CN215244215U - Independent oil-gas suspension system for semitrailer - Google Patents
Independent oil-gas suspension system for semitrailer Download PDFInfo
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- CN215244215U CN215244215U CN202121672611.2U CN202121672611U CN215244215U CN 215244215 U CN215244215 U CN 215244215U CN 202121672611 U CN202121672611 U CN 202121672611U CN 215244215 U CN215244215 U CN 215244215U
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Abstract
The utility model discloses an independent oil gas suspension system for a semitrailer, which comprises an oil gas suspension cylinder, an energy accumulator, a connecting oil pipe, an auxiliary frame, a link mechanism and an anti-torsion bar, wherein a rodless cavity of the oil gas suspension cylinder is connected with the energy accumulator through the connecting oil pipe, the cylinder bottom of the oil gas suspension cylinder is connected with the auxiliary frame, and a piston rod of the oil gas suspension cylinder is connected with a lower control arm of the link mechanism; the connecting rod mechanism is connected with the auxiliary frame, and the torsion bar is connected with the connecting rod mechanism. The utility model provides an independent oil gas suspension system for semitrailer compares in the not independent air suspension of gasbag formula and the not independent suspension of leaf spring formula has better performance, including better damping performance, better anti performance of heeling, better brake performance and better comfort performance.
Description
Technical Field
The utility model relates to an oil gas suspension technical field especially discloses an independent oil gas suspension system for semitrailer.
Background
A semitrailer is a vehicle in which the axle is placed behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and which is equipped with a coupling device that transmits horizontal and vertical forces to the towing vehicle. What current semi-trailer non-independent suspension adopted is that gasbag formula non-independent air suspension and leaf spring formula non-independent suspension, its technical shortcoming lies in:
1. when the left wheel and the right wheel bounce, the left wheel and the right wheel can be mutually connected, so that the carriage can shake leftwards and rightwards greatly, and the riding comfort is reduced.
2. The degree of freedom of the suspension is small due to the simple structure, and the control stability is poor.
In particular, the airbag type dependent air suspension has the following technical disadvantages:
1. the pressure of the air bag cannot be too large, so that the anti-rolling capability of the air bag is weak, and the lateral supporting capability of the air bag is insufficient when the vehicle turns.
2. The damping performance is relatively poor, the process of inflation and deflation is performed when the air bag is compressed and stretched, the air bag cannot adjust the air pressure in time when the vehicle bumps due to long inflation and deflation time, and the vibration of the carriage is relatively large.
3. The vibration of the air bag during braking can cause the uneven ground contact area of the tire during braking, and the braking distance is larger.
4. The arrangement of the airbag vibration reducer occupies a large space, the wheel base of two adjacent shafts is required to be not too compact, the length of the suspension is too long, so that the vehicle frame, the transmission shaft and the wire harness are correspondingly lengthened, the weight of the vehicle is increased, and meanwhile, the cost is increased.
Accordingly, the leaf spring type dependent suspension has the following technical disadvantages:
1. the dead weight is larger, the weight of the chassis is increased, and the oil consumption is increased.
2. Too much rigidity leads to poor damping performance and poor comfort.
3. The steel plates are suspended on both sides of the frame and do not provide good torsional resistance.
Therefore, the defects of the existing semi-trailer non-independent suspension are a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides an independent oil gas suspension system for semitrailer aims at solving the technical problem of the above-mentioned defect that current semitrailer non-independent suspension exists.
The utility model provides an independent oil gas suspension system for a semitrailer, which comprises an oil gas suspension cylinder, an energy accumulator, a connecting oil pipe, an auxiliary frame, a connecting rod mechanism and an anti-torsion bar, wherein a rodless cavity of the oil gas suspension cylinder is connected with the energy accumulator through the connecting oil pipe, the cylinder bottom of the oil gas suspension cylinder is connected with the auxiliary frame, and a piston rod of the oil gas suspension cylinder is connected with a lower control arm of the connecting rod mechanism; the connecting rod mechanism is connected with the auxiliary frame, and the torsion bar is connected with the connecting rod mechanism.
