EP2736739A1 - Axle for a motor vehicle - Google Patents

Axle for a motor vehicle

Info

Publication number
EP2736739A1
EP2736739A1 EP12733027.2A EP12733027A EP2736739A1 EP 2736739 A1 EP2736739 A1 EP 2736739A1 EP 12733027 A EP12733027 A EP 12733027A EP 2736739 A1 EP2736739 A1 EP 2736739A1
Authority
EP
European Patent Office
Prior art keywords
drive unit
wheel
vehicle axle
damper
trailing arm
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Withdrawn
Application number
EP12733027.2A
Other languages
German (de)
French (fr)
Inventor
Ulrich Mair
Stephan Pollmeyer
Martin Münster
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen 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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP2736739A1 publication Critical patent/EP2736739A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/001—Suspension arms, e.g. constructional features
    • 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
    • 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
    • B60B35/003—Steerable axles
    • 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
    • B60G21/04—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 mechanically
    • B60G21/05—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 mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/008—Attaching arms to unsprung part of vehicle
    • 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
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/52—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by DC-motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/40—Indexing codes relating to the wheels in the suspensions
    • B60G2200/422—Driving wheels or live axles
    • 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
    • B60G2204/124—Mounting of coil springs
    • B60G2204/1244—Mounting of coil springs on a suspension arm
    • 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
    • B60G2204/129—Damper mount on wheel suspension or knuckle
    • 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
    • B60G2204/20—Mounting of accessories, e.g. pump, compressor
    • B60G2204/201—Mounting of accessories, e.g. pump, compressor of fluid lines
    • 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
    • B60G2206/10—Constructional features of arms
    • B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
    • 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
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • 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
    • B60K2007/0061—Disposition of motor in, or adjacent to, traction wheel the motor axle being parallel to the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise
    • B60L2270/145—Structure borne vibrations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention relates to a vehicle axle, in particular torsion beam axle for an electric vehicle, comprising at least one trailing arm on which a wheel-proximate drive unit is arranged with an electric machine and a gear unit, wherein the radnahe drive unit has at least one supply line and with at least one damper.
  • the invention also relates to a motor vehicle with at least one vehicle axle.
  • Such vehicle axles are used in electric vehicles and serve both for suspending the respective wheels of the electric vehicle and for driving them.
  • the vehicle axle is supported, inter alia, by means of at least one damper on the body for damping the compression movement of the wheel or the wheels of the axle.
  • at least one supply line is usually arranged in order to provide the electrical machine of the drive unit close to the wheel with electrical energy, for example from accumulators, which are located at other positions within the electric vehicle.
  • An object of the present invention is therefore to provide a vehicle axle, which allows improved damping of the vehicle axle with the drive unit close to the wheel and at the same time a longer service life of the drive unit close to the wheel.
  • the invention solves the problem in a vehicle axle, in particular a torsion beam axle for an electric vehicle, comprising at least one trailing arm on which a radnahe drive unit is arranged with an electric machine and a transmission unit, wherein the radnahe drive unit has at least one supply line and with at least one damper in that the wheel-near drive unit is at least partially designed as a trailing arm and that the damping fer is connected with at least one side at least one-sided with the drive unit and with the at least other side with a body of the electric vehicle is connectable.
  • the invention also achieves the object in a motor vehicle having at least one vehicle axle in that the vehicle axle is designed according to at least one of claims 1 to 15.
  • the advantage achieved by the invention is that an improved power transmission from the vehicle axle to the body by means of the damper and thus an improved damping of the electric vehicle can be provided as a whole.
  • the vehicle axle is simple in construction and can therefore be carried out inexpensively.
  • the damper is fixed by means of a conical connection to the drive unit in the region of the trailing arm.
  • the screw can be screwed with a higher tightening torque. This improves the connection of the damper to the wheel-near drive unit: More force can be transmitted from the wheel-near drive unit by compression movements of the wheel on the damper. This achieves an improved damping effect.
  • the damper is fixed by means of a screw on the drive unit.
  • a cost-effective and at the same time extremely simple connection of the damper to the near-wheel drive unit is possible.
  • the drive unit has a through hole for receiving a screw of the screw connection. If a through hole is arranged, a maximum screw depth for the screw of the screw is provided. In this way, a particularly reliable screw is possible.
  • a seal is arranged in the region of the through bore.
  • the drive unit has an at least two-part housing, comprising a wheel-side housing section and a longitudinal housing-side housing half, and wherein the through-hole is arranged at least in the longitudinally-armature-side housing half.
  • housing half is essentially a two-part housing to understand, the housing halves do not necessarily have the same size, dimensions, etc. must have.
  • the damper can be fixed by means of the screw to both the wheel-side housing half and to the caliper-side housing half. Due to the through hole in the longitudinal arm side housing half this is also form-fitting and non-positively connected to the wheel-side housing half. An additional definition of the wheel-side and longitudinal arm side housing half in the damper is thereby avoided.
  • additional fasteners, such as holes, etc in the two-part housing of the wheel near drive unit are largely avoided.
  • the through hole is arranged in both housing halves and a screw of the screw connection is fixed by means of a nut in the region of the wheel-side housing half.
  • a different material can be used for the screw as for the housing of the gear unit and / or the drive unit:
  • a tightening torque of the screw must then not be adapted to the material of the housing of the wheel-side drive unit, but the material from which the screw and the mother are made.
  • a higher torque can be realized, for example, by screw and nut made of steel, the housing for weight saving made of aluminum.
  • the at least two-part housing is made of aluminum. In this way, the weight of the near-wheel drive unit can be reduced without reducing the rigidity and / or strength of the housing.
  • the damper is set in two sections on the drive unit. In this way, a more reliable determination of the damper on the wheel near drive unit is possible and the forces acting on the wheel near drive unit by compression movements of the wheel can be more effectively damped by the damper.
  • a spring plate is arranged on the electric machine in the drive unit and the damper on the one hand on the spring plate on the other hand fixed to the wheel-side housing half.
  • At least one fixing means for fixing the at least one supply line in the upper region of the trailing arm is arranged.
  • a supply line for example, cables, fluid-tight pipes, cables, etc are used.
  • the arrangement of the fixing element in the upper region of the trailing arm for the at least one supply line is provided in this area by the slight movement of the trailing arm relative to the body of the vehicle no or minimal mechanical stress on the supply line by bending or train. The service life of the supply lines is thus increased.
  • the fixing element comprises a bracket and / or a clamp.
  • the at least one supply line can be determined extremely inexpensive, whereas by means of a clamp a particularly simple and reliable determination of at least one supply line is possible.
  • the fixing element comprises a screw and / or clip connection.
  • a particularly cost-effective and at the same time easily detachable connection is provided. In maintenance trap this can be opened or solved and the at least one supply line to be replaced.
  • a guide element in particular a guide groove, arranged to guide the at least one supply line.
  • the assembly of the at least one supply line for the radnahe drive unit is further simplified.
