CN107116986B - A kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle - Google Patents
A kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle Download PDFInfo
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- CN107116986B CN107116986B CN201710303011.0A CN201710303011A CN107116986B CN 107116986 B CN107116986 B CN 107116986B CN 201710303011 A CN201710303011 A CN 201710303011A CN 107116986 B CN107116986 B CN 107116986B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/154—Fluid spring with an accumulator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/40—Type of actuator
- B60G2202/41—Fluid actuator
- B60G2202/413—Hydraulic actuator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/40—Type of actuator
- B60G2202/41—Fluid actuator
- B60G2202/416—Fluid actuator using a pump, e.g. in the line connecting the lower chamber to the upper chamber of the actuator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/02—Trucks; Load vehicles
- B60G2300/026—Heavy duty trucks
- B60G2300/0262—Multi-axle trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a kind of big stroke adjustment systems of bodywork height for multi-axle heavy type vehicle, including hydraulic power unit and lifting pilot unit, hydraulic power unit includes oil inlet pipe, oil return pipe, oil distributing pipe, and the first branch oil pipe, the second branch oil pipe, third branch oil pipe and the 4th branch oil pipe that connect respectively with oil distributing pipe；Lifting pilot unit is made of the draft hitch in all vehicle bridge, draft hitch includes Top Crossbeam, lower cross arm and hydro-pneumatic spring, all vehicle bridge are divided into the preceding bridge group being made of m vehicle bridge and the rear axle group being made of n vehicle bridge, hydro-pneumatic spring on the left of preceding bridge group is connect with the first branch oil pipe respectively, hydro-pneumatic spring on the right side of preceding bridge group is connect with the second branch oil pipe respectively, hydro-pneumatic spring on the left of rear axle group is connect with third branch oil pipe respectively, and the hydro-pneumatic spring on the right side of rear axle group is connect with the 4th branch oil pipe respectively.It has the advantages that structure is simple, it is easy to implement, control is flexible, it is big, applied widely that stroke is turned up.
Description
Technical field
The present invention relates to a kind of vehicle height-regulating devices, and in particular to a kind of bodywork height adjusting for multi-axle heavy type vehicle
System.
Background technique
In automotive field, multi-axle heavy type vehicle is since load is big, traveling road conditions are complicated, to the more demanding of its passability,
This just needs vehicle to have the adjustable function of bodywork height.Bodywork height regulation technology based on hydro pneumatic suspension is with its bearing capacity
Greatly, it compact-sized, the advantages that function degrees of fusion is high, is applied in heavy vehicles more and more.But it is existing to be based on oil gas
The vehicle body height-regulating generally existing height-regulating stroke of technology of suspension is small, poor synchronization, stability is poor, control is not flexible, speed is non-adjustable,
The small problem of the scope of application.Especially for special vehicle, the special operation conditions such as railway transportation are often faced, this requires vehicle bodies
Height-adjustable stroke wants sufficiently large, and current vehicle body is turned up technology and is unable to satisfy its requirement.
Summary of the invention
The object of the present invention is to provide a kind of big stroke adjustment systems of bodywork height for multi-axle heavy type vehicle, have
Structure is simple, implements easy, control flexibly, big, the applied widely advantage of stroke is turned up, and can effectively improve vehicle using the present invention
The synchronism and stability that body is turned up.
To solve above-mentioned technical problem in the prior art, the present invention provides a kind of vehicle bodies for multi-axle heavy type vehicle
The big stroke adjustment system of height, including hydraulic power unit and lifting pilot unit, the hydraulic power unit include oil inlet pipe,
Oil return pipe, oil distributing pipe, and the first branch oil pipe, the second branch oil pipe, third branch oil pipe and the 4th that are connect respectively with oil distributing pipe
One end of oil pipe, the oil inlet pipe and oil return pipe is connect with oil distributing pipe respectively, and the other end of oil inlet pipe and oil return pipe is used for and oil
Source connection；The lifting pilot unit is made of the draft hitch in all vehicle bridge, draft hitch include Top Crossbeam, lower cross arm and
The inner end of hydro-pneumatic spring, Top Crossbeam and lower cross arm is corresponding hinged by the first pin shaft and the second pin shaft and vehicle frame, and Top Crossbeam is under
The outer end correspondence of transverse arm is equipped with the first flexural pivot and the second flexural pivot, and the first flexural pivot and the second flexural pivot are connect with wheel group respectively, oil gas
The upper end of spring is hinged by the first oscillating bearing and vehicle frame, and the lower end of hydro-pneumatic spring is cut with scissors by second joint bearing and lower cross arm
It connects；All vehicle bridge are divided into the preceding bridge group being made of m vehicle bridge and the rear axle group being made of n vehicle bridge, and preceding all left sides of bridge group are outstanding
The hydro-pneumatic spring epicoele of rack device is connect respectively with the first branch oil pipe and the first branch oil pipe between hydro-pneumatic spring and oil distributing pipe
It is equipped with the first solenoid directional control valve, the hydro-pneumatic spring epicoele of preceding all right side draft hitch of bridge group is connect with the second branch oil pipe respectively
And the second solenoid directional control valve is equipped on the second branch oil pipe between hydro-pneumatic spring and oil distributing pipe, all left side suspension dresses of rear axle group
The hydro-pneumatic spring epicoele set connect with third branch oil pipe respectively and sets on the third branch oil pipe between hydro-pneumatic spring and oil distributing pipe
Have a third solenoid directional control valve, the hydro-pneumatic spring epicoele of all right side draft hitch of rear axle group connect respectively with the 4th branch oil pipe and
The 4th branch oil pipe between hydro-pneumatic spring and oil distributing pipe is equipped with the 4th solenoid directional control valve, and oil inlet pipe is equipped with the 5th electromagnetic switch
Valve, oil return pipe are equipped with the 6th solenoid directional control valve, wherein m >=1, n >=1.
