EP3475677A1 - Sub-assembly for an output unit, output unit, drive train test stand and modular system - Google Patents
Sub-assembly for an output unit, output unit, drive train test stand and modular systemInfo
- Publication number
- EP3475677A1 EP3475677A1 EP17700940.4A EP17700940A EP3475677A1 EP 3475677 A1 EP3475677 A1 EP 3475677A1 EP 17700940 A EP17700940 A EP 17700940A EP 3475677 A1 EP3475677 A1 EP 3475677A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output unit
- subassemblies
- subassembly
- drive train
- functional
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
Definitions
- the invention relates to a subassembly for an output unit according to the preamble of claim 1, an output unit for a powertrain test stand according to the preamble of claim 1 1, a powertrain test stand for testing a motor vehicle drive train according to the preamble of claim 13 and a modular system according to the preamble of claim 14.
- Transmission test stands or powertrain test stands for testing motor vehicle transmissions or complete motor vehicle drive trains are known from the prior art.
- test rigs are used to detect malfunctions in the powertrain early through a series of load tests. Typical malfunctions arise e.g. by game-related components, such.
- gears, synchronizer rings, synchronizer body, multi-plate clutch discs and waves that can be deflected or even excited to vibrate As part of the functional testing usually the acoustic behavior and the shift quality are tested.
- such test stands but also in the development and continuous improvement of motor vehicle powertrains and in particular motor vehicle transmissions use. Particular attention is usually paid here to the fatigue strength and the basic development of new technical principles of action.
- DE 10 2012 018 359 A1 describes a driving cycle for a driving simulation, which is traversed by a real motor vehicle on a chassis dynamometer.
- the drive train of the motor vehicle works in such a way that the wheel speed of the motor vehicle corresponds to the respective speed specification of the driving cycle, without the motor vehicle actually moving. This allows a testing of the motor vehicle drive train after installation in the motor vehicle.
- DE 43 28 537 C2 discloses a transmission test rig with a first, serving as a drive motor servomotor and a second, serving as a brake motor Servomotor.
- the first drive motor is connected via a clutch with the drive shaft of a motor vehicle transmission to be tested and is controlled in terms of its speed via a PC, with any speed curves can be simulated.
- the brake motor is connected via a further clutch to an output shaft of the motor vehicle transmission to be tested.
- the speed of the second motor is also controlled via the PC.
- the speed curves simulated by the PC are speed curves measured in real driving tests.
- the motor vehicle transmission according to DE 43 28 537 C2 can also be checked before installation in a motor vehicle.
- the known powertrain test stands are disadvantageous in that they are either not suitable for testing a motor vehicle drive train prior to installation in a vehicle or that they are designed specifically and exclusively for a particular type of motor vehicle drive trains with regard to the design of their mechanical load capacity and their dynamic behavior.
- the latter powertrain test stands are not very flexible in terms of their use, which makes them appear economically unattractive in connection with the relatively high cost.
- the invention relates to a subassembly for an output unit.
- the subassembly according to the invention is characterized in that the subassembly has a normalized interface for connection to at least one further subassembly for the same output unit.
- the subassemblies according to the invention can also preferably be released from one another at their interfaces, individual subassemblies can, if required, also be removed from the output unit and replaced by other subassemblies.
- the output unit can also be adapted quickly and flexibly to the für personnel Park, etc. This significantly reduces the time and cost required to produce a driveline adapted output unit.
- normalized interface is understood to mean an interface which is standardized to the extent that it permits a connection to all possible elements or subassemblies which likewise have a corresponding normalized interface
- the normalized interface may be designed as a flange connection with normalized perforated ring or as a matched plug-socket connection.
- any configurations of the interfaces of the subassemblies are conceivable as long as they are only standardized to that effect are that they allow a connection to the subunits, which also have the unified or normalized interface.
- the output unit is preferably an output unit for a powertrain test stand, wherein the powertrain test stand is suitable for testing a motor vehicle drive train outside a vehicle.
- the subassembly is assigned to a functional class of subassemblies, wherein subassemblies of a functional class fulfill identical functions and differ from each other at least in their maximum deliverable power, their mechanical strength, their dimensions and / or their dynamic behavior.