Furthermore, the connecting rod mechanism comprises an upper control arm, a lower control arm and a connecting arm connected between the upper control arm and the lower control arm, the lower control arm is connected with a piston rod of the oil-gas suspension cylinder, the joint between the lower control arm and the connecting arm is connected with the torsion bar, the free end of the upper control arm and the free end of the lower control arm are respectively connected with the auxiliary frame, and the connecting arm is connected with the wheels.
Furthermore, the energy accumulator comprises a high-pressure cavity and a low-pressure cavity, wherein a high-pressure end piston is arranged on the high-pressure cavity, and a low-pressure end piston is arranged on the low-pressure cavity.
Further, the high-pressure chamber and the low-pressure chamber are filled with nitrogen gas.
Further, the subframe is mounted to the frame.
Furthermore, the hydro-pneumatic suspension cylinder comprises a first hydro-pneumatic suspension cylinder and a second hydro-pneumatic suspension cylinder, the energy accumulator comprises a first energy accumulator and a second energy accumulator, the connecting oil pipe comprises a first connecting oil pipe and a second connecting oil pipe, the connecting rod mechanism comprises a first connecting mechanism and a second connecting mechanism, the first energy accumulator is connected with a rodless cavity of the first hydro-pneumatic suspension cylinder through the first connecting oil pipe, and the second energy accumulator is connected with a rodless cavity of the second hydro-pneumatic suspension cylinder through the second connecting oil pipe; the first connecting mechanism is connected with a piston rod of the first oil-gas suspension cylinder, and the second connecting mechanism is connected with a piston rod of the second oil-gas suspension cylinder.
Further, the first connecting mechanism and the second connecting mechanism are symmetrically arranged by taking the central axis of the auxiliary frame as a symmetry axis.
Furthermore, the link mechanism comprises a first link mechanism and a second link mechanism, the first link mechanism comprises a first upper control arm, a first lower control arm and a first connecting arm connected between the first upper control arm and the first lower control arm, and the first upper control arm, the first connecting arm, the first lower control arm and the auxiliary frame surround to form a four-link mechanism; the second link mechanism comprises a second upper control arm, a second lower control arm and a second connecting arm connected between the second upper control arm and the second lower control arm, and the second upper control arm, the second connecting arm, the second lower control arm and the auxiliary frame surround to form a four-link mechanism.
Furthermore, the one end of anti torsion bar is connected with the junction between first control arm and the first linking arm down, and the other end of anti torsion bar is connected with the junction between second control arm and the second linking arm down.
Further, the first lower control arm is connected with a piston rod of the first oil-gas suspension cylinder; the second lower control arm is connected with a piston rod of the second oil-gas suspension cylinder.
The utility model discloses the beneficial effect who gains does:
the utility model provides an independent oil gas suspension system for a semitrailer, which adopts an oil gas suspension cylinder, an energy accumulator, a connecting oil pipe, an auxiliary frame, a link mechanism and an anti-torsion bar, wherein a rodless cavity of the oil gas suspension cylinder is connected with the energy accumulator through the connecting oil pipe, the cylinder bottom of the oil gas suspension cylinder is connected with the auxiliary frame, and a piston rod of the oil gas suspension cylinder is connected with a lower control arm of the link mechanism; the connecting rod mechanism is connected with the auxiliary frame, and the torsion bar is connected with the connecting rod mechanism. The utility model provides an independent oil gas suspension system for semitrailer adopts independent suspension connecting rod structure, and left and right wheels can not be mutually involved, and the vibration of left and right tires is not influenced mutually, and the torsion bar can effectively restrain the tire from violently and greatly jumping; the combination of a piston type energy accumulator, an oil-gas suspension cylinder and a link mechanism and the combination of the link mechanism and an oil-gas spring which are special for an independent suspension are adopted, the characteristics of nonlinear rigidity and nonlinear damping of the oil-gas spring and the characteristics of no mutual influence of left wheels and right wheels of the independent suspension are integrated, the advantages of small integral frequency deviation of the oil-gas spring, strong bearing capacity, excellent vibration damping performance and short braking distance are achieved, and meanwhile, the anti-roll capability and the stability performance of the trailer in the case of uneven road surface enable the trailer to have higher comfort; compared with a gasbag-type dependent air suspension and a leaf spring-type dependent suspension, the suspension has better performances including better damping performance, better anti-roll performance, better braking performance and better comfort performance.
