EP3585633A1 - Federungsvorrichtung - Google Patents
FederungsvorrichtungInfo
- Publication number
- EP3585633A1 EP3585633A1 EP18705577.7A EP18705577A EP3585633A1 EP 3585633 A1 EP3585633 A1 EP 3585633A1 EP 18705577 A EP18705577 A EP 18705577A EP 3585633 A1 EP3585633 A1 EP 3585633A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pressure
- suspension device
- suspension
- federungszyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/056—Regulating distributors or valves for hydropneumatic systems
- B60G17/0565—Height adjusting valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/265—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs hydraulic springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/30—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs having pressure fluid accumulator therefor, e.g. accumulator arranged in vehicle frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/056—Regulating distributors or valves for hydropneumatic systems
-
- 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
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/154—Fluid spring with an accumulator
-
- 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
- B60G2202/41—Fluid actuator
- B60G2202/414—Fluid actuator using electrohydraulic valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/08—Agricultural vehicles
- B60G2300/082—Tractors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
- B60G2500/302—Height or ground clearance using distributor valves
Definitions
- the invention relates to a suspension device, in particular for axle suspensions in tractors, with at least one suspension cylinder, the Ko I be n-S ta n e i n h e i t within a cylinder housing a piston side separated from a ring side.
- WO 2006/021327 A1 discloses a suspension device, in particular for vehicles with changing load conditions, with at least one suspension cylinder, each of which has pressure chambers, such as an annular space as a ring side and a piston as a piston side,
- the pressure control valve is electrically actuated by means of a control device.
- a h yd ropneumatische suspension is also known with at least one Federungszyl indians and at least one suspension accumulator, in particular hydraulic accumulator, and with a controllable valve, in particular proportional valve, for releasing or blocking a fluid-carrying connection between Federungszyl indians and suspension storage.
- the controllable, in particular pilot operated, valve can be brought into the closed position by means of a hydraulic control device, electrical actuating solutions are completely avoided and a secure, exclusive hydraulic actuation of the pilot operated valve for the valve takes place Switching on and switching off the respective spring suspension of the hydropneumatic suspension on the piston side.
- axle suspensions in particular in the case of tractors, operate according to the known principle of the ring-side return operation to reduce the pressure ratio the piston side compared to the load ratio.
- By a variable pressure on the ring side you can increase the allowable load ratio and / or produce different spring characteristics (adaptive axle suspension).
- the invention has the object, a proportional Druckeinstel ment on the ring side of a Federungszyl indians in an axle suspension is to implement real, which is reliable in operation and with low cost components feasible.
- the device is an inverse proportional pressure-limiting valve which, when de-energized, carries out the maximum pressure limitation on the ring side of the respective suspension cylinder and flows therethrough To limit pressure on the ring side of the suspension cylinder stages los set lt.
- the inverse proportional pressure relief valve excellent drive characteristics and stability for the respective Federungszyl is obtained over the entire volume flow range.
- a correspondingly optimized flow geometry results in low pressure losses with high response dynamics, and it is possible to set the valve over the entire volume of flow in accordance with the specifications.
- the fact that in the de-energized state of the valve, the default lte highest pressure anl attached, a fail-safe function is real DOM.
- the inverse proportional pressure relief valve limits the pressure to the maximum possible pressure settings and thus serves as the maximum pressure limit for the ring side of the respective spring cylinder.
- said valve is actuated in an electroproportional manner to the desired pressure and, if appropriate, oil is supplied to or removed from the ring side by incorporating an additional valve device so that the ring-side pressure is set to the desired value lbar is.
- an N iveauregul tion is connected to the piston side of each respective suspension cylinder.
- the N level regulation has particularly preferred two electro-magnetically operable valves, of which preferably a 3/2-way valve lifting and a preferably connected between the 3/2-way valve and the piston side of the Federungszyl inder 2/2-way valve the Lowering the respective spring Cyl inder serves.
- a system is created with which the associated vehicle can also be kept, raised or lowered in height in the form of a working machine, such as a tractor.
- the vehicle level can be kept constant at different loading conditions, regardless of changing loading conditions.
