CN101973197A - Full-automatic mechanical vehicle height regulation oil-gas suspension frame - Google Patents
Full-automatic mechanical vehicle height regulation oil-gas suspension frame Download PDFInfo
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- CN101973197A CN101973197A CN 201010515934 CN201010515934A CN101973197A CN 101973197 A CN101973197 A CN 101973197A CN 201010515934 CN201010515934 CN 201010515934 CN 201010515934 A CN201010515934 A CN 201010515934A CN 101973197 A CN101973197 A CN 101973197A
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- pneumatic spring
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Abstract
The invention relates to a full-automatic mechanical vehicle height regulation oil-gas suspension frame, which belongs to the technical field of oil-gas suspension frames, wherein an oil-gas spring upper support seat, an oil-gas spring upper cylinder tube and an oil-gas spring lower cylinder tube are fixedly connected to form a cylinder body; a low-voltage energy accumulator, a high-voltage energy accumulator and an orifice valve are all in external arrangement, and are communicated with corresponding interfaces arranged on the oil-gas spring upper support seat; a piston rod slides upwards and downwards along the inner wall of the oil-gas spring lower cylinder tube; a regulating rod is a hollow rod and can slide upwards and downwards along the inner wall of a regulating sleeve pipe, the upper end is connected with a regulating rod interface arranged on the oil-gas spring upper support seat, the lower end is provided with a lead-in valve and a regulating rod oil hole, and the side wall of the lower part is provided with an oil drainage hole and an induction passage; and the regulating sleeve pipe is a hollow rod, is fixed on the inner wall of the piston rod, and is coaxial with the regulating rod and the piston rod, the upper end and the lower end are provided with sealing rings, and the lower end of the regulating sleeve pipe is provided with a lead-out valve and a regulating sleeve pipe oil hole. The invention can realize the automatic regulation of the vehicle height without an electronic control system, and has the advantages of simple structure, high reliability and good heat radiation performance.
Description
Technical field:
The present invention relates to a kind of full-automatic mechanical-type overall height and regulate hydro pneumatic suspension, belong to the hydro pneumatic suspension technical field.
Background technology:
Power actuated vehicle such as passenger vehicle, wagon load variation range are greatly and relatively frequently, for the vehicle that conventional suspension is housed, its bodywork height can't be regulated according to the load change situation.The variation of bodywork height has caused the change of suspension kinematical characteristic, aggravated Tyte Wear, increased rolling resistance, the variation of body gesture simultaneously also certainly will increase air resistance, vehicle handling and stability is caused bad influence, and increased oil consumption; The variation of bodywork height also can reduce to jump on the wheel or following moving stroke of jumping, and has increased the breakdown probability of suspension, destroys traveling comfort; If the load of vehicle increases, vehicle body can descend, and this has also reduced the crossing ability of vehicle.Therefore, the overall height control system can improve many performances of vehicle, on manned and goods carrying vehicle good prospects for application is arranged.Hydro-pneumatic spring transmits pressure with fluid, therefore only needs the hydro-pneumatic spring oil cylinder is carried out oil-filled and drain the oil realizing the lifting of overall height.Hydro-pneumatic spring is because its non-linear and cumulative property change rigidity, and is easy to realize overall height adjusting, widespread use on many heavy-dutys vehicle.
For in the patent of " 96100446.0 " a kind of height controller for car is disclosed at application number, this system utilizes a force gauge to detect the variation of vehicle load, sensor passes to controller with signal, the controller opens control cock, pressurized air charges into a spring corrugated pipe, thereby adjust the distance between steel spring and the vehicle frame, keep normal automobile height.But this system needs special force gauge, ECU, air pump, electromagnetic valve etc., and this has not only increased the cost of system, and system reliability is not high yet.
Summary of the invention:
A kind of full-automatic mechanical-type overall height that the object of the invention provides at the problems referred to above is just regulated hydro pneumatic suspension, need not any electronic control system, the automatically regulating bodywork height, and no matter how the load of vehicle changes, and bodywork height is all the time in the level of an expectation.
