WO2022084937A1 - Improved cross-member for a heavy vehicle suspension system - Google Patents
Improved cross-member for a heavy vehicle suspension system Download PDFInfo
- Publication number
- WO2022084937A1 WO2022084937A1 PCT/IB2021/059761 IB2021059761W WO2022084937A1 WO 2022084937 A1 WO2022084937 A1 WO 2022084937A1 IB 2021059761 W IB2021059761 W IB 2021059761W WO 2022084937 A1 WO2022084937 A1 WO 2022084937A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cross
- fixation
- chassis
- member according
- suspension system
- Prior art date
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- 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
-
- 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
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/43—Fittings, brackets or knuckles
- B60G2204/4302—Fittings, brackets or knuckles for fixing suspension arm on the vehicle body or chassis
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/50—Electric vehicles; Hybrid vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
- B60K2001/0438—Arrangement under the floor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
Definitions
- the present invention concerns a cross-member for a suspension system, in particular a cross-member for a heavy vehicle suspension system provided with an electronic traction.
- a cross-member for a heavy vehicle suspension system provided with an electronic traction.
- Heavy vehicles such road transport vehicles, e.g. trucks, are more and more electrified for reducing their polluting emissions. In particular, such vehicles may be hybrid vehicles or purely electric vehicles.
- the electrified vehicles comprises at least an electric axle, i.e. an axle provided with electric machines such as motors/generators configured to impart a torque on the axle to allow its motion or to recharge battery modules of the vehicle when this latter is braking.
- electric machines such as motors/generators configured to impart a torque on the axle to allow its motion or to recharge battery modules of the vehicle when this latter is braking.
- battery modules are usually placed in the proximity of the electric machines of the electric axle in order to provide energy exchange with electric machines in an efficient way.
- an axle of a vehicle is connected to the chassis of this latter via a suspension system configured to dampen the forces acting between the road and the chassis. If a vehicle is provided with an electric axle as described above, the presence of the electric batteries increases the encumbrance around the chassis.
- ⁇ Figure 1 is a perspective view showing a portion of a suspension system for an electric axle of a heavy vehicle comprising a cross-member according to the invention
- ⁇ Figure 2 is a perspective enlarged view of a portion of the suspension system of figure 1
- ⁇ Figure 3 is perspective enlarged view of a cross-member according to the invention
- ⁇ Figures 4 and 5 are respectively a bottom and top view of the portion of suspension system of figure 2.
- FIG. 1 shows a portion of a chassis 1 of a heavy vehicle such as truck, comprising as known a pair of side members 2, 3 extending longitudinal along a longitudinal axis A of the vehicle.
- the chassis 1 is connected via a suspension system 4, partially shown, to an electric axle 5.
- the suspension system 4 dampens the relative movements between the chassis 1 and the electric axle 5 that is configured to provide torque to wheels, not shown, carried by the electric axle 5 itself.
- the chassis 1 is furthermore configured to carry at least one battery module 6 configured to be electrically connected to the electric axle 5 to exchange electric energy.
- the electric axle 5 is provided with electric machines that are fed by the at least one battery module 6 to provide torque to the wheels carried by the axle 5 or to receive electric energy generated by the electric machines when the vehicle is braking.
- the chassis 1 carries a single battery modules 6 housed between the side members 2, 3 and in a rear position with respect to electric axle 5.
- the suspension system 4 comprises, as known, a plurality of elements 7, 8 configured to connect the electric axle 5 to respective side members 2, 3 in order to dampen/limit a relative movement along a direction along axis A or a different axis.
- the proposed suspension system 4 comprises longitudinal right and left rods 7 configured to longitudinally limit, i.e.
- a movement of electric axle 5 and a V-rod 8 provided with two inclined arms 8', 8'' with respect to axis A and configured to limit a movement on a transversal axis perpendicular to axis A.
- the longitudinal right and left rods 7 are connected to the respective side member 2, 3 via a respective front hanger 9 further not described in detail for sake of brevity.
- the suspension system comprises other elements such as air bellow or dampers (not shown) to limit a vertical motion of the electric axle 5 and here not shown and described for simplicity.
- the V-rod 8 is connected to side members via a cross- member 10 as shown in detail in figures 2 and 3.
- the cross-member 10 comprises a pair of lateral elements 11 configured to allow the connection of the side members 2, 3 of chassis 1 and to allow the connection of the at least one battery module 6.
- the lateral elements 11 are advantageously equal, i.e. they have a shape symmetrical with respect to longitudinal axis A.
- it comprises a fixation portion 11' configured to allow the fixation of the lateral element 11 to the respective side member 2, 3.
- the fixation portion 11' is a plate-like element and defines a plurality of holes 12 configured to allow the insertion of a fixation element, not shown, such as a threaded element or a dowel to fix the fixation portion 11 to the side member 2, 3.
- a fixation element not shown, such as a threaded element or a dowel
- such plurality of holes 12 is defined by a first plurality of holes 12 grouped in a rear portion of the fixation portion 11' and a second plurality of holes 12 grouped in a front portion of the fixation portion 11'.
- the lateral element 11 further comprises a bracket 13 extending in a cantilevered way substantially perpendicular along a traversal axis B that is preferably perpendicular to longitudinal axis A towards the opposite side member 2, 3, i.e.
- the bracket 13 advantageously extends from fixation portion 11' between the two pluralities of holes 12 defined by this latter and, more preferably, is placed substantially in the middle between the extremities of the fixation portion 11' along longitudinal axis A.
- the bracket 13 has a transversal cross-section that is ⁇ -shaped and essentially comprises a terminal portion 13' opposed to fixation portion 11' that is substantially a parallelepiped.