  • an unwanted rubbing is thus avoided when several supply lines move through the up and down movement of the drive unit close to the wheel against each other and / or at least partially rotate. These are held by the guide member substantially in their respective predetermined position.
  • the guide element is integrally formed on the trailing arm.
  • the guide element can be produced extremely inexpensively together with the trailing arm. Additional complex manufacturing processes for the guide element and / or its determination on the trailing arm are thus avoided.
  • Fig. 1 shows a vehicle axle according to a first embodiment of the present invention in three-dimensional representation
  • FIG. 2a, 2b a further three-dimensional view of the vehicle axle according to
  • FIG. 1 and a partial cross section through the gear unit of the wheel-near drive unit according to FIG. 1.
  • Figure 1 shows a vehicle axle according to a first embodiment of the present invention in three-dimensional representation.
  • reference numeral 1 denotes a torsion beam axle.
  • the torsion beam axle 1 has a transverse profile 2, which extends essentially from bottom left to top right in FIG.
  • a trailing arm 3 is arranged on the right side of the transverse profile 2.
  • the trailing arm 3 is rotatable about a pivot point A on a body of an electric vehicle.
  • dampers over which an attenuation of the twist beam axle is provided.
  • the trailing arm 3 thus rotates about the articulation point A.
  • a wheel-near drive unit 56 is arranged, which is at least partially designed as a trailing arm 3 itself.
  • the drive unit 56 has an electric motor 5 and a gear unit 6.
  • the drive shaft of the electric motor 5 is connected via the gear unit 6 with a wheel shaft 20.
  • the wheel shaft 20 serves to drive a wheel of the electric vehicle.
  • the drive shaft of the electric motor 5 is arranged substantially parallel to the torsion beam axis 1 as well as the wheel shaft 20th
  • two terminals 10 are arranged, on which in turn supply lines 9 for supplying the radnahen drive unit with electrical energy and to provide coolant for cooling the electric motor 5 is arranged.
  • supply lines 9 for supplying the radnahen drive unit with electrical energy and to provide coolant for cooling the electric motor 5 is arranged.
  • bores 7b are provided parallel to the extension of the transverse profile 2.
  • a bracket 8 can be arranged and fixed by means of screws 7a in the holes 7b. The bracket 8 serves to clamp the supply 9 in the region of the torsion beam axis 1, in which the lowest possible load by bending or train on the supply lines 9 occurs upon rotation of the trailing arm to the pivot point A.
  • the holes 7b may be formed as threaded holes.
  • the bores 7b can also be arranged directly in the region of the trailing arm 3. It is also possible instead of the bracket 8 to provide a clamp which at least partially, preferably completely covers the profile of the trailing arm 3 and thus sets the supply lines 9 in the upper region 3 a of the trailing arm 3. Finally, the supply lines 9 are still at least partially fixed by means of guide grooves 7c on the upper side of the trailing arm 3.
  • the guide grooves 7c serve, on the one hand, to prevent the supply lines 9 from rubbing against each other during a compression movement of the torsion-beam axle 1, thus damaging the supply lines 9.
  • the guide groove 7c also allows for easier mounting of the bracket 8, since the supply lines 9 are held in predetermined positions and can then be set more easily by means of the bracket 8.
  • the bracket 8 is provided in Figure 1 substantially with bulges or a wave-shaped cross-sectional profile, so that the supply lines 9 are also fixed by means of the bracket 8 in addition in its desired position in compression movements of the twist beam axle 1 substantially.
  • the drive unit 56 comprises - as already stated above - a gear unit 6.
  • the gear unit 6 comprises a two-part housing 1 1, 12 with a wheel-side housing 1 1 and a trailing arm housing 12th
  • the damper 15 is fixed to the trailing arm housing 12 via an eyelet 14 with a screw 13.
  • the damper 15 is screwed in particular via a conical connection 1 6 with the trailing arm housing 12 via the screw 13.
  • a spring plate 19 projecting perpendicularly to the wheel shaft 20 is furthermore arranged on the side facing away from the transverse profile 2, that is to say on the side of the damper 15.
  • the spring plate 19 serves to receive a spring, which then on the body of the electric vehicle as well as the damper 15 for damping the movement of the wheel of the electric vehicle or the Ver. Bundle 1 is determined.
  • the damper 15 is one-way with trailing arm housing 12 fixed. It is also possible to define the damper 15 in two sections, that is, on the one hand to frictionally connect with the trailing arm housing 12 on the other hand with the spring plate 19. Thus, even more reliable connection of the damper 15 to the wheel-near drive unit 56 and thus to the torsion-beam axle 1 is possible.
  • FIG. 2b now shows the wheel-proximate drive unit 56 in the region of the gear unit 6 in cross-section.
  • the eye 14 of the damper 15 can be seen.
  • the damper 15 is by means of the screw 3, which is inserted through the eyelet 14 and through the through hole 17, into a threaded hole 17 a, which is milled into the wheel-side housing 1 1, screwed and the damper 15 so frictionally with the wheel near drive unit 56th and the trailing arm 3 set.
  • the screw 13 is formed as a conical connection 1 6.
  • the threaded hole 17a in the wheel-side housing 1 1 can be arranged in the wheel-side housing 1 1 also has a through hole.
  • the screw 13 then fully engages through the eye 14 of the damper 15, through the through hole 17 of the trailing arm housing 12 and through the through hole of the wheel-side housing 1 1 and is fastened on the side of the wheel-side housing 1 1 by means of a nut 20.
  • a surface seal is disposed in the region between the wheel-side housing 1 1 and the trailing arm housing 12.
  • the invention has, inter alia, the advantage that, on the one hand, connection lines for a wheel-proximal drive unit can be arranged in the region of the vehicle axle such that they are subjected to as little mechanical loading as possible by compression movements of the wheel of the vehicle axle. As a result, the life of the supply lines and their attachment to terminals of the drive unit near the wheel is substantially increased.
  • offers the invention has the advantage of providing a simple, cost-effective and reliable connection of a damper to a wheel-near drive unit of an electric vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention relates to a vehicle axle, in particular a twist-beam axle for an electric vehicle, comprising at least one trailing arm, on which is arranged a drive unit which is located in the vicinity of a wheel and has an electric motor and a gear unit, wherein the wheel-vicinity drive unit has at least one supply line, and at least one damper, wherein the wheel-vicinity drive unit is designed, at least in part, as a trailing arm, and wherein the damper has at least one side connected, at least by a single-shear connection, to the drive unit and can have the at least other side connected to a body of the electric vehicle. The invention likewise relates to a motor vehicle having at least one axle.

Description

Fahrzeuqachse für ein Kraftfahrzeug  Vehicle axle for a motor vehicle
Die Erfindung betrifft eine Fahrzeugachse, insbesondere Verbundlenkerachse für ein Elektrofahrzeug, umfassend zumindest einen Längslenker, an dem eine radnahe Antriebseinheit mit einer elektrischen Maschine und einer Getriebeeinheit angeordnet ist, wobei die radnahe Antriebseinheit zumindest eine Versorgungsleitung aufweist und mit zumindest einem Dämpfer. Die Erfindung betrifft ebenfalls ein Kraftfahrzeug mit zumindest einer Fahrzeugachse. The invention relates to a vehicle axle, in particular torsion beam axle for an electric vehicle, comprising at least one trailing arm on which a wheel-proximate drive unit is arranged with an electric machine and a gear unit, wherein the radnahe drive unit has at least one supply line and with at least one damper. The invention also relates to a motor vehicle with at least one vehicle axle.
