JPH0460877B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a disc brake device for automobiles, and more particularly to a disc brake device most suitable for two-wheeled vehicles (motorcycles).

<Prior Art> Generally, as shown in FIG. 12, a disc brake device for an automobile has a structure in which a sandwich-type brake pad part f is attached to a peripheral part e of a brake disc d, which has a simple disk shape. There is. In this case, it is difficult to achieve the desired braking performance by simply pressing the brake pads against the brake disc surface due to fading, etc.
In automobiles (four-wheeled vehicles, etc.), the braking system is actually a braking system that incorporates an ABS system or an electronic control system, and the safety braking system calculates the balance of each tire and applies a predetermined amount of braking, so it inevitably has a complex configuration. It is becoming.

<Problem to be solved by the invention> However, in the case of disc brake devices for two-wheeled vehicles (motorcycles), it is not possible to incorporate the above-mentioned expensive control device, and the tightening of the front brake bar cannot be controlled manually. This is an old-fashioned braking system in which a person artificially performs a so-called pumping operation several times and applies braking according to road conditions. For this reason, skill is required to operate the brake, and a safe brake mechanism has not yet been achieved. Particularly in the event of an instant emergency situation in which a child or a car suddenly appears, even an experienced person may not be able to withstand the use of such detailed techniques, and this poses a risk.

In view of the above-mentioned circumstances, the present invention aims to provide an automobile disc/brake device which solves the above-mentioned problems by disposing an actuating hill on the brake disc body to automatically perform a pumping operation. be.

<Means for Solving the Problems> The present invention provides at least one pumping actuation hill on the outer periphery of a brake disc body, and connects a hydraulic brake system movable by the actuation hill to the outside of the brake disc body. It faces the working roller of a pumping hydraulic pump.

<Function> Because of the above structure, for example, if you pull (squeeze) the front brake lever to apply the brakes on a motorcycle, the front brake cylinders are actuated by a predetermined hydraulic system, The brake pads are moved and the brake disc is clamped and tightened, and hydraulic pressure is applied to the pumping hydraulic pump from the branched hydraulic system.
Since this operating shaft is extended a little so that the operating roller at the tip comes into contact with the outer peripheral surface of the brake disk, the pumping operating hill that appears every time the brake disk rotates pushes up the operating roller and pushes back the hydraulic pressure of the pumping hydraulic pump, and vice versa. Hydraulic pressure is intermittently transmitted to the brake pad, which is one part of the hydraulic system, and a so-called pumping operation is added to ensure reliable braking.

<Example> The present invention will be described below based on the drawings of the example.

FIGS. 1 to 4 show an embodiment in which one pumping operation hill is provided, and 1 is a disc-shaped brake disc body with an axle 2 in the center, and a predetermined height is provided on the outer periphery 1a of the brake disc body 1. A pumping operation hill 3 having a radius a is formed with a constant circumferential width b, and a centrifugal force balancing gap is provided in the pumping operation hill 3 so that centrifugal force is evenly applied during rotation and does not cause fluctuations in the overall balance. 4 is bored out to form the brake disc 5. In this case, the actuation closing part 3a and the actuation releasing part 3c, which are the front and rear parts in the rotational direction of the pumping actuation hill part 3, have appropriate inclined surfaces, and the central part of the braking crown part 3b has a predetermined arc (the third (see figure). The shapes of the actuation closing part 3a and the actuation releasing part 3c may be a steep actuation making part 3a' and a gradual actuation releasing part 3c' as in the other embodiment shown in FIG. As shown in the figure, the actuation closing part may be a two-stage actuation closing part 3a'' to produce a fine pumping action. Reference numeral 6 indicates internal brake pads 7, 7 which are hydraulically actuated on both outer circumferential sides 5b, 5b of the brake disc 5. A known bifurcated brake pad body is sandwiched between the brake pad body 6, and the operating roller of the support rod 10 at the end of the stroke shaft 9 of the pumping hydraulic pump 8, which contacts the outer periphery 5a of the brake disc 5, is located in the middle of the crotch part of the brake pad body 6. 11 is provided in a protruding manner, and when the pump 8 is not in operation, the restoring spring 9a of the pump 8 positions the actuating roller 11 connected to the support rod 10 above the pumping actuating hill portion 3, thereby preventing the rotation of the brake disc 5. The brake hydraulic system is connected to a hydraulic pump 13 operated by a front brake lever 12, as shown in Fig. 8A and B. The tip of the hydraulic pipe 14 is branched, one hydraulic pipe 14a is connected to the front brake cylinder 15 disposed at the base of the brake pad body 6, and the other hydraulic pipe 14b is connected to the pumping hydraulic pump 8. It is.

