Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
  • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
  • B62D1/16—Steering columns
  • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
  • B62D1/181—Steering columns yieldable or adjustable, e.g. tiltable with power actuated adjustment, e.g. with position memory
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
  • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
  • B62D1/16—Steering columns
  • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
  • B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible

Definitions

• the invention relates to a steering column assembly for a Kraf vehicle with an external • cladding tube, a telescoping cash inner casing tube and a telescopic drive comprising a spindle nut, a telescopic spindle which is fixed via a crash element at the inner jacket tube and a telescoping motor with a gear reducer, ,
• a steering column arrangement for a motor vehicle with an outer, fixedly arranged jacket tube and with an telescopic inner jacket tube displaceable in the outer jacket tube and with an adjusting device effective between the two jacket tubes for displacing the inner jacket tube is known from DE 198 12 179 Cl.
• the steering column arrangement has an elongated actuator acting on the inner casing tube and aligned axially parallel to the longitudinal axis, with energy absorbing means being associated with the actuator.
• the object of the invention is to design and arrange a steering column arrangement in such a way that the amount of crash energy that can be absorbed increases, the steering column arrangement is acoustically decoupled from the body and the installation space is compressed.
• the object is achieved in that the crash element is at least partially hollow and accommodates the spindle nut.
• the telescopic spindle moves into the crash element when it is turned, and thus the installation space is compressed behind the spindle nut in the direction of movement of the spindle.
• the crash element is formed by a sleeve and a pin positioned coaxially to the sleeve, which is at least partially inserted into the sleeve on one end face of the sleeve and fastened to the sleeve.
• This structure enables the spindle nut to be introduced and has the property that the crash element moves into one another in the event of a collision of the motor vehicle and absorbs part of the crash energy which acts on the steering column arrangement or converts it into heat and deformation energy.
• the crash element which practically extends the telescopic spindle, is formed from a simple material compared to the spindle.
• the manufacture of the telescopic spindle does not require any heat or other treatment necessary for spindles.
• an additional possibility is that the telescopic spindle has a flexible drive shaft is connected to an output shaft of the reduction gear, the telescopic spindle being rotatably mounted with a side opposite the spindle nut in a bearing block that is structurally separate from the reduction gear.
• the solution of a simple drive of the telescopic spindle described at the outset enables mechanical and thus acoustic decoupling of the steering column arrangement.
• the largest part of the noise when adjusting the steering column arrangement is transmitted by structure-borne noise.
• the arrangement can be acoustically decoupled by introducing a flexible drive shaft as an intermediate shaft between the telescopic spindle and the output shaft of the reduction gear.
• the main part of the structure-borne noise is formed by the drive unit, consisting of a motor and a reduction gear.
• Polymer plastic or rubber is used for acoustic decoupling.
• the use of plastic requires mechanical decoupling because the operational stress for plastic bearings and shafts is too great.
• the problem of mechanical decoupling is solved by the bearing block, which is attached to the body of the motor vehicle or to the outer casing tube.
• the tensile and compressive forces which arise when telescoping the steering spindle in the direction of a longitudinal axis of the telescopic spindle are conducted directly from the telescopic spindle via the bearing block into a part of the body.
• the tensile and compressive forces are mechanically decoupled from the drive of the telescopic spindle, i.e. from the reduction gear and the drive unit.
• a bearing of the drive unit to be dimensioned according to the tensile and compressive load is not necessary. The fact that the drive unit only has to take up a torque for rotating the telescopic spindle makes the drive unit much quieter.
• the outer casing tube can be pivoted about a y-axis by a pivot drive, which has a spindle nut, a spindle and a flexible drive shaft, the spindle via the flexible drive shaft with an output shaft of a reduction gear is connected and the spindle is rotatably mounted with a side opposite the spindle nut in a bearing block that is structurally separate from the reduction gear.
• a second motor, which drives the reduction gear, is provided as the swivel motor.
• the solution used with regard to the telescopic spindle offers the additional advantage for the pivoting of the outer casing tube that the flexible drive shaft can also be bent or curved for transmitting a torque. By fixing the drive unit to the body, the spindle is also pivoted.
• the longitudinal axis of the spindle and the axis of rotation of the output shaft of the reduction gear which is connected directly to the flexible drive shaft, enclose an angle between 135 ° and 180 °.
• the drive shaft is designed to be correspondingly flexible for transmitting a torque.
• the flexible drive shafts within the steering column arrangement differ in terms of their length and in terms of their torsional properties because the torques to be transmitted for telescoping or pivoting are of different sizes.
• the tensile and compressive forces which arise when the outer casing tube is swiveled in the direction of a longitudinal axis of the spindle are passed directly from the spindle via the bearing block into a part of the body. be directed.
• the telescopic motor and the reduction gear are partially mechanically decoupled from the telescopic spindle and are only loaded by a torque.