- this subassembly can be easily connected to the other subassemblies.
- the subassemblies of a functional class can also differ by the ease of use provided by them as well as the set-up times.
- the subassemblies are assigned to the functional classes of lifting devices, lifting tables, adjusting devices, wheeled machines, cardan machines, brakes, protective devices, base plates and connecting strands. It has been found that such functional classes meet the functions usually required. By suitable selection and combination of subassemblies from the different, required functional classes, it is thus possible to produce a power take-off unit which is adapted to the particular requirements present.
- the subassemblies of the function class lifting devices as electrically or hydraulically height-adjustable or crane height adjustable lifting devices are formed. This makes it possible to adapt the output unit with regard to its height to the motor vehicle drive train to be tested or to other requirements resulting from the test rig structure.
- a lifting device preferably has at least four columns on which further subassemblies can be arranged.
- a height adjustment of the lifting device is then in the form of an adjustment of the arrangement height of the other subassemblies on the columns.
- electrical height adjustability is understood to be a height adjustment effected by one or more electric motors.
- the electric motor or the electric motors drive one or more spindle gear, which change the set height of the lifting device in a row.
- hydraulic height adjustability is understood to mean either a height adjustment effected by one or more hydraulic cylinders or else a height adjustment effected by one or more hydraulic motors.
- the hydraulic cylinders can be pressurized with a suitable pressure fluid to increase a set height. Conversely, pressurized fluid can be removed from the hydraulic cylinder or cylinders to reduce the set height again.
- crane height adjustability is understood to mean height adjustability by placing shim pieces in a guide provided for this purpose. This allows successively increasing or decreasing the set height in height steps corresponding to the height of the shims.
- the subassemblies of the functional class wheel machines and the subassemblies of the functional class propeller machines are designed as three-phase motors, as synchronous motors or as DC motors.
- Three-phase motors are relatively inexpensive, but do not have a comparable high rotational dynamics as synchronous motors. Also comparatively inexpensive are DC motors, with even DC motors having only a small rotational dynamics.
- the subassemblies of the functional class wheel machines and the subassemblies of the functional class propeller machines comprise, in addition to the three-phase motor, the synchronous motor or the DC motor, a converter which is specifically adapted specifically to the three-phase motor, the synchronous motor or the DC motor. Particularly preferably, the converter also specifies a limitation of the maximum electrical current that can be supplied.
- the subassemblies of the functional classes of wheeled machines and cardan machines serve as drive units which act on the output shafts of a motor vehicle drive train to be tested with counter torques.
- the wheel machines thereby simulate the behavior of a driven wheel on a wheel output shaft of the motor vehicle drive train to be tested connected to the output unit.
- the wheel machine comprises an electric motor designed as a three-phase motor, as a synchronous motor or as a DC motor, which acts on the wheel output shaft in the driven vehicle drivetrain state with counter torques in order to test the behavior of the motor vehicle drive train to be tested under load.
- the propulsion machines do not simulate the behavior of a single driven wheel, but the behavior of a driven axle, wherein an axle output shaft of the motor vehicle powertrain to be tested is connected to the propeller.
- the cardan machine also includes a designed as a three-phase motor, a synchronous motor or DC motor electric motor, the electric motor of the Kardan masch preferred, however, is designed for higher speeds and lower torques than the electric motor of the wheel.
- the electric motor of the cardan machine loads the axle output shaft with defined counter torques.
- the wheel machine or the cardan machine are preferably arranged on a base plate, which is e.g. via bores a standardized interface for connection to the wheel or Kardanmaschine provides.
- the wheel machine or the cardan machine it is air-cooled or water-cooled or combined air- and water-cooled.
- the subassemblies of the functional class brakes are designed as disc brakes. Since motor vehicles usually have disc brakes, the use of disc brakes makes it possible to test the motor vehicle drive train to be tested as realistically as possible by the output unit. In addition, disc brakes are comparatively reliable, compact, low-maintenance and cost-effective. The presence of a brake also allows the defined blocking of an output shaft of the motor vehicle drive train to be tested and the behavior of the motor vehicle drive train to be blocked. In addition, the brake can also be used as a mounting brake, in particular to block a three-phase motor of a wheel or Kardanmaschine and thus to allow safe mounting, set-up or maintenance on the output unit.