The present invention includes: cylinder barrel under cylinder barrel, the hydro-pneumatic spring on hydro-pneumatic spring upper bracket, high pressure accumulator, low pressure accumulator, dash pot valve, piston rod, adjusting sleeve, adjust bar, the hydro-pneumatic spring, it is characterized in that: hydro-pneumatic spring upper bracket left side middle-end is provided with the high pressure accumulator interface on being provided with in low pressure accumulator interface, the right side, middle lower end is provided with the adjust bar interface, be provided with two passages and communicate with high pressure accumulator interface, adjust bar interface between hydro-pneumatic spring upper bracket and first chamber, hydro-pneumatic spring upper bracket inwall is provided with negative thread; Cylinder barrel on the hydro-pneumatic spring, upper end outer wall and lower end outer wall are provided with outside thread; Cylinder barrel upper end inwall is provided with negative thread under the hydro-pneumatic spring; Piston rod is a hollow stem, and its upper end is provided with annular groove, by snap ring bump rubber is fixed in the annular groove, and the sidewall on piston rod top is provided with the piston rod oilhole; Be provided with delivery valve, adjusting sleeve oilhole in the lower end of adjusting sleeve, the outside, adjusting sleeve top and bottom respectively is provided with annular boss, has groove on the boss lateral surface, is placed with the first adjusting sleeve seal ring and the second adjusting sleeve seal ring in the groove; The lower end of adjust bar is equipped with delivery valve and is had the adjust bar oilhole, have the draining hole above the delivery valve, on the lateral wall of the lower end of adjust bar, be milled with groove, thereby, make the lower end lateral wall of adjust bar and be socketed between the outer adjusting sleeve inwall of adjust bar and form induction channels, and, it is consistent with the internal diameter of adjusting sleeve that adjust bar is socketed in the body of rod external diameter of the port section in the adjusting sleeve, adjust bar on the induction channels or under the body of rod external diameter of part be less than the internal diameter of adjusting sleeve, promptly refer between them, leave the gap;
Its annexation is: low pressure accumulator is by being communicated with the low pressure accumulator interface of hydro-pneumatic spring upper bracket; High pressure accumulator is communicated with dash pot valve by oil pipe; Dash pot valve one end is communicated with by oil pipe with high pressure accumulator, and the other end is communicated with high pressure accumulator interface on the hydro-pneumatic spring upper bracket; Cylinder barrel upper end extend into that socket is connected in the hydro-pneumatic spring upper bracket on the hydro-pneumatic spring, and the lower end extend under the hydro-pneumatic spring that socket is connected in the cylinder barrel; Under the hydro-pneumatic spring on cylinder barrel, the hydro-pneumatic spring cylinder barrel and hydro-pneumatic spring upper bracket three inwall form first chamber; Piston rod is socketed under the hydro-pneumatic spring in the cylinder barrel and slides up and down in first chamber along the inwall of cylinder barrel under the hydro-pneumatic spring, adjusting sleeve is socketed in the piston rod, the annular boss outside of its lower end, upper end is connected by adjusting sleeve seal ring and piston rod inner seal, and the boss bottom of adjusting sleeve upper end, the boss top of adjusting sleeve lower end, the adjusting sleeve part outside forms the 3rd chamber with the inwall of piston rod, and adjusting sleeve slides up and down along the adjust bar outer wall; The adjust bar upper end is connected with the adjust bar interface by the passage of hydro-pneumatic spring upper bracket, and the lower end extend in the adjusting sleeve, and adjust bar and adjusting sleeve form second chamber.
Beneficial effect of the present invention:
1. because energy storage of the present invention and dash pot valve are taked externally, so good heat dissipation is easy to arrange;
2. the overall height regulating mechanism is built in the oil cylinder, and the hydro-pneumatic spring cylinder sizes is little, and is simple in structure;
3. need not electronic control system and extra oil sources, so the reliability height, cost is low;
4. this full-automatic mechanical-type overall height adjusting hydro pneumatic suspension can change by the perception bodywork height, makes adjusting automatically, makes overall height remain on the level of an expectation.
