KR930008412Y1 - Brake cooling device - Google Patents

Abstract

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Description

Automobile brake chiller

1 is a view showing the configuration of a vehicle brake cooling apparatus according to the present invention.

2 is a side cross-sectional view of a quick release valve according to the present invention.

* Explanation of symbols for main parts of the drawings

2: pneumatic tank 3: dual brake

6: brake drum 7: quick release valve

8: first tube 9: brake chamber

10 piston 13 slack adjuster

16: pipeline 18: first port

19: second port 21: movable side

23: third port 24: fourth port

The present invention relates to a vehicle brake cooling apparatus, and more particularly, to a brake cooling apparatus that can prevent the brake drum from overheating by the braking heat of the brake generated during braking.

The braking device is a safety device installed to slow down or stop a driving car and maintain a parking state.

Since the braking device is configured to press the rotating body with the friction member of the fixed body to reduce or completely stop the rotation speed of the rotating body, braking heat is generated between the rotating body and the friction member during braking.

In this brake system, the rotating body becomes a brake drum and the brake lining becomes a friction member. The lining is attached to the brake shoe to brake by a wheel cylinder in the case of hydraulic type, and compressed air is supplied to the brake chamber in case of pneumatic type. By rotating the slack adjuster by pushing the piston, the cam issue is brought into close contact with the drum.

However, such a braking device, since the compressed air used for braking after the braking is to be released to the atmosphere, it is impossible to prevent the braking system from overheating by the heat generated by the friction of the drum and lining during braking.

On the other hand, as proposed in Japanese Utility Model No. 57-122460, a method of detecting this braking during braking and spraying compressed air between the rotating body and the friction member is known.

By the way, this method can not only be used in the hydraulic braking device, because the hydraulic can not discharge the hydraulic pressure used for braking to the atmosphere because it must use a separate compressed air generating means.

And this type of cooling device does not obtain satisfactory cooling effect because compressed air is injected during braking, that is, air is supplied in contact with the drum and lining.

The present invention has been made to solve the above problems, the object of the present invention is to supply into the brake drum immediately after the braking is completed, that is, from the moment the lining falls from the drum, without releasing the compressed air used for braking to the atmosphere It is to provide an automobile brake cooling device for cooling the brake system.

In order to realize this, the present invention provides a pneumatic tank for storing compressed air generated by the compressed air generating means, a dual brake for sending the compressed air in the pneumatic tank to the brake system for braking, and a plurality of tubes in the dual brake. A brake device comprising a brake chamber connected to the brake drum and rotating the slack adjuster to closely contact the lining with the brake drum, the brake device comprising: a first port through which the compressed air flows between the dual brake and the brake drum; It is supported by an elastic member inside the housing having a second port formed coaxially with the port, and third and fourth ports orthogonal to these first and second ports, so as to selectively open and close these ports. A quick release valve with a movable valve installed therein, and the second port Is communicated by the channel, and provides a brake release during the third, fourth car brake cooling with compressed air in the port is fed back to the second port to be capable of supplying compressed air into the drum brake device.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is an embodiment of a compressed air braking device according to the present invention, a pneumatic tank (2) for storing the compressed air generated by the compressor (1), and the compressed air in the pneumatic tank (2) to each wheel The dual brake 3 which the driver operated to send is shown.

The pneumatic tank 2 and the dual brake 3 are connected to the first and second conduits 4 and 5, which are intended to be sent to the front and rear wheels, which are connected to one brake drum 6 in the drawing. Only relationships are shown.

The dual brake 3 is connected to the quick release valve 7, and the quick release valve 7 is connected to the brake drum 6 side through the first tube 8.

The first tube 8 is provided with a brake chamber 9 so that the compressed air supplied through the quick release valve 7 can be delivered to this place. In this chamber 9, a piston ( When the 10) is supported by the elastic member 11 and the supply of compressed air is cut off, the piston 10 is to be retracted.

In addition, a slack adjuster 13 is installed at the tip of the rod 12 of the piston 10 to rotate the cam (not shown) installed in the brake drum 6 so that the brake shoe 14 can be extended into the drum. It is supposed to be.

Since the cam is in close contact with the brake shoe 14 toward the drum side, a detailed description thereof will be omitted.

The brake shoes 14 are pulled to each other by the elastic member 15, which is to allow the brake shoes 14 to be separated from the drum when the brake is released.

