JP2895383B2 - Height adjustment device for air suspension vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle height adjusting device for increasing a rear vehicle height by increasing a pressure in an air spring of a vehicle equipped with an air suspension mechanism.

[0002]

2. Description of the Related Art Generally, in a vehicle equipped with an air suspension mechanism, an air spring is provided between a chassis frame and an axle, and compressed air is supplied to the air spring from an air tank via a leveling valve, and the air spring controls the air spring. The chassis frame is suspended. When the axle is displaced vertically relative to the chassis frame, the link mechanism pivotally supported by the axle rotates the switching lever of the leveling valve, and the rotation of this lever causes the supply and discharge of compressed air to the air spring. This is done with a leveling valve to keep the chassis frame at a certain height.

Conventionally, vehicles such as trucks and tractors having a vehicle height adjusting device using this air suspension mechanism have been known. This vehicle height adjustment device has an electromagnetic valve provided in the air flow path between the leveling valve and the air spring, and in the case of trucks, when loading and unloading luggage on the loading platform, to adjust the height of the platform to the height of the platform, In the case of a tractor, when the trailer is connected, the movement of the rear wheel is braked by a parking brake device provided on the rear wheel, and then the electromagnetic valve is moved from a compressed air source by closing a manual switch provided on a driver's seat. Is switched to supply the compressed air into the air spring, and the pressure in the air spring is increased to increase the vehicle height.

[0004]

In recent years, in order to improve the safety of vehicles, parking brake devices conventionally provided only on rear wheels have been provided also on front wheels. For this reason, if the pressure inside the air spring is raised to increase the vehicle height while the front and rear wheels are in the braking state, the wheelbase will be shorter than normal, so the front wheels will rotate backward and the rear wheels will rotate forward. Rotating force is generated. For this reason, if an excessive force is applied to each member to cause it to operate forcibly, the brake lining will be worn and each member will be damaged, and as a result, the durability of the members will be reduced. In order to avoid this problem, it is necessary to release the parking brake device when increasing the vehicle height.
However, increasing the vehicle height while releasing the parking brake device is very dangerous because the vehicle body becomes very unstable.

SUMMARY OF THE INVENTION It is an object of the present invention to adjust the height of a vehicle that can stably increase the height of the rear portion of the vehicle without damaging the members of the vehicle when parking brake devices are provided on the front and rear wheels. It is to provide a device.

[0006]

In order to achieve the above object, three configurations of the present invention will be described with reference to the drawings corresponding to the embodiments. A first aspect of the present invention is a vehicle 1 shown in FIG.
The rear wheel axle 12 is attached to a leaf spring 16 having a front end bonded to the spring bracket 9,
This is an improvement of the vehicle height adjusting device of the vehicle 10 configured to increase the rear height of the vehicle 10 by increasing the pressure in the air spring 13.

The characteristic configuration is that a front wheel brake device 26 for parking is provided on the front wheel 15a, a rear wheel brake device 27 for parking is provided on the rear wheel 12a, and one end is provided between the spring bracket 9 and the leaf spring 16. A connecting member 9a is pivotally supported by the bracket 9 and the other end is pivotally supported by the leaf spring 16, and is provided with a connecting member 9a swingably with respect to the spring bracket 9 and the leaf spring 16, and an electromagnetic lock for restricting or allowing the swing of the connecting member 9a. The device 25 is provided on the connecting member 9a, and a controller 41 for controlling the electromagnetic lock device 25 so as to allow the connecting member 9a to swing when the pressure in the air spring 13 is increased is provided.

A second aspect of the present invention is that a spring bracket 71 is fixed to a chassis frame 11 of a vehicle 10 as shown in FIGS.
A rear wheel axle 12 is mounted on a leaf spring 16 pivotally supported by the first and a rear end bonded to a chassis frame 11 via an air spring 13, and the pressure in the air spring 13 is increased to increase the rear vehicle height of the vehicle 10. This is an improvement of the vehicle height adjustment device of the vehicle 10 configured to increase the vehicle height.

