JPS63291783A - Front fork - 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 (Field of Industrial Application) The present invention relates to an improvement of a front fork that supports a front wheel of a two-wheeled vehicle.

(Prior art) In a 70mm (70mm) 7r-ri that supports the front wheel of a two-wheeled vehicle, for example, an inner tube connected to the vehicle body is slidably inserted into an outer tube connected to the axle, and these are held resiliently by a suspension spring. Hydraulic oil is sealed inside the actuator tube, and as the actuator tube and inner tube slide, this hydraulic oil is designed to absorb shock due to the resistance generated when it flows inside the actuator tube.

The front fork is placed on both sides of the front wheel in a backward-leaning state, and on motorcycles with disc brakes on the front wheel,
Some models have a brake caliper that brakes the front wheel disc attached to the outer tube via a bracket.

(Problems to be Solved by the Invention) During a run, when the axle is pushed up due to unevenness on the road surface, this pushing up force exerts a component force in the axial direction and the transverse direction on the rear-leaning 70-ton 7-year-old.

Of these, the axial component force causes the outer tube and the inner tube to slide, but the transverse component force conversely increases the initial frictional resistance against the start of sliding, making sliding difficult. Therefore, in order for the front 7 oak to start operating, a component force in the wheel direction that exceeds this initial frictional resistance is required.
As a result, there was a problem in that small shocks such as minute vibrations were not absorbed and were directly transmitted to the vehicle body, adversely affecting ride comfort.

In addition, when forming the support part of the brake caliper in a 7-way configuration, if the brake caliper is installed only on one side of the wheel and is a single caliper, the torque reaction force transmitted from the disc to the brake caliper during braking will support the brake caliper. Since it only acts on the 7-way ace on the side that is moving, the load on the left and right front 7-oak becomes uneven, causing the problem that the steering wheel tends to swing to one side.

In order to solve the above problems, the present invention provides a front fork that is excellent in absorbing minute vibrations and has a function of dispersing the reaction force of the braking torque acting through the brake caliper to both sides of the wheel. The purpose is to

(Means for Solving the Problems) The present invention provides for slidingly inserting an inner tube connected to the front wheel of a two-wheeled vehicle inside an outer tube connected to the axle of the front wheel, and disposing these inner tubes on both sides of the wheel. At the same time,
In a front fork, in which the brake caliper that brakes the front wheel is supported by the outer tube, the axle and the outer tube are connected through the push of an elastic material, and are integrated on both sides of the wheel around a connecting shaft that passes through the center of the axle as a fulcrum. A pair of rotating links are connected to the middle part of the outer tube so that they can each be slightly rotated, and an elastic material is interposed between the links and the outer tube to restrict the rotational displacement of these links. Brake calipers are installed on one or both.

(Operation) During braking, the link to which the brake caliper is attached tries to rotate in any direction around the connecting shaft due to the reaction force of the braking torque, but this torque is transmitted to the link on the opposite side through the axle, and the link on the opposite side receives the reaction force of the braking torque. are biased in the same direction. As a result, both links slightly rotate forward while deforming the elastic material interposed between them and the front fork.
The reaction force of braking torque is distributed to 70 tons on both sides. On the other hand, since the impact received by the axle is transmitted to the outer tube after deforming the push of the elastic material, even small impacts that do not cause the outer tube and the inner tube to slide are absorbed by the deformation of this push.

(Example) Embodiments of the present invention are shown in FIGS. 1 to 8.

