JPH07102796B2 - Hydraulic disc brake device for front wheels of saddle type vehicle for rough land traveling - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic disc brake device most suitable for a saddle type vehicle for traveling on rough terrain, and more particularly, to reliably protect the connection portion of the brake hose. Related to the structure.

[Conventional technology]

Generally, saddle-ride type vehicles have an engine mounted in the approximate center of the body frame, wheels with wide ultra-low pressure tires mounted on the front and rear, and steering handles, fuel tanks, and saddle-type seats arranged in order from the top to the top. Therefore, it is a vehicle suitable for running on rough terrain such as a rocky place and a mud, and is recently used for sports running or leisure.

By the way, in the above-mentioned vehicle, a hydraulic disc brake device may be adopted from the viewpoint of strengthening the braking force. This brake device is designed to hold a disc plate by a caliper unit to brake, and when connecting a hydraulic pressure supply brake hose to this caliper unit, it is common to use a so-called banjo as a connecting fitting. Is low in cost and has excellent workability in assembly. Generally, a banjo has a shape as shown in FIG. That is, the banjo 41 is configured by forming an annular groove 41b in the inner surface of a flat ring-shaped joint portion 41a, integrally forming an introducing pipe portion 41c therein, and connecting this to one end of the brake hose body 42. There is. When connecting the banjo 41 to the hydraulic pressure supply port 43, the connection bolt 4 having the communication hole 44a formed therein is formed.
4 is screwed into the hydraulic pressure supply port 43.

[Problems to be solved by the invention]

However, when the brake hose is connected to the caliper unit arranged in the wheel rim with the banjo, as shown in FIG. 5, this connecting fitting portion projects outward in the direction perpendicular to the axis of the hydraulic pressure supply port 43. Will be done. In particular, this type of saddle riding type vehicle for running in the wasteland allows the caliper unit to be operated as in the conventional case when, for example, when running sports on a rocky place or a place where weeds and weeds of about the same height are scratched. If the banjo 41 connected to the vehicle is fogged out of the wheels, there is a high possibility that the banjo 41 or the like will be hit by an obstacle such as the abovementioned miscellaneous trees. Further, the front wheels of this type of vehicle are arranged at the foremost end of the vehicle, and from this point as well, the banjo 41 is likely to be hit by the obstacle.

Furthermore, in this type of vehicle, in the above sports driving,
In some cases, so-called sliding travel is performed, in which the steering wheel is turned while sliding, and in such a case, the banjo 41 is straight ahead with the banjo 41 visible from the front. It becomes easier to hit by rocks, etc. Therefore, conventionally, it is necessary to separately provide a protective cover in order to avoid collision of the obstacle.

The present invention has been made in view of the above conventional problems, and does not require a protective cover, and is a hydraulic type for front wheels of a saddle riding type vehicle for traveling in rough land in which an obstacle does not hit the brake hose connection portion. The object is to provide a disc brake device.

[Means for solving problems]

The present invention relates to a hydraulic disc brake device for front wheels of a saddle-ride type vehicle for running on rough terrain, in which a disc plate is fixed to a wheel hub so as to be located inside a wheel rim, and the disc plate is sandwiched and braked by a pair of calipers. The unit is fixed to the knuckle bracket so as to be located inside the wheel rim and on the front side of the axle, and the hydraulic pressure supply port of the caliper unit is opened substantially rearward of the vehicle. A straight tubular continuous metal fitting extending in the axial direction is screwed, one end of a flexible hose is fixed to the connecting metal fitting, the flexible hose extends in the axial direction of the connecting metal fitting, and the vehicle width is wider than the knuckle bracket. The feature is that it is extended to the rear of the vehicle so as to pass inside in the direction.

[Action]

In the vehicle hydraulic disc brake device according to the present invention,
The connecting metal fitting extends in the axial direction of the hydraulic pressure supply port that is opened rearward of the caliper unit arranged in the wheel rim, and therefore the connecting metal fitting is located in the wheel rim without protruding outward. , Even when steering, this connecting fitting is barely exposed to the outside when viewed from the front,
As a result, the wheel rim functions as a protective cover, and it is possible to prevent an obstacle from colliding with the connection fitting without separately providing a protective cover.