The characteristic configuration is that a front wheel brake device 26 for parking is provided on the front wheel 15a, a rear wheel brake device 27 for parking is provided on the rear wheel 12a, and a spring bracket 71 is provided near the chassis frame 11 to provide an auxiliary leaf. A first pivot portion 71a pivotally supporting the front end of the second spring 72, and a second pivot portion 71b provided below the first pivot portion 71a at a predetermined interval and pivotally supporting the front end of the leaf spring 16, The rear end of the auxiliary leaf 72 is rotatably mounted on the upper surface of the rear wheel axle 12, and the substantially center portion of the leaf spring 16 is rotatably mounted on the lower surface of the rear wheel axle 12.

A third aspect of the present invention is a rear wheel axle 1 of a chassis frame 11 of a vehicle 10 as shown in FIGS.
2, a first air spring 91 and a second air spring 92 are provided before and after the first and second air springs 9.
This is a vehicle height adjustment device for an air suspension vehicle that is configured to increase the rear vehicle height of the vehicle 10 by increasing the pressure inside the vehicle.

The characteristic configuration is that the front wheel 15a is provided with a parking front wheel brake device 26, the rear wheel 12a is provided with a parking rear wheel brake device 27, and the front end is bonded to the first air spring 91 and the rear end is formed. Rear wheel axle 1
First leaf spring 9 pivotally supported by a spring bracket 93 fixed to the chassis frame 11 behind the second
4 is provided, and the rear wheel axle 12 is attached to a second leaf spring 96 having a front end pivotally supported by a first leaf spring 94 in front of the rear wheel axle 12 and a rear end bonded to a second air spring 92. is there.

[0012]

When the parking brake devices 26 and 27 are operated, the front wheels 15a and the rear wheels 12a are braked. When increasing the vehicle height, swing of the connecting member 9a is allowed, or the rear wheel axle 12 absorbs the change of the wheel base by rotating, and increases the pressure in the air spring 13 to increase the vehicle height. In order to return the vehicle height to the normal state, the vehicle is returned by drawing a reverse trajectory, and the swing of the connecting member 9a is stopped.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 show a vehicle height adjusting device according to a first embodiment of the present invention. A front wheel leaf spring (not shown) and a rear wheel leaf spring 16 for attaching a front wheel axle 15 and a rear wheel axle 12 are provided on a chassis frame 11 of the vehicle 10. In this example, the vehicle 10 is a tractor, and the parking brake device is a drum brake device. A front wheel 15a is mounted on the front wheel axle 15, and a rear wheel 12a is mounted on the rear wheel axle 12, respectively.
A spring bracket 9 is fixed to the chassis frame 11, and a front end of a rear wheel leaf spring 16 is pivotally supported by the spring bracket 9. The leaf spring has a rear end bonded to the chassis frame 11 via an air spring 13. The front wheel 15a is provided with a parking front wheel drum brake device 26, and the rear wheel 12a is provided with a parking rear wheel drum brake device 27. Vehicle 1
At 0, a compressed air source 21 as an air tank is mounted.
Compressed air is supplied to the air spring 13 from a compressed air source 21 via a leveling valve 22 and a lift valve 23.

As shown in FIG. 1, the air spring 13 has a plate 14 adhered to a bracket 11a fixed to the chassis frame 11, and a base 17 is attached to the rear end of the leaf spring 16;
Between them, a rubber film 18 formed in a cylindrical shape is provided.
The above-described compressed air is supplied to the inside of the rubber film 18.
A contact rubber 19 made of rubber is fixed to the upper surface of the base 17, and the plate 14 comes into contact with the top of the contact rubber 19 when the compressed air in the air spring 13 is discharged. The air spring 13 is configured to absorb the vibration generated by the unevenness of the road surface during traveling of the vehicle 10 by the elasticity of the compressed air stored inside the air spring 13 so as not to be transmitted to the chassis frame 11.

