JP2915756B2 - Axle load distribution device used for rear suspension of rear two-axle vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rear two-axle rear
The present invention relates to an axle load distribution device used for a suspension.

[0002]

2. Description of the Related Art In general, a rear two-axle vehicle of this type, for example, a large rear-axle truck, has excellent driving force and, in particular, a tandem axle-trunnion type rear wheel having good road running accuracy.
Suspensions have been adopted. This tandem
Axle and trunnion type rear suspensions are generally designed in such a way that their loading capacity is evenly applied to the rear front axle and the rear rear axle, or is distributed at a predetermined ratio. However, in a vehicle in which only the rear axle is driven, if the distribution ratio is changed to reduce the axle weight ratio on the drive shaft side, when traveling on a bumpy road or slope, the shared load distributed to the drive axle Drive wheel slips due to insufficient braking, and on slippery road surfaces, the drive wheel causes slip and idles. Cannot be secured to the drive wheel. Further, after that, the shared load of the two axles increases the axle load on the drive axle, and at the same time, is distributed where the axle load is reduced on the driven axle. Is prone to brake lock.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to increase the axle load of a drive axle in a range in which the shared load of the rear two axles is distributed within an allowable load range so as to avoid overloading of each axle. It is an object of the present invention to provide an axle load distribution device used for a rear suspension of a rear two-axle vehicle that secures driving force at the time of light loading and ensures safe driving by avoiding brake lock of a driven axle. .

[0004]

Means corresponding to the object and the operation thereof
Air bag means supported by the frame to apply a load to the rear axle in the lifting direction, a pressure damper connected to the air bag means, and a supply pressure arranged in an air pressure supply pipe connecting the pressure damper to an air pressure source A pressure regulating valve set to
A normally open solenoid valve arranged in the air pressure supply pipe downstream of the pressure regulating valve, a relief valve connected to the pressure damper by an air pressure exhaust pipe and set to exhaust pressure, and an upstream side of the relief valve A normally closed solenoid valve arranged in the pneumatic discharge pipe, a relief valve connected to the pressure damper and set at a higher pressure than the supply pressure, and an electromagnetic circuit in the normally open and normally closed solenoid valves. At all times, including the brake switch connected to the coil, the rear axle is then lifted by its air bladder at that load so that the set shared load of the rear front axle is greater than without the effect of the air bladder. During braking, compressed air is discharged from the air bag means to temporarily release the function of the air bag means.

Further, according to the present invention, an air bag means supported by a frame to apply a load to a rear axle in a lifting direction, a pressure damper connected to the air bag means, and the pressure damper connected to an air pressure source. A pressure regulating valve arranged in the air pressure supply pipe and set to the supply pressure, a normally open solenoid valve arranged in the air pressure supply pipe downstream of the pressure regulating valve, and a pressure regulating valve in parallel with the solenoid valve A pressure regulating valve connected downstream to the air pressure supply pipe and set to exhaust pressure, a relief valve connected to the pressure damper at an air pressure exhaust pipe and set to exhaust pressure, and an upstream side of the relief valve A normally closed solenoid valve arranged in the pneumatic discharge pipe,
A relief valve connected to the pressure damper and set at a higher pressure than the supply pressure;
When compressed air is supplied to the air bag means including the switch, the air bag means secures responsiveness of load transmission,
Then, at any time, the rear axle is lifted by the air bag means at that load, so that the set shared load of the rear front axle is made larger than in a state in which the function of the air bag means is lacking. The compressed air is discharged from the air bag to temporarily release the function of the air bag means.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of an axle load distribution device used for a rear suspension of a rear two-axle vehicle according to the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show two rear axles having a driven front axle 43 and a driven rear axle 4.
Tandem axle
Embodiment 10 of the axle load distribution device used in the rear suspension of the rear two-axle vehicle of the present invention as applied to the trunnion type rear suspension 48 is shown, and in the truck 40, the tandem axle A trunnion-type rear suspension 48 includes a trunnion shaft 49 supported by left and right frames 41, 41 by left and right trunnion brackets 50, 50, and front and rear ends fixedly supported by left and right ends of the trunnion shaft 49. Left and right leaf springs 51, 51 for supporting the front axle 43 after drive and the rear axle 44 after drive, and the front and rear drive shafts below the trunnion shaft 49, the front axle 43 after drive and the rear axle 44 after drive Left and right flanges connecting the axle 43 and the driven rear axle 44 to its trunnion bracket 50. And cement and rear lower torque rod 52 and 53, the leaf spring 51, 51
The right and left front and rear left and right front axles 43 and 44 are connected to upper torque rod brackets 56 attached to the frames 41, 41 in alignment with the center of the trunnion shaft 49 above the rear axle 44. Assembled with the rear upper torque rods 54 and 55. Of course, two drive wheels 45, 45 are normally supported at both ends of the front axle 43 after the drive, and two driven wheels 46, 46 are respectively provided at both ends of the rear axle 44 after the drive. Is normally supported. The front axle 43 after the drive is connected to a differential (not shown) incorporated in a differential carrier 47.
Is normally linked to

[0007] The axle load distribution device 10 has a frame 4
Air bag means 11 supported on the rear axle 44 in the lifting direction, and a pressure damper 12 connected to the air bag means 11 by a communication pipe 19, and the pressure damper 12 is used as an air pressure source. Pneumatic supply pipe 2 to be connected
0, a pressure regulating valve 13 set to a supply pressure, a normally open solenoid valve 14 disposed in the air pressure supply pipe 20 downstream of the pressure regulation valve 13, and a pressure damper 12 in the air pressure discharge pipe 21. , A relief valve 15 set to the exhaust pressure thereof, a normally closed solenoid valve 16 disposed in the air pressure discharge pipe 21 on the upstream side of the relief valve 15, and a relief valve 15 connected to the pressure damper 12. In the relief valve 17 set to be higher than the supply pressure and the electromagnetic coil 2 in the electric circuit 25 of the normally open and normally closed solenoid valves 14 and 16.
The brake switch 26 connected to the electromagnetic coils 23 and 24 is connected in parallel with the brake switch 26 in the electric circuit 25 of the normally open and normally closed solenoid valves 14 and 16. And a pressure switch maintained at a predetermined value in the air bag means 11 by the pressure regulating valve 13, the relief valve 17 and the pressure damper 12. 11, a predetermined load is generated on the rear axle 44 in the lifting direction, and then the set shared load of the front axle 43 is made larger than a state where the function of the air bag means 11 is lacking. Further, during braking, compressed air is discharged from the air bag means 11 to temporarily release the function of the air bag means 11,
Still further, the compressed air is discharged from the air bag means 11 at the driver's will to release the function of the air bag means 11, and the tandem axle / trunnion type rear suspension 48 is functioning normally.

The air bag means 11 uses an air spring, and the air spring 11 has a bottom anchor plate 28 at its lower end and a top anchor plate 29 at its upper end. It is manufactured in shape and its bottom anchor plate 28 is screwed onto the cross beam bracket 30 which is adjacent to the rear of the rear axle 44 after its follow-up and passes between its left and right frames 41,41. The cross
After the top anchor plate 29 rests on the tip of the axle hanger 31, the predetermined load generated by the top anchor plate 29, that is, the predetermined force generated after the top anchor plate 29 is driven by the beam bracket 30 in the lifting direction. Frames 41, 4 where they can always be hung on rear axle 44
1 Of course, the cross beam bracket
The frame 30 is, as shown in FIG.
Both ends are fixedly attached to 1, 41
After the hanger 31 is driven as shown in FIG.
The cross beam fixedly attached to the rear axle 44
Extension above the bracket 30
The top anchor of the air spring 11
The tip is placed on a plate 29.

The pressure damper 12 employs a surge tank, and the surge tank 12 is a cross beam which is adjacent to the cross beam bracket 30 and passed between the left and right frames 41,41. 42
And is connected to the air spring 11 at the communication pipe 19 and to the reservoir tank 18 of the air pressure source at the air pressure supply pipe 20. Of course, the pneumatic sources are a compressor (not shown) driven by a diesel engine (not shown) mounted on the truck 40, a wet tank (not shown), and the reservoir tank 18. Normally composed of

A pressure regulating valve 13 set to the supply pressure is disposed in the pneumatic supply pipe 20, and reduces the compressed air discharged from the compressor to a constant pressure to supply the compressed air to the surge tank 12. The pressure in the air spring 11 is kept at the set value. In other words, the pressure regulating valve 13 constantly maintains the pressure in the air spring 11 at a predetermined value, thereby constantly generating the predetermined force used as the predetermined load on the air spring 11. By the way. In particular, the supply pressure increases the axle load on the front axle 43 after the drive in a range where the shared load of the two axles 43 and 44 is then distributed within the allowable load range and the axle load of each axle 43 and 44 is avoided. The setting is made so that the driving force can be secured when the vehicle is empty and lightly loaded.

The normally open type solenoid valve 14 is a normally open type two-way control solenoid valve. When the brake switch 26 is closed, a current flows through the electromagnetic coil 23 and the electromagnetic coil 23 is excited. And shut off the compressed air constantly being supplied from the reservoir tank 18 to the surge tank 12. Of course, the normally open solenoid valve 14
Operates in the same manner even when the manual switch 27 is closed, and functions similarly. That is, the normally open solenoid valve 14
Behaves and functions similarly at the will of the driver.

The relief valve 15 set to the exhaust pressure
Releases the compressed air to the atmosphere when the air spring 11 is temporarily released from generating the load and collapsed by the stroke of the rear suspension 48. Of course, the exhaust pressure of the relief valve 15 is set in advance in consideration of the response of load transmission when supplying compressed air.

The normally closed type solenoid valve 16 is a normally closed type two-way control solenoid valve. When the brake switch 26 is closed, a current flows through the electromagnetic coil 24 to excite the electromagnetic coil 24. Then, the compressed air which is opened and flows from the air spring 11 through the surge tank 12 flows to the relief valve 15 and is discharged to the atmosphere at the relief valve 15. Of course, the normally closed solenoid valve 16 operates and functions in the same manner even when the manual switch 27 is closed. That is, the normally closed solenoid valve 16 is similarly operated by the driver's will,
And it works similarly.

The relief valve 17, which is set higher than the supply pressure, is connected to the air pressure discharge pipe 21 by an auxiliary air pressure discharge pipe 22 on the upstream side of the normally closed solenoid valve 16, and the air spring 11 And surge
It functions as a protection valve for the tank 12.

As the brake switch 26, a brake lamp switch is used, while the manual switch 27 is arranged on the instrument panel and operated by a driver as required.

Next, the operation of the axle load distribution device 10 will be described in relation to the traveling of the truck. When the truck 40 is started and travels, the brake lamp switch 26 and the manual switch 27 are closed, the electromagnetic coils 23 and 24 are demagnetized and the electromagnetic valve 14 is opened, and at the same time, the electromagnetic valve 16 is opened. Is closed, the compressed air is reduced to a constant pressure by the pressure regulating valve 13 and the air spring 11 is released from the reservoir tank 18.
Supplied through the surge tank 12 to the air tank.
The spring 11 generates the predetermined load. Then, the load generated on the air spring 11 acts on the rear axle 44 after the driven via the axle hanger 31 in the lifting direction, so that the front axle 43 after the driving is pushed down by the predetermined load. Can be As described above, the shared load is increased on the front axle 43 after the driving, and at the same time, the shared load is reduced on the rear axle 44 after the driven. The truck 40 is appropriately distributed in the range, and is adapted to running conditions, road conditions, road surface conditions, and the like. When the vehicle is empty and lightly loaded, the driving force is secured, and starting and running are advantageous.

When a brake is applied to the truck 40 running with such axle load distribution, the brake lamp switch 26 is closed, so that current flows through the electromagnetic coils 23 and 24 and the electromagnetic coil 23 23 and 24 are energized, and the normally-open solenoid valve 14 is closed, while the normally-closed solenoid valve 16 is opened.

Since the normally open solenoid valve 14 is closed,
The pressure is reduced to a constant pressure by the pressure regulating valve 13 and the surge pressure is applied from the reservoir tank 18 to the air spring 11.
The compressed air supplied through the tank 12 is turned off, while the normally closed solenoid valve 16 is opened so that the air
The compressed air in the spring 11 is
After that, the air is discharged from the relief valve 15 into the atmosphere.
In this way, the compressed air in the air spring 11 is discharged to the atmosphere, so that the air spring 1
1 is temporarily released from the generation of the predetermined load during the brake, and accordingly, the shared load is applied to the rear axle 44 after the driven, that is, the axle load is returned by the predetermined load, and A brake lock on the driven wheel 46 is avoided.