Further, the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the invention, wherein described
The first branch oil pipe between first solenoid directional control valve and oil distributing pipe is equipped with the first proportional flow control valve, the second solenoid directional control valve and point
The second branch oil pipe between oil pipe is equipped with the second proportional flow control valve, the third branch oil between third solenoid directional control valve and oil distributing pipe
Pipe is equipped with third proportional flow control valve, and the 4th branch oil pipe between the 4th solenoid directional control valve and oil distributing pipe is equipped with the 4th ratio stream
Measure valve.
Further, the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the invention, wherein described
Oil inlet pipe between 5th solenoid directional control valve and oil distributing pipe is equipped in line check valve；It is equipped between the oil return pipe and oil inlet pipe
Overflow pipe, overflow pipe are equipped with proportional pressure control valve, and the tie point of overflow pipe and oil inlet pipe is in the 5th solenoid directional control valve and oil inlet
Between check valve, the tie point of overflow pipe and oil return pipe is in side of the 6th solenoid directional control valve relative to oil sources.
Further, the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the invention, wherein described
First solenoid directional control valve and the first branch oil pipe between nearest hydro-pneumatic spring are equipped with first pressure sensor；Second electricity
Magnetic reversal valve and the second branch oil pipe between nearest hydro-pneumatic spring are equipped with second pressure sensor；Third electromagnetic switch
Valve and the third branch oil pipe between nearest hydro-pneumatic spring are equipped with third pressure sensor；4th solenoid directional control valve and away from
The 4th pressure sensor is equipped with from the 4th branch oil pipe between nearest hydro-pneumatic spring；5th solenoid directional control valve and oil inlet are unidirectional
Oil inlet pipe between valve is equipped with the 5th pressure sensor.
Further, the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the invention, wherein described
First solenoid directional control valve and the first branch oil pipe between nearest hydro-pneumatic spring are equipped with the first external oil-filled check valve；The
Two solenoid directional control valves and the second branch oil pipe between nearest hydro-pneumatic spring are equipped with the second external oil-filled check valve；Third
Solenoid directional control valve and the third branch oil pipe between nearest hydro-pneumatic spring are equipped with the external oil-filled check valve of third；4th electricity
Magnetic reversal valve and the 4th branch oil pipe between nearest hydro-pneumatic spring are equipped with the 4th external oil-filled check valve；5th electromagnetism
Reversal valve is equipped with the 5th external oil-filled check valve relative to the oil inlet pipe of oil sources side.
Further, the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the invention, wherein described
Shut-off valve and bidirectional high-pressure filter are additionally provided on oil inlet pipe between 5th solenoid directional control valve and the 5th external oil-filled check valve.
Further, the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the invention, wherein described
The 7th solenoid directional control valve, preceding bridge are equipped on the first branch oil pipe between the adjacent hydro-pneumatic spring of preceding all left side draft hitch of bridge group
The 8th solenoid directional control valve, the rear axle are equipped on the second branch oil pipe between the adjacent hydro-pneumatic spring of all right side draft hitch of group
The 9th solenoid directional control valve, rear axle group institute are equipped on third branch oil pipe between the adjacent hydro-pneumatic spring of all left side draft hitch of group
Have and is equipped with the tenth solenoid directional control valve on the 4th branch oil pipe between the adjacent hydro-pneumatic spring of right side draft hitch.
Further, the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the invention, wherein described
The cavity of resorption of hydro-pneumatic spring is connected with the first one-way throttle valve and the first accumulator in turn in preceding all left side draft hitch of bridge group
And connect the first accumulator with the epicoele of corresponding hydro-pneumatic spring, and make hydro-pneumatic spring in all left side draft hitch of preceding bridge group
The arrival end of corresponding first accumulator homogeneously connects；In preceding all right side draft hitch of bridge group the cavity of resorption of hydro-pneumatic spring according to
It is secondary to be connected with the second one-way throttle valve and the second accumulator and connect the second accumulator with the epicoele of corresponding hydro-pneumatic spring, and
The arrival end of corresponding second accumulator of hydro-pneumatic spring homogeneously connects in all right side draft hitch of bridge group before making；Rear axle group institute
There is the cavity of resorption of hydro-pneumatic spring in the draft hitch of left side to be connected with third one-way throttle valve and third accumulator in turn and make third
The epicoele of accumulator and corresponding hydro-pneumatic spring connects, and makes in all left side draft hitch of rear axle group hydro-pneumatic spring corresponding the
The arrival end of three accumulators homogeneously connects；The cavity of resorption of hydro-pneumatic spring is connected in turn in all right side draft hitch of rear axle group
4th one-way throttle valve and the 4th accumulator simultaneously connect the 4th accumulator with the epicoele of corresponding hydro-pneumatic spring, and make rear axle group
The arrival end of corresponding 4th accumulator of hydro-pneumatic spring homogeneously connects in all right side draft hitch.
A kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle of the invention compared with prior art, has
Following advantages: the present invention allows hydraulic power unit to specifically include oil inlet by setting hydraulic power unit and lifting pilot unit
Pipe, oil return pipe, oil distributing pipe, and the first branch oil pipe, the second branch oil pipe, the third branch oil pipe and the 4th that are connect respectively with oil distributing pipe
Branch oil pipe allows one end of oil inlet pipe and oil return pipe to connect respectively with oil distributing pipe, and the other end of oil inlet pipe and oil return pipe is allowed to use
When connect with oil sources.Meanwhile lifting pilot unit being allowed to be made of the draft hitch in all vehicle bridge, wherein draft hitch specifically wraps
Include Top Crossbeam, lower cross arm and hydro-pneumatic spring, make the inner end of Top Crossbeam and lower cross arm corresponding by the first pin shaft and the second pin shaft with
Vehicle frame is hinged, allows the outer end of Top Crossbeam and lower cross arm the first flexural pivot of corresponding installation and the second flexural pivot, allows the first flexural pivot and the second ball
Hinge connect with wheel group respectively, allows the upper end of hydro-pneumatic spring to pass through the first oscillating bearing hinged with vehicle frame, allows the lower end of hydro-pneumatic spring
It is hinged by second joint bearing and lower cross arm.And all vehicle bridge is allowed to be divided into the preceding bridge group being made of m vehicle bridge and by n vehicle bridge
The rear axle group of composition, the hydro-pneumatic spring epicoele of all left side draft hitch of bridge group is connect respectively and in oil with the first branch oil pipe before allowing
The first solenoid directional control valve is set on the first branch oil pipe between gas spring and oil distributing pipe, all right side draft hitch of bridge group before allowing
Hydro-pneumatic spring epicoele connect with the second branch oil pipe respectively and is arranged on the second branch oil pipe between hydro-pneumatic spring and oil distributing pipe
Two solenoid directional control valves allow the hydro-pneumatic spring epicoele of all left side draft hitch of rear axle group to connect respectively with third branch oil pipe and in oil
Third solenoid directional control valve is set on the third branch oil pipe between gas spring and oil distributing pipe, allows all right side draft hitch of rear axle group
Hydro-pneumatic spring epicoele connect with the 4th branch oil pipe respectively and is arranged on the 4th branch oil pipe between hydro-pneumatic spring and oil distributing pipe
Four solenoid directional control valves.And the 5th solenoid directional control valve is set on oil inlet pipe, the 6th solenoid directional control valve is set on oil return pipe, wherein
M >=1, n >=1.Thus just constitute a kind of structure is simple, implement to be easy, control flexibly, that stroke is turned up is big, applied widely
The big stroke adjustment system of bodywork height for multi-axle heavy type vehicle.In practical applications, the present invention is on the basis of hydro pneumatic suspension
On by adding a set of independent oil sources and hydraulic system, and the hydro-pneumatic spring before allowing on the left of bridge group is mutual by the first branch oil pipe
Connection, the hydro-pneumatic spring before allowing on the right side of bridge group are interconnected by the second branch oil pipe, and the hydro-pneumatic spring on the left of rear axle group is allowed to pass through
Third branch oil pipe is interconnected, and makes the hydro-pneumatic spring on the right side of rear axle group interconnected by the 4th branch oil pipe, just constitute it is left front,
Four-point supporting system before the right side, behind the left back and right side.The structure design of this simplified supporting point is more easier control, and can be effective
Improve the synchronism that vehicle body is turned up.Meanwhile the present invention is by carrying out hard spot coordinate to the draft hitch as lifting pilot unit
Optimization design, and by using the first flexural pivot and the second flexural pivot of polarizers of big angle scope, realize the big stroke adjustment of bodywork height
Purpose.Show vehicle body can be down to vehicle frame using the present invention through practical application to land state, the spies such as railway transportation can be fully met
The requirement of different operating condition.In addition, the present invention is by allowing the first branch oil pipe, the second branch oil pipe, third branch oil pipe and the 4th branch oil pipe to divide
It is not connect with oil distributing pipe, oil distributing pipe is allowed to connect respectively with oil inlet pipe and oil return pipe, and electromagnetic switch is set on respective pipeline
Valve is controlled, and the first branch oil pipe, the second branch oil pipe, third branch oil pipe and the 4th branch oil pipe while playing is made to send oil and oil return
Effect, simplifies structure, and it is more easy to make to implement and control.
Shown specific embodiment is big to a kind of bodywork height for multi-axle heavy type vehicle of the invention with reference to the accompanying drawing
Stroke adjustment system is described in further detail:
Detailed description of the invention
Fig. 1 is hydraulic power unit in a kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle of the invention
Schematic diagram；
Fig. 2 is single draft hitch in a kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle of the invention
Schematic diagram；
Fig. 3 is single draft hitch in a kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle of the invention
With the connection relationship diagram of vehicle frame.
Specific embodiment
The tool of the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle of the present invention as shown in Figure 1 to Figure 3
Body embodiment, including hydraulic power unit and lifting pilot unit.Hydraulic power unit specifically includes oil inlet pipe 1, oil return pipe
2, oil distributing pipe 3, and the first branch oil pipe 4, the second branch oil pipe 5, third branch oil pipe 6 and the 4th that are connect respectively with oil distributing pipe 3
Oil pipe 7.It allows one end of oil inlet pipe 1 and oil return pipe 2 to connect respectively with oil distributing pipe 3, oil inlet pipe 1 and the other end of oil return pipe 2 is allowed to exist
It is connect in use with oil sources, and fuel circulating pump is set in oil sources side.Allow lifting pilot unit by the draft hitch group in all vehicle bridge
At single draft hitch specifically includes Top Crossbeam 8, lower cross arm 9 and hydro-pneumatic spring 10.Allow the inner end pair of Top Crossbeam 8 and lower cross arm 9
Should be hinged with vehicle frame by the first pin shaft 81 and the second pin shaft 91, allow the outer end of Top Crossbeam 8 and lower cross arm 9 is corresponding first ball is installed
Hinge 82 and the second flexural pivot 92, and it connect the first flexural pivot 82 and the second flexural pivot 92 with wheel group respectively.Allow the upper end of hydro-pneumatic spring 10
It is hinged with vehicle frame by the first oscillating bearing 101, allow the lower end of hydro-pneumatic spring 10 to pass through second joint bearing 102 and lower cross arm 9
Hingedly.Meanwhile all vehicle bridge being allowed to be divided into the preceding bridge group being made of m vehicle bridge and the rear axle group being made of n vehicle bridge, wherein m >=
1, n >=1.And before allowing the epicoele of the hydro-pneumatic spring 10 of all left side draft hitch of bridge group connect respectively with the first branch oil pipe 4 and
First solenoid directional control valve 41 is set on the first branch oil pipe 4 between hydro-pneumatic spring 10 and oil distributing pipe 3, all right sides of bridge group are outstanding before allowing
The epicoele of the hydro-pneumatic spring 10 of rack device is connect with the second branch oil pipe 5 and between hydro-pneumatic spring 10 and oil distributing pipe 3 respectively
Second solenoid directional control valve 51 is set on two branch oil pipes 5, the epicoele of the hydro-pneumatic spring 10 of all left side draft hitch of rear axle group is allowed to divide
It is not connect with third branch oil pipe 6 and third electromagnetic switch is set on the third branch oil pipe 6 between hydro-pneumatic spring 10 and oil distributing pipe 3
Valve 61 allows the epicoele of the hydro-pneumatic spring 10 of all right side draft hitch of rear axle group to connect and with the 4th branch oil pipe 7 in oil gas respectively
4th solenoid directional control valve 71 is set on the 4th branch oil pipe 7 between spring 10 and oil distributing pipe 3.And the 5th is arranged on oil inlet pipe 1
The 6th solenoid directional control valve 21 is arranged in solenoid directional control valve 11 on oil return pipe 2.It should be noted that only denoting 6 in attached drawing 1
Vehicle bridge, wherein before bridge group include two vehicle bridge, i.e. m=2, rear axle group includes four vehicle bridge, i.e. n=4, but in practical applications simultaneously
6 vehicle bridge are not limited to, as long as meeting 2 vehicle bridge or more, and the preceding bridge group vehicle bridge number that includes and rear axle group include
Vehicle bridge number can be configured according to specific vehicle bridge situation and actual needs, as long as preceding bridge group and rear axle group contain at least one
The object of the invention can be achieved in vehicle bridge, i.e. m >=1, n >=1.
Be arranged through the above structure just constitute a kind of structure is simple, implement to be easy, control flexibly, that stroke is turned up is big, suitable
With the wide big stroke adjustment system of the bodywork height for multi-axle heavy type vehicle of range.In practical applications, the present invention is in oil gas
By adding a set of independent oil sources and hydraulic system on the basis of suspension, and the hydro-pneumatic spring 10 before allowing on the left of bridge group passes through the
One branch oil pipe 4 is interconnected, and the hydro-pneumatic spring 10 before allowing on the right side of bridge group is interconnected by the second branch oil pipe 5, makes rear axle group left
The hydro-pneumatic spring 10 of side is interconnected by third branch oil pipe 6, and the hydro-pneumatic spring 10 on the right side of rear axle group is allowed to pass through the 4th branch oil pipe 7
It is interconnected, just constitutes the four-point supporting system of front left, front right, rear left and right.The structure of this simplified supporting point designs
It is more easier control, and the synchronism of vehicle body height-regulating can be effectively improved.Meanwhile the present invention passes through to as lifting pilot unit
Draft hitch carry out the design of hard spot coordinate optimizing, and by using the first flexural pivot 82 and the second flexural pivot 92 of polarizers of big angle scope,
Realize the purpose of the big stroke adjustment of bodywork height.Show that vehicle body can be down to vehicle frame using the present invention lands through practical application
State can fully meet the requirement that the special operation conditions such as railway transportation vehicle body are turned up big stroke.In addition, the present invention is by allowing first
Branch oil pipe 4, the second branch oil pipe 5, third branch oil pipe 6 and the 4th branch oil pipe 7 are connect with oil distributing pipe 3 respectively, allow oil distributing pipe 3 respectively with
Oil inlet pipe 1 and oil return pipe 2 connect, and solenoid directional control valve is arranged on respective pipeline and is controlled, and make the first branch oil pipe 4, the
Two branch oil pipes 5, third branch oil pipe 6 and the 4th branch oil pipe 7 play the role of sending oil and oil return simultaneously, simplify structure, make to implement
It is more easy with controlling.Carrying out bodywork height adjusting using the present invention, detailed process is as follows: when that need to increase vehicle body, passing through control