- the subassemblies of the functional class protective devices are designed as form-adapted cover plates.
- the protective devices advantageously fulfill the function of shielding or covering rapidly rotating parts, such as a drive train of the output unit, against contact and, in particular, against unintentional contact.
- the protection primarily protects the operator of the output unit from injury by the output unit.
- the protective devices are each adapted to such shape that subassemblies to be shielded or covered by the protective devices are difficult to access.
- the subassemblies of the functional class connecting strands each comprise one or more of the elements coupling flange and / or measuring flange and / or blocking and / or safety coupling and / or shaft bearing.
- the coupling flange serves to rotatably couple the drive train of the output unit with the output shaft of the motor vehicle drive train to be tested.
- the measuring flange serves to detect torques acting on the drive train. This is necessary in order to check the load-dependent behavior of the motor vehicle drive train to be tested.
- the blocking serves to block a rotational movement of the drive train.
- assembly, set-up or maintenance work on the output unit can be made or it can also the behavior of the motor vehicle powertrain to be tested in a complete blockage of an output shaft of the motor vehicle powertrain are tested.
- the blocking may be provided in addition to a brake or alternatively to a brake.
- the Blocking be used to calibrate a possibly existing measuring flange.
- the safety clutch is used to disconnect the drive train or the output unit from the output shaft of the motor vehicle drive train in an overload and thus protect both the motor vehicle drive train and the output unit from damage due to overload.
- the shaft bearing is used in particular when using a cardan for rotatory storage of the connecting strand and thus to avoid the formation of vibrations on the connecting strand.
- the subassemblies of the functional class adjusting devices comprise at least one positioning cylinder and a guide rail.
- the adjusting device allows an adjustment of the output unit in the sense of a displacement of the output unit in the longitudinal or lateral direction, that is to say a translational movement.
- the output unit may be e.g. be aligned with an output shaft of the motor vehicle powertrain to be tested.
- the positioning cylinder is the actuator, which applies the necessary force for movement or adjustment.
- the guide rail guides the displaced subassemblies along the direction predetermined by the guide rail.
- the adjusting device does not adjust the complete output unit but only some of the subassemblies of the output unit, e.g. the drive train and the wheel machine as well as the base plate.
- the base plate is not longitudinally adjustable relative to the lifting table, if a subassembly of the functional class propulsion machines is used as the drive unit.
- a longitudinal adjustment of the base plate such that the base plate protrudes with a part of the connecting strand on the lifting table, would otherwise due to the high possible Speeds of the propeller lead to a strong vibration excitation of the connecting strand.
- the base plate can be arranged longitudinally adjustable relative to the lifting table.
- the drive train test stand according to the invention can be adapted particularly easily to a track width of the motor vehicle drive train to be tested.
- the positioning cylinder is preferably designed as a hydraulic cylinder, which causes the adjustment of the lifting device by means of an application of pressure fluid.
- the positioning cylinder is designed as an electric cylinder, which causes an adjusting movement of the lifting device by means of an electric motor acting on a threaded spindle.
- Both the electric motor and the threaded spindle may be e.g. be enclosed by an outer shell of the electric cylinder. However, it can also be dispensed with the outer shell.
- the guide rail is preferably designed as a T-slot.
- the adjusting device comprises not only a positioning cylinder and a guide rail, but two positioning cylinder and two guide rails.
- the two guide rails are horizontal and mutually orthogonal, so that an adjustment in both the longitudinal and in the lateral direction is possible.
- two positioning cylinders are aligned to move the output unit longitudinally and laterally along the two guide rails.
- the subassemblies of the functional class lifting tables are adapted to hydraulically clamp or release the base plates.
- the Base plate and arranged on the base sub-assemblies are clamped or fixed or loosened by means of a hydraulic actuator.
