WO2004020877A1 - Poussoir pour direction à crémaillère de véhicule automobile - Google Patents
Poussoir pour direction à crémaillère de véhicule automobile Download PDFInfo
- Publication number
- WO2004020877A1 WO2004020877A1 PCT/FR2003/002394 FR0302394W WO2004020877A1 WO 2004020877 A1 WO2004020877 A1 WO 2004020877A1 FR 0302394 W FR0302394 W FR 0302394W WO 2004020877 A1 WO2004020877 A1 WO 2004020877A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pusher
- rack
- steering
- casing
- elastic support
- Prior art date
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
Definitions
- the present invention relates, in general, to steering systems for motor vehicles. It relates, more particularly, to the mechanical rack-and-pinion directions, provided with a device known as a "push line" which ensures permanent contact of the rack with the steering pinion, by compensating for the play. Even more specifically, the invention is concerned with the structure of the pusher proper of such a device, that is to say the part which, urged by elastic means, comes to bear against the back of the rack, to apply it against the steering gear, said pusher being guided in sliding in the steering casing, or in a tubular part integral with this steering casing.
- the pusher itself has a cylindrical, smooth side face which cooperates with the steering casing or with a tubular part integral with this steering casing.
- the present invention aims to avoid these drawbacks, therefore to eliminate the radial clearance between the pusher and the steering casing, so as to reduce noise, by a simple and economical technical solution.
- the invention essentially relates to a pusher for rack-and-pinion steering of a motor vehicle, as specified in the introduction, which pusher is provided, at its periphery, with elastic support tabs, which cooperate with the inner wall of the steering casing, or of the tubular part integral with this casing, in which said pusher is guided in sliding.
- the elastic support tabs are made in one piece, in particular by molding, with the body of the pusher.
- These elastic support tabs preferably comprise a first series of tabs distributed around the pusher, towards its end remote from the rack, and a second series of tabs distributed around the pusher, towards its end resting on the rack.
- Each of the two series of elastic support tabs advantageously comprises tabs regularly distributed around the pusher, for example four tabs, distributed at regular angular intervals of 90 °, the pusher being in this case provided, in total, with eight tabs '' elastic support.
- each elastic support tongue takes place, at least partially, in a corresponding recess hollowed out in the body of the pusher, the tongue having, due to its elasticity, mobility relative to the corresponding recess, allowing it to be more or less pressed into this recess.
- each recess advantageously presenting itself as a groove formed at the periphery of the pusher, parallel to its axis, the corresponding tongue comprises an arm attached to one end of the groove and extending in the longitudinal direction of this groove, and an enlarged head formed at the free end of the arm, this head cooperating with the inner wall of the steering casing or of the tubular part integral with this casing.
- the support tabs pressed elastically against the inner wall of the steering casing, eliminate the radial clearance between the pusher and the casing, and therefore avoid noise due to the lateral movements of the pusher.
- the support tabs are more or less strongly constrained, which slows down the axial movement of the pusher, and also reduces noise. generated by this axial displacement.
- the noise reduction is obtained without any additional part.
- the number and arrangement of the support tabs ensure balanced, centered and precise mounting and guidance of the pusher.
- Figure 1 is an axial sectional view of a rack pusher direction line
- Figure 2 is a side view of the pusher according to the invention, on a larger scale
- Figure 3 is an end view of the pusher of Figure 2;
- Figure 4 is a partial sectional view of this pusher, on an even larger scale, showing the detail of a support tab, in the free state;
- Figure 6 is a view similar to Figure 4, but showing the tongue in the bent state, bearing on the steering housing.
- FIG. 1 partially represents a rack-and-pinion steering of a motor vehicle, and it shows in particular the casing 2 housing the steering pinion 3 and the rack 4, the toothing of which 4a engages the pinion 3, coupled to the steering column (not shown).
- the steering casing 2 has a tubular part 2a, open towards the outside, the central axis A of which extends orthogonally to the respective axes of the pinion 3 and the rack 4.
- the tubular part 2a has a cylindrical inner wall 2b, smooth.
- the elements of the pusher line, described below, are housed inside the tubular part 2a of the casing 2.
- These elements include a pusher proper 5, guided in sliding along the axis A in the tubular part 2a.
- a pusher proper 5 guided in sliding along the axis A in the tubular part 2a.
- the pusher 5 comes into contact with this back 4b directly, or by means of a support pad.
- the tubular part 2a of the casing 2 is closed by an adjusting screw
- a spring 7, or other elastic element, is compressed between the adjusting screw 6 and the pusher 5, the spring 7 being partially housed in a central recess 8 of the pusher 5.
- the pusher 5 has a cylindrical lateral surface 9, which extends between a planar end 10, remote from the rack 4, and a concave profile end 11, adapted to the back 4b of the rack 4 and supported on this rack 4 by the thrust of the spring 7.
- the cylindrical lateral surface 9 of the pusher 5 has a diameter d, slightly less than the inside diameter D of the part tubular 2a of the casing 2.
- a radial clearance e is thus present between the body of the pusher 5, on the one hand, and the inner wall 2b of the tubular part 2a, on the other hand - see in particular Figure 6.
- the central recess 8 of the pusher 5 opens onto the flat end 10 of this pusher 5.
- the pusher 5 is provided, at its periphery, with several elastic tongues 12 which, when this pusher 5 is mounted, cooperate with the inner wall 2b of the tubular part 2a of the casing 2, coming to bear against this wall 2b.
- the elastic support tongues 12 are a total of eight; they include a first series of four tabs 12, distributed around the pusher 5 towards its end 10 remote from the rack 4, and a second series of four tabs 12, distributed around the pusher 5 towards its end 11 supported on the back 4b of the rack 4. In each series, the four tabs 12 are distributed at regular angular intervals of 90 °.
- each tongue 12 takes place, partially, in a corresponding recess 13 which is hollowed out in the body of the pusher 5.
- Each recess 13 is in the form of a short groove of rectangular section (see in particular Figures 3 and 5), which extends parallel to the axis A of the pusher 5.
- the recesses 13 are thus hollowed out in the cylindrical lateral surface 9 of the pusher 5, four of these recesses 13 also opening at the end 10 of the pusher 5, and the other four recesses 13 emerging at the opposite end 11 of the pusher 5.
- Each tongue 12 comprises, as shown in Figures 4 and 6, an arm 12a terminated by an enlarged head 12b.
- the arm 12a is attached to the body of the pusher 5, at one end of the groove (recess) 13, and it extends in the longitudinal direction of this groove 13, that is to say substantially parallel to the axis of the pusher 5.
- the enlarged head 12b formed at the free end of the arm 12a, has a rounded profile, which is turned towards the outside (radially) of the pusher 5.
- a gap 14 remains between each tongue 12 and the wall of the corresponding recess 13, to authorize the bending of this tongue 12.
- the tongue 12 In the free state, as shown in FIG. 4, the tongue 12 extends parallel to the axis of the pusher 5, the gap 14 between this tongue 12 and the bottom of the groove (recess) 13 then having its value Max.
