DE1297491B - Multi-axle suspension for commercial vehicles with a driven rear axle and at least one trailing rear axle - Google Patents

Multi-axle suspension for commercial vehicles with a driven rear axle and at least one trailing rear axle

Info

Publication number
DE1297491B
DE1297491B DED50223A DED0050223A DE1297491B DE 1297491 B DE1297491 B DE 1297491B DE D50223 A DED50223 A DE D50223A DE D0050223 A DED0050223 A DE D0050223A DE 1297491 B DE1297491 B DE 1297491B
Authority
DE
Germany
Prior art keywords
rear axle
pressure
axle
trailing
driven
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.)
Pending
Application number
DED50223A
Other languages
German (de)
Inventor
Dipl-Ing Gerhard
Schrimpf Hermann
Wolters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Priority to DED50223A priority Critical patent/DE1297491B/en
Priority to FR108169A priority patent/FR1524738A/en
Priority to GB2487367A priority patent/GB1122358A/en
Publication of DE1297491B publication Critical patent/DE1297491B/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D61/00—Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern
    • B62D61/12—Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern with variable number of ground engaging wheels, e.g. with some wheels arranged higher than others, or with retractable wheels
    • B62D61/125—Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern with variable number of ground engaging wheels, e.g. with some wheels arranged higher than others, or with retractable wheels the retractable wheel being a part of a set of tandem wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
    • B60G11/34—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs
    • B60G11/46—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also fluid springs
    • 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
    • B60G17/052—Pneumatic spring characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G5/00—Resilient suspensions for a set of tandem wheels or axles having interrelated movements
    • B60G5/04—Resilient suspensions for a set of tandem wheels or axles having interrelated movements with two or more pivoted arms, the movements of which are resiliently interrelated, e.g. the arms being rigid
    • B60G5/047—Resilient suspensions for a set of tandem wheels or axles having interrelated movements with two or more pivoted arms, the movements of which are resiliently interrelated, e.g. the arms being rigid at least one arm being resilient, e.g. a leafspring

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Vehicle Body Suspensions (AREA)

Description

Die Erfindung betrifft eine Mehrachsfederung für Nutzkraftfahrzeuge mit einer angetriebenen Hinterachse und mindestens einer Nachlauf-Hinterachse, bei denen diese Hinterachsen unabhängig voneinander durch Blattfedern gegenüber dem Fahrgestellrahmen abgefedert und geführt sind.The invention relates to a multi-axle suspension for commercial vehicles with a driven rear axle and at least one trailing rear axle, in which these rear axles are independent of one another are cushioned and guided by leaf springs relative to the chassis frame.

Bei Nutzkraftfahrzeugen mit einer angetriebenen Hinterachse und mindestens einer Nachlauf-Hinterachse kann bei leerem oder nur teilweise beladenem Fahrzeug der Fall eintreten, daß die angetriebene Hinterachse nur so niedrig belastet ist, daß unter ungünstigen Bedingungen, z. B. beim Befahren starker Steigungen oder vereister Straßen, keine einwandfreie Übertragung der Antriebskraft auf die Fahrbahn möglich ist.For commercial vehicles with a driven rear axle and at least one trailing rear axle it can happen with an empty or only partially loaded vehicle that the driven Rear axle is loaded only so low that under unfavorable conditions, z. B. when driving stronger Inclines or icy roads, impeccable transmission of the driving force to the road surface is not possible is.

In der deutschen Patentschrift 1157 942 und der USA.-Patentschrift 3 094 341 sind bereits Nutzkraftfahrzeuge beschrieben, bei denen eine angetriebene Hinterachse durch Blattfedern und eine Nachlauf-Hinterachse durch Luftfedern gegenüber dem Fahr- ao gestellrahmen abgefedert sind, wobei der Druck in den Luftfedern in Abhängigkeit von der Belastung der angetriebenen Hinterachse geregelt wird.German patent specification 1157 942 and USA patent specification 3,094,341 already mention commercial vehicles described in which a driven rear axle by leaf springs and a trailing rear axle are cushioned by air springs in relation to the chassis, whereby the pressure in the air springs is controlled depending on the load on the driven rear axle.

Bei einer derartigen Anordnung kann aber die Belastung der Nachlauf-Hinterachse nur bis zu deren Eigengewicht verringert werden, was keine optimale Lösung der gestellten Aufgabe bedeutet.With such an arrangement, however, the load on the trailing rear axle can only be up to its Dead weight can be reduced, which does not mean an optimal solution to the task at hand.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Federung für Nutzkraftfahrzeuge der eingangs beschriebenen Art zu schaffen, bei der bei leerem oder nur zum Teil beladenem Fahrzeug eine Entlastung der Nachlauf-Hinterachse auch ganz oder teilweise von ihrem Eigengewicht möglich ist, so daß im Extremfall die Räder dieser Achse überhaupt keinen Druck mehr auf die Fahrbahn ausüben.The invention is therefore based on the object of providing a suspension for commercial vehicles of the initially introduced to create described type, in the case of an empty or only partially loaded vehicle a relief the trailing rear axle is also wholly or partially possible from its own weight, so that in In an extreme case, the wheels of this axle no longer exert any pressure on the roadway.

