GB2497002A - An arrangement of a tandem axle on a frame of a utility vehicle - Google Patents
An arrangement of a tandem axle on a frame of a utility vehicle Download PDFInfo
- Publication number
- GB2497002A GB2497002A GB201222440A GB201222440A GB2497002A GB 2497002 A GB2497002 A GB 2497002A GB 201222440 A GB201222440 A GB 201222440A GB 201222440 A GB201222440 A GB 201222440A GB 2497002 A GB2497002 A GB 2497002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- operating
- axle
- text
- load distribution
- arrangement
- 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- Withdrawn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
- 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
- B60G21/06—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 fluid
- B60G21/067—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 fluid between wheels on different axles on the same side of the vehicle, i.e. the left or the right side
-
- 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
- B60G17/033—Spring characteristics, e.g. mechanical springs and mechanical adjusting means characterised by regulating means acting on more than one spring
-
- 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
- B60G5/02—Resilient suspensions for a set of tandem wheels or axles having interrelated movements mounted on a single pivoted arm, e.g. the arm being rigid
- B60G5/03—Resilient suspensions for a set of tandem wheels or axles having interrelated movements mounted on a single pivoted arm, e.g. the arm being rigid the arm itself being resilient, e.g. a leafspring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/30—Rigid axle suspensions
- B60G2200/314—Rigid axle suspensions with longitudinally arranged arms articulated on the axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/30—Rigid axle suspensions
- B60G2200/32—Rigid axle suspensions pivoted
-
- 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
- B60G2202/11—Leaf spring
- B60G2202/112—Leaf spring longitudinally arranged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/12—Mounting of springs or dampers
- B60G2204/121—Mounting of leaf springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
- B60G2204/81—Interactive suspensions; arrangement affecting more than one suspension unit front and rear unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
- B60G2204/83—Type of interconnection
- B60G2204/8304—Type of interconnection using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/02—Trucks; Load vehicles
- B60G2300/026—Heavy duty trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/02—Trucks; Load vehicles
- B60G2300/026—Heavy duty trucks
- B60G2300/0262—Multi-axle trucks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
An arrangement of a tandem axle 10 comprising a front axle 12 and a rear axle 14 on a frame 24 of a utility vehicle is provided. The axles 12, 14 of the arrangement each have at least one spring device 20, 22 supported on the frame 24. The spring devices 20, 22 are coupled with each other via a load distribution device 54. The spring devices 20, 22 are each coupled with an operating cylinder 58, 60 of the load distribution device 54. Each of the operating cylinders 58,60 has at least one operating chamber 63, 59, 70, 71, and the operating chambers 68, 69, 70, 71 are fluidically connected with each other via at least one duct element 62, 63 of the coupling device 54.
Description
I
Arrangement of a Tandem Axle on a Frame of a Utility Vehicle The invention relates to an arrangement of a tandem axle on a frame of a utility vehicle according to the preamble of patent claim 1.
Such arrangement of a tandem axle on a frame of a utility vehicle is well known from the general prior art and is shown in the form of an example in Fig. 1 Fig. 1 shows a tandem axle 13 comprising a front axle 12 and a rear axle 14, which is spaced apart from the front axle 12 backwards in the longitudinal direction of the vehicle.
The axles 12, 14 each have wheels 16, 18 as well as respective spring devices 20, 22 in the present case in the form of leaf spring devices having at least one leaf spring. In this setup the spring devices 20, 22 each are supported on a frame 24 of the utility vehicle. In Fig. 1 in this connection a longitudinal carrier 26 of the frame 24 is discernible. The frame 24 comprises a further longitudinal carrier, which is spaced apart from the longitudinal carrier 26 in the transverse direction of the vehicle, wherein the longitudinal carriers are connected with each other in the transverse direction of the vehicle. In Fig. 1 also a direction arrow 28 is discernible, by means of which the forward drive direction of the passenger vehicle is indicated.
The spring device 20 on the one side is arranged on a console 30 and via the console it is supported on the longitudinal carrier 26. On the other side the spring device 20 is arrangedon a deflection lever 32. The deflection lever 32 is held on the lonitudinal carrier 26 to pivot about a pivot axis 34 relative to the longitudinal carrier 26so that the spring device 20 via the deflection lever 32 is supported on the longitudinal carrier 26. In analogy the spring device 22 on the one side is arranged on a console 36, which is attached on the longitudinal carrier 26, so that the spring device 22 via the console 36 is * * .* supported on the longitudinal carrier 26. On the other side the spring device 22 ès **.* arranged on a deflection leQer 38.
S
The deflection lever 38 is held on the longitudinal carrier 26 to pivot about a pivot axis 40 relative to the longitudinal carrier 26. Thereby also the spring device 22 via the deflection lever 38 is supported on the longitudinal carrier 26. The deflection levers 32, 36 in this connection via the respective consoles 42, 44 are held on the longitudinal carrier 26 to pivot relatiye to same.
The deflection levers 32, 38 have respective lever areas 46, 48, 50, which in the present case extend at least essentially perpendicularly to each other and are connected with each other. Via their lever areas 50 the deflection levers 32,38 are connected by means of a coupling element in the form of a coupling bar 52, which is common to the deflection levers 32, 38. In other words, the coupling bar 52 on the one side is articulated to the deflection lever 32 and on the other side to the deflection lever 36.
The deflection lever 32, 36 and the coupling bar 52 in this setup are associated with a load distribution device that is as a whole designated as 54. As can be seen from Fig. 1, in this setup the spring devices 20, 22 are coupled with each other via the load distribution device 54. By means of the load distribution device 54 a force acting upon one of the axles 12, 14 can be distributed between both axles 12, 14 so that thereby the actually unloaded axle 12 or 14 is loaded and load is taken off the loaded axle 12 or 14. Thereby an excessive load upon one of the axles 12, 14 can be avoided. Further, this leads to a very good traction of the utility vehicle.
If for instance a load acts upon the rear axle 14 so that the rear axle 14 moves upward, the deflection lever 38 with regard to the image plane of Fig. 1 is pivoted clockwise about the pivot axis 40. This pivoting movement of the deflection lever 38 is transferred via the coupling bar 52 to the deflection lever 32 so that the deflection lever 32 is pivoted clockwise about its pivot axis 34.Thereby the axle 12 in the vertical direction of the vehicle is pressed down towards the bottom 56, whereby the axle 12 is loaded and the axle 14 unloaded. In other words the wheel 16 is pressed towards the bottom 56 via the spring device 20. The corresponding opposite occurs if the axle 12 is loaded. * S
The load distribution device 54 in this connection is configured as a mechanical load distribution device, wherein in particular the coupling bar 52 requires a rejatively large S...
construction space. The required construction space of the coupling bar 52 in this connection may be conflicting with the construction space requirements of an engine, a gear drive, as well as a steering linkage of a steering mechanism of a utility vehicle, if the coupling bar 52 is arranged in the transverse direction of the vehicle inside or outside the frame 24, Also an arrangement of the coupling bar 52 above or below the frame 24 can lead to problems with regard to construction space, as its construction space requirement then comes into conflict with a construction space requirement of a structure or a construction space requirement of the tandem axle 10.
The DE 1 256 090 Al discloses a device for connecting an adjustable, pneumatically suspended auxiliary axle for vehicles for vehicles with several suspended main axles, in which device in the duct for the pressurizing medium a control valve is included for the air spring of the auxiliary axle. The control valve independently of the distance of one of the main axles from the vehicle frame controls the filling and unloading of the air spring. In this connection it is envisaged that the main axle is mechanically suspended in a basically known way and the control valve is controllable via a mechanical rod system by the main axle. This device equally has a raised construction space requirement and complexity.
It is therefore the task of the present invention to provide an arrangement of a tandem axle on a frame of the utility vehicle of the initially named kind, in which a load distribution between the individual axles of the tandem axle is realizable in a particularly simple and construction space efficient way.
This task is solved by an arrangement with the features of patent claim I. Advantageous embodiments with expedient and non-trivial further developments of the invention are indicated in the remaining claims.
In order to create an arrangement of the kind named in the preamble of patent claim 1, in which a load distribution between the axles of the tandem axle is realizable in a particularly simple and construction space efficient way, it is envisaged according to the present invention that the spring devices each are coupled with an operating cylinder of the load distribution device having at least one operating chamber, wherein the operating chambers are fluidically connected with each other via at least one duct element of the coupling device. The load distribution between the individual axles of the tandem axle thus can also be effected by a medium that can be received in the operating chambers and the duct element, wherein the operating chambers are fluidically connected with each * other in a particularly construction space efficient way via the duct element. As a consequence of this fluidic connection the ades are coupled with each other in a construction space efficient way, wherein a load distribution between the axles is effected via the medium.
If for instance one of the axles is loaded, this load of the one axle via a corresponding operating cylinder and the medium can be transferred to the other operating cylinder and thus to the other axle, so that the other axle is loaded and load taken off the one axle.
The medium in this connection is for instance a gas and preferably a liquid, with the operating cylinder being designed to be operated by means of a liquid, i.e. as hydraulic cylinder. By means of such hydraulic cylinder also particuJarly high loads are transferred and thus distributed between the axles of the tandem axle.
By contrast to the initially described, mechanical load distribution device, now the duct element of the present pneumatic or preferably hydraulic load distribution device can be arranged in a particularly construction space efficient way. For instance, it is possible to arrange the duct element within a receptacle bounded by a longitudinal carrier of the frame. The longitudinal carrier for instance can have a C-shaped, open cross-section, in which the duct element is arranged.
Further, the operating cylinders can be designed to be particularly light in weight and particularly small with regard to their outer dimensions. The load distribution device thus has only a very small construction space so that package problems can be avoided.
Moreover, the toad distribution device has a particularly even and smooth operation.
Further advantages, features, and details of the invention may be gathered from the following description of preferred embodiments as well as by reference to the drawing.
The features and feature combinations previously named in the description as well as the *:" features and feature combinations mentioned in the following in the description of the figures and/or in the figures alone can be employed not only in the corresponding indicated combination, but also in any other combinations or taken alone, without leaving the scope of the invention.
The drawing shows in:
S
Fig. 1 a schematic lateral view of an arrangement of a tandem axle on a frame of
a utility vehicle according to the prior art;
Fig. 2 a schematic lateral view of a further embodiment of the arrangement of the tandem axle on the frame of the utility vehicle, wherein a hydraulic load distribution device having two single-acting operating cylinders is provided; and Fig. 3 a schematic lateral view of a further embodiment of the arrangement according to Fig. 2 wherein the hydraulic load distribution device comprises two double-acting operating cylinders.
In the figures same elements arid elements having same functions are equipped with same reference signs.
The arrangement of the tandem axle 10 on the frame 24 according to Fig. 2 differs from the arrangement according to Fig. 1 in that the load distribution device 54 now instead of the coupling bar 52 comprises operating cylinders 58, 60 as well as a duct element 62.
The operating cylinders 58, 60 in the present case are configured as single-acting hydraulic cylinders and each comprise a housing 64, 66, through which a respective operating chamber 68, 70 of the respective operating cylinder 58, 60 is bounded. The respective operating cylinder 58, 60 also comprises a piston 72, 74 bounding the corresponding operating chamber 68, 70, the piston 72, 74 being connected to the respective piston rod 76, 78. The respective piston 72, 74 in this setup is received within the respective housing 64, 66 to be translatorily shiftable relative to the housing 64, 66, wherein the respective piston rod 76, 78 moving along with the respective operating chamber 68, 70. * .s * * * * .
As can be seen from Fig. 2, the piston rod 76 is coupled with the deflection lever 32, whilst the piston rod 78 is coupled with the deflection lever 38. Moreover, the duct tfls..
* element 62 on the side is fluidically connected to the operating chamber 68 and on the other side is fluidically connected to the operating chamber 70 so that thereby operating * *** chambers 66, 70 are fluidically connected with each other via the duct element 62. * .
If for instance an upward acting load is applied to the wheel 16 of the axle 12, thereby a force acting at least essentially in the longitudinal direction of the vehicle and insinuated in Fig. 2 by a force arrow Fl is applied to the piston rod 76 via the spring device 20 and the corresponding deflection provided by the deflection lever 32. As a consequence of this application of force the piston 72 is shifted with regard to the image plane of Fig. 2 to the right via the piston rod 76. This leads to a reduction in volume of the operating chamber 68, as the piston 72 moves relative to the housing 64. Oue to this reduction in volume hydraulic liquid passes from the operating chamber 66 via the duct element 62 into the operating chamber 70. in other words, the hydraulic liquid due to the loading of the axle 12 by means of the piston 72 is pressed out from the operating chamber 68 into the operating chamber 70. From this results via the piston 74 a force insinuated in Fig. 2 by a force arrow F2, which acts via the piston rod 78 upon the deflection lever 38 with reference to the image plane of Fig. 2 to the left.
As a consequence of this application of force the wheel 18 of the axle 14 is pressed downwards to the bottom 56 via the spring device 22 and is thus loaded, whereby load is taken off the axle 12. Upon corresponding loading of the axle 14 the load distribution between the two axles 12, 14 is effected correspondingly vice versa.
In contrast to the load distribution device 54 according to Fig. 1 the load distribution device 54 according to Fig. 2 requires only very small construction space, as the operating cylinder 58, 60 as well as the duct element 62 can be stowed in a space-saving way in a for instance C-shaped or U-shaped open cross-section of the longitudinar carrier 26. The operating cylinders 58, 60 -depending on the deflection of the respective deflection lever 32 38 -could for instance have a total stroke ranging from between and including 80 mm up to and including 140 mm. St 0
* * Fig. 3 shows a further embodiment of the arrangement according to Fig. 2, wherein the two operating cylinders 58, 60 now are designed as double-acting hydraulic cylinders. In this connection the operating cylinder 58 comprises the operating chamber 68 and the further operating chamber 69, whilst the operating cylinder 60 comprises the operating chamber 70 and a further operating chamber 71. The operating chambers 68, 70 therein are fluidically connected with each other via the duct element 62. whilst the operating chambers 69, 71 are fluidically connected with each other via a further duct element 63 of the hydraulic load distribution device 54. The duct elements 62, 63 are for instance designed to be flexible hose pipes, in particular flexible tissue tubes, and thus in particular unlike the inherently rigid and inflexible coupling bar 52 can be arranged to meet requirements particularly well and can also be arranged in curves or bends. S. * S S * *
S
* S. 555 * S * * * . * S..
S *5** * * S... s*S * S
Claims (1)
- <claim-text>Claims 1. An arrangement of a tandem axle (10) comprising a front axle (12) and a rear axle (14) on a frame (24) of a utility vehicle, in which arrangement the axles (12, 14) each comprise at least one spring device (2D, 22), with the spring devices (20, 22) being coupled with each other via a load distribution device (54), characterized in that the spring devices (20, 22) each are coupled wfth an operating cylinder (58, 60) of the load distribution device (54) comprising at least one operating chamber (68, 69, 70, 71), wherein the operating chambers (68, 69, 70, 71) are fluidically coupled with each other via a duct element (62, 63) of the load distribution device (54).</claim-text> <claim-text>2. The arrangement according to claim 1, characterized in that the spring devices (20, 22) are designed as leaf spring devices (20, 22).</claim-text> <claim-text>3. The arrangement according to any one of claims 1 or 2, characterized in that the spring devices (20, 22) are supported via a respective deflection lever (32, 35) of the load distribution device (54) held pivotably about a pivot axis (34, 40) relative to the frame (24), wherein the deflection levers (32, 38) are coupled with the respective operating cylinder (58. 60) of the corresponding axle (12, 14).</claim-text> <claim-text>4. The arrangement according to any one of the preceding claims, characterized in that the operating cylinders (58, 60) are configured as operating cylinders (58, 60) operated by means of a liquidS</claim-text> <claim-text>5. The arrangement according to any one of the preceding claims, characterized in thatSS..... S *the operating cylinders (58, 60) are designed as double-acting operating cylinders (58, 60) and each have two operating chambers (68, 69, 70, 71), wherein a first one of the operating chambers (68, 69) of a first one of the operating cylinders (58, 60) is fluidically connected with a first operating chamber (70, 71) of the second operating cylinder (60) and the second operating chamber (69) of the first cylinder (58) is fluidically connected with the second operating chamber (71) of the second operating cylinder (60). * * ** fl*.* * * * * ** * * S.. * S *555*...** * .</claim-text>
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201222440A GB2497002A (en) | 2012-12-12 | 2012-12-12 | An arrangement of a tandem axle on a frame of a utility vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201222440A GB2497002A (en) | 2012-12-12 | 2012-12-12 | An arrangement of a tandem axle on a frame of a utility vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201222440D0 GB201222440D0 (en) | 2013-01-23 |
| GB2497002A true GB2497002A (en) | 2013-05-29 |
Family
ID=47602525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201222440A Withdrawn GB2497002A (en) | 2012-12-12 | 2012-12-12 | An arrangement of a tandem axle on a frame of a utility vehicle |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2497002A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1069789A (en) * | 1961-05-11 | 1967-05-24 | Neway Equipment Co | Improvements in or relating to suspension structures for vehicles |
| GB1170613A (en) * | 1965-11-19 | 1969-11-12 | Maschf Augsburg Nuernberg Ag | Improvements in or relating to Axle Suspensions of Motor Vehicles |
| GB1467443A (en) * | 1974-05-14 | 1977-03-16 | Watson N | Suspension bogies for road vehicles |
| FR2590525A1 (en) * | 1985-11-22 | 1987-05-29 | Renault Vehicules Ind | Device for improving the power-transmitting adhesion of a tandem axle to a single drive bogie |
| EP2390121A1 (en) * | 2010-05-31 | 2011-11-30 | Schmitz Gotha Fahrzeugwerke GmbH | Commercial vehicle trailer and control device for pneumatic spring assembly |
-
2012
- 2012-12-12 GB GB201222440A patent/GB2497002A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1069789A (en) * | 1961-05-11 | 1967-05-24 | Neway Equipment Co | Improvements in or relating to suspension structures for vehicles |
| GB1170613A (en) * | 1965-11-19 | 1969-11-12 | Maschf Augsburg Nuernberg Ag | Improvements in or relating to Axle Suspensions of Motor Vehicles |
| GB1467443A (en) * | 1974-05-14 | 1977-03-16 | Watson N | Suspension bogies for road vehicles |
| FR2590525A1 (en) * | 1985-11-22 | 1987-05-29 | Renault Vehicules Ind | Device for improving the power-transmitting adhesion of a tandem axle to a single drive bogie |
| EP2390121A1 (en) * | 2010-05-31 | 2011-11-30 | Schmitz Gotha Fahrzeugwerke GmbH | Commercial vehicle trailer and control device for pneumatic spring assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201222440D0 (en) | 2013-01-23 |
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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) |