GB2012911A - A Rack and Pinion Assembly - Google Patents

A Rack and Pinion Assembly

Info

Publication number
GB2012911A
GB2012911A GB7901413A GB7901413A GB2012911A GB 2012911 A GB2012911 A GB 2012911A GB 7901413 A GB7901413 A GB 7901413A GB 7901413 A GB7901413 A GB 7901413A GB 2012911 A GB2012911 A GB 2012911A
Authority
GB
United Kingdom
Prior art keywords
pinion
rack
engagement
rack bar
saddle
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.)
Granted
Application number
GB7901413A
Other versions
GB2012911B (en
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.)
TRW Steering Systems Ltd
Original Assignee
TRW Steering Systems Ltd
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 TRW Steering Systems Ltd filed Critical TRW Steering Systems Ltd
Priority to GB7901413A priority Critical patent/GB2012911B/en
Publication of GB2012911A publication Critical patent/GB2012911A/en
Application granted granted Critical
Publication of GB2012911B publication Critical patent/GB2012911B/en
Expired 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
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack
    • 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
    • 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
    • F16H2055/281—Cylindrical or half-cylindrical bushings around the rack, e.g. using special wedges to reduce play
    • 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

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

In a rack and pinion assembly in which a rack bar (1) is longitudinally displaceable through a housing (2) by rotation of a pinion (4) engaging with the rack (3), the rack bar (1) is supported in engagement with the pinion (4) by a plastics moulded bearing member (7) having a saddle- shaped bearing part (9) and a tubular retaining part (8) which is displaced longitudinally from the part (9). The bearing part (9) is of saddle-shape to straddle the rack bar (1) opposite to the region of engagement between the rack and pinion teeth and has a resilient bearing surface which biases the rack bar laterally into engagement with the pinion. The straddling portions of the saddle-shape restrain the rack bar from displacement in the direction of the pinion axis (4a). The retaining part (8) locates the bearing member (7) in the housing (2) and restrains that member from rotation (by keying engagement between rib (11) and channel (12)) and from longitudinal displacement by its co- operation in an annular recess (15). <IMAGE>
GB7901413A 1978-01-13 1979-01-15 Rack and pinion assembly Expired GB2012911B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7901413A GB2012911B (en) 1978-01-13 1979-01-15 Rack and pinion assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB142378 1978-01-13
GB7901413A GB2012911B (en) 1978-01-13 1979-01-15 Rack and pinion assembly

Publications (2)

Publication Number Publication Date
GB2012911A true GB2012911A (en) 1979-08-01
GB2012911B GB2012911B (en) 1982-06-23

Family

ID=26236731

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7901413A Expired GB2012911B (en) 1978-01-13 1979-01-15 Rack and pinion assembly

Country Status (1)

Country Link
GB (1) GB2012911B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369669A (en) * 1980-07-23 1983-01-25 Cam Gears Limited Rack and pinion assembly
EP1808355A1 (en) * 2006-01-12 2007-07-18 TRW ITALIA S.p.A. Steering group with longitudinally extended support element
DE102012019654A1 (en) * 2012-10-08 2014-04-10 Thyssenkrupp Presta Aktiengesellschaft Rack and pinion steering gear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369669A (en) * 1980-07-23 1983-01-25 Cam Gears Limited Rack and pinion assembly
EP1808355A1 (en) * 2006-01-12 2007-07-18 TRW ITALIA S.p.A. Steering group with longitudinally extended support element
DE102012019654A1 (en) * 2012-10-08 2014-04-10 Thyssenkrupp Presta Aktiengesellschaft Rack and pinion steering gear

Also Published As

Publication number Publication date
GB2012911B (en) 1982-06-23

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee