GB2297732A - Vehicle suspension - Google Patents
Vehicle suspension Download PDFInfo
- Publication number
- GB2297732A GB2297732A GB9502667A GB9502667A GB2297732A GB 2297732 A GB2297732 A GB 2297732A GB 9502667 A GB9502667 A GB 9502667A GB 9502667 A GB9502667 A GB 9502667A GB 2297732 A GB2297732 A GB 2297732A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chassis
- axle
- trailing arm
- vehicle
- suspension
- 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- Withdrawn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
- B60G3/00—Resilient suspensions for a single wheel
- B60G3/02—Resilient suspensions for a single wheel with a single pivoted arm
- B60G3/12—Resilient suspensions for a single wheel with a single pivoted arm the arm being essentially parallel to the longitudinal axis of the vehicle
-
- 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
- B60G9/00—Resilient suspensions of a rigid axle or axle housing for two or more wheels
- B60G9/003—Resilient suspensions of a rigid axle or axle housing for two or more wheels the axle being rigidly connected to a trailing guiding device
Abstract
A trailing arm suspension arrangement is characterised by a link 47 which has one end pivotally connected to a trailing arm 43 at a point in front of the axle 45, and the other end pivotally connected to a swinging shackle 46. A pressure operable fluid spring 50 is located between the link 47 and the vehicle chassis 41. The trailing arm 43 may be a leaf spring or a rigid connection. The suspension is arranged to spread loads along the chassis and to facilitate satisfactory ride comfort in conditions of increased axle travel.
Description
2297732 1 VEHICLE SUSPENSION The present invention relates to a vehicle
suspension.
Even on reasonably good roads the body of a vehicle is subjected to three different types of motion, i.e. bounce, roll and pitch. The function of a vehicle suspension system is to counteract the effects of this motion so as to provide a safe and comfortable ride.
one known vehicle suspension unit, as illustrated in Fig.1, comprises a mechanical arrangement 10 in which semielliptical spring leaves 11 are provided at each end of the vehicle axle 12 for attaching the axle 12 to the vehicle chassis 13. The ends of the semi-elliptical spring leaves 11 are fixed to the chassis 13 by a pivotal connection 14 at one end and by a second pivot 15 to a swinging shackle 18 at the other end.
An alternative form of suspension unit is a pneumatic suspension. A pneumatic suspension 20 is shown in Fig.2. Here the suspension unit comprises a trailing arm which extends rearwardly from a pivotal connection 22 with the chassis and extends either above or below the axle 24 to provide a platform for a pneumatic air spring 25. The pneumatic spring 25 is located between the non-fixed end of the trailing arm 21 and the vehicle chassis 23. Thus the only restricted fixture is at the pivotal connection. One such suspension arrangement is provided at each side of the vehicle 2 chassis, each providing a rigid connection 26 between the trailing arm 21 and the vehicle axle some distance from the pivotal connection.
The trailing arms 21 may comprise a spring leaf or a fabricated metal structure.
Side location for the axle is provided by the rigid clamping of the trailing arms to the axle maintaining a 900 angle between them. A panhard rod may alternatively be used.
For any upwards or downwards travel of the axle 24 shown in Fig.2 to take place a greater movement of the air spring 25 is required. For normal axle travel this is accommodated by commercially available air springs. However, recent market conditions have demanded much greater axle travel than was previously thought acceptable. This greater axle travel cannot be achieved with an acceptable ride by the suspension illustrated in Fig. 2.
A further known suspension 30 is illustrated in Fig.3. Here an air spring 31 is located in front of the axle 32; that is closer to the pivotal connection 33. However, because of the proximity of the load carrying points 31,33 this suspension provides poor ride comfort and additional stresses are transmitted to the chassis.
The present invention seeks to provide a suspension that 3 facilitates satisfactory ride comfort in conditions of increased axle travel.
According to the present invention there is provided a vehicle suspension apparatus for connecting a wheel to a vehicle chassis, said suspension apparatus having at least two mechanical connections with the vehicle chassis and further comprising a pressure fluid operable spring.