The rear wheel leveling valve 22 is a three-port three-position switching valve and is fixed to the chassis frame 11. The inlet port 22a of the valve 22 is connected to the compressed air source 21, and the outlet port 22b is connected to the lift valve 2
The exhaust port 22c is connected to the air spring 13 through the opening 3 and is open to the atmosphere. The valve 22 has a lever 22
d is pivotally connected, and the distal end of the lever 22d is connected to the link 16
A is pivotally connected to the leaf spring 16 via a. When the lever 22d is in a horizontal state as shown by a solid line, the inlet port 22a and the outlet port 22b are shut off, and the lever 22d is turned off.
When d is upward as indicated by the two-dot chain line, the inlet port 22a and the outlet port 22b communicate with each other, and when the lever 22d is downward as indicated by the broken line, the outlet port 22b and the exhaust port 22c communicate with each other. You.

A front wheel drum brake device 26 for parking
And the parking rear wheel drum brake device 27 are substantially the same device. Here, the drum brake device 27 will be described as a representative. As shown in FIG. 2, the drum brake device 27 includes a brake shoe 31 for braking the rear wheel 12a,
The vehicle includes a wheel cylinder 28 and a brake chamber 29 for operating the wheel cylinder. The wheel cylinder 28 includes a piston 28b that abuts the brake shoe 31, a piston rod 28d that drives the piston 28b via a wedge 28a, and a service brake hydraulic port 28c that is also used as a service brake in a normal running state. Have. The base end of the push rod 28d of the wheel cylinder 28 is connected to the piston rod 29a of the brake chamber 29 via an L-shaped link 28e. The brake chamber 29 is defined by a piston 29b, and a spring 29c is provided on the piston head side.

As shown in FIGS. 1 and 2, between the compressed-air source 21 and the air chamber 29d on the piston rod side of the brake chamber 29, a three-port two-position switching air pressure control type valve 36 is provided. The valve 36 is switched by a manually controlled valve 34 that switches between three ports and two positions. A control valve 33 is constituted by the valves 34 and 36. The port 34 a of the manually controlled valve 34 is connected to the compressed air source 21 and the port 34 a
b is connected to the signal pressure port 36d of the air pressure control type valve 36, and the port 34c is opened to the atmosphere. The port 36a of the air pressure control type valve 36 is connected to the compressed air source 21, and the port 36b is connected to the front wheel brake chamber 29 and the rear wheel brake chamber 29 of the drum brake device provided on the front wheel 15a and the rear wheel 12a, respectively. Connected and the exhaust port 36c is opened to the atmosphere. When the signal pressure port 34d of the manually controlled valve 34 is operated to supply compressed air to the signal pressure port 36d of the air pressure controlled valve 36, the ports 36b and 36c communicate with each other, and the compressed air in the brake chamber 29 Is discharged from the port 36c.

As shown in FIG. 3, the chassis frame 11 is made of a steel material having a U-shaped cross section, and the spring bracket 9 is fixed by bolts 9b. At the lower end of the spring bracket 9, an insertion hole 9c is provided. On each side of the spring bracket 9 in the vehicle width direction, the upper end of a pair of connecting members 9a inserts a stepped bolt 8a into the insertion hole 9c and a nut 8b and a screw. It is attached rotatably by joining. A front end of a leaf spring 16 is rotatably attached to a lower end of the connecting member 9a by a stepped bolt 8a and a nut 8b. Mounting hole 1 at front end of leaf spring 16
A locking piece 16c protrudes along the connecting member 9a on one side of the peripheral edge of 6b in an attached state, and an insertion hole 16d is provided substantially at the center of the locking piece 16c. An insertion hole 9d is provided at a position corresponding to the insertion hole 16d on one side of the pair of connection members 9a, and an electromagnetic lock device 25 is provided on the back surface of the one connection member 9a so as to cover the insertion hole 9d.

The electromagnetic lock device 25 has a plunger 25a. The plunger 25a is inserted into the insertion hole 9 of the connecting member 9a.
When it protrudes into d, the insertion hole 9d and the insertion hole 16d provided in the locking piece 16c are inserted, and the rotation between the leaf spring 16 and the connecting member 9a is stopped. The control output of the controller 41 is connected to the electromagnetic lock device 25, and when an ON signal is received from the controller 41, the protrusion amount of the rod 25a is reduced as shown by the broken line in FIG. As a result, the leaf spring 16 and the connecting member 9a can swing.

