• 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:
    A hydraulic system for feeding a plurality of independent hydraulic servo-operated devices, such as servo-assisted brakes, clutch and/or servo-operated steering, in which a single pump draws fluid from a common reservoir and fluid pressure is automatically distributed by one or more modulating valves to the or each of the devices requiring power at any one time. The or each modulating valve comprises at least one piston in a cylinder, the piston being displaced by an increase in pressure due to displacement of one or more operating member such as brake or clutch pedal, or steering wheel, this controlling the flow of fluid through an axial passage in the piston by controlling its proximity to a valve shutter element and thereby controlling the fluid pressure in a chamber of the modulating valve, which pressure is fed to a control chamber of at least one distributor associated with a servo actuator of one of the servo operated devices of the system whereby to control the operating pressure applied to this.
    公开号:SU959640A3
    申请号:SU772506594
    申请日:1977-07-19
    公开日:1982-09-15
    发明作者:Амедеи Джузеппе；Риветти Энрико；Бертоне Антонио
    申请人:Фиат Сочиета Пер Ациони (Фирма)；
    IPC主号:
    专利说明:

    (S) HYDRAULIC DRIVE
    The invention relates to hydraulic systems comprising several actuators operating independently of each other, for example, a vehicle hydraulic system. A hydraulic drive is known that contains three actuating cylinders communicated with a pump through a distribution device, and pressure and drainage lines (l.; A disadvantage of the known hydraulic drive is the complexity of the design and low reliability due to the presence of a separate distributor for each actuating cylinder. The purpose of the invention is to simplify the design and increase the reliability of the hydraulic drive. This goal is achieved by the fact that in the hydraulic drive distribution, the separating device contains two similar distribute l, each of which is designed as a cylindrical body with a two-stage spring-loaded piston located in it, dividing the body into two chambers and having axial and transverse channels, and spring-loaded locking element for interaction with the axial channel of the piston, while the first chamber of one distributor communicates with the pressure with one of the executive cylinders and through axial and transverse channels - with the first chamber of the second distributor, which, in turn, communicates with the second actuating cylinder and through anal piston - a third executive tsilindg set, wherein the second first distributor chamber communicates with the first slave cylinder and the second chamber of the second distributor - with the second operating cylinder. . The drawing shows a hydraulic circuit diagram. The hydraulic actuator contains executive cylinders 1,2 and 3 of the steering control, brakes and. clutches respectively communicated with the pump. k through, switchgear. containing similar distributors 5 and 6, made in the form of cylindrical bodies 7 and 8 with two-stage pistons 9 and 10 located in them, spring-loaded springs 11 and 12, and locking elements 13 and 14, spring-loaded springs 15 and 16. Pistons 9, and 10 divides the housings 7 and 8 into chambers 17 and 18 and 19 and 20. Accordingly, axial 21 and 22 and transverse 23 and 24 channels are made in pistons 9 and TH. The chamber 17 distributes the bodies 5 communicates with the pressure, hydroline 25, with cylinder 2 by hydroline 2b and through channels 21 and 23 - with the chamber 19 of the distributor 6 with hydraulic line 27. Chamber 19 of the distributor 6 communicates with the cylinder 3 with hydraulic line 28 and through channels 22,2.4 - with cylinder 1 by hydroline 29. Camera 18 of distributor 5 communicates with cylinder 2 by hydrolysis 30, and camera 20 of distributor 6 with cylinder 3 by hydroline 31. Cylinder 1 communicates with hydraulic line 29 and drain hydroline 32 through distributor 33, cylinder 2 with hydraulic line 2b and drain hydroline 34 through the distributor 35. and cyl Ndr 3 with hydrolines 28, 31 and drain with hydroline 34 through distributors. Distributors 35 and 3b contain stepped pistons 37 and 38, spring-loaded springs 39 and 40, and locking elements 41 and 42, spring-loaded springs 43 44. Pistons 37.38 split housings 45 and 46 of distributors 35 and 3B to chambers 47 and 48 and 49 and 50. Axial 51 and 52 and transverse 53 and 54 channels are made in pistons 37 and 38 Piston 55 of cylinder 2 of the cylinder is connected to brake pedal 56, piston 57 of distributor 33 is connected with the steering wheel 58 through a gear mechanism 59- Piston 60 of cylinder 3 - divided it into chambers 6T and B2. The chamber 62 is in fluid communication 63 with the clutch master cylinder 64 connected to the clutch pedal 65. In the bodies 45 and 46, the locking elements 41 and 42 form chambers 66 and 67, respectively, and the stepped pistons 37 and 38 are provided with pairs of sealing rings 68 and 69, respectively. Camera 47 using channel 70, made in housing 45 of distributor 35, communicates with camera 71 of cylinder 2 brakes, and camera 49 via channel 72, made in box 9 of bus 46 distributor 3bi, with camera 61 of cylinder 3 clutches. The camera 48 of the distributor 35 communicates with the brake system 73 of the automobile (not shown) by the pipeline 74 and the brake hose 75, while the pipeline 74 is connected by a branch 76 to the compression chamber 77 of the cylinder 