JP2000006633A - Air suspension vehicle emergency starting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air suspension vehicle emergency starting device having starting property of drive rotor improved on both two rear axles. SOLUTION: With regard to a two rear axle vehicle with both a rear front axle and a rear rear axle being drive axles, to which power is transmitted through interaxle differentials, and having air springs 5, 6 respectively equipped on them, an air supply/discharge control valve 16 is provided on a passage for supplying air to the air spring 6 on the rear rear axle side and a solenoid valve 17 is connected to the discharge side of the air supply/discharge control valve 16, while an emergency switch 18, which simultaneously actuates the solenoid valve 17 and the interaxle differential lock, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency start device for an air suspension vehicle having a drive shaft for both rear wheels.

[0002]

2. Description of the Related Art In an air suspension vehicle having two rear wheels,
There is a drive shaft only for the rear and front shafts and a drive shaft for both the two rear wheel shafts. If both of the two rear wheels are drive shafts, the rear axle, the rear front shaft and the rear rear shaft are both equipped with an interaxle differential for switching and transmitting power.

When the vehicle starts slipping on an inclined road or an uneven road or the like, when the slip (slip) occurs, if only the rear front shaft is a drive shaft, the air from the air spring on the driven wheel side of the rear rear shaft is discharged. The technique of increasing the axle weight of the drive shaft of the front and rear axles is disclosed in Japanese Utility Model Laid-Open Publication No. 63-51806 and 5-74.
No. 917.

[0004]

The air suspension is a front-rear control, and the left and right are also fixed by support beams. Therefore, the air suspension moves up and down at the same fulcrum with respect to the road surface input. It is difficult to obtain the front and rear swinging motion with the trunnion center as the fulcrum. When only the front and rear shafts are driving shafts, the rear rear shafts are driven wheels. When the rear front axle slips (slip) at the time of starting, the air of the air spring on the rear rear axle side can be exhausted to increase the rear front axle weight and run through. When both the shafts are drive shafts, when the rear rear wheel slips in the posture of the vehicle body on an inclined road or an uneven road, the power is lost to the rear rear shaft side, and the start running property is poor.

It is an object of the present invention to provide an air-suspension vehicle emergency starter in which the startability of a drive axle is improved for both rear axles.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a drive shaft to which power is transmitted via an interaxle differential for both a rear front shaft and a rear rear shaft. A rear wheel two-axle vehicle equipped with an air supply / discharge valve for supporting a chassis via an air spring and supplying / discharging working air to / from the air spring. An air supply / exhaust control valve is provided in the air supply path, a solenoid valve is connected to the exhaust side of the air supply / discharge control valve, and a switch for simultaneously operating the solenoid valve and locking of the interaxle differential is provided. When the shaft wheel is slipping, the air is released from the air spring on the rear rear shaft side by the switch to increase the rear front axle load, and at the same time, the interaxle differential is locked to transmit power to the rear front shaft. What you did It is an butterfly.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a rear front shaft, and 2 denotes a rear rear shaft. One end is fixed to leaf springs 3 and 4 which are attached to a chassis 7 so as to be vertically swingable. Air springs 5 and 6 for supporting the chassis 7 between the other ends of the leaf springs 3 and 4 and the chassis 7.
Is interposed. Reference numerals 8 and 9 denote wheels mounted on the rear front shaft 1 and the rear rear shaft 2, respectively.

The rear front shaft 1 and the rear rear shaft 2 are both drive shafts to which power is transmitted via an interaxle differential 10 shown in FIG.

The interaxle differential 10 transmits power to the rear rear shaft 2 via a through shaft 11 connected to a bevel gear and a propeller shaft 12 connected to the through shaft 11, and A drive gear 13 rotatably mounted on the rear front shaft 1 is provided in a locked state in which a sleeve 14 is provided on the through shaft 11 so as to be movable in the axial direction and engages with the drive gear 13. It also has a known structure for transmitting power.