Diese Aufgabe wird bei einer Mehrachs-Federung für Nutzkraftfahrzeuge mit einer angetriebenen Hinterachse und mindestens einer Nachlauf-Hinterachse, bei denen diese Hinterachsen unabhängig voneinander durch Blattfedern gegenüber dem Fahrgestellrahmen abgefedert und geführt sind, dadurch gelöst, daß die Blattfedern der Nachlauf-Hinterachse so ausgelegt sind, daß sie bei leerem Fahrzeug im Stand eine nach oben gerichtete Federkraft auf die Nachlauf-Hinterachse ausüben und daß an der Nachlauf-Hinterachse zusätzlich zu den Blattfedern an jeder Seite des Fahrzeugs eine Luftfeder vorgesehen ist, deren Druck in an sich bekannter Weise in Abhängigkeit von der Belastung der angetriebenen Hinterachse gesteuert wird.This task is driven with a multi-axle suspension for commercial vehicles Rear axle and at least one trailing rear axle, in which these rear axles are independent of each other are cushioned and guided by leaf springs relative to the chassis frame, thereby solved that the leaf springs of the trailing rear axle are designed so that they are in the empty vehicle Stand an upward spring force on the trailing rear axle and that on the trailing rear axle In addition to the leaf springs, an air spring is provided on each side of the vehicle is whose pressure in a known manner as a function of the load on the driven Rear axle is controlled.

Es ist dabei vorteilhaft, wenn die Steuerung des Druckes in den Luftfedern auf zwei Wegen über ein selbsttätiges Umschaltventil erfolgt, das jeweils den Weg mit dem höheren Druck mit den Luftfedern verbindet, wobei der Druck in dem einen Weg durch ein in Abhängigkeit von der Belastung der angetriebenen Hinterachse gesteuertes Druckregelventil und der Druck in dem anderen Weg durch ein auf den für die Luftfedern vorgeschriebenen Mindestdruck eingestelltes Druckminderventil bestimmt wird.It is advantageous if the pressure in the air springs is controlled in two ways via one Automatic switchover valve takes place, which takes the path with the higher pressure with the air springs connects, the pressure in the one way through one depending on the load of the driven Rear axle controlled pressure control valve and the pressure in the other way through a on the for the air springs prescribed minimum pressure is determined.

Die Mehrachs-Federung nach der Erfindung soll im folgenden an Hand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert werden. In den Zeichnungen zeigtThe multi-axle suspension according to the invention is to be shown in the following with reference to one in the drawings Exemplary embodiment will be explained in more detail. In the drawings shows

F i g. 1 eine Seitenansicht einer Doppelachs-Anordnung mit zusätzlicher Luftfeder an der Nachlauf-Hinterachse undF i g. 1 is a side view of a double-axle arrangement with additional air springs on the trailing rear axle and

Fig. 2 eine schematische Darstellung des Regelkreises eine Luftfeder gemäß vorliegender Erfindung. Fig. 2 is a schematic representation of the control loop of an air spring according to the present invention.

Eine angetriebene Hinterachsel ist durch Blattfedern 2 und eine Nachlauf-Hinterachse 3 durch Blattfedern 4 gegenüber einem Fahrgestellrahmen 5 abgefedert. Zwischen Nachlauf-Hinterachse 3 und Fahrgestellrahmen 5 ist auf jeder Seite des Fahrzeugs zusätzlich eine Luftfeder 6 angeordnet. Die Blattfedern 4 der Nachlauf-Hinterachse 3 sollen dabei so ausgelegt sein, daß sie bei leerem Fahrzeug im Stand eine nach oben gerichtete Federkraft auf die Nachlauf-Hinterachse ausüben.A rear axle is driven by leaf springs 2 and a trailing rear axle 3 by leaf springs 4 opposite a chassis frame 5 cushioned. Between the trailing rear axle 3 and the chassis frame 5 is on each side of the vehicle an air spring 6 is also arranged. The leaf springs 4 of the trailing rear axle 3 should be like this be designed so that when the vehicle is empty, an upward spring force is exerted on the trailing rear axle exercise.