In addition, the caliper unit is arranged in front of the axle, and the flexible hose connected to the above-mentioned connecting fitting is extended toward the rear of the vehicle through the upper and lower boss portions inside the knuckle bracket in the vehicle width direction. The flexible hose can be routed rearward of the vehicle while reasonably avoiding interference with the axles, wheel rims, etc. while being connected rearward from the internal caliper unit, and the connection fitting can also be protected by the knuckle bracket.

〔Example〕

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

1 to 4 are views for explaining a hydraulic disc brake device for a vehicle according to an embodiment of the present invention.
This embodiment is an example applied to a hydraulic disc brake device for front wheels of a saddle-ride type vehicle for traveling on rough terrain. In the figure, reference numeral 1 is a steel pipe body frame, and a front bumper 5, a front fender 19, a front unlit 20, and a rear bumper 6 and a rear fender 18 are arranged at the front portion of the body frame 1, respectively. At the top,
From the front, a steering handle 15, a fuel tank 16 having a tank cover 16a, and a saddle type seat 17 are mounted. An engine 8 coupled to the crankcase 7 is mounted substantially in the center of the body frame 1, and rear wheels 14 with wide ultra-low pressure tires are mounted to the rear left and right through a rear arm 13. A rear wheel suspension device 12 is arranged between the rear arm 13 and the vehicle body frame 1.

Further, front wheels 11 with wide ultra-low pressure tires are also mounted on the left and right front portions of the vehicle body frame 1 via a double wishbone type front wheel suspension device 22. This front wheel suspension
Reference numeral 22 denotes an upper arm 23, a lower arm 24 which are suspension arms, a knuckle bracket 25, and the bracket 25.
A ball joint 26 that connects the upper and lower bosses 25a of the vehicle to the arms 23 and 24, the single frame 1 and the lower arm.
The front wheel 11 is rotatably mounted on an axle 25a integrally formed with the knuckle bracket 25. The front wheel 11 is configured such that a wheel rim 11b, to which a wide ultra low pressure tire 11a is mounted, has a wheel hub 11c fixed to the center thereof.

A disc plate 31 is bolted and fixed to the inner surface of the wheel hub 11c, and the disc plate 31 is located inside the wheel rim 11b. Also,
The knuckle bracket 25 has a caliper unit 32,
It is mounted so as to be located in front of the axle 25a and inside the wheel rim 11b, and inside the unit 32, a pair of calipers 32a are arranged so as to face each other with the disc plate 31 interposed therebetween. The hydraulic pressure supply port 32b of the caliper unit 32 is opened rearward of the vehicle body when seen in a plan view (see FIG. 1), and the hydraulic pressure supply port 32b is internally threaded.

The lower end of the hydraulic supply brake hose 33 is screwed into the hydraulic supply port 32b. This brake hose 33
The hose body 33a is equipped with a protection spring 33b, the upper end thereof is connected with the connecting fitting 33c, and the lower end thereof is connected with the connecting fitting 33d. Banjo is adopted for the upper connection fitting 33c,
A straight tube is adopted as the lower connecting fitting 33d, a male thread is applied to a tip end 33e of the lower connecting fitting 33d, and the leading end 33e is screwed to the hydraulic pressure supply port 32b. Thus, the lower connecting portion of the brake hose 33 extends between the upper and lower boss portions 25a, 25a on the inner side in the vehicle width direction of the knuckle bracket 25 in the axial direction of the hydraulic pressure supply port 32b, that is, substantially rearward of the vehicle. And brake hose 33
Further extends along the upper arm 23, the upper end of which is connected to a joint 34 provided at the front of the frame 1 by a banjo 33c.
Connected through. 23a is the brake hose 3
A clamper for clamping 3 to the upper arm 23. The joint 34 is connected by a main hose 35 to a master cylinder (not shown) mounted on the steering handle 15.

Next, the function and effect of this embodiment will be described.

