ITTO960886A1 - PNEUMATIC SUSPENSION FOR A VEHICLE AXLE. - Google Patents
PNEUMATIC SUSPENSION FOR A VEHICLE AXLE. Download PDFInfo
- Publication number
- ITTO960886A1 ITTO960886A1 IT96TO000886A ITTO960886A ITTO960886A1 IT TO960886 A1 ITTO960886 A1 IT TO960886A1 IT 96TO000886 A IT96TO000886 A IT 96TO000886A IT TO960886 A ITTO960886 A IT TO960886A IT TO960886 A1 ITTO960886 A1 IT TO960886A1
- Authority
- IT
- Italy
- Prior art keywords
- suspension
- suspension according
- axle
- air spring
- arm
- Prior art date
Links
- 239000000725 suspension Substances 0.000 title claims description 29
- 238000005266 casting Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 210000004072 lung Anatomy 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/004—Mounting arrangements for axles
- B60B35/006—Mounting arrangements for axles with mounting plates or consoles fitted to axles
- B60B35/008—Mounting arrangements for axles with mounting plates or consoles fitted to axles for mounting air suspension elements to axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/16—Axle housings
-
- 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
- B60G11/28—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs characterised by means specially adapted for attaching the spring to axle or sprung part 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
- B60G11/26—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
- B60G17/052—Pneumatic spring characteristics
-
- 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
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/152—Pneumatic spring
-
- 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
- B60G2202/152—Pneumatic spring
- B60G2202/1524—Pneumatic spring with two air springs per wheel, arranged before and after the wheel axis
-
- 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
- B60G2204/128—Damper mount on vehicle body or chassis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/30—Constructional features of rigid axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/81—Shaping
- B60G2206/8101—Shaping by casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/14—Trucks; Load vehicles, Busses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Description
D E S C R I Z IO N E DESCRIPTION
del brevetto per invenzione industriale of the patent for industrial invention
La presente invenzione è relativa ad una sospensione pneumatica per un assale di autoveicolo, particolarmente per un veicolo industriale quale un autobus o un autocarro. The present invention relates to a pneumatic suspension for a motor vehicle axle, particularly for an industrial vehicle such as a bus or a truck.
Sono note sospensioni pneumatiche comprendenti, per ciascun lato del veicolo, almeno un braccio di sospensione vincolato ad una porzione di estremità dell'assale ed almeno una molla ad aria interposta tra il braccio ed il telaio del veicolo. Pneumatic suspensions are known comprising, for each side of the vehicle, at least one suspension arm constrained to an end portion of the axle and at least one air spring interposed between the arm and the vehicle frame.
Allo scopo di diminuire la rigidezza della sospensione, è noto utilizzare capacità ausiliarie o polmoni collegate in serie alle molle. Tali polmoni creano però degli ingombri aggiuntivi, con gli evidenti inconvenienti che ne conseguono. In particolare, possono sorgere difficoltà di dimensionamento ed alloggiamento degli organi adiacenti; inoltre, nel caso degli autobus, ingombri aggiuntivi possono impedire di ribassare localmente il piano pavimento e quindi limitare l'ampiezza delle aree -disponibili per i passeggeri all'interno dell'abitacolo. In order to decrease the stiffness of the suspension, it is known to use auxiliary capacities or lungs connected in series with the springs. However, these lungs create additional bulk, with the obvious drawbacks that follow. In particular, difficulties may arise in sizing and housing the adjacent members; moreover, in the case of buses, additional dimensions can prevent the floor level from being lowered locally and therefore limit the width of the areas available for passengers inside the passenger compartment.
Scopo della presente invenzione è la realizzazione di una sospensione pneumatica per un assale di un autoveicolo del tipo brevemente -descritto, la quale sia priva degli inconvenienti connessi con le sospensioni note e sopra specificati. The object of the present invention is to provide a pneumatic suspension for an axle of a motor vehicle of the type described briefly, which is free from the drawbacks connected with the known and above specified suspensions.