- the movement of the pusher 5 according to the axis A is more or less braked, which also reduces the noise generated by this axial movement.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Transmission Devices (AREA)
- Gears, Cams (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10393210T DE10393210T5 (de) | 2002-09-02 | 2003-07-29 | Andruckteil für eine Kraftfahrzeugzahnstangenlenkung |
AU2003269074A AU2003269074A1 (en) | 2002-09-02 | 2003-07-29 | Yoke for rack-and-pinion steering of a motor vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/10839 | 2002-09-02 | ||
FR0210839A FR2844020B1 (fr) | 2002-09-02 | 2002-09-02 | Poussoir pour direction a cremaillere de vehicule automobile |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004020877A1 true WO2004020877A1 (fr) | 2004-03-11 |
Family
ID=31503043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/002394 WO2004020877A1 (fr) | 2002-09-02 | 2003-07-29 | Poussoir pour direction à crémaillère de véhicule automobile |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU2003269074A1 (fr) |
DE (1) | DE10393210T5 (fr) |
FR (1) | FR2844020B1 (fr) |
WO (1) | WO2004020877A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008026874B4 (de) * | 2008-06-05 | 2019-02-21 | Trw Automotive Gmbh | Vorrichtung zum Andrücken einer Zahnstange |
DE102009028031A1 (de) * | 2009-07-27 | 2011-02-03 | Zf Lenksysteme Gmbh | Druckstück zum Andrücken einer Zahnstange |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4683769A (en) * | 1984-07-20 | 1987-08-04 | Toyota Jidosha Kabushiki Kaisha | Rack guide in rack-and-pinion type steering gear |
US4785685A (en) * | 1986-04-09 | 1988-11-22 | Toyota Jidosha Kabushiki Kaisha | Rack guide of synthetic resin for a rack and pinion type steering device |
US4800770A (en) * | 1983-05-24 | 1989-01-31 | Toyota Jidosha Kabushiki Kaisha | Rack-and-pinion type steering gear for automotive vehicles |
FR2663284A1 (fr) | 1990-06-15 | 1991-12-20 | Renault | Carter pour mecanisme de direction a pignon et cremaillere. |
EP0758605A1 (fr) | 1995-08-15 | 1997-02-19 | Trw Inc. | Boîte de direction à crémaillère avec poussoir amélioré |
EP0860345A2 (fr) | 1997-02-25 | 1998-08-26 | Trw Inc. | Guidage pour crémaillère |
EP1136342A1 (fr) | 2000-03-22 | 2001-09-26 | Société de Mécanique d'Irigny | Ligne poussoir pour direction à crémaillère de véhicule automobile |
-
2002
- 2002-09-02 FR FR0210839A patent/FR2844020B1/fr not_active Expired - Fee Related
-
2003
- 2003-07-29 AU AU2003269074A patent/AU2003269074A1/en not_active Abandoned
- 2003-07-29 DE DE10393210T patent/DE10393210T5/de not_active Withdrawn
- 2003-07-29 WO PCT/FR2003/002394 patent/WO2004020877A1/fr not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4800770A (en) * | 1983-05-24 | 1989-01-31 | Toyota Jidosha Kabushiki Kaisha | Rack-and-pinion type steering gear for automotive vehicles |
US4683769A (en) * | 1984-07-20 | 1987-08-04 | Toyota Jidosha Kabushiki Kaisha | Rack guide in rack-and-pinion type steering gear |
US4785685A (en) * | 1986-04-09 | 1988-11-22 | Toyota Jidosha Kabushiki Kaisha | Rack guide of synthetic resin for a rack and pinion type steering device |
FR2663284A1 (fr) | 1990-06-15 | 1991-12-20 | Renault | Carter pour mecanisme de direction a pignon et cremaillere. |
EP0758605A1 (fr) | 1995-08-15 | 1997-02-19 | Trw Inc. | Boîte de direction à crémaillère avec poussoir amélioré |
EP0860345A2 (fr) | 1997-02-25 | 1998-08-26 | Trw Inc. | Guidage pour crémaillère |
EP1136342A1 (fr) | 2000-03-22 | 2001-09-26 | Société de Mécanique d'Irigny | Ligne poussoir pour direction à crémaillère de véhicule automobile |
Also Published As
Publication number | Publication date |
---|---|
FR2844020A1 (fr) | 2004-03-05 |
DE10393210T5 (de) | 2005-11-10 |
AU2003269074A1 (en) | 2004-03-19 |
FR2844020B1 (fr) | 2004-10-15 |
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