- the base plate can be offset by the hydraulic actuation in the other state.
- the base plate in the ground state can be clamped mechanically spring-loaded. A hydraulic actuation would counteract the clamping in this case and hydraulically release the base plate.
- the subassemblies of the functional class lifting tables are designed to clamp the base plates electromechanically or to solve.
- the clamping or fixing is necessary in order to avoid a generation of vibrations due to the comparatively high acting forces and moments during a test procedure.
- the lifting tables are designed to clamp the base plate manually, e.g. by manually tightening clamping screws.
- the invention also relates to an output unit for a powertrain test stand comprising a plurality of subassemblies.
- the output unit according to the invention is characterized in that the subassemblies are subassemblies according to the invention. This leads to the advantages already described in connection with the subassemblies according to the invention also for the output unit according to the invention.
- the output unit from a functional class does not comprise more than one subassembly. Since all subassemblies of the same functional class perform an identical function, it is advantageously not necessary to use more than one subassembly per functional class. It is preferably provided that bearing surfaces of the output unit are provided on a substructure of the output unit with slideways made of plastic. This favors a power-efficient and precise adjustment of the output unit. Another advantage lies in the high system rigidity that results from the slideways for the output unit. The occurrence of vibrations can thus be largely avoided.
- the contact surfaces of the substructure, which are in contact with the output unit are provided with slide tracks made of plastic. This simplifies the adjustment of the output unit even further, without favoring the occurrence of unwanted vibrations of the output unit.
- the slideways e.g. by means of two-component adhesive
- the slideways are glued to the guide rails or on the bearing surfaces of the output unit or the substructure and then milled.
- the over-milling ensures a particularly smooth and uniform surface, which in turn further favors a power-efficient and precise adjustment of the output unit.
- the rigidity of the connection is improved by the over-milling and the associated additional smoothing.
- the invention relates to a powertrain test stand for testing a motor vehicle drive train.
- the drive train test stand according to the invention is characterized in that the drive train test bench comprises an output unit according to the invention. This results in the advantages already described in connection with the output unit according to the invention also for the drive train test stand according to the invention.
- a powertrain is preferably understood to mean passenger car transmissions, truck transmissions, commercial vehicle transmissions, construction vehicle transmissions, bus transmissions and off-road vehicle transmissions, internal combustion engines, electric motors, axle systems, shaft systems or torsional vibration damping systems.
- the powertrain test bench is preferably designed for testing a motor vehicle drive train outside a vehicle.
- the invention relates to a modular system for easily producing a demand-adapted output unit for a powertrain test bench, comprising a plurality of functional classes of subassemblies, the functional classes each comprising a plurality of functionally identical but differently dimensioned subassemblies.
- the modular system according to the invention is characterized in that the output unit is an output unit according to the invention.
- the modular system according to the invention thus makes it possible in a simple, fast and cost-effective manner to produce a demand-adapted output unit for a drive train test bench.
- FIG. 4 shows by way of example two different embodiments of lifting tables
- FIG. 5 shows by way of example a wheel machine and a cardan machine
- FIG. 7 shows by way of example a blockage, a shaft bearing and a safety coupling of a drive train
- FIG. 8 shows by way of example two differently constructed connecting strands
- FIG. 9 shows examples of different embodiments of a protective device
- FIG. 10 shows by way of example a possible embodiment of a brake
- FIG. 1 shows examples of various possible configurations of a powertrain test stand according to the invention.
- Identical objects, functional units and comparable components are denoted by the same reference numerals across the figures. These objects, functional units and comparable components are identical in terms of their technical features, unless the description explicitly or otherwise implies otherwise.
- the output unit 1 shows by way of example a possible construction of an output unit 1 according to the invention for a drive train test bench (not shown in FIG. 1).
- the output unit 1 comprises a plurality of subassemblies 2, 3, 4, 5, 6, 7, 8, 9, wherein the subassemblies 2, 3, 4, 5, 6, 7, 8 each have a normalized interface to the mechanical, electrical or hydraulic connection with a further subassembly 2, 3, 4, 5, 6, 7, 8, 9 of the output unit 1 have.