In the tJrJ1 diagram, 1 is an outer tube, into which an inner tube (not shown) connected to a handle is slidably inserted. A bracket 7 is formed at the lower end of the outer tube 1, and the axle 2 is supported inside the bracket 7 via a rubber pusher 12. The axle 2 is formed in the shape of a hollow pipe, and holders 13 for holding the rubber pusher 12 between the bracket 7 and the bracket 7 are formed on the outer periphery of both ends, and a connecting shaft 11 freely rotates through the center. One end of a link 3 is integrally connected to one end of this connecting shaft 11 that protrudes on both sides of the axle 2 by fitting with different diameters such as a spline or a ceresitan, and another link shown in FIG. 3 is also connected to the opposite end. One end of 3A is joined in the same way. The link 3 is formed in an abbreviated shape that wraps around from the axle 2 to the rear of the outer tube 1 and extends upward along the outer tube 1, and a bracket protrudes rearward from the upper part of the link 3 and the middle part of the outer tube 1. 4 are connected via bolts 5. This bolt 5 passes through the upper part of the link 3 and the bottle hole 4A formed in the bracket 4.
A is loosely tightened. The bottle hole 4A is formed to have a larger diameter than the bolt 5, holds a rubber pusher 6 made of an elastic material inside thereof, and the bolt 5 is configured to be able to be displaced within the deformation range of the rubber pusher 6. A brake caliper 8 is fixed to the upper part of the link 3 facing the brake disc 9. For this purpose, a mounting hole 10 is formed in the link 3.

Further, one link 3A fixed to the opposite side of the connecting shaft 11 is also formed in an abbreviated shape as shown in FIG. It is connected to the bracket 4 of the outer tube 1.

Next, the action will be explained.

During braking, the brake caliper 8 is urged forward by the reaction force of the braking torque exerted on the brake disc 9.
The link 3 compresses and deforms the rubber push 6 through the bolt 5 and slightly rotates in the direction C in the figure about the connecting shaft 11 as a fulcrum. This rotational moment is transmitted to the link 3A on the opposite side through the connecting shaft 11, and the link 3A is similarly rotationally displaced to elastically deform the rubber push 6. In this way, the reaction force of the braking torque acting on the link 3 is transmitted to the link 3A on the opposite side via the connecting shaft 11, and the load is distributed to the front 7 oaks 1 on both sides, so that the steering wheel swings during braking. There is no risk that this phenomenon will occur.

By the way, when the impact is transmitted from the road surface to the axle 2 while driving, if the direction of action is, for example, the direction A in the figure, then the shock is transmitted to the axle 2 from the rubber pushers 6 and 12.
The links 3 and 38 are displaced in the same direction while being elastically deformed, and in the B direction, the links 3 and 3A are rotationally displaced about the bolt 5 while mainly elastically deforming only the rubber push 12.

These displacements are hardly affected even when the rubber push 6 is compressively deformed in the C direction due to braking, and the axle 2
Whenever a shock is transmitted to the outer tube 1, the rubber pusher 12 is always elastically deformed. Therefore, regardless of whether the vehicle is braking or not, small shocks that do not cause the outer tube 1 and the inner tube to slide are absorbed by the rubber push 12 and are not transmitted to the vehicle body, allowing the vehicle to ride comfortably.

4 and 5 show links 3 and 3A and a brake caliper 8 in front of the outer tube 1, and in this case also the same effect as in the above embodiment can be obtained.

Note that the outer tube 1 does not necessarily need to be located directly above the axle 2, and by changing the formation position of the bracket 7, it can also be used for a leading axle type front fork or a trailing axle type front fork as shown in Figures 6 to 8. It is possible to implement. Also, as shown in Figure 1j'S8, J%llllI2 is formed on the central axis, and links 3 and 3
A to the axle 2, and the bracket 7 of the outer tube 1
If the axle 2 and the axle 2 are rotatably connected, the axle 2 and the connecting shaft 1
1 can also be used.

Further, the present invention is not limited to a brake system with a single caliper, but also in a double caliper, by connecting a brake caliper to each link, a predetermined good effect is brought about.