The quick release valve 7 is connected to the brake drum 6 side via a conduit 16, which is intimately connected to the brake plate 17.

FIG. 2 is an enlarged side cross-sectional view of the quick release valve 7, which is connected to the dual brake 3 to receive the compressed air of the pneumatic tank 2, and the first port 18. It is provided with the 2nd port 19 drilled on the opposite side coaxially and connected to the said pipe line 16. As shown in FIG.

The movable edge 21 is supported by the elastic member 22 inside the housing 20 between the first and second ports 18 and 19, and the first and second ports 18 and 19 are not braking. It is supposed to block.

In the housing 20, third and fourth ports 23 and 24 are bored in a direction orthogonal to the first and second ports 18 and 19, and the third port 23 is implemented according to the present embodiment. In this example it is in communication with the first tube 8.

When the first, second, third, and fourth ports 18, 19, 23, and 24 cross each other, a relatively wide space 25 is formed, and the movable side 21 moves to the second port 19 side. The third port 23 and the fourth port 24 can communicate with each other.

In the figure, reference numeral 26 denotes a lining attached to a brake shoe, and 27 denotes a second tube connected to a braking system of another wheel.

In the brake cooling apparatus of the present invention, the dual brake 3 operates when the driver presses the brake pedal so that the air in the pneumatic tank 2 communicates with the quick release valve 7. Compressed air flows.

At this time, the compressed air flows into the first port 18 of the housing 20 in FIG. 2, and the movable member 21 moves to the second port 19 while the elastic member 22 is compressed by this pressure. This second port will be blocked.

By this action, the first port 18 is in a state of communicating with the third and fourth ports 23 and 24, so that the compressed air flows to the braking system of the corresponding wheels, respectively. In the example, the flow to the first tube 8 side will be described. Compressed air flowing into the first port (8) is supplied into the brake chamber (9) through the first tube (8), while pushing the piston (11) to rotate the slack adjuster (13) lining in the usual manner ( 26) is pressed against the inner surface of the drum to perform braking.

At this time, when the braking is stopped, the air flow from the pneumatic tank 2 is blocked in the dual brake 3, and thus, the movable edge 21 installed in the housing 20 may be formed by the elastic force of the elastic member 22. Going into position will block the first port 18.

At this time, the compressed air flows into the first tube 8 and the second tube 27, and the compressed air is also filled in the brake chamber 9 communicating with these tubes. Since the supply is stopped by the port 18 being blocked, the third and fourth ports 23 and 24 of the housing 20 are moved by the piston 10 which is retracted by the restoring force of the elastic member 11 in the brake chamber 9. Will flow back.

However, since these third and fourth ports 23 and 24 are already blocked from the first port 18 and in communication with the second port 19, the compressed air flowing back to these ports is the second port. Via 19 it is fed into the brake drum 6 along the conduit 16.

In this case, since the braking is not performed, the lining 26 is separated from the brake drum 6, thereby cooling the frictional heat while the compressed air flows therebetween.

As described above, the brake cooling device according to the present invention uses the compressed air used for braking as a gas to cool the brake when releasing the brake, so that the existing braking system can be used as it is, and there is no need to install the cooling means separately. Therefore, the structure can be simplified, and the cooling efficiency is increased because the drum and the lining are separated from each other.

Claims (1)

A pneumatic tank (2) for storing compressed air generated by the compressed air generating means, a dual brake (3) for braking by sending compressed air in the pneumatic tank (2) to the brake system, and the dual brake (3). In the brake device is connected to a plurality of tubes in the brake device comprising a brake chamber (9) for pushing the slack adjuster (13) in close contact with the lining 26 to the brake drum (6), the dual brake ( Between the 3) and the brake drum 6, a first port 18 into which compressed air flows, a second port 19 formed coaxially with the port 18, and these first and second ports ( 18. A movable valve capable of being selectively opened and closed by an elastic member 22 inwardly of a housing 20 having third and fourth ports 23 and 24 positioned orthogonal to 18 and 19. The quick release valve 7 provided with the 21 is provided, and the above-mentioned second fabric (19) is communicated by the conduit (16) into the brake drum (6), the brake drum (6) as the compressed air of the third, fourth port (23, 24) returns to the second port (19) when braking is released Automotive brake chiller to supply compressed air into the car.