• 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:
    Two hydraulic brakes or clutches being primary users, are alternately, delayedly, hydraulically energized from a constant volumetric flow rate pump feeding also a secondary user via a pressure controller with a differential piston operated by feedback ducts from the primary users via a throttle valve. The latter valve is bypassed through a check valve for undelayed de-energization. A selector valve is disposed between the branch point for the secondary user and upstream as to energizing fluid from the feedback connection to the primary user. The pressure controller is described further as to several structural details.
    公开号:SU867327A3
    申请号:SU782610597
    申请日:1978-05-06
    公开日:1981-09-23
    发明作者:Риддер Герхард；Шэфер Вильхельм
    申请人:Маннесманн Аг (Фирма)；
    IPC主号:
    专利说明:

    (54) HYDRAULIC DEVICE
    one
    The invention relates to a volumetric hydraulic drive and can be used, for example, in vehicle hydraulic systems.
    A hydraulic device is known, comprising a pump with a discharge piping, a hydraulically activated clutch connected to the discharge piping of the commutating piping, a control valve in the coaxial piping, a two-sided stepped piston, a throttling body and a check valve for fast unloading from the larger piston surface 1.
    However, the known device is characterized by a first slow 20 increase in switch-on pressure, due to the operation of the throttling organ, to an intermediate value that is maintained for some time, and then, in the form of a 25 blow, rises to the pressure maintained in the clutch. In addition, during operation, a load-actuated transmission containing a clutch or brake, usually with a
    it is necessary to activate or deactivate not only the clutch or the brake with the help of oil under pressure; on the contrary, pressurized oil is also used, for example, for circulation lubrication. The required working pressure of this consumer is usually lower than the clutch switching pressure.
    The purpose of the invention is to create a time-controlled pressure in the pump discharge pipe when serving consumers with different operating pressures.
    The goal is achieved by the fact that the discharge pipeline is made with a branch to an additional consumer, the throttling body is located in this branch and the side of the smaller surface of the piston is connected directly to the discharge pipeline, and the side of the larger surface is connected between the control valve and the clutch control is connected to the discharge pipe between the pump and the pressure regulator.
    FIG. 1 is a schematic diagram of the hydraulic device; in fig. 2 is a simplified section of the pressure regulator in the initial position; in fig. 3 - 5 - three different positions of the pressure regulator.
    The hydraulic device contains a pump 1 with a discharge pipeline 2, a hydraulically activated clutch 3 connected to the discharge pipeline 2 switching pipe 4, control valve 5 in switching pipe 4, pressure regulator b with double-sided piston 7, throttling body 8 and check valve 9 for fast unloading from the side of the larger surface 10 of the piston 7. The discharge pipe 2 is made with a branch 11 to the additional consumer 12, the throttling body 8 is located in this branch 11 and the side of the smaller surface 13 of the piston 7 are connected directly to the discharge pipe 2 and the side of the larger surface 10 between the control valve 5 and the clutch .3 is connected by a control pipeline 14 to the coupling pipe 4, and the control valve 5 is connected to the discharge pipeline 2 between the pump 1 and pressure regulator 6. The pump 1 by the suction pipe 15 communicates with the reservoir for the working fluid 16. The hydraulic device is capable of controlling two clutches 3 and 17, the latter being connected with the control valve 5 by the switching pipeline 18, which in turn is connected by the regulating pipeline 19 also to the side of the larger surface 10 of the piston 7 Yes, the latter communicates only with the currently operating clutch 3 or 17 pressure regulator 6 contains switching the body 20, which the inlet pipe 21 communicates with the throttle 22. With the pipe 21 communicates the channel 23, which contains a check valve 9 connected through the channel 24 with the side of the larger surface 10 of the piston 7. The pipe 25, to which in conduit 26 is connected, as well as a discharge conduit 27 associated with the reservoir 16.
    The connections and functions of the just listed elements of pressure regulator 6 are explained in more detail when considering Figs. 2, which is described below.
    Depicted in FIG. 2 pressure regulator 6 consists mainly of a central housing 28, in which a double-sided piston 7 is installed, housing covers 29 and housing covers. The housing cover 30 is monolithic in the drawing, but practically it is assembled from several discs so that it can be performed openings, channels and means of regulation. For the sake of a clearer picture, all channels and means of adjustment are projected here on one plane.
    The differential piston 7 consists of a smaller piston 31 loaded with pressure from the injection pipe 2, made in one piece together with the throttling body 8 and adjacent through the throttling body 8 to the external stop 32, which is moved by means of the regulating mechanism 33 and connected to the housing cover 29 The smaller piston 31 corresponds to the side of the smaller surface 13 of the piston 7. The larger piston 34, corresponding to the side of the larger surface 10 of the piston 7, is connected to the smaller piston 31 through the compression springs 35 and 36. Bo longest piston
    34 under the action of these compression springs
    35 and 36 adjacent to the corresponding external stop 37, which can be moved using the adjusting mechanism 38.
    Arrow 39 symbolizes the inlet of oil under pressure at the point of connection of branch 11, another arrow 40 - the release of oil under pressure at the point of connection of additional consumer 12 (Fig. 1).
    In the place of installation of the piston 31, the central body 28 has an inlet annular channel 41, an outlet annular space 42 and an internal stop.