Derartige Fahrzeugachsen werden in Elektrofahrzeugen eingesetzt und dienen sowohl zur Aufhängung der jeweiligen Räder des Elektrofahrzeugs als auch zu deren Antrieb. Die Fahrzeugachse wird dabei unter anderem mittels zumindest einem Dämpfer an der Karosserie zur Dämpfung der Einfederbewegung des Rades oder der Räder der Achse abgestützt. Für die radnahe Antriebseinheit ist üblicherweise zumindest eine Versorgungsleitung angeordnet, um der elektrische Maschine der radnahen Antriebseinheit elektrische Energie, beispielsweise von Akkumulatoren, welche sich an anderen Positionen innerhalb des Elektrofahrzeugs befinden, bereitzustellen. Such vehicle axles are used in electric vehicles and serve both for suspending the respective wheels of the electric vehicle and for driving them. The vehicle axle is supported, inter alia, by means of at least one damper on the body for damping the compression movement of the wheel or the wheels of the axle. For the near-wheel drive unit, at least one supply line is usually arranged in order to provide the electrical machine of the drive unit close to the wheel with electrical energy, for example from accumulators, which are located at other positions within the electric vehicle.
Durch die radnahe Anordnung der Antriebseinheit an der Fahrzeugachse ist diese stärkeren Hub- und Stoßbewegungen durch Einfederbewegungen des jeweiligen Rades des Elektrofahrzeugs ausgesetzt. Due to the close-to-wheel arrangement of the drive unit to the vehicle axle, this stronger lifting and pushing movements is exposed by compression movements of the respective wheel of the electric vehicle.
Eine Aufgabe der vorliegenden Erfindung ist es daher, eine Fahrzeugachse bereitzustellen, welche eine verbesserte Dämpfung der Fahrzeugachse mit der radnahen Antriebseinheit und gleichzeitig eine längere Lebensdauer der radnahen Antriebseinheit ermöglicht. An object of the present invention is therefore to provide a vehicle axle, which allows improved damping of the vehicle axle with the drive unit close to the wheel and at the same time a longer service life of the drive unit close to the wheel.
Die Erfindung löst die Aufgabe, bei einer Fahrzeugachse, insbesondere einer Verbundlenkerachse für ein Elektrofahrzeug, umfassend zumindest einen Längslenker, an dem eine radnahe Antriebseinheit mit einer elektrischen Maschine und einer Getriebeeinheit angeordnet ist, wobei die radnahe Antriebseinheit zumindest eine Versorgungsleitung aufweist und mit zumindest einem Dämpfer dadurch, dass die radnahe Antriebseinheit zumindest teilweise als Längslenker ausgebildet ist und dass der Dämp- fer mit zumindest einer Seite zumindest einschnittig mit der Antriebseinheit verbunden ist und mit der zumindest anderen Seite mit einer Karosserie des Elektrofahrzeugs verbindbar ist. The invention solves the problem in a vehicle axle, in particular a torsion beam axle for an electric vehicle, comprising at least one trailing arm on which a radnahe drive unit is arranged with an electric machine and a transmission unit, wherein the radnahe drive unit has at least one supply line and with at least one damper in that the wheel-near drive unit is at least partially designed as a trailing arm and that the damping fer is connected with at least one side at least one-sided with the drive unit and with the at least other side with a body of the electric vehicle is connectable.
Die Erfindung löst die Aufgabe ebenfalls bei einem Kraftfahrzeug mit zumindest einer Fahrzeugachse dadurch, dass die Fahrzeugachse gemäß zumindest einem der Ansprüche 1 -15 ausgebildet ist. The invention also achieves the object in a motor vehicle having at least one vehicle axle in that the vehicle axle is designed according to at least one of claims 1 to 15.
Der mit der Erfindung erzielte Vorteil ist, dass damit eine verbesserte Kraftübertragung von der Fahrzeugachse auf die Karosserie mittels des Dämpfers und damit eine verbesserte Dämpfung des Elektrofahrzeugs insgesamt bereitgestellt werden kann. Darüber hinaus ist die Fahrzeugachse einfach im Aufbau und kann damit kostengünstig ausgeführt werden. The advantage achieved by the invention is that an improved power transmission from the vehicle axle to the body by means of the damper and thus an improved damping of the electric vehicle can be provided as a whole. In addition, the vehicle axle is simple in construction and can therefore be carried out inexpensively.
Weitere vorteilhafte Ausführungsformen, Merkmale und Vorteile der Erfindung sind in den Unteransprüchen beschrieben. Further advantageous embodiments, features and advantages of the invention are described in the subclaims.
Zweckmäßigerweise ist der Dämpfer mittels einer kegeligen Verbindung an der Antriebseinheit im Bereich des Längslenkers festgelegt. Der damit erzielte Vorteil ist, dass bei einer Festlegung des Dämpfers beispielsweise mittels einer Schraube, die Schraube mit einem höheren Anzugdrehmoment eingedreht werden kann. Dies verbessert die Anbindung des Dämpfers an der radnahen Antriebseinheit: Mehr Kraft kann von der radnahen Antriebseinheit durch Einfederbewegungen des Rades auf den Dämpfer übertragen werden. Damit wird eine verbesserte Dämpfwirkung erzielt. Conveniently, the damper is fixed by means of a conical connection to the drive unit in the region of the trailing arm. The advantage thus achieved is that in a determination of the damper, for example by means of a screw, the screw can be screwed with a higher tightening torque. This improves the connection of the damper to the wheel-near drive unit: More force can be transmitted from the wheel-near drive unit by compression movements of the wheel on the damper. This achieves an improved damping effect.
Vorteilhafterweise ist der Dämpfer mittels einer Schraubverbindung an der Antriebseinheit festgelegt. Auf diese Weise ist eine kostengünstige und zugleich äußerst einfache Anbindung des Dämpfers an der radnahen Antriebseinheit möglich. Advantageously, the damper is fixed by means of a screw on the drive unit. In this way, a cost-effective and at the same time extremely simple connection of the damper to the near-wheel drive unit is possible.
Zweckmäßigerweise weist die Antriebseinheit eine Durchgangsbohrung zur Aufnahme einer Schraube der Schraubverbindung auf. Wird eine Durchgangsbohrung angeordnet, wird eine maximale Einschraubtiefe für die Schraube der Schraubverbindung bereitgestellt. Auf diese Weise wird eine besonders zuverlässige Schraubverbindung ermöglicht. Conveniently, the drive unit has a through hole for receiving a screw of the screw connection. If a through hole is arranged, a maximum screw depth for the screw of the screw is provided. In this way, a particularly reliable screw is possible.
