JP2000344170A - Front wheel steering device for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange a front fender that can always prevent the splashing of mud from a front wheel effectively without interference of the front fender to the front wheel. SOLUTION: On this front wheel steering device of a motorcycle 10, an axle holder block 54 is attached on a swing arm to swing vertically possible to turn right and left, and a front wheel 18 is attached on the axle holder block possible to rotate. One end of a link mechanism 80 is coupled to the knuckle 57 of the axle holder block and the other end of the link mechanism is coupled to a steering shaft 73. The link mechanism 80 is made to be a dogleg link possible to bend freely in order to correspond with the vertical movement of the front wheel 18. The coupling part between a first link 82 and a second link 84 constituting the dogleg shape link is faced forward. A front fender 21 for the front wheel 18 is attached on the first link 82 to be connected directly to the steering shaft 73.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle and, more particularly, to an improvement in a front suspension and steering of the motorcycle.

[0002]

2. Description of the Related Art Techniques related to front suspension and steering of a motorcycle are disclosed in, for example,
Japanese Patent Application Laid-Open No. 175275/1990 "Fender of a motorcycle" (prior art) and Japanese Patent Application Laid-Open No. 62-175279 "motorcycle" (prior art).

According to the above prior art, according to FIGS. 1 and 2 of the publication, a swing arm 4 (numbers quoted in the publication, the same applies hereinafter) is vertically swinged at the front of the vehicle body. The knuckle arm 7 is attached to the swing arm 4 so that the front wheel 3 is rotatable. The knuckle arm 7 is connected to one end of a link mechanism (combination mechanism of the members 14 to 18). ,
The other end of the link mechanism is connected to a bar handle shaft 13, and further, a knuckle arm 7 is connected to a front wheel fender 20.
It is to attach.

According to the above prior art, according to FIGS. 1 and 2, a front swing arm 4 is attached to a front portion of a vehicle body so as to be able to swing up and down, and a knuckle arm 9 is attached to the front swing arm 4 so as to be able to turn left and right. The front wheel 3 is rotatably mounted on the knuckle arm 9, one end of a link mechanism (combination mechanism of the members 20 to 23) is connected to the knuckle arm 9, and the other end of the link mechanism is connected to the bar handle stem shaft 19.
And clamps 35 and 36 for supporting the speedometer cable 27 and the brake hose 30 are attached to the knuckle arm 9.

[0005]

The above prior arts are
Since the front wheel fender 20 is attached to the knuckle arm 7, the fender 2
0 is greatly displaced in the front-rear direction, which is inconvenient.

In the above prior art, the relationship between the front wheel 3 and the front fender is unknown. Further, in the above-described conventional technique, the knuckle arm 9 swings largely in the front-rear direction according to the vertical movement of the front wheel 3. Therefore, the speedometer cable 27 and the brake hose 30 are sufficiently bent between the vehicle body and the knuckle arm 9. Therefore, the speedometer cable 27 and the brake hose 30, which have large flexures, do not interfere with the front wheels 3, and
Care must be taken to ensure that they can be routed without difficulty.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a front wheel steering device for a motorcycle, in which (1) a front fender is prevented from interfering with a front wheel and mud splashing from the front wheel is always effectively prevented. (2) A flexible linear member such as a cable that passes between the front wheel and the vehicle body is routed without interfering with the front wheel.

[0008]

According to a first aspect of the present invention, a swing arm extending forwardly of a vehicle body is mounted on a main frame so as to be vertically swingable, and an axle holder block is mounted on the swing arm so as to be able to turn left and right. ,
The front wheel is rotatably mounted on the axle holder block, a knuckle is integrally extended from the axle holder block, one end of a link mechanism is connected to the knuckle, and the other end of the link mechanism is rotatably mounted on the head pipe. This is a front wheel steering device for a motorcycle that steers the front wheels by connecting to the steering shaft.The link mechanism is formed into a bendable "-"-shaped link to accommodate the vertical movement of the front wheels. The connecting portion between the first and second links forming the V-shaped link is directed forward, and the front fender for front wheels is attached to the first link of the first and second links that is directly connected to the steering shaft. It is characterized by being attached.

