Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D9/00—Steering deflectable wheels not otherwise provided for
• • 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
  • B60K17/00—Arrangement or mounting of transmissions in vehicles
  • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
  • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
• • 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
  • B60K17/00—Arrangement or mounting of transmissions in vehicles
  • B60K17/30—Arrangement or mounting of transmissions in vehicles the ultimate propulsive elements, e.g. ground wheels, being steerable
• • 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
  • B60K17/00—Arrangement or mounting of transmissions in vehicles
  • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
  • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
  • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion

Definitions

• the present invention relates to a device for increasing the steering ability of driven axles, in which a central torque transmits the torque via drive shafts to steered wheels.
• the present invention can be used in multi-axle vehicles that have individually suspended and attached wheels on steered axles, for example, traveling cranes
• the currently attainable maximum wheelbase on driven axles in two- and three-axle vehicles is approximately 38.5 °.
• the cardan shafts, which connect the central gearbox with the wheel axles, were designed with a maximum steering angle of 42 ° in the case of independent wheel suspensions, the steering movements with the deflection and rebound movements of the shock absorbers, so that a total of only a steering angle of approximately 37.5 ° at a deflection angle of 42 ° with maximum deflection and deflection are achievable.
• the aim should be to achieve the highest possible steering angle.
• the ability to steer should be significantly increased by enabling very large steering angles.
• the center gear of the respective driven axis is rotatably supported about a vertical axis.
• a rotation of the center gear around this axis can then improve the position of the elements of the drive relative to one another to the extent that very large resulting steering angles can be achieved. This more than compensates for the loss in the maximum steering angle caused by the compression and rebound of the struts.
• the center gear is enabled to take a twisted position that allows drive elements such as the propeller shafts (which are attached to the center gear and wheel drive with universal joints) to take positions that allow an optimally increased steering angle.
• the additionally created degree of freedom of the rotary movement of the central transmission therefore allows an optimization of the resulting steering angle, which can reach 45 °, for example, even when using conventional drive components. With that the Maneuverability of appropriately equipped vehicles is significantly increased.
• the center gear is mounted under the frame on a rotary bearing fixedly attached to the frame.
• the center gear can be mounted so that it can rotate at least by an angle of about 10 ° in both directions about the vertical axis.
• the center gear is connected to the steering in such a way that it can rotate proportionally according to the axle steering in the opposite direction to the wheel lock, or can be deflected in this way.
• This deflection opposite to the wheel lock creates the necessary freedom of arrangement for the drive cardan shafts in order to generate the resulting high steering angle.
• connect the central transmission to and disconnectable from the steering in order to be able to use the steering mechanism according to the invention in a controlled manner.
• the deflection of the center gear can be switched off when driving straight ahead and switched on off-road or when cornering tightly.
• the central transmission can be deflected via a coupling rod articulated on the steering lever of a wheel and a deflection lever articulated thereon.
• the steering lever connected to the coupling rod can be the steering lever of an axle to which the steering movement is transmitted from the opposite wheel steering lever via a track clip.
• Figure 1 is a view of a driven axis with an inventive
• Figure 3 eme view according to Figure 2 when cornering with a fixed
• FIG. 4 shows a view of an axis designed according to the invention according to FIG.
• FIG. 1 shows a view of a steered driven axle between the two wheels 4 of a vehicle, here a mobile crane.
• the two suspension struts 7 are attached to the frame 18 and fix the wheels 4, which thus have an individual suspension and have a wheel drive 3 with planetary gears.
• the wheels are steered over the downwardly projecting parts of the Federbeme 7, namely via a steering mechanism, of which m a steering lever 10 and a tie rod 14 to m Figure 1 are seen.
• the function of the steering will be described in detail with reference to Figure 6.
• the two wheels 4 are driven via the cardan shafts 2, which are provided on both sides with universal joints.
• the drive torque comes from the central gear 1, which is supplied in a conventional manner with the torque of the engine.
• the center gear 1 is fixed to the frame 18 via the attachment 5, which has the rotary connection 6 at its lower end.
• This rotary connection 6 thus rotatably couples the center gear to the mounting 5, in such a way that it can be deflected about the vertical axis 20 in both directions of rotation.
• the central transmission 1 can be rotated about the axis 20 according to the invention in the event of a steering lock by the deflection lever 9, in order to achieve the desired high steering locks.
• FIG. 6 will provide more detailed information about the steering kinematics used.
• FIGS. 2 to 5 are top views of an axle with two individually suspended, driven wheels.
• the steering movement is transmitted via a steering rod 13 on an arm of the steering lever 10 of the lower wheel 4, as can be seen most clearly in FIGS. 3 to 5.
• the tie rod 14 engages, which the steering force on the steering lever of the upper Transmits the wheel and steers it.
• the central transmission 1 is coupled to the steering.
• the coupling is shown in detail for an embodiment of the invention in FIG. 6 and will be explained in detail later.
• the basic principle of the invention can be explained in an understandable manner in the following on the basis of FIGS. 2 to 5, without going too much into the details.
• FIG. 2 shows a state which shows the axle without being influenced by a particular driving state and which could be called the "original state".
• the connecting line of the two projected wheel steering axles is referred to as the axle line
• the vertical axis 20 of the central transmission which appears point-like in this view, lies 1 in this "original state” on the axle line
• the steering rod 13 the steering lever 10
• the tie rod 14 and the cardan shafts 2 are arranged with the central gear 1 not rotated so that the wheels 4 are not steered. This is the state of this axis when driving straight ahead.
• FIG. 3 An axis with a wheel lock for a right turn is shown in FIG. 3. This right-hand curve is also still driven without the maximum possible steering lock supported by rotation of the center gear 1, and it becomes clear that with such a conventional "steering lock" only a steering angle of 38 ° can be achieved.
• the steering angle here is the angle between the axis of rotation of the steered wheel and the line connecting the two points around which the wheel steering rotation takes place, which are always on the respective longitudinal axis of the struts.
• FIG. 4 shows a state in which the vertical axis 20 of the center gear 1 lies on the line which in this projection is the longitudinal axes of the Suspension struts 7, i.e. the wheel steering axles connects.
• the state of a full turn on a right-hand bend is also shown here, but a resulting steering angle of 45 ° is achieved here.
• FIG. 6 shows two states, namely the deflected state in solid lines and the state for driving straight ahead in broken lines in order to make the changes in position of the components visible.
• the force is transmitted via the steering rod 13 to the lower steering lever 10 on its left arm.
• the steering cylinder is also on this left arm of the steering lever 10
• the steering lever 10 also has an articulated attachment point for the coupling rod

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
• Vehicle Body Suspensions (AREA)
• Arrangement And Driving Of Transmission Devices (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7916161

Family Applications (1)

Country Status (7)

Families Citing this family (5)

Citations (2)

Family Cites Families (10)

• 1999
  • 1999-07-27 DE DE19935160A patent/DE19935160A1/de not_active Ceased
• 2000
  • 2000-06-28 KR KR1020027001185A patent/KR20020019585A/ko not_active Application Discontinuation
  • 2000-06-28 CA CA002380247A patent/CA2380247A1/en not_active Abandoned
  • 2000-06-28 JP JP2001512392A patent/JP2003505290A/ja active Pending
  • 2000-06-28 CN CN00812625A patent/CN1373717A/zh active Pending
  • 2000-06-28 EP EP00952974A patent/EP1200282A1/de not_active Withdrawn
  • 2000-06-28 WO PCT/EP2000/006033 patent/WO2001007279A1/de not_active Application Discontinuation

Patent Citations (2)

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