- the normalized interface allows an almost arbitrary combination of subassemblies 2, 3, 4, 5, 6, 7, 8, 9 to an output unit.
- a respective demand-driven and drive train-specific adapted output unit 1 from a subassembly 2, 3, 4, 5, 6, 7, 8, 9 comprehensive modular system can be created.
- the output unit 1 shown comprises a lifting device 2, a lifting table 3, an adjusting device 4, a wheel machine 5, a connecting strand 6, a protective device 7, a brake 8 and a base plate 9.
- the lifting device 2 is electrically height adjustable and forms a base on which all other subassemblies 3, 4, 5, 6, 7, 8, 9 are constructed.
- the lifting device 2 itself can in turn be arranged on a designated anchoring point of the drive train test stand.
- the guide columns 11, 11 ', 11 ", 11"' serve as a guide for the lifting table 3, with which they are connected via standardized flange 13, 13 ', 13 ", 13"' as an interface.
- the actual height adjustment takes place via the adjustment columns 10, 10 ', 10 ", 10"', which, for example, each comprise an electric motor driven spindle gear, which causes the height adjustment. Also, a compound of the adjustment columns 10, 10 ', 10 ", 10"' with the lifting table 3 is normalized.
- the adjusting device 4 comprises, for example, an electric cylinder 4 'and guide rails 4 ", 4"', which each have a T-slot.
- the electric cylinder 4 'does not include, for example shown threaded spindle and also not shown, acting on the threaded spindle electric motor. Via an actuation of the electric cylinder 4 ', a lateral displacement of the output unit 1 along the guide rails 4 ", 4"' is possible.
- a longitudinal displacement of the output unit 1 is manually possible, for example.
- the clamping screws 12, 12 ', 12 ", 12"' must be solved, so that the output unit 1 can be moved manually. Subsequently, the clamping screws 12, 12 ', 12 ", 12”' are tightened again to secure the output unit 1 against the occurrence of vibrations during the test operation.
- a base plate 9 is hydraulically releasably clamped by means of terminals 3 ', 3 ", 3"', 3 "", 3, 3 clamped. Via a manually actuable hydraulic cylinder 33, a hydraulic pressure can be generated which releases the clamps 3 ', 3 ", 3"', 3 "", 3, 3.
- the terminals 3 ', 3 ", 3"', 3 "", 3, 3 form a standardized interface between the lifting table 3 and the base plate 9.
- the terminals 3 ', 3 ", 3"', 3 "" , 3, 3 spring loaded clamped. By a hydraulic actuation they can be solved.
- any other base plate 9 originating from the modular system according to the invention could also be clamped with standardized interface on the lifting table 9 by means of the clamps 3 ', 3 ", 3"', 3 "", 3, 3.
- the wheel machine 5 is arranged, which is formed according to the example as a three-phase machine.
- the wheel machine 5 Via standardized screw connections 14, 14 ', 14 ", 14"' as an interface, the wheel machine 5 is connected to the base plate 9.
- the wheel machine 5 is also rotatably connected to a connecting strand 6.
- the connecting strand 6 in turn is rotatably connected to an output shaft of a motor vehicle powertrain to be tested.
- the protective device 7 is connected to the base plate 9 via further standardized screw connections 32, 32 ', 32 ", 32"' as an interface.
- the brake 8 is connected to a shaft of the wheel machine 5 and designed as a disc brake 8. This connection is normalized, ie, that just as well any other brake 8 from the modular system according to the invention with the shaft of the wheel machine 5 can be connected.
- FIG. 2 shows a further possible embodiment of an output unit 1 according to the invention.
- the output unit 1 of FIG. 2 differs from the output unit 1 of FIG. 1 by its design to another motor vehicle drive strand type.
- the lifting device 2 is exclusively manually on the guide rails 4 ', 4 ", 4"', 4 "", 4, 4 slidably.
- the output unit 1 of FIG. 2 does not have a wheel machine 5, but via a cardan masch ine 15, which is designed as a three-phase motor.
- the connecting strand 6 is adapted to the comparatively higher speeds of the propeller 15.
- the protective device 7 is adapted to the comparatively longer connecting strand 6.
- FIG. 3 shows, by way of example, two different forms of embodiment of lifting devices 2.
- the lifting device 2 of FIG. 3 a is designed as an electrically height-adjustable lifting device 2. It has four guide columns 1, 1 ', 1 1 ", 1 1"', which in turn each have a normalized flange connection 13, 13 ', 13 ", 13"' as an interface to a lifting table 3. Furthermore, the lifting device 2 of Fig. 3a four adjustment columns 10, 10 ', 10 ", 10"', which include, for example according to an electric motor driven spindle gear, which causes the height adjustment. The spindle gear of the adjustment columns 10, 10 ', 10 ", 10”' are thereby driven by a common electric motor 16 via cardan shafts 17, 17 ', 17 ", 17"'.
- FIG. 3b shows a crane-height-adjustable lifting device 2.
- the flange connections 13, 13 ', 13 ", 13"' of the guide columns 11, 11 ', 11', 11 '" are formed by the laying-on of shims in a designated guide 18, 18 ', 18 ", 18"'. This allows a gradual increase or decrease of the set height, wherein the step size of the height steps is dependent on the height of the shims.
- FIG. 4 shows two different embodiments of lifting tables 3.
- the lifting table 3 of FIG. 4 a is designed, for example, to mechanically clamp a base plate 9 (not shown in FIG. 4 a).
- the lifting table 3 4a mechanically operable terminals 3 ', 3 ", 3"', 3 "", 3, 3, ie, the terminals 3 ', 3 ", 3"', 3 "", 3, 3 can by manual screws be clamped so that they clamp the base plate 9 in a certain position.
- the terminals 3 ', 3 ", 3"', 3 "", 3, 3 can also be released again, so that they release the base plate 9 again.
- the illustrated lifting table 3 of FIG. 4a comprises electric cylinders 19, which can move the base plate 9 longitudinally. This allows a longitudinal alignment of the output unit 1 to an output shaft of the motor vehicle drive train to be tested. It also simplifies set-up and maintenance.
- FIG. 4b shows another possible embodiment of a lifting table 3.
- the lifting table 3 of FIG. 4b comprises hydraulically releasable clamps 3 ', 3 ", 3"', 3 "", 3, 3
- clamps 3 ', 3 ", 3"', 3 "", 3, 3 are spring-loaded clamped in the ground state and are hydraulically releasable by means of an actuation of a hydraulic cylinder 33.
- the lifting table 3 of FIG. 4b also comprises an electric cylinder 19 in order to align the output unit 1 longitudinally with an output shaft of the motor vehicle drive train to be tested. Likewise, set-up and maintenance are simplified.
- Fig. 5a shows an example of a wheel machine 5, which is designed as a three-phase motor and can be cooled by means of water. Three-phase motors are relatively inexpensive, but have only a limited dynamic behavior.
- the illustrated wheel machine 5 is mounted on a base plate 9.
- Fig. 5b shows an example of a gimbal 15, which is designed as a three-phase motor and has a combined water-air cooling.
- the gimbal machine shown in Fig. 5b is mounted on a base plate 9.
- the base plate 9 has standardized dimensions in the lateral direction in order to mount the base plate 9 by means of the standardized clamps 3 ', 3 ", 3"', 3 "", 3, 3 to clamp a lifting table 3. Also the dimensioning of the holes shown is standardized to connect, for example, a wheel machine 5 or a propeller 15 of the modular system according to the invention with the base plate 9 can.
- Fig. 7 shows by way of example a blocking 20 (Fig. 7a), a shaft bearing 21 (Fig. 7b) and a safety coupling 22 (Fig. 7c) of a connecting strand 6.
- the blocking 20 serves to prevent the connecting strand 6 from rotating and thus eg Maintenance work or set-up work must be carried out safely for the operating personnel.
- the blocking 20 allows a calibration of a measuring flange.
- the two levers 20 ', 20 "shown can engage in a groove 25', 25", 25 "', 25” "in a flange 25 of the connecting strand 6.
- the shaft bearing 21 serves this purpose, in particular in gimbal machines 15
- the safety clutch 22 serves to automatically disconnect the output unit 1 from the output shaft of the motor vehicle drive train to be tested in the event of an overload situation and thus damage the output unit 1 or the motor vehicle drive train avoid.
- FIG. 8 shows, by way of example, a measuring flange 27 for measuring a transmitted torque and a transmitted rotational speed, as well as a blocking flange 25 with grooves 25 ', 25 ", 25"', 25 “'.
- the reading of the measuring flange 27 takes place without contact via an antenna base 26.
- the levers 20 ', 20 can engage in the grooves 25', 25", 25 "', 25"' of the blocking in order to block the blocking flange 25.
- the drive train 6 of FIG. 8b shows by way of example a further possible construction of a connecting strand 6.
- the connecting strand 6 of FIG. 8b comprises a measuring flange 27 and a blocking flange 25.
- the measuring flange 27 of FIG. 8b is, for example, a comparatively simpler and less expensive embodiment than the measuring flange 27 of FIG. 8a.
- the measuring flange 27 also has an antenna base 26 in order to enable contactless reading of the measuring flange 27.
- Fig. 9 shows an example of different embodiments of a protective device 7.
- the protective device 7 is shown in Figs. 9a to 9e each formed as a form-fitting cover plate, wherein the embodiments of Figs. 9a to 9e differ primarily by their longitudinal length, which is adapted in each case to the length of the connecting strand 6 to be shielded.
- Fig. 10 shows an example of a possible embodiment of a brake 8 as a hydraulically actuated disc brake 8.
- the disc brake 8 allows on the one hand the realistic loading of the connecting strand 6 with defined braking torques and on the other hand blocking the connecting strand 6 and checking the behavior of the motor vehicle powertrain on the blocking.
- the disc brake 8 can also be used as a mounting brake, in particular to block a three-phase motor of a wheeled machine 5 or gimbal 15 and thus allow safe assembly, set-up or maintenance of the output unit 1.
- FIG. 1 shows, by way of example, various possible configurations of a roadway test bench 28 according to the invention for testing a motor vehicle drive train 29, comprising a transmission 34 and an axle output shaft 31.
- the Antnebsstrangprüfstands 28 of FIG. 1 1 a consists of a drive unit 30 and an output unit 1 according to the invention.
- the drive train test stand 28 of FIG. 11a consists of a drive unit 1 and an output unit 22.
- the motor vehicle drive train 29 to be tested is arranged in terms of drive between the drive unit 30 and the output unit 1. About the axle output shaft 31 of the motor vehicle drive train 29 is connected to the drive unit 1.
- the drive unit 30 generates a drive torque and transmits it to the motor vehicle drive train 29.
- the transmission 34 converts the drive torque and passes it on to the output unit 1 via the axle output shaft 31.
- the output unit 1 simulates a driven axle. Consequently, the output unit 1 of FIG. 1 1 a includes a Kardan masch ine 15 instead of a wheel 5.
- 11 b shows the powertrain test stand 28 in a configuration with two output units 1, 1 'according to the invention. In this case, the output units 1, 1 'each simulate a driven wheel. The output units 1 are connected via the wheel output shafts 31', 31 "to the motor vehicle drive train 29 to be tested.
- Fig. 11c showed the powertrain test stand 28 in a further configuration.
- the powertrain test stand 28 comprises the drive unit 30 as well as four output units 1, 1 ', 1 ", 1"' according to the invention.
- An automotive powertrain 29 to be tested includes the transmission 34, the differential gear 29 ', the axle output shaft 31 and the wheel output shafts 31', 31 ", 31" ', 31 "”.
- the output units 1, 1 ', 1 ", 1"' each simulate a driven wheel. From the differential gear 29 ', the distributed and converted torque via the Radabtriebswellen 31 "' and 31" 'to the output units 1 "and 1"' passed. Likewise, the distributed and converted torque is transmitted to the output units 1 and 1 'via the wheel drive shafts 31' and 31 ".
- Fig. 11d shows the powertrain test stand 28 in yet another configuration.