Drawings
FIG. 1 is a schematic connection diagram of an embodiment of an independent hydro-pneumatic suspension system for a semitrailer according to the present invention;
FIG. 2 is a schematic view of the working principle of an embodiment of the independent hydro-pneumatic suspension system for the semitrailer of the present invention;
figure 3 is a schematic diagram of the connection of the hydro-pneumatic suspension cylinder shown in figure 1 to one embodiment of an accumulator.
The reference numbers illustrate:
10. an oil gas suspension cylinder; 20. an accumulator; 30. connecting an oil pipe; 40. an auxiliary frame; 50. a link mechanism; 60. a torsion resistant bar; 51. an upper control arm; 52. a lower control arm; 53. a connecting arm; 70. A wheel; 23. a high pressure chamber; 24. a low pressure chamber; 231. a high pressure side piston; 241. a low pressure side piston; 80. a frame; 11. a first hydro-pneumatic suspension cylinder; 12. a second hydro-pneumatic suspension cylinder; 21. a first accumulator; 22. a second accumulator; 31. a first connecting oil pipe; 32. a second connecting oil pipe; 511. a first upper control arm; 521. a first lower control arm; 531. a first connecting arm; 512. A second upper control arm; 522. a second lower control arm; 532. a second connecting arm.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1 and fig. 2, a first embodiment of the present invention provides an independent hydro-pneumatic suspension system for a semitrailer, including a hydro-pneumatic suspension cylinder 10, an energy accumulator 20, a connecting oil pipe 30, a sub-frame 40, a link mechanism 50 and a torsion bar 60, wherein a rodless cavity of the hydro-pneumatic suspension cylinder 10 is connected to the energy accumulator 20 through the connecting oil pipe 30, a fixed end of the hydro-pneumatic suspension cylinder 10 is mounted on the sub-frame 40, and a piston rod of the hydro-pneumatic suspension cylinder 10 is connected to the link mechanism 50; the link mechanism 50 is connected to the subframe 40, and the torsion bar 60 is connected to the link mechanism 50. In this embodiment, the subframe 40 is mounted to the frame 80.
In the above-described structure, referring to fig. 1 and 2, in the independent hydro-pneumatic suspension system for a semitrailer according to the present embodiment, the link mechanism 50 includes an upper control arm 51, a lower control arm 52, and a connecting arm 53 connected between the upper control arm 51 and the lower control arm 52, the lower control arm 52 is connected to the piston rod of the hydro-pneumatic suspension cylinder 10, a joint between the lower control arm 52 and the connecting arm 53 is connected to the torsion bar 60, a free end of the upper control arm 51 and a free end of the lower control arm 52 are respectively connected to the subframe 40, and the connecting arm 53 is connected to the wheel 70. The independent oil-gas suspension system for the semi-trailer provided by the embodiment adopts an independent suspension connecting rod structure, the left wheel and the right wheel are not mutually connected, the vibration of the left wheel and the vibration of the right wheel are not mutually influenced, and the torsion bar 60 can effectively inhibit severe and large-amplitude jumping of the wheels; the piston type energy accumulator, the combination of the hydro-pneumatic suspension cylinder and the link mechanism and the combination of the link mechanism and the hydro-pneumatic spring which are special for the independent suspension are adopted, the characteristics of the non-linear rigidity and the non-linear damping of the hydro-pneumatic spring and the characteristics of the independent suspension that left wheels and right wheels are not affected by each other are integrated, the advantages of small integral deviation frequency, strong bearing capacity, excellent vibration damping performance and short braking distance of the hydro-pneumatic spring are achieved, and meanwhile, the trailer has higher comfort due to the anti-roll capability and the stability performance of the trailer in the case of passing through a rugged road surface
Preferably, referring to fig. 3, fig. 3 is a schematic diagram of the connection between the hydro-pneumatic suspension cylinder and the accumulator shown in fig. 1, in this embodiment, the accumulator 20 includes a high pressure chamber 23 and a low pressure chamber 24, a high pressure end piston 231 is disposed on the high pressure chamber 23, and a low pressure end piston 241 is disposed on the low pressure chamber 24. The high pressure chamber 23 and the low pressure chamber 24 are filled with nitrogen gas.
