GB2328191A - Rack and pinion steering gear - Google Patents
Rack and pinion steering gear Download PDFInfo
- Publication number
- GB2328191A GB2328191A GB9717124A GB9717124A GB2328191A GB 2328191 A GB2328191 A GB 2328191A GB 9717124 A GB9717124 A GB 9717124A GB 9717124 A GB9717124 A GB 9717124A GB 2328191 A GB2328191 A GB 2328191A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rack
- rack bar
- steering mechanism
- pinion steering
- mechanism according
- 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.)
- Withdrawn
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
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
- B62D5/22—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/22—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system
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)
Abstract
The rack and pinion steering mechanism comprises a rack bar 12 mounted for linear movement in a rack bar housing 10. The ends of the rack bar 12 carry respective transverse arms 14, 16 interconnected by a rigid tie member 18 extending alongside the rack bar housing 10. Respective ball joints 20, 22 through which movement of the rack bar 12 is transmitted to track rods 24,26 are positioned by the respective arms offset from the line of movement of the rack bar. This allows increased levels of steering geometry tuning. The rigid tie member 18 can be the piston rod of a power assistance unit 20. Also, a damper 28 may be provided for the steering mechanism. The damper comprises a housing 30 and a damper rod 32 connected to ones of the arms 14,16.
Description
VEHICLE STEERING MECHANISMS
The invention relates to a rack and pinion steering mechanism for a motor vehicle.
A typical rack and pinion steering mechanism comprises a rack bar mounted for linear movement in a rack bar housing, the rack bar carrying a ball joint at each end through which movement is transmitted to a track rod. An arrangement of that kind can be seen in GB-A-1 580 531. When tuning steering geometry, the long established mounting of the ball joints on the rack bar requires the designer to make adjustments in other areas of the steering geometry and an object of the present invention is to provide a rack and pinion steering mechanism which will provide increased levels of steering geometry tuning.
According to one aspect of the invention there is provided a rack and pinion steering mechanism for a motor vehicle comprising a rack bar mounted for linear movement in a rack bar housing, the ends of the rack bar carrying respective transverse arms interconnected by a rigid tie member extending alongside the rack bar housing, and respective ball joints through which movement of the rack bar is transmitted to track rods, the ball joints being positioned by the respective arms offset from the line of movement of the rack bar.
Such an arrangement permits the position of the ball joints to be selected appropriately when tuning the steering geometry for a particular vehicle as the mechanism does not require the ball joints to be mounted at the ends of the rack bar.
Preferably, the tie member is parallel with the rack bar.
In a preferred embodiment, the ball joints are arranged in line with respective ends of the tie member.
The tie member may be a drive output member of a power assistance unit. In such a case, the drive output member may be a piston rod of the power assistance unit.
A damper may be provided for damping the steering movement and may be attached to one of the transverse arms and to a stationary part of the steering mechanism. The damper may be attached to one of the arms at a position between the associated ball joint and the rack bar.
According to a further aspect of the invention there is provided a motor vehicle having a rack and pinion steering mechanism according to the first aspect of the invention or to any other consistory clauses related thereto.
A rack and pinion steering mechanism in accordance with the invention will now be described by way of example with reference to the accompanying drawing which is a plan view of the rack and pinion mechanism.
The rack and pinion steering mechanism comprises a rack bar housing 10 of known kind having therein a rack bar 12. The rack bar 12 is movable linearly by rotation of a pinion shaft 13 connected, in use, to a steering column of the vehicle.
In accordance with the invention, the ends of the rack bar 12 carry respective transverse arms 14, 16. Ends of the arms 16 spaced from the rack bar 12 are interconnected by a piston rod 18 of a power assistance unit 20 of known kind. The piston rod 18 is parallel with the rack bar 12.
The ends of the arms 16 adjacent the piston rod 18 carry respective ball joints 20, 22 which are connected to respective track rods 24, 26.
A damper 28 may be provided for the steering mechanism. The damper 28 comprises a housing 30 connected to, for example, the rack housing 10 and a damper rod 32 connected to the arm 16. The damper 28 could, instead, be arranged such that the damper rod 32 is connected to the transverse arm 14.
The steering mechanism may be of a non-power assisted type. In such a case, the piston rod 18 would be replaced by a suitable rigid member such as a bar which interconnects the arms 14, 16.
In a conventional rack and pinion steering mechanism, the ball joints 20, 22 would be arranged at the ends of the rack bar 12 on the line of movement thereof. The provision of the arms 14, 16 offer the designer greater flexibility over the positioning of the ball joints 20, 22 relative to the
rack bar 12 thereby providing increased levels of steering geometry tuning.
Claims (10)
1. A rack and pinion steering mechanism for a motor vehicle comprising a
rack bar mounted for linear movement in a rack bar housing, the ends of
the rack bar carrying respective transverse arms interconnected by a
rigid tie member extending alongside the rack bar housing, and
respective ball joints through which movement of the rack bar is
transmitted to track rods, the ball joints being positioned by the
respective arms offset from the line of movement of the rack bar.
2. A rack and pinion steering mechanism according to Claim 1 in which the
tie member is parallel with the rack bar.
3. A rack and pinion steering mechanism according to Claim 1 or 2 in which
the ball joints are arranged in line with respective ends of the tie
member.
4. A rack and pinion steering mechanism according to Claim 1, 2 or 3 in
which the tie member is a drive output member of a power assistance
unit.
5. A rack and pinion mechanism according to Claim 4 in which the drive
output member is a piston rod.
