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WO2017008990A1 - Mécanisme de direction et procédé de montage d'un tel mécanisme de direction - Google Patents

Mécanisme de direction et procédé de montage d'un tel mécanisme de direction Download PDF

Info

Publication number
WO2017008990A1
WO2017008990A1 PCT/EP2016/063892 EP2016063892W WO2017008990A1 WO 2017008990 A1 WO2017008990 A1 WO 2017008990A1 EP 2016063892 W EP2016063892 W EP 2016063892W WO 2017008990 A1 WO2017008990 A1 WO 2017008990A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
rack
steering gear
pressure piece
steering
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
Application number
PCT/EP2016/063892
Other languages
German (de)
English (en)
Inventor
Markus SORG
Helmut Bareis
Andrea Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch Automotive Steering GmbH
Original Assignee
Robert Bosch Automotive Steering GmbH
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 Robert Bosch Automotive Steering GmbH filed Critical Robert Bosch Automotive Steering GmbH
Publication of WO2017008990A1 publication Critical patent/WO2017008990A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/26—Racks
    • F16H55/28—Special devices for taking up backlash
    • F16H55/283—Special devices for taking up backlash using pressure yokes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • B62D3/12—Steering gears mechanical of rack-and-pinion type
    • B62D3/123—Steering gears mechanical of rack-and-pinion type characterised by pressure yokes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions

Definitions

  • pressure piece unit is known from DE 10 2010 029 603 A1.
  • This comprises a base part, which is provided for fixing in a receptacle of a housing of a steering gear, and a pressure piece which is to act on a rack of the steering gear, wherein between these components a prestressed compression spring is supported.
  • the Restoring force of the compression spring thus causes the elastic loading of the rack by the pressure piece and thus the steering pinion through the rack.
  • this is inserted into a receiving opening of the housing of the steering gear, secured by the attachment of a serving as a stop for the base ring snap ring and closed after release of the activation pin, the receiving opening by means of a lid.
  • An inventive method for mounting such a steering gear provides that the rack, the steering pinion and the pressure piece unit are arranged within at least one of the housing parts, then the housing by a connection (preferably by gluing and / or welding) of the housing parts is closed and then the pressure piece unit is released by releasing the activation element.
  • a particular advantage of the steering gear according to the invention and the method according to the invention is that the pressure piece unit - unlike the "bearing yoke" in the steering gear according to DE 2 336 572 C2 - does not have to be compressed during assembly and in particular during connection of the housing parts by applying pressure, Compared to an assembly of the pressure piece unit disclosed in DE 10 2010 029 603 A1, a simplified assembly results, since the pressure piece unit in the steering gear according to the invention only has to be inserted in one of the housing parts and a separate fixation by a snap ring In addition, in the case of the steering gear according to the invention, there is no need to provide an outwardly open receiving opening corresponding to the dimensions of the pressure piece unit, which can have a positive effect on the structural strength of the housing.
  • a need for a separate fixation of the pressure piece unit is not given in particular if this is on all sides, i. both in the two directions defined by the axis of action as well as in all radially aligned directions, is held fixed by the housing and the rack.
  • the axis of action represents the axis in which the pressure of the pressure unit acts on the rack.
  • the housing has a cup-shaped housing portion for receiving the pressure piece unit, wherein the longitudinal axis of the rack extends transversely (and in particular perpendicular) to the longitudinal axis of the cup-shaped housing portion.
  • a "cup-shaped” is understood to mean a housing section which has a shell part extending in the direction of the longitudinal axis of this housing section with an annular, preferably annular cross-sectional area, wherein one longitudinal axial end of the shell part is at least partially closed by means of a bottom part, while the other longitudinal axial end is preferred Completely is designed unlocked.
  • Such an embodiment of a steering gear according to the invention allows a simple insertion of the pressure piece unit in the context of assembly, which is already secured in position in all directions after a subsequent insertion of the rack in the corresponding housing part. Additional measures to secure the position of the pressure piece unit are therefore not required.
  • the longitudinal axis of the pot-shaped housing section is also aligned transversely (and in particular perpendicularly) to the longitudinal axis or rotational axis of the steering pinion, which can also be aligned transversely (and in particular perpendicularly) to the longitudinal axis of the rack.
  • a steering gear according to the invention may also be provided that the housing forms a through hole for removal of the activation element.
  • the passage opening may be relatively small, in particular smaller than the (smallest or largest) dimension of the pressure piece unit (in a direction radial to a longitudinal axis of the passage opening).
  • the housing with a pot-shaped housing portion may be particularly preferably provided that the passage opening is arranged in the bottom part of the cup-shaped housing portion.
  • the rack and / or the steering pinion (each) is mounted in at least one bearing element / are, which in turn is mounted in a receptacle of the housing.
  • the bearing element may be a sliding bearing element and / or a rotary bearing element or else a sealing element, whereby combined embodiments thereof are also possible.
  • the housing is at least partially and preferably completely formed of plastic, while it may be provided that the one or more bearing elements, in particular in embodiments as sliding and or rotary bearing elements, at least partially made of metal (s) are formed.
  • one with the bearing element cooperating clearance compensation element is provided.
  • This may be, for example, a separate element or a component of the bearing element of a highly elastic material, such as an elastomer, which is integrated during assembly under bias in the steering system, wherein the elastic return effect causes the clearance compensation.
  • Fig. 1 an inventive steering gear in a perspective view
  • Fig. 3 the steering gear in an exploded view
  • Fig. 4 the pressure piece unit in an exploded view.
  • the steering gear illustrated in the drawings comprises a housing with two housing parts 1, 2, a rack 4 with a toothed section 3, a steering pinion 5 and a pressure piece unit 6.
  • the housing comprises a first tubular housing portion 7, which serves to receive the rack 4, and a second tubular housing portion 8, which serves to receive the steering pinion 5 and which transversely penetrates the first tubular housing portion 7 in the vicinity of one of its ends, wherein an angle between the longitudinal axes 9, 10 of the two tubular housing sections is approximately 90 °. While the two ends of the first tubular housing portion 7 are formed open, one of the ends of the second tubular housing portion 8 is formed closed.
  • the housing further comprises a cup-shaped housing portion 1 1, which serves to receive the pressure piece unit 6.
  • the cup-shaped housing portion 1 1 comprises a shell portion 12 and a bottom portion 13, with the exception of a relatively small central Through opening 14 is formed closed.
  • the open end of the cup-shaped housing portion 1 1 opens into that region of the first tubular housing portion 7, which is also penetrated by the second tubular housing portion 8.
  • the longitudinal axes 9, 10, 15 of the three housing sections can thereby intersect approximately or exactly at one point.
  • the two ends of the rack 4 protrude from the first tubular housing portion 7 and serve to connect to tie rods (not shown) of steered wheels of a motor vehicle.
  • One end of the steering pinion 5 protrudes from the open end of the second tubular housing portion 8 and serves to connect to a handlebar (not shown), which is connected to a steering wheel of the motor vehicle.
  • a rotation of the steering pinion 5 by means of the steering wheel and the handlebar is translated into a displacement of the rack 4 and thus the tie rods within the first tubular housing portion.
  • the rack 4 is pressed by means of the pressure piece unit 6 to the steering pinion 5, wherein the pressure piece unit 6 at the bottom part 13th of the cup-shaped housing portion 1 1 is supported.
  • the housing parts 1, 2 may be made of plastic and due to the advantageous shape without undercuts relatively easily by injection molding. In order nevertheless to ensure a secure (mobile) storage of the rack 4 and the steering pinion 5 during the service life, these are mounted in bearing elements, which in turn are mounted in the housing. Specifically, the rack 4 is mounted in the region of the end of the steering pinion 5 farther end in a sliding bearing member 16, while the steering pinion 5 is mounted on both sides of the rack 4 in each case a rotary bearing member 37, 38.
  • the first, arranged in the vicinity of the protruding end of the housing pivot bearing member 37 may be formed as a ball bearing and the second pivot member 38 as a needle bearing.
  • a sealing element 19 is arranged to prevent ingress of contaminants via the open end of this housing section 8.
  • Corresponding sealing elements can also be provided at one or both ends of the first tubular housing section 7.
  • the pressure piece unit 6 acts after its activation self-adjusting and self-adjusting.
  • the structural details of the pressure piece unit 6 are shown in Figs. 2 and 4.
  • a slider 18 eg in the form of an insert film
  • an adjusting device 20 is arranged on the side remote from the rack 4 side of the pressure piece 19.
  • the adjusting device 20 has an adjusting disk 23. Between the adjusting plate 23 and the pressure piece 19, a spring washer 24 is arranged. In the pressure piece 19 is a recess 25.
  • the adjusting disc 23 is located with a contact surface on a complementary contact surface of the base member 21 at. The contact surfaces are formed from two semicircular inclined surfaces 26, each with the same pitch orientation (compare Fig. 4).
  • a compensation of form and position tolerances and other tolerances of the components of the steering gear, which have an impact on the meshing engagement of rack 4 and steering pinion 5 is achieved by the adjusting device 20, which initially compensates for the tolerance margin and then in operation wear and setting ,
  • the pressure piece play adjusts itself by means of the spring washer 24 and a shoulder 27 in the adjusting disk 23.
  • the pressure piece unit 6 is provided as a prestressed mounting unit, wherein the pressure piece 19, the spring washer 24, the compression spring 22, the base part 21, the adjusting disc 23 and a lying between the adjusting disc 23 and the base member 21 torsion spring 28 under compressive bias of the compression spring 22 and Torsionsschreib the torsion spring 28 are held together by means of an activation pin 29.
  • the activation pin 29 lies in the region of an end portion with projections 30 on a shoulder 31 of the pressure piece 19 and in the region of a central portion with an annular shoulder 32 on the side of the base part 21 facing away from the pressure piece 19.
  • the torsion spring 28 is held biased between the adjusting disc 23 and the base part 21 in the preassembled position to torsion.
  • This preassembled position of the adjusting disc 23 and the base part 21 is held by means of a double salmon 33 of the activation pin 29 by the two-plane 33 prevents rotation of the adjusting disc 23 and the base member 21 to each other.
  • the two-flat 33 protrudes for this purpose in through-openings 34, 35 in the adjusting disks 23 and the base part 21, which passage openings 34, 35 have complementary opening cross-sections to the cross-section of the two-blade 33 (see FIG.
  • the pressure piece unit 6 is first inserted into the cup-shaped housing portion 1 1 of the first housing part 1 and then the rack 4 is inserted into the first housing part 1. Then also the steering pinion 5 is inserted into the formed by the first housing part 1 half-shell of the second tubular housing portion 8 and then the second housing part 2 is placed. By gluing or welding along the two housing parts 1, 2 formed, lying for the most part in a single plane connecting surfaces 36, the two housing parts 1, 2 are permanently connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne un mécanisme de direction comprenant une crémaillère (4) montée coulissante dans un axe longitudinal dans un carter, un pignon de direction (5) monté pivotant dans le carter et s'engrenant avec la crémaillère, (4) et une unité pièce de pression (6) montée à l'intérieur du carter et permettant d'appuyer la crémaillère (4) contre le pignon de direction (5), le carter formant une première partie carter (1) et une deuxième partie carter (2) qui forment ensemble des surfaces de liaison (36) orientées dans la direction longitudinale de la crémaillère (4) et destinées à une liaison mutuelle, caractérisé en ce que l'unité pièce de pression (6) est réalisée sous la forme d'une unité précontrainte apte à être desserrée par la désactivation d'un élément d'activation.
PCT/EP2016/063892 2015-07-13 2016-06-16 Mécanisme de direction et procédé de montage d'un tel mécanisme de direction Ceased WO2017008990A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015111258.2A DE102015111258A1 (de) 2015-07-13 2015-07-13 Lenkgetriebe und verfahren zur montage eines solchen lenkgetriebes
DE102015111258.2 2015-07-13