Il suddetto scopo è raggiunto dalla presente invenzióne, in quanto essa è relativa ad una sospensione pneumatica per un assale di un autoveicolo, del tipo comprendente almeno un organo di supporto vincolato al detto assale, almeno una molla ad aria interposta tra il detto organo di supporto .ed un telaio del detto autoveicolo, ed una capacità ausiliaria collegata pneumaticamente alla detta molla ad aria, caratterizzata dal fatto che il detto organo di supporto presenta almeno una cavità interna comunicante con la detta molla ad aria ' e definente la detta capacità ausiliaria. The aforesaid object is achieved by the present invention, since it relates to a pneumatic suspension for an axle of a motor vehicle, of the type comprising at least one support member attached to said axle, at least one air spring interposed between said support member and a frame of the said motor vehicle, and an auxiliary capacity connected pneumatically to the said air spring, characterized in that the said support member has at least one internal cavity communicating with the said air spring and defining the said auxiliary capacity.
Per una migliore comprensione della presente invenzione, viene descritta nel seguito una forma preferita di attuazione, a titolo di esempio non limitativo e con riferimento ai disegni allegati, nei quali: For a better understanding of the present invention, a preferred embodiment is described below, by way of non-limiting example and with reference to the attached drawings, in which:
la figura 1 è una vista laterale schematica di una sospensione di un assale di un autoveicolo realizzata secondo i dettami della presente invenzione;' Figure 1 is a schematic side view of a suspension of an axle of a motor vehicle made according to the dictates of the present invention;
la figura 2 è una vista schematica in pianta della sospensione di figura 1; Figure 2 is a schematic plan view of the suspension of Figure 1;
la figura 3 è una vista in pianta, in scala ingrandita ed in parziale sezione di un particolare della sospensione di figura 1; e Figure 3 is a plan view, on an enlarged scale and in partial section, of a detail of the suspension of Figure 1; And
la figura 4 è una vistaL laterale parziale, in scala ingrandita ed in parziale sezione, del particolare di figura 3. -Con riferimento alle figure 1 e 2, è indicata nel suo complesso con 1 una sospensione pneumatica per un assale 2 posteriore di un autoveicolo 3 (parzialmente illustrato), in particolare un-'autobus. Figure 4 is a partial side view, on an enlarged scale and in partial section, of the detail of Figure 3. -With reference to Figures 1 and 2, 1 indicates as a whole a pneumatic suspension for a rear axle 2 of a motor vehicle 3 (partially illustrated), in particular a bus.
Il veicolo 3 presenta un telaio 4 (parzialmente illustrato) comprendente una coppia di longheroni 5. The vehicle 3 has a frame 4 (partially illustrated) comprising a pair of side members 5.
La :sospensione 1 comprende essenzialmente una pluralità di elementi di ,'col-legamento articolato dell’assale 2 al telaio 4; tali elementi, di tipo noto e pertanto non descritti in dettaglio nel seguito, sono indicati nel loro complesso con il numero 6. The: suspension 1 essentially comprises a plurality of elements for the articulated connection of the axle 2 to the frame 4; these elements, of a known type and therefore not described in detail below, are indicated as a whole with the number 6.
La sospensione 1 comprende inoltre, per ciascun lato del veicolo, una coppia di bracci 7, 8, rispettivamente anteriore e posteriore, rigidamente vincolati all’assale 2 ed estendentisi da questo in direzione sostanzialmente longitudinale. The suspension 1 also comprises, for each side of the vehicle, a pair of arms 7, 8, respectively front and rear, rigidly constrained to the axle 2 and extending from this in a substantially longitudinal direction.
I bracci 7, 8 sono sagomati in modo da incurvarsi verso l'esterno del veicolo verso le proprie estremità libere 9. The arms 7, 8 are shaped so as to bend towards the outside of the vehicle towards their free ends 9.
La sospensione 1 comprende infine quattro molle ad aria 10 interposte tra le rispettive estremità libere 9 dei bracci 7, 8 ed il telaio 4. Più precisamente, le molle 10 appoggiano superiormente contro rispettive mensole 14, facenti parte del telaio 4, rigidamente collegate ai longheroni 5 ed estendentisi a sbalzo da questi verso l'esterno del veicolo 3. The suspension 1 finally comprises four air springs 10 interposed between the respective free ends 9 of the arms 7, 8 and the frame 4. More precisely, the springs 10 rest at the top against respective brackets 14, forming part of the frame 4, rigidly connected to the side members 5 and projecting from these towards the outside of the vehicle 3.
Secondo la presente invenzione, i bracci 7, 8 sono cavi e definiscono al proprio interno, ciascuno, una capacità ausiliar-ia collegata pneumaticamente con la rispettiva molla 10. According to the present invention, the arms 7, 8 are hollow and each define internally an auxiliary capacity connected pneumatically with the respective spring 10.
Nelle figure 3 e 4 è illustrato in dettaglio un braccio 7; la descrizione che segue è limitata a tale braccio per comodità di riferimento, essendo evidente che l'altro braccio 7 è simmetrico a quello descritto rispetto al piano mediano del veicolo, e che i bracci 8 presentano analoghe caratteristiche. Figures 3 and 4 show an arm 7 in detail; the following description is limited to this arm for ease of reference, it being clear that the other arm 7 is symmetrical to the one described with respect to the median plane of the vehicle, and that the arms 8 have similar characteristics.
Con riferimento alle figure 3 e 4, il braccio 7 è realizzato per fusione in ghisa, convenientemente mediante un processo di colata con anima a perdere, e presenta una cavità interna 15 che definisce la suddetta capacità ausiliaria. With reference to Figures 3 and 4, the arm 7 is made by casting in cast iron, conveniently by means of a casting process with a disposable core, and has an internal cavity 15 which defines the aforementioned auxiliary capacity.
Il braccio 7 presenta, sulla propria estremità libera 9, una flangia 16 allungata di appoggio e fissaggio per la relativa molla 10. La flangia 16 è provvista di una coppia di fori 18 periferici per rispettive viti 20 di fissaggio estendentisi verso il basso da una parete 21 inferiore della molla 10. The arm 7 has, on its free end 9, an elongated flange 16 for supporting and fixing the relative spring 10. The flange 16 is provided with a pair of peripheral holes 18 for respective fixing screws 20 extending downwards from a wall 21 lower spring 10.
L’estremità 9 presenta inoltre un'apertura 22 superiore circolare, comunicante con. la cavità 15 e realizzata in corrispondenza di una zona centrale della flangia 16. The end 9 also has a circular upper opening 22, communicating with. the cavity 15 is made in correspondence with a central area of the flange 16.
Il braccio 7 presenta infine una coppia di ulteriori aperture 24, 25 di lavorazione ricavate rispettivamente su una parete -26 -di estremità opposta all’estremità 9 ed in una· parete 27 inferiore dell'estremità 9 stessa. Le aperture '24, 25 sono necessarie per motivi tecnologici legati al processo di colata del braccio e non hanno alcuno scopo funzionale. Pertanto, poiché la cavità 15 deve essere a tenuta di fluido, tali aperture sono chiuse da rispettivi coperchi 28, 29 fissati alle rispettive pareti 26, 27. I coperchi 28, 29 sono provvisti di rispettive guarnizioni 30 di tenuta anulari (OR) cooperanti con le rispettive pareti 26, 27 intorno alle relative aperture 24, 25. The arm 7 finally has a pair of further openings 24, 25 for processing obtained respectively on a wall -26 - of the opposite end to the end 9 and in a lower wall 27 of the end 9 itself. The openings '24, 25 are necessary for technological reasons related to the casting process of the arm and have no functional purpose. Therefore, since the cavity 15 must be fluid-tight, these openings are closed by respective lids 28, 29 fixed to the respective walls 26, 27. The lids 28, 29 are provided with respective annular (OR) sealing gaskets 30 cooperating with the respective walls 26, 27 around the relative openings 24, 25.
La parete inferiore 21 del-la molla presenta un foro 34 centrale, nel quale è fissata una boccola 35 ad asse verticale. La boccola 35 è provvista di una guarnizione 36 anulare periferica, ed impegna a tenuta l'apertura superiore 22 dell'estremità 9, in modo tale da collegare pneumaticamente la molla 10 con la capacità ausiliaria definita dalla cavità 15. The lower wall 21 of the spring has a central hole 34 in which a bush 35 with a vertical axis is fixed. The bush 35 is provided with a peripheral annular gasket 36, and hermetically engages the upper opening 22 of the end 9, so as to pneumatically connect the spring 10 with the auxiliary capacity defined by the cavity 15.
Il funzionamento della sospensione 1 è in sé noto. La sospensione- presenta una, cedevolezza maggiore rispetto -ad una sospensione convenzionale impiegante molle identiche, grazie alle capacità ausiliarie collegate alle molle 10 stesse e ricavate all'interno dei bracci 7, 8. The operation of the suspension 1 is per se known. The suspension has greater compliance than a conventional suspension using identical springs, thanks to the auxiliary capacities connected to the springs 10 themselves and obtained inside the arms 7, 8.
