CN109677228B - Gas-liquid-spring composite suspension device - Google Patents
Gas-liquid-spring composite suspension device Download PDFInfo
- Publication number
- CN109677228B CN109677228B CN201910069527.2A CN201910069527A CN109677228B CN 109677228 B CN109677228 B CN 109677228B CN 201910069527 A CN201910069527 A CN 201910069527A CN 109677228 B CN109677228 B CN 109677228B
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- hydraulic
- supporting seat
- hydraulic oil
- spring
- gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/40—Type of actuator
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention relates to the field of suspension devices of vehicles, in particular to a gas-liquid-spring composite suspension device. The hydraulic cylinders are filled with hydraulic oil and are connected with a hydraulic main pipeline through hydraulic hoses, electromagnetic valves are installed in the middle of the hydraulic hoses to control on-off, the hydraulic main pipeline is communicated to a hydraulic oil bin, a certain space is reserved above the hydraulic oil bin and is connected with a high-pressure gas cylinder, and air holes which are controlled by the electromagnetic valves to lead to the atmosphere are formed. And one end of a spring is arranged on a fixed seat hinged below the piston of the hydraulic cylinder, and the other end of the spring is fixedly connected through a sleeve. The electromagnetic valve which is communicated to the atmosphere above the hydraulic oil bin exhausts to the atmosphere and the high-pressure gas cylinder supplies gas to the hydraulic oil bin to actively control the up-and-down movement of the piston rod, so as to control the up-and-down movement of the mass center of the vehicle body. The invention adopts a gas-liquid-spring composite mode, realizes the directional movement of the piston rod by controlling the directional discharge of gas, and solves the problems of the adaptability of the complex road condition of the existing mobile platform and the lateral force possibly born by high-speed running.
Description
Technical Field
The invention relates to the field of suspension devices of vehicles, in particular to a gas-liquid-spring composite suspension device.
Background
The current vehicle suspensions in the market are basically divided into steel frame suspensions, hydraulic suspensions, spring suspensions, air suspensions and newly-appeared electromagnetic suspensions, one of the suspensions is generally equipped on a vehicle, and in recent years, the hydraulic suspensions and the air suspensions are widely applied. The hydraulic suspension and the air suspension have respective advantages and disadvantages, the hydraulic suspension has the advantages of high reliability and long service life, and the hydraulic suspension has the disadvantage of not high response speed; air suspension has the advantage of fast response, but is less durable. Whether the advantages of hydraulic suspension and air suspension can be combined to invent a novel composite suspension with quick response and high durability deserves further consideration.
After considering the principles of air suspension and hydraulic suspension in depth, the inventor proposes a gas-liquid composite suspension device. However, the invention adds a spring to the suspension device in consideration of the complex road conditions that a vehicle running at high speed may face on off-road and the lateral force that the entire wheel leg needs to bear, but the spring of the invention does not function as a conventional spring suspension, and the extension spring of the invention is not used for shock absorption or vibration damping but for increasing the response speed of the air suspension and resisting the lateral force that the vehicle wheel leg bears when the vehicle runs at high speed. Therefore, the invention provides a gas-liquid-spring composite suspension device, which aims to solve the problems of quick response and stability of a vehicle in a complex road condition and lateral force possibly born by a wheel leg in high-speed running.
Disclosure of Invention
The invention provides a gas-liquid-spring composite suspension device, which aims to solve the problem of adaptability to complex road conditions of the existing mobile platform and the problem of lateral force possibly borne by high-speed running.
The invention is realized by the following technical scheme: a gas-liquid-spring composite suspension device comprises a plurality of propulsion units, each propulsion unit comprises two wheels, the two wheels of one propulsion unit are connected through a wheel shaft, a support rod is arranged on the wheel shaft, the bottom of the support rod is rotationally matched with the wheel shaft, a lower support seat is fixed at the top of the support rod, at least three single-action hydraulic cylinders are arranged above the lower support seat, piston rods of the single-action hydraulic cylinders are hinged and matched with the lower support seat, cylinder bodies of the single-action hydraulic cylinders are hinged to the lower surface of the upper support seat, the single-action hydraulic cylinders are dispersed in an inverted cone shape and located between the lower support seat and the upper support seat, a hydraulic hose capable of penetrating through the upper support seat is communicated with a rodless cavity of each single-action hydraulic cylinder below the upper support seat, and a first electromagnetic valve is, all hydraulic hoses above an upper supporting seat are respectively connected to each branch pipe of the multi-way pipe, a main pipe of all the multi-way pipes is communicated with a hydraulic main pipeline, one end of the hydraulic main pipeline is of a closed structure, the other end of the hydraulic main pipeline is communicated with a hydraulic oil bin, a high-pressure gas cylinder is arranged on the hydraulic oil bin above hydraulic oil, the gas outlet end of the high-pressure gas cylinder is communicated with the inside of the hydraulic oil bin, a second electromagnetic valve is arranged on the gas outlet end of the high-pressure gas cylinder, an air compressor communicated with the inside of the high-pressure gas cylinder is arranged on the high-pressure gas cylinder, an opening pipe communicated with the inside of the hydraulic oil bin is arranged at the top of the hydraulic oil bin, a third electromagnetic valve is arranged on the opening pipe, a fixing sleeve is sleeved on the periphery of a single-action hydraulic cylinder below the upper, one end of the extension spring is fixedly connected with the inner edge of the bottom of the fixed sleeve, and the other end of the extension spring is fixedly connected with the lower supporting seat.
As a further improvement of the technical scheme of the invention, a dust cover is sleeved outside the fixed sleeve, the upper end of the dust cover is fixedly matched with the lower surface of the upper supporting seat, and the lower end of the dust cover is fixedly connected with the bottom of the fixed sleeve.
As a further improvement of the technical scheme of the invention, the lower surface of the upper supporting seat is provided with a distance meter.
The invention further provides a mobile platform which comprises the gas-liquid-spring composite suspension device, and each upper supporting seat is fixedly supported below the chassis.
The invention has the beneficial effects that:
(1) the air-liquid combination not only increases the reliability of the suspension, but also makes up for the instability of the air suspension and simultaneously makes up for the defect of slow response of the hydraulic suspension.
(2) The invention can effectively resist lateral force and increase the response speed of suspension by adding the spring structure, and increases the following capability of the wheel.
(3) The spring structure fully distributed along the circumferential direction can effectively resist the lateral force born by the wheel legs of the vehicle when the vehicle runs at high speed
(4) The selection of an extension spring has the effect of increasing the suspension response speed, essentially equivalently reducing the unsprung mass.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of the gas-liquid-spring composite suspension device according to the present invention.
Fig. 2 is a schematic structural view of the propulsion unit.
Fig. 3 is another schematic view of the propulsion unit (without the fixed sleeve).
Fig. 4 is a schematic view of the connection between the extension spring and the lower support seat.
Fig. 5 is a schematic view of the installation of the dust cover.
FIG. 6 is a schematic diagram of the mobile platform traveling on a rough road.
Fig. 7 is a schematic view of the mobile platform traveling on a plateau road surface.
In the figure: 1-wheel, 2-support rod, 3-lower support seat, 4-single-action hydraulic cylinder, 5-upper support seat, 6-hydraulic hose, 7-first electromagnetic valve, 8-multi-way pipe, 9-hydraulic main pipe, 10-hydraulic oil bin, 11-hydraulic oil, 12-high-pressure gas cylinder, 13-second electromagnetic valve, 14-air compressor, 15-third electromagnetic valve, 16-fixed sleeve, 17-extension spring, 18-dust cover, 19-chassis, 20-compressed air and 21-distance meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