- Such is the optimum ground clearance and a horizontal position of the motor vehicle in each operating condition.
- Such a vehicle lift also makes it possible to drive over obstacles, or to lower them while driving under them.
- a shutter or throttle is connected in the supply line.
- the pertinent aperture or throttle can also be realized by a nozzle and serves as a total flow limiting in this area.
- 1 shows the essential components of a first embodiment of the suspension device according to the invention
- 2 shows a second, further embodiment comparable to the illustration according to FIG. 1.
- Fig. 1 shows a first embodiment of the suspension device in the manner of a hydraulic circuit diagram with its essential functional components.
- the suspension device is particularly suitable for axle suspensions in working machines such as tractors; but basically it can be used for all kinds of agricultural machinery, construction machinery and special vehicles.
- Fig. 1 is exemplified only a Federungszyl inder 1 0 dargestel lt; but it is self-evident that several such Federungszyl indians are used for a reliable axle suspension, preferably two suspension cylinders are provided for an axis of the machine.
- the respective suspension cylin 1 0 can be attached to a wheel set or the like with its piston rod unit 1 2 both on its ring or rod side 14 and on its piston side 18, taking into account the respective cylinder housing 20.
- its proportional pressure setting for its ring side 1 4 is shown, and on the right side as block 22 its level regulation, which is optional; i.e. is not required for the proportional pressure setting per se.
- a pressure beg nzun gs ve nti I 26 connected via a connecting line 24 in the form of a so-called.
- the valve which is only briefly referred to below as the pressure limiting valve 26 is connected to a tank T at the outlet side at its connection point 2 in a fluid-discharging manner and the input side connected via its junction 1 to a crossing point 28, in which the connecting line 24 opens.
- the main piston (not shown) of the valve opens and oil flows in the direction of the tank-side connection point 2.
- the u limiting pressure for the ring side 1 4 of the respective Federungszyl inder 1 0 stages can be controlled los.
- the valve 26 is, as already stated, inversely controlled, i. at a Steuerstromverring réelle the valve 26 is controlled and at the junction 1, a back pressure is generated. When energized, the highest pre-set pressure at the valve 26 will then be present, which allows the realization of a so-called fail-safe function. The maximum pressure can be pre-set in such valves so far.
- a directly controlled, inverse proportional pressure relief valve 26 in the seat design and in the manner of a fin-neck valve is available from the holder of the industrial property rights under the order no. PDBM06020Z.
- the level control 22 has two electro-magnetically actuated valves 34, 36, of which the valve 34 is designed as a 3/2-way valve designed to lift the Federungszyl inder and the other valve 36 is formed as a 2/2-way valve and serves
- the pertinent structure of a N iveauregul tion 22 is shown in the prior art, so that at this Stel le this will not be discussed in more detail.
- the valve 34 is on its in- gangseite connected to a pressure supply P and to the tank T.
- a hydraulic accumulator 38 of conventional design is connected to the further connecting line 32, which determines the damper cage on the piston side 1 8 of the suspension cylinder 10.
- the damping characteristic on the ring side 14 of the Federungszyl inder 1 0 is given by a further hydraulic accumulator 40 übl icher type, which is connected with its fluid side to the intersection point 28. Viewed in Bl thickening direction on the Fig.
- an electro-magnetically actuated 2/2-way valve 46 is connected in the line 42, shown in the un actuated state, the pressure supply P, which is connected to the supply line 42, from the ring side 14 of the Federungszyl inder 10 separates.
- the pertinent fluid supply is released, in which case the two switched into the supply line 42 check valve 48 and 50 open accordingly.
- the pressure supply P can take place via a common pressure source, such as a constant-flow hydraulic pump or the like.
- the discharged pressure can correspond to the maximum pressure of the hydraulic pump.
- the proportional proportional pressure relief valve 26 limits the pressure to the maximum possible pressure setting and thus serves as a fail-safe device of the maximum pressure limit on the ring side 14 of the suspension cylinder 10.
