CN208411336U - Single capsule suspension gas spring built in one kind - Google Patents

Abstract

The utility model discloses capsule suspension gas springs single built in one kind, including cylinder cap, outer cylinder, inner cylinder tube, piston rod and capsule, aerating mouth is provided on the outer cylinder, the inner cylinder tube is fixed in outer cylinder by cylinder cap, the piston for inner cylinder tube to be separated into the first grease chamber and the second grease chamber is movably set in the inner cylinder tube, the piston rod protrudes into inner cylinder tube and is fixedly connected with the piston, the capsule is fixed between outer cylinder and inner cylinder tube, and third grease chamber is formed between capsule and inner cylinder tube, gas chamber is formed between capsule and outer cylinder；The third grease chamber is communicated with the first grease chamber, and first grease chamber is communicated with the second grease chamber, and the gas chamber is communicated with aerating mouth.The utility model can maintain that vehicle clearance is constant and spring offset frequency is constant when vehicle dead load changes, and ride comfort that no matter unloaded and heavy-duty vehicle can be consistent and handling.

Description

Single capsule suspension gas spring built in one kind

Technical field

The utility model relates to capsule suspension gas springs single built in automobile suspension system field more particularly to one kind.

Background technique

Automobile suspension system refers to an attachment structure system between vehicle body, vehicle frame and wheel, and this structural system Contain shock absorber, bearing spring, sway bar, suspention auxiliary girder, lower control arm, longitudinal rod, knuckle arm, rubber bush and connecting rod etc. Component.It is shaken and impacts because of the variation on ground when running car is on road surface, strength wherein one of these impacts Part can be absorbed by tire, but be mostly to absorb by the draft hitch between tire and vehicle body.

In automobile suspension system, it is hydro pneumatic suspension that hydro-pneumatic spring, which is a kind of suspension flexibility damping element of function admirable, Core, have damping characteristic and nonlinear stiffness characteristic concurrently, be to utilize oil liquid using inert nitrogen as elastic element Flow resistance realizes vibration damping, while the transmitting of accurately movement and power is realized using the Incoercibility of oil liquid.Oil gas bullet Spring has variation rigidity characteristic, makes the vehicle for installing hydro pneumatic suspension that lower eigentone can be obtained, so as to improve driver Working condition and improve average speed, and hydro-pneumatic spring can also be achieved the adjusting of bodywork height.

Chinese patent notification number is that the prior art of CN104047987A disclosed a kind of new oil on September 17th, 2014 Gas spring has an episphere room in the inner cavity of the fixed device of upper lift ring, and there is rubber oil air bound film at the place suitable for reading of work cylinder barrel, on Hemisphere room and rubber oil air bound film form the interior plenum chamber for filling high pressure gas an of sealing, rubber oil air bound film, work cylinder barrel Closed rodless cavity, piston, piston rod outer wall, work cylinder barrel are surrounded between inner wall and piston below rubber oil air bound film Annular chamber is surrounded between inner wall and lower wall, has air bag and orifice valve in the inner cavity of piston rod；There are four being opened on the side wall of orifice valve The second radially uniformly distributed trapezoidal hole, opens that there are four radially uniformly distributed with four the second trapezoidal holes on the side wall of piston rod In the first trapezoidal hole of same radial position.The working principle of the patent are as follows: when vehicle dead load changes, pass through to Grease chamber charge and discharge oil liquid changes piston rod outward thrust, to achieve the purpose that maintain chassis height constant.But it is actually using In the process, due to load change, it will cause the variation of gas chamber static volumetric, therefore under different loads situation, gas chamber static volumetric Different, spring rate and the non-linear relationship of quality of loads cause spring offset frequency to increase with load and increase and reduce with load And reduce, unstable offset frequency.Also as oil liquid flow resistance in oil pipe is big, limited by valve latus rectum, leads to vehicle bottom Disk lifting speed is slow.

In addition, existing automotive suspension also usually uses rubber air spring, but the operating pressure of rubber air spring is lower, It generally in 0.6MPa or so, is limited by leather bag radial dimension, the tonnage that can bear car load is usually no more than 3.5 tons, deposits In the defect of narrow application range.Correspondingly, when car load is widely varied, air pressure change in air bag, outside air bag Diameter variation, piston bearing area can follow variation, so while can adjust the gas in air bag when load change by inflation/deflation Pressure carries to maintain chassis height constant, but because stiffness variation and the non-linear relationship of quality of loads, the smaller offset frequency of load is bigger The bigger offset frequency of lotus is smaller, however it remains the unstable defect of suspension offset frequency.

Utility model content

The purpose of the utility model is to overcome the above-mentioned problems in the prior art, it is outstanding to provide single capsule built in one kind Frame gas spring, the utility model can maintain that vehicle clearance is constant when vehicle dead load changes and spring offset frequency not Become, and ride comfort that no matter unloaded and heavy-duty vehicle can be consistent and handling.

To achieve the above object, the technical solution adopted in the utility model is as follows:

Single capsule suspension gas spring built in one kind, it is characterised in that: including cylinder cap, outer cylinder, inner cylinder tube, piston rod and Capsule is provided with aerating mouth on the outer cylinder, and the inner cylinder tube is fixed in outer cylinder by cylinder cap, living in the inner cylinder tube The dynamic piston being provided with for inner cylinder tube to be separated into the first grease chamber and the second grease chamber, the piston rod protrude into inner cylinder tube and piston It is fixedly connected, the capsule is fixed between outer cylinder and inner cylinder tube, and third grease chamber, capsule are formed between capsule and inner cylinder tube Gas chamber is formed between outer cylinder；The third grease chamber is communicated with the first grease chamber, and first grease chamber is communicated with the second grease chamber, institute Gas chamber is stated to communicate with aerating mouth.

The capsule, outer cylinder, inner cylinder tube and piston rod axial line be on the same straight line.

The piston axially offers damping oil hole, and damping valve module is equipped in damping oil hole；The piston radial No. two oilholes being connected to damping oil hole are offered, first grease chamber passes through damping oil hole and No. two oilholes and the second grease chamber phase It is logical.

Multiple No.1 oilholes are provided on the inner cylinder tube, first grease chamber passes through No.1 oilhole and third grease chamber phase It is logical.

The cylinder cap includes cover board and is integrally formed annular groove on the cover board, the annular groove be located at outer cylinder and Between inner cylinder tube.

The capsule is tubular structure, and annular cuff is fixedly installed on the inner wall at capsule both ends, capsule one end Annular cuff interference is mounted in the annular groove of cylinder cap, and the annular cuff interference of the capsule other end is mounted on inner cylinder tube waist In annular gain.

The annular cuff of described capsule one end is fixed in the annular groove of cylinder cap by outer cylinder, the annular sleeve of the other end Mouth is fixed in the annular gain of inner cylinder tube waist by snap ring.

Support ring is provided between the piston and inner cylinder tube.

Seal assembly and lower support ring are provided between the piston rod and inner cylinder tube, between the inner cylinder tube and outer cylinder It is provided with sealing ring.

It is fixedly installed the first connector on the cylinder cap, the second connector is fixedly installed on the piston rod.

The interior bottom of the inner cylinder tube is fixedly installed stretching limit rubber block, is fixedly installed on second connector Compression limit rubber block.

Using utility model has the advantages that

1, single capsule gas spring in the utility model includes cylinder cap, outer cylinder, inner cylinder tube, piston, piston rod and glue Capsule, and the first grease chamber, the second grease chamber, third grease chamber and gas chamber are formd, by the cooperation of above structure, so that the oil in grease chamber Liquid total amount is invariable, and in actual use, i.e. changeable without changing gas chamber volume by the pressure for changing gas chamber The load-carrying ability of vehicle is that the chassis height of vehicle can be changed and it is made to have suitable terrain clearance by changing gas chamber volume. Therefore when vehicle dead load changes, suspension offset frequency is able to maintain stabilization, and then vehicle can be made with excellent handling With the purpose for keeping ride comfort stable well under the premise of the driving of safety.

2, the utility model, can be empty in the limited height of automotive suspension by capsule and piston rod, inner cylinder tube arranged concentric The interior stroke by spring designs bigger, and vehicle chassis is made to have better passability.Also, in actual use, Capsule is radial deformation with the deformation that piston rod disengaging inner cylinder tube generates, and when the long enough of capsule Design of length, capsule is radially swollen Swollen and shrinking percentage will very little, it can be ensured that capsule has enough service life.

3, the utility model is axially disposed with damping valve module in piston, damps valve module and No. two oilholes connect and compose the The oil passage of one grease chamber and the second grease chamber, and bidirectional damper is provided to the oil liquid of flowing, be conducive to the vibration of decaying vehicle body.

4, capsule is set as tubular structure by the utility model, not only improves manufacture and installation is fixed, and be conducive to capsule two The oil liquid and gas chamber gas of grease chamber is reliably isolated in the interference seal of end ring shape cuff.

5, the annular cuff of capsule one end is mounted on the annular groove and outer cylinder of cylinder cap with interference in the utility model Between, the annular cuff of the other end is mounted on interference between the annular gain of inner cylinder tube waist and snap ring, it is ensured that capsule is swollen When swollen and contraction, the annular cuff at both ends can steadily seal the gas of gas chamber and the liquid of third grease chamber.

