JPH05500487A - Steering suspension device for two-wheel drive motorcycles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Steering wheel for two-wheel drive motorcycle suspension equipment The present invention relates to a steering suspension device for a two-wheel drive motorcycle.

Suspension devices for two-wheel drive motorcycles are, in particular, covered by PCT French Patent Application FR8. It is well known from the specification of No. 8-00073. This suspension device The steering wheel is also provided with swing arms each connected to the rotating shaft of the steering hub. this The steering hub has a portion fixed to the swing arm and a first portion fixed to the wheel. It is mounted so that it can rotate freely. This first part is further pivoted for one rotation axis. It is pivotally mounted.

The main unit is oriented so that this first part is oriented with respect to the rotating shaft fixed to the swing arm. The position is a combination of two triangular members whose tops are mutually pivotally attached to this first part. A fixed piece with the upper end connected to the steering wheel, in this case the handlebar. form a fork. The free ends of said triangular members are connected to one of the triangular members. on the rudder, and on the upper end of the fork for the other triangular member. By means of universal joints placed between each element to rotate independently of the number of wheels. It is fixed.

The device also uses a strut located between the frame and the upper end of the fork. This is supplementary so that the combination constitutes four substantially deformable variants. This pillar is It also acts as a transmission housing for the front wheels.

Although such a device provides satisfactory operation, it increases the unsuspended mass and the number of turns. There are obstacles that limit the phrase potential. Furthermore, this system In this case, assembling the front wheel becomes too difficult.

Other suspension devices for two-wheel drive motorcycles have been proposed in the past, in particular telescopic suspension devices. The fork system has a number of chain tensions that allow the power to be transmitted to the front wheels. This is proposed in French Patent Application No. FR 2,628,055, which provides the following.

Tensioners hinder the realization of such devices, making them extremely unreliable and extremely expensive to produce. It has a complexity that makes it extremely expensive.

The purpose of the present invention is to consider the suspension function and steering function separately, and to By combining various mechanical elements that can achieve these functions, The purpose is to eliminate equipment failures.

The steering suspension device according to the invention is simple and inexpensive (easy to operate). It is not very cumbersome and lightweight, and furthermore, this device has a large steering angle. mounting the front wheel on a fork with one arm or two arms. Can be done.

To this end, the steering suspension device for a two-wheel drive motorcycle according to the invention comprises: The frame that supports the engine, the fork, and the lower end of this fork that can rotate freely. The attached front wheel, the pillar located between the fork and the frame, and the A changeable shaft that passes through the strut that constitutes the housing and is located between the engine and the front wheels of the This device is equipped with a speed mechanism that connects the upper end of the front fork and the frame. means for guiding said fork in the plane of the motorcycle, located between said forks; and means for guiding the rotation of the fork around the fork.

According to the present invention, the steering suspension device has the first guide means as an autopilot. The motor is rotatably mounted around an axis perpendicular to the plane of the frame and fixed to the frame. Pivot so that it has at least two degrees of freedom relative to the free branch and the upper end of the fork. It is characterized by being composed of a triangular member with a point attached to the According to a particular embodiment, each branch of the triangular member is provided with a slot through which the second guide means passes. It is growing.

According to a main embodiment, the second guide means is connected by a free end to the steering shaft. at least one upper connecting rod connected by a free end to the upper end of the fork; It is equipped with a rocking rod located between the lower connecting rod and one of the lower connecting rods.

According to one feature, each lower connecting rod has a corresponding slot in each side of the triangular member. Penetrate.

The swing rod is rotatably attached to the 71/-m, and a ball jig is attached to the end of the connecting rod. A joint is installed.

According to one feature of the invention, the front fork has a free end fixed to the driven sprocket. a drive universal joint driven by a first gear shift lever housed in a support column; and a fork. It is equipped with a drive sprocket that drives the front wheels by a second transmission housed inside. Ru.

According to one variant, the first transmission housed in the column has a third transmission that engages directly with the electric motor. It is equipped with a one-sided clutch that is driven by the machine. Also, there is a second coin stored inside the fork. The transmission includes a brake means that acts directly on the driven sprocket of the second transmission. ing.

The present invention will now be described with reference to specific embodiments thereof and the accompanying drawings.

Figure 1 shows the front of a t-doper equipped with a rudder suspension device according to the present invention. FIG.