In dem in F i g. 2 schematisch dargestellten Regelkreis führt von einem Druckluftbehälter 7 eine Leitung über ein Druckminderventil 8 und eine andere Leitung über ein in Abhängigkeit von der Belastung der angetriebenen Hinterachsel gesteuertes Druckregelventil 9 zu einem selbsttätigen Umschaltventil 10, das über eine weitere Leitung mit den Luftfedern 6 in Verbindung steht.In the one shown in FIG. 2 schematically illustrated control circuit leads from a compressed air tank 7 a line Via a pressure reducing valve 8 and another line via a depending on the load the driven rear axle controlled pressure control valve 9 to an automatic switching valve 10, which is connected to the air springs via another line 6 communicates.

Das Umschaltventil 10 verbindet jeweils die Leitung mit der Leitung zu den Luftfedern 6, in der der höhere Druck herrscht.The switching valve 10 each connects the line with the line to the air springs 6, in which the higher pressure prevails.

Das Druckminderventile soll so eingestellt sein, daß es dem Umschaltventil 10 immer den für die Luftfedern 6 vorgeschriebenen Mindestdruck, z. B. 0,8 atü (Atmosphärenüberdruck), zuleitet.The pressure reducing valve should be set so that that it is the switching valve 10 always the prescribed minimum pressure for the air springs 6, z. B. 0.8 atü (atmospheric pressure).

Das in Abhängigkeit von der Belastung der angetriebenen Hinterachse 1 gesteuerte Druckregelventil 9 leitet dem Umschaltventil 10 bei voll ausgelasteter Hinterachse 1 z. B. einen Druck von 6 atü und bei nur durch das anteilige Fahrzeugeigengewicht belasteter Hinterachse 1 z. B. einen Druck von 0 atü zu.The pressure regulating valve 9 controlled as a function of the load on the driven rear axle 1 directs the switching valve 10 when the rear axle 1 is fully utilized z. B. a pressure of 6 atmospheres and at rear axle 1 z. B. to a pressure of 0 atm.

Solange das Umschaltventil 10 vom Druckregelventil 9 mit einem Druck beaufschlagt wird, der höher ist als 0,8 atü, wird also bei den im dargestellten Beispiel angeführten Drücken das Druckregelventil 9 über das Umschaltventil 10 mit den Luftfedern 6 verbunden sein. Bei einem Absinken des vom Druckregelventil 9 gelieferten Druckes unter 0,8 atü wird diese Verbindung unterbrochen und das Druckminderventil 8 mit den Luftfedern 6 verbunden, so daß sichergestellt ist, daß in den Luftfedern 6 immer der vorgeschriebene Mindestdruck aufrechterhalten wird.As long as the switching valve 10 is acted upon by the pressure control valve 9 with a pressure that is higher than 0.8 atm, so the pressure control valve will be at the pressures shown in the example shown 9 can be connected to the air springs 6 via the switching valve 10. If the the pressure supplied by the pressure control valve 9 below 0.8 atmospheres, this connection is interrupted and the pressure reducing valve 8 is connected to the air springs 6, so that it is ensured that in the air springs 6 the prescribed minimum pressure is always maintained.

Claims (2)

Patentansprüche:Patent claims: 1. Mehrachs-Federung für Nutzkraftfahrzeuge mit einer angetriebenen Hinterachse und mindestens einer Nachlauf-Hinterachse, bei denen diese Hinterachsen unabhängig voneinander durch Blattfedern gegenüber dem Fahrgestellrahmen abgefedert und geführt sind, dadurch gekennzeichnet, daß die Blattfedern (4) der Nachlauf-Hinterachse (3) so ausgelegt sind, daß sie bei leerem Fahrzeug im Stand eine nach oben gerichtete Federkraft auf die Nachlauf-Hinterachse (3) ausüben und daß an der Nachlauf-Hinterachse (3) zusätzlich zu den Blattfedern (4) an jeder Seite des Fahrzeugs eine Luftfeder (6) vorgesehen ist, deren Druck in an sich bekannter Weise in Abhängigkeit von der Belastung der angetriebenen Hinterachse (1) gesteuert wird.1. Multi-axle suspension for commercial vehicles with a driven rear axle and at least a trailing rear axle, in which these rear axles operate independently of each other Leaf springs are sprung and guided in relation to the chassis frame, characterized in that that the leaf springs (4) of the trailing rear axle (3) are designed so that they are at an upward spring force on the trailing rear axle (3) when the vehicle is idle exercise and that on the trailing rear axle (3) in addition to the leaf springs (4) on each Side of the vehicle an air spring (6) is provided, the pressure of which in a known manner in Depending on the load on the driven rear axle (1) is controlled. 2. Mehrachs-Federung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuerung des2. Multi-axle suspension according to claim 1, characterized in that the control of the Druckes in den Luftfedern (6) auf zwei Wegen über ein selbsttätiges Umschaltventil (10) erfolgt, das jeweils den Weg mit dem höheren Druck mit den Luftfedern (6) verbindet, wobei der Druck in dem einen Weg durch ein in Abhängigkeit von der Belastung der angetriebenen Hinterachse (1) gesteuertes Druckregelventil (9) und der Druck in dem anderen Weg durch ein auf den für die Luftfedern (6) vorgeschriebenen Mindestdruck eingestelltes Druckminderventil (8) bestimmt wird.Pressure in the air springs (6) takes place in two ways via an automatic switching valve (10), which connects the path with the higher pressure with the air springs (6), the pressure in one way through one depending on the load on the driven rear axle (1) controlled pressure regulating valve (9) and the pressure in the other way through one on for the air springs (6) the prescribed minimum pressure set pressure reducing valve (8) is determined. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DED50223A 1966-06-01 1966-06-01 Multi-axle suspension for commercial vehicles with a driven rear axle and at least one trailing rear axle Pending DE1297491B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DED50223A DE1297491B (en) 1966-06-01 1966-06-01 Multi-axle suspension for commercial vehicles with a driven rear axle and at least one trailing rear axle
FR108169A FR1524738A (en) 1966-06-01 1967-05-29 Additional elastic suspension for motor trucks with driven rear axle and tow axle
GB2487367A GB1122358A (en) 1966-06-01 1967-05-30 Improvements relating to rear-axle arrangements, for commercial motor vehicles, comprising driven and undriven axles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED50223A DE1297491B (en) 1966-06-01 1966-06-01 Multi-axle suspension for commercial vehicles with a driven rear axle and at least one trailing rear axle