6, the utility model by stretch limit rubber block and compression limit rubber block can prevent piston and inner cylinder tube and Rigid collision between second connector and outer cylinder.

7, the utility model is compact-sized, and gas chamber operating pressure is up to 10MPa, can carry up to 4 tons of spring, and Outer diameter is but not more than 140mm；It installs and uses, can also use suitable for vehicles such as commercial car, commercial truck, military transport vehicles It is used in other types vehicle of less demanding.

8, the utility model structure is simple, easily fabricated, and maintenance cost is low, and the service life is long.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of embodiment 1.

Fig. 2 is the structural schematic diagram of embodiment 2.

In the figure, it is marked as the 1, first connector, 2, No.1 oilhole, 3, annular cuff, 4, outer cylinder, 5, piston, 6, capsule, 7, damping oil hole, 8, inner cylinder tube, the 9, second grease chamber, 10, stretching limit rubber block, 11, upper support ring, 12, seal assembly, 13, Second connector, 14, compression limit rubber block, 15, piston rod, 16, lower support ring, 17, sealing ring, 18, gas chamber, 19, snap ring, 20, cylinder cap, 21, aerating mouth, 22, No. two oilholes, 23, third grease chamber, 24, damping valve module, the 25, first grease chamber.

Specific embodiment

Embodiment 1

Single capsule suspension gas spring built in one kind, including cylinder cap 20, outer cylinder 4, inner cylinder tube 8, piston rod 15 and capsule 6, aerating mouth 21 is provided on the outer cylinder 4, the inner cylinder tube 8 is fixed in outer cylinder 4 by cylinder cap 20, the inner cylinder tube The piston 5 for inner cylinder tube 8 to be separated into the first grease chamber 25 and the second grease chamber 9 is movably set in 8, the piston rod 15 protrudes into Inner cylinder tube 8 is fixedly connected with piston 5, and the capsule 6 is fixed between outer cylinder 4 and inner cylinder tube 8, and capsule 6 and inner cylinder tube 8 it Between formed third grease chamber 23, between capsule 6 and outer cylinder 4 formed gas chamber 18；The third grease chamber 23 is communicated with the first grease chamber 25, First grease chamber 25 is communicated with the second grease chamber 9, and the gas chamber 18 is communicated with aerating mouth 21.

In the present embodiment, the piston 5 is axial to offer damping oil hole 7, and damping valve module is equipped in damping oil hole 7 24, the damping valve module 24 provides damp channel for the oil liquid of the first grease chamber 25 and the second grease chamber 9.The piston 5 is radial to be opened Equipped with No. two oilholes 22 being connected to damping oil hole 7, first grease chamber 25 passes through damping oil hole 7 and No. two oilholes 22 and second Grease chamber 9 communicates.Multiple No.1 oilholes 2 are provided on the inner cylinder tube 8, first grease chamber 25 passes through No.1 oilhole 2 and third Grease chamber 23 communicates.Wherein, No.1 oilhole 2 can be round, rectangular etc., and No. two oilholes 22 can be round, rectangular, triangle etc..

In the present embodiment, the capsule 6 is tubular structure, and preferably capsule 6 is cone tubular structure or cylindrical structure；Glue Annular cuff 3 is fixedly installed on the inner wall at 6 both ends of capsule, 3 interference of annular cuff of 6 one end of capsule is mounted on the ring of cylinder cap 20 In connected in star, 3 interference of annular cuff of 6 other end of capsule is mounted in the annular gain of 8 waist of inner cylinder tube, specifically, capsule 6 The annular cuff 3 of one end is fixed in the annular groove of cylinder cap 20 by outer cylinder 4, and the annular cuff 3 of the other end passes through snap ring 19 are fixed in the annular gain of 8 waist of inner cylinder tube.And install after capsule 6, outer cylinder 4, inner cylinder tube 8 and piston rod 15 axis Heart line is on the same straight line.Further, the annular cuff 3 positioned at 6 upper end of capsule and the annular cuff positioned at 6 lower end of capsule 3 wall thickness is all larger than 1 times of wall thickness of 6 other positions of capsule or more, and the width of annular cuff 3 is not less than cuff wall thickness.