With respect to the swing direction of the swing arm,
The second link swings in the opposite direction, and the first link swings in the same direction. Therefore, even if the swing angle of the swing arm is large according to the amount of vertical movement of the front wheel,
The swing angle of the first link can be reduced. A front fender was attached to the first link having a small swing angle. For this reason, displacement of the front fender in the front-rear direction can be suppressed. Furthermore, since the front fender is attached to the first link that swings up and down in accordance with the vertical movement of the front wheel, it is easy to secure a vertical gap between the front fender and the front wheel. Therefore, the front fender does not interfere with the front wheels.

According to a second aspect of the present invention, a swing arm is attached to the main frame so as to be able to swing up and down, an axle holder block is attached to the swing arm so as to be able to turn left and right, and a front wheel is attached to the axle holder block so as to be rotatable. The knuckle is integrally extended, one end of a link mechanism is connected to the knuckle, and the other end of the link mechanism is connected to a steering shaft rotatably mounted on a head pipe, thereby automatically steering the front wheels. A front wheel steering device for a two-wheeled vehicle, wherein the link mechanism is a `` C ''-shaped link that can be bent in order to correspond to the vertical movement of the front wheel, and the C-shaped link is provided between the front wheel and the vehicle body side. It is characterized in that a flexible linear member such as a cable to be passed is put along.

[0011] The flexible linear member extending from the front wheel side is "ku".
And extended to the vehicle body side through an end connecting the link to the steering shaft. In this way, the flexible linear member can be passed between the front wheel and the vehicle body. For this reason, there is no need to largely bend the flexible linear member between the front wheel and the vehicle body. Therefore, the flexible linear member can be easily and easily routed without causing interference with the front wheel.

According to a third aspect of the present invention, the side surface of the V-shaped link is covered with a cover, and the cover is attached to the first link connected to the steering shaft among the first and second links constituting the V-shaped link. It is characterized by.

[0013] The side surface of the V-shaped link along the flexible linear member was covered with a cover. Therefore, the V-shaped link and the flexible linear member have few portions exposed to the outside. Further, a cover was attached to the first link connected to the steering shaft. For this reason, a mounting member such as a stay made of a separate member is not required, and the mounting structure is simplified.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that "before", "after",
“Left”, “right”, “up”, and “down” follow the direction viewed from the driver, and Fr indicates the front side, Rr indicates the rear side, L indicates the left side, and R indicates the right side. Also, the drawings should be viewed in the direction of reference numerals.

FIG. 1 is a right side view of a scooter type motorcycle according to the present invention. Scooter type motorcycle 10 (hereinafter, referred to as
Simply referred to as "motorcycle 10". ), A main frame 11 composed of a frame body is arranged at the lower center, a frame pivot 12 is provided at a rear portion of the main frame 11, a power unit 14 is attached to the frame pivot 12 by a pivot shaft 13 so as to be able to swing up and down, and Wheel 1
5 and the power unit 14 is suspended above the rear upper portion of the main frame 11 by the rear cushion 16.
Attach the seat 17 to the upper rear part of the main frame 11,
Further, a front suspension system 50 for suspending the front wheels 18 and a steering system 70 different from the front suspension system 50 are attached to a front portion of the main frame 11.

Further, the motorcycle 10 includes a front fender 21, a front cover 22, a steering wheel cover 23, and a leg shield 2 for covering the driver's legs from the front of the vehicle.
4, a step floor 25 on which the driver's feet are placed, and two front fenders 26F and 26R. In the figure, 31 is a mirror, 32 is a handlebar, 33 is a brake operating lever, 34 is a speedometer, 35 is a headlamp, 36 is a blinker, 37 is a main stand, 38 is a side stand, 39 is a storage box and side cover,
41 is a carrier, 42 is a tail lamp, 43 is an air cleaner, 44 is a carburetor, 45 is an exhaust pipe, and 46 is a muffler.

