• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Improvements in power steering for motor vehicles, with two hydraulic steering circuits independent of each other, constituted by a servo motor in communication with a steering gear and by the corresponding control system for a first steering circuit, as well as by another coupled control system to the steering gear of a second steering circuit that goes in hydraulic communication with a servomotor acting on the steering linkage, characterized in that the two steering circuits carry pumps coupled to the engine of the vehicle, with a power designed to develop approximately half of the maximum power needed for the power steering and because the first steering circuit corresponds to the driving zone and reacts immediately when the steering wheel is operated, and because the second steering circuit corresponds to the parking area and is automatically connected , once the maximum pressure in the first steering circuit has been reached.
    公开号:SU833151A3
    申请号:SU782614699
    申请日:1978-05-03
    公开日:1981-05-23
    发明作者:Яблонски Эрих
    申请人:Цанрадфабрик Фридрихсхафен (Фирма)；
    IPC主号:
    专利说明:

    (St) VEHICLE STEERING SYSTEM FIG. 1 (increased); in fig. 3 - Raz cut BB in FIG. 1 (increased). The first control circuit includes the hydraulic tank 1, the first hydraulic pump 2, the control device 3 of the primary circuit and the first executive hydraulic cylinder 4 installed in the steering gear housing. The second one, operating separately from the first one, the control circuit consists of the hydraulic tank 5 and the second hydraulic pump 6 The control device 7 of the second circuit and the second actuating cylinder 8, connected by means of the hydraulic lines 9 to the device 7 and kinematically connected with the controlled wheels. The steering shaft 10, which is driven by a steering wheel not shown in the figures, is designed in its lower part as a steering gear worm 11. The working piston 12 is installed in the second actuating cylinder and is loaded through the chambers 13 and 14, while the gear segment 15 located in the chamber 13 interacts with the teeth of the working piston G2. The control device 3 of the first steering circuit has an operating piston 12. In addition, in the working piston 12 between the axial bearings 16 and 17, the control nut 18 of the steering transmission is positioned for limited rotation, and the toothed segment 15 is connected via a shaft 19 to the steered wheels . The driver 20 through the stop hole 21 in the working piston 12 enters the control plunger 22 of the control device 3. Two springs 23 acting on the driver on both sides and abutting the working piston 12 work as a centering device for the control nut 18, i.e. . serve to set the neutral position of the control plunger 22. The control plunger 22 mounted in the sleeve 24 has the ability to move from the neutral position relative to the previously established control gap bore 21. The hydraulic pump 2 is connected to the receiving cavities 25 and 26 of the control plunger 22 (Fig. 2). Seals 2730 serve to prevent the working fluid from leaking from cavities 25 and 26, to which, through open waving edges 31 or 32, control grooves 33 or 34, through holes 35 or 36, are connected to a central reverse groove 37 connected to the hydraulic tank 1. Therefore, in chambers 13 or 14, when working, hydraulic pump 2, working pressure cannot arise, the UE equalizing grooves 33 and 34 are connected to throttling openings, 38 or 39 and through hydraulic line 40.- with cameras 13 and 14. Return control edges 41 or 42 are also connected with grooves 33 and 34. Piston engines The grids 43 and 44 separate the reverse chambers 45 and 46. When the control plunger 22 is displaced, for example, to the left, the receiving cavity 25 through the open control edge 31 and through the control groove 33 connects to the pressure chamber 14. The other pressure chamber 13 through the control groove 34, the open return control edge 42 and through the opening 36 is connected to the central reverse groove 37, therefore the working piston 12 is displaced to the right. Since the working pressure present in the pumping chamber 14 through the throttling orifice 38 simultaneously acts in the chamber 45 of the reverse action, the opposite force acts on the control plunger 22 opposite to the displacement. Since the control groove 34 is unloaded, the reverse action chamber 46 remains neutral with respect to pressure. This hydraulic force, directed in the reversal chamber 45 to the leash 20, is noticeable on the steering wheel and creates a so-called control effect. The control device 7 of the second circuit (Figs. 1. and 3) consists of two control plungers 47 and 48, which are installed perpendicularly and eccentrically relative to the axis of the steering shaft 10 in the head 49 of the steering screw 11. The steering shaft 10 is attached to the steering 11 through the torSION 50. Two of the fingers 51 and 52 at the lower end of the steering shaft 10 pass through the holes 53 and 54 in the head 49 and enter the control plungers 47 and 48, so they start, turning movement, rotating with the head 49 moves relative to each other in the axial direction . At the same time, control grooves made on the control plungers 47 and 48, which are closed or open, respectively, receive the working fluid from the discharge cavity of the actuating hydraulic cylinder 8, while the working fluid from the other discharge cavity goes into the hydraulic tank 5. Hydraulic pump 6 ( Fig. 3) supplies the working fluid from the hydraulic tank 5 to the receiving cavity 55. When the steering wheel is rotated, the control plungers 47 and 48 installed in the sleeves 56 in accordance with the direction of rotation move relative to each other from the shown ytralnogo predelgah position to control the gap ustanovpenno b by means of openings 53 and §4 (Figure 1.) in the die 49. From the cavity 55 through a hydraulic fluid control kschie grooves 57 enters the pressure chamber 58 or 59.
    The exit from the injection cavity 5§ or 58 of the working fluid occurs through the return control groove 60, as well as through the annular groove 61 into the hydraulic tank 5. In the neutral position of the control plungers 47 and 48 all control valves, the grooves are open, therefore oil passage from hydraulic pump b to hydraulic tank 5. In the front side of the control pistons 47 and 48 are correspondingly centering devices 62, which, on the one hand, serve for precise adjustment of the control pistons relative to the control grooves, and the other side, support the torso 50 during the return movement of the control plunger in the neutral position. Between the receiving cavity 55 and the annular grooves 61 associated with the hydraulic tank 5, a check valve 63 is installed which, in case of accidental failure of the hydraulic pump 6 or when the vehicle engine is not running, provides the working fluid.
    The springs -23 used in the first steering circuit and the torsion bar 50, mounted on the second steering circuit, act as return elements for setting the control plungers 22, 47 and 48 in a neutral position. The return elements have different rigidity, therefore a different control response is achieved 3 and 7- In this case, relatively rigid torsion bar 50 and weak springs-23 are installed.
    At. first turning the steering shaft 10 by means of the control nut. 18 and the driver 20, the control plunger 22 is displaced, therefore, a working pressure occurs in the chambers 13 or 14. The control device 7 maintains its neutral position (Fig. 3). Only in the case when the manual force on the steering shaft 10 increases and the rotational resistance increases, for example, when turning in place or off-road, does the torsion bar 50 experience elastic twisting, therefore the control pistons 47 and 48 move relative to each other. However, in accordance with the direction of rotation, the injection cavity 58 or 59 of the actuating hydraulic cylinder 8 is connected. As soon as the rotary force on the steering shaft 10 is reduced again, the control plungers 48 and 47 are returned to neutral by means of the torsion force 50 and centering device 62. position, with the result that only the first steering circuit is enabled.
    The proposed steering is preferably performed in such a way that both hydraulic pumps are driven by the engine of the vehicle; therefore, in case of malfunctions in the first or second circuits, due to damage to the mains or the failure of the hydraulic pumps, the auxiliary action of one of the circuits is retained. vehicle steering is maintained with a slightly increased amount of manual effort. ,
    ts
    权利要求:
    Claims (1)
    [1]
    1. The patent of Germany 1133642, cl. In 62 D 5/06, 1976 (prototype).
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    类似技术:
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    US3481147A|1969-12-02|Hydraulic power system
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    SU833151A3|1981-05-23|Hydraulic steering gear of transport device
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    KR19980030922A|1998-07-25|Heavy Equipment Steering System
    DE1914723A1|1970-12-17|Control valve for hydraulic drives
    同族专利:
    公开号 | 公开日
    DE2719895B2|1979-11-08|
    JPS549840A|1979-01-25|
    JPS6216B2|1987-01-06|
    GB1597057A|1981-09-03|
    DE2719895C3|1980-07-17|
    IT7849172D0|1978-05-03|
    IT1102057B|1985-10-07|
    FR2389524A1|1978-12-01|
    DE2719895A1|1978-11-16|
    ES469348A1|1979-01-16|
    SE436635B|1985-01-14|
    BR7802808A|1978-12-12|
    FR2389524B1|1983-11-25|
    SE7805067L|1978-11-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2503570C1|2010-01-11|2014-01-10|Сканиа Св Аб|Device for active vehicle steering control and steering mechanism with such device|DE1655927C3|1967-04-08|1980-03-27|Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen|Power steering device, in particular for special vehicles|
    ES364290A1|1968-04-13|1971-01-01|Zahnradfabrik Friedrichshafen|Servosteering system|
    US3822759A|1972-03-07|1974-07-09|Sheppard Co Inc R|Power steering gear assembly|
    US3893528A|1974-09-17|1975-07-08|Gen Motors Corp|Front brake steering assist|DE2918975C2|1979-05-11|1982-10-21|Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen|Power steering for motor vehicles|
    DE3109851C2|1981-03-14|1987-06-04|Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen, De|
    GB2151996B|1983-12-09|1987-04-23|Trw Cam Gears Ltd|Power assisted steering system|
    JPS60206775A|1984-03-29|1985-10-18|Kayaba Ind Co Ltd|Power steering apparatus|
    IT1180549B|1984-11-16|1987-09-23|Riva Colzoni Spa|POWER STEERING FOR VEHICLES INCLUDING TWO SERVO ASSISTED OPERATING GROUPS WITH INDEPEDENT OPERATION|
    DE10234596B3|2002-07-30|2004-01-22|Daimlerchrysler Ag|As recirculating ball steering trained electric power steering a motor vehicle|
    ES2691409T3|2011-12-15|2018-11-27|Rheinmetall MAN Military Vehicles Österreich GesmbH|Steering system acting bilaterally for utility vehicles|
    CN111186483B|2020-02-28|2022-02-01|山东交通学院|Steering hydraulic pump suitable for heavy vehicle emergency working condition|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19772719895|DE2719895C3|1977-05-04|1977-05-04|Power steering for motor vehicles|
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