- the bracket 13 further defines a seat 13'' that is laterally delimited by a pair of protrusion 14', 14'' and that is opened from one side of bracket 13 with respect to axis A, in particular towards the electric axle 5.
- the seat 13'' is configured to accommodate a portion of a respective arm 8', 8'' of the V-rod 8 of the suspension system 4 and the protrusion 14', 14'' are configured to allow the connection of such arm 8', 8'' via a hinge connection 15.
- the seat 13'' is comprised in a transversal direction, i.e. along axis B, between the terminal portion 13' and the fixation portion 11'.
- the cross-member 10 can advantageously comprise a central element 17 suitable to be connected to the lateral element 11via their respective terminal portions 13'.
- the terminal portion 13' defines a plurality of holes 16, i.e.
- each connection element 19 essentially comprises a plate-like element realized in a material that is different with respect to the material of lateral elements 11.
- the lateral elements 11 are made of cast iron and they are made of a single piece and each connection element 19 is made of steel.
- each connection element 19 or their number or their overall shape may be varied to vary the stiffness of the cross-member 10, i.e. to vary the mechanical properties of the connection between the side members 2,3.
- Each lateral member 11 further define at least a fixation point 20 for allowing the fixation of the battery module 6 to the fixation portion 11', i.e. to the respective side member 2, 3.
- the fixation point 20 comprise a protuberance 21 that extends getting away from fixation portion 11 and defining a hole 22 (see figure 5) to allow the insertion of a fixation element such as a threaded element or a dowel.
- the fixation point 20 is realized laterally with respect to bracket 13, in particular in a rear portion with respect this latter along the direction of axis A and in the middle of the rear plurality of holes 12. Furthermore, the bracket 13 and the fixation point 20 are realized on the same side of the lateral element 11, i.e. both directed together towards the inner space defined by side members 2, 3. In this way, the opposite side of the lateral element 11 can be used to allow the fixation of this latter to the respective side member 2, 3.
- the operation of the described cross-member 10 is the following. When fixed via holes 12 to the respective side member 2, 3, the cross-member 10 can be used to securely fix the respective battery module 6 to the chassis 1 in a simple and quick way.
- the proposed cross-member 10 allows at the same time the connection in a transversal direction with respect to axis A of side members 2,3 and the securing of the battery module 6. Furthermore, the mounting of the battery module 6 is simplified because of the possibility of mounting separately the lateral elements 11 and, if present, the central element 17. Moreover, the central element 17 may be designed in order to vary the overall transversal stiffness of chassis 1, i.e. between the side members 2, 3. Indeed, a thicker central element 17 or a central element 17 comprising multiple connection elements 19 would provide a more stiff cross-member 10 and vice-versa.
- the above advantage is particularly useful in electric traction vehicles wherein the dimensions and weight of battery modules 6 may vary and therefore the stiffness required to the chassis 1 may vary accordingly.
- the fixation point 20 may have different shapes, allowing a plurality of fixation holes according to the specific fixation way of the battery module.
- the material and number of elements 19 of the central element 17 may be varied according to the design request of the heavy vehicle.
- the overall described portions of the cross- member 10 may be varied according to the typology of suspension system.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Body Structure For Vehicles (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21794649.0A EP4232307A1 (en) | 2020-10-22 | 2021-10-22 | Improved cross-member for a heavy vehicle suspension system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102020000025015 | 2020-10-22 | ||
IT102020000025015A IT202000025015A1 (en) | 2020-10-22 | 2020-10-22 | IMPROVED CROSSBEAM FOR A HEAVY VEHICLE SUSPENSION SYSTEM |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022084937A1 true WO2022084937A1 (en) | 2022-04-28 |
Family
ID=74068610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2021/059761 WO2022084937A1 (en) | 2020-10-22 | 2021-10-22 | Improved cross-member for a heavy vehicle suspension system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4232307A1 (en) |
IT (1) | IT202000025015A1 (en) |
WO (1) | WO2022084937A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024028767A1 (en) * | 2022-08-03 | 2024-02-08 | Iveco S.P.A. | Improved cross-member for a heavy vehicle suspension system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004062932A1 (en) * | 2004-12-28 | 2006-08-17 | Volkswagen Ag | Rear floor structure, for motor vehicle, has structure body, extended over entire vehicle width, which has structures realized as cast component in upper or lower load path planes as well as longitudinal and transverse load paths |
EP3121036A1 (en) * | 2015-07-23 | 2017-01-25 | Iveco Magirus Ag | Pneumatic axle suspension for a rear axle of a vehicle |
WO2020074105A1 (en) * | 2018-10-12 | 2020-04-16 | Volvo Truck Corporation | A battery pack arrangement for a vehicle |
-
2020
- 2020-10-22 IT IT102020000025015A patent/IT202000025015A1/en unknown
-
2021
- 2021-10-22 EP EP21794649.0A patent/EP4232307A1/en active Pending
- 2021-10-22 WO PCT/IB2021/059761 patent/WO2022084937A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004062932A1 (en) * | 2004-12-28 | 2006-08-17 | Volkswagen Ag | Rear floor structure, for motor vehicle, has structure body, extended over entire vehicle width, which has structures realized as cast component in upper or lower load path planes as well as longitudinal and transverse load paths |
EP3121036A1 (en) * | 2015-07-23 | 2017-01-25 | Iveco Magirus Ag | Pneumatic axle suspension for a rear axle of a vehicle |
WO2020074105A1 (en) * | 2018-10-12 | 2020-04-16 | Volvo Truck Corporation | A battery pack arrangement for a vehicle |
Also Published As
Publication number | Publication date |
---|---|
IT202000025015A1 (en) | 2022-04-22 |
EP4232307A1 (en) | 2023-08-30 |
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