FIG. 4 is used in the rear suspension of a rear two-axle vehicle of the present invention as applied to the tandem axle trunnion type rear suspension 48 of the heavy truck 40 shown in FIGS. A specific example 60 of the axle load distribution device is shown. This axle load distribution device 6
0 indicates that the pressure regulating valve 61 is set to its exhaust pressure, and is connected to the air pressure supply pipe 20 downstream of the pressure regulating valve 13 in parallel with the normally open solenoid valve 14 in the axle load distribution device 10. You. Specifically, the pressure regulating valve 61 is connected to the air pressure supply pipe 20 by an auxiliary air pressure supply pipe 62 at the inlet side and the outlet side of the normally-open solenoid valve 14, and the pressure regulator valve 61 is connected to the exhaust valve. Where the pressure is set, the minimum pressure can be secured in the air spring 11 and the surge tank 12, and when the compressed air is re-supplied to the air spring 11 after being exhausted, the load transmission of the air spring 11 is suppressed. This is where responsiveness is ensured.

As described above, the axle load distribution device 60 in which the pressure regulating valve 61 set to the exhaust pressure is added to the axle load distribution device 10 is provided.
Operates like 0 and functions similarly. Here, a detailed description of the operation of the axle load distribution device 60 is omitted.

As will be apparent from the specific embodiments of the present invention described above with reference to the drawings, one skilled in the art to which the present invention pertains will appreciate the subject matter of the present invention. Is the nature of the invention (na
), and are readily embodied in other aspects that are objectively perceived as inherent in them. Of course, the contents of the present invention are indispensable for the establishment of the invention corresponding to the subject of the invention.

[0022]

As can be understood from the above description, the axle load distribution device used for the rear suspension of the rear axle of the present invention is provided between the left and right frames adjacent to the rear of the rear axle.
Cross beam bracket fixedly attached to
And then the cross fixedly attached to the rear axle
・ An actuator that extends its tip above the beam bracket
On the sul hanger and its cross beam bracket
On the tip of the axle hanger
And then apply a load to the rear axle in the lifting direction
That the air bag unit, the pressure damper is connected to the air bag unit, a pressure regulating valve which is arranged in the air supply pipe is set to supply pressure to connect the pressure damper air pressure source, a downstream side of the pressure regulating valve A normally open solenoid valve arranged in the air pressure supply pipe, a relief valve connected to the pressure damper by an air pressure exhaust pipe and set to exhaust pressure, and arranged in the air pressure exhaust pipe upstream of the relief valve Normally closed solenoid valve, a relief valve connected to its pressure damper and set at a higher pressure than its supply pressure, and a brake connected to an electromagnetic coil in the electric circuit of the normally open and normally closed solenoid valves The switch includes a switch, so that in the axle load distribution device used for the rear suspension of the rear two-axle vehicle of the present invention, the rear axle always lifts a predetermined load generated in the air bag means thereafter. After that, the set share load of the front axle is made larger than the state lacking the function of the air bag means, and then the share load of the two axles is adapted to the load capacity, and the driving force is secured when the vehicle is empty and lightly loaded. In addition, at the time of heavy loading, the shared load of the two axles is distributed within the allowable load range to avoid overload of the axle on each axle, and on slippery roads, uneven roads, slopes The slip of the drive wheel and the slip of the drive wheel due to the slip are suppressed, and the starting and running are ensured,
During braking, the effect of the air bag unit is avoided brake lock temporarily solved by the driven wheels, and safe driving with them is ensured, further, the pressure damper
-Reduces the spring constant of the air bag means and compresses it.
When air is supplied to and exhausted from the air bag means, pressure fluctuations are small.
Of the vibration that affects the suspension
Generation is suppressed and compressed air is further discharged
When the minimum pressure is applied to the relief valve set to the exhaust pressure
Thus is secured to the air bag means and the pressure damper,
And the air bag means is suspension stroke
When compressed air is discharged into the atmosphere by crushing due to
The bag means has smooth expansion and contraction and durability, and
Also, structurally, the load generated in the air bag
Weight adjustment mechanism that can be applied to the center of the spring
All have a simple structure, light weight, and leaf / split.
To extend the leaf end to form the centerpiece
Normal leaf springs are used without any changes
The increase in weight and cost is suppressed, and the load is
Released from the limitation due to the strength of the eyeball, and then to the rear axle
Acts in the lifting direction, allowing a wide range of axle load distribution
And a pneumatic spring means between the fixed shaft and the body
The air bag means is more
The height is limited to the distance between the rear axle and its frame
Suspension stroke,
It is sufficiently absorbable, so that it is very useful and practical for rear axles.