Air flow path 43 connected to compressed air source 21
An air flow path 44 branched from the port 2 of the lift valve 23
3c. The elevating valve 23 is a three-port three-position switching electromagnetically controlled valve. The other port 23 b is connected to the air spring 13, and the port 23 a is connected to the outlet port 22 b of the leveling valve 22. The manual switches 64 and 66 are connected to the control input of the controller 41, and the control output of the controller 41 is connected to the electromagnetic lock device 25 and the signal pressure ports 23d and 23e of the elevating valve 23. The controller 41 is provided with a timer 69. The timer 69 turns on the electromagnetic lock device 25 for a predetermined time when the manual switch 64 and the manual switch 66 are turned off from on.

The operation of the thus-configured vehicle height adjusting device for an air suspension vehicle will be described. When the vehicle 10 connects the trailer to tow the trailer, the vehicle 10 is first moved to a position where the kingpin provided at the front of the trailer and the coupler provided at the vehicle 10 can be coupled. In this state, when the driver in the driver's seat turns on the manually controlled valve 34 for the parking drum brake device, compressed air from the compressed air source 21 is supplied to the signal pressure port 36d of the air pressure controlled valve 36. The port 36b communicates with the port 36c, and compressed air in the air chamber 29d of the brake chamber 29 shown in FIG.
6c. This allows rods 29a, 28d
The piston 28b is pressed against the brake shoe 31 via the wedge 28a, and the front wheel 15a and the rear wheel 12a are braked.

Next, the driver turns on the manual switch 64 to increase the rear height of the vehicle 10 to connect the kingpin and the coupler. The controller 41 turns on the electromagnetic lock device 25 and the signal pressure port 23d of the elevating valve 23. As a result, the rod 25a provided in the electromagnetic lock device 25 is separated from the insertion hole 16d provided in the locking piece 16c of the leaf spring 16 to allow swinging between the leaf spring 16 and the connecting member 9a, and to allow the lifting valve 2
3 shuts off the outlet port 22b of the leveling valve 22, supplies the air from the air flow path 44 to the air spring 13, and increases the vehicle height. At this time, the displacement of the wheel base is absorbed by the swing of the connecting member 9a.

When the vehicle height becomes high and reaches an appropriate height, the manual switch 66 of the controller 41 is turned on. The controller 41 turns off the signal pressure port 23d of the lift valve 23 and turns on the signal pressure port 23e of the lift valve 23. As a result, the elevation valve 23 is connected to the leveling valve 22.
, The air from the air flow path 44 and the port 23b to the air spring 13 are shut off to stop the rise of the vehicle height and maintain the raised state.

Next, the manual switches 64 and 66 are turned off in order to complete the connection of the trailer and return the vehicle height to the normal state. The controller 41 sets the electromagnetic lock device 25 to the timer 6
9 keeps the ON state for a predetermined time, and turns off the signal pressure port 23e of the elevating valve 23. As a result, the elevating valve 23 is connected to the outlet port 22 b of the leveling valve 22.
And the air spring 13 are communicated with each other to shut off the air from the air flow path 44. The air in the air spring 13 is discharged from the discharge port 22c by the leveling valve 22 until the vehicle height returns to the normal state, returns to the normal state, and then the timer expires, and the leaf spring 16 and the connecting member 9a are again operated by the electromagnetic lock device 25. Is locked.

FIGS. 4, 6 and 7 show a vehicle height adjusting device according to a second embodiment of the present invention. 4, 6, and 7, the same reference numerals as those in FIG. 1 indicate the same components. Although not shown in FIGS. 4, 6 and 7, this vehicle height adjusting device includes the parking drum brake devices 26 and 27 and the rear wheel leveling valve 22 shown in FIG.

The spring bracket 71 provided on the chassis frame 11 is mounted on the chassis frame 11 as shown in FIG.
It has a first pivot 71a provided in the vicinity and a second pivot 71b provided at a predetermined interval below the first pivot 71a. The auxiliary leaf 7 is provided on the first pivot 71a.
The front end of the leaf spring 16 is rotatably attached to the second pivot 71b by a bolt 74a and a nut 74b. The auxiliary leaf 72 has holes for pivotal support at both ends, and its rear end is rotatably attached to a pivotal support portion 12 b provided on the upper surface of the rear wheel axle 12.
The rear end of the leaf spring is adhered to a chassis frame 11 via an air spring 13, and a rear wheel axle 12 is rotatably attached to a substantially central portion of the chassis frame 11 by a pivot 12 c provided on a lower surface thereof.