(Effects of the Invention) As described above, the present invention connects the outer tube and the axle via the rubber pusher, and also allows the brake caliper and the outer tube that supports it to rotate together via the connecting shaft. Because a pair of links are interposed, the rubber push always deforms before the shock is transmitted from the axle to the outer tube, and a small shock that does not cause the outer tube and inner tube to slide causes the rubber push to elastically deform. At the same time, the reaction force of the braking torque is dispersed through the links to the front 7 oaks on both sides, thereby preventing the steering wheel from shaking during braking.

In other words, it has good absorption of small vibrations and excellent steering stability during braking, which has a great effect on improving the riding comfort of motorcycles.

[Brief explanation of the drawing]

Fig. fjS1 and Fig. 2 are side views of the front 7 oak axle support part showing the t51 embodiment of the present invention, Fig. f53 is a sectional view of the same, and Fig. vJ4 and Fig. 15 are the side views of the front 7 oak axle support part showing the t51 embodiment of the present invention. A side view of the axle support part of the front 7 oak showing the second embodiment, FIGS. 8th
The figure is also a sectional view. 1...Outer tube, 2...Axle, 3,3A...
・Link, 6.12...Rubber push, 8...Brake caliper, 11...Connection shaft. Figure 1 Figure 5 Figure 7 Figure 6 Figure 8 Procedural amendment July 3, 1988 1. Case description 1988 Patent Application No. 124928 2. Name of the invention Front fork 3. Amendment Relationship with the case filed by the person filing the patent application Patent applicant address World Trade Center Building 2-4-1 Hamamatsucho, Minato-ku, Tokyo Name (092) Kayabae Gyo Co., Ltd. 4 "Detailed Description" and 1. "Brief Description of Drawings" columns and drawings. 7. Contents of the amendment (1) The scope of claims in the specification will be amended as shown in the attached sheet. T2) On page 3 of the specification, from fi line 19 to line 200, the phrase [distributed to both sides of the wheel] is corrected to "distributed to the left and right front forks." (3) From the 3rd line to the 4th line on the 4th page, the phrase ``inside the outer tube'' is corrected to ``in the outer tube.'' (4) In the 20th line of page 4, the phrase "through the axle" is corrected to "through the wheel or connecting shaft." (5) On the 8th page of the same page, the 20th line of vJ reads "Figs. 6 to 8" and is corrected to ir "Figs. 6 and 7." (6) In the 16th line of page 10, the statement ``FIG. 8 is also a cross-sectional view'' has been corrected to read ``FIG. 8 is a cross-sectional view of an embodiment in which the axle is formed as a center axis.'' (7) In the drawings attached to the specification, I! Figure 12 J fjS
Figure 8 is corrected as shown in the attached sheet. [Claims] An inner tube connected to the vehicle body is slidably inserted into an outer tube connected to the JrL axis of the front wheel of a two-wheeled vehicle, and these are arranged on both sides of the 111 wheel, and a brake caliper for braking the front wheel is provided. In the front 7 oak supported by the outer tube, the axle and the outer tube are connected by pushing an elastic material, and one-elbow links rotate together on both sides of the wheel around a connecting shaft that passes through the center of the axle as a fulcrum. Each link is connected to the intermediate portion of the outer tube so as to be able to rotate slightly, and an elastic material is interposed between the link and the outer tube to restrict the rotational displacement of these links.
A front fork characterized by a brake caliper attached to one or both of these links. ”

Claims (1)

[Claims] The inner tube connected to the vehicle body is slidably inserted inside the outer tube connected to the axle of the front wheel of a two-wheeled vehicle, and these are arranged on both sides of the wheel, and the brake caliper that brakes the front wheel is supported by the outer tube. In this front fork, the axle and the outer tube are connected through a push of elastic material, and a pair of links that rotate together on both sides of the wheel about a connecting shaft passing through the center of the axle are attached to the middle part of the outer tube. Each link is connected to allow a slight rotational displacement, and an elastic material is interposed between the link and the outer tube to restrict the rotational displacement of these links, and a brake caliper is attached to one or both of these links. and front fork.