2 brakes, and the camera 66 of the distributor 35 communicates with a hydraulic line 78 with the camera 17 of the distributor 5. Transverse the distributor channel 24 6 is in fluid communication 29 with the inner chamber 79 of the distributor 33 of the steering cylinder 1. The distributor 33 is made in the form of a cylinder B, in the inner chamber 79 of which a piston 57 is installed, dividing it with its trains 81, 82 and 83 into two control chambers 84 and 85, Chambers 84 and 85, with hydraulic lines 86 and 87 communicating with cameras 88 and 89, respectively the steering cylinder 1, and the hydraulic lines 90 and 91 - with drain line 32. The chambers 88 and 89 of the cylinder 1 are formed by a piston 92 with a rod 93.. The piston 57 of the distributor 33 is spring-loaded spring 94, and its rod 95 gears 59. Pistons 9 and 10 of the valves 5 and 6 are equipped with sealing rings 96 and 97, respectively. The housings 45 and 46 of the distributors 35 and 36 are provided with protrusions 98 and 99, respectively, for interacting with the locking elements 41 and 42. The hydraulic actuator operates as follows. The working fluid from the pump 4 flows along hydraulic line 25 to the chamber 17 of the distributor 5, from where it travels through the axial channel 21 and the transverse channel 23 via hydroline 27 to the chamber 19 of the distributor 6. From the chamber 19, the liquid can flow either through the hydroline 28 to the distributor 36 or through the channels 23 and 24 of the piston 10 nd of the hydroline 29 through the distributor 33 to the steering cylinder 1, control. The fluid supplied under pressure into the chamber 17 of the distributor 5 can also flow along the hydraulic line 26 to the distributor 35 connected to the brake cylinder 2, where it enters the chamber 47 of the distributor 35. Any of the three cylinders 1,2,3 can operate independently of each other. , from a friend, or all three cylinders can work together at any time, without affecting the work of the other. For example, if the clutch pedal B5 is pressed, the clutch master cylinder 6 supplies pressurized fluid to the hydraulic line 63 supplied to the cylinder 3 in its chamber 62, causing the piston 60 to move to the left. From the chamber 62, the liquid is also supplied to the chamber 50 of the distributor 36 of the cylinder 3 the piston 38 is displaced to the left and limit the outlet cross section of the aperture of the axial channel 52. And the chamber 50, the pressurized fluid can also flow along the hydraulic line 31 into the chamber 20 of the distributor 6. The piston 10 of the distributor 6 cVlends left as well as the piston 60 cylinder 3 and the piston 38 distribute l Zb. When the piston 10 moves toward the outlet section of the axial channel 22, it partially overlaps the locking element 1, which causes an increase in pressure in the chamber 19 of the distributor 6. Due to the elastic effect of the spring 16 abutting on the locking element I, the axial channel 22 in the piston 10 never, when it is not completely closed, and therefore the pressure will never be relieved. The increased pressure in the chamber 19 of the distributor 6 along the hydroline 28 is transmitted to the chamber 67 of the distributor 36. When the clutch pedal 65 is pressed simultaneously with the direct movement of the OOP 60 of the cylinder 3 of the clutch, the piston 38 moves the locking element 2 to the left (see drawing, and the pressurized fluid flows from chamber 67 to chamber k3, and from there along channel 72 to chamber 61, acting on piston 60 in addition to the pressure created in chamber 62 by the main clutch cylinder 6 and providing servo amplification. The steering wheel 1 works as follows: When the steering wheel 58 is rotated, the rotational movement by means of the gear 59 turns into a straight-line movement of the rod 95 of the piston 57, causing it to move to the left or right side.- If, for example, the piston 57 is moved to the left (see drawing), the flow area of HYDROLINE 90 increases, while the flow area of hydroline 29 decreases. Therefore, the pressure in the chamber 84 drops and, accordingly, the pressure in the chamber 88 of the cylinder 1 drops. At the same time, when the piston 57 moves to the left, the valve 33 restricts the cross-section of the hydroline 91 and increases the cross-section of the hydroline 29 due to which the pressure in the chamber 85, and hence in the chamber 89 connected to chamber 85 by hydroline 87 is enlarged. The increased pressure in chamber 89 acts out of piston 92, displacing it to the left, while UIITQK 93 is displaced p p (hitch hinges Sne are shown). The valve 33 can be activated simultaneously with the valve Zb operation, since the closure element And never completely closes the axial channel 22 in the piston 10 due to the spring 16 acting on it, and therefore there will always be liquid under pressure in the hydroline 29 if the pump is running . When the piston 57 moves to the right according to the drawing provided by turning the steering wheel 58 in the opposite direction, a pressure differential is created on the piston 92 of the cylinder 1, which causes: the piston 92 moves in the opposite direction, and therefore the piston rod 93 of the piston 92 will also move in the opposite direction. The operation of the distributor 35 cylinder 2 brake is as follows. When the brake pedal 5b is pressed, the piston 55 of the cylinder 2 of the brake moves to the left and the pressure increases. In the branch 76 of the pipeline and in the hydraulic line 30 connected to the compression chamber 77 of the cylinder 2. The increased pressure of the fluid in the branch 7b is transmitted through brake brake 75 to the brake system 73 the car for braking, as well as through pipeline 7 - p chamber 48 of distributor 35. Liquid under increased pressure of hydroline 30 is supplied to chamber 18 of distributor 5, and its piston 9 begins to move to the right, just like piston 37 edelitel osevyh- channels 35. The cross section 21 and 51 of the pistons 9 and 37 gradually decreases under the influence of the locking elements 13 and, therefore it decreases pressures sectional th