The operation of the thus-configured vehicle height adjusting device for a vehicle with an air suspension will be described. First, the vehicle 10 is moved in the same manner as in the first embodiment, and the front wheel 15a and the rear wheel 12a are braked by operating the parking drum brake device. Next, the driver turns on the manual switch 64 shown in FIG. 1 to increase the rear height of the vehicle 10 to connect the kingpin and the coupler 10a. The controller 41 turns on the signal pressure port 23d of the lift valve 23. As a result, the elevating valve 23 shuts off the outlet port 22b of the leveling valve 22, and supplies the air from the air flow path 44 to the air spring 13 to increase the vehicle height. At this time, as the rear vehicle height of the vehicle increases as shown in FIG. 7, the rear wheel axle 12 rotates forward of the vehicle as indicated by the solid line arrow, thereby rotating the rear wheel 12a to absorb the displacement of the wheel base.

When the vehicle height becomes high and reaches an appropriate height, the manual switch 66 of the controller 41 is turned on. The controller 41 turns off the signal pressure port 23d of the lift valve 23 and turns on the signal pressure port 23e of the lift valve 23. As a result, the elevation valve 23 is connected to the leveling valve 22.
, The air from the air flow path 44 and the port 23b to the air spring 13 are shut off to stop the rise of the vehicle height and maintain the raised state.

Next, the manual switches 64 and 66 are turned off to complete the connection of the trailer and return the vehicle height to the normal state. The controller 41 turns off the signal pressure port 23e of the elevating valve 23. As a result, the elevating valve 23 is connected to the outlet port 22 b of the leveling valve 22 and the air spring 1.
3 and the air from the air flow path 44 is shut off. The air in the air spring 13 is discharged from the discharge port 22c by the leveling valve 22 until the vehicle height becomes a normal state. At this time, the rear wheel axle rotates in the reverse direction of the trajectory drawn when the rear vehicle height of the vehicle increases, as shown by the dashed arrow in FIG.

FIGS. 8 and 10 show a third embodiment of the present invention. 8 and 10, the same reference numerals as those in FIG. 1 indicate the same components. Although not shown in FIGS. 8 and 10, the vehicle height adjusting device includes the parking drum brake devices 26 and 27 and the rear wheel leveling valve 22 shown in FIG. A first air spring 91 and a second air spring 92 are disposed on a chassis frame 11 of the vehicle 10 before and after a rear wheel axle 12 via respective brackets 11a. First air spring 91 and second air spring 9
2 is the same as that described in the first embodiment, and in any case, the outlet port 2 of the leveling valve 22 shown in FIG.
The internal pressure is adjusted by the air from 2b. Therefore, the ports 23b of the lift valve 22 shown in FIG. 1 are connected to the air springs 91 and 92. Chassis frame 1
A spring bracket 93 is fixed to the front of the second air spring 92 provided on the rear of the vehicle 1 and to the rear of the rear wheel axle 12, and the rear end of the first leaf spring 94 is pivotally supported by the spring bracket 93. The front end of the first leaf spring 94 is bonded to the chassis frame 11 via the first air spring 91. A first leaf spring 94 in front of the rear wheel axle 12 has a second leaf spring 96.
Is provided with a pivotal support member 94a for pivotally supporting the front end of the robot. The rear end of the second leaf spring 96 is bonded to the chassis frame 11 via the second air spring 92. The rear wheel axle 12 is attached to the second leaf spring 96.