Further, referring to fig. 1 to 3, in the independent hydro-pneumatic suspension system for a semitrailer according to the present embodiment, the hydro-pneumatic suspension cylinder 10 includes a first hydro-pneumatic suspension cylinder 11 and a second hydro-pneumatic suspension cylinder 12, the accumulator 20 includes a first accumulator 21 and a second accumulator 22, the connecting oil pipe 30 includes a first connecting oil pipe 31 and a second connecting oil pipe 32, the link mechanism 50 includes a first connecting mechanism and a second connecting mechanism, the first accumulator 21 is connected to the rodless cavity of the first hydro-pneumatic suspension cylinder 11 through the first connecting oil pipe 31, and the second accumulator 22 is connected to the rodless cavity of the second hydro-pneumatic suspension cylinder 12 through the second connecting oil pipe 32; the first connecting mechanism is connected with the piston rod of the first hydro-pneumatic suspension cylinder 11, and the second connecting mechanism is connected with the piston rod of the second hydro-pneumatic suspension cylinder 12. The first connecting mechanism and the second connecting mechanism are arranged symmetrically with the central axis of the subframe 40 as the axis of symmetry. The link mechanism 50 includes a first link mechanism and a second link mechanism, the first link mechanism includes a first upper control arm 511, a first lower control arm 521, and a first connecting arm 531 connected between the first upper control arm 511 and the first lower control arm 521, the first upper control arm 511, the first connecting arm 531, the first lower control arm 521, and the subframe 40 surround to form a four-link mechanism; the second link mechanism includes a second upper control arm 512, a second lower control arm 522, and a second connecting arm 532 connected between the second upper control arm 512 and the second lower control arm 522, and the second upper control arm 512, the second connecting arm 532, the second lower control arm 522, and the subframe 40 surround to form a four-link mechanism. One end of the torsion bar 60 is connected to a connection between the first lower control arm 521 and the first connection arm 531, and the other end of the torsion bar 60 is connected to a connection between the second lower control arm 522 and the second connection arm 532. The first lower control arm 521 is connected with a piston rod of the first hydro-pneumatic suspension cylinder 11; the second lower control arm 522 is connected to the piston rod of the second hydro-pneumatic suspension cylinder 12.
As shown in fig. 1 to 3, the working principle of the independent hydro-pneumatic suspension system for a semitrailer provided by the present embodiment is as follows:
the energy accumulator 20 comprises a high-pressure cavity 23 and a low-pressure cavity 24, nitrogen is filled in the energy accumulator, and the moving stroke of the hydro-pneumatic suspension cylinder under the no-load and full-load states of the whole vehicle is controlled by the pressure of the pre-filled nitrogen.
When the load is small, the upper control arm 51 and the lower control arm 52 swing upwards by a small amplitude, the oil-gas suspension cylinder 10 compresses by a small amplitude, the hydraulic oil transfers the pressure to the energy accumulator 20 through the connecting oil pipe 30, at the moment, only the low-pressure end piston 241 in the energy accumulator 20 moves to a gas cavity, and the nitrogen absorbs the impact energy through compression; after the impact is finished, the nitrogen expands to push the low-pressure end piston 241 to extrude towards the middle, oil flows back to the oil-gas suspension cylinder 10, the oil-gas suspension cylinder 10 extends, and the upper control arm 51 and the lower control arm 52 swing downwards to the original position.