The suspension apparatus described above is conventionally located on one side of a vehicle chassis, a similar apparatus being provided on the other side of the vehicle chassis. The suspension of the apparatus provides a sufficient number of attachment points with the chassis to spread the load along the chassis.
The pressure fluid operable spring may be hydraulic, but is ideally pneumatic.
The vehicle suspension apparatus ideally comprises a trailing arm that is pivotally connected to the chassis and extends rearwardly to the axle. A rigid connection is ideally provided between the trailing arm and the axle.
A second link is preferably provided between the trailing arm and a pivotal connection with the chassis. A pivotal connection is preferably provided between the trailing arm and the second link. The pivotal connection with the trailing arm 4 is ideally in front of the axle. The pivotal connection with the chassis preferably involves a swinging shackle.
The pressure fluid operable spring is ideally located on the second link at a position above the lowermost position of the second link. The positioning of the pressure fluid operable spring is such that the spring is subjected to less extension during axle travel than would be required for conventional systems.
The invention will now be described further, by way of example, with reference to the accompanying diagrammatic drawings, wherein:
Fig.1 is a side elevation showing a first prior art suspension system;
Fig.2 is a side elevation of a second prior art suspension system;
Fig.3 is a side elevation of a third prior art suspension system; and
Fig.4 is a side elevation of a suspension in accordance with the present invention.
The prior art of Figs. 1 to 3 have been discussed in detail in the introductory paragraphs hereof and will not be discussed further here.
Referring to Fig. 4 a suspension 40 in accordance with the present invention is located below a vehicle chassis 41. A flange 42 depends from the chassis 41. One end of a trailing arm 43 is connected to the f lange 42 by a pivot 44. The trailing arm 43 extends rearwardly from the pivot 44 to the vehicle axle 45 which is rigidly connected to the end of the trailing arm 43 which is remote from the pivotal connection 44. The trailing arm 43 may comprise a spring leaf or a fabrication. The trailing arm 43 is conventionally made from metal, such as steel.
A swinging shackle 46 depends from the chassis 41 from a position located rearwardly of the vehicle axle 45. One end of a second link 47 is pivotally connected to the base of the trailing arm 43 or a flange depending therefrom at a position forward of the axle 45. The second link 47 extends below the axle 45 and extends to the free end of the swinging shackle 46. A pivotal connection 48 is provided between the second link 47 and the free end of the swinging shackle 46. It is noted that the swinging shackle 46 is connected to the chassis by a pivot 49. An air spring 50 is located on top of the second link 47 between the axle 45 and the swinging shackle 46. The air spring 46 supports the chassis 41.
It is noted that one suspension unit as described above is provided at each side of the vehicle chassis.
6 In this suspension arrangement the stroke of the air spring 50 is less than the movement of the axle 45, thus facilitating greater ride comfort at extreme axle travel conditions. In addition the axle 45 is attached to the chassis at four points (2 points per suspension unit) as with a mechanical suspension. The air spring 50 is located to the rear of the axle 45 away from the pivotal connection 42 with the chassis thus maintaining load spread along the chassis.
It is to be understood that the above described embodiment is by way of illustration only. Many modifications and variations are possible.
7
Claims (9)
1 - A vehicle suspension apparatus for connecting a wheel to a vehicle chassis, said suspension apparatus having at least two mechanical connections with the vehicle chassis and further comprising a pressure fluid operable spring.
2. A vehicle suspension apparatus as claimed in claim 1, wherein the trailing arm is pivotally connected to the chassis and extends rearwardly to an axle for the wheel.
3. A vehicle suspension apparatus as claimed in claim 2, wherein a rigid connection is provided between the trailing arm and the axle.
4. A vehicle suspension apparatus as claimed in any preceding claim, wherein a second link is provided between the trailing arm and a pivotal connection with the chassis.
5. A vehicle suspension apparatus as claimed in any preceding claim, wherein a pivotal connection is provided between the trailing arm and the second link.
6. A vehicle suspension apparatus as claimed in claim 5, wherein the said pivotal connection between the trailing arm and second link is located in front of an axle for the wheel.
A vehicle suspension apparatus as claimed in claim 4, 8 wherein the pivotal connection with the chassis involves a swinging shackle.
8. A vehicle suspension apparatus as claimed in claim 4, wherein the further pressure fluid operable spring is located on the second link.
9. A vehicle suspension substantially as described herein with reference to Fig.4.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9502667A GB2297732A (en) | 1995-02-11 | 1995-02-11 | Vehicle suspension |
IES960113 IES960113A2 (en) | 1995-02-11 | 1996-02-09 | Vehicle suspension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9502667A GB2297732A (en) | 1995-02-11 | 1995-02-11 | Vehicle suspension |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9502667D0 GB9502667D0 (en) | 1995-03-29 |
GB2297732A true GB2297732A (en) | 1996-08-14 |
GB2297732A8 GB2297732A8 (en) | 1997-02-17 |
Family
ID=10769429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9502667A Withdrawn GB2297732A (en) | 1995-02-11 | 1995-02-11 | Vehicle suspension |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2297732A (en) |
IE (1) | IES960113A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0879153A1 (en) | 1996-02-15 | 1998-11-25 | AMK Automotive Limited | Improvements in vehicle suspensions |
EP1911613A1 (en) * | 2006-10-13 | 2008-04-16 | Goldschmitt techmobil AG | Axle suspension with two wheel guiding springs |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4518171A (en) * | 1983-10-14 | 1985-05-21 | Hedenberg William E | Air suspension system |
US4541653A (en) * | 1982-09-30 | 1985-09-17 | Raidel John E | Air spring suspension with angular torque beam, U-joint mount therefor, and lateral guides |
US4619467A (en) * | 1984-04-16 | 1986-10-28 | Lafferty James W | Variable rate air spring apparatus for vehicle suspension |
GB2218949A (en) * | 1988-03-31 | 1989-11-29 | Paccar Inc | Air bag axle suspension system |
US4934733A (en) * | 1989-02-22 | 1990-06-19 | Dbx Corporation | Trailer suspension apparatus |
US5351986A (en) * | 1993-04-14 | 1994-10-04 | Hedenberg William E | Vehicle air suspension system |
-
1995
- 1995-02-11 GB GB9502667A patent/GB2297732A/en not_active Withdrawn
-
1996
- 1996-02-09 IE IES960113 patent/IES960113A2/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4541653A (en) * | 1982-09-30 | 1985-09-17 | Raidel John E | Air spring suspension with angular torque beam, U-joint mount therefor, and lateral guides |
US4518171A (en) * | 1983-10-14 | 1985-05-21 | Hedenberg William E | Air suspension system |
US4619467A (en) * | 1984-04-16 | 1986-10-28 | Lafferty James W | Variable rate air spring apparatus for vehicle suspension |
GB2218949A (en) * | 1988-03-31 | 1989-11-29 | Paccar Inc | Air bag axle suspension system |
US4934733A (en) * | 1989-02-22 | 1990-06-19 | Dbx Corporation | Trailer suspension apparatus |
US5351986A (en) * | 1993-04-14 | 1994-10-04 | Hedenberg William E | Vehicle air suspension system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0879153A1 (en) | 1996-02-15 | 1998-11-25 | AMK Automotive Limited | Improvements in vehicle suspensions |
EP1911613A1 (en) * | 2006-10-13 | 2008-04-16 | Goldschmitt techmobil AG | Axle suspension with two wheel guiding springs |
Also Published As
Publication number | Publication date |
---|---|
IES69273B2 (en) | 1996-08-21 |
IES960113A2 (en) | 1996-08-21 |
GB2297732A8 (en) | 1997-02-17 |
GB9502667D0 (en) | 1995-03-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |