GB1085907A - Improvements in vehicle steering gears - Google Patents
Improvements in vehicle steering gearsInfo
- Publication number
- GB1085907A GB1085907A GB4821164A GB4821164A GB1085907A GB 1085907 A GB1085907 A GB 1085907A GB 4821164 A GB4821164 A GB 4821164A GB 4821164 A GB4821164 A GB 4821164A GB 1085907 A GB1085907 A GB 1085907A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- steering
- chambers
- fluid
- springs
- 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.)
- Expired
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
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
- B62D5/087—Sliding spool valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
- F15B9/12—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Power Steering Mechanism (AREA)
Abstract
1,085,907. Steering vehicles. ROBERT BOSCH G.m b.H Nov. 27, 1964 [Jan. 10, 1964]. No. 48211/64. Heading B7H. A power-assisted steering mechanism comprises a steering shaft 30 operable by the vehicle steering wheel and journalled at 31 in a shaft 25 having an extension 26 connected to the steering linkage. A toothed wheel 29 rotatably mounted on a shaft 33 meshes with teeth on the shaft 30 and with rack teeth on a power piston 23 which are also in mesh with gears 27 and 28 formed integrally with the shaft 25 so that rotation of the shaft 30 is transmitted to the steered wheels through gear 29, rack 23 and gears 27, 28. The shaft 33 is allowed limited pivotal movement about one end 34, its other end 35 operating a pressure fluid control system. Fluid from a reservoir 2 is supplied by a pump 1 through a pressure relief valve 55 to supply lines 5 and 6 and to an accumulator 3. The lines 5 and 6 lead to chambers 10, 10<SP>1</SP> which contain non-return valves 13, 131 loaded by springs 14, 141 which also load ball valves 16, 16<SP>1</SP> which are connected by stems 19, 19<SP>1</SP> with valves 20, 20<SP>1</SP>. The latter are located in chambers 18, 18<SP>1</SP> which are connected by passages 21, 21<SP>1</SP> to opposite ends of a cylinder 22 containing the rack piston 23. The chambers 18, 18<SP>1</SP> are separated from chambers 38, 38<SP>1</SP> by flexible diaphragms 39, 39<SP>1</SP> to which are attached metal discs 40, 40<SP>1</SP> through which are formed passages 41, 41<SP>1</SP> and which are acted upon by springs 42, 42<SP>1</SP>. Cylinders 37, 37<SP>1</SP> extend into the chambers 38, 381 and are slidable axially, being urged by springs 51, 51<SP>1</SP> towards a middle, neutral position, in which they bear against the spherical free end 35 of the shaft 33 with a small amount of play between their flanged ends and a shoulder formed in the valve casing. When the steering shaft 30 is rotated, the rack piston 23 is moved by the gear 29, during which operation the shaft 33 pivots about its end 34, thereby moving one of the cylinders 37, 371 into the chamber 38 or 38<SP>1</SP>, increasing the pressure therein so that the diaphragm 39 or 39<SP>1</SP> moves so as to unseat the associated valve, say valve 16. Fluid from the line 5 then passes through chamber 10 and passage 21 to act upon piston 23, so assisting the steering movement, while fluid displaced from the opposite end of cylinder 22 flows through passage 21<SP>1</SP>. The pressure in chamber 18<SP>1</SP> increases so that the diaphragm 39<SP>1</SP> moves away from the valve end 20<SP>1</SP> allowing the displaced fluid to pass through aperture 41<SP>1</SP>, through cylinder 37<SP>1</SP> and passages 53 and 54 to reservoir. At the given angle of steer, the apparatus is balanced by the springs 14, 14<SP>1</SP>, 42, 42<SP>1</SP> and 51, 51<SP>1</SP> in an hydraulically neutral position again, and the straight ahead position is resumed by rotating the steering wheel in the opposite direction, setting up the opposite conditions. At a given position of the steering wheel, road shocks react through piston 23 against fluid locked in the chambers 10, although, in a modification, the ball valves 13, 13<SP>1</SP> may be dispensed with, in which case the hydraulic system acts to re-centre the wheels. The springs 51, 51<SP>1</SP> may also be omitted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB74935A DE1214554B (en) | 1964-01-10 | 1964-01-10 | Hydraulic power steering, in particular for motor vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1085907A true GB1085907A (en) | 1967-10-04 |
Family
ID=6978465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4821164A Expired GB1085907A (en) | 1964-01-10 | 1964-11-27 | Improvements in vehicle steering gears |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT254721B (en) |
DE (1) | DE1214554B (en) |
GB (1) | GB1085907A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2301415A1 (en) * | 1973-01-12 | 1974-07-18 | Daimler Benz Ag | POWER STEERING FOR VEHICLES, IN PARTICULAR FOR MOTOR VEHICLES |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1003611B (en) * | 1955-10-26 | 1957-02-28 | Zahnradfabrik Friedrichshafen | Power steering |
DE1021735B (en) * | 1956-04-19 | 1957-12-27 | Teves Kg Alfred | Hydraulic power steering, in particular for motor vehicles |
-
1964
- 1964-01-10 DE DEB74935A patent/DE1214554B/en active Pending
- 1964-09-02 AT AT757864A patent/AT254721B/en active
- 1964-11-27 GB GB4821164A patent/GB1085907A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AT254721B (en) | 1967-06-12 |
DE1214554B (en) | 1966-04-14 |
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