KR20050006826A - A cooling apparatus of disk break using thermoelectronic module - Google Patents

Abstract

PURPOSE: A cooling device of a disk brake using a thermoelectric module is provided to effectively absorb thermal energy produced from a disk by operating the thermoelectric module mounted to a brake pad according to the temperature of the disk and cooling the heated brake pad. CONSTITUTION: A cooling device of a disk brake using a thermoelectric module(600) includes an inner pad plate(300) and an outer pad plate(400) each having a brake pad; a disk(500) a part of which is inserted between the brake pads with a predetermined gap; and a finger part(130) formed to the other side of a caliper housing(100) to cover the other side of the outer pad plate. The cooling device of a disk brake includes the thermoelectric module installed to the inside of the finger part to be attached to the outer pad plate; a thermoelectric module drive part driving the thermoelectric module; a temperature-sensing part installed to the inside of the caliper housing to sense the temperature of the disk; and a control part controlling the working of the thermoelectric module drive part according to the compared result of a sensed temperature value provided from the temperature-sensing part and a preset reference temperature value. The thermoelectric module receives external electric energy and cools the brake pad heated by a thermoelectric effect.

Description

Cooling device for disc brake using thermoelectric module {A COOLING APPARATUS OF DISK BREAK USING THERMOELECTRONIC MODULE}

The present invention relates to a cooling device for a disc brake using a thermoelectric module, and in particular, by operating a thermoelectric module mounted on a brake pad according to the temperature of the disk during braking of a vehicle, thereby cooling the heated brake pad, thereby generating heat energy generated from the disk. It relates to a cooling device for a disc brake using a thermoelectric module that can be effectively absorbed.

In general, a brake mounted on a vehicle is used to decelerate a vehicle while driving or to maintain a stopped or stopped state, and converts kinetic energy during driving into thermal energy by a mechanical friction device to release its frictional heat into the air to perform a braking action. do. These brakes can be classified into drum brakes and disc brakes according to the structure. The disc brakes are used to obtain a braking force by strongly pressing a disk-shaped disk that rotates together with the wheels from both sides with a pad. Used for axle.

1 is a side cross-sectional view showing a conventional disc brake, a conventional disc brake, a cylinder 11 is formed on one side of the caliper housing 10 constituting the body, the cylinder 11 is moved back and forth by hydraulic pressure The piston 20 is built in. A pair of pad plates 30 and 40 operated by the piston 20 are installed at regular intervals. The pad plates 30 and 40 are divided into an inner pad plate 30 having an inner pad 31 attached thereto and an outer pad plate 40 having an outer pad 41 attached thereto, and having an inner pad plate 30. Is attached to the piston 20 to operate in accordance with the piston 20 operation. A disk-like disk 50 which is partially inserted with a predetermined gap between the inner pad 31 and the outer pad 41 and rotates together with a wheel (not shown) is configured.

In the above-described configuration, the other side of the caliper housing 10 is injection molded so that the finger part 13 is bent from the top to the bottom so as to surround the other side of the outer pad plate 40, and brake of the brake is provided. When the finger part 13 pushes the outer pad plate 40, the outer pad 41 is in close contact with the outer surface of the disk 50.

Reference numeral 21 denotes a seal for restoring the piston 20 when the braking action is released, and 12 denotes an inlet through which the braking hydraulic pressure is transferred into the cylinder 11.

However, in the conventional disc brake configured as described above, a large amount of heat energy is released due to the friction of the disc and the brake pad during braking of the vehicle, resulting in thermal deformation of the disc, thereby reducing the braking force of the brake and causing abnormal vibration of the vehicle (Judder). ) Causes a problem.

The present invention has been made to solve the above problems, an object of the present invention is to generate a disk by cooling the heated brake pad by operating the thermoelectric module mounted on the brake pad according to the temperature of the disk during braking of the vehicle The present invention provides a cooling device for a disc brake using a thermoelectric module that can effectively absorb thermal energy.

In order to achieve the above object, the cooling device for a disc brake using the thermoelectric module of the present invention is installed at regular intervals to the inner side of the caliper housing forming a body, and an inner pad plate and an outer pad each having a brake pad on one surface thereof. In the disc brake cooling apparatus comprising a plate, a disk inserted into a portion with a predetermined gap between the brake pad, and a finger portion formed to surround the other side of the outer pad plate on the other side of the caliper housing, A thermoelectric module installed inside the finger to be attached to an outer pad plate and receiving external electric energy to cool the brake pad heated by a thermoelectric effect; A thermoelectric module driver driving the thermoelectric module; It is installed in the inner position of the caliper housing includes a temperature sensing unit for sensing the temperature of the disk and a control unit for controlling the operation of the thermoelectric module driver by comparing the detected temperature value provided from the temperature sensing unit with a predetermined reference temperature value. Characterized in that made.

In the above-described configuration, it is preferable that a heat insulating member is further included between the inner surface of the finger portion and the thermoelectric module to prevent heat energy generated at the heat generating side of the thermoelectric module from being directly transmitted to the finger portion.

