WO2006002790A1 - Direction a superposition - Google Patents

Direction a superposition Download PDF

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Publication number
WO2006002790A1
WO2006002790A1 PCT/EP2005/006611 EP2005006611W WO2006002790A1 WO 2006002790 A1 WO2006002790 A1 WO 2006002790A1 EP 2005006611 W EP2005006611 W EP 2005006611W WO 2006002790 A1 WO2006002790 A1 WO 2006002790A1
Authority
WO
WIPO (PCT)
Prior art keywords
steering
pinion shaft
gear
actuator
superposition
Prior art date
Application number
PCT/EP2005/006611
Other languages
German (de)
English (en)
Inventor
Bernd Heintel
Christian Mosler
Original Assignee
Daimlerchrysler 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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2006002790A1 publication Critical patent/WO2006002790A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/008—Changing the transfer ratio between the steering wheel and the steering gear by variable supply of energy, e.g. by using a superposition gear
    • 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
    • B62D1/166—Means changing the transfer ratio between steering wheel and steering gear

Definitions

  • the invention relates to a superposition steering system according to the preamble of claim 1.
  • a superposition steering with a superposition device is known.
  • the steering wheel angle generated by the steering operation of the steering wheel and an additional angle generated by an actuator are superimposed by the superposition means to an output angle. According to the output angle of the steering angle is set to the steerable vehicle wheels.
  • the basic idea of the invention is to connect the input and output of the actuator to one another via a gear, wherein the gearbox comprises a worm gear rotatably connected to the power motor and a crown gear arranged coaxially to the steering column, and the worm gear and the crown gear are drive-connected via a pinion shaft.
  • the gearbox comprises a worm gear rotatably connected to the power motor and a crown gear arranged coaxially to the steering column, and the worm gear and the crown gear are drive-connected via a pinion shaft.
  • An embodiment of the invention provides for rotatably supporting the pinion shaft in a pinion shaft carrier rotatably connected to the steering handle.
  • About the bearing of the steering handle introduced into the steering column and transmitted to the pinion shaft carrier and the pinion shaft as a lateral force steering angle is transmitted to the crown wheel. Since the worm wheel can not be driven by the pinion shaft due to the geometry of the teeth, rotation of the pinion shaft occurs only when the worm shaft is driven by the power motor. In this respect, when the power steering motor is inactive, the steering angle between input and output of the actuator is transmitted 1: 1. Only with an active auxiliary motor occurs an increase or decrease in the steering gear applied to the steering angle.
  • a further embodiment of the invention provides to design the pinion shaft carrier in two parts.
  • a multi-part design of the pinion shaft carrier offers advantages in terms of the realization of the bearing of the pinion shaft and the support of the bearing on the pinion shaft carrier. Particularly advantageous is a two-part, in particular half-execution.
  • the pinion shaft carrier halves may be formed symmetrically, whereby the superposition steering can be made very efficient due to high common parts number.
  • the pinion shaft has a spindle-shaped in the contact area with the worm wheel Outer contour on. In the area of this spindle-shaped outer contour, the pinion shaft is toothed with the worm wheel. Together with the gear pair pinion shaft / crown, it is possible to minimize an acting in the axial direction in the pinion shaft force and thus to use for the storage of the pinion shaft simple needle or ball bearings without complex storage settings.
  • Fig. 1 is a schematic diagram of a schematic diagram
  • FIG. 2 shows a cross section through an actuator of the superposition steering according to the invention
  • Fig. 3 is a view acc. Fig. 2 an alternative
  • a not-shown vehicle has a superposition steering 1 with hydraulic
  • Servo support 2 on.