- the valve 26 is electro-proportionally driven to the desired pressure and via the valves 34 of the level control 22 oil can be added or removed, so as to adjust or regulate the ring-side pressure to the desired value. If the level regulation 22 is omitted, the fluid supply for the ring side 14 of the respective suspension cylinder 10 can only take place via the pressure supply P via the supply line 42.
- a corresponding sensor for a function control of the overall system, a corresponding sensor must be present, for example, detects the position of the suspension cylinder 10 and / or determines the individual pressure values in the system. Depending on the movement and / or pressure situation, the control of the respective valves then takes place via a higher-level machine or vehicle control. Since pertinent control systems and sensor technology are commonplace in practice, further details are not discussed.
- the embodiment of Figure 2 differs from the solution according to the Fig.1, as in the pressure supply for the ring side 14 of the respective suspension cylinder 10 instead of the 2/2-way valve 46 after the Fig. 1, a 3/2-way valve 56 is connected, which blocks the pressure supply P in the shown, non-actuated or non-switched state and otherwise another load-Sens i ng-Leitu ng LS, in the supply line 42 between the valve 56 and Check valve 50 opens, depressurized to the tank side T out. When the valve is actuated, the connection to the tank T is blocked and the pressure supply P is connected to the supply line 42 in a pressure-sensitive manner. Otherwise, the functional sequence for the solution according to FIG. 2 is exactly as described above for the first embodiment.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017001653.4A DE102017001653A1 (de) | 2017-02-21 | 2017-02-21 | Federungsvorrichtung |
| PCT/EP2018/053106 WO2018153677A1 (de) | 2017-02-21 | 2018-02-07 | Federungsvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3585633A1 true EP3585633A1 (de) | 2020-01-01 |
Family
ID=61231230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18705577.7A Withdrawn EP3585633A1 (de) | 2017-02-21 | 2018-02-07 | Federungsvorrichtung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20200009936A1 (de) |
| EP (1) | EP3585633A1 (de) |
| DE (1) | DE102017001653A1 (de) |
| WO (1) | WO2018153677A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019001855A1 (de) * | 2019-03-15 | 2020-09-17 | Hydac Mobilhydraulik Gmbh | Feder-Dämpfer-System |
| CN113119675B (zh) * | 2021-04-08 | 2025-04-22 | 成都立航科技股份有限公司 | 一种多轮组悬挂控制系统 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6575484B2 (en) * | 2001-07-20 | 2003-06-10 | Husco International, Inc. | Dual mode regenerative suspension for an off-road vehicle |
| DE10216132A1 (de) * | 2002-04-12 | 2003-10-23 | Bayerische Motoren Werke Ag | Aktives Fahrwerksystem eines Fahrzeugs |
| DE10252729A1 (de) * | 2002-11-13 | 2004-06-03 | Hydac Technology Gmbh | Hydropneumatische Federung |
| DE10306756B4 (de) * | 2003-02-17 | 2007-01-04 | Carl Freudenberg Kg | Hydropneumatische Federungseinrichtung für Fahrzeuge |
| DE10337600A1 (de) * | 2003-08-16 | 2005-03-10 | Deere & Co | Hydropneumatische Federungseinrichtung |
| DE102004040636A1 (de) * | 2004-08-21 | 2006-02-23 | Hydac System Gmbh | Federungsvorrichtung |
| DE102005003833B3 (de) * | 2005-01-27 | 2006-06-01 | Hydac System Gmbh | Fahrbare Arbeitsmaschine |
| EP1862338A1 (de) * | 2006-05-29 | 2007-12-05 | Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO | Fahrzeugaufhängungssystem |
-
2017
- 2017-02-21 DE DE102017001653.4A patent/DE102017001653A1/de not_active Withdrawn
-
2018
- 2018-02-07 WO PCT/EP2018/053106 patent/WO2018153677A1/de not_active Ceased
- 2018-02-07 US US16/486,881 patent/US20200009936A1/en not_active Abandoned
- 2018-02-07 EP EP18705577.7A patent/EP3585633A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US20200009936A1 (en) | 2020-01-09 |
| WO2018153677A1 (de) | 2018-08-30 |
| DE102017001653A1 (de) | 2018-08-23 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 18D | Application deemed to be withdrawn |
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