JP2610263B2 - Brake caliper support structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a brake caliper support structure for braking a front wheel of a motorcycle.

(Prior Art) In a motorcycle having a disk brake on a front wheel, a brake caliper for braking the front wheel disk is often supported by a front fork. For example, a bracket is protruded from the lower part of the front fork, and the brake caliper is fixed to this bracket with bolts or the like so as to face the brake disc.

(Problems to be Solved by the Invention) In this case, if the brake caliper is a single caliper attached to only one of the front forks disposed on both sides of the front wheel, the torque transmitted from the disc to the brake caliper during braking is applied. The reaction force acts only on the front fork that supports the brake caliper, and as a result, an uneven load acts on the left and right front forks,
There has been a problem that the handle supported by these front forks tends to swing to one side. On the other hand, such a problem does not occur in the twin caliper provided with the brake caliper and the brake disc on both the left and right sides, but the cost and weight are increased as compared with the single caliper.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to distribute braking reaction force of a brake caliper disposed on one side of a wheel evenly to front forks on both sides of the wheel.

(Means for Solving the Problems) The present invention provides a brake caliper supporting structure in which a brake caliper disposed on one side of a front wheel of a motorcycle is supported by a front fork interposed between the axle and the vehicle body. The ends are fixed to both ends, and a pair of links that rotate periodically via an axle are connected to the middle part of the front fork so that they can be slightly rotated, and elastic materials that restrict the rotation of these links are linked. And a front fork, and one of these links supports the brake caliper.

(Operation) The link supporting the brake caliper tries to rotate forward with the axle as a fulcrum due to the reaction force of the braking torque, but this torque is transmitted to the opposite link through the axle, and the opposite link is moved in the same direction. Energize to. As a result, both the links are slightly rotationally displaced forward while compressing and deforming the elastic member interposed between the front forks, respectively, and the reaction force of the braking torque is distributed and received by the front forks on both sides.

(Embodiment) FIGS. 1 to 4 show an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an outer tube of a front fork, which supports an axle 2 of a front wheel via a bracket 7 and connects an inner tube (not shown) sliding inside to a handle. One end of a link 3 is integrally connected to the axle 2 by fitting different diameters such as splines and serrations, and another link shown in FIG.
The ends of 3A join together as well. The link 3 wraps around the rear end of the outer tube 1 from the axle 2 and is formed in a substantially L-shape extending upward along the outer tube 1. A bracket 4 projecting from an upper portion of the link 3 and an intermediate portion of the outer tube 1 is provided. Are connected via bolts 5. This bolt 5
Penetrates through the upper part of the link 3 and the pin hole 4A formed in the bracket 4, and tightens the inner collar of the rubber bush 6 with the nut 5A. The pin hole 4A is formed to have a diameter larger than that of the bolt 5 and holds an elastic rubber bush 6 inside thereof. The bolt 5 is configured to be displaceable within a deformation range of the rubber bush 6. A brake caliper 8 is fixed above the link 3 so as to face the brake disc 9. For this purpose, a mounting hole 10 is formed in the link 3.

The other link fixed to the opposite side of axle 2
2A is also formed in a substantially L-shape as shown in FIG. 2, and the upper end thereof is connected to the bracket 4 of the outer tube 1 via a bolt 5 and a rubber bush 6 similar to the link 3.

 Next, the operation will be described.

At the time of braking, the brake caliper 8 is urged forward by receiving the reaction force of the braking torque exerted on the brake disk 9, and the link 3 compresses and deforms the rubber bush 6 via the bolt 5 while using the axle 2 as a fulcrum. It is slightly displaced clockwise. This rotational moment is transmitted to the opposite link 3A through the axle 2, and the link 3A is similarly rotationally displaced to compress and deform the rubber bush 6. Link 3
Is applied to the link 3A on the opposite side via the axle 2.
Transmitted to the front forks 1 on both sides, the loads acting on the front forks 1 are substantially balanced, and there is no possibility that the handle may be swung due to the load imbalance.

Since the transmission distance of the torque is different between the brake caliper 8 side and the opposite side, there is a slight difference in the load exerted on the left and right outer tubes 1 by the reaction force of the braking torque. Therefore, if the rubber bush 6 on the brake caliper 8 side is set to be softer than the opposite side, or if the position of the bolt 5 of the link 3 is set closer to the axle 2 than the link 3A, the difference in torque transmission distance can be reduced. By compensating, the load burden on the left and right front forks 1 can be further equalized.

Further, instead of the rubber bush 6, a pin hole 4A may be formed in a long hole as shown in FIG. 4, and a cushion 11 may be attached in the middle of the links 3 and 3A to make contact with the outer tube 1 respectively.

(Effect of the Invention) As described above, according to the present invention, a pair of links having ends fixed to both sides of the axle are connected to the intermediate portions of the front forks on both sides via elastic materials, and one of these links is braked. Since the caliper is supported, the reaction force of the braking torque acting on the link at the time of braking is transmitted to the opposite link through the axle, and the links on both sides compress and deform the elastic material, respectively, to distribute the reaction force to the front forks on both sides. For this reason, it is possible to prevent a unique handle swing phenomenon when the brake caliper is arranged on one side of the wheel.

In addition, the present invention has a simple structure and can save a great deal of cost and weight compared to a so-called twin caliper in which brake calipers are arranged on both sides of an axle.

[Brief description of the drawings]

1 and 2 are side views of an axle support portion of a front fork showing an embodiment of the present invention, FIG. 3 is a sectional view of the same, and FIG. It is a side view of an axle support part. 1 ... outer tube, 2 ... axle, 3 ... link, 6
... rubber bush, 8 ... brake caliper.

Claims (1)

(57) [Claims] 1. A brake caliper support structure for supporting a brake caliper disposed on one side of a front wheel of a two-wheeled vehicle with a front fork interposed between an axle and a vehicle body, wherein ends are fixed to both sides of the axle. A pair of links that rotate synchronously via an axle are connected to the intermediate portion of the front fork so as to be slightly rotationally displaceable, and an elastic material for regulating the rotational displacement of these links is interposed between the link and the front fork. And a brake caliper support structure that supports a brake caliper on one of these links.