Tale maggiore cedevolezza, che si traduce in maggiore comfort per i passeggeri del veicolo, è ottenuta senza ingombri aggiuntivi. This greater compliance, which translates into greater comfort for the passengers of the vehicle, is obtained without additional bulk.
Risulta infine chiaro che alla sospensione 1 possono -essere apportate modifiche e varianti che non escono dall'ambito di tutela delle rivendicazioni; Finally, it is clear that modifications and variations may be made to the suspension 1 which do not depart from the scope of protection of the claims;
In particolare, la sospensione potrebbe essere realizzata con organi di supporto delle molle di forma diversa rispetto ai bracci 7,8. In particular, the suspension could be made with support members of the springs having a different shape with respect to the arms 7,8.
Claims (1)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT96TO000886 IT1288797B1 (en) | 1996-10-31 | 1996-10-31 | PNEUMATIC SUSPENSION FOR A VEHICLE AXLE. |
| FR9713578A FR2755065B3 (en) | 1996-10-31 | 1997-10-29 | PNEUMATIC SUSPENSION FOR A MOTOR VEHICLE AXLE |
| DE29719235U DE29719235U1 (en) | 1996-10-31 | 1997-10-29 | Pneumatic suspension for a motor vehicle axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT96TO000886 IT1288797B1 (en) | 1996-10-31 | 1996-10-31 | PNEUMATIC SUSPENSION FOR A VEHICLE AXLE. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ITTO960886A1 true ITTO960886A1 (en) | 1998-05-01 |
| IT1288797B1 IT1288797B1 (en) | 1998-09-24 |
Family
ID=11414997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT96TO000886 IT1288797B1 (en) | 1996-10-31 | 1996-10-31 | PNEUMATIC SUSPENSION FOR A VEHICLE AXLE. |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE29719235U1 (en) |
| FR (1) | FR2755065B3 (en) |
| IT (1) | IT1288797B1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19809281A1 (en) * | 1998-03-04 | 1999-09-09 | Man Nutzfahrzeuge Ag | Chassis of a heavy commercial vehicle |
| DE10028278B4 (en) * | 2000-06-07 | 2008-11-13 | Zf Friedrichshafen Ag | portal axis |
| US6746031B2 (en) * | 2001-10-15 | 2004-06-08 | Meritor Light Vehicle Technology, Llc | Suspension structure as accumulator for vehicle air systems |
| GB2396140C (en) * | 2002-12-13 | 2011-06-23 | Meritor Heavy Vehicle Sys Ltd | A suspension trailing arm and method of making a suspension trailing arm |
| US7338550B2 (en) | 2005-08-02 | 2008-03-04 | Arvinmeritor Technology, Llc | Axle assembly with purge reservoir for air dryer |
| NL2000753C2 (en) * | 2007-07-16 | 2009-01-19 | Terberg Specials B V | Rear wheel suspension for a vehicle and vehicle equipped with it. |
| DE102011005311A1 (en) * | 2011-03-09 | 2012-09-13 | Zf Friedrichshafen Ag | Spring carrier arm of a spring carrier of a motor vehicle axle |
| WO2013095207A1 (en) * | 2011-12-22 | 2013-06-27 | Volvo Lastavagnar Ab | Vehicle axle housing and a vehicle comprising such an axle housing |
| DE102014011803A1 (en) * | 2014-08-09 | 2016-02-11 | Man Truck & Bus Ag | Air spring carrier for an air-suspended axle of a commercial vehicle |
| US11220149B2 (en) * | 2019-03-13 | 2022-01-11 | Zf Friedrichshafen Ag | Rear axle assembly designed to fit within rear axle envelope |
| CN111660724A (en) * | 2020-06-10 | 2020-09-15 | 安徽爱瑞特新能源专用汽车股份有限公司 | Front axle damping device for unmanned sweeping vehicle |
-
1996
- 1996-10-31 IT IT96TO000886 patent/IT1288797B1/en active IP Right Grant
-
1997
- 1997-10-29 FR FR9713578A patent/FR2755065B3/en not_active Expired - Lifetime
- 1997-10-29 DE DE29719235U patent/DE29719235U1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE29719235U1 (en) | 1997-12-11 |
| FR2755065B3 (en) | 1998-10-02 |
| FR2755065A3 (en) | 1998-04-30 |
| IT1288797B1 (en) | 1998-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted |