KR20010037070A - brake apparatus for trailer vehicle - Google Patents

Abstract

PURPOSE: A brake system of trailer is provided to prevent a jack-knife phenomenon by different supplying to high compressed air between right and left wheel, when brake is turning. CONSTITUTION: When a trailer vehicle turning to left direction is braking, a left wheel(2a) generates a braking force larger than that of a right wheel(2b) by the supply of much high pressure air to the left wheel(2a) from the controller and the braking pressure controller of a steering perceiving device and a braking force controller respective. Thus, the inertial running direction of a tractor and that of the trailer becomes same, thereby preventing a jack-knife phenomenon that the tractor and the trailer are contacted.

Description

Brake apparatus for trailer vehicle

The present invention relates to a trailer vehicle, and more particularly to a brake device of a trailer vehicle that can ensure the stability of the driving by adjusting the braking force of the trailer vehicle during braking during turning.

In general, the trailer vehicle, as shown in Figure 1, the tractor 1, which serves as a towing vehicle for generating a driving force, and a trailer that is connected to the rear of the tractor 1 to be towed and to load heavy cargo It is composed of (2), such a trailer vehicle is a large commercial vehicle is a situation that is mainly equipped with a pneumatic brake device to increase the efficiency of braking by adding a large braking force to the wheel during braking.

That is, the configuration of the pneumatic brake device is largely divided into a tractor brake device (a) and a trailer brake device (b), as shown in Figure 2, first, the tractor brake device (a) is the atmosphere The compressor 10 to receive the compressed air into the compressed air at high pressure, the storage tank 11 configured to store the compressed air of the high pressure compressed from the compressor 10, and interlocked by pressurization of the brake pedal 12 during braking. And a brake valve 13 which is opened between the brake valve 13 and the left and right wheels 1a and 1b of the front and rear of the tractor 1 to supply high pressure compressed air during braking. The valve 14 and the release valve 15 and the front / rear left and right wheels 1a and 1b are installed on the side and supplied through the quick release valve 14 and the release valve 15. Cam type brake mechanism 16 is operated by receiving compressed air of high pressure, respectively .

In addition, the trailer brake device (b) includes a relay valve (20) installed on a conduit connected to and connected from the brake valve (13) of the tractor brake device (a), and the compressor of the tractor brake device (a) ( Storage tank 21 for receiving the compressed high-pressure compressed air from the storage 10, the left and right wheels of the front and rear of the trailer (2) of the high-pressure compressed air opened during braking and stored in the storage tank 21 ( Release valve 22 to be supplied to 2a, 2b and left / right wheels 2a and 2b at the front and rear of the trailer 2 by receiving the high pressure compressed air supplied from the release valve 22. It consists of a cam type brake mechanism 23 provided so that brake may be carried out.

Here, the cam brake mechanism 16 provided on the left and right wheels 1a and 1b of the front and rear of the tractor brake device a, and the left and right sides of the front and rear of the trailer brake device b. The cam brake mechanism 23 of the wheels 2a and 2b includes the air chambers 16a and 23a, the slack adjusters 16b and 23b and the cams 16c and 23c, respectively.

In addition, among the various pipelines through which the high pressure compressed air is supplied from the tractor brake device (A) and the trailer brake device (B), a control pipeline called a pilot pipeline P is provided. P) extends from the brake valve 13 to the release valves 15 and 22 in the tractor brake device (a) and the trailer brake device (b), respectively.

Further, in the tractor brake device (a) and the trailer brake device (b), respective conduits from the storage tanks 11 and 21 to the release valves 15 and 22 are the storage tanks 11 and 21. It is a supply line (S) for supplying the high-pressure compressed air stored therein directly to the release valve (15, 22).

As such, the reason why the pilot line P and the supply line S are separately provided in the pneumatic brake device is that the high pressure is stored in the storage tanks 11 and 21 and supplied to the cam brake mechanism 16 during braking. Since the length of the conduit through compressed air is long, its purpose is to add fast response and reliable braking force during braking.