When the load is large, the upper control arm 51 and the lower control arm 52 swing upwards to a large extent, the oil-gas suspension cylinder 10 is compressed to a large extent, hydraulic oil transfers the pressure to the energy accumulator 20 through the connecting oil pipe 30, at the moment, after the piston 241 at the low-pressure end in the energy accumulator 20 moves to the limit position towards the gas cavity, the piston 231 at the high-pressure end moves towards the gas cavity, and nitrogen at the two ends absorbs impact energy through compression; after impact is finished, nitrogen expands to push pistons at two ends to extrude towards the middle, oil flows back to the oil-gas suspension cylinder 10, the oil-gas suspension cylinder 10 extends, and the upper control arm 51 and the lower control arm 52 swing downwards to the original position.
The independent oil-gas suspension system for the semitrailer that this embodiment provided compares in prior art, adopts oil-gas suspension jar, energy storage ware, connecting oil pipe, sub vehicle frame, link mechanism and torsion bar, and the rodless chamber of oil-gas suspension jar is connected with the energy storage ware through connecting oil pipe, and the stiff end of oil-gas suspension jar is installed at the cylinder bottom of the oil-gas suspension jar on the sub vehicle frame and is linked to each other with the sub vehicle frame, and the piston rod of oil-gas suspension jar is connected with link mechanism's lower control arm, and the torsion bar is connected with link mechanism. The independent oil-gas suspension system for the semi-trailer provided by the embodiment adopts an independent suspension connecting rod structure, the left wheel and the right wheel are not mutually connected, the vibration of the left wheel and the right wheel is not influenced mutually, and the torsion bar can effectively inhibit severe and large-amplitude jumping of the wheels; the combination of a piston type energy accumulator, an oil-gas suspension cylinder and a link mechanism and the combination of the link mechanism and an oil-gas spring which are special for an independent suspension are adopted, the characteristics of nonlinear rigidity and nonlinear damping of the oil-gas spring and the characteristics of no mutual influence of left wheels and right wheels of the independent suspension are integrated, the advantages of small integral frequency deviation of the oil-gas spring, strong bearing capacity, excellent vibration damping performance and short braking distance are achieved, and meanwhile, the anti-roll capability and the stability performance of the trailer in the case of uneven road surface enable the trailer to have higher comfort; compared with a gasbag-type dependent air suspension and a leaf spring-type dependent suspension, the suspension has better performances including better damping performance, better anti-roll performance, better braking performance and better comfort performance.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An independent oil-gas suspension system for a semi-trailer is characterized by comprising an oil-gas suspension cylinder (10), an energy accumulator (20), a connecting oil pipe (30), a subframe (40), a connecting rod mechanism (50) and a torsion bar (60), wherein a rodless cavity of the oil-gas suspension cylinder (10) is connected with the energy accumulator (20) through the connecting oil pipe (30), the cylinder bottom of the oil-gas suspension cylinder (10) is connected with the subframe (40), and a piston rod of the oil-gas suspension cylinder (10) is connected with a lower control arm (52) of the connecting rod mechanism (50); the connecting rod mechanism (50) is connected with the auxiliary frame (40), and the torsion resistant rod (60) is connected with the connecting rod mechanism (50).
2. The independent hydro-pneumatic suspension system for a semitrailer according to claim 1, wherein said linkage (50) comprises an upper control arm (51), a lower control arm (52), and a connecting arm (53) connected between said upper control arm (51) and said lower control arm (52), said lower control arm (52) being connected to a piston rod of said hydro-pneumatic suspension cylinder (10), a joint between said lower control arm (52) and said connecting arm (53) being connected to said torsion bar (60), a free end of said upper control arm (51) and a free end of said lower control arm (52) being connected to said subframe (40), respectively, and said connecting arm (53) being connected to a wheel (70).