Preferably, the temperature sensing unit is made of a temperature sensor, and is spaced apart by a predetermined interval so as not to contact the disk inside the caliper housing.

1 is a side cross-sectional view showing a conventional disc brake;

Figure 2 is a side cross-sectional view showing a cooling device for a disc brake using a thermoelectric module according to an embodiment of the present invention,

3 is a functional block diagram schematically showing a cooling device for a disc brake using a thermoelectric module according to an embodiment of the present invention.

*** Explanation of symbols on main parts of drawing ***

100: caliper housing, 110: cylinder,

120: inlet, 130: finger portion,

200: piston, 210: seal,

300: inner pad plate, 310: inner pad,

400: outer pad plate, 410: outer pad,

500: disk, 600: thermoelectric module,

610: cooling substrate, 620: heating substrate,

630: N-type and P-type thermoelectric semiconductor,

640: power supply wire for thermoelectric module (+,-),

650: insulation member, 700: thermoelectric module drive unit,

800: temperature detection unit, 900: control unit,

950: power supply

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. This embodiment is not intended to limit the scope of the invention, but is presented by way of example only.

2 is a side cross-sectional view illustrating a cooling apparatus for a disc brake using a thermoelectric module according to an embodiment of the present invention, and FIG. 3 schematically illustrates a cooling apparatus for a disc brake using a thermoelectric module according to an embodiment of the present invention. This is a functional block diagram.

As shown in Figure 2 and 3, the disc brake of the vehicle according to the present invention, as in the configuration of the conventional disc brake, the cylinder 110 is formed on one side of the caliper housing 100 forming a body, the cylinder The piston 110 has a built-in piston 200 to move back and forth by the hydraulic pressure. A pair of pad plates 300 and 400 operated by the piston 200 are installed at a predetermined interval. The pad plates 300 and 400 are divided into an inner pad plate 300 having an inner pad 310 attached thereto and an outer pad plate 400 having an outer pad 410 attached thereto, wherein the inner pad plate 300 is a piston. Attached to (200) is operated in accordance with the operation of the piston (200). A disk-shaped disk 500 which is partially inserted with a predetermined gap between the inner pad 310 and the outer pad 410 and rotates together with a wheel (not shown) is configured.

On the other hand, the other side of the caliper housing 100 is injection molded so that the finger part (130) is bent and extended from the top to the bottom to surround the other side of the outer pad plate 400, the finger portion during braking 130, the outer pad plate 400 pushes the outer pad 410 to the outer surface of the disk 500.

In particular, the disc brake cooling apparatus using the thermoelectric module according to the present invention is installed inside the finger portion 130 so as to be attached to the outer pad plate 400, and provides external electric energy (for example, direct current). A thermoelectric module 600 which cools the outer pad 410 heated by the thermoelectric effect; A thermoelectric module driver 700 for driving the thermoelectric module 600; A temperature sensing unit 800 installed at an inner position of the caliper housing 100 and sensing a temperature of the disk 500; A controller 900 for controlling the operation of the thermoelectric module driver 700 by comparing the detected temperature value provided from the temperature detector 800 with a preset reference temperature value; It is configured to include a power supply unit 950 for supplying the operating power of each part.

In the above-described configuration, the thermoelectric module 600 is typically a form of a module in which N-type and P-type thermoelectric semiconductors are connected in a pi (π) type to be electrically connected in series and thermally parallel. In this case, when a direct current (DC) current flows, a temperature difference occurs on both sides of the module due to the thermoelectric effect, and power generation occurs. That is, the thermoelectric module 600 commonly used as described above refers to a solid state heat pump using a cooling effect exhibited by the Peltier phenomenon. The Peltier phenomenon refers to the occurrence of heat generation or absorption at the connection point when current flows through the connection of two different metals.

The thermoelectric module 600 includes N-type and P-type thermoelectric semiconductors 630 between a pair of insulating substrates made of a ceramic material such as alumina (Al 2 O 3), that is, a cooling substrate 610 and a heating substrate 620. Form it by arranging. The P-type semiconductor and the N-type semiconductor 630 are bonded to a metal electrode (not shown), and the poles of the bipolar branch terminals of the circuit PN pair are connected to the power supply wires (+,-; 640) for thermoelectric modules, respectively. When a direct current flows, holes in the P-type semiconductor are led to the negative electrode and electrons in the N-type semiconductor are led to the opposite electrode according to the Peltier effect. At this time, since both the holes and the electrons have heat from the P-N junction electrode on one side and move to the other bifurcated electrode, the junction on the one side is cooled to absorb heat from the surroundings, and the bifurcation on the other side releases heat. If you reverse the flow of current, the opposite effect occurs.

Accordingly, in the present invention, the cooling substrate 610 of the thermoelectric module 600 to effectively absorb the heat energy generated by the disk 500 due to friction between the disk 500 and the brake pads 300 and 400 during braking of the vehicle. The outer pad plate 400 is mounted.

In addition, the cooling substrate 610 of the thermoelectric module 600 may be installed in direct contact with the outer pad 410.

The temperature sensing unit 800 preferably includes a conventional temperature sensor, and the temperature sensor may be implemented as a thermistor, a thermocouple, a transistor type thermal sensor, or the like.