The axle load distribution device used for the rear suspension of the rear two-axle according to the present invention is provided at the rear of the rear rear axle.
Is fixedly attached between the left and right frames next to
Cross beam bracket and then fixed to the rear axle
It's a cross beam bracket
Axle hanger with a tip extending upward
Its ax supported on a cross beam bracket
Place its tip on Le Hanger, and then rear axle
Air bag means acting on the load in the lifting direction, a pressure damper connected to the air bag means, and a pressure regulating valve arranged at an air pressure supply pipe connecting the pressure damper to an air pressure source and set to a supply pressure. A normally-open solenoid valve arranged in the air pressure supply pipe downstream of the pressure regulating valve, and connected to the air pressure supply pipe downstream of the pressure adjustment valve in parallel with the solenoid valve, and A pressure regulating valve to be set, a relief valve connected to the pressure damper with an air pressure discharge pipe and set to exhaust pressure, and a normally closed solenoid valve arranged in the air pressure discharge pipe upstream of the relief valve, Since it includes a relief valve connected to the pressure damper and set higher than the supply pressure, and a brake switch connected to an electromagnetic coil in the electric circuit of the normally open and normally closed solenoid valves, In the axle load distribution device used for the rear suspension of the rear two-axle vehicle of the invention, when the minimum pressure is secured in the air bag means and the compressed air is supplied again to the air bag means after exhaustion, the load transmission Responsiveness is ensured in the air bag means, and the rear axle is always subjected to a predetermined load generated in the air bag means in the lifting direction, and then the set shared load of the front axle lacks the function of the air bag means. After that, the shared load of the two shafts is adjusted to the load capacity, and when empty and lightly loaded, the driving force is secured and the start is advantageous, and when the heavy load is loaded, the shared load of the two shafts is The load is distributed within the allowable load range to prevent axle load from being excessively applied to each axle.Also, slippage of the drive wheel and slipping of the drive wheel due to the slip on a slippery road, a bumpy road, a sloping road, etc. are suppressed. Advances and traveling is ensured, during braking, the effect of the bladder means are avoided brake lock temporarily solved by the driven wheels, and safe driving with them is ensured, further, that
Pressure damper lowers the spring constant of the air bag means
When compressed air is supplied to and discharged from the air bag means,
Fluctuations can be reduced, it affects the suspension I accompanied
And the minimum pressure is
With its pressure regulating and relief valves set to exhaust pressure
The air bag means and pressure damper
The air bag means depends on the suspension stroke.
When the compressed air is discharged into the atmosphere due to collapse,
Excessive crushing of the step is prevented beforehand and the air bag means
Smooth expansion and contraction and durability are ensured, and compressed air
When supplying air, the response of load transmission is set to the exhaust pressure.
And pressure relief and relief valves.
Also, structurally, the load generated in the air bag
Weight adjustment mechanism that can be applied to the center of the spring
All have a simple structure, light weight, and leaf / split.
To extend the leaf end to form the centerpiece
Normal leaf springs are used without any changes
The increase in weight and cost is suppressed, and the load is
Released from the limitation due to the strength of the eyeball, and then to the rear axle
Acts in the lifting direction, allowing a wide range of axle load distribution
And a pneumatic spring means between the fixed shaft and the body
The air bag means is more
The height is limited to the distance between the rear axle and its frame
Suspension stroke,
It is sufficiently absorbable, so that it is very useful and practical for rear axles.

[Brief description of the drawings]

FIG. 1 is a rear suspension of a rear two-axle vehicle according to the present invention, which is applied to a tandem axle trunnion type rear suspension of a heavy truck using a front rear axle and a rear rear axle as rear two axles. It is the side view which showed the specific example of the axle load distribution device used in partial cross section.

