• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a device according to the invention for testing an axle assembly of a motor vehicle, in particular a rear axle, the test loads are introduced via a "replacement module." The replacement module replaces the introduction of force by an axle gear and engages the attachment points of the axle gear on the axle assembly mounted plate (40) which is moved by a hydraulic cylinder (20).
    公开号:AT511568A2
    申请号:T50091/2012
    申请日:2012-03-21
    公开日:2012-12-15
    发明作者:
    申请人:Bayerische Motoren Werke Ag；
    IPC主号:
    专利说明:

    1 Printed: 22Ό3-2012 E014 10 2012/50091 15934
    The invention relates to a device for testing an axle assembly of a motor vehicle according to the preamble of claim 1.
    Such known devices act on a fixed to a test bench axle assembly with forces and moments to check the durability of the axle assembly. The applied forces and moments result from measurements or simulations of the real ferry operation of the motor vehicle. Thus, the durability of the axle assembly in the laboratory, at least partially bypassing driving tests, be tested in a so-called operating loads post-trial. For this purpose, the axle assembly (analogous to the attachment in the motor vehicle) is fixed to the test stand. Radaufstandskräfte are initiated at the wheel. In addition, for example, in a Hinterachsbaugruppe via a drive shaft and a Hinterachsgetriebe a support torque from the drive forces applied to the Hinterachsbaugruppe.
    A disadvantage of the known device is that the axle drive affects the accuracy of the test. In particular occurs when reversing the direction due to the backlash in the transaxle a jump function (hysteresis), which can only be compensated insufficiently by the control electronics of the test bench control.
    The object of the invention is to further develop the known device.
    This object is achieved by a device having the features of claim 1. The core idea of the invention is here, instead of a transaxle, via which a force is introduced by means of a drive shaft, a "replacement module". use. The replacement module has a tiltable plate which can be tilted by a motor unit, wherein the attachment points on the axle assembly, which receive the axle, are connected by means of connecting elements with the tiltably mounted plate so that when an initiation of tilting moments on the plate the Load collective from the simulated ferry operation is traced as well, as is the case with a device by introducing the forces and moments on the axle drive. 1/6 21-03-2012 2 Printed: 22-03-2012 E014 10 2012/50091
    By the invention, the axle assembly is loaded reproducibly without the interposition of a transaxle and without the use of a drive shaft. By standardizing the test setup in the sense of a uniform replacement module, the possibilities of error are reduced. In addition, there is a cost and time savings.
    Of course, the invention not driven by a drive shaft axle drive as such can still be arranged on the axle assembly to be tested. This is particularly advantageous when the housing of the transaxle of the stiffening of the axle assembly is used and thus omitting the transaxle would distort the test.
    Furthermore, it is possible to test axle assemblies with at least one electric motor. The electric motor can be designed here as an independent unit or in unit with a transmission. Due to the introduction of force according to the invention, bypassing the axle drive (and thus bypassing the electric motor), there are no test-technical restrictions which would result in the conventional test method by a power flow, but due to the non-rotating wheel shots stationary electric motor.
    In a preferred embodiment of the invention, the replacement module to a motor unit which generates linear movements, said unearth movements by coupling elements, which can transmit mainly tensile forces, generate tilting movements on the corresponding tiltably mounted plate. The coupling elements are designed for example as leaf springs. Thus, by introducing alternating rectilinear motions with different amplitudes, a broad spectrum of overturning torques can be applied to the axle assembly in a reproducible manner, without falsification by an axle transmission which generates a step function when reversing the direction of rotation, which is compensated only with great difficulty and inadequately by control electronics can. The coupling elements, on the other hand, transmit the moments without play, so that the prerequisite for exact descendancy of the operating loads to be simulated is created
    Preferably, the motor unit is designed as a hydraulic cylinder. Such hydraulic cylinders offer a variety of options for control.
    In a preferred embodiment of the invention, the tiltably mounted plate is oriented approximately horizontally, corresponding to the approximately horizontal orientation of the axle assembly of the motor vehicle to be tested.
    The connecting elements between the tiltable plate and the fastening points on the axle assembly are preferably designed as flexurally soft pull / push rods in order to avoid tension. In an advantageous manner, a force measuring element can be integrated in at least one of the connecting elements in order to be able to detect the forces actually applied to the axle assembly.
    Under axle assembly is understood in the context of the present invention, an assembly of at least two axle components, in particular a complete front or rear axle. Possible embodiments of the invention are illustrated in the drawing and are explained in more detail below. It shows:
    1 is a perspective view of a first device according to the invention,
    Fig. 2 is a representation corresponding to FIG. 1 of a second embodiment of the device according to the invention and
    3 is a side view of the device of FIG. 2.
    FIGS. 1 to 3 show a device according to the invention, designated in its entirety by 2, for testing an axle assembly of a motor vehicle, without showing the axle assembly. The axle assembly is fixed at its vehicle-side connection points (spring, damper, strut, axle, etc.) to the device in a manner not shown.
    The device 2 has a frame 4. The frame 4 is composed of a bottom plate 6, two side walls 8 with window-like openings 10 and a rear wall 12 together. The frame 4 takes a "replacement module". has, inter alia, a motor unit 20, coupling elements 30, 32 and 34, a tiltably mounted plate 40, holding elements 50 and 52, triangular side parts 70 and connecting elements 60, 62 and 64.
    The hydraulic cylinder 20 acts with its piston rod 22 on the lower coupling element 30, which is designed as a flexurally soft strut and thus can transmit tensile and compressive forces. The piston rod 22 has a connection head 26, with which the coupling element 30 is screwed. The piston rod 22 facing away from the end of the coupling element 30 is connected to the two symmetrically arranged side parts 70. At the lower end portion of the side parts 70, the vertically extending coupling elements 32 and 34 engage. The coupling elements 32 and 34 are designed as leaf springs. The upper end portions of the coupling elements 32 and 34 are connected to the tiltably mounted plate 40. According to FIG. 2, an additional table 90 is provided for stationary support of the axle assembly to be tested. The support is via non-illustrated, approximately vertically extending flexible rods that absorb the weight of the axle assembly and the replacement module. By using flexible rods, the axle assembly can be tested tension-free.
    In Fig. 1 support sleeves 80 are shown, via which the weight of the tiltable table 20 and the weight of all other existing between the piston rod 22 and table 20 components on the side walls 8 of the frame 4 is supported. Before putting the device 2 into operation, the support sleeves 80 are removed. The weight force is then supported on a stationary component of the device 2 (for example on the table 90) via the axle assembly to be tested and the approximately vertically extending flexible rods arranged thereon, as described above.
    Each approximately horizontally extending holding elements 50 and 52 connect the replacement module to the rear wall 12 of the frame 4 of the device 2. Decisive for the bondage of the plate 40 is here the lower holding element 50. The upper holding element 52 serves for an additional fixation of the plate 40, but in principle can be omitted. 4/6 21-03-2012 5 Printed: 22-03-2012 E014 10 2012/50091
    In linear movements of the piston rod 22 corresponding to the double arrow 24 32 and 34 tilting moments are introduced into the plate 40 via the coupling elements. In this case, the plate 40 tilts around the frame-side screw-on point 25 of the holding element 50 (see FIG. 3). The forces introduced by the hydraulic cylinder 20 with a lever arm x (see FIG. 3) bring about a corresponding moment on the axle assembly.
    Due to the design of the coupling elements 32 and 34 as leaf springs they are able to transmit tensile and compressive forces and compensate for movements transverse to the direction of force introduction.
    The connecting elements 62, 64 and 66 shown in Fig. 1 at the top of the tiltable plate 40 connect the plate 40 with an axle assembly, not shown. The connecting elements 62 to 66 in this case act on those fastening points of the axle assembly on which an axle drive is arranged on the real motor vehicle. Conventional rear-axle transmissions are usually attached to three connection points of the axle assembly. Accordingly, two connecting elements 62 to 66 are provided on the device 2 according to the invention. Thus, the initiation of the tilting moments takes place in exactly the same manner in which the axle drive is supported on the motor vehicle.