A gas-liquid-spring composite suspension device comprises a plurality of propulsion units, each propulsion unit comprises two wheels 1, the two wheels 1 of one propulsion unit are connected through a wheel shaft, a support rod 2 is arranged on the wheel shaft, the bottom of the support rod 2 is in running fit with the wheel shaft, a lower support seat 3 is fixed at the top of the support rod 2, at least three single-action hydraulic cylinders 4 are arranged above the lower support seat 3, piston rods of the single-action hydraulic cylinders 4 are in hinged fit with the lower support seat 3, cylinder bodies of the single-action hydraulic cylinders 4 are hinged to the lower surface of an upper support seat 5, the single-action hydraulic cylinders 4 are dispersed in an inverted cone shape and are positioned between the lower support seat 3 and the upper support seat 5, a rodless cavity of each single-action hydraulic cylinder 4 below the upper support seat 5 is communicated with a hydraulic hose 6 capable of penetrating, a first electromagnetic valve 7 is installed on each hydraulic hose 6 in series, all the hydraulic hoses 6 above one upper supporting seat 5 are respectively connected to each branch pipe of the multi-way pipe 8, the main pipe of all the multi-way pipes 8 is communicated with a hydraulic main pipe 9, one end of the hydraulic main pipe 9 is of a closed structure, the other end of the hydraulic main pipe 9 is communicated with a hydraulic oil bin 10, a high-pressure gas cylinder 12 is installed on the hydraulic oil bin 10 above hydraulic oil 11, the gas outlet end of the high-pressure gas cylinder 12 is communicated with the inside of the hydraulic oil bin 10, a second electromagnetic valve 13 is installed on the gas outlet end of the high-pressure gas cylinder 12, an air compressor 14 communicated with the inside of the high-pressure gas cylinder 12 is installed on the high-pressure gas cylinder 12, an open pipe communicated with the inside of the hydraulic oil bin 10 is arranged at the top of the hydraulic oil bin 10, a third electromagnetic valve 15 is installed, the top of the fixed sleeve 16 is fixedly matched with the lower surface of the upper supporting seat 5, a plurality of extension springs 17 are arranged on the inner side of the bottom of the fixed sleeve 16 along the circumference, one end of each extension spring 17 is fixedly connected with the inner edge of the bottom of the fixed sleeve 16, and the other end of each extension spring 17 is fixedly connected with the lower supporting seat 3.
Preferably, a dust cover 18 is sleeved outside the fixing sleeve 16, the upper end of the dust cover 18 is fixedly matched with the lower surface of the upper supporting seat 5, and the lower end of the dust cover 18 is fixedly connected with the bottom of the fixing sleeve 16.
In specific implementation, the lower surface of the upper supporting seat 5 is provided with a distance measuring instrument 21.
The invention further provides a mobile platform comprising the air-liquid-spring composite suspension device, wherein each upper supporting seat 5 is fixedly supported below the chassis 19.
The specific working process is as follows, the second electromagnetic valve 13 and the third electromagnetic valve 15 are closed, the first electromagnetic valves 7 of all the propulsion units are opened, when the vehicle runs on a flat road, the compressed air 20 in the hydraulic oil bin 10 is compressed under the action of gravity, the mobile platform (vehicle) is equivalently suspended on the compressed air 20, when a small-amplitude bulge is encountered, the bulge jacks up a piston rod of the single-action hydraulic cylinder 4, namely the compressed air 20 is further compressed, the height of the vehicle body is unchanged, and the vibration damping effect is achieved; when a small depression is met, the piston rod of the single-acting hydraulic cylinder 4 moves downwards due to the dual action of gravity and the compressed air 20, so that the supporting force of the wheel 1 and the ground is not reduced, namely the power of the wheel 1 is not lost.
When the vehicle encounters a rugged road surface, the second electromagnetic valve 13 and the third electromagnetic valve 15 are closed, the first electromagnetic valves 7 of all the propulsion units are opened, for example, when the vehicle encounters a raised road surface, the hydraulic oil 11 of the propulsion units is extruded into other single-acting hydraulic cylinders 4 under the combined action of the projections and the extension springs 17, all the single-acting hydraulic cylinders 4 share the extruded hydraulic oil, and the vehicle body is kept stable; when the vehicle runs into a concave road surface, the piston rod of the single-action hydraulic cylinder 4 is extended under the combined action of gravity and the compressed air 20 in the hydraulic oil bin 10, the extension spring 17 is extended to form an inverted cone, the wheel 1 is not suspended but clings to the ground, and the situation that the wheel slips and the driving force is lost when a certain leg runs into the concave road surface is avoided.