Description of drawings
Fig. 1 is an axial section of the present invention;
Fig. 2 is the cutaway view of adjust bar (5) shown in Figure 1;
Fig. 3 is the A-A cutaway view of adjust bar (5) shown in Figure 2;
Fig. 4 is the B-B cutaway view of adjust bar (5) shown in Figure 2;
Fig. 5 is the cutaway view of adjusting sleeve (10) shown in Figure 1;
Fig. 6 is the A-A cutaway view of adjusting sleeve (10) shown in Figure 1;
Fig. 7 is that described full-automatic mechanical-type overall height is regulated hydro pneumatic suspension is regulated bodywork height when bodywork height is low view;
Fig. 8 is that described full-automatic mechanical-type overall height is regulated the view of hydro pneumatic suspension when vehicle body arrives ideal position;
Fig. 9 is that described full-automatic mechanical-type overall height is regulated hydro pneumatic suspension is regulated bodywork height when bodywork height is higher view.
Among the figure: 1-hydro-pneumatic spring upper bracket, 1a-low pressure accumulator interface, 1b-high pressure accumulator interface, 1c-adjust bar interface, 2-low pressure accumulator, 3-upper limit position block, cylinder barrel on the 4-hydro-pneumatic spring, 5-adjust bar, 5a-induction channels, 5b-draining hole, 5c-delivery valve, 5d-adjust bar oilhole, the 6-bump rubber, cylinder barrel under the 7-hydro-pneumatic spring, 8-lower position block, the 9-piston rod, 9a-piston rod oilhole, 10-adjusting sleeve, the 10a-delivery valve, 10b-adjusting sleeve oilhole, 11-high pressure accumulator, the 12-snap ring, 13a-first guidance tape, 13b-second guidance tape, the 14-obturator piston ring, the 15-dust ring, the 16a-first adjusting sleeve seal ring, the 16b-second adjusting sleeve seal ring, the 17-dash pot valve, G-first chamber, B-second chamber, H-the 3rd chamber.
The specific embodiment
Describe the present invention below in conjunction with accompanying drawing:
As shown in Figure 1, on being provided with in low pressure accumulator interface 1a, the right side, hydro-pneumatic spring upper bracket 1 left side middle-end is provided with high pressure accumulator interface 1b, middle lower end is provided with adjust bar interface 1c, be provided with two passages and communicate with high pressure accumulator interface (1b), adjust bar interface (1c) between hydro-pneumatic spring upper bracket (1) and first chamber (G), hydro-pneumatic spring upper bracket (1) inwall is provided with negative thread; Cylinder barrel 4 on the hydro-pneumatic spring, and upper end outer wall and lower end outer wall are provided with outside thread; Cylinder barrel 7 upper end inwalls are provided with negative thread under the hydro-pneumatic spring, and the first guidance tape 13a, obturator piston ring 14, the second guidance tape 13b, dust ring 15 from top to bottom are housed on the wall within it successively; Piston rod 9 is a hollow stem, and its upper end is provided with annular groove, is fixed with a bump rubber 6 by snap ring 12, and cylinder barrel 4 inwalls leave the space on bump rubber and the hydro-pneumatic spring, and upper portion side wall is provided with piston rod oilhole 9a; Be provided with delivery valve 10a, adjusting sleeve oilhole 10b in the lower end of adjusting sleeve 10, the outside, adjusting sleeve 10 top and bottom respectively is provided with annular boss, have groove on the boss lateral surface, the length of groove stretches into part in the adjusting sleeve 10 less than adjust bar 5, the degree of depth of groove is placed with the first adjusting sleeve seal ring 16a and the second adjusting sleeve seal ring 16b less than the wall thickness of adjust bar 5 in the groove; The lower end of adjust bar 5 is equipped with delivery valve 5c and is had adjust bar oilhole 5d, have draining hole 5b above the delivery valve 5c, on the lateral wall of the lower end of adjust bar 5, be milled with groove, thereby, make the lower end lateral wall of adjust bar 5 and be socketed between adjust bar 5 adjusting sleeve 10 inwalls outward and form induction channels 5a, and, it is consistent with the internal diameter of adjusting sleeve 10 that adjust bar 5 is socketed in the body of rod external diameter of the port section in the adjusting sleeve 10, adjust bar 5 on the induction channels 5a or under the body of rod external diameter of part be less than the internal diameter of adjusting sleeve 10, promptly refer between them, leave the gap;
Under state of nature, adjust bar (5) extend in first chamber (G) and the length between the top of adjusting sleeve (10) consistent with the length of second chamber (B).