FIG. 2 is a perspective view of a front portion of the scooter type motorcycle according to the present invention, and shows a front suspension system 50.
And a steering system 70. A front suspension system 50 includes a swing arm 52 having a substantially inverted U-shape when viewed from the side, with a pivot shaft 51 provided at a lower front portion of the main frame 11.
The swing arm 5
Axle holder block 5 with king pin 53 at the front end of
The front wheel 18 is rotatably mounted on the axle holder block 54 by means of an axle 55. That is, the swing arm 52 is extended from the front of the main frame 11 to the front of the vehicle body while bending rightward so as to bypass the front wheel 18.
This is a swing arm type suspension that supports cantilever 8 in a cantilever manner.

The steering system 70 includes a main frame 1
The head pipe post 71 extends from the front of the head pipe 1 to the upper front, and the head pipe 72
The steering shaft 73 is attached to the head pipe 72.
Is rotatably mounted on the lower end 73 of the steering shaft 73.
a is connected to the knuckle 57 via a link mechanism 80. Specifically, the knuckle 57 is formed integrally with the axle holder block 54, one end of the link mechanism 80 is connected to the knuckle 57, and the other end of the link mechanism 80 is connected to the steering shaft 73, so that the front wheel 18 It is a steering that is steered. The main frame 1
The combined structure of 1 and the head pipe post 71 forms a body frame 11A.

FIG. 3 is a right side view of the front suspension system and the steering system according to the present invention. The axle holder block 54 forms a supported portion (king pin mounting portion) 56 for mounting the king pin 53 at a lower rear portion,
The axle 55 is attached at the center, and the knuckle 57 is slightly extended along a line O extending from the axle 55 to the front upper side.

Further, the front suspension system 50 includes:
A cushioning member 61 for mitigating a shock in the swing direction of the swing arm 52 (shock from a road surface);
And a front damper 62 for reducing the amplitude of the vibration in the swing direction. Cushioning member 61
Is a resin block that can be elastically deformed so as to perform a spring action, and is interposed between the main frame 11 and the swing arm 52 to serve as a spring. The front damper 62 is mounted between the front side of the main frame 11 and the middle of the swing arm 52.

The link mechanism 80 includes a front wheel 18 (see FIG. 2).
Is a "-"-shaped link that can be bent in order to correspond to the up-and-down movement of the "-". The connecting portion 85 between the first and second links 82 and 84 forming the "-"-shaped link is directed forward. is there. Specifically, the link mechanism 80 includes: (1) a first link 82 in which one end is directly connected to a lower end 73 a of the steering shaft 73 by a first connection pin 81 so as to be able to swing up and down.
(2) a second link 84 having one end directly connected to the distal end portion 57a of the knuckle 57 with a second connecting pin 83 so as to be able to swing up and down; and (3) a first and second link 82, 8
4, that is, the first and second links 82 and 84.
And a universal joint 86 connected between the connecting portions 85 so as to be able to swing up and down. The universal joint 86 is, for example, a ball joint.

The positional relationship between the members will be described. The lower end 73 of the steering shaft 73 with respect to the pivot shaft 51 is described.
a is arranged at the front upper portion, the first connecting pin 81 is arranged at the same position or slightly before the lower end portion 73a, the king pin 53 is arranged at the lower front portion with respect to the first connecting pin 81, and the king pin 53 is arranged. , The axle 55 is disposed in front of the axle 55, the second connecting pin 83 is disposed in the upper front portion of the axle 55, and the connecting portion 85 is disposed in the upper front portion of the second connecting pin 83. In other words, the second connecting pin 83 is disposed at the upper front part with respect to the pivot shaft 51, and the connecting portion 8 is connected to the second connecting pin 83.
5, the lower end 73a of the steering shaft 73 and the first connecting pin 81 are arranged at the upper rear part with respect to the connecting part 85. That is, the connecting portion 85 is a knuckle 5
7 is located near the front end 57a and substantially along the line O (above the front of the front end 57a).

The first link 82 is a long link that extends from the first connecting pin 81 to the vicinity of the tip end 57a of the knuckle 57 while bending forward and downward. The second link 84 is a shorter link than the first link 82.

Further, this figure shows that the brake cable 94 and the speedometer cable 98 are routed along the link mechanism 80, in particular, the first link 82. These brake cable 94 and speedometer cable 98 are
It is a flexible linear member that passes between the front wheel 18 and the body frame 11A (vehicle body) side. Specifically, a flexible linear member 94 extending from the front wheel 18 side (the axle holder block 54 side),
98 along the first link 82, and furthermore, a portion connecting the first link 82 to the lower end 73a, ie, the first link 82.
The link 82 was passed along the center of the swing of the link 82 and along the head pipe 72 and the steering shaft 73.

In this manner, the flexible linear members 94, 9
8 can be passed between the front wheel 18 and the vehicle body side. Therefore, the flexible linear member 9 is disposed between the front wheel 18 and the vehicle body.
The 4,98 need not bend significantly. Therefore, the flexible linear members 94 and 98 can be easily and easily routed without causing interference with the front wheel 18. As is apparent from the above description, various flexible linear members (cables, harnesses, hoses) passing between the front wheel 18 side and the body frame 11A side are arranged along the link mechanism 80. In addition, the flexible linear member can be easily and easily routed, the appearance can be improved, and the friction (friction resistance) when the flexible linear member bends can be reduced. .

FIG. 4 is a side view of the front part of the scooter type motorcycle according to the present invention, showing the following (1) to (5). (1) The handlebar 32 is connected to the steering shaft 73. (2) The brake operation lever 33 and the speedometer 34 are attached to the handlebar 32. (3) The brake operating arm 93 and the speed sensor 97 are mounted on the axle holder block 54. The speed sensor 97 is a detector that detects the rotation of the axle 55.

(4) The brake operating lever 33 and the brake operating arm 93 are connected by a brake cable 94. The brake operation arm 93 is connected to the brake cable 9.
4 for connecting the inner wires 95. 57b is an outer mounting portion for a brake cable. (5) The speedometer 34 and the speed sensor 97 are
Connection with speedometer cable 98. When the speedometer 34 is an electric meter, a harness may be used instead of the speedometer cable 98.

The present invention provides a link mechanism (curved link) 8
0 shows that the cover 105 covers the right side surfaces of the flexible linear members 94 and 98 along the link mechanism 80. Since the link mechanism 80 is a curved link, a cover 105 for covering almost the entire curved link is provided.
This is also a cover shaped like a letter when viewed from the side. By the cover 105, the link mechanism 80 and the flexible linear members 94 and 98 are provided.
However, the portion that is exposed to the outside can be reduced. Therefore, the link mechanism 80 and the flexible linear members 94 and 98 can be effectively protected from the outside. Moreover, the appearance of the motorcycle 10 can be improved.

Further, this figure shows that the long first link 82
This shows that the upper part and the side part of the front fender 21 are attached with the bolts 101, 103, and 103, and the two side parts of the cover 105 are attached with the bolts 107 and. Details of the mounting structure will be described later.

FIG. 5 is a front sectional view of a front suspension system and a steering system according to the present invention, in which a link mechanism 80 is exploded for convenience. This figure shows that the axle holder block 54 extends to both sides of the vehicle body center CL, and that the first link 82 moves rightward from the lower end 73a of the steering shaft 73 located at the vehicle body center CL so as to bypass the front wheel 18. It shows that it extended forward while bending.

Further, this figure shows an axle holder block 54.
This shows that the front drum brake 91 is mounted between the front drum 18 and the hub 18a of the front wheel 18. The front drum brake 91 is mounted on the axle holder block 54 with the brake operating shaft 9.
2 is rotatably mounted, and a brake operation arm 93 is mounted on a brake operation shaft 92.

Here, the mounting structure of the front fender 21 and the cover 105 will be described. The front fender 21 is integrally formed with a stay 21 a at an upper rear portion thereof, and the stay 21 a is attached to the first link 82 by a bolt 101.
And further attach the side surface of the longitudinal middle portion to the first link 8.
By attaching to the stay 102 of 2 with the bolt 103,
It is fixed to the first link 82. Cover 105
Is attached to the side of the upper rear part by the mounting boss 1 of the first link 82.
The first link 82 is fixed to the first link 82 by attaching it to the stay 102 of the first link 82 with a bolt 108, and further attaching the side surface of the intermediate longitudinal portion to the stay 102 of the first link 82 with a bolt 108.

As described above, since the front fender 21 and the cover 105 are attached to the long first link 82, there is no need for a separate attaching member such as a stay for attaching to the vehicle body frame 11A, and the attaching structure is simple. And the mountability is improved. The first link 82 is formed by attaching a middle part of a brake cable 94 and a middle part of a speedometer cable 98 via a clamp 109.

FIGS. 6A and 6B are explanatory diagrams (1) of the operation of the front suspension system and the steering system according to the present invention. (A) shows a side configuration of the front suspension system 50 and the steering system 70. Here, the position of the pivot shaft 51 is point A, the position of the second connection pin 83 is point B, the position of the connection part 85 is point C, and the position of the first connection pin 81 is point D. BC
The length between the CDs as well as the length between the CDs is constant, and the length between the DBs can vary. Point A is the center of the movement locus (first movement locus) X of point B, and point D is the center of the movement locus (second movement locus) Y of point C. Point D is above point A. That is, the position of the point D is different from the position of the point A.

When the symbols A to D, X, and Y are arranged,
It looks like this: Point A; center of movement locus of point B (swing center of swing arm 52) Point B; part where second link 84 is connected to knuckle 57 Point C; connection part 85 (universal joint 86) Point D; Center of movement locus (swing center of first link 82) First movement locus X; movement locus of point B (movement locus of tip of knuckle 57) Second movement locus Y; movement locus of point C (moving locus of connecting portion 85) Trajectory)

FIG. 3B schematically shows the front suspension system 50 and the steering system 70 shown in FIG. When the point B is displaced counterclockwise from the point A on the first movement trajectory X to the point Bo, the horizontal movement distance from the point B to the point Bo, that is, the first horizontal displacement amount is P.

BC = BoCo, CD = CoD,
Three points (points B, C, and D) that become connection points for the figure links
Since the position of the point D is fixed, the point C is determined when the point B is determined, and the point Co is also determined when the point Bo is determined. Point A
When 〜D is at each position shown in (b), the horizontal distance between BCs (initial horizontal distance) is Q.

Now, when the line AB swings counterclockwise about the point A by the swing angle α, the point B moves counterclockwise to the point Bo on the arc-shaped first movement trajectory X. As the point B is displaced to the point Bo, the line BC swings clockwise and tries to become horizontal. The horizontal distance between the BoCos (horizontal distance after displacement) at this time is S. The horizontal distance S after the displacement is larger than the initial horizontal distance Q (S> Q).

Here, assuming that the second horizontal displacement amount between CCos is R, the horizontal distance S after displacement is represented by S = P + Q + R. Since the point Bo after the displacement is determined, the point Co becomes the point Bo.
Is determined at a position separated by the horizontal distance S after being displaced from the right to the right. That is, the point C is shifted to the right by the second horizontal displacement amount R
Is displaced. As a result, the line CD swings counterclockwise around the point D.

As is clear from the above description, the point C, which is the connection point between the line BC and the line CD, is directed forward (to the right in this figure), so that the line B is shifted with respect to the swing direction of the line AB.
While line C swings in the opposite direction, line CD swings in the same direction. Therefore, when the line AB swings by the swing angle α, the horizontal distance S after the displacement becomes larger than the initial horizontal distance Q (S> Q), but the first horizontal line S extends to the point Bo in the opposite direction to the point Co. It is displaced by the displacement amount P. As a result, the second horizontal displacement amount R is extremely small because R = SPQ. Since the second horizontal distance R is small, the swing angle θ of the line CD is small. Moreover, since the line CD is much longer than the line BC (BC <CD), the swing angle θ of the line CD is further reduced as compared with the case where the line CD has the same length. Therefore, the swing angle θ of the line CD is smaller than the swing angle α of the line AB (θ <α).