In addition, the temperature sensing unit 800 is installed near the disk 500 to the inside of the caliper housing 100, and is preferably spaced apart by a predetermined interval so as not to contact the disk 500.

The controller 900 may be provided separately from an electronic control unit (ECU) that is in charge of overall control of the vehicle.

The power supply unit 950 is preferably provided in the vehicle to use a conventional battery power source for operating electrical and electronic components, but is not limited thereto, and may use a separate battery power source.

On the other hand, between the inner surface of the finger portion 140 and the heat generating substrate 620 of the thermoelectric module 600, the heat insulating member to prevent the heat energy generated from the heat generating substrate 620 is directly transmitted to the finger portion 140. Preferably, 650 is installed.

Reference numeral 210 denotes a seal for restoring the piston 200 when the braking action is released, and 120 denotes an inlet through which the braking hydraulic pressure is transferred into the cylinder 110.

Hereinafter, the operation of the disc brake cooling apparatus using the thermoelectric module of the present invention having the above-described configuration will be described in detail.

First, when the driver steps on the brake pedal (not shown) while the vehicle is running, braking hydraulic pressure is generated from the master cylinder (not shown), and this causes the hydraulic line (not shown) and the inlet port 120 to continue. It is delivered to the cylinder 110 through.

Therefore, by advancing the piston 200 by hydraulic pressure, the front end portion of the piston 200 pushes the center of the inner pad plate 300 toward the disk 500 side, and the inner pad 310 attached thereto is instantaneously attached to the disk 500. Is pressed). In addition, since the hydraulic pressure remains in the cylinder 110, the caliper housing 100 itself moves in the opposite direction, whereby the finger part 130 pushes the outer pad plate 400 toward the disk 500. The attached outer pad 410 is pressed onto the disk 500 to brake.

At this time, the thermal energy generated by the disk 500 due to the friction between the disk 500 and the brake pads 310 and 410 is detected by the temperature sensing unit 800, and the sensed temperature sensing signal is provided to the controller 900.

In addition, the control unit 900 calculates a temperature detection signal provided from the temperature sensing unit 800, compares the calculated sensing temperature value with a preset reference temperature value, and provides an operation control signal to the thermoelectric module driving unit 700. The thermoelectric module driver 700 operates the thermoelectric module 600 by supplying a DC current, for example, to drive the thermoelectric module 600.

In the thermoelectric module 600, a temperature difference occurs on both sides of the module due to the thermoelectric effect, and power generation occurs. That is, the cooling substrate 610 is cooled to absorb heat from the outer pad plate 400, and the heat generating substrate 620 emits heat.

Therefore, the apparatus for cooling a disc brake using the thermoelectric module of the present invention senses the temperature of the disc when braking the vehicle, and when the temperature reaches a predetermined temperature or more, operates the thermoelectric module mounted on the brake pad to cool the heated brake pad. By doing so, it is possible to effectively absorb the heat energy generated from the disk.

Although a preferred embodiment of a cooling apparatus for a disc brake using a thermoelectric module according to the present invention has been described above, the present invention is not limited thereto, but the scope of the claims and the detailed description of the invention and the accompanying drawings are various. It is possible to carry out the transformation to this also belongs to the present invention.

For example, although the thermoelectric module 600 is mounted only on the outer pad plate 400 in the present invention, the thermoelectric module 600 may be mounted on the inner pad plate 300 or both pad plates 300 and 400.

In addition, although the hydraulic disc brake is applied in the present invention, the present invention is not limited thereto and may be applied to a motor or an electric disc brake.

According to the cooling device of the disc brake using the thermoelectric module of the present invention as described above, when the brake temperature of the vehicle brakes when the temperature is above the predetermined temperature, by operating the thermoelectric module mounted on the brake pad is heated By cooling the brake pads, there is an advantage that the heat energy generated in the disk can be absorbed effectively.

Claims (3)

An inner pad plate and an outer pad plate provided with a brake pad on one surface of the caliper housing constituting the body, and a disk partially inserted with a predetermined gap between the brake pads, and the caliper housing In the other side of the disk brake cooling device comprising a finger portion formed to surround the other side of the outer pad plate, A thermoelectric module installed inside the finger part to be attached to the outer pad plate and receiving external electric energy to cool the brake pad heated by a thermoelectric effect; A thermoelectric module driver driving the thermoelectric module; A temperature sensing unit installed at an inner position of the caliper housing and sensing a temperature of the disk; And a control unit for controlling the operation of the thermoelectric module driving unit according to a result of comparing the detected temperature value provided from the temperature sensing unit with a preset reference temperature value. According to claim 1, Between the inner surface of the finger portion and the thermoelectric module is characterized in that the heat insulating member is further included to prevent the heat energy generated in the heat generating side of the thermoelectric module is directly transmitted to the finger portion. Cooling apparatus for disc brakes. The apparatus of claim 1 or 2, wherein the temperature sensing unit comprises a temperature sensor and is spaced apart by a predetermined interval so as not to come into contact with the disk inside the caliper housing.