System processed allow the 5th solenoid directional control valve 11, the 6th solenoid directional control valve 21, the first solenoid directional control valve 41, the second solenoid directional control valve 51,
Third solenoid directional control valve 61 and the 4th solenoid directional control valve 71 are in forward conduction state, and oil sources leads to hydraulic oil by fuel circulating pump
It crosses oil inlet pipe 1 and is delivered to oil distributing pipe 3, and pass through the first branch oil pipe 4, the second branch oil pipe 5, third branch oil pipe 6 and the 4th branch oil pipe 7
Hydro-pneumatic spring 10, the hydro-pneumatic spring 10 on the right side of preceding bridge group, 10 and of hydro-pneumatic spring on the left of rear axle group before corresponding on the left of bridge group
Hydro-pneumatic spring 10 on the right side of rear axle group is oil-filled, to realize the raised purpose of vehicle body, and makes to send when reaching vehicle body raising and requiring
Oil pump stops.It when vehicle body need to be reduced, then allows the 5th solenoid directional control valve 11 to be in forward conduction state by control system, and allows
6th solenoid directional control valve 21, the first solenoid directional control valve 41, the second solenoid directional control valve 51, third solenoid directional control valve 61 and the 4th electromagnetism
Reversal valve 71 is in reverse-conducting state, and stops fuel circulating pump, on the right side of the hydro-pneumatic spring 10, preceding bridge group on the left of preceding bridge group
The effect that the hydro-pneumatic spring 10 on the right side of hydro-pneumatic spring 10 and rear axle group on the left of hydro-pneumatic spring 10, rear axle group is pushed in vehicle body gravity
Under, keep hydraulic oil therein corresponding by the first branch oil pipe 4, the second branch oil pipe 5, third branch oil pipe 6 and the reflux of the 4th branch oil pipe 7
Oil sources is flowed back into oil distributing pipe 3, and by oil return pipe 2, to realize the purpose that vehicle body reduces, and is lowered the requirement reaching vehicle body
When so that the 6th solenoid directional control valve 21 is converted to forward conduction state.During above-mentioned vehicle body is raised and lowered, it can also lead to
The first solenoid directional control valve 41, the second solenoid directional control valve 51, third solenoid directional control valve 61 or the 4th solenoid directional control valve 71 is crossed to control respectively
The on and off of the first branch oil pipe 4, the second branch oil pipe 5, third branch oil pipe 6 or the 4th branch oil pipe 7 is made, to realize the part liter of vehicle body
Drop has the advantages that control is flexible, adaptable.
As prioritization scheme, first oil of the present embodiment between the first solenoid directional control valve 41 and oil distributing pipe 3
It is provided with the first proportional flow control valve 42 on pipe 4, is set on the second branch oil pipe 5 between the second solenoid directional control valve 51 and oil distributing pipe 3
The second proportional flow control valve 52 has been set, third is provided on the third branch oil pipe 6 between third solenoid directional control valve 61 and oil distributing pipe 3
Proportional flow control valve 62 is provided with the 4th proportional flow on the 4th branch oil pipe 7 between the 4th solenoid directional control valve 71 and oil distributing pipe 3
Valve 72.This structure setting passes through the first proportional flow control valve 42, the second proportional flow control valve 52, third proportional flow control valve 62 and
Four proportional flow control valves 72 can correspond in the first branch oil pipe 4 of control, the second branch oil pipe 5, third branch oil pipe 6 and the 4th branch oil pipe 7
Hydraulic fluid flow rate, to realize the purpose of control vehicle body lifting speed.When needing fast lifting integral body or certain part, lead to
Its hydraulic fluid flow rate can be increased to the biggish current signal of corresponding proportional flow control valve input by crossing control system；It is on the contrary then give phase
The proportional flow control valve answered inputs lesser current signal；And the first proportional flow control valve 42, the second ratio stream are inputed to by control
The current signal for measuring valve 52, third proportional flow control valve 62 and the 4th proportional flow control valve 72, can effectively protect in vehicle body integral elevating
Synchronism before demonstrate,proving on the left of bridge group, on the right side of preceding bridge group, on the left of rear axle group and on the right side of rear axle group between four supporting points.Meanwhile this
Specific embodiment is provided in line check valve 12 on the oil inlet pipe 1 between the 5th solenoid directional control valve 11 and oil distributing pipe 3.It is returning
It is provided with overflow pipe 22 between oil pipe 2 and oil inlet pipe 1, and is provided with proportional pressure control valve 23 on overflow pipe 22, and allow overflow pipe
22 and the tie point of oil inlet pipe 1 be between the 5th solenoid directional control valve 11 and in line check valve 12, allow overflow pipe 22 and oil return pipe 2
Tie point be in side of the 6th solenoid directional control valve 21 relative to oil sources.By the way that in line check valve 12 is arranged, vehicle body is being increased
When can guarantee that the hydraulic oil of oil sources conveying only reaches and can just fill out in line check valve 12 after required pressure, and be each vehicle bridge
Hydro-pneumatic spring 10 is oil-filled, can enhance the stability of vehicle body elevation process.By setting overflow pipe 22 and proportional pressure control valve 23, can have
The maximum pressure of effect control oil sources output, when needing oil sources to export higher pressure, by the control electricity for improving proportional pressure control valve
Purpose can be realized to improve its conducting hydraulic pressure value in stream, and when needing to reduce the pressure of oil sources output, then pass through reduction ratio
Hydraulic pressure value is connected to reduce it in the control electric current of overflow valve.Have the advantages that easy to control flexible, applied widely.
As prioritization scheme, present embodiment the first solenoid directional control valve 41 and apart from nearest hydro-pneumatic spring 10 it
Between the first branch oil pipe 4 on be provided with first pressure sensor 43；In the second solenoid directional control valve 51 and apart from nearest oil gas bullet
Second pressure sensor 53 is provided on the second branch oil pipe 5 between spring 10；In third solenoid directional control valve 61 and apart from nearest
Third pressure sensor 63 is provided on third branch oil pipe 6 between hydro-pneumatic spring 10；In the 4th solenoid directional control valve 71 and distance
The 4th pressure sensor 73 is provided on the 4th branch oil pipe 7 between nearest hydro-pneumatic spring 10；In the 5th solenoid directional control valve 11
The 5th pressure sensor 13 is provided on oil inlet pipe 1 between in line check valve 12.Pass through first pressure sensor 43, second
Pressure sensor 53, third pressure sensor 63, the 4th pressure sensor 73 and the 5th pressure sensor 13, went up and down in vehicle body
Cheng Zhongke effectively detects the pressure in corresponding pipeline, is transferred to control system by each pressure signal that will test, can be improved
The accuracy and safety of vehicle body lifting.Meanwhile when increasing vehicle body for convenient for high fine-tuning, the first branch oil pipe 4, second of guarantee
Pressure in branch oil pipe 5, third branch oil pipe 6 and the 4th branch oil pipe 7, present embodiment the first solenoid directional control valve 41 and away from
From on the first branch oil pipe 4 between nearest hydro-pneumatic spring 10 be provided with the first external oil-filled check valve 44；It is changed in the second electromagnetism
The second external oil-filled check valve 54 is provided on the second branch oil pipe 5 to valve 51 and between nearest hydro-pneumatic spring 10；?
The external oil-filled list of third is provided on third solenoid directional control valve 61 and third branch oil pipe 6 between nearest hydro-pneumatic spring 10
To valve 64；The 4th is provided on the 4th solenoid directional control valve 71 and the 4th branch oil pipe 7 between nearest hydro-pneumatic spring 10
External oil-filled check valve 74 makes vehicle body keep stable state in order to external oil-filled for each branch oil pipe.In addition, to avoid oil
Source, which is reduced, influences output pressure, oil inlet pipe 1 of the present embodiment also in the 5th solenoid directional control valve 11 relative to oil sources side
It is upper to be provided with the 5th external oil-filled check valve 14, in order to external oil-filled.
As the scheme that advanced optimizes, present embodiment is external oil-filled unidirectional in the 5th solenoid directional control valve 11 and the 5th
Shut-off valve 15 and bidirectional high-pressure filter 16 are also provided on oil inlet pipe 1 between valve 14.It can further be mentioned by shut-off valve 15
The stability of high hydraulic power unit can avoid impurity by bidirectional high-pressure filter 16 and enter each control valve and hydro-pneumatic spring,
It ensure that its working performance.For convenient for individually controlling on the left of preceding bridge group, on the right side of preceding bridge group, on the left of rear axle group and in preceding bridge group right side
Each single draft hitch do not have a gas spring 10, this tool present embodiment is in the adjacent oil gas of all left side draft hitch of preceding bridge group
It is provided with the 7th solenoid directional control valve 45 on the first branch oil pipe 4 between spring 10, in all right side draft hitch phases of preceding bridge group
It is provided with the 8th solenoid directional control valve 55 on the second branch oil pipe 5 between adjacent hydro-pneumatic spring 10, in all left side suspensions of rear axle group
It is provided with the 9th solenoid directional control valve 65 on third branch oil pipe 6 between the adjacent hydro-pneumatic spring 10 of device, on all right sides of rear axle group
The tenth solenoid directional control valve 75 is provided on the 4th branch oil pipe 7 between the adjacent hydro-pneumatic spring 10 of side draft hitch.In addition, this tool
The cavity of resorption of hydro-pneumatic spring 10 is sequentially connected the first one-way throttle in all left side draft hitch of bridge group before body embodiment also allows
Valve 46 and the first accumulator 47 connect the first accumulator 47 with the epicoele of corresponding hydro-pneumatic spring 10, and keep preceding bridge group all
The arrival end of corresponding first accumulator 47 of hydro-pneumatic spring 10 homogeneously connects in the draft hitch of left side.All right sides of bridge group before allowing
The cavity of resorption of hydro-pneumatic spring 10 is sequentially connected the second one-way throttle valve 56 and the second accumulator 57 and makes the second storage in draft hitch
Energy device 57 is connected with the epicoele of corresponding hydro-pneumatic spring 10, and keeps hydro-pneumatic spring 10 in all right side draft hitch of preceding bridge group corresponding
The arrival end of the second accumulator 57 homogeneously connect.Make the cavity of resorption of hydro-pneumatic spring 10 in all left side draft hitch of rear axle group equal
It is sequentially connected third one-way throttle valve 66 and third accumulator 67 and makes the upper of third accumulator 67 and corresponding hydro-pneumatic spring 10
Chamber connection, and make the arrival end of the corresponding third accumulator 67 of hydro-pneumatic spring 10 in all left side draft hitch of rear axle group mutually
Connection.The cavity of resorption of hydro-pneumatic spring 10 in all right side draft hitch of rear axle group is allowed to be sequentially connected the 4th one-way throttle valve 76 and
Four accumulators 77 simultaneously connect the 4th accumulator 77 with the epicoele of corresponding hydro-pneumatic spring 10, and make all right side suspensions of rear axle group
The arrival end of corresponding 4th accumulator 77 of hydro-pneumatic spring 10 homogeneously connects in device.This structure setting can make preceding bridge group institute
There are the left side hydro-pneumatic spring 10 of draft hitch, the hydro-pneumatic spring 10 of all right side draft hitch of preceding bridge group, all left sides of rear axle group
The equal pressure maintaining dynamic balance of hydro-pneumatic spring 10 of all right side draft hitch of hydro-pneumatic spring 10 and rear axle group of draft hitch, to avoid portion
The hanging phenomenon of minute wheel group, and elastic force is provided to draft hitch by accumulator, effective buffer function can be played, is improved
The passability and stability of vehicle.It should be noted that for the adjusting convenient for accurately controlling bodywork height, the present invention is actually being answered
In also in hydro-pneumatic spring built-in displacement sensor, believed by the displacement that displacement sensor can acquire hydro-pneumatic spring in real time
Number, accurate control purpose can be realized by the way that the displacement signal of hydro-pneumatic spring is transferred to control system.
