FIG. 4 is a plan view of a rear wheel guide portion.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a side view of the rear wheel maintenance stand in use.

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

FIG. 8 is a diagram showing one process of rear wheel replacement.

FIG. 9

FIG. 10

FIG. 11

FIG. 12

[Explanation of symbols]

1: rear wheel, 2: rear swing arm, 3: axle, 6: hub, 7: sprocket, 18: rear wheel maintenance stand, 2
1: lift arm, 26: guide portion, 30: engagement pin,
33: slider, 36: adjusting screw

Continued on the front page (72) Inventor Nobuo Ono 3-15-1, Izumi, Asaka-shi, Saitama Prefecture Inside Honda Racing Co., Ltd. (72) Inventor Naoki Hara 3-1-1, Izumi, Asaka-shi, Saitama Honda Co., Ltd. F-term in racing (reference) 3C012 BL02

Claims (2)

[Claims] 1. A pair of left and right lift arms for lifting and supporting the rear wheels by lifting a pair of left and right rear swing arms that support the rear wheels with the rear wheels interposed therebetween, and the rear wheels are detachable from the rear of the vehicle body. Automatic 2
In the rear wheel maintenance stand for wheeled vehicles, the contact portions with the rear swing arm provided at the upper end of each of the left and right lift arms are independently and screw-type adjustable in height. Rear wheel maintenance stand for motorcycles. 2. The vehicle according to claim 1, wherein a plurality of rollers are arranged in the center of the lower portion in the front-rear direction, and a rear wheel guide portion is provided in which each roller mounting position is inclined so that the rear side is higher. Rear wheel maintenance stand for motorcycles.