Therefore, when the driver steps on the brake pedal 12 during braking, the brake valve 13 is opened to supply high-pressure compressed air to the front / rear left and right wheels 1a, 2a, 1b, and 2b. Braking is performed. First, in the tractor brake device (a), the left / right side of the front via the quick release valve 14 through the brake valve 13 through which the high pressure compressed air stored in the storage tank 11 is opened. Whereas braking is performed by being supplied directly to the wheels 1a and 1b, the left and right wheels 1a and 1b at the rear via the release valve 15 are released through the supply line S. When the release pressure of the release valve 15 is applied through the pilot pipe line P while the compressed air of high pressure is always supplied until just before the), the release valve 15 is opened and the supply pipe S is opened. Store the stored high pressure compressed air in the rear left / right wheels (1a, 1b) within a short time. To provide fast braking performance.

Similarly, the high pressure compressed air in the storage tank 21 is supplied to the brake device for the trailer (b) until just before the release valve 22 through the pilot pipe P. When opening pressure is applied to the release valve 22 through P), the release valve 22 is opened and the high pressure compressed air stored in the supply line S is shortly forward / rear of the trailer 2. By supplying to the left and right wheels (2a, 2b) of the will be a fast braking performance.

Therefore, when the driver steps on the brake pedal 12 during braking, the brake valve 13 is opened, and the high pressure compressed air in the storage tank 11 is first opened by the tractor brake device (a). It is supplied to the front and rear left and right wheels 1a and 1b via the quick release valve 14 and the release valve 15, respectively, and the storage tank 21 also in the trailer brake device (b). The high pressure compressed air in the circumference is supplied to the front / rear left / right wheels 2a and 2b via the release valve 22 that is opened through the conduit.

At this time, in the cam-type brake mechanisms 16 and 23 of the tractor brake device (a) and the trailer brake device (b), high-pressure compressed air flows into the air chambers 16a and 23a to allow the slack adjusters 16b and 23b to operate. ) And the cams 16c and 23c are rotated by the sliding of the slack adjusters 16b and 23b. As a result, the front and rear left and right wheels 1a, 2a, 1b and 2b are rotated. The brake shoe presses the brake drum to brake.

However, in the brake device of the trailer vehicle configured as described above, the brake valve 13 is opened by the pressurization of the brake pedal 12 during braking, and the compressed air of the high pressure is left and right of the front and rear of the tractor 1, respectively. Since the wheels 1a and 1b and the front and rear left and right wheels 2a and 2b of the trailer 2 are supplied in the same amount, the braking force generated in the left and right wheels is almost the same. .

Therefore, when braking for deceleration is performed when turning in the trailer vehicle, the driving direction of the tractor 1 and the inertia driving direction of the trailer 2 are different, so that the tractor 1 and the trailer 2 are separated. The so-called jack-knife phenomenon, which is folded, has a disadvantage.

This jack-knife phenomenon is, as shown in Figure 3, when the tractor 1 is turning while braking in the left direction, the cam brake mechanism of the left and right wheels (2a, 2b) of the trailer (2) At 23, the same air pressure acts and the same amount of braking force is generated. In this case, the inertia driving direction of the trailer 2 acts in a straight direction rather than a turning direction on the left side, so that the tractor 1 This is caused by the tendency to move in the direction of turning to the right (shown by the imaginary line) from the rear of the), which is caused when the trailer (2) moves in the opposite direction of the turning direction of the tractor (1) during braking It is a problem that causes an accident.

Therefore, the present invention has been made in view of the above, by detecting this during braking during turning and supplying high-pressure compressed air corresponding to the turning degree differently to the left and right wheels of the trailer, causing a difference in braking force. It is an object of the present invention to provide a brake of a trailer vehicle that can be made so that jack-knife phenomenon does not occur.