- the motor vehicle drive train 29 to be tested is driven by the drive unit 30.
- the transmission 34 converts the torque and distributes it to the output units 1 and 1 'via the wheel output shafts 31' and 31.
- the drive train test stands 28 of FIG. 11 have a so-called elastic construction, which corresponds in the original to a suspension of the motor vehicle drive train 29 to be tested in the motor vehicle.
- Such an embodiment of the drive train test bench 28 according to the invention enables a realistic analysis of the vibration behavior and in particular of the acoustic behavior, eg in the case of a switching operation.
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102016202332.2A DE102016202332A1 (en) | 2016-02-16 | 2016-02-16 | Subassembly for one output unit, output unit, powertrain test bench and modular system |
PCT/EP2017/050748 WO2017140443A1 (en) | 2016-02-16 | 2017-01-16 | Sub-assembly for an output unit, output unit, drive train test stand and modular system |
Publications (1)
Publication Number | Publication Date |
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EP3475677A1 true EP3475677A1 (en) | 2019-05-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17700940.4A Ceased EP3475677A1 (en) | 2016-02-16 | 2017-01-16 | Sub-assembly for an output unit, output unit, drive train test stand and modular system |
Country Status (3)
Country | Link |
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EP (1) | EP3475677A1 (en) |
DE (1) | DE102016202332A1 (en) |
WO (1) | WO2017140443A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020125840A1 (en) * | 2020-10-02 | 2022-04-07 | PID test & engineering GmbH | Test bench for an engine |
EP4246114A1 (en) * | 2022-03-17 | 2023-09-20 | H. Kleinknecht & Co. GmbH | Test stand for a test item having a rotatable shaft |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4932628A (en) * | 1988-03-03 | 1990-06-12 | Pacheco Orlando D | Portable engine test stand |
DE4328537C2 (en) | 1993-08-25 | 2000-03-30 | Univ Stuttgart | Transmission test bench and method for testing a transmission |
DE10037412C2 (en) * | 2000-08-01 | 2002-08-01 | Teamtechnik Maschinen Und Anla | Drive and transmission test bench |
DE10234022A1 (en) * | 2002-07-26 | 2004-02-05 | EGM Entwicklungsgesellschaft für Montagetechnik GmbH | Test bed for gear or drive systems has a common base body and additional function modules with at least clamping and drive modules, thus ensuring test bed rigidity and flexible configuration |
DE10344802A1 (en) * | 2003-09-26 | 2005-04-14 | Ford Global Technologies, LLC, Dearborn | Gearbox acoustic testing device, e.g. for repair or assembly line use, has a robot testing arrangement with a flange that is connected to gearbox so that continuous testing can be carried out with an open transmission |
DE102004025828B3 (en) * | 2004-05-24 | 2006-01-05 | Renk Ag | Vehicle test stand has outer rotor fixed to road roller walls on one side only and hollow cooled stator attached to force sensor |
DE102008006634A1 (en) * | 2008-01-29 | 2009-07-30 | Volkswagen Ag | Test bench for e.g. transverse transmission, of vehicle, has drive device coupled with transmission, and module component provided with standard elements that are adapted individually to transmission |
AT11836U3 (en) * | 2011-01-13 | 2012-02-15 | Avl List Gmbh | PALLET SYSTEM WITH A RANGE OF PANELS AND AN ADVANCE PACKAGE |
AT510101B1 (en) | 2011-09-21 | 2014-01-15 | Avl List Gmbh | Method for the computer-based generation of a driving cycle data record and a longitudinal profile data record and method for testing a motor vehicle |
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2016
- 2016-02-16 DE DE102016202332.2A patent/DE102016202332A1/en not_active Ceased
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2017
- 2017-01-16 WO PCT/EP2017/050748 patent/WO2017140443A1/en unknown
- 2017-01-16 EP EP17700940.4A patent/EP3475677A1/en not_active Ceased
Also Published As
Publication number | Publication date |
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DE102016202332A1 (en) | 2017-08-17 |
WO2017140443A1 (en) | 2017-08-24 |
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