The operation of the thus-configured vehicle height adjusting device for a vehicle with an air suspension will be described. First, the vehicle 10 is moved in the same manner as in the first embodiment, and the front wheel 15a and the rear wheel 12a are braked by operating the parking drum brake device. Next, the driver turns on the manual switch 64 shown in FIG. 1 to increase the rear height of the vehicle 10 to connect the kingpin and the coupler 10a. The controller 41 turns on the signal pressure port 23d of the lift valve 23. Thus, the elevating valve 23 shuts off the outlet port 22b of the leveling valve 22, and supplies the air from the air flow path 44 to each of the air springs 91 and 92 to increase the vehicle height. At this time, when the rear wheel 12a is going to rotate forward as the rear vehicle height of the vehicle 10 increases as shown in FIG. 10, the first air spring 91 located forward extends and the rear wheel axle rotates backward. When trying to do so, the rear second air springs 92 are each extended. Leaf spring 94
And 96 swing to rotate the rear wheel axle 12, thereby rotating the rear wheel 12a to absorb the displacement of the wheel base.

When the height of the vehicle increases and reaches an appropriate height, the manual switch 66 of the controller 41 is turned on. The controller 41 turns off the signal pressure port 23d of the lift valve 23 and turns on the signal pressure port 23e of the lift valve 23. As a result, the elevation valve 23 is connected to the leveling valve 22.
The port 23b to the outlet port 22b, the air from the air flow path 44, and the air springs 91 and 92 is shut off to stop the rise of the vehicle height and maintain the raised state.

Next, the manual switches 64 and 66 are turned off to complete the connection of the trailer and return the vehicle height to the normal state. The controller 41 turns off the signal pressure port 23e of the elevating valve 23. As a result, the elevating valve 23 is connected to the outlet port 22 b of the leveling valve 22 and the air spring 1.
3 and the air from the air flow path 44 is shut off. The air in each of the air springs 91 and 92 is discharged by the leveling valve 22 until the vehicle height reaches a normal state.
discharged from c. At this time, the rear wheel axle draws the reverse of the trajectory drawn when the rear vehicle height of the vehicle increases, and returns to the normal state.

In the above embodiment, an electromagnetic valve is used as the elevating valve. However, an air pressure control type valve or another type of valve may be used. In the above embodiment, the timer is provided in the controller. However, the timer may not be provided if the swing of the connecting member 9a is suppressed when the vehicle height is lowered by the air circuit.

Although the above embodiment has been described using a tractor, the present invention is not limited to the tractor but can be applied to other vehicles such as a truck 10 as shown in FIGS. 5 and 9, the same reference numerals as those in FIGS. 4 and 8 indicate the same components.

Although the above embodiment has been described using a drum brake device, another brake device such as a disc brake device may be used. In this case, a disc brake device may be used for both the front wheel and the rear wheel, or a drum brake device may be used for one of the front wheel and the rear wheel, and a disc brake device may be used for the other.

[0037]

As described above, according to the present invention, when the front wheel and the rear wheel are braked by the parking brake device, the connecting member or the rear wheel axle is used when increasing the vehicle height at the rear of the vehicle. By swinging the wheel, the displacement of the wheel base can be absorbed. For this reason, there is no wear of the brake lining or damage to each member due to excessive force being applied to each member. In addition, in a normal braking state, all the wheels are braked by the parking drum brake device on the front wheels and the rear wheels, so that the safety during parking is high.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a parking rear wheel drum brake device of a vehicle height adjusting device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of the parking drum brake device.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a side view of a tractor equipped with a vehicle height adjusting device according to a second embodiment of the present invention.

FIG. 5 is a side view of a truck equipped with a vehicle height adjusting device according to a second embodiment of the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is a side view showing a state in which a rear portion of a vehicle on which the vehicle height adjusting device according to the second embodiment of the present invention is mounted is raised.

FIG. 8 is a side view of a tractor equipped with a vehicle height adjusting device according to a third embodiment of the present invention.

FIG. 9 is a side view of a truck equipped with a vehicle height adjusting device according to a third embodiment of the present invention.

FIG. 10 is a side view showing a state in which a rear portion of a vehicle on which the vehicle height adjusting device according to the third embodiment of the present invention is mounted is raised.

[Explanation of symbols]

 9, 71, 93 Spring bracket 9a Connecting member 10 Vehicle 11 Chassis frame 12 Rear wheel axle 12a Rear wheel 13 Air spring 15a Front wheel 16 Leaf spring 25 Electromagnetic lock device 26 Parking front wheel brake device 27 Parking rear wheel brake device 41 Controller 71a 1st pivot 71b 2nd pivot 72 auxiliary leaf 91 1st air spring 92 2nd air spring 94 1st leaf spring 96 2nd leaf spring

Claims (6)

(57) [Claims] A spring bracket (9) is fixed to a chassis frame (11) of a vehicle (10), a front end is pivotally supported by the spring bracket (9), and a rear end is connected to the chassis via an air spring (13). A rear wheel axle (12) is attached to a leaf spring (16) bonded to a frame (11), and the pressure in the air spring (13) is increased to increase the pressure in the vehicle.
(10) In a vehicle height adjustment device for an air suspension vehicle configured to increase a rear vehicle height, a front wheel brake device (26) is provided for a front wheel (15a), and a parking wheel is provided for a rear wheel (12a). A rear wheel brake device (27) is provided, and the spring bracket (9) and the leaf spring are provided.
Between (16), one end is pivotally supported by the spring bracket (9) and the other end is pivotally supported by the leaf spring (16) so as to be swingable with respect to the spring bracket (9) and the leaf spring (16). A connecting member (9a) is provided, an electromagnetic lock device (25) for suppressing or allowing the swing of the connecting member (9a) is provided on the connecting member (9a), and a pressure inside the air spring (13) is reduced. The electromagnetic lock device is configured to allow the connecting member (9a) to swing when ascending.
A vehicle height adjustment device for an air suspension vehicle, comprising a controller (41) for controlling (25). 2. The vehicle height adjusting device according to claim 1, wherein each of the parking front wheel brake device and the parking rear wheel brake device is a drum brake device. 3. The vehicle height adjusting device according to claim 1, wherein the parking front wheel brake device (26) and the parking rear wheel brake device (27) are each a disc brake device. 4. The vehicle according to claim 1, wherein one of the parking front wheel brake device (26) and the parking rear wheel brake device (27) is a drum brake device, and the other is a disc brake device. High adjustment device. 5. A spring bracket (71) is fixed to a chassis frame (11) of a vehicle (10), a front end is pivotally supported by the spring bracket (71), and a rear end is connected to the chassis via an air spring (13). A rear wheel axle (12) is attached to a leaf spring (16) bonded to a frame (11), and the pressure in the air spring (13) is increased to increase the pressure in the vehicle.
(10) In a vehicle height adjustment device for an air suspension vehicle configured to increase a rear vehicle height, a front wheel brake device (26) is provided for a front wheel (15a), and a parking wheel is provided for a rear wheel (12a). A rear wheel brake device (27) is provided, and the spring bracket (71) is attached to the chassis frame (1).
1) The first, which is provided in the vicinity and pivotally supports the front end of the auxiliary leaf (72)
A pivot portion (71a) and a second pivot portion (71b) provided below the first pivot portion (71a) at a predetermined interval and pivotally supporting the front end of the leaf spring (16); The rear end of the auxiliary leaf (72) is rotatably mounted on the upper surface of the rear wheel axle (12), and the leaf spring (1) is mounted on the lower surface of the rear wheel axle (12).
6) A vehicle height adjusting device for an air suspension vehicle, wherein a substantially central portion of the vehicle is rotatably mounted. 6. A first air spring (91) and a second air spring (92) are provided before and after a rear wheel axle (12) of a chassis frame (11) of a vehicle (10), and the first and second air springs are provided. (2) A vehicle height adjusting device for an air suspension vehicle configured to increase a rear vehicle height of the vehicle (10) by increasing a pressure in an air spring (91, 92), A parking front wheel brake device (26) is provided, a rear wheel (12a) is provided with a parking rear wheel brake device (27), a front end is bonded to the first air spring (91), and a rear end is the rear wheel. A first leaf spring (94) pivotally supported by a spring bracket (93) fixed to a chassis frame (11) behind the axle (12), and a first leaf spring in front of the rear wheel axle (12); spring
(94) has a front end pivotally supported and a rear end connected to the second air spring (9).
A vehicle height adjusting device for an air suspension vehicle, wherein the rear wheel axle (12) is attached to a second leaf spring (96) bonded to 2).