JPS64399Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc brake device mainly applied to the front wheel of a motorcycle.

Conventionally, as this type of device, an annular brake disc is fixed on the outer circumferential side of the rotatable wheel hub on the axle that is supported on the front fork or other vehicle body frame, and the inner circumferential side is fixed on the side surface of the rotatable wheel hub on the axle that is supported on the front fork or other vehicle body frame. A pair of inner and outer opposing walls projecting into the space formed in the disc and spanning the inner circumferential side of the disk, and a pair of pads facing on both sides of the disk and the pads are pressed against the opposing walls. It is known that a caliper member provided with a pressing member is supported on a bracket member on the vehicle body frame side, but in this case, the caliper member is supported on the bracket member side via a pair of left and right pins. This is a general method in which positioning and braking force transmission are performed using a pair of pins.In such a system, relatively large frictional resistance is likely to occur when the pins slide, and in preparation for the transmission of the braking force, the pins are It requires high processing precision and relatively high strength, and has the disadvantages of being troublesome and relatively expensive to manufacture.

The purpose of the present invention is to obtain a device free from such inconveniences, and an annular brake disc 4 is attached to the side surface of a rotatable wheel hub 3 on an axle 2 supported on a front fork or other vehicle body frame 1.
is fixed on its outer circumferential side, and its inner circumferential side is protruded into a space formed on the side surface of the wheel hub 3, and a pair of inner and outer opposed wall portions 7a, 7a straddle the brake disc 4 from its inner circumferential side. and a caliper member 7 supported by the opposing walls 7a, 7a and comprising a pair of pads 5, 5 facing both sides of the brake disc 4, and a pressing member 6 for pressing the pads 5, 5. In the case where the caliper member 7 is supported by the bracket 8 on the side of the vehicle body frame 1, the caliper member 7 is inserted into a space formed on the side surface of the wheel hub 3, and
A pin 10 passing through the inner peripheral side of the brake disc 4 and fixed horizontally between the opposing walls 7a, 7a of the caliper member 7, It is characterized in that it is engaged with and supported by the bracket 8 via both side edges 9, 9 formed at the front and rear.

The drawing shows a case in which it is applied to the front wheel of a motorcycle.The body frame 1 consists of a pair of left and right front forks, and the axle 2 extends laterally between the ends of the front forks and is fixed thereto. The hub 3 is fitted and supported on its outer periphery via a pair of left and right ball bearings 18, 18. The brake disc 4 is formed into an annular shape, and its outer circumferential side is fixed to each side of the wheel hub 3 with bolts 19, and its inner circumferential side is provided so as to protrude into the space formed on the side surface of the hub 3. The caliper member 7 is provided on each outer side of the caliper member 7 so as to straddle the caliper member 7 from the inner circumferential direction. That is, the caliper member 7
is provided with a pair of inner and outer opposing walls 7a, 7a that straddle the disk 4 from the inner circumferential side, and a pair of pads 5, 5 facing the inner surface of the disk 4 and a pair of pads 5, 5 on the walls 7a, 7a. A pressing member 6 consisting of a caliper piston for pressing is provided.

The bracket member 8 is in the shape of a disk with an outer diameter approximately equal to that of each brake disc 4, and is fitted onto and supported on the axle 2 through a shaft hole 11 at the center thereof, and is opposed to the front fork 1 on the outside thereof. It is connected to the surface by a convex part 12 and a concave part 13 so that rotation is prevented therefrom. Further, the caliper member 7 has parallel upper and lower side edges 9, 9, which are inserted into the lateral engagement groove 14 formed in the bracket member 8 and are inserted into the upper and lower side edges 15 of the engagement groove 14. . It was decided that they should be slidably engaged. Furthermore, in the illustrated example, each pin 1 is placed above and below the pin 10.
7, which serves to laterally insert and guide the pad bases 5a, 5a holding the pads 5, 5.

To explain its operation, according to the operation of the caliper member 7, the pair of pads 5, 5 close each other and clamp the brake disc 4, applying braking force to it, which is different from the conventional one. Although not particularly different from the above, during such operation, the member 7 is connected to and supported by the bracket member 8 via its both side edges 9 and one pin 10 located approximately in the center, and the member 7 Positioning and transmission of braking force are performed by the side edges 9, 9 and the pin 10.

In this way, according to the present invention, the caliper member 7 that straddles the inner peripheral surface of the brake disk 4 fixed to the side surface of the wheel hub 3 is inserted into the space formed on the side surface of the wheel hub 3, and One pin 1 is horizontally fixed between the opposing wall surfaces 7a and 7a of the caliper member 7 through the inner peripheral surface of the caliper member 7.
0 and both side edges 9, 9 formed on both sides of the brake disc 4 in the rotating direction with the pin 10 sandwiched therebetween, the caliper is engaged with and supported by the bracket 8 on the vehicle body frame 1 side. The member 7 is supported and stably held at three points on the bracket 8, so that stable contact can be obtained between the disk 4 and the pads 5, 5, and the pin 10 is connected to a pair of inner and outer opposing walls that sandwich the disk 4. Both ends are supported by the pins 7a and 7a, which not only increases the strength of the pin itself but also serves to reinforce the caliper member 8, which is advantageous in terms of its mounting strength.
Furthermore, since the caliper member 7 is supported at a location closer to the axle 2 on the inner circumferential side of the disk 4, its support is stabilized.

[Brief explanation of the drawing]

FIG. 1 is a side view of one example of the device of the present invention, and FIGS. 2 to 4 are cross-sectional views taken along the - line, - line, and - line. DESCRIPTION OF SYMBOLS 1... Body frame, 2... Axle, 3... Wheel hub, 4... Brake disk, 5, 5... Pad, 6... Pressing member, 7... Caliper member, 7a... Opposing wall part, 8... Bracket member, 9, 9... Both side edges, 10... pins.

Claims (1)

[Scope of utility model registration request] An annular brake disc 4 is fixed on the outer circumferential side of a rotatable wheel hub 3 on a wheel 2 supported by a front fork or other vehicle body frame 1, and the inner circumferential side of the wheel hub 3 is A pair of inner and outer opposing walls 7a, 7a protrude into a space formed on the side surface and straddle the brake disk 4 from the inner circumferential side; A caliper member 7 having a pair of pads 5, 5 facing each other and a pressing member 6 for pressing the pads 5, 5 is supported by a bracket 8 on the side of the vehicle body frame 1. into the space formed on the side surface of the wheel hub 3, and the brake disc 4
The opposing wall portion 7 of the caliper member 7 passes through the inner peripheral side of the caliper member 7.
A single pin 10 horizontally fixed between a and 7a,
A disc brake device characterized in that the bracket 8 is engaged with and supported via both side edges 9, 9 formed at the front and rear sides of the brake disc 4 in the rotational direction with the pin 10 in between.