As Fig. 2, Fig. 3, shown in Figure 4, it is the induction channels 5a that the center is symmetrically distributed with adjust bar 5 axis that the lower end sidewall of described adjust bar 5 is provided with 2, and its cross-sectional plane is a rectangle; It is the draining hole 5b that the center is symmetrically distributed with adjust bar 5 axis that the sidewall of adjust bar 5 is provided with 2, and its cross-sectional plane be a circle, is interconnected with the inner chamber of adjust bar 5; The lower end of adjust bar 5 is provided with a delivery valve 5c, and delivery valve 5c is a check valve, and delivery valve 5c control fluid flows into the second chamber B by the inner chamber of adjust bar 5; The lower end of adjust bar 5 is provided with 4 adjust bar oilhole 5d, and its cross-sectional plane is circular, and the fluid that is flowed out by adjust bar 5 inner chambers enters the second chamber B via adjust bar oilhole 5d.
As Fig. 5, shown in Figure 6, the lower end of described adjusting sleeve 10 is provided with a delivery valve 10a, and delivery valve 10a is a check valve, and delivery valve 10a control fluid flows into the 3rd chamber H by the second chamber B; The lower end of adjusting sleeve 10 is provided with 4 adjusting sleeve oilhole 10b, and its cross-sectional plane is circular, and the fluid that is flowed out by the second chamber B enters the 3rd chamber H via adjusting sleeve oilhole 10b.
Workflow of the present invention is divided three kinds of situations: 1. when bodywork height is low; 2. when vehicle body arrives ideal position; 3. when bodywork height is higher.
When bodywork height was low, when wheel was subjected to ground-surface excitation bob, the fluid circulation status as shown in Figure 7.When wheel was jumped down, adjusting sleeve 10 moved downward with respect to adjust bar 5, and the second chamber B volume increases, pressure reduces, delivery valve 5c opens, and fluid flows out from low pressure accumulator 2, via inner chamber, the delivery valve 5c of adjust bar 5, regulate oilhole 5d and enter the second chamber B; When jumping on the wheel, adjusting sleeve 10 is with respect to adjust bar 5 upward movements, and the second chamber B volume reduces, and delivery valve 10a is pushed open by fluid, fluid flows out from the second chamber B, enters the first chamber G via delivery valve 10a, adjusting sleeve oilhole 10b, the 3rd chamber H, piston rod oilhole 9a.By wheel crank motion up and down, fluid constantly flows into the first chamber G by low pressure accumulator 2, and piston rod (9) moves down with respect to cylinder barrel under the hydro-pneumatic spring, and vehicle body is raised gradually.
When vehicle body arrived ideal position, its view as shown in Figure 8.At this moment, the induction channels 5a on the adjust bar 5 and the first chamber G are interconnected, promptly the first chamber G and the second chamber B also are interconnected, when wheel is jumped down again, because of the first chamber G keeps communicating with high pressure accumulator always, pressure in the second chamber B is greater than the pressure in the low pressure accumulator, and fluid can't circulate between the low pressure accumulator 2 and the second chamber B, so bodywork height can not change.
When bodywork height was higher, its view as shown in Figure 9.At this moment, the draining hole 5b on the adjust bar (5) and the first chamber G are interconnected, be the low pressure accumulator 2 and the first chamber G mutual conduction, because the first chamber G keeps communicating with high pressure accumulator always, the pressure of fluid is higher among the first chamber G, therefore fluid reduces via the oil mass that draining hole 5b, adjust bar 5, low pressure accumulator interface 1a enter among low pressure accumulator 2, the first chamber G from the first chamber G, and bodywork height descends.
This full-automatic mechanical-type overall height is regulated hydro pneumatic suspension and is utilized ground-surface to be actuated to it power to be provided, to carry out the automatically regulating of overall height, owing to need not electronic control system, thus simple in structure, the reliability height, cost is low, has really accomplished multi-functional, zero-power, zero-emission.Simultaneously, has good thermal diffusivity because the dash pot valve of this kind structure and energy storage are taked externally.