Publications (1)

Publication Number Publication Date
DE1297491B true DE1297491B (en) 1969-06-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
DED50223A Pending DE1297491B (en) 1966-06-01 1966-06-01 Multi-axle suspension for commercial vehicles with a driven rear axle and at least one trailing rear axle

Country Status (2)

Country Link
DE (1) DE1297491B (en)
GB (1) GB1122358A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487268A1 (en) * 1980-07-26 1982-01-29 Daimler Benz Ag DEVICE FOR CONTROLLING A PNEUMATIC SUSPENSION TRAIN AXLE WITH A VERTICAL DISPLACEMENT OF A UTILITY MOTOR VEHICLE
EP0416310A1 (en) * 1989-09-07 1991-03-13 MAN Nutzfahrzeuge Aktiengesellschaft Liftable turn axle unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135254A (en) * 1983-02-17 1984-08-30 Leyland Vehicles Vehicle suspensions

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864453A (en) * 1956-06-29 1958-12-16 Gen Motors Corp Weight-shifting apparatus for tandem axle vehicles
US2934351A (en) * 1958-02-17 1960-04-26 Neway Equipment Co Load apportioning tandem suspension structure for vehicles
US3094341A (en) * 1959-08-03 1963-06-18 Magneti Marelli Spa Pneumatic suspension device
DE1157942B (en) * 1960-01-18 1963-11-21 Westinghouse Bremsen Gmbh Vehicle, in particular motor vehicle, with several axles, one of which has a mechanical suspension and an axis adjacent to it has an air suspension
FR1353979A (en) * 1962-07-16 1964-02-28 Truck Accessories Device for lifting a truck or trailer axle
US3224522A (en) * 1962-10-30 1965-12-21 Olson Trailer & Body Builders Vehicle spring and axle loading control system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864453A (en) * 1956-06-29 1958-12-16 Gen Motors Corp Weight-shifting apparatus for tandem axle vehicles
US2934351A (en) * 1958-02-17 1960-04-26 Neway Equipment Co Load apportioning tandem suspension structure for vehicles
US3094341A (en) * 1959-08-03 1963-06-18 Magneti Marelli Spa Pneumatic suspension device
DE1157942B (en) * 1960-01-18 1963-11-21 Westinghouse Bremsen Gmbh Vehicle, in particular motor vehicle, with several axles, one of which has a mechanical suspension and an axis adjacent to it has an air suspension
FR1353979A (en) * 1962-07-16 1964-02-28 Truck Accessories Device for lifting a truck or trailer axle
US3224522A (en) * 1962-10-30 1965-12-21 Olson Trailer & Body Builders Vehicle spring and axle loading control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487268A1 (en) * 1980-07-26 1982-01-29 Daimler Benz Ag DEVICE FOR CONTROLLING A PNEUMATIC SUSPENSION TRAIN AXLE WITH A VERTICAL DISPLACEMENT OF A UTILITY MOTOR VEHICLE
DE3028472A1 (en) * 1980-07-26 1982-02-18 Daimler-Benz Ag, 7000 Stuttgart CONTROL OF AN AIR SPRING, LIFTING AND LOWERING TRACK AXLE OF A COMMERCIAL VEHICLE
EP0416310A1 (en) * 1989-09-07 1991-03-13 MAN Nutzfahrzeuge Aktiengesellschaft Liftable turn axle unit

Also Published As

Publication number Publication date
GB1122358A (en) 1968-08-07

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