JPH0433471Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a forced cooling device for a vehicle brake system, and uses an electronic cooling element to absorb and cool brake heat generated by friction members, etc. This paper proposes a forced cooling device for brake equipment that is devised to warn of brake fade due to brake heat.

(Prior art) Brake heat generated by the friction members of brake devices used in automobiles, etc., is generated from the friction members and the pushing mechanism that pushes them when the brakes are used frequently, such as when going downhill. The heat dissipated by the brake is less than the heat generated by the braking action, and the accumulated heat tends to cause a so-called fade phenomenon in which the braking force decreases, and there is also the risk of paper lock occurring.

For this reason, in order to quickly radiate brake heat from the friction member and its pushing mechanism to the outside, a technology in which a forced cooling device consisting of a heat absorption part and a heat generation part is installed in the mechanism that pushes the friction member of the brake device. is known from Japanese Patent Application Laid-Open No. 60-69335.

In addition, in order to improve the heat dissipation from the heat generating part to the outside, a technique was disclosed in Japanese Patent Application Laid-Open No. 59-44615 in which a thermoelectric cooling element having a Peltier effect was used to absorb heat and the heat dissipation part was formed into a heat dissipation fin. It is being

(Problems to be Solved by the Invention) However, there has been no cooling device that also has a means for checking the degree of fade, which should be the most careful when operating the brakes.

This invention was proposed in view of these problems in the prior art, and provides a forced cooling device for a brake system that is devised to inform the extent of the fade phenomenon during brake operation to aid in driving operations. .

(Means for Solving the Problems) In order to solve the above problems, this invention is as follows: attaching the heat absorption part 6 of the electronic cooling element 5 to the friction member 11 of the brake device and/or the pushing mechanism P that pushes it; In a forced cooling system for a brake device in which a heat dissipation fin 8 is attached to the heat generating part 7 of the electronic cooling element 5, the electronic cooling element 5 is connected to a fade indicator 20 that detects a change in current and issues a fade alarm. This is a forced cooling device for a brake device.

(Function) The brake heat transmitted to the friction member 11 of the brake device and/or the pushing mechanism P that pushes it due to the brake action is effectively absorbed by the heat absorption part 6 by the Peltier effect of the electronic cooling element 5. The heat is forcibly and effectively radiated by the heat radiating fins 8, and
The absorbed heat is detected as an electric current by the fade indicator 20, and the extent of the fade is alarmed.

(Example) Next, an example of this invention will be described based on the drawings. FIG. 3 is a front view of the main parts of the disc brake device, and the illustrated disc brake device is shown in FIG. The A-line sectional view is
They have the structures shown respectively.

In the disc brake device, a piston 9 is operated by fluid pressure supplied to a cylinder 2 which is a part of a pushing mechanism P provided in a caliper 1, and a disc 10 is operated by a friction member 11 (piston 9) on the side of the cylinder 2. (directly pushed) by the cylinder 2) and the friction member 11 provided opposite the cylinder 2.

In FIG. 3, an electronic cooling element 5 is attached to a back metal 14 to which a friction member 11 is attached, which is provided opposite to the cylinder 2.

That is, the heat absorbing part 6 of the electronic cooling element 5 is attached to the outer part 15 of the back metal 14 which is engaged with the forked part of the claw 17 of the caliper 1.

The heat generating part 7 of this electronic cooling element 5 is connected to the input terminal of a comparator 18 by a wiring l as shown in FIG.
9, and fade indicator 2
The configuration is such that 0 is input.

As a result, the brake heat generated in the friction members 11, 11, etc. is outputted as a current in the heat generating section 7 due to the Peltier effect of the electronic cooling element 5, and is compared with a reference voltage in the comparator 18 to determine the value of the brake heat. is displayed on the fade indicator 20 as the magnitude of the fade phenomenon.

Therefore, the driver can appropriately control the brake operation by the display of the fade indicator 20, and can prevent paper lock from occurring.

Furthermore, the electronic cooling device shown in FIG. 3 has a function not only as a cooling device but also as a temperature sensor that detects the value of brake heat using the fade indicator 20.
The temperature of the brake device can also be controlled by adjusting the current value flowing through the wiring l.

The device shown in FIGS. 1 and 2 is a reference example showing an example of a brake device to which this invention is applied. 8 is provided, and this heat generating part 7
A battery E as a power source is connected by a wiring l, and heat is generated from the battery E so that the heat absorbed in the heat absorption part 6 flows to the heat generation part 7, and the heat absorption part 6 becomes low temperature and the heat generation part 7 becomes high temperature. The configuration is such that a control current is supplied to the section 7.

Thereby, the brake heat of the cylinder 2 flows from the heat absorbing part 6 to the heat generating part 7 due to the Peltier effect of the electronic cooling element 5, so that the cylinder 2 becomes low temperature and the heat radiation fin 8 becomes high temperature.

The running wind can remove a large amount of brake heat from the heat dissipating fins 8, which have become high in temperature, and the brake equipment is efficiently cooled.

It is desirable to install the electronic cooling element 5 at a location where the heat dissipation fins 8 are strongly exposed to the driving wind.In addition to the reference examples shown in FIGS. piston 9
Alternatively, the electronic cooling element 5 may be attached to the inner circumferential portion of the tube.

That is, a convex arc-shaped heat absorbing part is closely attached to this inner peripheral part, and a heat dissipating fin 8 protruding from the heat generating part 7 is attached.
are arranged extending toward the center of the inner circumference,
A slit (not shown) is provided at the tip end of the piston 9 on the opening side, and the running wind can enter the inner circumference of the piston 9 through this slit, thereby causing the running wind to reach the heat dissipation fins 8 in the inner circumference. It is designed so that it can be touched.

Further, although not shown, the electronic cooling element 5 can be attached to the outer peripheral portion 15 of the back metal 14 of the friction member 11.

(Effect of the invention) Since the forced cooling device for the brake device according to this invention is configured as described above, the brake action causes the friction member 11 of the brake device and/or the pushing mechanism P that pushes the same to be The transmitted brake heat is
Due to the Peltier effect of the electronic cooling element 5, the heat absorption part 6
The heat is effectively absorbed, and the brake device is forcibly and effectively cooled by the heat dissipation fins 8.
The absorbed heat is detected as an electric current by the fade indicator 20, and the extent of the fade is alarmed.

Thereby, the driver can appropriately control the brake operation according to the display of the fade indicator 20, and can prevent paper lock from occurring.

In this way, it is not only used as a forced cooling device, but also
The fade indicator 20 can also function as a temperature sensor that detects the value of brake heat.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional side view of the essential parts of a reference example of a brake device to which this invention is applied, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is an embodiment of this invention. FIG. 2 is a front view of main parts of the disc brake device shown in FIG. Explanation of symbols, 5...Electronic cooling element, 6... Heat absorption part, 7... Heat generation part, 8... Heat dissipation fin, 11...
Friction member, 20... Fade indicator, P...
...pushing mechanism.

Claims (1)

[Scope of utility model registration request] In a forced cooling device for a brake device, a heat absorbing part of an electronic cooling element is attached to the friction member of the brake equipment and/or a pushing mechanism that pushes it, and a heat radiation fin is attached to the heat generating part of the electronic cooling element. A forced cooling device for a brake device, characterized in that the electronic cooling element is connected to a fade indicator that detects changes in current and issues a fade alarm.