Next, to explain this effect, first, when applying the brakes to a running motorcycle, when the front brake lever 12 at the handlebar 16 position is pulled (squeezed), the hydraulic pump 13 is pushed, and this occurs due to this. The hydraulic pressure is transmitted to the front brake cylinder 15 on the brake pad body 6 side through the hydraulic pipe 14, and this operation causes the brake pads 7,
an outer circumferential side surface 5b of the brake disc 5, which is movable across the brake disc 7 and rotates together with the wheel (not shown);
5b is braked by sliding contact. On the other hand, the hydraulic pipe 1
The hydraulic pressure branched from 4 is also applied to the pumping hydraulic pump 8, and the actuating roller 11 protruding from the pumping hydraulic pump 8 is moved to the outer periphery 5 of the brake disc 5.
Place it in contact with a.

That is, as shown in FIG. 6, when the pumping operation hill 3 on the outer periphery 5a of the rotatable brake disk 5 comes to the operating roller 11, the operating roller 11 is moved back by this height a against the hydraulic pressure. The hydraulic pressure is pushed back to the hydraulic pipe 14 via the pumping hydraulic pump 8, and that amount of hydraulic pressure is added to the previous hydraulic pressure, and this pressurized pressure is intermittently applied to one brake pad body 6 to perform the pumping operation. This allows reliable braking to be applied. At this time, the operating roller 11 and the brake disc 5 when the pumping operating hill 3 passes
A pumping release time gap c as shown in FIG. 7 is formed between the outer circumferences 5a of the pumps, and the pump is in a non-pressurized state.

In this case, the number of pumping operation hill portions 3 may be a plurality (4) as in another embodiment shown in FIG.
), and the pumping operation (braking) may be performed multiple times during one rotation.

Furthermore, when using this disc brake device, it is possible to control the vehicle according to the driving conditions. That is, a front brake cylinder 15 and a rear brake cylinder 17 for the rear wheels parallel to this.
A pressure reducing valve 18 serving as an automatic hydraulic pressure control valve is interposed in the middle of the hydraulic pipe (circuit) 14 connecting between the two, and a sensor 19 of a road surface condition confirmation detector is connected to the pressure reducing valve 18 to make the hydraulic operating state variable. (See Figure 10). This is front brake bar 1
The hydraulic pressure from the front brake hydraulic pump 13 activated by the operation in step 2 is applied to the front brake cylinder 15, the pumping hydraulic pump 8, the foot brake hydraulic pump 27, and the rear brake cylinder 17. At this time, the sensor 19, which serves as a road surface condition recognition detector for operating the pressure reducing valve, detects the road surface condition (weather such as rain, pavement condition, etc.), and based on this, the opening degree of the pressure reducing valve 18 is adjusted and the front and rear brakes are activated. Change the degree of control (generally, the degree of control of the brakes is set at a ratio of 7 front: 3 rear).

Furthermore, a specific example is shown in FIG.