FIG. 2 is a partial rear view of the axle load distribution device shown in FIG. 1 as viewed from the rear.

FIG. 3 is a pneumatic circuit diagram of the axle load distribution device shown in FIGS. 1 and 2;

FIG. 4 is a rear suspension of a rear two-axle vehicle according to the present invention, which is applied to a tandem axle trunnion type rear suspension of a heavy-duty truck that uses a front rear axle and a rear rear axle as rear two axles. It is a pneumatic circuit diagram of the example of the axle load distribution device used.

[Explanation of symbols]

 Reference Signs List 11 air bag means 12 pressure damper 13 pressure regulating valve set to supply pressure 14 normally open solenoid valve 15 relief valve set to exhaust pressure 16 normally closed solenoid valve 17 relief valve set to be higher than supply pressure 26 brake・ Switch 27 Manual switch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-169011 (JP, A) JP-A-6-320933 (JP, A) Fully open 55-109007 (JP, U) Really open 1960 95309 (JP, U) Japanese Patent Publication No. 1-31644 (JP, B2) (58) Fields surveyed (Int. Cl. ⁶ , DB name) B60G 17/015 B60G 5/04

Claims (16)

(57) [Claims] The left rear axle (44) is adjacent to the rear axle (44).
Fixedly mounted between the right frames (41, 41)
Cross beam bracket (30) and then the rear car
The cross beam fixedly attached to the shaft (44)
Arm extending above the bracket (30).
Xur Hanger (31) and his cross beam
Axle hanger supported on racket (30)
-Load its tip of (31) and then rear axle
(44) Air bag means (1 ) which acts on the load in the lifting direction
1) , a pressure damper (12) connected to the air bladder means (11) , and a pressure regulating valve arranged at an air pressure supply pipe connecting the pressure damper (12) to an air pressure source and set to a supply pressure ( 13) and a normally open solenoid valve (14) disposed in the air pressure supply pipe downstream of the pressure regulating valve (13 ).
A relief valve (15) connected to the pressure damper (12) by an air pressure discharge pipe and set to the exhaust pressure, and a normally closed type disposed in the air pressure discharge pipe upstream of the relief valve (15). Solenoid valve (16) and its pressure damper
A relief valve (17) connected to (12) and set at a pressure higher than its supply pressure, and its normally open and normally closed solenoid valves;
And a brake switch (26) connected to the electromagnetic coil in the electric circuit of (14, 16) . Wherein its bladder means (11), the axle load distribution apparatus used for biaxial vehicle rear suspension after of claim 1 is an air spring. 3. The pressure damper (12) includes a surge damper.
The axle load distribution device used for a rear suspension of a rear two-axle vehicle according to claim 1, which is a tank. 4. The axle load distribution device according to claim 1, wherein the brake switch (26) is a brake ramp switch. 5. The left rear axle (44) adjacent to the rear axle (44).
Fixedly mounted between the right frames (41, 41)
Cross beam bracket (30) and then the rear car
The cross beam fixedly attached to the shaft (44)
Arm extending above the bracket (30).
Xur Hanger (31) and his cross beam
Axle hanger supported on racket (30)
-Load its tip of (31 ) and then rear axle
(44) Air bag means (1 ) which acts on the load in the lifting direction
1) , a pressure damper (12) connected to the air bladder means (11) , and a pressure regulating valve arranged at an air pressure supply pipe connecting the pressure damper (12) to an air pressure source and set to a supply pressure ( 13) and a normally open solenoid valve (14) disposed in the air pressure supply pipe downstream of the pressure regulating valve (13 ).
A relief valve (15) connected to the pressure damper (12) by an air pressure discharge pipe and set to the exhaust pressure, and a normally closed type disposed in the air pressure discharge pipe upstream of the relief valve (15). Solenoid valve (16) and its pressure damper
A relief valve (17) connected to (12) and set at a pressure higher than its supply pressure, and its normally open and normally closed solenoid valves;
A brake switch (26) connected to the electromagnetic coil in the electrical circuit (14, 16), in that the brake switch (26) in the electric circuit of the normally open and normally closed solenoid valves (14, 16) An axle load distribution device for use in rear suspensions of rear two-axle vehicles, including a manual switch (27) connected in parallel to its electromagnetic coil. 6. As the air bag unit (11) is, axle load distribution apparatus used for biaxial vehicle rear suspension after of claim 5 is an air spring. 7. The pressure damper (12) has a surge damper.