  • steered vehicle wheels 3 via tie rods 4 connected to a rack 5 which coaxially merges into the piston rod 6 arranged as a servomotor double-acting piston-cylinder unit 7 and is connected to the piston rod 6.
  • the rack 5 meshes with a pinion 9, which is drivingly connected via a steering column 15 with a steering handle 19 in the form of a steering wheel.
  • a torsionally elastic element 20 is arranged so that between the pinion 9 and steering handle 19, a limited relative rotation may occur, the amount of which is dependent on the transmitted between pinion 9 and steering handle 19 forces and moments.
  • This relative rotation controls a servo valve 21, which is connected on the one hand via motor lines 22 to the two chambers 8a, 8b of the piston-cylinder unit 7 and on the other hand to the pressure side of a hydraulic pump, not shown.
  • the invention is not limited to a hydraulic power assistance 2. Rather, the assistant can also by a. electrically or electromagnetic auxiliary power device are applied. This can act on the rack 5, on a steering gear 10 or on the steering column 15.
  • an actuator 25 is arranged, whose structure in connection with the description of FIG. 2 and FIG. 3 is discussed in more detail.
  • the actuator 25 is connected on the input side via a first portion 16 of the steering column 15 with the steering wheel 19 and the output side via a further portion 17 of the steering column 15 with the steering gear 10.
  • the actuator 25 is connected to the output of a control unit 30.
  • the inputs of the control unit 30 are connected via signal lines 33 with sensors, not shown, the continuously, for example, driving dynamics characteristics such as driving and Determine yaw rate as well as lateral and longitudinal acceleration of the vehicle and steering wheel and wheel position angle.
  • driving dynamics characteristics such as driving and Determine yaw rate as well as lateral and longitudinal acceleration of the vehicle and steering wheel and wheel position angle.
  • the control unit 30 controls the actuator 25 or, better, an auxiliary motor of the actuator 25.
  • Fig. 1 an alternative arrangement of the actuator 25 between the torsionally elastic element 20 and the steering wheel 19 is shown by dashed lines.
  • a worm wheel 35 is arranged coaxially to the steering column 15 in a cylindrical housing 28.
  • the worm wheel 35 is non-rotatably connected to an auxiliary motor, not shown in the figures, for example, a hydraulic motor or an electric motor connected.
  • the auxiliary power motor is supported on a pinion shaft carrier 40 which is designed in several parts, in two parts, in FIG. 2 and FIG. 3, for manufacturing and assembly reasons.
  • the two pinion shaft carrier halves 41,42 are non-positively connected, for example via screw connections.
  • an axial guide for example, in sliding 50 or needle bearings by start-up discs or ball bearings 51 is provided.
  • the pinion shafts 45a, 45b, a pinion 49 which is connected via a corresponding toothing with a coaxial with the worm wheel 35 arranged crown wheel 55 is engaged.
  • the crown wheel 55 is rotatably connected to the actuator output 27.
  • the pinion shaft carrier 40 is shown in two parts in FIG. 2 and FIG. In principle, a one-piece or more than two-piece design is possible.
  • the pinion shaft carrier halves 41,42 are symmetrical. Mirror symmetry is in the case of the embodiment in Figure 2 with respect to a plane 37 which is perpendicular to the longitudinal axes 46a, 46b of the pinion shafts 45a, 45b and through the longitudinal axis 36 of the worm wheel 35. Axial symmetry exists with respect to the longitudinal axis 36 of the worm wheel 35th
  • the pinion shaft carrier halves 41,42 can be manufactured inexpensively.
  • the pinion shaft carrier halves 41,42 are non-positively connected to each other via clamping or screw connections lying outside the plane of the drawing.
  • Pinion shaft carrier 40 is rotated and the steering angle applied to the steering column 15 via the steering handle 19 steering angle, a further steering angle of the actuator 25 is superimposed. Since the auxiliary power motor is operable with opposite directions of rotation, the overlay angle can both increase and reduce the steering angle ultimately applied to the steering gear 10 in relation to the steering angle predetermined via the steering handle 19.