In the illustration, the front brake section A is on the right side and the rear brake section B is on the left side. This is the front brake lever 1 installed at the handlebar position 16.
When the hydraulic pump 13 is operated by tightening step 2, the hydraulic pressure is transferred from the hydraulic pipe 14 via the branch point 20 to the front hydraulic pipe 14a and the rear hydraulic pipe 14c, and the hydraulic pressure of the hydraulic pipe 14a is transferred via the branch point 21. It is connected to the front brake cylinder 15 and the pumping hydraulic pump 8 of the hydraulic pipe 14b. In this case, a pumping operation start/stop switch 22 is attached to the base of the pumping hydraulic pump 8, so that the pumping hydraulic pump does not operate during normal disc brake braking that does not require pumping braking. When hydraulic pressure is applied to this front brake cylinder 15, the brake pads 7, 7 of the brake pad body 6 slide and sandwich the front brake disc 5, so that braking is applied and the brake disc 5 is
The pumping operation hill 3 causes the operation roller 11 on the pumping hydraulic pump 8 side to retreat, and the resulting pumping oil pressure is added to the front brake cylinder 15 to pump and brake the brake pads 7, 7.

In this case, a control type pressure reducing valve 18 having a computing unit 24 equipped with a driving condition setting switch 23 is interposed in the middle of the branch hydraulic pipe 14c, and the control type pressure reducing valve 18 is interposed in the middle of the branch hydraulic pipe 14c. The condition is checked by a computing unit 24, which serves as a control circuit, and the hydraulic pressure applied to the front and rear is appropriately controlled.

Further, the hydraulic pressure applied to the hydraulic pipe 14c reaches the rear brake cylinder 17, and the rear brake disc 2 is applied to the brake pads 7', 7'.
5 is clamped and braked.

Further, a hydraulic pump 27 is provided at the tip of a hydraulic pipe 14d that separates from this rear hydraulic pipe 14c via a branch point 26, and a foot brake 28 is attached to the end of the hydraulic pump 27. It extends to the rear brake disc 25. Note that this rear brake disc 25 is not provided with a pumping operation hill.

<Effects of the Invention> As described above, the automobile disk brake device of the present invention has a pumping operation hill formed on the brake disk, and the operation roller of the pumping hydraulic pump that comes into contact with the operation hill and operates, rotates. Each time, hydraulic pressure is added to the brake pad on the brake disc side and applied mechanically to obtain simple pumping brake braking, thereby contributing to safe driving without the need for pumping brake operation that relies on feel as in the past. Furthermore, unlike conventional ABS systems and electronic control systems, it is not an expensive device and can be provided at low cost. Moreover, since it is a mechanical mechanism, it can withstand long-term use without causing failures (including those caused by failures in the electrical system) or damage. Furthermore, this device is compact due to its simple structure, which requires only slight processing on the brake disc, and the combination of simple parts such as a pumping hydraulic pump, making it especially suitable for motorcycles. Incidentally, although the above description has been made regarding two-wheeled vehicles (motorcycles), it goes without saying that the present invention can also be applied to disc brake devices for four-wheeled vehicles (passenger cars, etc.).

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a brake disc showing an embodiment of the present invention, Fig. 2 is a perspective view of the main parts of the brake mechanism, Fig. 3 is a front view of the brake disc, and Fig. 4 A and B are the same pumping mechanism. An explanatory diagram of the operating hill part, FIG. 5 is a front view of another embodiment of the brake disc,
Figures 6 and 7 are explanatory diagrams showing the relationship between the pumping operation hill and the operation roller, Figures 8A and B are schematic diagrams of the brake device, Figure 9 is a pumping brake operation block diagram, and Figure 10 is the same. Another pumping brake operation block diagram, FIG. 11 is a schematic diagram of an embodiment of a disc brake that is actually used, and FIG. 12 is a perspective view of the main part of the brake mechanism. 1...brake disc body, 1a...outer circumference,
3... Pumping operation hill, 5... Brake disc, 6... Brake pad body, 7... Brake pad, 8... Pumping hydraulic pump, 11...
Operating roller, 12...Brake bar, 15...Front brake cylinder.

Claims (1)

[Claims] 1 At least one pumping operation hill is provided on the outer periphery of the brake disc body, and an operation roller of a pumping hydraulic pump connected to a hydraulic brake system that moves on the operation hill is exposed to the outside of the disc body. Characteristic automotive disc brake equipment.