The operation of the sleeve 14 in the axial direction is performed by a shift fork of a well-known air shift unit by operating an interaxle differential lock switch 15 (see FIG. 3) described later.

Therefore, in the present invention, as shown in FIG. 3, the air supply / discharge control valve 16 (cut valve or solenoid valve) is provided in the air supply path to the air spring 6 on the rear rear shaft 2 side. An electromagnetic switch 17 is connected to the exhaust side of the supply / discharge control valve 16, and an emergency switch 18 for simultaneously operating the electromagnetic valve 17 and the interaxle differential 10 is provided.
It is provided with. The inter-axle differential lock switch 15 and the emergency switch 18 are installed in the driver's cab so that the driver can operate the switch. It should be noted that the interaxle differential lock switch can be used alone as in the past.

Since the present invention has the structure as described above, when the wheel 9 of the rear rear shaft 2 slips in the posture of the vehicle body on an inclined road or an uneven road, the emergency valve 18 is pressed to release the electromagnetic valve 17. Is operated to make the exhaust side of the supply / discharge control valve 16 communicate with the atmosphere, and the air of the air spring 6 on the rear rear shaft 2 side is exhausted. As a result, the rear rear shaft 2 is removed, and the rear front shaft 1 is removed.
Of the rear front shaft 1 becomes a weighted wheel.

Further, in the present invention, by pressing the emergency switch 18, the air of the air spring 6 on the rear rear shaft 2 side is discharged, and at the same time, the interaxle differential 10 is locked to transmit power to the rear front shaft 1. is there.

Therefore, the rear rear shaft 2 is removed, the rear front shaft 1 has an increased axle load, and the rear front shaft 1 wheels 8 are weighted wheels, so that the ground contact of the rear front shaft 1 wheels 8 is improved. At the same time, the power transmitted to the rear front shaft 1 by the locking of the interaxle differential 10 improves the starting and running performance when the wheels 9 of the rear rear shaft 2 slip.

After the vehicle starts running, the emergency switch 18 is turned off by the driver to close the solenoid valve 17 and unlock the interaxle differential 10. In addition to the manual operation, the shift position and the traveling speed of the vehicle are detected by a sensor, and when the vehicle speed exceeds a predetermined speed, the electromagnetic valve 1
7 and unlocking of the interaxle differential 10 are also possible.

[0016]

As described above, according to the present invention, in an air suspension vehicle having a drive shaft for both rear wheels with a simple structure, the advantage of improving the emergency startability while maintaining the conventional essential structure. have.

[Brief description of the drawings]

FIG. 1 is a side view of a rear-wheel biaxial air suspension.

FIG. 2 is a cross-sectional view of an interaxle differential structure.

FIG. 3 is a structural view of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear front shaft 2 Rear rear shaft 3 Leaf spring 4 Leaf spring 5 Air spring 6 Air spring 7 Chassis 8 Wheel 9 Wheel 10 Interaxle differential 11 Through shaft 12 Propeller shaft 13 Drive gear 14 Sleeve 15 Interaxle differential lock switch 16 Supply / discharge control Valve 17 Solenoid valve 18 Emergency switch

Claims (1)

[Claims] 1. A drive shaft to which power is transmitted via an interaxle differential for both a rear front shaft and a rear rear shaft, supporting a chassis via an air spring on each of the two shafts, and A rear-wheel two-axle vehicle equipped with an air supply / discharge valve for supplying / discharging operating air to / from an air spring, wherein an air supply / discharge control valve is provided in an air supply path to the air spring on the rear rear axle side. A solenoid valve is connected to the exhaust side of the exhaust control valve, and a switch is provided that simultaneously operates the solenoid valve and the inter-axle differential lock. An air-suspension vehicle emergency starter characterized by discharging air from an air spring to increase the axle weight of the rear front axle and simultaneously locking the interaxle differential to transmit power to the rear front axle.