When special road conditions such as a high platform are passed, the second electromagnetic valve 13 is opened, the third electromagnetic valve 15 is closed, all the first electromagnetic valves 7 are opened, the compressed air 20 in the high-pressure gas cylinder 12 extrudes the hydraulic oil 14 to do work, the piston rod of the single-action hydraulic cylinder 4 is pushed to move downwards, the whole chassis 19 of the moving platform is lifted, and the distance between the upper supporting seat 5 and the lower supporting seat 3 can be judged by the distance meter 21, so that the vehicle body lifting height is obtained. When the lifting set value is reached, the first electromagnetic valve 7 is closed, then the third electromagnetic valve 15 is opened to discharge a certain amount of air, the front propulsion unit simultaneously opens the first electromagnetic valve 7, the propulsion unit is lifted up under the action of the extension spring 17, the distance meter 21 can judge the distance between the upper supporting seat 5 and the lower supporting seat 3 so as to obtain the lifting height of the corresponding wheel 1, and when the wheel 1 is lifted to the set height, the first electromagnetic valve 7 at the front row is closed, and the first electromagnetic valve 7 at the next row of wheel legs is opened. The vehicle can pass through the high road condition by lifting the wheels row by row.
In order to prevent the special situation that when the wheels of the vehicle impact a raised barrier in the process of high-speed running, strong impact force can knock the propulsion unit to fly, the invention designs the extension spring 17 into a structure shown in figure 4, the extension spring 17 is in a dispersed structure in the process of running of the vehicle as shown in figure 1, and the dispersed extension spring 17 can absorb the energy of impact to limit the lower fixed seat 3 in a reasonable range so as not to knock the lower fixed seat when the vehicle runs in violent impact; meanwhile, due to the impact effect, the wheels 1 deviate from the advancing direction and the vehicle body action direction, the supporting shaft 2 forms a certain angle with the vertical direction, at the moment, the vehicle body drags the impacted wheels 1 to advance forwards, and the angle formed by the supporting shaft 2 and the vertical direction can enable the wheels 1 to be quickly adjusted to be consistent with the vehicle body direction due to the following principle. In the present invention, the high pressure gas cylinder 12 supplies gas to the hydraulic oil bin 10, and since the compressed air 20 is lost during the driving process, the air compressor 14 can supply gas to the high pressure gas cylinder 12 in order to make the compressed air 20 work on the hydraulic oil 14.
By analyzing the fact that the air quantity discharged in the air discharging process is smaller than the air quantity charged in the air compressor 14 in the non-air discharging process in the whole running process of the vehicle, the vehicle can normally work, so that the air supply device can work on a normal road surface for a long time, work on a special road surface for a short time, or work on the normal road surface and the special road surface alternately to ensure sufficient air supply quantity.
Considering the application of the present invention to high-pressure air supply, the air compressor 14 is an industrial grade high-pressure air compressor (e.g., bairi high-pressure compressor — BW300 high-pressure air compressor), the first solenoid valve 7 may be a common hydraulic solenoid valve, and the second solenoid valve 13 and the third solenoid valve 15 may be industrial dedicated high-pressure resistant normally closed solenoid valves (capable of stable operation under 100MPa pressure, such as hcnfo solenoid valve — ZCFK 51-DHBXS).
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (4)
1. The utility model provides a gas-liquid-spring composite suspension device, a serial communication port, including a plurality of propulsion unit, every propulsion unit all includes two wheels (1), link to each other through the shaft between two wheels (1) of a propulsion unit, the epaxial bracing piece (2) that is equipped with of wheel, bracing piece (2) bottom and shaft normal running fit, bracing piece (2) top is fixed with below supporting seat (3), below supporting seat (3) top is equipped with at least three single-action pneumatic cylinder (4), the piston rod of single-action pneumatic cylinder (4) and below supporting seat (3) articulated cooperation, the cylinder body of single-action pneumatic cylinder (4) articulates the lower surface in top supporting seat (5) jointly, each single-action pneumatic cylinder (4) are located between below supporting seat (3) and top supporting seat (5) that the back taper disperses jointly, all communicate on the no pole chamber of every single-action pneumatic cylinder (4) of a top supporting seat (5) below to have and can pass top supporting seat The hydraulic hose (6) of the supporting seat (5), each hydraulic hose (6) is provided with a first electromagnetic valve (7) in series, all the hydraulic hoses (6) above one upper supporting seat (5) are respectively connected to each branch pipe of the multi-way pipe (8), a main pipe of all the multi-way pipes (8) is communicated with a hydraulic main pipe (9), one end of the hydraulic main pipe (9) is of a closed structure, the other end of the hydraulic main pipe (9) is communicated with a hydraulic oil bin (10), a high-pressure gas cylinder (12) is arranged on the hydraulic oil bin (10) above hydraulic oil (11), the gas outlet end of the high-pressure gas cylinder (12) is communicated with the inside of the hydraulic oil bin (10), a second electromagnetic valve (13) is arranged on the gas outlet end of the high-pressure gas cylinder (12), an air compressor (14) communicated with the inside of the high-pressure gas cylinder (12) is arranged on the high-pressure gas cylinder (12), the top of the hydraulic oil bin (10) is provided, install third solenoid valve (15) on the opening pipe, the peripheral cover of single-action pneumatic cylinder (4) that is located top supporting seat (5) below is equipped with fixed sleeve (16), fixed sleeve (16) top and top supporting seat (5) lower fixed surface cooperation, a plurality of extension spring (17) are arranged along the circumference to fixed sleeve (16) bottom inboard, the one end and the fixed sleeve (16) bottom inner edge fixed connection of extension spring (17), the other one end and the below supporting seat (3) fixed connection of extension spring (17).
