JPS59223508A - Kneeling device for air suspension vehicle - Google Patents

Abstract

PURPOSE:To eliminate consumption of air upon kneeling, by providing a drive means for driving a diaphragm to change volumes of right and left separate chambers. CONSTITUTION:When a vehicle reaches a stop, a kneeling switch 36 is closed to excite a solenoid valve 34 and thereby to close cut valves 22 and 22'. Simultaneously, air is supplied to an air cylinder 30 to extend a piston rod 30a in the air cylinder 30 against a spring and thereby to change a position of a diaphragm 24 from a solid line to a dotted line. As a result, the air in bellows 20 on a passenger door 13 side is discharged, while air is supplied to another bellows 20'. Accordingly, a vehicular body is lowered on the passenger door 13 side, while it is raised on the opposite side, thus permitting the vehicular body to be inclined as shown by a dotted line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the present invention. This invention relates to a kneeling device in an air suspension having left and right hollows to which air at a predetermined pressure is supplied between a small wheel such as a pass and a frame.

During air suspension, the air tank and the left side.

A leveling knob/help is provided between the vehicle and the bellows, and this leveling knob opens when the lever becomes lower than a predetermined level (16) to maintain a predetermined vehicle height. - When passengers with a pass get on and off, it is convenient to get on and off when the J is low, and for this reason, at least 1
'' is required to be lowered than the vehicle 1-i+ on the side where the wart occurs. In order to lower the vehicle height, it is preferable to perform kneeling by removing air from the bellows, but in this case, removing air from the bellows increases air consumption by 1d, which is undesirable.

The object of the invention is to provide an air suspension vehicle two-link system which eliminates air consumption during kneeling.

Embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a knee link position 1 according to the present invention.
Air suspension vehicle equipped with JIO 12 wo 4<
L, the air suspension vehicle 12 is leveled from an air tank (not shown) as shown in FIG.
The left and right front and rear bellows 7.20 for the air suspension are connected to the surge tank 18 having a surge tank 18 with one bellow 7.20.
It is equipped with 20゛.

As shown in FIG. Left and right divided chambers 16 of tank 18
．． 16'', a drive means 26 for driving this tire flat 24, a kneeling 1 cut/help 22, 22' and a drive 3 means 2.
6, and a kneeling control means 28 for controlling the same.

The drive means 26 consists of an air syringe 30, the piston rod 30a of which is connected to the diaphragm 24. The spring 32 biases the piston rod 30a downward in FIG. When air is supplied to the piston 70, the end 30a of the piston 70 is driven in the L direction against the spring 32, increasing the volume of the divided chamber 16 on the side having the boarding/exiting CJ 13 (see Fig. 1), and increasing the volume of the divided chamber 16 on the other side. volume to 46
Set it to the second position where it is smaller.

The kneeling 11 control means 28 consists of a solenoid valve 34 and a kneeling switch 36 that excites the solenoid 5i'34. This knee ring inner 36 is connected in series to a voltage source 38 and a coil 34a of the solenoid valve 34. Therefore, when the knees 1°] and 36 are closed, the electromagnetic blade 34 is cut from an air tank (not shown) to supply air to the roofs 22, 22' and the air ring 30. .

To explain the operation of the kneeling device of the present invention, the knee link switch 36 is open during normal running IPj of the air suspension system 7 and 12, and the knee link switch 36 is open and the magnetic valve 34 is closed and the cant pulp is closed. 22°22' is open, while the air cylinder 30 retracts the piston rod 34a by the spring 32 to 1'. For this reason, the bellows 20
．． 90' is maintained at the predetermined 111 high price set by \S/Dah+1/F14. Arrive in the city or at the stop! + [, when the kneeling inch 36 is closed, the solenoid valve 34 is energized as already mentioned.

When the cant valve 2'2.22' is closed, air is supplied to the air cylinder 30, and the piston rod 30a of the air cylinder 30 expands against the splash, causing the diaphragm 24 to move as shown by the solid line in FIG. 2nd digit 7 indicated by dotted line from 1's position
(Switch to

Therefore, when air is removed from the bellows 20 on the side facing the first entrance/exit 13, the air is released into the bellows 20' on the other side. For this reason, the vehicle body tilts as shown by the dotted line, as shown in the figure.

It should be noted that in the embodiment described above, it is clear that only one cant valve 22, 22 is required if it is provided immediately after the outlet of the leveling valve.

According to the present invention, as mentioned above, the air during kneeling in the city is not discharged to the outside, so it is economical, and furthermore, the left and right bellows contract one force and expand the other, so the kneeling effect is thicker. There is some real benefit.

[Brief explanation of the drawing]

1 and 2 are schematic plan views and rear views of an air suspension vehicle equipped with a kneeling device according to the present invention;
The figure is a schematic system diagram of the kneeling device of the present invention. 10------- Two-ring device, 12 Air suspension ton, 14------- Leveling/help two 16, 16
°−1−−−minute;! rl room, 18--111 sarntank, 20, 20'-----l loin, 22,
22°--1--Cant/X Lube 21--1--Ziaphram, 26--l movement means, 28-----2-
Linog control lower stage, 30----1 air ring, 32-
-111, 34----1 electromagnetic 5 (, 36--1-
-2-Lynx Inch. Birth IA'l 1 person 11 kidney car] - Industry Co., Ltd.

Claims (1)

[Scope of Claims] (l:) S: A surge tank having left and right divided chambers to which air is supplied from the q-air tank via a repellering valve, and left and right bellows connected to the divided chambers of the surge tank, respectively. In an air system with
A cut valve provided between the left and right portions of the surge tank; Normally, the volume of the left and right divided chambers is set to be equal, and the second position is to remove air from the 11 tll bellows that monitors the entrance and exit during kneeling and inject the air into the external bellows. and a kneeling control means that operates the driving means during kneeling and closes the valve. Features air suspension! 14 knee link equipment 1C2) The air suspension knee link device according to claim 1, wherein the driving drive is composed of a cylinder and a cylinder, and the piston of the cylinder is connected to the tire flammable. . (3) The kneeling control means comprises a solenoid valve that supplies fluid to the cylinder and the cut valve, and a kneeling switch that magnetically moves the solenoid valve. kneeling device in the air suspension of.