Claims (8)
1. the full-automatic mechanical-type overall height is regulated hydro pneumatic suspension, comprise hydro-pneumatic spring upper bracket (1), high pressure accumulator (11), low pressure accumulator (2), dash pot valve (17), piston rod (9), adjusting sleeve (10), adjust bar (5), cylinder barrel on the hydro-pneumatic spring (4), cylinder barrel under the hydro-pneumatic spring (7), it is characterized in that: hydro-pneumatic spring upper bracket (1) left side middle-end is provided with low pressure accumulator interface (1a), the upper end is provided with high pressure accumulator interface (1b) in the right side, middle lower end is provided with adjust bar interface (1c), between hydro-pneumatic spring upper bracket (1) and first chamber (G), be provided with two passages and high pressure accumulator interface (1b), adjust bar interface (1c) communicates, and hydro-pneumatic spring upper bracket (1) inwall is provided with negative thread; Cylinder barrel on the hydro-pneumatic spring (4), upper end outer wall and lower end outer wall are provided with outside thread; Cylinder barrel under the hydro-pneumatic spring (7) upper end inwall is provided with negative thread; Piston rod (9) is a hollow stem, and its upper end is provided with annular groove, by snap ring (12) bump rubber (6) is fixed in the annular groove, and the sidewall on piston rod (9) top is provided with piston rod oilhole (9a); Be provided with delivery valve (10a), adjusting sleeve oilhole (10b) in the lower end of adjusting sleeve (10), the outside, adjusting sleeve (10) top and bottom respectively is provided with annular boss, have groove on the boss lateral surface, be placed with the first adjusting sleeve seal ring (16a) and the second adjusting sleeve seal ring (16b) in the groove; The lower end of adjust bar (5) is equipped with delivery valve (5c) and is had adjust bar oilhole (5d), have draining hole (5b) above the delivery valve (5c), on the lower end lateral wall of adjust bar (5), be milled with groove, thereby, make the lower end lateral wall of adjust bar (5) and be socketed between outer adjusting sleeve (10) inwall of adjust bar (5) and form induction channels (5a), and, it is consistent with the internal diameter of adjusting sleeve (10) that adjust bar (5) is socketed in the body of rod external diameter of the port section in the adjusting sleeve (10), adjust bar (5) induction channels (5a) go up or under the body of rod external diameter of part be less than the internal diameter of adjusting sleeve (10), promptly refer between them, leave the gap;
Its annexation is: low pressure accumulator (2) is by being communicated with the low pressure accumulator interface (1a) of hydro-pneumatic spring upper bracket (1); High pressure accumulator (11) is communicated with dash pot valve (17) by oil pipe; Dash pot valve (17) one ends are communicated with by oil pipe with high pressure accumulator (11), and the other end is communicated with high pressure accumulator interface (1b) on the hydro-pneumatic spring upper bracket (1); Cylinder barrel on the hydro-pneumatic spring (4) upper end extend into the interior socket of hydro-pneumatic spring upper bracket (1) and is connected, and the lower end extend into the interior socket of cylinder barrel under the hydro-pneumatic spring (7) and is connected; Cylinder barrel (4) and hydro-pneumatic spring upper bracket (1) three's inwall form first chamber (G) on cylinder barrel under the hydro-pneumatic spring (7), the hydro-pneumatic spring; Piston rod (9) is socketed in the cylinder barrel under the hydro-pneumatic spring (7) and slides up and down in first chamber (G) along the inwall of cylinder barrel under the hydro-pneumatic spring (7), adjusting sleeve (10) is socketed in the piston rod (9), the annular boss outside of its lower end, upper end is connected by adjusting sleeve seal ring and piston rod (9) inner seal, and the boss bottom of adjusting sleeve (10) upper end, the boss top of adjusting sleeve (10) lower end, adjusting sleeve (10) the part outside forms the 3rd chamber (H) with the inwall of piston rod (9), and adjusting sleeve (10) slides up and down along adjust bar (5) outer wall; Adjust bar (5) upper end is connected with adjust bar interface (1c) by the passage of hydro-pneumatic spring upper bracket (1), and the lower end extend in the adjusting sleeve (10), and adjust bar (5) and adjusting sleeve (10) form second chamber (B);
2. full-automatic mechanical-type overall height as claimed in claim 1 is regulated hydro pneumatic suspension, it is characterized in that: described adjust bar (5) is hollow stem.
3. full-automatic mechanical-type overall height as claimed in claim 1 is regulated hydro pneumatic suspension, and it is characterized in that: described high pressure accumulator (11), low pressure accumulator (2), dash pot valve (17) are external.