2. A combined gas-liquid-spring suspension device according to claim 1, characterized in that the fixed sleeve (16) is externally provided with a dust cover (18), the upper end of the dust cover (18) is fixedly engaged with the lower surface of the upper support base (5), and the lower end of the dust cover (18) is fixedly connected with the bottom of the fixed sleeve (16).
3. A combined gas-liquid-spring suspension as claimed in claim 1, wherein the lower surface of the upper support (5) is provided with a distance meter (21).
4. A mobile platform comprising a composite air-liquid-spring suspension as claimed in claim 1, 2 or 3, wherein each upper support (5) is fixedly supported below the chassis (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069527.2A CN109677228B (en) | 2019-01-24 | 2019-01-24 | Gas-liquid-spring composite suspension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069527.2A CN109677228B (en) | 2019-01-24 | 2019-01-24 | Gas-liquid-spring composite suspension device |
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| Publication Number | Publication Date |
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| CN109677228A CN109677228A (en) | 2019-04-26 |
| CN109677228B true CN109677228B (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910069527.2A Active CN109677228B (en) | 2019-01-24 | 2019-01-24 | Gas-liquid-spring composite suspension device |
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| CN (1) | CN109677228B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111088746A (en) * | 2019-12-12 | 2020-05-01 | 姚社红 | Automatic straightening and balancing mechanism for pavement cutting machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1135212A (en) * | 1964-12-09 | 1968-12-04 | Schmidt Karl Heinz | Wheel suspension |
| CN106114119A (en) * | 2016-07-04 | 2016-11-16 | 江苏大学 | A kind of dynamically bodywork height regulation system and method |
| CN108297640A (en) * | 2018-02-06 | 2018-07-20 | 中北大学 | A kind of intelligent control hydraulic lift hitch of the distributed more wheel mobile platforms of pure electric vehicle |
| CN108327470A (en) * | 2018-02-06 | 2018-07-27 | 中北大学 | A kind of distributed more wheel mobile platforms of the pure electric vehicle of intelligent control hydraulic lift hitch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2894062B2 (en) * | 1992-02-17 | 1999-05-24 | 株式会社日立製作所 | Body attitude control device |
-
2019
- 2019-01-24 CN CN201910069527.2A patent/CN109677228B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1135212A (en) * | 1964-12-09 | 1968-12-04 | Schmidt Karl Heinz | Wheel suspension |
| CN106114119A (en) * | 2016-07-04 | 2016-11-16 | 江苏大学 | A kind of dynamically bodywork height regulation system and method |
| CN108297640A (en) * | 2018-02-06 | 2018-07-20 | 中北大学 | A kind of intelligent control hydraulic lift hitch of the distributed more wheel mobile platforms of pure electric vehicle |
| CN108327470A (en) * | 2018-02-06 | 2018-07-27 | 中北大学 | A kind of distributed more wheel mobile platforms of the pure electric vehicle of intelligent control hydraulic lift hitch |
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| CN109677228A (en) | 2019-04-26 |
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