Vorteilhafterweise ist im Bereich der Durchgangsbohrung eine Dichtung angeordnet. Damit kann ein eventueller Ölaustritt aus der Getriebeeinheit der radnahen Antriebseinheit über die Durchgangsbohrung vermieden werden, so dass Öl aus einem Ölkreislauf der Getriebeeinheit nicht über die Durchgangsbohrung leckt. Advantageously, a seal is arranged in the region of the through bore. Thus, a possible oil leakage from the gear unit of the near-wheel drive unit can be avoided through the through hole, so that oil from an oil circuit of the gear unit does not leak through the through hole.
Zweckmäßigerweise weist die Antriebseinheit ein zumindest zweiteiliges Gehäuse auf, umfassend eine radseitige und eine längsienkerseitige Gehäusehälfte und wobei die Durchgangsbohrung zumindest in der längslenkerseitigen Gehäusehälfte angeordnet ist. Unter Gehäusehälfte ist im Wesentlichen ein zweigeteiltes Gehäuse zu verstehen, wobei die Gehäusehälften nicht notwendigerweise gleiche Größe, Abmessungen, etc. aufweisen müssen. Weist die radseitige Gehäusehälfte eine Gewindebohrung auf, kann der Dämpfer mittels der Schraube sowohl an der radseitigen Gehäusehälfte als auch an der längslenkerseitigen Gehäusehälfte festgelegt werden. Aufgrund der Durchgangsbohrung in der längslenkerseitigen Gehäusehälfte wird diese auch selbst mit der radseitigen Gehäusehälfte form- und kraftschlüssig verbunden. Eine zusätzliche Festlegung von radseitiger und längslenkerseitiger Gehäusehälfte im Bereich des Dämpfers wird dadurch vermieden. Ebenso werden zusätzliche Verbindungselemente, wie Bohrungen, etc im zweiteiligen Gehäuse der radnahen Antriebseinheit weitestgehend vermieden. Expediently, the drive unit has an at least two-part housing, comprising a wheel-side housing section and a longitudinal housing-side housing half, and wherein the through-hole is arranged at least in the longitudinally-armature-side housing half. By housing half is essentially a two-part housing to understand, the housing halves do not necessarily have the same size, dimensions, etc. must have. If the wheel-side housing half has a threaded bore, the damper can be fixed by means of the screw to both the wheel-side housing half and to the caliper-side housing half. Due to the through hole in the longitudinal arm side housing half this is also form-fitting and non-positively connected to the wheel-side housing half. An additional definition of the wheel-side and longitudinal arm side housing half in the damper is thereby avoided. Likewise, additional fasteners, such as holes, etc in the two-part housing of the wheel near drive unit are largely avoided.
Vorteilhafterweise ist die Durchgangsbohrung in beiden Gehäusehälften angeordnet und eine Schraube der Schraubverbindung ist mittels einer Mutter im Bereich der radseitigen Gehäusehälfte festgelegt. Auf diese Weise kann für die Schraubverbindung ein anderes Material eingesetzt werden als für das Gehäuse der Getriebeeinheit und/oder der Antriebseinheit: Ein Anzugsmoment der Schraube muss dann nicht dem Material des Gehäuses der radseitigen Antriebseinheit angepasst werden, sondern dem Material, aus dem die Schraube und die Mutter hergestellt sind. Damit lässt sich ein höheres Anzugsmoment realisieren, indem beispielsweise Schraube und Mutter aus Stahl, das Gehäuse zur Gewichtsersparnis aus Aluminium hergestellt ist. Zweckmäßigerweise ist das zumindest zweiteilige Gehäuse aus Aluminium hergestellt. Auf diese Weise kann das Gewicht der radnahen Antriebseinheit gesenkt werden ohne die Steifigkeit und/oder Festigkeit des Gehäuses zu reduzieren. Advantageously, the through hole is arranged in both housing halves and a screw of the screw connection is fixed by means of a nut in the region of the wheel-side housing half. In this way, a different material can be used for the screw as for the housing of the gear unit and / or the drive unit: A tightening torque of the screw must then not be adapted to the material of the housing of the wheel-side drive unit, but the material from which the screw and the mother are made. Thus, a higher torque can be realized, for example, by screw and nut made of steel, the housing for weight saving made of aluminum. Conveniently, the at least two-part housing is made of aluminum. In this way, the weight of the near-wheel drive unit can be reduced without reducing the rigidity and / or strength of the housing.
Vorteilhafterweise ist der Dämpfer zweischnittig an der Antriebseinheit festgelegt. Auf diese Weise ist auch eine zuverlässigere Festlegung des Dämpfers an der rad nahen Antriebseinheit möglich und die Kräfte, die auf die radnahe Antriebseinheit durch Einfederbewegungen des Rades wirken, können noch effektiver durch den Dämpfer gedämpft werden. Advantageously, the damper is set in two sections on the drive unit. In this way, a more reliable determination of the damper on the wheel near drive unit is possible and the forces acting on the wheel near drive unit by compression movements of the wheel can be more effectively damped by the damper.
Zweckmäßigerweise ist ein Federteller an der elektrischen Maschine in der Antriebseinheit angeordnet und der Dämpfer einerseits am Federteller andererseits an der radseitigen Gehäusehälfte festgelegt. Dies hat den Vorteil, dass damit zusätzliche Bauteile für eine zweischnittige Anbindung des Dämpfers an der radnahen Antriebseinheit entfallen können. Die Fahrzeugachse kann damit kostengünstiger hergestellt werden. Conveniently, a spring plate is arranged on the electric machine in the drive unit and the damper on the one hand on the spring plate on the other hand fixed to the wheel-side housing half. This has the advantage that it can account for additional components for a zweignittige connection of the damper to the near-wheel drive unit. The vehicle axle can thus be produced more cheaply.
Vorteilhafterweise ist zumindest ein Festlegungsmittel zur Festlegung der zumindest einen Versorgungsleitung im oberen Bereich des Längslenkers angeordnet. Als Versorgungsleitung können beispielsweise Kabel, fluiddichte Rohre, Leitungen, etc dienen. Durch die Anordnung des Festlegungselements im oberen Bereich des Längslenkers für die zumindest eine Versorgungsleitung wird in diesem Bereich durch die geringe Bewegung des Längslenkers relativ zu der Karosserie des Fahrzeugs keine bzw. eine minimale mechanische Belastung der Versorgungsleitung durch Biegen oder Zug bereitgestellt. Die Lebensdauer der Versorgungsleitungen wird damit erhöht. Advantageously, at least one fixing means for fixing the at least one supply line in the upper region of the trailing arm is arranged. As a supply line, for example, cables, fluid-tight pipes, cables, etc are used. The arrangement of the fixing element in the upper region of the trailing arm for the at least one supply line is provided in this area by the slight movement of the trailing arm relative to the body of the vehicle no or minimal mechanical stress on the supply line by bending or train. The service life of the supply lines is thus increased.