6. A rack and pinion steering mechanism according to any preceding claim
in which a damper is provided for damping steering movement.
7. A rack and pinion steering mechanism according to Claim 6 in which the
damper is attached to one of the arms and to a stationary part of the
steering mechanism.
8. A rack and pinion steering mechanism according to Claim 7 in which the
damper is attached to one of the arms at a position between the
associated ball joint and the rack bar.
9. A rack and pinion steering mechanism for a motor vehicle constructed
and arranged substantially as described herein with reference to the
accompanying drawing.
10. A motor vehicle having a rack and pinion steering mechanism according
to any preceding claim.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9717124A GB2328191A (en) | 1997-08-14 | 1997-08-14 | Rack and pinion steering gear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9717124A GB2328191A (en) | 1997-08-14 | 1997-08-14 | Rack and pinion steering gear |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9717124D0 GB9717124D0 (en) | 1997-10-22 |
GB2328191A true GB2328191A (en) | 1999-02-17 |
Family
ID=10817409
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9717124A Withdrawn GB2328191A (en) | 1997-08-14 | 1997-08-14 | Rack and pinion steering gear |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2328191A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005023625A1 (en) * | 2003-08-05 | 2005-03-17 | Thyssenkrupp Presta Steertec Gmbh | Steering gear for a motor vehicle |
WO2005054038A1 (en) * | 2003-12-05 | 2005-06-16 | Zf Lenksysteme Gmbh | Rack servo-assisted steering |
WO2005080178A1 (en) * | 2004-02-18 | 2005-09-01 | Zf Lenksysteme Gmbh | Hydraulic power assisted steering system |
ES2278540A1 (en) * | 2005-03-31 | 2007-08-01 | Kayaba Industry Co., Ltd. | Power steering apparatus |
CN108128347A (en) * | 2017-12-21 | 2018-06-08 | 芜湖恒隆汽车转向***有限公司 | A kind of supporting and limiting device and method for supporting of rack-and-pinion manual steering gear |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1234482A (en) * | 1968-07-01 | 1971-06-03 | ||
US3944015A (en) * | 1973-10-26 | 1976-03-16 | Bishop Arthur E | Rack and pinion steering gear |
US4663980A (en) * | 1983-08-09 | 1987-05-12 | Nissan Motor Co., Ltd. | Rack and pinion steering gear |
EP0371852A1 (en) * | 1988-11-29 | 1990-06-06 | Regie Nationale Des Usines Renault | Steering device for the rear wheels of a vehicle with four-wheel steering |
WO1992005061A1 (en) * | 1990-09-21 | 1992-04-02 | Zahnradfabrik Friedrichshafen Ag | Power-assisted rack-and-pinion steering for motor vehicles, in particular heavy vehicles |
DE4328156C1 (en) * | 1993-08-21 | 1994-10-06 | Daimler Benz Ag | Toothed rack steering system for steerable wheels which are assigned to an axle of a vehicle |
DE4422559A1 (en) * | 1994-06-28 | 1995-07-27 | Daimler Benz Ag | Rack and pinion steering for vehicle |
-
1997
- 1997-08-14 GB GB9717124A patent/GB2328191A/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1234482A (en) * | 1968-07-01 | 1971-06-03 | ||
US3944015A (en) * | 1973-10-26 | 1976-03-16 | Bishop Arthur E | Rack and pinion steering gear |
US4663980A (en) * | 1983-08-09 | 1987-05-12 | Nissan Motor Co., Ltd. | Rack and pinion steering gear |
EP0371852A1 (en) * | 1988-11-29 | 1990-06-06 | Regie Nationale Des Usines Renault | Steering device for the rear wheels of a vehicle with four-wheel steering |
WO1992005061A1 (en) * | 1990-09-21 | 1992-04-02 | Zahnradfabrik Friedrichshafen Ag | Power-assisted rack-and-pinion steering for motor vehicles, in particular heavy vehicles |
DE4328156C1 (en) * | 1993-08-21 | 1994-10-06 | Daimler Benz Ag | Toothed rack steering system for steerable wheels which are assigned to an axle of a vehicle |
DE4422559A1 (en) * | 1994-06-28 | 1995-07-27 | Daimler Benz Ag | Rack and pinion steering for vehicle |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005023625A1 (en) * | 2003-08-05 | 2005-03-17 | Thyssenkrupp Presta Steertec Gmbh | Steering gear for a motor vehicle |
CN100448727C (en) * | 2003-08-05 | 2009-01-07 | 蒂森克鲁伯普雷斯塔转向技术有限公司 | Steering gear for a motor vehicle |
WO2005054038A1 (en) * | 2003-12-05 | 2005-06-16 | Zf Lenksysteme Gmbh | Rack servo-assisted steering |
WO2005080178A1 (en) * | 2004-02-18 | 2005-09-01 | Zf Lenksysteme Gmbh | Hydraulic power assisted steering system |
US7942230B2 (en) | 2004-02-18 | 2011-05-17 | Zf Lenksysteme Gmbh | Hydraulic power steering system |
ES2278540A1 (en) * | 2005-03-31 | 2007-08-01 | Kayaba Industry Co., Ltd. | Power steering apparatus |
CN108128347A (en) * | 2017-12-21 | 2018-06-08 | 芜湖恒隆汽车转向***有限公司 | A kind of supporting and limiting device and method for supporting of rack-and-pinion manual steering gear |
Also Published As
Publication number | Publication date |
---|---|
GB9717124D0 (en) | 1997-10-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |