CN110194038A - A kind of trailer/semitrailer hydro pneumatic suspension device - Google Patents
A kind of trailer/semitrailer hydro pneumatic suspension device Download PDFInfo
- Publication number
- CN110194038A CN110194038A CN201910492430.2A CN201910492430A CN110194038A CN 110194038 A CN110194038 A CN 110194038A CN 201910492430 A CN201910492430 A CN 201910492430A CN 110194038 A CN110194038 A CN 110194038A
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- Prior art keywords
- hydro
- pneumatic
- spring
- trailer
- cylinder barrel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
- B60G11/34—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs
- B60G11/46—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also fluid springs
-
- 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
- B60G17/052—Pneumatic spring characteristics
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses a kind of trailer/semitrailer hydro pneumatic suspension devices, the upper trunnion of hydro-pneumatic spring cylinder and lower trunnion pass through bolt and are pivotally connected, and the both ends of pivot are provided with protrusion, protrude through the through-hole setting of U-type groove, one U-type groove is fixed on vehicle frame, and a U-type groove and leaf spring are integrally formed；The interlude of leaf spring is fixed on axle by U-bolt and axle bed, and U-bolt passes through axle bed by nut check from bottom to top, and axle is located at the top of leaf spring.Trailer of the present invention/semitrailer hydro pneumatic suspension device substitution leaf spring or air spring, apply on trailer or semi-mounted carrier, pass through the setting of hydro-pneumatic spring cylinder and leaf spring, hydro-pneumatic spring cylinder and the connection structure of vehicle frame and leaf spring are compact, and axle is set to the top of leaf spring, it ensure that the transmission of active force between vehicle frame and wheel, hydro-pneumatic spring cylinder makes trailer/semitrailer unloaded or good buffering effect can be achieved in full load, realizes vehicle driving stationarity.
Description
Technical field
The present invention relates to the suspension system of trailer and semi-mounted carrier, especially a kind of trailer/semitrailer hydro pneumatic suspension
Device.
Background technique
Present automobile is designed with suspension system, and suspension is the vehicle frame and vehicle bridge of automobile, all between axle or wheel
The general name of force transmission connections, the main function of suspension are a shear force and the torque that transmitting acts between wheel and vehicle body, than
Such as support force, brake force and driving force, and mitigation is transmitted to caused by the shock loading of vehicle body, decaying thus by uneven road surface
Vibration mitigates bad road to the impact force of vehicle, comfort that is steady, guaranteeing occupant, reduction cargo and the vehicle of guarantee vehicle
Dynamic loading itself.
The two electrical connection is got up by suspension system between trailer/semitrailer axle and vehicle frame, at present trailer and
There are commonly plate spring suspension brackets and air suspension, plate spring suspension brackets, because the rigidity of elastic element is big for the suspension system of semi-mounted carrier
It is mostly linear, and it is held essentially constant its rigidity, even if being imitated using measures such as Varying-thickness, major-minor steel plates to the improvement of performance
Fruit is not also significant, and air suspension has unit energy storage compared with small, structure size is big, structure is complicated, components type is more, angle of heel
The deficiencies such as rigidity is low.
Also having the hydro pneumatic suspension in vehicle at present is using hydro-pneumatic spring as elastic element, but the prior art is using oil
It to the adjusting of height of car is realized by the way of being filled with hydraulic oil into hydro-pneumatic spring in the vehicle of gas spring, passed through
The blowing pressure adjusts rigidity, but buffering is too short when the variation range of effective rigidity is all less than normal or rigidity is big, and lengthens oil gas bullet
The stroke of spring cylinder is limited in space again.As heavy-duty vehicle with hydro-pneumatic spring cylinder unloaded and full load required one it is good
Cushion stroke, have buffering effect when such as unloaded, full load buffering effect is then poor；Change starting rigidity by the blowing pressure, protects
Full load good buffer effect is demonstrate,proved, and rigidity is too big when zero load, buffering effect is deteriorated, and increases limit of the stroke by height of car
System.