Zweckmäßigerweise umfasst das Festlegungselement einen Bügel und/oder eine Schelle. Mittels eines Bügels kann die zumindest eine Versorgungsleitung äußerst kostengünstig festgelegt werden, wohingegen mittels einer Schelle eine besonders einfache und zuverlässige Festlegung der zumindest einen Versorgungsleitung möglich ist. Conveniently, the fixing element comprises a bracket and / or a clamp. By means of a bracket, the at least one supply line can be determined extremely inexpensive, whereas by means of a clamp a particularly simple and reliable determination of at least one supply line is possible.
Vorteilhafterweise umfasst das Festlegungselement eine Schraub- und/oder Clipsverbindung. Bei einer Schraub- und/oder Clipsverbindung wird eine besonders kostengünstige und gleichzeitig einfach lösbare Verbindung bereitgestellt. Im Wartungs- falle kann diese geöffnet oder gelöst werden und die zumindest eine Versorgungsleitung ausgetauscht werden. Advantageously, the fixing element comprises a screw and / or clip connection. In a screw and / or clip connection, a particularly cost-effective and at the same time easily detachable connection is provided. In maintenance trap this can be opened or solved and the at least one supply line to be replaced.
Zweckmäßigerweise ist ein Führungselement, insbesondere eine Führungsnut, zur Führung der zumindest einen Versorgungsleitung angeordnet. Damit wird die Montage der zumindest einen Versorgungsleitung für die radnahe Antriebseinheit noch weiter vereinfacht. Gleichzeitig wird damit auch ein ungewolltes Reiben vermieden, wenn mehrere Versorgungsleitungen durch die Auf- und Abbewegung der radnahen Antriebseinheit sich gegeneinander bewegen und/oder zumindest teilweise verdrehen. Diese werden durch das Führungselement im Wesentlichen in ihrer jeweiligen vorbestimmten Position gehalten. Conveniently, a guide element, in particular a guide groove, arranged to guide the at least one supply line. Thus, the assembly of the at least one supply line for the radnahe drive unit is further simplified. At the same time an unwanted rubbing is thus avoided when several supply lines move through the up and down movement of the drive unit close to the wheel against each other and / or at least partially rotate. These are held by the guide member substantially in their respective predetermined position.
Vorteilhafterweise ist das Führungselement am Längslenker angeformt. Auf diese Weise kann das Führungselement äußerst kostengünstig zusammen mit dem Längslenker hergestellt werden. Zusätzliche aufwändige Herstellungsprozesse für das Führungselement und/oder dessen Festlegung am Längslenker werden damit vermieden. Advantageously, the guide element is integrally formed on the trailing arm. In this way, the guide element can be produced extremely inexpensively together with the trailing arm. Additional complex manufacturing processes for the guide element and / or its determination on the trailing arm are thus avoided.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der dazugehörigen Figurenbeschreibung anhand der Zeichnungen. Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated description of the figures with reference to the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen. It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Bauteile oder E- lemente beziehen. Preferred embodiments of the invention are illustrated in the drawings and will be explained in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components or ele- ments.
Dabei zeigt jeweils in schematischer Form Fig. 1 eine Fahrzeugachse gemäß einer ersten Ausführungsform der vorliegenden Erfindung in dreidimensionaler Darstellung und It shows each in a schematic form Fig. 1 shows a vehicle axle according to a first embodiment of the present invention in three-dimensional representation and
Fig. 2a, 2b eine weitere dreidimensionale Ansicht der Fahrzeugachse gemäß Fig. 2a, 2b, a further three-dimensional view of the vehicle axle according to
Figur 1 und einen teilweisen Querschnitt durch die Getriebeeinheit der radnahen Antriebseinheit gemäß Figur 1 .  FIG. 1 and a partial cross section through the gear unit of the wheel-near drive unit according to FIG. 1.
Figur 1 zeigt eine Fahrzeugachse gemäß einer ersten Ausführungsform der vorliegenden Erfindung in dreidimensionaler Darstellung. Figure 1 shows a vehicle axle according to a first embodiment of the present invention in three-dimensional representation.
In Figur 1 bezeichnet Bezugszeichen 1 eine Verbundlenkerachse. Die Verbundlenkerachse 1 weist ein Querprofil 2 auf, das sich in Figur 1 im Wesentlichen von links unten nach rechts oben erstreckt. An der rechten Seite des Querprofils 2 ist ein Längslenker 3 angeordnet. Der Längslenker 3 ist dabei an einer Karosserie eines Elektrofahr- zeugs um einen Anlenkpunkt A drehbar. Nicht gezeigt sind Dämpfer, über die eine Dämpfung der Verbundlenkerachse bereitgestellt wird. Bei einer Einfederbewegung des Rades dreht sich der Längslenker 3 also um den Anlenkpunkt A. Auf der der Öse 4 gegenüberliegenden Seite ist eine radnahe Antriebseinheit 56 angeordnet, die zumindest teilweise als Längslenker 3 selbst ausgebildet ist. Die Antriebseinheit 56 weist dabei einen Elektromotor 5 und eine Getriebeeinheit 6 auf. Die Antriebswelle des Elektromotors 5 ist über die Getriebeeinheit 6 mit einer Radwelle 20 verbunden. Die Radwelle 20 dient zum Antrieb eines Rades des Elektrofahrzeugs. Die Antriebswelle des Elektromotors 5 ist dabei im Wesentlichen parallel zur Verbundlenkerachse 1 angeordnet wie auch die Radwelle 20. In FIG. 1, reference numeral 1 denotes a torsion beam axle. The torsion beam axle 1 has a transverse profile 2, which extends essentially from bottom left to top right in FIG. On the right side of the transverse profile 2, a trailing arm 3 is arranged. The trailing arm 3 is rotatable about a pivot point A on a body of an electric vehicle. Not shown are dampers, over which an attenuation of the twist beam axle is provided. In a compression movement of the wheel, the trailing arm 3 thus rotates about the articulation point A. On the opposite side of the eyelet 4 a wheel-near drive unit 56 is arranged, which is at least partially designed as a trailing arm 3 itself. The drive unit 56 has an electric motor 5 and a gear unit 6. The drive shaft of the electric motor 5 is connected via the gear unit 6 with a wheel shaft 20. The wheel shaft 20 serves to drive a wheel of the electric vehicle. The drive shaft of the electric motor 5 is arranged substantially parallel to the torsion beam axis 1 as well as the wheel shaft 20th
Auf der Oberseite des Elektromotors 5 und im Wesentlichen senkrecht zur Verbundlenkerachse 1 sind zwei Anschlüsse 10 angeordnet, an denen wiederum Versorgungsleitungen 9 zur Versorgung der radnahen Antriebseinheit mit elektrischer Energie und zur Bereitstellung von Kühlmittel zur Kühlung des Elektromotors 5 angeordnet. Auf der Oberseite 3a des Längslenkers 3 und im stirnseitigen Bereich des Querprofils 2 sind parallel zur Erstreckung des Querprofils 2 Bohrungen 7b vorgesehen. Zwischen den Bohrungen 7b kann ein Bügel 8 angeordnet werden und mittels Schrauben 7a in den Bohrungen 7b fixiert werden. Der Bügel 8 dient dabei zum Festklemmen der Versor- gungsleitungen 9 in dem Bereich der Verbundlenkerachse 1 , in dem eine möglichst geringe Belastung durch Biegung oder Zug auf die Versorgungsleitungen 9 bei einer Drehung des Längslenkers um den Anlenkpunkt A auftritt. On the upper side of the electric motor 5 and substantially perpendicular to the torsion beam axis 1, two terminals 10 are arranged, on which in turn supply lines 9 for supplying the radnahen drive unit with electrical energy and to provide coolant for cooling the electric motor 5 is arranged. On the upper side 3a of the trailing arm 3 and in the frontal region of the transverse profile 2, bores 7b are provided parallel to the extension of the transverse profile 2. Between the holes 7b, a bracket 8 can be arranged and fixed by means of screws 7a in the holes 7b. The bracket 8 serves to clamp the supply 9 in the region of the torsion beam axis 1, in which the lowest possible load by bending or train on the supply lines 9 occurs upon rotation of the trailing arm to the pivot point A.
Die Bohrungen 7b können als Gewindebohrungen ausgebildet sein. Die Bohrungen 7b können auch direkt im Bereich des Längslenkers 3 angeordnet werden. Es ist ebenso möglich anstelle des Bügels 8 eine Schelle vorzusehen, welche das Profil des Längslenkers 3 zumindest teilweise, vorzugsweise vollständig umfasst und so die Versorgungsleitungen 9 im oberen Bereich 3a des Längslenkers 3 festlegt. Schließlich sind die Versorgungsleitungen 9 noch mittels Führungsnuten 7c auf der Oberseite des Längslenkers 3 zumindest teilweise fixiert. Die Führungsnuten 7c dienen zum einen dazu, dass die Versorgungsleitungen 9 bei einer Einfederbewegung der Verbundlenkerachse 1 nicht gegeneinander reiben und so die Versorgungsleitungen 9 beschädigen. Zum anderen ermöglicht die Führungsnut 7c auch eine einfachere Montage des Bügels 8, da die Versorgungsleitungen 9 so in vorbestimmten Positionen gehalten werden und dann einfacher mittels des Bügels 8 festgelegt werden können. Der Bügel 8 ist in Figur 1 im Wesentlichen mit Ausbuchtungen oder einem wellenförmigen Querschnittsprofil versehen, so dass die Versorgungsleitungen 9 auch mittels des Bügels 8 zusätzlich in ihrer gewünschten Position bei Einfederbewegungen der Verbundlenkerachse 1 im Wesentlichen festgelegt werden. The holes 7b may be formed as threaded holes. The bores 7b can also be arranged directly in the region of the trailing arm 3. It is also possible instead of the bracket 8 to provide a clamp which at least partially, preferably completely covers the profile of the trailing arm 3 and thus sets the supply lines 9 in the upper region 3 a of the trailing arm 3. Finally, the supply lines 9 are still at least partially fixed by means of guide grooves 7c on the upper side of the trailing arm 3. The guide grooves 7c serve, on the one hand, to prevent the supply lines 9 from rubbing against each other during a compression movement of the torsion-beam axle 1, thus damaging the supply lines 9. On the other hand, the guide groove 7c also allows for easier mounting of the bracket 8, since the supply lines 9 are held in predetermined positions and can then be set more easily by means of the bracket 8. The bracket 8 is provided in Figure 1 substantially with bulges or a wave-shaped cross-sectional profile, so that the supply lines 9 are also fixed by means of the bracket 8 in addition in its desired position in compression movements of the twist beam axle 1 substantially.
Figur 2a zeigt nun die Verbundlenkerachse 1 mit Blickrichtung auf die Antriebseinheit 56. Die Antriebseinheit 56 umfasst - wie bereits vorstehend ausgeführt - eine Getriebeeinheit 6. Die Getriebeeinheit 6 umfasst dabei ein zweiteiliges Gehäuse 1 1 , 12 mit einem radseitigen Gehäuse 1 1 und einem Längslenkergehäuse 12. Im unteren Bereich des Längslenkergehäuses 12 ist der Dämpfer 15 über eine Öse 14 mit einer Schraube 13 an dem Längslenkergehäuse 12 festgelegt. Der Dämpfer 15 ist insbesondere über eine kegelige Verbindung 1 6 mit dem Längslenkergehäuse 12 über die Schraube 13 verschraubt. Im Bereich des Elektromotors 5 ist weiter ein senkrecht zur Radwelle 20 vorstehender Federteller 19 auf der dem Querprofil 2 abgewandten Seite, also auf der Seite des Dämpfers 15 angeordnet. Der Federteller 19 dient zur Aufnahme einer Feder, die dann an der Karosserie des Elektrofahrzeugs ebenso wie der Dämpfer 15 zur Dämpfung der Bewegung des Rades des Elektrofahrzeugs bzw. der Ver- bundlenkerachse 1 festgelegt wird. In Figur 2a ist der Dämpfer 15 einschnittig mit Längslenkergehäuse 12 festgelegt. Es ist ebenso möglich, den Dämpfer 15 zweischnittig festzulegen, also einerseits mit dem Längslenkergehäuse 12 andererseits mit dem Federteller 19 kraftschlüssig zu verbinden. Damit ist eine noch zuverlässigere Anbin- dung des Dämpfers 15 an der radnahen Antriebseinheit 56 und damit an der Verbundlenkerachse 1 möglich. The drive unit 56 comprises - as already stated above - a gear unit 6. The gear unit 6 comprises a two-part housing 1 1, 12 with a wheel-side housing 1 1 and a trailing arm housing 12th In the lower region of the trailing arm housing 12, the damper 15 is fixed to the trailing arm housing 12 via an eyelet 14 with a screw 13. The damper 15 is screwed in particular via a conical connection 1 6 with the trailing arm housing 12 via the screw 13. In the area of the electric motor 5, a spring plate 19 projecting perpendicularly to the wheel shaft 20 is furthermore arranged on the side facing away from the transverse profile 2, that is to say on the side of the damper 15. The spring plate 19 serves to receive a spring, which then on the body of the electric vehicle as well as the damper 15 for damping the movement of the wheel of the electric vehicle or the Ver. Bundle 1 is determined. In Figure 2a, the damper 15 is one-way with trailing arm housing 12 fixed. It is also possible to define the damper 15 in two sections, that is, on the one hand to frictionally connect with the trailing arm housing 12 on the other hand with the spring plate 19. Thus, even more reliable connection of the damper 15 to the wheel-near drive unit 56 and thus to the torsion-beam axle 1 is possible.