2 is a plan view of the direction indicating suspension device taken along line 2-2 in FIG. 1; FIG. .

FIG. 3 is a cross-sectional view taken along line 3--3 in FIG. 2, excluding the lower portion.

FIG. 4 is a cross-sectional view of the lower portion taken along line 3-3 in FIG. FIG. 1 shows a motorcycle 1o. The motorcycle 10 has a rudder 14 and a front fork. The frame 12 is provided with a arc 16. The fork 16 has a front wheel 18 , the strut 20 and the steering suspension device 22 are attached.

A conventional frame 12 supports an engine 24 and a gear 14. The rudder 14 itself is a handle. Equipped with Dorpar 26.

The handle par 26 is rotatably attached to the peel-off column 28. claw claw The shaft 3o protrudes from below the rake column on the lower side of the frame 12. Pillar 2 o includes a housing 32 and side reinforcements 34. Inside the housing 32, A first variable speed drive driven by a drive sprocket 38, shown in detail in the cross section of FIG. The speed gear 36 is installed. The first gear shift 4136 is an angle mounted on the fork 16. A chain is provided which engages the drive 40.

This angle drive is shown in more detail in the cross-sectional view of FIG.

This angle drive has ends 44,46 connected to the housing 32 by bearings 48. and each end is rotatably attached to the fork 16 by a bearing 5o. Universal joint 42 with driven sprockets 52 and 54 attached to portions 44 and 46, respectively. We are prepared. The bearing seat 33 is arranged so that the housing 32 is flat with respect to the axis 58 of the motorcycle. Rotatable with respect to the housing 32 by a bearing 56 so as to be able to pivot in a plane. It is installed on. The bearing seat 33 is also supported by the bearing 6o under L housed in the fork 16. It is mounted rotatably around an axis 58.

The second gear shift gear 62 includes a drive sprocket 54 and a driven sprocket 6 shown in FIG. 4. The sprocket 64 supports the wheel and supports the needle and ball shafts. A wheel is rotatably mounted on a short shaft 66 by a receiver 70, and the wheel rotates about an axis 72. Please install it as shown below.

The brake equipment @74 is fixed to the fork 16. Brake equipment! 74 chin 76 apply a pressing force directly to the periphery of the sprocket 64, respectively.

The fork 16, in its upper position, has two side flanges and is shown in detail in FIG. A plate 78 is provided with a central pivot 82. The plate 84 is centered around the axis 58. It is rotatably mounted to the pivot 82 by a bearing 86.

The steering suspension device according to the invention also includes a triangular member 88. triangle The free branch 90 of the shaped member 88 is fixed to the frame as shown in FIGS. It is. Point 92 of triangular member 88 is fixed to the upper end of fork 6. Point 9 2 has a bearing 96 connected to the plate 84 by a screw 98, which allows water to flow perpendicular to the axis 58. In particular, it is mounted rotatably about the flat axis 94. This triangular member 2 and pivoted about an axis 100 as shown in FIG. Form a link with a frame. Each branch 90 has a lower steering connection 1 04 is provided with a slot 1.02 through which it passes. One end 108 of the connecting rod 104 is a plate. The lower rod 11 of 12 is fixed to each flange of 78, but the other end 108 is a swing rod. It is fixed at O. The rocking rod 112 is attached to an axis @ 114 as shown in detail in FIG. It is mounted around the frame so that it can rotate freely. End of each lower connecting rod 104 is equipped with a ball joint attachment part that can create a freely deformable quadrilateral shape. Ru. The mutually parallel sides of this quadrilateral form a pair of lower connecting rods 1.04 The lower arm 110 of the swing plate 112 and the plate 78 constitute the structure.

The rocker bar 12 also includes an upper bar 116 that is substantially parallel to the lower bar 110. Up An end 118 of an upper steering coupling bar 120 is fixed to the end of the upper steering coupling bar 116, and The other end of the rod 120 is fixed to the shaft 30 of the steering column 28 as shown in Figure @1. Ru. In order to maintain the spacing between these upper steering coupling rods 120, the steering wheel shaft 30 is also operated. A vertical arm 122 is provided. End of lower connecting rod 120 with ball joint The part is fixed to the end of the steering arm.

The embodiment shown in FIGS. 1-4 further includes a single driven sprocket 126. The direction clutch 124 has been out for a long time. The driven sprocket 126 is used for rear wheels and front wheels. The shaft 328 supporting the drive sprocket 38 is moved only when the speeds of the wheels are different from each other. drive Such latches, which are well known to those skilled in the art, are of the centrifugal type. Ru. Furthermore, this steering suspension device includes a supporting member 34 and a support member 34 and ) A buffer member 11 as shown in FIG.

This damping member, shown diagrammatically in FIG. or between the branch 90 of the triangular member 88 and the frame 12. These variations form part of the invention.

The operation of the device of the present invention will be described below.

When the front wheel 18 encounters an obstacle, the fork 16 engages the frame 12 and forms a triangle. By deforming the quadrilateral formed by the branch 90 of the shaped member 88 and the support 20, Lift up. This force is resisted by the suspension device 11. By the pillar 20 Also, in particular, the reinforcement 34 and the branch 90 of the steering suspension triangle 88 A guiding effect can be obtained.

Furthermore, by causing movement of the coupling rod 120, the handlebar 26 allows the steering Rotation occurs within the take-up column 28. The coupling rod 120 pivots about the axis 114. The upper portion 116 of the rocking rod 112, which rotates the lower rod 110, is driven to rotate. shaft The rotation of the lower bar 110 about line 1) causes the movement of the lower steering column 1.04. movement occurs.

The coupling rod 104 in this case rotates the front fork 16 about the axis 58. mosquito The steering link 104 is a branch of the triangular member 88 of the steering suspension system of the present invention. 90 through the slot 102.

Each branch 90 can only pivot about an axis 100 in the plane of the motorcycle. It is for this reason.

Between the various suspension movements and rotational movements about the axis 58, the strut 20 and the universal joint 4 The transmission operation is ensured by the second driven sprocket 52 and the driving sprocket 54. It takes place.

There are many variations in the means for rotationally driving the front fork. Compactor instead of rocking rod A set of two arms, particularly articulated, forming a base may also be used.

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Claims (1)

[Claims] 1. The frame (12) that supports the engine (14) and the lower end of the fork (16) a front wheel (18) rotatably attached to the fork (16) and the frame. (12) and between the engine and front wheels. and a transmission passing through the struts forming a housing. In the steering suspension device for Tobai, the upper end of the front fork (16) and said fork (16) in the plane of the motorcycle. means for guiding (88) and rotating said fork about a steering axis (58); and second means (104, 116, 120) for guiding Rudder suspension device. 2. The first guide means consists of a triangular member (88), which triangular member The frame is rotatably mounted around an axis (100) perpendicular to the plane of the frame. a free branch (90) fixed to the fork and a small The point (92) is pivotably mounted so that both have two degrees of freedom. The apparatus according to claim 1, characterized in that: 3. Each branch (90) is provided with a slot (102) through which the second guide means passes. Apparatus according to item 2 of the scope of request. 4. at least one upper connection connecting said second guide means with a free end to a rudder; a rod (120) and at least one rod (120) having a free end connected to the upper end of said fork; Consisting of a swinging rod (116) located between the lower connecting rod (104) An apparatus according to claim 1, 2 or 3, characterized in that: 5. The lower connecting rod (104) is connected to a groove provided in the branch (90) of the triangular member. According to any one of the preceding claims, characterized in that the hole (102) extends through the hole (102). equipment. 6. Particularly, the swing rod (116) is rotatably attached to the frame. A device according to any one of the preceding claims, characterized in that it is characterized by: 7. A pole joint is provided at the end of each of the connecting rods (106, 108, 118). A device according to any of the preceding claims. 8. A first transmission (36) housed in the column (20) is attached to the fork (116). ) driven by a driven subrocket (52), and a second subrocket housed in the fork. a drive subrocket (54) that drives the front wheels (18) by a speed gear (62); A drive universal joint (48) having free ends (44, 46) fixed to each side is provided. An apparatus according to any one of the preceding claims, characterized in that: 9. A third transmission that directly engages the engine is connected to the first transmission (36) housed in the pillar. Each of the above claims is characterized in that a one-way clutch driven by a speed gear is provided. The device described in any of the above. 10. The second transmission housed in the fork has a driven subrocket of the second transmission. Each of the above claims is characterized in that a braking means (74) is provided which acts directly on the The device described in any of the above.