The axle load distribution device used for a rear suspension of a rear two-axle vehicle according to claim 5, which is a tank. 8. The axle load distribution device according to claim 5, wherein the brake switch (26) is a brake ramp switch. 9. The left rear axle (44) is adjacent to the rear axle (44).
Fixedly mounted between the right frames (41, 41)
Cross beam bracket (30) and then the rear car
The cross beam fixedly attached to the shaft (44)
Arm extending above the bracket (30).
Xur Hanger (31) and his cross beam
Axle hanger supported on racket (30)
-Load its tip of (31) and then rear axle
(44) Air bag means (1 ) which acts on the load in the lifting direction
1) , a pressure damper (12) connected to the air bladder means (11) , and a pressure regulating valve arranged at an air pressure supply pipe connecting the pressure damper (12) to an air pressure source and set to a supply pressure ( 13) and a normally open solenoid valve (14) disposed in the air pressure supply pipe downstream of the pressure regulating valve (13 ).
And the pressure regulating valve (1 ) in parallel with the solenoid valve (14).
Downstream of 3) connected to its pneumatic supply pipe and then to a pressure regulating valve (61) set to exhaust pressure, and a relief connected to its pressure damper (12) by pneumatic discharge pipe and set to exhaust pressure Valve (15) and its relief valve (1
Normally closed solenoid valve upstream are disposed in the air discharge pipe 5) and (16), a relief valve that is set higher than that connected to the pressure damper (12) that supply pressure (1
7) and its normally open and normally closed solenoid valves (14, 16)
Brake connected to the electromagnetic coil in the electric circuit of
An axle load distribution device for use in a rear suspension of a rear axle including a switch (26) . 10. The axle load distribution device according to claim 9, wherein the air bag means (11) is an air spring. 11. The axle load distribution device according to claim 9, wherein the pressure damper (12) is a surge tank. 12. The brake switch (26)
The axle load distribution device used for a rear suspension of a rear two-axle vehicle according to claim 9, which is a brake lamp switch. 13. The rear rear axle (44) is adjacent to the rear side.
Fixedly attached between left and right frames (41, 41)
Cross beam bracket (30), followed by
Fixed to the axle (44)
Extends the tip above the arm bracket (30)
Axle hanger (31) and its cross beam
Axle hanks supported on brackets (30)
Mount its tip on the gir (31) and then rear axle
(44) Air bag means (1 ) which acts on the load in the lifting direction
1), a pressure damper (12) connected to the air bladder means (11) , and a pressure regulating valve arranged at an air pressure supply pipe connecting the pressure damper (12) to an air pressure source and set to a supply pressure ( 13) and a normally open solenoid valve (14) disposed in the air pressure supply pipe downstream of the pressure regulating valve (13 ).
And the pressure regulating valve (1 ) in parallel with the solenoid valve (14).
Downstream of 3) connected to its pneumatic supply pipe and then to a pressure regulating valve (61) set to exhaust pressure, and a relief connected to its pressure damper (12) by pneumatic discharge pipe and set to exhaust pressure Valve (15) and its relief valve (1
Normally closed solenoid valve upstream are disposed in the air discharge pipe 5) and (16), a relief valve that is set higher than that connected to the pressure damper (12) that supply pressure (1
7) and its normally open and normally closed solenoid valves (14, 16)
Brake connected to the electromagnetic coil in the electric circuit of
Switch (26) and its normally open and normally closed solenoid valves
A rear switch of a rear axle including a manual switch (27) connected to the electromagnetic coil in parallel with the brake switch ( 26) in the electric circuit of (14, 16). Axle load distributor used. 14. The axle load distributing device according to claim 13, wherein the air bag means (11) is an air spring. 15. The axle load distribution device according to claim 13, wherein the pressure damper (12) is a surge tank. 16. The brake switch (26)
14. The axle load distribution device used in a rear suspension of a rear two-axle vehicle according to claim 13, which is a brake lamp switch.