• the spindle nut which is in engagement with the telescopic spindle or with the spindle and the flexible drive shaft connected with the telescopic spindle or the spindle are at least partially formed from plastic.
• the flexible drive shaft formed as an intermediate shaft for the pure transmission of a torque is at least partially formed from plastic or from another material which is advantageous with regard to acoustic decoupling.
• a very good solution can be found in the area of components that are made of several different materials.
• the plastic increases the flexibility of the drive shaft and, above all, reduces the transmission of vibrations and thus noise. This also has an advantageous effect in the case of a spindle nut made of plastic, which also has better properties of self-lubrication.
• the flexible drive shaft is mounted on the output side with the telescopic spindle or with the spindle in the bearing block and on the drive side connected to the output shaft in the reduction gear.
• the rest of the flexible drive shaft is exposed to allow trouble-free bending.
• the bearings of the flexible drive shaft within the reduction gear and within the bearing block are lubricated and sealed against the rest of the drive shaft.
• the bearings of the flexible drive Shafts are made of metal and attached to the plastic areas as a conventional shaft end.
• the reduction gear and / or the motor are supported by a bearing on the body of the motor vehicle, which is at least partially made of plastic. Not only the flexible drive shaft, but also the mounting of the drive unit thus contributes to acoustic decoupling from the body.
• Figure 1 is a perspective view of a steering column assembly.
• Fig. 2 is a sectional view of a crash element.
• a steering column assembly 1 is shown in perspective.
• a steering wheel (not shown) connects to the head 1.1.
• a steering mechanism (not shown) connects to the right side.
• An inner jacket tube 2.1 transmits the rotational movement from the steering wheel to an outer jacket tube 2, which connects to the steering mechanism with a claw 3.
• the inner jacket tube 2.1 can be telescoped or moved into the outer jacket tube 2.
• a crash element 4 is attached to the inner casing tube 2.1.
• the crash element 4 has a sleeve 4.1 and a pin 4.2.
• the pin 4.2 is inserted into the sleeve 4.1 and connected to it by a clamp connection.
• the crash element 4 is fastened to the inner casing tube 2.1 with the pin 4.2.
• a spindle nut 5.6 is introduced into the sleeve 4.1 on the opposite side of the crash element 4.
• One side of the telescopic spindle 5.1 engages in the spindle nut 5.6.
• the telescopic spindle 5.1 is rotatably mounted in a bearing block 5.5.
• the telescopic spindle 5.1 is primarily fixed in the direction of the longitudinal axis x by the bearing block 5.5.
• the bearing block 5.5 is attached to a bracket 8, which transmits the bearing forces to a part of the body.
• the telescopic spindle 5.1 is driven by a flexible drive shaft 5.4, with which the telescopic spindle 5.1 is operatively connected within the bearing block 5.5.
• the flexible drive shaft 5.4 transmits a drive torque from a drive unit.
• the drive unit is formed from a telescopic motor 5.2 and a reduction gear 5.3.
• An output shaft (not visible) with an axis of rotation a is arranged within the reduction gear 5.3.
• the Ab- drive shaft is directly connected to the flexible drive shaft 5.4.
• the drive unit, or the reduction gear 5.3 is mounted on the outer casing tube 2 via several bearings 5.7, 5.7 '. Due to the mechanical decoupling of the tensile and compressive forces from the drive unit, the flexible drive shaft 5.4 transmits only one torque. This creates the possibility of at least partially forming the flexible drive shaft 5.4 from plastic and thus also acoustically decoupling the drive unit. In order to reinforce the acoustic decoupling, the spindle nut 5.6 and the bearings 5.7, 5.7 'are also made of plastic.
• the outer jacket tube 2 is pivotally mounted about a y-axis via a claw 3.
• a lever kinematics 7 is attached to the outer casing tube 2, which has a spindle nut 6. 6 records.
• a spindle 6.1 engages in the spindle nut 6.6 and is rotatably mounted in the direction of the longitudinal axis x 'relative to the spindle nut 6.6 in a bearing block 6.5 perpendicular to the longitudinal axis x'.
• the bearing block 6.5 is in turn rotatably mounted on the console 8.
• the spindle 6.1 is driven by a flexible drive shaft 6.4, which in turn is driven by a non-visible output shaft of a reduction gear 6.3.
• the flexible drive shaft 6.4 is bent.
• the longitudinal axis x 'of the spindle 6.1 encloses an angle ⁇ of 135 with the axis of rotation a' of the output shaft.
• the drive unit consisting of swivel motor 6.2 and reduction gear 6.3 is mechanically decoupled by the tensile and compressive forces acting in the direction of the longitudinal axis x '.
• the flexible drive shaft 6.4 which is partly made of plastic, acts as an acoustic decoupling.
• the acoustic decoupling is reinforced by the fact that the bearings 6.7, 6.7 'of the drive unit and the spindle nut 6.6 are also made of plastic.
• the flexible drive shaft 5.4 Due to the articulation of the bearing block 5.5 for the telescopic spindle 5.1 on the bracket 8, the flexible drive shaft 5.4 is also bent when the outer casing tube 2 is pivoted.
• the use of a flexible drive shaft 5.4, 6.4 is made possible by the mechanical decoupling of the tensile and compressive forces.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Steering Controls (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

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• 2002
  • 2002-12-19 DE DE10259596A patent/DE10259596B3/de not_active Expired - Fee Related
• 2003
  • 2003-11-13 US US10/539,607 patent/US20060169524A1/en not_active Abandoned
  • 2003-11-13 WO PCT/EP2003/012684 patent/WO2004056637A1/de not_active Ceased
  • 2003-11-13 EP EP03767536A patent/EP1572520A1/de not_active Withdrawn
  • 2003-11-13 JP JP2004561162A patent/JP4202325B2/ja not_active Expired - Fee Related

Non-Patent Citations (1)

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