JPS6212916Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a so-called anti-nose type disc brake device for a two-wheeled motor vehicle.

Generally, when the brakes are applied to the front wheels, the vehicle body leans forward, which worsens the driver's posture and reduces maneuverability, so in order to prevent this,
An anti-nose type disc brake device as shown in FIGS. 2 and 3 has already been proposed in Japanese Patent Application No. 55-124915.

In FIG. 2, a caliper 16 consisting of a caliper main body 13, a bracket 14, and an arm 15 is arranged opposite to a brake disc 12 fixed to a front fork 11.
A rod 20 is attached between the steering bracket 17 of the front fork 11 and the steering bracket 17 of the front fork 11 through pins 18 and 19 in an automatically freely movable state. , a reaction force acts on the caliper 16 in the direction of arrow a, and in response to this reaction force, the rod 20 moves upward b
The front fork is pushed up to prevent the vehicle body 22 from moving forward. (Anti-nose) It's becoming like that. Therefore, the caliper 16 must be rotatable concentrically with the brake disc 12, that is, around the axis 24 of the shaft 23. Therefore, the bracket 14 of the conventional caliper 16 is as shown in FIG. As such, it was directly fitted onto the shaft 23.

Therefore, when replacing the wheel 21, the shaft 2
3 from the front fork 11, the caliper 16 falls off, so when assembling a new wheel 21, it is necessary to return the caliper 16 to a predetermined position and insert the shaft 23 therethrough. However,
Insert the bracket 14 of the caliper 16 into the narrow space between the wheel 21 and the front fork 11, and insert the shaft 23 into the insertion hole 25 of the bracket 14.
It is not easy to insert the wheel 21 into the wheel 21, and it is strongly desired to facilitate the above-mentioned work, especially in the case of a racer in which the wheel 21 must be replaced in a short period of time.

This invention was made in view of the above-mentioned problems, and the object thereof is to provide a disc brake device for a two-wheeled motor vehicle, which is an anti-nose type disc brake, but allows easy wheel replacement.

Embodiments of this invention will be described below with reference to the drawings.

In FIG. 1, a disk housing 27 is fixed to a wheel 26 of a wheel 21 with bolts 28,
A brake disc 12 is fixed to the housing 27 with screws 29, and a main body 13 of a caliper 16 is disposed to sandwich the brake disc 12 and apply pressure to the brake disc 12 to apply a brake. The caliper main body 13 is fixed to the bracket 14 with bolts 30,
This bracket 14 is loosely fitted into a mounting member 31 consisting of a collar press-fitted into the front fork 11, so that the caliper 16 is attached to the shaft 2.
It is rotatably supported around the axis 24 of No. 3.
A relatively large space 32 is provided between the wheel 21 and the front fork 11, and when the wheel 21 is attached to or detached from the front fork 11, the caliper 16 is moved within the space 32 as shown by the two-dot chain line. It is made to incline toward the outside d so that the wheel 21 passes in the direction of the arrow e.

The mounting member 31 is positioned within the space 32.
A spring 33 and a pressing plate 34 are attached to the
The spring force of the spring 33 presses the bracket 14 of the caliper 16 inward in the axial direction f through the pressing plate 34, so that the caliper 16 is held at a predetermined position in the axial direction g.
In order to ensure smooth rotational movement around the axis 24 , the inside of the pressing plate 34 is filled with lubricating oil and sealed with a sealing 35 .

In the above configuration, when removing the old wheel 21 for replacing the wheel 21, the shaft 23 is first extracted from the front fork 11. As a result, the wheel 21 falls off from the front fork 11, but at that time, the brake disc 12 first comes out of the caliper body 13, and then the caliper 16 is tilted outward d against the spring force of the spring 33. Then, the wide rim portion 37 of the wheel 21 can be passed downward h in the figure, thereby facilitating the removal of the wheel 21.
Since the mounting member 31 is attached to the front fork 11, it will not fall off even when the shaft 23 is pulled out.

When installing a new wheel 21, perform the operation in reverse to the above. That is, the caliper 16 is moved outward d.
Insert the wheel 21 into the upper part j of the figure while pressing it and tilting it. After returning the caliper 16 to the original position shown by the solid line, insert the brake disc 12 between the brake shoes 39 and 39 of the caliper body 13. into the shaft 2 and hold it in the position shown.
3 and fix it to the front fork 11 to complete the installation of the wheel 21. At this time,
Since the mounting member 31 remains attached to the front fork 11, the shaft 23 is attached to the mounting member 31.
This makes it easier to insert the wheel 21 into the wheel 21, and the work of installing the wheel 21 becomes easier.

As explained above, according to this invention, the caliper 16 is always attached to the front fork 11 via the mounting member 31 and can be tilted outward d so that the wheel 21 passes through. The replacement work becomes easier. Especially for racers where wheels need to be changed in a short time.
This idea is extremely effective.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a disc brake device showing an embodiment of this invention, and FIG. 2 is a side view showing an example of a conventional disc brake device.
FIG. 3 is a sectional view taken along line 3--3 in FIG. 2. 11...Front fork, 12...Brake disc, 16...Caliper, 21...Wheel, 2
3... Shaft, 24... Axial center, 31... Mounting member, 32... Space, 33... Spring.

Claims (1)

[Scope of utility model registration request] The caliper, which presses against the brake disc to apply the brake, is rotatably supported around the axis of the shaft via a mounting member attached to the front fork. An automatic vehicle 2 characterized in that a space is provided between the wheel and the front fork in which the caliper can be tilted outward so as to allow the caliper to pass through.
Disc brake device for wheeled vehicles.