Figur 2b zeigt nun die radnahe Antriebseinheit 56 im Bereich der Getriebeeinheit 6 im Querschnitt. Im unteren Bereich der Getriebeeinheit 6 ist die Öse 14 des Dämpfers 15 zu erkennen. Der Dämpfer 15 wird mittels der Schraube 3, die durch die Öse 14 sowie durch die Durchgangsbohrung 17 hindurch gesteckt ist, in eine Gewindebohrung 17a, welche in das radseitige Gehäuse 1 1 gefräst ist, eingedreht und der Dämpfer 15 so kraftschlüssig mit der radnahen Antriebseinheit 56 und dem Längslenker 3 festgelegt. Die Schraubverbindung 13 ist dabei als kegelige Verbindung 1 6 ausgebildet. FIG. 2b now shows the wheel-proximate drive unit 56 in the region of the gear unit 6 in cross-section. In the lower part of the gear unit 6, the eye 14 of the damper 15 can be seen. The damper 15 is by means of the screw 3, which is inserted through the eyelet 14 and through the through hole 17, into a threaded hole 17 a, which is milled into the wheel-side housing 1 1, screwed and the damper 15 so frictionally with the wheel near drive unit 56th and the trailing arm 3 set. The screw 13 is formed as a conical connection 1 6.
Anstelle der Gewindebohrung 17a im radseitigen Gehäuse 1 1 kann im radseitigen Gehäuse 1 1 ebenfalls eine Durchgangsbohrung angeordnet sein. Die Schraube 13 greift dann vollständig durch die Öse 14 des Dämpfers 15, über die Durchgangsbohrung 17 des Längslenkergehäuses 12 und über die Durchgangsbohrung des radseitigen Gehäuses 1 1 hindurch und wird auf der Seite des radseitigen Gehäuses 1 1 mittels einer Mutter 20 befestigt. Instead of the threaded hole 17a in the wheel-side housing 1 1 can be arranged in the wheel-side housing 1 1 also has a through hole. The screw 13 then fully engages through the eye 14 of the damper 15, through the through hole 17 of the trailing arm housing 12 and through the through hole of the wheel-side housing 1 1 and is fastened on the side of the wheel-side housing 1 1 by means of a nut 20.
Um einen eventuellen Ölaustritt über die Durchgangsbohrung 17 und die Gewindebohrung 17a zu vermeiden, ist im Bereich zwischen dem radseitigen Gehäuse 1 1 und dem Längslenkergehäuse 12 eine Flächendichtung angeordnet. In order to avoid any oil leakage through the through hole 17 and the threaded hole 17 a, a surface seal is disposed in the region between the wheel-side housing 1 1 and the trailing arm housing 12.
Zusammenfassend weist die Erfindung unter anderem den Vorteil auf, dass zum einen Verbindungsleitungen für eine radnahe Antriebseinheit im Bereich der Fahrzeugachse so angeordnet werden können, dass diese mit möglichst kleinen mechanischen Belastungen durch Einfederbewegungen des Rades der Fahrzeugachse beaufschlagt werden. Dadurch wird die Lebensdauer der Versorgungsleitungen und ihrer Festlegung an Anschlüssen der radnahen Antriebseinheit wesentlich erhöht. Darüber hinaus bietet die Erfindung den Vorteil, eine einfache, kostengünstige und zuverlässige Anbindung eines Dämpfers eine radnahe Antriebseinheit eines Elektrofahrzeugs zur Verfügung bereitzustellen. In summary, the invention has, inter alia, the advantage that, on the one hand, connection lines for a wheel-proximal drive unit can be arranged in the region of the vehicle axle such that they are subjected to as little mechanical loading as possible by compression movements of the wheel of the vehicle axle. As a result, the life of the supply lines and their attachment to terminals of the drive unit near the wheel is substantially increased. In addition, offers the invention has the advantage of providing a simple, cost-effective and reliable connection of a damper to a wheel-near drive unit of an electric vehicle.
Obwohl die vorliegende Erfindung vorstehend anhand bevorzugter Ausführungsbeispiele beschrieben wurde, ist sie nicht darauf beschränkt, sondern auf vielfältige Weise modifizierbar. Although the present invention has been described above with reference to preferred embodiments, it is not limited thereto, but modifiable in many ways.
Bezuqszeichen REFERENCE CHARACTERS
Verbundlenkerachse Beam axle
Querprofil  cross Section
Längslenker Trailing arm
a Längslenkeroberseite  a trailing arm upper side
Öse Anlenkpunkt Karosserie  Eye articulation point body
Elektromotor  electric motor
Getriebeeinheit gear unit
6 Antriebseinheit 6 drive unit
a Schrauben a screws
b Bohrungen  b holes
7c Führungsnut  7c guide groove
8 Bügel  8 stirrups
9 Versorgungsleitung  9 supply line
10 Anschluss  10 connection
1 1 radseitiges Gehäuse  1 1 wheel-sided housing
12 Längslenkergehäuse  12 trailing arm housing
13 Schraube  13 screw
14 Öse Dämpfer  14 eye damper
15 Dämpfer  15 dampers
16 kegelige Verbindung  16 conical connection
17 Durchgangsbohrung  17 Through hole
17a Gewindebohrung  17a threaded hole
18 Dichtung  18 seal
19 Federteller  19 spring plate
20 Radwelle  20 wheel shaft
A Anlenkpunkt  A link point

Claims

Patentansprüche claims
1 . Fahrzeugachse (1 ), insbesondere Verbundlenkerachse, für ein Elektrofahr- zeug, umfassend zumindest einen Längslenker (3), an dem eine radnahe Antriebseinheit (56) mit einer elektrischen Maschine (5) und einer Getriebeeinheit (6) angeordnet ist, wobei die radnahe Antriebseinheit (56) zumindest eine Versorgungsleitung (9) aufweist und mit zumindest einem Dämpfer (15), dadurch gekennzeichnet, dass die rad nahe Antriebseinheit (56) zumindest teilweise als Längslenker (3) ausgebildet ist und dass der Dämpfer (15) mit zumindest einer Seite zumindest einschnittig mit der Antriebseinheit (56) verbunden und mit der zumindest anderen Seite mit einer Karosserie des Elektrofahrzeugs verbindbar ist. 1 . Vehicle axle (1), in particular torsion beam axle, for an electric vehicle, comprising at least one trailing arm (3) on which a wheel-proximate drive unit (56) with an electric machine (5) and a gear unit (6) is arranged, wherein the wheel-proximate drive unit (56) has at least one supply line (9) and with at least one damper (15), characterized in that the wheel near drive unit (56) is at least partially designed as a trailing arm (3) and that the damper (15) with at least one side connected at least in one piece to the drive unit (56) and connectable to the at least one other side with a body of the electric vehicle.
2. Fahrzeugachse (1 ) gemäß Anspruch 1 , dadurch gekennzeichnet, dass der Dämpfer (1 5) mittels einer kegeligen Verbindung (1 6) an der Antriebseinheit (56) im Bereich des Längslenkers (3) festgelegt ist. 2. Vehicle axle (1) according to claim 1, characterized in that the damper (1 5) by means of a conical connection (1 6) on the drive unit (56) in the region of the trailing arm (3) is fixed.
3. Fahrzeugachse gemäß Anspruch 2, dadurch gekennzeichnet, dass der Dämpfer (15) mittels einer Schraubverbindung (13) an der Antriebseinheit (56) festgelegt ist. 3. Vehicle axle according to claim 2, characterized in that the damper (15) by means of a screw connection (13) on the drive unit (56) is fixed.
4. Fahrzeugachse gemäß zumindest einen der Ansprüche 1 -3, dadurch gekennzeichnet, dass die Antriebseinheit (56) eine Durchgangsbohrung (17) zur Aufnahme einer Schraube der Schraubverbindung (13) aufweist. 4. Vehicle axle according to at least one of claims 1 -3, characterized in that the drive unit (56) has a through hole (17) for receiving a screw of the screw connection (13).
5. Fahrzeugachse gemäß zumindest einem der Ansprüche 1 -4, dadurch gekennzeichnet, dass im Bereich der Durchgangsbohrung (17) eine Dichtung (18) angeordnet ist. 5. Vehicle axle according to at least one of claims 1 -4, characterized in that in the region of the through hole (17) a seal (18) is arranged.
6. Fahrzeugachse gemäß zumindest einem der Ansprüche 4-5, dadurch gekennzeichnet, dass die Antriebseinheit (56) ein zumindest zweiteiliges Gehäuse (1 1 , 12) aufweist, umfassend eine radseitige und eine längslenkerseitige Gehäusehälfte (1 1 , 12), und wobei die Durchgangsbohrung (17) zumindest in der längslenkerseitigen Gehäusehälfte (12) angeordnet ist. 6. A vehicle axle according to at least one of claims 4-5, characterized in that the drive unit (56) has an at least two-part housing (1 1, 12), comprising a wheel-side and an arm-side housing half (1 1, 12), and wherein the Through hole (17) is arranged at least in the longitudinal arm side housing half (12).
7. Fahrzeugachse gemäß Anspruch 6, dadurch gekennzeichnet, dass die Durchgangsbohrung (17) in beiden Gehäusehälften (1 1 , 12) angeordnet ist, und dass eine Schraube der Schraubverbindung (13) mittels einer Mutter im Bereich der radseitigen Gehäusehälfte (1 1 ) festgelegt ist. 7. Vehicle axle according to claim 6, characterized in that the through hole (17) in both housing halves (1 1, 12) is arranged, and that a screw of the screw (13) by means of a nut in the region of the wheel-side housing half (1 1) determined is.
8. Fahrzeugachse gemäß zumindest einem der Ansprüche 1 -7, dadurch gekennzeichnet, dass das zumindest zweiteilige Gehäuse (1 1 , 12) aus Aluminium hergestellt ist. 8. Vehicle axle according to at least one of claims 1 -7, characterized in that the at least two-part housing (1 1, 12) is made of aluminum.
9. Fahrzeugachse gemäß zumindest einem der Ansprüche 1 -8, dadurch gekennzeichnet, dass der Dämpfer (15) zweischnittig an der Antriebseinheit (56) festgelegt ist. 9. Vehicle axle according to at least one of claims 1-8, characterized in that the damper (15) is fixed in two sections on the drive unit (56).
10. Fahrzeugachse gemäß Anspruch 9, dadurch gekennzeichnet, dass ein Federteller (19) an der elektrischen Maschine (5) der Antriebseinheit (56) angeordnet ist, und der Dämpfer (15) einerseits am Federteller (19), andererseits an der radseitigen Gehäusehälfte (1 1 ) festgelegt ist. 10. A vehicle axle according to claim 9, characterized in that a spring plate (19) on the electric machine (5) of the drive unit (56) is arranged, and the damper (15) on the one hand on the spring plate (19), on the other hand on the wheel-side housing half ( 1 1) is fixed.
1 1 . Fahrzeugachse gemäß zumindest einem der Ansprüche 1 -10, dadurch gekennzeichnet, dass zumindest ein Festlegungselement (7a, 7b, 8) zur Festlegung der zumindest einen Versorgungsleitung (9) im oberen Bereich des Längslenkers (3) insbesondere an der schwenkbaren Verbindung (4) zwischen Längslenker und Karosserie angeordnet ist. 1 1. Vehicle axle according to at least one of claims 1 to 10, characterized in that at least one fixing element (7a, 7b, 8) for fixing the at least one supply line (9) in the upper region of the trailing arm (3) in particular on the pivotable connection (4) between Trailing arm and body is arranged.
12. Fahrzeugachse gemäß Anspruch 1 1 , dadurch gekennzeichnet, dass das Festlegungselement (7a, 7b, 8) einen Bügel (8) und/oder eine Schelle umfasst. 12. Vehicle axle according to claim 1 1, characterized in that the fixing element (7a, 7b, 8) comprises a bracket (8) and / or a clamp.
13. Fahrzeugachse gemäß zumindest einem der Ansprüche 1 1 -12, dadurch gekennzeichnet, dass das Festlegungselement (7a, 7b, 8) eine Schraub- und/oder Clipsverbindung umfasst. 13. Vehicle axle according to at least one of claims 1 1 -12, characterized in that the fixing element (7 a, 7 b, 8) comprises a screw and / or clip connection.
14. Fahrzeugachse gemäß zumindest einem der Ansprüche 1 -13, dadurch gekennzeichnet, dass ein Führungselement (7c), insbesondere eine Führungsnut, zur Führung der zumindest einen Versorgungsleitung (9) angeordnet ist 14. Vehicle axle according to at least one of claims 1 -13, characterized in that a guide element (7c), in particular a guide groove, for guiding the at least one supply line (9) is arranged
15. Fahrzeugachse gemäß Anspruch 14, dadurch gekennzeichnet, dass das Führungselement (7c) am Längslenker (3) angeformt ist. 15. Vehicle axle according to claim 14, characterized in that the guide element (7c) on the trailing arm (3) is integrally formed.
1 6. Kraftfahrzeug mit zumindest einer Fahrzeugachse (1 ), dadurch gekennzeichnet, dass die Fahrzeugachse (1 ) gemäß zumindest einem der Ansprüche 1 -15 ausgebildet ist. 1 6. A motor vehicle with at least one vehicle axle (1), characterized in that the vehicle axle (1) according to at least one of claims 1 -15 is formed.
EP12733027.2A 2011-07-28 2012-06-27 Axle for a motor vehicle Withdrawn EP2736739A1 (en)

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DE102011080037A DE102011080037A1 (en) 2011-07-28 2011-07-28 Vehicle axle for a motor vehicle
PCT/EP2012/062400 WO2013013920A1 (en) 2011-07-28 2012-06-27 Axle for a motor vehicle

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EP (1) EP2736739A1 (en)
CN (1) CN103717419A (en)
DE (1) DE102011080037A1 (en)
WO (1) WO2013013920A1 (en)

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WO2013013920A1 (en) 2013-01-31
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DE102011080037A1 (en) 2013-01-31
US9045029B2 (en) 2015-06-02

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