In the present embodiment, the cylinder cap 20 includes the annular groove of cover board and integrated molding on the cover board, and the annular is recessed Slot position is between outer cylinder 4 and inner cylinder tube 8.The outer cylinder 4 is upper end opening, and lower end offers the knot of stepped hole and through-hole Structure, and the stepped hole is adapted with 8 outer diameter of inner cylinder tube；The inner cylinder tube 8 is upper end opening, and lower end offers the structure of through-hole, And the through-hole aperture of 4 lower end of through-hole and outer cylinder of 8 lower end of inner cylinder tube is all the same.When installation, inner cylinder tube 8 offers the one of through-hole End is mounted in the stepped hole of outer cylinder 4, and the other end is fixed by cylinder cap 20, and piston rod 15 sequentially passes through the through-hole of outer cylinder 4 It is connect with after the through-hole of inner cylinder tube 8 with piston 5.Further, the first connector 1 is fixedly installed on the cylinder cap 20, it is described Be fixedly installed the second connector 13 on piston rod 15, gas spring by the first connector 1 and the second connector 13 respectively with Automotive suspension is fixedly connected with vehicle body.Further, the interior bottom of the inner cylinder tube 8 is fixedly installed stretching limit rubber block 10, and stretching limit rubber block 10 is set in 15 surrounding of piston rod；Compression limit is fixedly installed on second connector 13 Position rubber block 14, and the junction of the second connector 13 and piston rod 15 is arranged in compression limit rubber block 14.

In the present embodiment, sealing ring 17 is provided between the inner cylinder tube 8 and outer cylinder 4, and the sealing ring 17 setting exists Between the stepped hole and inner cylinder tube 8 of outer cylinder 4；Seal assembly 12 and lower branch are provided between the piston rod 15 and inner cylinder tube 8 Pushing out ring 16, and as needed, the quantity of lower support ring 16 can be two.

The working principle of the present embodiment are as follows:

One, wheel hop when vehicle driving

1, when jumping on wheel, piston rod 15 is (upward) mobile in cylinder with piston 5, and the volume of the second grease chamber 9 increases, the The volume of one grease chamber 25 reduces, damping valve module 24 He of the part oil liquid through being mounted in damping oil hole 7 in the first grease chamber 25 No. two oilholes 22 are inhaled into the second grease chamber 9, while this part oil liquid passes through generation spring-compressed damping force when damping valve module 24, Another part oil liquid, which is pressed into third grease chamber 23 through No.1 oilhole 2, causes 23 oil liquid volume of third grease chamber to increase, and forces capsule 6 swollen Swollen, 18 volume of gas chamber reduces, and gas pressure intensity increases, and gas spring elastic force increases.

2, when jumping under wheel, with piston 5 toward movement (downward) outside cylinder, the volume of the second grease chamber 9 reduces piston rod 15, the The volume of one grease chamber 25 increases, and the oil liquid in the second grease chamber 9 is through No. two oilholes 22 and the damping valve group being mounted in damping oil hole 7 Part 24 is pressed into the first grease chamber 25, this part oil liquid generates spring elongation damping force third simultaneously when through damping valve module 24 Oil liquid in grease chamber 23 is inhaled into the first grease chamber 25 through No.1 hydraulic fluid port, causes 23 oil liquid volume reducing of third grease chamber, forces glue Capsule 6 is shunk, and 18 volume of gas chamber increases, and gas spring elastic force reduces.

Two, vehicle body lifting when load is constant

1, it increases vehicle body: being filled with gas by 21 pairs of gas chambers 18 of aerating mouth, 18 volume of gas chamber increases, and capsule 6 shrinks and squeezes The oil liquid of third grease chamber 23 is pressed to enter the first grease chamber 25, so that piston rod 15 is released inner cylinder tube 8, vehicle body is increased, and works as vehicle When body is increased to setting value, aerating mouth 21 stops aerating.

2, it reduces vehicle body: being deflated by 21 pairs of gas chambers 18 of aerating mouth, 18 volume of gas chamber reduces, and the expansion of capsule 6 causes first The oil liquid of grease chamber 25 enters third grease chamber 23, so that piston rod 15 protrudes into inner cylinder tube 8, vehicle body is decreased, when vehicle body is increased to When setting value, aerating mouth 21 stops deflating.

Three, vehicle dead load changes

1, bodywork height declines when dead load increases, and is filled with gas to gas chamber 18 by aerating mouth 21 at this time, increases gas chamber 18 pressure, and piston rod 15 is transmitted to by the oil liquid of capsule 6, third grease chamber 23, the first grease chamber 25, increase gas spring bullet Power uploads loading power to reach balance spring, and when vehicle body returns to setting height, aerating mouth 21 stops aerating.

2, bodywork height increases when dead load reduces, and is vented at this time by aerating mouth 21, reduces 18 pressure of gas chamber, and pass through Capsule 6, third grease chamber 23, the first grease chamber 25 oil liquid be transmitted to piston rod 15, reduce gas spring elastic force, to reach balance spring Loading power is uploaded, when vehicle body returns to setting height, aerating mouth 21 stops deflating.