Therefore, it is necessary to a trailer/semitrailer hydro pneumatic suspension device be designed, so that trailer/semitrailer is unloaded or full
Preferable cruising characteristic may be implemented when load, obtain good buffering effect.
Summary of the invention
The object of the present invention is to provide a kind of trailer/semitrailer hydro pneumatic suspension devices, and it is empty to solve current trailer/semitrailer
Load or full load, can only realize the good buffering effect under a certain state, can not can be achieved when the two state switches
The problem of preferable buffering effect.
The technical scheme adopted by the invention is that:
A kind of trailer/semitrailer hydro pneumatic suspension device, including flat spring bracket, leaf spring and hydro-pneumatic spring cylinder, the leaf spring branch
Frame is fixed on vehicle frame, and one end of the leaf spring is bolted mode and fixes with flat spring bracket, the other end of the leaf spring
It is connect with the lower trunnion of hydro-pneumatic spring cylinder, it is characterised in that:
The other end of the leaf spring is a U-type groove, and the U-type groove both ends are equipped with through-hole, the lower ear of the hydro-pneumatic spring cylinder
Axis is by bolt and is pivotally connected, and the both ends of the pivot are provided with protrusion, described to protrude through through-hole setting；
The upper trunnion of the hydro-pneumatic spring cylinder is connect with upper bracket, and the upper bracket is fixed on vehicle frame, the upper bracket
For a U-type groove, the U-type groove both ends are equipped with through-hole, and the upper trunnion of the hydro-pneumatic spring cylinder by bolt and is pivotally connected, described
The both ends of pivot are provided with protrusion, described to protrude through through-hole setting；
The interlude of the leaf spring is fixed on axle by U-bolt and axle bed, and the U-bolt passes through from bottom to top
Axle bed is located at the top of leaf spring by nut check, the axle.
Further, the leaf spring is L-type.
Further, the hydro-pneumatic spring cylinder includes upper hydro-pneumatic spring and lower hydro-pneumatic spring, and the upper hydro-pneumatic spring is under
Hydro-pneumatic spring be upper and lower serial mechanism setting, the upper hydro-pneumatic spring include upper cylinder barrel, upper piston rod, upper piston, guide sleeve and
Rear cover, the lower hydro-pneumatic spring include lower cylinder barrel, lower piston rod, lower piston and rear end cap,
Wherein, the upper piston rod and upper piston are nested in cylinder barrel, and the lower piston rod and lower piston are nested in down
In cylinder barrel, the upper piston rod is internally provided with cavity, and the outer diameter of the lower piston rod is less than the internal diameter of cavity, the lower work
Stopper rod is nested in cavity, and the lower piston rod is moved back and forth along cavity；
The upper end of the upper cylinder barrel is provided with guide sleeve, and the guide sleeve is bolted to connection with upper cylinder barrel, described
The lower end of upper cylinder barrel is provided with rear cover, and the rear cover and upper cylinder barrel are integrally formed；
The upper end of the lower cylinder barrel is bolted to connection with rear cover, and the lower end of the lower cylinder barrel and rear end cap pass through spiral shell
Bolt is fixedly connected；
The bottom end of the upper piston and the top of rear end cap abut against, and the lower end surface of the lower piston and rear end cap offsets
It connects；
Between the upper piston rod, upper piston, guide sleeve and upper cylinder barrel formed A chamber, the lower piston rod, upper piston with it is upper
The first oil pocket is formed between cylinder barrel, is formed B chamber between the lower piston and lower cylinder barrel, is formed between the lower piston and rear end cap
Second oil pocket；The upper cylinder barrel top side is provided with A chamber interface, and the rear end cap side is provided with B chamber interface；
The A chamber passes through at least one check valve respectively and at least one damping hole is connected to the first oil pocket；
The B chamber passes through at least one check valve respectively and at least one damping hole is connected to the second oil pocket.
Further, it is provided with the first check valve on the upper piston rod, it is unidirectional that second is provided on the lower piston rod
Valve.
Further, it is provided with the first damping hole on the upper piston, the second damping hole is provided on the lower piston.
Further, sealing element is provided at the contact surface of the guide sleeve, upper piston and lower piston and cylinder barrel.
Further, sealing element is provided at the contact surface of the rear cover and lower piston rod.
Further, the sealing element is the slip-ring type combined sealing structure that this spy's envelope is constituted with elastic O-ring.
The beneficial effects of the present invention are:
Trailer of the present invention/semitrailer hydro pneumatic suspension device substitution leaf spring or air spring, apply to trailer or semi-mounted
On carrier, by the setting of hydro-pneumatic spring cylinder and leaf spring, hydro-pneumatic spring cylinder and the connection structure of vehicle frame and leaf spring are compact, and
Axle is set to the top of leaf spring, ensure that the transmission of active force between vehicle frame and wheel, and hydro-pneumatic spring cylinder makes trailer/semi-mounted
Vehicle is unloaded or good buffering effect can be achieved in full load, realizes vehicle driving stationarity.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is trailer of the present invention/semitrailer hydro pneumatic suspension device structural schematic diagram；
Fig. 2 is trailer of the present invention/semitrailer hydro pneumatic suspension device cross-sectional view.
Fig. 3 is in the cross-sectional view of extended state for the hydro-pneumatic spring cylinder in trailer of the present invention/semitrailer hydro pneumatic suspension device.
Fig. 4 is in the cross-sectional view of compressive state for the hydro-pneumatic spring cylinder in trailer of the present invention/semitrailer hydro pneumatic suspension device.
In figure, trunnion on trunnion 5-U type groove 6- pivot 7- under 1- flat spring bracket 2- leaf spring 3- hydro-pneumatic spring cylinder 4-
8-U type bolt 9- axle bed 10- axle；
Cylinder barrel 107- under the upper cylinder barrel 102- upper piston rod 103- upper piston 104- guide sleeve 105- rear cover 106- of 101-
Lower piston rod 108- lower piston 109- rear end cap 110-A chamber 111-B chamber 112- the first oil pocket the second oil pocket of 113- 114-
A chamber interface 115-B chamber interface 116- the first check valve 117- second one-way valve the first damping hole of 118- 119- second is damped
Hole.
Specific embodiment
In order to deepen the understanding of the present invention, further details of theory is made to the present invention with reference to the accompanying drawings and examples
It is bright.The following examples are only intended to illustrate the technical solution of the present invention more clearly, and cannot be used as a limitation and limit guarantor of the invention
Protect range.
Specific embodiments of the present invention are,.
As illustrated in fig. 1 and 2, a kind of trailer/semitrailer hydro pneumatic suspension device of the present invention, including flat spring bracket, leaf spring and oil
Gas spring cylinder, flat spring bracket are fixed on vehicle frame, and one end of leaf spring is bolted mode and fixes with flat spring bracket, leaf spring
The other end is connect with the lower trunnion of hydro-pneumatic spring cylinder, it is characterised in that:
The other end of leaf spring is a U-type groove, and U-type groove both ends are equipped with through-hole, the lower trunnion of hydro-pneumatic spring cylinder by bolt with
It is pivotally connected, the both ends of pivot are provided with protrusion, protrude through through-hole setting；
The upper trunnion of hydro-pneumatic spring cylinder is connect with upper bracket, and upper bracket is fixed on vehicle frame, and upper bracket is a U-type groove, U-shaped
Slot both ends are equipped with through-hole, and the upper trunnion of hydro-pneumatic spring cylinder by bolt and is pivotally connected, and the both ends of pivot are provided with protrusion, protrude
It is arranged across through-hole；
The interlude of leaf spring is fixed on axle by U-bolt and axle bed, and U-bolt passes through across axle bed from bottom to top
Nut check, axle are located at the top of leaf spring.
In the present embodiment, leaf spring is L-type.
As shown in Figures 3 and 4, hydro-pneumatic spring cylinder includes upper hydro-pneumatic spring and lower hydro-pneumatic spring, upper hydro-pneumatic spring and lower oil gas
Spring is the setting of upper and lower serial mechanism, and upper hydro-pneumatic spring includes upper cylinder barrel, upper piston rod, upper piston, guide sleeve and rear cover, lower oil
Gas spring includes lower cylinder barrel, lower piston rod, lower piston and rear end cap,
Wherein, upper piston rod and upper piston are nested in cylinder barrel, and lower piston rod and lower piston are nested in lower cylinder barrel, on
Piston rod is internally provided with cavity, and the outer diameter of lower piston rod is less than the internal diameter of cavity, and lower piston rod is nested in cavity, lower work
Stopper rod is moved back and forth along cavity；
The upper end of upper cylinder barrel is provided with guide sleeve, and guide sleeve is bolted to connection with upper cylinder barrel, the lower end of upper cylinder barrel
It is provided with rear cover, rear cover and upper cylinder barrel are integrally formed；
The upper end of lower cylinder barrel is bolted to connection with rear cover, and the lower end of lower cylinder barrel and rear end cap are bolted company
It connects；
The bottom end of upper piston and the top of rear end cap abut against, and the lower end surface of lower piston and rear end cap abuts against；
A chamber is formed between upper piston rod, upper piston, guide sleeve and upper cylinder barrel, between lower piston rod, upper piston and upper cylinder barrel
The first oil pocket is formed, B chamber is formed between lower piston and lower cylinder barrel, forms the second oil pocket between lower piston and rear end cap；Upper cylinder barrel
Top side is provided with A chamber interface, and rear end cap side is provided with B chamber interface；
A chamber passes through at least one check valve respectively and at least one damping hole is connected to the first oil pocket；
B chamber passes through at least one check valve respectively and at least one damping hole is connected to the second oil pocket.
It is provided with the first check valve in the present embodiment, on upper piston rod, is provided with second one-way valve on lower piston rod.
It is provided with the first damping hole in the present embodiment, on upper piston, the second damping hole is provided on lower piston.
In the present embodiment, sealing element is provided at the contact surface of guide sleeve, upper piston and lower piston and cylinder barrel.
In the present embodiment, sealing element is provided at the contact surface of rear cover and lower piston rod.
In the present embodiment, sealing element is the slip-ring type combined sealing structure that this spy's envelope is constituted with elastic O-ring, is sealed by this spy
The slip-ring type combined sealing structure constituted with elastic O-ring, the sealing of piston rod and suspension cylinder barrel for hydro pneumatic suspension, can also
With the sealing for piston and cylinder barrel.The geometry of sealing ring is stairstepping, can achieve zero leakage, there is 2 under sealing ring
Abrasion of the 0 shape rubber ring as elastomer, to compensation sealing circle with pre compressed magnitude.This sealing has good self-lubricating
Property, anti-creep and corrosion resistance, and coefficient of friction is low.
Hydro-pneumatic spring in trailer of the present invention/semitrailer hydro pneumatic suspension device is using built in double piston-rod, four chamber two-passes
Series connection hydro-pneumatic spring cylinder, is made of, upper piston rod is internally provided with cavity, and lower piston rod is nested in cavity, edge twin-tub cylinder
Cavity move back and forth, limit the operating path of lower piston rod, though reducing the stroke of hydro-pneumatic spring cylinder, ensure that oil gas
The stability of spring cylinder operation, is suitble to heavy-duty vehicle conditional for height of car.
Trailer of the present invention/semitrailer hydro pneumatic suspension device specific work process is:
Trailer of the present invention/semitrailer hydro pneumatic suspension device is installed on trailer/semitrailer, when trailer/semitrailer is low negative
When load, upper hydro-pneumatic spring cylinder filled with low-pressure nitrogen compression buffering downlink, filled with the not work at this time of hydro-pneumatic spring cylinder under high pressure nitrogen
Make, the lower hydro-pneumatic spring cylinder pressure filled with high pressure nitrogen is higher than upper hydro-pneumatic spring cylinder at this time.When load reaches certain value, filled with
The upper hydro-pneumatic spring cylinder buffering of low pressure continues traveling downwardly, when reaching the high pressure nitrogen pressure of lower hydro-pneumatic spring cylinder, at this point, upper and lower oil gas
Spring cylinder works together, and reaches good buffering effect.
The working principle of two hydro-pneumatic springs is identical as general single chamber hydragas spring up and down in the present invention, fills in A chamber
There is a low-pressure nitrogen, filled with high pressure nitrogen in B chamber, when external load impacts, upper piston rod is compressed into the first oil pocket, liquid
Pressure oil enters A chamber through the first check valve and the first damping hole, and because the intracavitary portion's low-pressure nitrogen volume of A becomes smaller, pressure increases, with load
It is rapidly achieved balance, plays buffer function；When external load reaches the high pressure nitrogen pressure of lower hydro-pneumatic spring cylinder, at this point, on
Lower hydro-pneumatic spring cylinder works together, and lower piston rod is compressed into the second oil pocket, and hydraulic oil is through second one-way valve and the second damping hole
Into B chamber, because the intracavitary portion's high pressure nitrogen volume of B becomes smaller, pressure increases, and is rapidly achieved balance with load, reaches good buffering
Effect.
When upper hydro-pneumatic spring is when in a compressed state, the damping force of upper hydro-pneumatic spring is relatively low, pooling feature mainly by
Air compression variation is completed, and when the load of upper hydro-pneumatic spring reaches the high pressure nitrogen pressure of lower hydro-pneumatic spring, under introducing
The high pressure nitrogen of hydro-pneumatic spring, lower hydro-pneumatic spring realizes secondary buffer；When upper hydro-pneumatic spring is in reset condition, upper oil gas bullet
Closed check valve in spring cylinder, oil liquid can only be flowed through by damping hole, increase oil flow in this way, and upper hydro-pneumatic spring cylinder generates
Biggish damping force, it is suppressed that restoring movement, and rapidly decaying vibration.The purpose of present apparatus is exactly to utilize two concatenated oil gas
The variation rigidity of spring cylinder and variable resistance damping characteristics reach good buffering and effectiveness in vibration suppression.
It is noted that embodiment described above is the affiliated technology neck to the illustrative and not limiting of technical solution of the present invention
The equivalent replacement of domain those of ordinary skill or other modifications made according to the prior art, as long as not exceeding the technology of the present invention side
The thinking and range of case, should be included within interest field of the presently claimed invention.
Claims (8)
1. a kind of trailer/semitrailer hydro pneumatic suspension device, including flat spring bracket, leaf spring and hydro-pneumatic spring cylinder, the flat spring bracket
Be fixed on vehicle frame, one end of the leaf spring is bolted mode and fixes with flat spring bracket, the other end of the leaf spring with
The lower trunnion of hydro-pneumatic spring cylinder connects, it is characterised in that:
The other end of the leaf spring is a U-type groove, and the U-type groove both ends are equipped with through-hole, and the lower trunnion of the hydro-pneumatic spring cylinder is logical
It crosses bolt and is pivotally connected, the both ends of the pivot are provided with protrusion, described to protrude through through-hole setting；
The upper trunnion of the hydro-pneumatic spring cylinder is connect with upper bracket, and the upper bracket is fixed on vehicle frame, and the upper bracket is a U
Type groove, the U-type groove both ends are equipped with through-hole, and the upper trunnion of the hydro-pneumatic spring cylinder by bolt and is pivotally connected, the pivot
Both ends be provided with protrusion, it is described to protrude through through-hole setting；
The interlude of the leaf spring is fixed on axle by U-bolt and axle bed, and the U-bolt passes through axle bed from bottom to top
By nut check, the axle is located at the top of leaf spring.