3. The independent hydro-pneumatic suspension system of claim 2, wherein the accumulator (20) includes a high pressure chamber (23) and a low pressure chamber (24), the high pressure chamber (23) having a high pressure end piston (231) disposed thereon, the low pressure chamber (24) having a low pressure end piston (241) disposed thereon.
4. The independent hydro-pneumatic suspension system of claim 3 wherein the high pressure chamber (23) and the low pressure chamber (24) are filled with nitrogen.
5. The independent hydro-pneumatic suspension system for a semi-trailer of claim 2 wherein said subframe (40) is mounted to a frame (80).
6. The independent hydro-pneumatic suspension system for a semitrailer according to claim 1, wherein said hydro-pneumatic suspension cylinder (10) comprises a first hydro-pneumatic suspension cylinder (11) and a second hydro-pneumatic suspension cylinder (12), said accumulator (20) comprises a first accumulator (21) and a second accumulator (22), said connecting oil line (30) comprises a first connecting oil line (31) and a second connecting oil line (32), said linkage (50) comprises a first connecting mechanism and a second connecting mechanism, said first accumulator (21) is connected to the rodless chamber of said first hydro-pneumatic suspension cylinder (11) through said first connecting oil line (31), and said second accumulator (22) is connected to the rodless chamber of said second hydro-pneumatic suspension cylinder (12) through said second connecting oil line (32); the first connecting mechanism is connected with a piston rod of the first hydro-pneumatic suspension cylinder (11), and the second connecting mechanism is connected with a piston rod of the second hydro-pneumatic suspension cylinder (12).
7. The independent hydro-pneumatic suspension system for a semitrailer of claim 6 wherein said first and second linkages are symmetrically disposed about a central axis of said subframe (40).
8. The independent hydro-pneumatic suspension system for a semitrailer of claim 6, wherein said linkage (50) includes first and second linkages, said first linkage including a first upper control arm (511), a first lower control arm (521), and a first connecting arm (531) connected between said first upper control arm (511) and said first lower control arm (521), said first upper control arm (511), said first connecting arm (531), said first lower control arm (521), and said subframe (40) enclosing to form a four-bar linkage; the second link mechanism comprises a second upper control arm (512), a second lower control arm (522) and a second connecting arm (532) connected between the second upper control arm (512) and the second lower control arm (522), wherein the second upper control arm (512), the second connecting arm (532), the second lower control arm (522) and the auxiliary frame (40) surround to form a four-link mechanism.
9. The independent hydro-pneumatic suspension system for a semitrailer of claim 8, wherein one end of said torsion bar (60) is connected to the junction between said first lower control arm (521) and first connecting arm (531), and the other end of said torsion bar (60) is connected to the junction between said second lower control arm (522) and second connecting arm (532).
10. The independent hydro-pneumatic suspension system for a semitrailer of claim 9 wherein said first lower control arm (521) is connected to a piston rod of said first hydro-pneumatic suspension cylinder (11); the second lower control arm (522) is connected to the piston rod of the second hydro-pneumatic suspension cylinder (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121672611.2U CN215244215U (en) | 2021-07-21 | 2021-07-21 | Independent oil-gas suspension system for semitrailer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121672611.2U CN215244215U (en) | 2021-07-21 | 2021-07-21 | Independent oil-gas suspension system for semitrailer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114228426A (en) * | 2021-12-29 | 2022-03-25 | 临工集团济南重机有限公司 | Rear oil gas suspension assembly and vehicle |
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2021
- 2021-07-21 CN CN202121672611.2U patent/CN215244215U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114228426A (en) * | 2021-12-29 | 2022-03-25 | 临工集团济南重机有限公司 | Rear oil gas suspension assembly and vehicle |
| CN114228426B (en) * | 2021-12-29 | 2024-02-02 | 临工重机股份有限公司 | Rear hydro-pneumatic suspension assembly and vehicle |
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