Landscapes

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

Abstract

La présente invention concerne une direction à superposition (1) conçue pour superposer un angle supplémentaire sur un mouvement de pivotement entre un organe de direction (19) et un mécanisme de direction (10). Une colonne de direction (15) peut ainsi relier l'organe de direction (19) au mécanisme de direction (10). Un actionneur (25) se trouve dans la colonne de direction. L'entrée (26) de cet actionneur est reliée à l'organe de direction (19) et sa sortie (27) est reliée au mécanisme de direction (10). L'actionneur (25) présente un moteur auxiliaire monté coaxial à la colonne de direction (15), ainsi qu'un engrenage autobloquant (35,45a,45b,55). Selon cette invention, l'engrenage (35,45a,45b,55) comprend une roue à vis sans fin (35) qui est reliée bloquée en rotation au moteur auxiliaire, ainsi qu'une roue hélicoïdale (55) qui est montée de manière coaxiale à la colonne de direction (15). La roue à vis sans fin (35) et la roue hélicoïdale (55) sont reliées en entraînement par un arbre de pignon (45a,45b).
PCT/EP2005/006611 2004-06-30 2005-06-18 Direction a superposition WO2006002790A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410031349 DE102004031349A1 (de) 2004-06-30 2004-06-30 Überlagerungslenkung
DE102004031349.0 2004-06-30

Publications (1)

Publication Number Publication Date
WO2006002790A1 true WO2006002790A1 (fr) 2006-01-12

Family

ID=34970788

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/006611 WO2006002790A1 (fr) 2004-06-30 2005-06-18 Direction a superposition

Country Status (2)

Country Link
DE (1) DE102004031349A1 (fr)
WO (1) WO2006002790A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014016009A (ja) * 2012-07-11 2014-01-30 Nissan Motor Co Ltd 食い違い軸歯車伝動機構
CN111032487A (zh) * 2017-08-30 2020-04-17 五十铃自动车株式会社 转向装置
CN111032484A (zh) * 2017-08-30 2020-04-17 五十铃自动车株式会社 转向装置
CN111032488A (zh) * 2017-08-30 2020-04-17 五十铃自动车株式会社 转向装置
US11897556B2 (en) * 2017-08-30 2024-02-13 Isuzu Motors Limited Steering device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014026709A1 (fr) * 2012-08-14 2014-02-20 Tedec Ag Entraînement à superposition
CH707435A1 (de) * 2013-01-09 2014-07-15 Thyssenkrupp Presta Ag Winkelüberlagerungseinrichtung für eine Fahrzeuglenkvorrichtung mit einem Planetengetriebe.
US9777797B2 (en) 2014-12-01 2017-10-03 Asmo Co., Ltd. Actuator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5171193A (en) * 1988-10-07 1992-12-15 A.T. Avanzata Tecnologia S.R.L. Reduction gear with high reduction ratio
US5387162A (en) * 1993-05-27 1995-02-07 Yang; Tai-Her Planetary worm type gear and application device
US5456640A (en) * 1994-02-09 1995-10-10 Petersen; Dean B. Automatic transmission with torque-dividing gearing
DE10220123A1 (de) 2001-05-23 2002-12-12 Continental Teves Ag & Co Ohg Überlagerungslenkung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5171193A (en) * 1988-10-07 1992-12-15 A.T. Avanzata Tecnologia S.R.L. Reduction gear with high reduction ratio
US5387162A (en) * 1993-05-27 1995-02-07 Yang; Tai-Her Planetary worm type gear and application device
US5456640A (en) * 1994-02-09 1995-10-10 Petersen; Dean B. Automatic transmission with torque-dividing gearing
DE10220123A1 (de) 2001-05-23 2002-12-12 Continental Teves Ag & Co Ohg Überlagerungslenkung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014016009A (ja) * 2012-07-11 2014-01-30 Nissan Motor Co Ltd 食い違い軸歯車伝動機構
CN111032487A (zh) * 2017-08-30 2020-04-17 五十铃自动车株式会社 转向装置
CN111032484A (zh) * 2017-08-30 2020-04-17 五十铃自动车株式会社 转向装置
CN111032488A (zh) * 2017-08-30 2020-04-17 五十铃自动车株式会社 转向装置
US11897556B2 (en) * 2017-08-30 2024-02-13 Isuzu Motors Limited Steering device

Also Published As

Publication number Publication date
DE102004031349A1 (de) 2006-01-26

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