When due to load change, by the 21 pairs of inflations of gas chamber 18 of aerating mouth, deflates and tieed up with increasing, reducing 18 pressure of gas chamber It is constant to hold bodywork height, 18 volume of gas chamber is there is no changing, and the stiffness of air spring is only directly proportional to quality of loads, and spring offset frequency It is inversely proportional with sprung mass, therefore spring offset frequency will not change because of load change.

Embodiment 2

The present embodiment is substantially the same manner as Example 1, and the main distinction is: being provided between the piston 5 and inner cylinder tube 8 Support ring 11.

Content described in this specification embodiment is only to be able to achieve the preferred embodiment of the utility model function and performance, Without departing substantially from the utility model substantial function in the case where, obvious change that those skilled in the art makes structure Belong to the protection scope of the utility model.

Claims (10)

1. single capsule suspension gas spring built in one kind, it is characterised in that: including cylinder cap (20), outer cylinder (4), inner cylinder tube (8), Piston rod (15) and capsule (6) are provided with aerating mouth (21) on the outer cylinder (4), and the inner cylinder tube (8) passes through cylinder cap (20) It is fixed in outer cylinder (4), is movably set in the inner cylinder tube (8) for inner cylinder tube (8) to be separated into the first grease chamber (25) With the piston (5) of the second grease chamber (9), the piston rod (15) is protruded into inner cylinder tube (8) and is fixedly connected with piston (5), the capsule (6) it is fixed between outer cylinder (4) and inner cylinder tube (8), and forms third grease chamber (23) between capsule (6) and inner cylinder tube (8), glue Gas chamber (18) are formed between capsule (6) and outer cylinder (4)；The third grease chamber (23) communicates with the first grease chamber (25), and described first Grease chamber (25) is communicated with the second grease chamber (9), and the gas chamber (18) communicates with aerating mouth (21).

2. single capsule suspension gas spring built in one kind as described in claim 1, it is characterised in that: the capsule (6), outer shell The axial line of cylinder (4), inner cylinder tube (8) and piston rod (15) is on the same straight line.

3. single capsule suspension gas spring built in one kind as claimed in claim 1 or 2, it is characterised in that: piston (5) axis To offering damping oil hole (7), and damping valve module (24) is installed in damping oil hole (7)；The piston (5) radially offers No. two oilholes (22) being connected to damping oil hole (7), first grease chamber (25) pass through damping oil hole (7) and No. two oilholes (22) It is communicated with the second grease chamber (9).

4. single capsule suspension gas spring built in one kind as described in claim 1, it is characterised in that: on the inner cylinder tube (8) Multiple No.1 oilholes (2) are provided with, first grease chamber (25) is communicated by No.1 oilhole (2) with third grease chamber (23).

5. single capsule suspension gas spring built in one kind as described in claim 1, it is characterised in that: the cylinder cap (20) includes The annular groove of cover board and integrated molding on the cover board, the annular groove are located between outer cylinder (4) and inner cylinder tube (8).

6. single capsule suspension gas spring built in one kind as described in any one of claim 1,2,4 or 5, it is characterised in that: The capsule (6) is tubular structure, and is fixedly installed annular cuff (3) on the inner wall at capsule (6) both ends, capsule (6) one Annular cuff (3) interference at end is mounted in the annular groove of cylinder cap (20), annular cuff (3) interference of capsule (6) other end It is mounted in the annular gain of inner cylinder tube (8) waist.

7. single capsule suspension gas spring built in one kind as claimed in claim 6, it is characterised in that: described capsule (6) one end Annular cuff (3) be fixed in the annular groove of cylinder cap (20) by outer cylinder (4), the annular cuff (3) of the other end passes through Snap ring (19) is fixed in the annular gain of inner cylinder tube (8) waist.

8. single capsule suspension gas spring built in one kind as described in claim 1, it is characterised in that: the piston (5) with it is interior Support ring (11) are provided between cylinder barrel (8).

9. single capsule suspension gas spring, feature exist built in one kind as described in any one of claim 1,2,4,5 or 8 In: seal assembly (12) and lower support ring (16), the inner cylinder tube are provided between the piston rod (15) and inner cylinder tube (8) (8) it is provided between outer cylinder (4) sealing ring (17).

10. single capsule suspension gas spring built in one kind as described in claim 1, it is characterised in that: on the cylinder cap (20) It is fixedly installed the first connector (1), is fixedly installed the second connector (13) on the piston rod (15).