KR101013977B1 - Height control system for vehicles - Google Patents

Abstract

The present invention connects the air spring and the pneumatic tank through the leveling valve and the three-way valve disposed in a separate path, respectively, and connects the muscle cylinder and the pneumatic tank forming the clamp assembly of the leveling valve through the two-way valve, The three-way valve is electrically connected to the niling terminal and the rising terminal of the operation switch, respectively, the two-way valve is electrically connected to the niling terminal and the rising terminal in common, and the operation switch is a timer By providing the vehicle's height control device connected to the battery through the opening, the niling garage and the rising garage while maintaining the function of keeping the garage constant by supplying or discharging the compressed air to the air spring based on the usual design garage. Air spring can be controlled based on the It is.

 Leveling valve. clamp. Muscle cylinder

Description

Garage control device for cars {HEIGHT CONTROL SYSTEM FOR VEHICLES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle height control apparatus, and more particularly, to reduce the recovery time after the niling in a mechanical kneeling system, and to add a rising function to effectively lift the vehicle as needed. It relates to a car's height adjustment device.

In general, the air suspension applied to a car such as a bus uses the elasticity of compressed air to support the weight of the vehicle, absorb vibrations and shocks from the road surface, and attenuate irregular vibrations transmitted from the wheels to ensure safe driving. Be sure to

In such an air suspension, a leveling valve is applied to adjust the air pressure in the air spring according to the weight of the vehicle to keep the garage constant.In the case of a bus, the height of the step is reduced by lowering the garage as needed. By lowering as much as possible, the Kneeling System is applied to allow the elderly and children to ride safely.

As described above, the niling system includes a low-cost mechanical type by a combination of magnetic valves and an electronic control type that receives the height of a vehicle posture electronically using a technology of an electronic control suspension system and controls the electronic control unit.

However, although the mechanical niling system has the advantage of being inexpensive, it takes a long time to restore after the niling, and has a problem of very low commerciality because there is no rising function.

In addition, the electronically controlled type can control all vehicle attitudes of the vehicle, and the adjustment time is very short. However, expensive parts such as height sensors, integrated valve blocks, and electronic control units are used, and the price is very high. It is implicated.

Therefore, the present inventors have studied the mechanical niling system to which the present invention relates, and thus, the present invention has been proposed, and an object of the present invention is to supply or discharge compressed air to an air spring on the basis of a usual design garage to maintain a garage. It is to provide a vehicle height adjustment device that can maintain the posture of the vehicle by controlling the air spring based on the niling garage and the rising garage while maintaining the function to keep it.

In order to realize the above object, the present invention is a muscle that connects the air spring and the pneumatic tank through a leveling valve and a three-way valve disposed in a separate path, respectively, and forms a clamp assembly of the leveling valve through a two-way valve. A cylinder and a pneumatic tank are connected to each other, and the 3-way valve is electrically connected to the niling terminal and the rising terminal of the operation switch, respectively, and the 2-way valve has a common electrical connection to the niling terminal and the rising terminal. The manipulation switch provides a vehicle height adjustment device connected to a battery through a timer.

The three-way valve and the two-way valve is composed of a magnetic valve, the three-way valve is connected to the coiling terminal and discharges the high pressure air supplied to the air spring, and connected to the rising terminal, the high-pressure air of the pneumatic tank It can be supplied by the air spring.

The rotating shaft and the horizontal lever of the leveling valve is characterized in that it is coupled via the clamp assembly to control the garage on the basis of the design garage and control the garage on the basis of the niling garage and the rising garage.

The clamp assembly is composed of a combination of the two semi-cylindrical member is arranged between the rotating shaft of the leveling valve and the fixing hole of the horizontal lever to selectively connect the horizontal lever and the rotary shaft of the leveling valve while being contracted and enlarged in the radial direction. And a pair of clamps and a muscle cylinder that contracts and expands the clamp in a radial direction while being stretched by high pressure air supplied from a two-way valve, and is supported by a washer and a fixing nut fastened to the free end of the rotating shaft. It is characterized by.

In the clamp, a fixing protrusion is formed on each of the outer circumferential surfaces thereof, and the upper end is fixed to the rotating shaft flange of the leveling valve in a state in which the upper end is coupled without mutual interference by the fixing pins. Concave-convex portion that can be inserted and fixed is formed, characterized in that the muscle cylinder is disposed between the lower end of the clamp.

The washer for supporting the clamp from the outside is formed in a shape in which the protrusions are formed on both sides of the lower portion, the outer portion between the protrusions are cut, the distance between the two protrusions is formed larger than the radial rotation range of the clamp It features.

As described above, the present invention is a simple configuration, the air based on the niling garage and the rising garage while maintaining the function of maintaining a constant garage by supplying or discharging compressed air to the air spring on the basis of the usual design garage By controlling the spring it is possible to maintain a constant posture of the vehicle.

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

1 is a system diagram of a height adjusting device according to the present invention, 2 and 4 designate an air spring.

The air springs 2 and 4 are connected to the pneumatic tank 8 via a common leveling valve 6 and at the same time to the pneumatic tank 8 via a three-way valve 10.

And a muscle cylinder (Muscle Cylinder: 12) for controlling the leveling valve (6) is connected to the pneumatic tank (8) through a two-way valve 14, the three-way valve 10 and the two-way valve (14) ) Is electrically connected to the battery 20 via an actuation switch 16 and a timer 18.

The three-way valve 10 and the two-way valve 14 is a magnetic valve, the three-way valve 10 is connected to the operation switch 16 through the two terminals to supply power to the niling terminal 22 Discharges air that has been supplied to the air springs (2) and (4), and supplies power to the air springs (2) and (4) when the power is supplied to the rising terminal (24). If power is not supplied to both terminals, it will be kept closed.

In addition, the two-way valve 14 is commonly connected to the niling and rising terminals 22 and 24 so that pneumatic pressure is transferred to the muscle cylinder 12 through the two-way valve 14 during operation of the operation switch 16. Connected to be supplied.

The muscle cylinder 12 is a cylinder (muscle cylinder MAS model produced by Festo, Korea) that contracts when compressed air is supplied, unlike a normal pneumatic cylinder that is expanded when compressed air is supplied.

The leveling valve 6 controlled by the muscle cylinder 12 supplies the compressed air to or discharges the air springs 2 and 4 based on the design height from the usual design to keep the garage constant. In the present invention, it is possible to control the pneumatic pressure of the air spring (2) (4) in addition to the design garage in addition to the kneeling height (Kneeling Height) and the rising height (Raising Height). .

To this end, in the present invention, the leveling valve 6 is configured as shown in FIGS. 2 and 3.

Looking specifically, in connecting the rotating shaft 30 and the horizontal lever 32 of the leveling valve 6, it was connected via the clamp assembly 34.

The clamp assembly 34 includes clamps 36 and 38 formed of a combination of two semi-cylindrical members, a fixing pin 40 and a muscle cylinder 12, and a free end of the rotation shaft 30. It is supported by the washer 42 and the fixing nut 44 is fastened to.

The pair of clamps 36 and 38 are semi-cylindrical members, and fixing protrusions 46 and 48 are formed on the outer circumferential surface thereof so that the upper ends thereof are rotatably fixed to each other by the fixing pin 40. It is fixed to the flange 42 of the rotating shaft 30.

The clamps 36 and 38 are inserted into the fixing holes 44 of the horizontal lever 32, and the clamps 36 and 38 are fixed to the left and right inner surfaces of the fixing holes 44. The protrusions 46 and 48 are inserted to form the uneven parts 46 and 48 to be fixed.

In addition, a muscle cylinder 12 is disposed between the lower ends of the clamps 36 and 38 so that when the muscle cylinder 12 is contracted, the lower end of the clamps 36 and 38 is reduced while the fixing protrusions 46 ( 48 is freed from the uneven parts 50 and 52 and freed regardless of the rotation axis 30 of the horizontal lever 32.

When the muscle cylinder 12 is extended, the lower ends of the clamps 36 and 38 are enlarged, and the fixing protrusions 46 and 48 are coupled with the uneven parts 50 and 52, and the horizontal lever 32 The rotating shaft 30 is integrated.

Then, as the rotating shaft 30 rotates according to the degree of rotation of the horizontal lever 32, air is supplied or discharged to the air springs 2 and 4.

In addition, the washers 42 supporting the clamps 36 and 38 from the outside are formed with protrusions 54 and 56 on both sides of the lower portion, and the outer portions between the protrusions 50 and 52 are cut. Is done.

In the above, the distance of the protrusions 54 and 56 is larger than the radial rotation range of the clamps 36 and 38, which is when the lower portion of the clamps 36 and 38 is contracted and enlarged in the radial direction. This is to prevent interference from occurring.

In FIG. 2, reference numeral 58 denotes an air inlet port through which air is introduced and connected to the pneumatic tank 8, and 60 denotes air supplying air introduced through the rigid air inlet port 58 to the air springs 2 and 4. It is an outlet.

Referring to the operation of the present invention configured as described above are as follows.

First, in the design garage as shown in Fig. 4A and Fig. 5A, the horizontal lever 32 moves within the ± α range according to the bump and rebound state within the operating range (± α) of the horizontal lever 32 in the design garage. The air passage of the leveling valve 6 is changed to supply or discharge air into the air springs 2 and 4 to maintain a constant posture of the vehicle at all times.

When the driver connects the operation switch 16 to the coiling terminal 24 in order to perform the drilling in the above state, the compressed air supplied to the air springs 2 and 4 is discharged by the operation of the 3-way valve 10. At the same time, as shown in B of FIG. 5, while the two-way valve 14 is controlled to be opened, compressed air is supplied to the muscle cylinder 12 to contract in the longitudinal direction.

Then, the clamps 36 and 38 are contracted radially with respect to the fixing pin 40 so that the fixing protrusions 46 and 48 formed on the clamps 36 and 38 are uneven from the uneven portions 50 and 52. Even if the leveling valve 6 descends, the horizontal lever 32 is not affected, and the rotation angle of the rotation shaft 30 becomes "0".

In the above state, when the lowering of the leveling valve 6 is completed as shown in FIG. 5C by the lowering of the vehicle body, the power supplied to the three-way valve 10 and the two-way valve 14 is cut off from the timer 16. Done.

Accordingly, the air discharge of the air springs 2 and 4 is stopped at the three-way valve 10, and the compressed air supplied to the muscle cylinder 12 is discharged at the two-way valve 14.

Then, as shown in FIG. 5D, while the length of the muscle cylinder 12 is increased, the clamps 36 and 38 are extended with respect to the fixing pin 40 so that the fixing protrusions 46 and 48 are uneven parts 50. (52).

When the fixing protrusions 46 and 48 and the uneven parts 50 and 52 are coupled as described above, the horizontal lever 32 and the rotation shaft 30 are integral with each other and the vehicle body is lowered (Niling state; H1). The vehicle attitude is kept constant within the bumping and rebound range (± β).

In order to restore the design to the garage state in the above-mentioned niling state, the operation switch 16 is connected to the lasing terminal 22.

Then, the vehicle body rises in the reverse order to the above operation, and maintains the design garage while maintaining a constant attitude of the vehicle within the bumping and rebound range (± α).

6A and 7A, the horizontal lever 32 moves while moving within the ± α range according to the bumping and rebound state within the operating range (± α) of the horizontal lever 32 in the design garage as shown in FIG. When the driver wants to raise the garage in order to operate a road such as a mountainous terrain, the driver connects the operation switch 16 with the rising terminal 22.

Then, the compressed air is discharged to the air springs (2) and (4) by the operation of the three-way valve (10) and the compressed air to the muscle cylinder (12) while the two-way valve (14) is controlled to open as shown in B of FIG. Is supplied to the contraction in the longitudinal direction.

Then, the clamps 36 and 38 are contracted in the radial direction with respect to the fixing pin 40 so that the fixing protrusions 46 and 48 formed in the clamps 36 and 38 are separated from the uneven parts 50 and 52. The horizontal lever 32 is not affected even when the leveling valve 6 is raised due to the rise of the vehicle body, and the rotation angle of the rotation shaft 30 becomes "0".

In the above state, when the leveling valve 6 is completed as shown in FIG. 7C due to the rise of the vehicle body, the power supplied to the three-way valve 10 and the two-way valve 14 from the timer 16 is cut off. Done.