According to the present invention for achieving the object described above, the brake is opened in cooperation with the brake pedal during braking while being supplied with high-pressure compressed air through a supply line according to the driving of the compressor of the brake device for a tractor. A brake of a trailer vehicle in which a control pressure is supplied through a valve and a pilot pipe to brake the high pressure compressed air waiting on the supply pipe to a brake mechanism of a left / right wheel, wherein the pilot pipe path is connected to the brake valve. Branched pilot pipes are connected to the left and right wheels, and on the branched pilot pipes, high pressure compression is supplied to the left and right wheels of the trailer by steering detection means for detecting steering direction or steering degree during braking during steering. A braking force adjusting means for controlling the amount of air is provided so that the wheel on the turning side is reversed. It is characterized in that a greater braking force can be obtained from the side wheel.

In addition, the steering detecting means may be configured to control the size of the driving member interlocked with the steering shaft during steering, the driven member interlocked with the rotation of the drive member, and the amount of power installed on the driven member side and output according to the amount of rotation. Characterized in that it comprises a variable resistor to be made.

And, the braking force control means is installed on the pilot pipe branch branched from the pilot pipe pilot pressure control means consisting of a pair of solenoid valves respectively installed to adjust the degree of opening according to the direction and degree of steering during steering, and the branched Installed at the point where the pilot line and the supply line are connected, the opening and closing amount is controlled by the control pressure supplied through the solenoid valve so that the amount of compressed air supplied to the left and right wheels during braking can be independently controlled. It characterized in that it comprises a braking pressure control means consisting of a valve.

1 is a side view schematically showing a trailer vehicle of a general type,

Figure 2 is a block diagram showing a brake device in a conventional trailer vehicle,

Figure 3 is a schematic diagram for explaining the jack-knife phenomenon occurring when braking during the conventional trailer vehicle turning,

Figure 4 is a block diagram showing a brake device of a trailer vehicle according to the present invention.

<Description of the code | symbol about the principal part of drawing>

Brake System for Go-Tractor Brake System for T-Trailer

1-tractor 2-trailer

21-storage tank 30-steering shaft

31-drive member 32-drive member

33,33'- variable resistance 34- movable contact

35-Reduction member 36-solenoid valve

37-Flow Relief Valve P-Pilot

P1, P2-branched pilot pipeline S-supply pipeline

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

Figure 4 is a block diagram showing a brake device of a trailer vehicle according to the present invention, the same reference numerals as in Fig. 2 showing a brake device of a conventional trailer vehicle while the same reference numerals are omitted while detailed description thereof Shall be.

The brake device of the trailer vehicle according to the present invention is largely composed of a tractor brake device (a) and a trailer brake device (b), the tractor brake device (a) is the same as the conventional configuration, so the configuration for this It will be omitted, the description will be focused on the configuration of the brake device (b) for the trailer and the operation during the turning thereof.

As shown in the drawings, the present invention relates to steering means for sensing the steering direction to the degree of steering during steering, and to the left and right wheels 2a and 2b of the trailer 2 when braking by sensing the steering sensing means. It consists of a braking force control means for controlling the amount of high-pressure compressed air supplied.

Here, the steering detecting means is a drive member 31 that rotates in conjunction with the steering shaft 30, the driven member 32 and the driven member 32 to rotate in accordance with the rotation of the drive member 31, and this driven member 32 It is configured to include a pair of variable resistors (33, 33 ') installed on the side to adjust the size of the power output differently according to the amount of rotation.

To this end, the driven member 32 is connected to the variable resistors 33 and 33 'variably according to the steering direction or the steering degree while receiving power from a battery mounted in the vehicle, thereby controlling the size of the output power differently. The movable contact 34 which rotates integrally with the rotation of the driven member 32 is fixed, and the pair of variable resistors 33 and 33 'are independently disposed around the driven member 32, and the driving member Between the 31 and the driven member 32, the movable contact 34 of the driven member 32 has one variable resistor even when the driving member 31 rotated in association with the steering shaft 30 to several times in one direction. The deceleration member 35 is engaged to selectively connect only with 33, 33 ').