4. full-automatic mechanical-type overall height as claimed in claim 1 is regulated hydro pneumatic suspension, it is characterized in that: described induction channels (5a) and described draining hole (5b) are that the center is symmetrically distributed with adjust bar (5) axis, the length of adjust bar (5) groove stretches into the interior part of adjusting sleeve (10) less than adjust bar (5), and the degree of depth of groove is less than the wall thickness of adjust bar (5); Described delivery valve (5c) is a check valve, and delivery valve (5c) control fluid flows into second chamber (B) by the inner chamber of adjust bar (5) through described adjust bar oilhole (5d).
5. full-automatic mechanical-type overall height as claimed in claim 1 is regulated hydro pneumatic suspension, and it is characterized in that: described delivery valve (10a) is a check valve, and delivery valve (10a) control fluid flows into the 3rd chamber (H) by second chamber (B).
6. full-automatic mechanical-type overall height as claimed in claim 1 is regulated hydro pneumatic suspension, it is characterized in that: the top of cylinder barrel on the oil gas bullet (4) is fixed with upper limit position block (3) with hydro-pneumatic spring upper bracket (1) junction, cylinder barrel (4) on the oil gas bullet bottom with hydro-pneumatic spring under cylinder barrel (7) junction be fixed with lower position block (8).
7. full-automatic mechanical-type overall height as claimed in claim 1 is regulated hydro pneumatic suspension, and it is characterized in that: the inwall of cylinder barrel under the hydro-pneumatic spring (7) is equipped with first guidance tape (13a), obturator piston ring (14), second guidance tape (13b), dust ring (15) from top to bottom successively.
8. full-automatic mechanical-type overall height as claimed in claim 1 is regulated hydro pneumatic suspension, it is characterized in that: under state of nature, adjust bar (5) extend in first chamber (G) and the length between the top of adjusting sleeve (10) consistent with the length of second chamber (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010515934 CN101973197A (en) | 2010-10-15 | 2010-10-15 | Full-automatic mechanical vehicle height regulation oil-gas suspension frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010515934 CN101973197A (en) | 2010-10-15 | 2010-10-15 | Full-automatic mechanical vehicle height regulation oil-gas suspension frame |
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| CN101973197A true CN101973197A (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010515934 Pending CN101973197A (en) | 2010-10-15 | 2010-10-15 | Full-automatic mechanical vehicle height regulation oil-gas suspension frame |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103661746B (en) * | 2012-09-18 | 2018-04-10 | 株式会社昭和 | Two-wheeled height regulator for vehicle |
| CN111993853A (en) * | 2020-08-12 | 2020-11-27 | 内蒙古第一机械集团股份有限公司 | External electro-hydraulic combined type vehicle posture adjusting unit |
| CN112324723A (en) * | 2020-10-30 | 2021-02-05 | 杰锋汽车动力系统股份有限公司 | Bellows energy storage ware |
| CN113147298A (en) * | 2021-03-24 | 2021-07-23 | 江苏大学 | Multi-mode double-air-chamber oil-gas ISD suspension and working method thereof |
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| JPH10299815A (en) * | 1997-04-30 | 1998-11-13 | Mazda Motor Corp | Vehicular height adjusting device for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103661746B (en) * | 2012-09-18 | 2018-04-10 | 株式会社昭和 | Two-wheeled height regulator for vehicle |
| CN111993853A (en) * | 2020-08-12 | 2020-11-27 | 内蒙古第一机械集团股份有限公司 | External electro-hydraulic combined type vehicle posture adjusting unit |
| CN112324723A (en) * | 2020-10-30 | 2021-02-05 | 杰锋汽车动力系统股份有限公司 | Bellows energy storage ware |
| CN112324723B (en) * | 2020-10-30 | 2023-02-03 | 杰锋汽车动力系统股份有限公司 | Bellows energy storage ware |
| CN113147298A (en) * | 2021-03-24 | 2021-07-23 | 江苏大学 | Multi-mode double-air-chamber oil-gas ISD suspension and working method thereof |
| CN113147298B (en) * | 2021-03-24 | 2024-01-05 | 江苏大学 | Multi-mode double-air-chamber oil-gas ISD suspension and working method thereof |
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Application publication date: 20110216 |