2. a kind of trailer according to claim 1/semitrailer hydro pneumatic suspension device, it is characterised in that: the leaf spring is L
Type.
3. a kind of trailer/semitrailer hydro pneumatic suspension device according to claim 1, it is characterised in that: the hydro-pneumatic spring cylinder
Including upper hydro-pneumatic spring and lower hydro-pneumatic spring, the upper hydro-pneumatic spring and lower hydro-pneumatic spring are the setting of upper and lower serial mechanism, described
Upper hydro-pneumatic spring includes upper cylinder barrel, upper piston rod, upper piston, guide sleeve and rear cover, the lower hydro-pneumatic spring include lower cylinder barrel, under
Piston rod, lower piston and rear end cap,
Wherein, the upper piston rod and upper piston are nested in cylinder barrel, and the lower piston rod and lower piston are nested in lower cylinder barrel
Interior, the upper piston rod is internally provided with cavity, and the outer diameter of the lower piston rod is less than the internal diameter of cavity, the lower piston rod
It is nested in cavity, the lower piston rod is moved back and forth along cavity；
The upper end of the upper cylinder barrel is provided with guide sleeve, and the guide sleeve is bolted to connection with upper cylinder barrel, the upper cylinder half
The lower end of cylinder is provided with rear cover, and the rear cover and upper cylinder barrel are integrally formed；
The upper end of the lower cylinder barrel is bolted to connection with rear cover, and the lower end of the lower cylinder barrel and rear end cap are solid by bolt
Fixed connection；
The bottom end of the upper piston and the top of rear end cap abut against, and the lower end surface of the lower piston and rear end cap abuts against；
A chamber, the lower piston rod, upper piston and upper cylinder barrel are formed between the upper piston rod, upper piston, guide sleeve and upper cylinder barrel
Between form the first oil pocket, between the lower piston and lower cylinder barrel formed B chamber, form second between the lower piston and rear end cap
Oil pocket；The upper cylinder barrel top side is provided with A chamber interface, and the rear end cap side is provided with B chamber interface；
The A chamber passes through at least one check valve respectively and at least one damping hole is connected to the first oil pocket；
The B chamber passes through at least one check valve respectively and at least one damping hole is connected to the second oil pocket.
4. a kind of trailer/semitrailer hydro pneumatic suspension device according to claim 3, it is characterised in that: on the upper piston rod
It is provided with the first check valve, is provided with second one-way valve on the lower piston rod.
5. a kind of trailer/semitrailer hydro pneumatic suspension device according to claim 3, it is characterised in that: set on the upper piston
It is equipped with the first damping hole, the second damping hole is provided on the lower piston.
6. a kind of trailer/semitrailer hydro pneumatic suspension device according to claim 3, it is characterised in that: the guide sleeve, upper work
Sealing element is provided at the contact surface of plug and lower piston and cylinder barrel.
7. a kind of trailer/semitrailer hydro pneumatic suspension device according to claim 3, it is characterised in that: the rear cover and lower work
Sealing element is provided at the contact surface of stopper rod.
8. a kind of trailer/semitrailer hydro pneumatic suspension device described according to claim 6 or 7, it is characterised in that: the sealing element is
The slip-ring type combined sealing structure that Si Te envelope is constituted with elastic O-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910492430.2A CN110194038A (en) | 2019-06-06 | 2019-06-06 | A kind of trailer/semitrailer hydro pneumatic suspension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910492430.2A CN110194038A (en) | 2019-06-06 | 2019-06-06 | A kind of trailer/semitrailer hydro pneumatic suspension device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110194038A true CN110194038A (en) | 2019-09-03 |
Family
ID=67754109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910492430.2A Pending CN110194038A (en) | 2019-06-06 | 2019-06-06 | A kind of trailer/semitrailer hydro pneumatic suspension device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110194038A (en) |
-
2019
- 2019-06-06 CN CN201910492430.2A patent/CN110194038A/en active Pending
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