FIG. 7 is a diagram (part 2) for explaining the operation of the front suspension system and the steering system according to the present invention. When the front wheel 18 moves up and down, the knuckle 57 swings up and down greatly according to the amount of movement. As a result, the portion where the second link 84 is connected to the knuckle 57 also
Large displacement. However, the second horizontal displacement R of the connecting portion 85 is small. Since the second horizontal displacement amount R is small, the first
The swing angle θ of the link 82 is small. Since the swing angle θ of the first link 82 is small, the displacement of the front fender 21 in the front-rear direction is suppressed. Therefore, the front fender 21 is located at a position where mud splashing from the front wheel 18 can be effectively prevented.
Can be easily arranged, and as a result, the motorcycle 10 can run with the front fender 21 always in the optimum use state.

Moreover, when the front wheel 18 moves up and down,
The first link 82 swings up and down according to the amount of movement. Since the front fender 21 is mounted on the first link 82 of the vertical swing type, the front fender 21 swings up and down according to the amount of vertical movement of the front wheel 18. Therefore, it is easy to secure a vertical gap between the front wheel 18 and the front fender 21, and the front fender 21 does not interfere with the front wheel 18.

At the time of steering, the steering shaft 73
Since the front wheel 18 is steered via the first and second links 82 and 84, the lateral gap between the front fender 21 attached to the first link 82 and the front wheel 18 is always constant. Therefore, the front fender 21 does not interfere with the side of the front wheel 18.

Further, as shown in FIG. 4, since the cover 105 is attached to the first link 82, like the front fender 21, when the front wheel 18 moves up and down, the cover 105 is moved according to the amount of movement. In addition to swinging up and down, the displacement of the cover 105 in the front-rear direction can be suppressed. In addition, during steering, the lateral gap between the front wheel 18 and the first link 82 and the cover 105 is always constant. Therefore, the cover 105 is attached to the front wheel 18 and the first
The link mechanism 80 and the flexible linear members (the brake cable 94 and the speedometer cable 98) can always be covered in an appropriate state without interfering with the link 82. Therefore, the link mechanism 80 and the flexible linear member can be more effectively protected from the outside, and the appearance of the motorcycle 10 can be further improved.

In the embodiment of the present invention,
The motorcycle 10 is not limited to a scooter type motorcycle. The shapes, dimensions, and materials of the front fender 21 and the cover 105 are arbitrary.

[0046]

According to the present invention, the following effects are exhibited by the above configuration. According to a first aspect of the present invention, the link mechanism connected between the swing arm extending to the front of the vehicle body and the steering shaft is a "-"-shaped link that can be bent to correspond to the vertical movement of the front wheel. The connecting portion between the first and second links constituting the front is directed forward, and of the first and second links,
Since the front fender for the front wheels is attached to the first link directly connected to the steering shaft, the second link swings in the opposite direction to the swing direction of the swing arm, and the first link swings in the same direction. Therefore, when the front wheel moves up and down, the swing angle of the first link can be suppressed smaller than the swing angle of the swing arm even if the swing arm swings up and down greatly according to the amount of movement. By attaching the front fender to the first link having a small swing angle, the displacement of the front fender in the front-rear direction can be suppressed. Therefore, the front fender can be easily arranged at a position where mud splashing from the front wheels can be effectively prevented, and as a result, the motorcycle can be run with the front fender always in an optimal use state.

Further, since the front fender is of a vertical swing type mounted on the first link, it is easy to secure a vertical gap between the front fender and the front wheel. Therefore,
The front fender does not interfere with the front wheels. Furthermore, at the time of steering, the first and second steering shafts are used.
Since the front wheels are steered via the links, the lateral gap between the front fender attached to the first link and the front wheels is always constant. Therefore, the front fender does not interfere with the side of the front wheel.

A second aspect of the present invention provides a link mechanism, wherein the link mechanism is a "-"-shaped link that can be bent to cope with the vertical movement of the front wheel, and a cable that passes between the front wheel and the vehicle body through the "-" link. Since the flexible linear members are arranged along the line, there is no need to greatly flex the flexible linear members between the front wheel and the vehicle body. Therefore, the flexible linear member can be easily and easily routed without causing interference with the front wheel. Moreover, friction (friction resistance) when the flexible linear member bends in response to the vertical movement of the front wheel can be reduced.

According to the third aspect of the present invention, since the side faces of the U-shaped link are covered with the cover, the portion of the U-shaped link and the flexible linear member exposed to the outside can be reduced. Therefore, the V-shaped link and the flexible linear member can be effectively protected from the outside. Moreover, the appearance of the motorcycle can be improved. Furthermore, since the cover is attached to the first link that is connected to the steering shaft among the first and second links that form the V-shaped link, there is no need for a separate attachment member such as a stay, and the attachment structure is not required. It is simple and easy to install.

[Brief description of the drawings]

FIG. 1 is a right side view of a scooter type motorcycle according to the present invention.

FIG. 2 is a perspective view of a front portion of the scooter type motorcycle according to the present invention.

FIG. 3 is a right side view of a front suspension system and a steering system according to the present invention.

FIG. 4 is a side view of a front portion of the scooter type motorcycle according to the present invention.

FIG. 5 is a front sectional view of a front suspension system and a steering system according to the present invention.

FIG. 6 is an operation explanatory view (part 1) of the front suspension system and the steering system according to the present invention.

FIG. 7 is an explanatory view of the operation of the front suspension system and the steering system according to the present invention (part 2).

[Explanation of symbols]

10: motorcycle, 11A: body (body frame), 1
DESCRIPTION OF SYMBOLS 1 ... Main frame, 18 ... Front wheel, 21 ... Front fender, 50 ... Front suspension system, 52 ... Swing arm, 53 ... King pin, 54 ... Axle holder block, 57 ... Knuckle, 70 ... Steering system, 72 ... Head pipe, 73 ... steering shaft, 80 ... link mechanism, 82 ... first link, 84 ... second link, 85 ... connecting part, 94, 98 ... flexible linear member (brake cable,
Speedometer cable), 105 ... cover.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroyoshi Kobayashi 1-4-1 Chuo, Wako-shi, Saitama Pref. Inside Honda Research Laboratory, Inc. (72) Inventor Hiromi Furuhashi 1-4-1 Chuo, Wako-shi, Saitama No. F-term in Honda R & D Co., Ltd. (Reference) 3D012 BM06 BM11 3D013 CB02 CB12 CB14 3D014 DD03 DD05 DE06 DE35

Claims (3)

[Claims] 1. A swing arm extending forwardly of a vehicle body is attached to a main frame so as to be vertically swingable, and an axle holder block is attached to the swing arm so as to be able to turn left and right.
A front wheel is rotatably mounted on the axle holder block, a knuckle is integrally extended from the axle holder block, one end of a link mechanism is connected to the knuckle, and the other end of the link mechanism is rotatable on a head pipe. A front wheel steering device for a motorcycle that steers a front wheel by being connected to a mounted steering shaft, wherein the link mechanism is a non-bendable link in order to correspond to the vertical movement of the front wheel, The connecting portion between the first and second links that form the V-shaped link is directed forward, and the front fender for front wheels is attached to the first link of the first and second links that is directly connected to the steering shaft. A front wheel steering device for a motorcycle, wherein the front wheel steering device is mounted. 2. A swing arm is attached to the main frame so as to be able to swing up and down, an axle holder block is attached to the swing arm so as to be able to turn left and right, a front wheel is attached to the axle holder block so as to be rotatable, and a knuckle is removed from the axle holder block. The knuckle is integrally extended, and one end of a link mechanism is connected to the knuckle, and the other end of the link mechanism is connected to a steering shaft rotatably mounted on a head pipe, whereby a front wheel is steered. In the front wheel steering device, the link mechanism is a non-bendable character link in order to correspond to the vertical movement of the front wheel, and a cable or the like passing between the front wheel and the vehicle body side in the U-shaped link. A front wheel steering device for a motorcycle, comprising a flexible linear member. 3. The U-shaped link, the side surface of which is covered with a cover, and a first link forming the U-shaped link.
A first link connected to the steering shaft among the second links;
The front wheel steering device for a motorcycle according to claim 2, wherein the cover is attached to a link.