    权利要求:
    Claims (1)
    [1]
    In the upper part of FIG. 2, on the cover of the housing 30, the connecting points of the control piping 14 and 19 are visible. The control piping 14 and 19 are inserted into the through regulating hole 43, in which there is a floating regulating piston 44 moving between two symbolically indicated stops 45 and 46. the middle of the distance between the stops 45 and 46 branches off the inlet pipe 21 of the throttles 22, which is adjusted using the adjusting screw 47. To adjust the throttles 22, it is necessary to remove the screwed hatch 48. Opposite the inlet pipe 21, a duct 23 branches out, which passes in a closed cap 49 a drain hole 50, in which a floating piston 51 is located as an element of a check valve 9. A piston 51 in the position shown in the drawing, in which it is under load including pressure transmitted through the regulating pipe 19, locks the pipe 25. The drain hole 50 through channel 24 is connected to the side of the larger surface 10 of the piston 7. The housing 28 has an internal stop 52, and the throttling body 8 - grooves 53. Hydra The work of the device is as follows. When the regulator 6 (FIG. 2) loads the oil through the inlet annular channel 41 under pressure, the latter through the grooves 53 of the throttling body 8 hits the surface of the smaller piston 31 and pushes it against the action of the compression springs 35 and 36 in the direction of the larger piston 34 to a position (FIG. 3), in which the larger pore 34 fits to the corresponding external stop 37. At the same time, the grooves 53 extend far into the annular space 42 and thus ensure a sufficient flow of lubricating oil at an appropriate pressure constituting part of The pressure to the additional consumer 12. The pressure of the lubricant oil can be controlled by moving the external stop 37. If the clutch 18 is turned on by means of a corresponding action on the control valve 5 (Fig. 4), then in the regulating hole 43 first appears the pressure, which is part of the pressure that holds the regulating piston 44 in the position shown in the drawing or moves it to this position, as a result of which, firstly, the channel 23 and, consequently, the check valve 9 stop is loaded with oil under pressure in the closed position and, secondly, through the inlet pipe 21, the pressurized oil enters the throttle 22, through which it slowly flows to the surface 10 of the larger piston 34 and moves the larger piston 34 in the direction of the smaller piston 31, the opposing force holding the smaller piston 31 is not enough, and therefore the latter moves in the same direction as the larger piston 34, and the effective flow area of the slots 53 is reduced. This increases the pressure in the branch 11 and, therefore, in the control pipe 19. Thus, the larger piston 34 continues to move in the direction of the smaller piston 31 to fit to the internal stop 5 (Fig. 5). In this position, the springs 35 and 36 are highly compressed, and the smaller piston 31 occupies a position in which the grooves 53 have only a relatively small free passage. The latter has such dimensions, which still provide passage to an additional consumer 12, a sufficient amount of oil. If, however, the control valve 5 is turned on again, the input pipe 21 removes the load from the clutch 17, and therefore from the regulating pipe 19, the larger piston 34 will again move to the position shown in FIG. 3, and it will displace the oil moving the piston 51 of the check valve 9 until the oil can flow freely into the pipe 25, the claims of the invention A hydraulic device comprising a pump with a discharge pipe, hydraulically connected. my clutch connected to the discharge pipeline by the switching pipeline, the control valve in the switching pipeline, the pressure regulator with a two-sided stepped piston, a throttling body and a check valve for fast unloading from the larger surface of the piston, characterized in that in order to create a time-delayed pressure in the discharge pipe of the pump when servicing consumers with different working pressures, the discharge Pipe with a branch line will complement flax consumer drosselirunvdy organ situated in the side branch and lower surface of the piston is directly connected to a delivery conduit, and a larger surface side between the control valve and the clutch is connected to the switching conduit, said control valve connected to the delivery line between the pump and a pressure regulator. Sources of information taken into account during the examination 1. Acceptance for Germany of Germany 2512778, cl. F 16 H 5/14, 1975.
    49-i
    29
    / J
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    同族专利:
    公开号 | 公开日
    DE2724233B2|1981-04-16|
    FR2392289A1|1978-12-22|
    US4179887A|1979-12-25|
    BR7803305A|1979-02-06|
    ES468618A1|1979-07-16|
    NL7802794A|1978-11-28|
    GB1603571A|1981-11-25|
    JPS53146325A|1978-12-20|
    FR2392289B1|1983-07-01|
    DE2724233A1|1978-11-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2069275A|1935-02-06|1937-02-02|Du Pont|Phenolic compounds|
    US2737196A|1952-06-04|1956-03-06|Eaton Mfg Co|Flow divider valve|
    DE1044622B|1956-12-04|1958-11-20|Zahnradfabrik Friedrichshafen|Pressure control device|
    US3809201A|1970-10-30|1974-05-07|Kobe Steel Ltd|Modulating valve for vehicle transmission systems|
    JPS5025987B1|1971-01-21|1975-08-28|
    US3817266A|1972-03-20|1974-06-18|Trw Inc|Hydraulic system with flow control means to control pressure distribution between a primary and a secondary hydraulic circuit|
    US3978666A|1975-09-11|1976-09-07|Caterpillar Tractor Co.|Vehicle speed control apparatus and method|JPS5948902B2|1978-08-30|1984-11-29|Nissan Motor|
    DE3128108C2|1981-07-16|1983-04-28|Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co, 8000 München|Switching device for a power shiftable two-speed transmission driven by a hydraulic motor, in particular for mobile excavators|
    US4588357A|1984-07-24|1986-05-13|Power Draulics-Nielsen, Inc.|Hydraulic throttle control|
    US5375619A|1993-04-28|1994-12-27|Foster; Raymond K.|Protective circuit for pressure and return|
    GB2336641B|1998-04-25|2002-10-16|Agco Gmbh & Co|Hydraulic system for a power-take-off clutch|
    US8408363B2|2010-01-19|2013-04-02|Deere & Company|PTO lube control system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19772724233|DE2724233B2|1977-05-25|1977-05-25|Hydraulic device for the controlled, time-delayed pressure build-up in a clutch or brake|
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