Above embodiments are only the descriptions carried out to the preferred embodiment for the present invention, and range not is claimed to the present invention
The restriction of progress, without departing from the spirit of the design of the present invention, the technology of this field engineers and technicians according to the present invention
The various forms of deformations that scheme is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (7)
1. a kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle, including hydraulic power unit and lifting guiding
Unit, which is characterized in that the hydraulic power unit includes oil inlet pipe (1), oil return pipe (2), oil distributing pipe (3), and respectively with
The first branch oil pipe (4), the second branch oil pipe (5), third branch oil pipe (6) and the 4th branch oil pipe (7) of oil distributing pipe (3) connection, it is described
One end of oil inlet pipe (1) and oil return pipe (2) is connect with oil distributing pipe (3) respectively, and the other end of oil inlet pipe (1) and oil return pipe (2) is used
It is connect in oil sources；The lifting pilot unit is made of the draft hitch in all vehicle bridge, and draft hitch includes Top Crossbeam
(8), lower cross arm (9) and hydro-pneumatic spring (10), Top Crossbeam (8) it is corresponding with the inner end of lower cross arm (9) by the first pin shaft (81) and
Second pin shaft (91) and vehicle frame are hinged, and Top Crossbeam (8) is corresponding with the outer end of lower cross arm (9) to be equipped with the first flexural pivot (82) and second
Flexural pivot (92), the first flexural pivot (82) and the second flexural pivot (92) are connect with wheel group respectively, and the upper end of hydro-pneumatic spring (10) passes through first
Oscillating bearing (101) and vehicle frame are hinged, and the lower end of hydro-pneumatic spring (10) is cut with scissors by second joint bearing (102) and lower cross arm (9)
It connects；All vehicle bridge are divided into the preceding bridge group being made of m vehicle bridge and the rear axle group being made of n vehicle bridge, and preceding all left sides of bridge group are outstanding
Hydro-pneumatic spring (10) epicoele of rack device connect respectively with the first branch oil pipe (4) and hydro-pneumatic spring (10) and oil distributing pipe (3) it
Between the first branch oil pipe (4) be equipped with the first solenoid directional control valve (41), the hydro-pneumatic spring of preceding all right side draft hitch of bridge group
(10) epicoele is connect with the second branch oil pipe (5) and the second branch oil pipe (5) between hydro-pneumatic spring (10) and oil distributing pipe (3) respectively
Be equipped with the second solenoid directional control valve (51), hydro-pneumatic spring (10) epicoele of all left side draft hitch of rear axle group respectively with third branch
Third solenoid directional control valve is equipped on oil pipe (6) connection and the third branch oil pipe (6) between hydro-pneumatic spring (10) and oil distributing pipe (3)
(61), hydro-pneumatic spring (10) epicoele of all right side draft hitch of rear axle group is connect and with the 4th branch oil pipe (7) in oil gas respectively
The 4th branch oil pipe (7) between spring (10) and oil distributing pipe (3) is equipped with the 4th solenoid directional control valve (71), and oil inlet pipe is set on (1)
There is the 5th solenoid directional control valve (11), oil return pipe (2) is equipped with the 6th solenoid directional control valve (21), wherein m >=1, n >=1.
2. the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle described in accordance with the claim 1, feature
It is, the first branch oil pipe (4) between first solenoid directional control valve (41) and oil distributing pipe (3) is equipped with the first proportional flow control valve
(42), the second branch oil pipe (5) between the second solenoid directional control valve (51) and oil distributing pipe (3) is equipped with the second proportional flow control valve
(52), the third branch oil pipe (6) between third solenoid directional control valve (61) and oil distributing pipe (3) is equipped with third proportional flow control valve
(62), the 4th branch oil pipe (7) between the 4th solenoid directional control valve (71) and oil distributing pipe (3) is equipped with the 4th proportional flow control valve
(72)。
3. the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle according to claim 2, feature
It is, the oil inlet pipe (1) between the 5th solenoid directional control valve (11) and oil distributing pipe (3) is equipped in line check valve (12)；Institute
It states and is equipped with overflow pipe (22) between oil return pipe (2) and oil inlet pipe (1), overflow pipe (22) is equipped with proportional pressure control valve (23), overflow
The tie point for managing (22) and oil inlet pipe (1) is between the 5th solenoid directional control valve (11) and in line check valve (12), overflow pipe
(22) side of the 6th solenoid directional control valve (21) relative to oil sources is in the tie point of oil return pipe (2).
4. the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle described in accordance with the claim 3, feature
It is, first solenoid directional control valve (41) and the first branch oil pipe (4) between nearest hydro-pneumatic spring (10) are equipped with
First pressure sensor (43)；Second solenoid directional control valve (51) and the second branch oil pipe between nearest hydro-pneumatic spring (10)
(5) second pressure sensor (53) are equipped with；Third solenoid directional control valve (61) and between nearest hydro-pneumatic spring (10)
Third branch oil pipe (6) is equipped with third pressure sensor (63)；4th solenoid directional control valve (71) and apart from nearest hydro-pneumatic spring
(10) the 4th branch oil pipe (7) between is equipped with the 4th pressure sensor (73)；5th solenoid directional control valve (11) and oil inlet are unidirectional
Oil inlet pipe (1) between valve (12) is equipped with the 5th pressure sensor (13).
5. the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle according to claim 4, feature
It is, first solenoid directional control valve (41) and the first branch oil pipe (4) between nearest hydro-pneumatic spring (10) are equipped with
First external oil-filled check valve (44)；Second solenoid directional control valve (51) and second between nearest hydro-pneumatic spring (10)
Oil pipe (5) is equipped with the second external oil-filled check valve (54)；Third solenoid directional control valve (61) and apart from nearest hydro-pneumatic spring
(10) the third branch oil pipe (6) between is equipped with the external oil-filled check valve (64) of third；4th solenoid directional control valve (71) and distance
The 4th branch oil pipe (7) between nearest hydro-pneumatic spring (10) is equipped with the 4th external oil-filled check valve (74)；5th electromagnetism changes
Oil inlet pipe (1) to valve (11) relative to oil sources side is equipped with the 5th external oil-filled check valve (14).
6. the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle according to claim 5, feature
It is, is additionally provided with and cuts on the oil inlet pipe (1) between the 5th solenoid directional control valve (11) and the 5th external oil-filled check valve (14)
Only valve (15) and bidirectional high-pressure filter (16).
7. the big stroke adjustment system of a kind of bodywork height for multi-axle heavy type vehicle according to claim 5, feature
It is, the cavity of resorption of hydro-pneumatic spring (10) is connected with the first one-way throttle valve in turn in preceding all left side draft hitch of bridge group
(46) and the first accumulator (47) and the epicoele of the first accumulator (47) and corresponding hydro-pneumatic spring (10) is connected, and makes preceding bridge
The arrival end of corresponding first accumulator (47) of hydro-pneumatic spring (10) homogeneously connects in all left side draft hitch of group；Preceding bridge group
The cavity of resorption of hydro-pneumatic spring (10) is connected with the second one-way throttle valve (56) and the second accumulation of energy in turn in all right side draft hitch
Device (57) connects the second accumulator (57) with the epicoele of corresponding hydro-pneumatic spring (10), and makes all right side suspensions of preceding bridge group
The arrival end of corresponding second accumulator (57) of hydro-pneumatic spring (10) homogeneously connects in device；All left side suspension dresses of rear axle group
The cavity of resorption for setting middle hydro-pneumatic spring (10) is connected with third one-way throttle valve (66) and third accumulator (67) in turn and makes third
Accumulator (67) is connected with the epicoele of corresponding hydro-pneumatic spring (10), and makes hydro-pneumatic spring in all left side draft hitch of rear axle group
(10) arrival end of corresponding third accumulator (67) homogeneously connects；Hydro-pneumatic spring in all right side draft hitch of rear axle group
(10) cavity of resorption be connected with the 4th one-way throttle valve (76) and the 4th accumulator (77) in turn and make the 4th accumulator (77) with
The epicoele of corresponding hydro-pneumatic spring (10) connects, and makes in all right side draft hitch of rear axle group hydro-pneumatic spring (10) corresponding the
The arrival end of four accumulators (77) homogeneously connects.
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| CN201710303011.0A CN107116986B (en) | 2017-05-03 | 2017-05-03 | A kind of big stroke adjustment system of bodywork height for multi-axle heavy type vehicle |
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| CN107116986B true CN107116986B (en) | 2019-08-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107150564B (en) * | 2017-05-02 | 2019-10-11 | 北京航天发射技术研究所 | A kind of overall height adjustment control method and device for multi-axle heavy type vehicle |
| CN107914536A (en) * | 2017-11-22 | 2018-04-17 | 北京航天发射技术研究所 | The spacing hydro-pneumatic spring in the two poles of the earth and use its suspension hydraulic system |
| CN112009193B (en) * | 2020-09-11 | 2022-05-31 | 泰安航天特种车有限公司 | Anti adjustable oil gas suspension hydraulic system that heels |
| CN114132132A (en) * | 2021-12-06 | 2022-03-04 | 浙江吉利控股集团有限公司 | Suspension height control system and method and vehicle |
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| CN102700379A (en) * | 2012-06-07 | 2012-10-03 | 中国北方车辆研究所 | Connection hydraulic lock combination device for hydro pneumatic suspension vehicle attitude regulating system |
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| JP2015105014A (en) * | 2013-11-29 | 2015-06-08 | アイシン精機株式会社 | Vehicle height adjustment device |
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| CN102700379A (en) * | 2012-06-07 | 2012-10-03 | 中国北方车辆研究所 | Connection hydraulic lock combination device for hydro pneumatic suspension vehicle attitude regulating system |
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