Accordingly, when the steering shaft 30 is rotated to the left, the driven member 32 is rotated equally to the left by the deceleration member 35 engaged with the driving member 31 so as to be connected to the variable resistor 33. The size of the output power is controlled by varying the parts, wherein the greater the degree of turning the steering shaft 30 is, the more proportional the power output of the movable contact 34 outputs through the variable resistor 33 is. It becomes bigger.

And, the braking force adjusting means is largely composed of a pilot pressure control means and a braking pressure control means.

First, the pilot pressure control means is connected so as to branch on the pilot pipe (P) connected from the brake valve 13 of the tractor brake device (a) to the trailer brake device (b), respectively, the left and right sides of the trailer (2) The wheels 2a and 2b are provided to be branched pilot pipes P1 and P2 which are installed to face each other, and the degree of opening of the wheels 2a and 2b is adjusted according to the direction and degree of steering when steered on the branched pilot pipes P1 and P2. It comprises a pair of solenoid valve (36).

Here, the solenoid valves 36 respectively provided on the branched pilot pipe lines P1 and P2 are individually connected to a pair of variable resistors 33 and 33 'of the steering sensing means, so that steering direction to steering during steering is performed. According to the degree, a variable size of power is applied from the movable contact 34, and as a result, the branched pilot pipes P1 and P2 are controlled to open through the solenoid valve 36. The opening degree of the solenoid valve 36 is set to the open state to some extent.

And, the braking pressure control means is installed at the point where the branched pilot pipe (P1, P2) and the supply pipe (S) connected to receive the high-pressure compressed air directly from the storage tank 21 is connected to the solenoid valve 36 The amount of opening and closing is controlled by a control pressure supplied through a), and the pressure adjusting release valve 37 is configured to independently adjust the amount of compressed air supplied to the left and right wheels 2a and 2b during braking.

Therefore, in the trailer vehicle having the trailer brake device (b) configured as described above, the brake valve 13 is opened by the pressurization of the brake pedal 12 when the vehicle brakes, and the control pressure is controlled through the pilot pipe P. This tractor brake device (A) is, of course, is applied to the branched pilot pipelines (P1, P2) of the trailer brake device (B), at which time the steering sensing means to detect the steering direction and the degree of steering Only one of the pair of solenoid valves 36 installed on the pilot pipelines P1 and P2 is applied with a variable size power corresponding to the steering degree to adjust the opening amount of the solenoid valve 36.

That is, when the trailer vehicle brakes while turning in the left direction, the driving member 31 of the steering detecting means rotates to the left by the steering shaft 30, and the rotation amount of the driving member 31 is decelerated. The movable contact 34 fixed on the driven member 32 in the state reduced by the member 35 is rotated in the same direction as the steering shaft 30 while being variable resistance. A large power source connected to (33) and proportional to the degree of turning is applied to the solenoid valve 36 provided on the branched pilot pipe line P1 on the left side, which is a pilot pressure control means, and as a result, the solenoid valve 36 The opening of the branched pilot pipe (P1) is made larger than the initial set degree.

At this time, since no separate power is applied to the solenoid valve 36 mounted on the branched pilot pipe P2 on the opposite side, the opening degree of the branched pilot pipe P2 is the first solenoid valve 36. ) Will continue with the set opening amount.

As such, when a power supply corresponding to the turning degree is applied only to the solenoid valve 36 corresponding to the turning direction among the solenoid valves 36 installed on the branched pilot pipe lines P1 and P2, the pilot pressure is changed. Pressure increases the amount of opening of the flow regulating release valve 37 provided on the left side of the flow regulating release valve 37 of the braking pressure control means, so that the left / right wheels 2a, The amount of high-pressure compressed air supplied to the cam-type brake mechanism 23 of the left wheel 2a in 2b) is large and generates a greater braking force than the right wheel 2b.