Publications (1)

Publication Number Publication Date
WO2017008990A1 true WO2017008990A1 (fr) 2017-01-19

Family

ID=56137327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/063892 Ceased WO2017008990A1 (fr) 2015-07-13 2016-06-16 Mécanisme de direction et procédé de montage d'un tel mécanisme de direction

Country Status (2)

Country Link
DE (1) DE102015111258A1 (fr)
WO (1) WO2017008990A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114055403A (zh) * 2021-10-29 2022-02-18 富鼎电子科技(嘉善)有限公司 拆装装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112550677B (zh) * 2020-12-11 2022-08-30 兰州飞行控制有限责任公司 一种扭转式人工感觉力的启动预载调整结构及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1564760A (en) * 1972-07-18 1980-04-16 Cam Gears Ltd Rack and pinion units
DE2336572C2 (de) 1972-07-18 1985-05-23 Cam Gears Ltd., Hitchin, Hertfordshire Zahnstangenlenkgetriebe
EP1086881A1 (fr) * 1999-09-24 2001-03-28 Renault Carter pour mécanisme de direction à pignon et crémaillère
WO2004076261A1 (fr) * 2003-02-26 2004-09-10 Schmitterchassis Gmbh Mecanisme de direction pour une servocommande electrique dans des vehicules
DE102010029603A1 (de) 2010-06-02 2011-12-08 Zf Lenksysteme Gmbh Vorrichtung zum Andrücken einer Zahnstange

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1564760A (en) * 1972-07-18 1980-04-16 Cam Gears Ltd Rack and pinion units
DE2336572C2 (de) 1972-07-18 1985-05-23 Cam Gears Ltd., Hitchin, Hertfordshire Zahnstangenlenkgetriebe
EP1086881A1 (fr) * 1999-09-24 2001-03-28 Renault Carter pour mécanisme de direction à pignon et crémaillère
WO2004076261A1 (fr) * 2003-02-26 2004-09-10 Schmitterchassis Gmbh Mecanisme de direction pour une servocommande electrique dans des vehicules
DE102010029603A1 (de) 2010-06-02 2011-12-08 Zf Lenksysteme Gmbh Vorrichtung zum Andrücken einer Zahnstange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114055403A (zh) * 2021-10-29 2022-02-18 富鼎电子科技(嘉善)有限公司 拆装装置
CN114055403B (zh) * 2021-10-29 2023-05-16 富翔精密工业(昆山)有限公司 拆装装置

Also Published As

Publication number Publication date
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