In the conventional brake hose mounting structure, since the banjo was used as a connecting fitting for connecting the brake hose to the hydraulic pressure supply port, the connecting metal fitting portion protrudes outward in the direction perpendicular to the axis of the hydraulic pressure supply port, especially during steering. There was a problem that the vicinity of the connection fitting of the brake hose 33 was exposed to the outside when viewed from the front, and the obstacle was liable to hit as it was. On the other hand, in this embodiment, the caliper unit is attached to the lower end of the brake hose 33.
Since a straight tubular lower connecting fitting 33d extending in the axial direction of the hydraulic supply port 32b opened rearward of 32 is provided and the brake hose 33 is connected to the caliber unit 32 by the connecting fitting 33d, the connecting fitting 33d is a wheel. Located in the rim 11b,
There is no protrusion to the outside, and even during steering, the connection fitting 33d is hardly exposed to the outside when viewed from the front. Therefore, it is possible to prevent an obstacle from hitting the lower connection fitting 33d without the need for a conventional protective cover. Further, since the caliper unit 32 is arranged in front of the axle 25a and the brake hose 33 is arranged so as to pass inside the knuckle bracket 25 in the vehicle width direction, the connecting metal fitting 33d is screwed toward the rear of the vehicle to brake. The hose 33 can be routed while avoiding interference with the axle 25a, the wheel rim 11b, etc. without difficulty.

In the above embodiment, the hydraulic disc brake device for the front wheels has been described, but the present invention can of course be applied to the brake device for the rear wheels. Further, although the brake device for the straddle-type vehicle has been described in the above embodiment, the present invention is not limited to the vehicle as described above, and can be applied to any vehicle, for example, a hydraulic disc brake for a motorcycle. It can also be applied to devices.

〔The invention's effect〕

As described above, according to the vehicle hydraulic disc brake device of the present invention, the hydraulic pressure supply port to the caliper unit disposed on the front side of the axle in the wheel rim is opened substantially rearward of the vehicle to be flexible. Since the flexible hose is connected to the hydraulic supply port with a straight tubular connecting fitting that extends in the axial direction of the hydraulic supply opening, the connecting fitting portion of the flexible hose is located inside the wheel rim and projects outward. Even when steering, it is hardly exposed to the outside when viewed from the front, that is, this wheel rim protects the connection fitting part, and there is an effect that a conventional protective member can be eliminated, and The caliper unit is located on the front side of the axle and the flexible hose is extended rearward so as to pass between the upper and lower bosses on the inner side of the knuckle bracket in the vehicle width direction. Also be protected by Tsu preparative, also it has the effect of a flexible hose with screwed toward the fitting to the vehicle rear axle, can-installing to avoid reasonably interference with the wheel rim or the like.

[Brief description of drawings]

1 to 4 are for explaining a hydraulic disc brake device for a vehicle according to an embodiment of the present invention. FIG. 1 is a sectional plan view thereof, FIG. 2 is a side view thereof, and FIG. Is a front view thereof, FIG. 4 is a side view of a saddle-ride type vehicle to which the above embodiment is applied, and FIG. 5 is a sectional view showing a conventional connecting fitting. In the figure, 11b is a wheel rim, 11c is a wheel hub,
Reference numeral 31 is a disc plate, 32 is a caliper unit, 32a is a caliper, 32b is a hydraulic supply port, 33 is a brake hose (flexible hose), and 33d is a connecting fitting.

Claims (1)

[Claims] 1. A knuckle bracket for supporting a front wheel with a wide ultra-low pressure tire by an axle projecting outward in a vehicle width direction, and a pair of upper and lower rockers for supporting a pair of upper and lower boss portions formed on an inner surface of the knuckle bracket. In a hydraulic disc brake device for a front wheel of a saddle riding type vehicle for traveling on rough terrain having a front wheel suspension device having a moving arm, the disc plate is fixed to a wheel hub so as to be located inside a wheel rim, and the disc plate is fixed. A caliper unit for sandwiching and braking by a pair of calipers is fixed to the inside of the wheel rim, and fixed to the knuckle bracket so as to be positioned in front of the axle, and the hydraulic pressure supply port of the caliper unit is opened substantially rearward of the vehicle, A straight tubular sustaining fitting extending in the axial direction of the supply opening is screwed to the hydraulic supply opening, and a flexible hose is attached to the connecting fitting. The flexible hose extending in the axial direction of the connecting fitting and extending rearward of the vehicle so as to pass between the upper and lower boss portions on the inner side in the vehicle width direction of the knuckle bracket. Is connected to a master cylinder arranged on the steering handle, and a hydraulic disc brake device for front wheels of a saddle-ride type vehicle for traveling on rough terrain.