Accordingly, the three-way valve 10 stops the supply of compressed air to the air springs 2 and 4, and the two-way valve 14 discharges the compressed air supplied to the muscle cylinder 12.

Then, as shown in FIG. 7D, while the length of the muscle cylinder 12 is increased, the clamps 36 and 38 are extended with respect to the fixing pin 40 so that the fixing protrusions 46 and 48 are uneven parts 50. (52).

As described above, when the fixing protrusions 46 and 48 and the uneven parts 50 and 52 are coupled to each other, the horizontal lever 32 and the rotation shaft 30 are integral with each other and the vehicle body is raised (raising state; H2). In the bumping and rebound range (± γ) to maintain a constant attitude of the vehicle.

And when you want to restore to the design garage state in the above-mentioned state, the operation switch 16 is connected to the coiling terminal 24.

Then, the vehicle body is lowered in the reverse order to the above operation to maintain the design garage while maintaining a constant attitude of the vehicle within the bump and rebound range (± α).

As described above, according to the present invention, with a niling garage while maintaining a function of maintaining a constant garage by supplying or discharging compressed air to the air springs 2 and 4 based on a design height. By controlling the air spring (2) (4) on the basis of the rising garage it is possible to maintain a constant posture of the vehicle.

Reference numeral 62 in FIGS. 4 and 6 is a vertical lever connected to the wheel side.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and those of ordinary skill in the art can easily invent and equalize the same from the embodiments of the present invention. It includes all changes in the ranges that become.

1 is a system diagram of a tuning adjustment device according to the present invention.

Figure 2 is a perspective view of a leveling valve applied to the present invention.

Figure 3 is an exploded perspective view of the clamp assembly applied to the present invention.

4 is a view schematically showing a change in the leveling valve and the horizontal lever during the niling operation of the height adjustment device according to the present invention.

5 is a view sequentially showing the operation of the clamp assembly during the niling operation of the height adjustment device according to the present invention.

Figure 6 is a schematic view showing the change of the leveling valve and the horizontal lever during the raising operation of the height adjustment apparatus according to the present invention.

7 is a view sequentially showing the operation of the clamp assembly during the laminating operation of the height adjustment apparatus according to the present invention.

Claims (6)

The air spring and the pneumatic tank are connected to each other through a leveling valve and a three-way valve disposed in separate paths, and the muscle cylinder and the pneumatic tank forming the clamp assembly of the leveling valve are connected to each other through a two-way valve. The 3-way valve discharges the high pressure air supplied to the air spring when connected to the niling terminal, and when connected with the rising terminal, it supplies the high pressure air of the pneumatic tank to the air spring, respectively. Electrical connections are made, The 2-way valve is electrically connected to the nickel terminal and the rising terminal in common, The control switch is a vehicle height adjustment device, characterized in that connected to the battery via a timer. delete  The method of claim 1, The rotating shaft and the horizontal lever of the leveling valve A garage control device for a vehicle, characterized in that it is coupled via a clamp assembly to control a garage based on a design garage and to control a garage based on a niling garage and a rising garage.  The method of claim 1, The clamp assembly A pair of clamps disposed between the rotating shaft of the leveling valve and the fixing hole of the horizontal lever to selectively connect the horizontal lever and the rotary shaft of the leveling valve while being contracted and enlarged in a radial direction by combining two semi-cylindrical members; It includes a muscle cylinder that is expanded and contracted by the high pressure air supplied from the two-way valve radially contracting and expanding the clamp, And a washer and a fixing nut fastened to the free end of the rotating shaft.  The method of claim 4, wherein The clamp is Fixing protrusions are formed on each of the outer circumferential surfaces thereof, and the upper end is fixed to the rotating shaft flange of the leveling valve in a state where the upper end is coupled without mutual interference by the fixing pins. The uneven part is formed, the height adjustment device of the vehicle, characterized in that the muscle cylinder is disposed between the lower end of the clamp.  The method of claim 4, wherein The washer that supports the clamp from the outside Protrusions are formed on both sides of the lower portion, the outer portion between the protrusions is formed in a shape, the distance between the two protrusions of the vehicle, characterized in that the greater than the radial rotation range of the clamp.

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