Accordingly, when the trailer vehicle turning to the left is braking, the pilot pressure control means and the braking pressure control means of the steering sensing means and the braking force adjusting means are respectively driven to a larger amount of high pressure compressed air to the left wheel 2a. When the left wheel 2a generates a greater braking force than the right wheel 2b, the driving direction of the tractor 1 and the inertia driving direction of the trailer 2 become equal to each other. The so-called jack-knife does not occur when the tractor 1 and the trailer 2 are folded during braking.

In addition, the braking effect during braking while turning in the left direction described above is the same as in the reverse direction when turning to the right, and the jack-knife phenomenon in which the tractor 1 and the trailer 2 are folded also occurs. Of course not.

As described above, according to the brake apparatus of the trailer vehicle according to the present invention, the left and right wheels are supplied by supplying a larger amount of high pressure compressed air to wheels of the trailer in the opposite direction to the wheels of the trailer in the direction of turning during braking. By varying the amount of braking force generated in the vehicle, it is possible to prevent the occurrence of an accident caused by jack-knife phenomenon between the tractor and the trailer during braking during turning.

Claims (5)

A brake valve which is supplied with high-pressure compressed air through a supply line S according to the operation of the compressor 10 of the tractor brake device (a) and is in a standby state, and opens in cooperation with the brake pedal 12 during braking. (13) and the pilot vehicle (P) is supplied with a control pressure to supply a high-pressure compressed air waiting to be supplied on the supply line (S) to the brake mechanism of the left and right wheels (2a, 2b) trailer vehicle is braking In the brake device of, The pilot pipelines P1 connected to the brake valve 13 are connected to branched pilot pipelines P1 and P2 that extend to the left and right wheels 2a and 2b, and are steered on the branched pilot pipelines P1 and P2. Braking force adjusting means is provided for controlling the amount of high-pressure compressed air supplied to the left and right wheels 2a and 2b of the trailer 2 by the steering sensing means for sensing the steering direction to the steering degree during braking. The brake device of a trailer vehicle, characterized in that the wheel of the vehicle can obtain a greater braking force from the wheel on the opposite side of the turning. The method according to claim 1, wherein the steering detecting means comprises a driving member (31) interlocked with the steering shaft (30) during steering, a driven member (32) interlocked with the rotation of the driving member (31), and the driven member ( 32) the brake device of the trailer vehicle, characterized in that it comprises a variable resistor (33, 33 ') is configured to differently adjust the size of the output power in accordance with the amount of rotation. 3. The driven member (32) according to claim 2, wherein the driven member (32) is variably connected to the variable resistors (33, 33 ') corresponding to the steering direction and the degree of steering and fixed on the follower member (32) to output different sizes of power. And a movable contact 34 which rotates integrally with each other, the variable resistors 33 and 33 'are independently disposed at the outer circumference of the driven member 32, respectively, and the drive member 31 and the driven member 32 are separated. Between the brake member of the trailer vehicle, characterized in that the reduction member 35 is installed. The pair of solenoids of claim 1, wherein the braking force adjusting means is installed on the pilot pipe lines P1 and P2 branched from the pilot pipe line P to adjust the degree of opening depending on the steering direction and the degree of steering. The pilot pressure control means consisting of the valve 36, the branched pilot pipe (P1, P2) and the supply line (S) is connected to the point where the opening and closing amount by the control pressure supplied through the solenoid valve 36 Trailer, characterized in that it comprises a braking pressure control means consisting of a flow rate adjustment valve 37 to adjust the amount of compressed air supplied to the left and right wheels (2a, 2b) during braking independently. Brake system of the vehicle. 5. The trailer vehicle according to claim 4, wherein the solenoid valves 36 respectively provided on the branched pilot pipelines P1 and P2 are individually connected to the variable resistors 33 and 33 'of the steering sensing means, respectively. Brake system.