    The device 2 is preferably used for carrying out operating load-Nachfahrversuchen to complete axle assemblies. In particular, the device 2 serves, for example, to test a rear axle assembly. The rear axle subassembly has the replacement module according to the invention instead of a rear axle drive which is acted upon by a drive shaft. The replacement module converts a rectilinear force applied by the hydraulic cylinder 20 into a tilting moment on the plate 40. This waiver of Hinterachsgetriebe and drive shaft (both "original components" from the motor vehicle to be tested) yet achieved a stress on the individual components of the axle assembly, as occurs in the ferry operation of the motor vehicle.
    In addition to the torque introduction via the replacement module described above, as part of the operating load Nachfahrversuchs also force on the wheel hub of the axle assembly, not shown, preferably in all three 5/6 21-03-2012 6 Printed: 22-03-2012 E014 10 2012 / 50091
    Spaces (x, y, z), This braking and acceleration forces (x), lateral forces from cornering (y) and vertical forces from road bumps (z) are simulated. The applied load collective is, for example, measured loads when driving on a "poor road". or a "race track" derived.
    In summary, the invention can be described as follows: In a device 2 according to the invention for testing an axle assembly of a motor vehicle, in particular a rear axle, the test loads are matched by a "replacement module". initiated. The replacement module replaces the introduction of force through an axle drive and engages the attachment points of the axle drive on the axle assembly. The replacement module has a tiltably mounted plate 40, which is moved by a hydraulic cylinder 20. 6/6 21-03-2012
    权利要求:
    Claims (6)
    [1]
    7 Printed: 22-03-2012 E015 10 2012/50091 Patent claims 1. A device for testing an axle assembly of a motor vehicle, wherein forces and / or moments that simulate the real ferry operation of the motor vehicle can be introduced into a axle drive installed on the axle assembly characterized in that the device (2) has a replacement module instead of an axle transmission, with a tiltably mounted plate (40) which is movable by a motor unit (20) and with connecting elements (62, 64, 66) for connecting the plate (40 ) with those fastening points on the axle assembly, which are used in the motor vehicle attachment of the axle drive.
    [2]
    2. Apparatus according to claim 1, characterized in that the motor unit (20) generates linear movements which cause via coupling elements (32, 34) tilting movements of the plate (40).
    [3]
    3. Device according to claim 1 or 2, characterized in that at least one coupling element (32, 34) is designed as a leaf spring.
    [4]
    4. Device according to one of the preceding claims, characterized in that the motor unit is a hydraulic cylinder (20).
    [5]
    5. Device according to one of the preceding claims, characterized in that the plate (40) is aligned approximately horizontally.
    [6]
    6. Device according to one of the preceding claims, characterized in that at least one connecting element (62, 64, 66), a force measuring element is arranged, 2012 03 21 1/1 21-03-2012
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    AT41521T|1984-12-24|1989-04-15|Schenck Ag Carl|METHOD FOR TRANSMITTING FORCES AND / OR MOMENTS AND DEVICE THEREFOR.|
    DE3515010C2|1985-04-25|1987-02-19|Bayerische Motoren Werke Ag, 8000 Muenchen, De|
    DE3642717C2|1986-12-13|1989-07-20|Glyco-Antriebstechnik Gmbh, 6200 Wiesbaden, De|
    DE3926281C2|1989-08-09|1995-10-12|Daimler Benz Ag|Noise test bench for car transmissions|
    DE102006047268A1|2006-10-04|2008-04-10|Oswald Elektromotoren Gmbh|Loading device for a test stand|
    US20080275682A1|2007-05-04|2008-11-06|Langer William J|Method and system for axle evaluation and tuning with loading system and vehicle model|
    DE102008006634A1|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|
    CN202083562U|2011-03-21|2011-12-21|中国长安汽车集团股份有限公司四川建安车桥分公司|Running test device for rear axle assembly of automobile|CN104155123A|2014-08-22|2014-11-19|苏州昌飞自动化设备厂|Rectangular frame of axle spring composite testing apparatus|
    CN107024360A|2016-02-01|2017-08-08|宁波考比锐特汽车科技有限公司|A kind of all hydraulic pressure steering-gear performance test stand|
    CN106525464B|2016-12-30|2019-12-10|宁波建新底盘系统有限公司|Automobile torsion beam type rear axle fatigue test device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011076856.4A|DE102011076856B4|2011-06-01|2011-06-01|Device for testing an axle assembly of a motor vehicle|
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