    795
    8, chamber 17 and chamber kj and, consequently, chamber 7 increase, and the output flow decreases as piston 37 abuts against the locking element (I. Further pressing the brake pedal 56 causes further movement of pistons 9 and 37 17 is further increased and transmitted via the hydroline 78 to the chamber 66 of the distributor 35. At the same time, the pressure increases in the branch 76 of the pipeline 7 leading to the distribution chamber 48 of the distributor 35, causing the piston 37 to move to the right. element 1, displaces this element by opening a communication between the chamber 66 of the distributor 35 and its chamber 7 Liquid under pressure flows from the chamber 66 of the distributor 35 into the chamber of this distributor, and from there along channel 70 to the measure 7t, where it increases the force of the cylinders 2 brakes, which affects the brake pedal 56.
    When the brake cylinder 2 is working, the pressure fluid is constantly supplied to the distributors 33 and 3B through the distributor 5, since the axial channel 21 in the piston 9 is not completely closed by the locking element 13, due to the fact that it is elastically mounted and the spring 15 acts on it for example, cylinders 2 brakes and 3 clutches are simultaneously working, the ratio of fluid pressures in hydrolines 78 and 28 corresponds to the forces with which the corresponding pedals are pressed, although the absolute value of these pressures depends on which s pedal is pressed with great force. If neither the clutch pedal B5 nor the brake pedal 5b is pressed, only the valve 33 of the cylinder 1 of the steering wheel 8 works
    control, the pressurized fluid is supplied from the pump k to all t three valves 33, 35 and 3B, but is used only by valve 33 because it is stopped by the locking element 1 of the distributor 35 and by the locking element 2 distribute l .36, since they abut against the projections 98 and 99 formula of the invention
    an actuator comprising three actuating cylinders communicated to the pump through a switchgear, and pressure and drain lines, so that, in order to simplify the design and increase reliability, the switchgear contains two similar distributors, each which are made in the form of a cylindrical body with a two-stage spring-loaded piston located in it, dividing the body into two chamber and having axial and transverse channels, and spring-loaded locking elements for interaction with the axial channel of the piston, while the first chamber of one distributor communicates with pressure hydraulic line, with one of the actuating cylinders and through the axial and transverse channels with the first chamber of the second distributor, which is in. turn communicated with the second actuator cylinder
    and through the channels in the piston - with the third executive cylinder, with the second chamber of the first distributor communicating with the first executive cylinder, and the second chamber of the second distributor - with the second executive cylinder.
    Sources of information taken into account during the examination 1. USSR Author's Certificate No., cl. F 15 B 11/20, 1962.
    权利要求:
    Claims (1)
    [1]
    Claim
    A hydraulic actuator containing three actuating cylinders in communication with the pump through the switchgear, and pressure and drain lines, with the aim that, in order to simplify the design and increase reliability, the switchgear contains two similar distributors, each of which is made in the form of a cylindrical body with a two-stage spring-loaded piston located in it, dividing the body into two chambers and having axial and transverse channels, and a spring-loaded locking element for interaction I with the axial channel of the piston, the first chamber of the distributor communicates with the pressure line, with one of the actuating cylinders and through an axial and transverse channels - to the first chamber of the second spread 35 la, which in. in turn, it is connected with the second actuator cylinder and, through channels in the piston, with the third actuator cylinder, the second chamber of the first distributor communicating with the first actuator cylinder, and the second chamber of the second distributor with the second actuator cylinder. ·
    类似技术:
    公开号 | 公开日 | 专利标题
    SU959640A3|1982-09-15|Hydraulic actuator
    SU725937A1|1980-04-05|Volumetric hydraulic drive of vehicle steering gear
    US3532027A|1970-10-06|Hydraulic boost pressure control device
    US3733966A|1973-05-22|Hydraulic power brake booster
    US4441319A|1984-04-10|Brake booster
    US3833081A|1974-09-03|Fluid power steering machine
    US4467700A|1984-08-28|Hydraulic boost mechanism
    US5179835A|1993-01-19|Brake valve for use in load sensing hydraulic system
    US4203631A|1980-05-20|Hydraulic servo-assisted braking system for motor vehicles
    US3714869A|1973-02-06|Hydraulic power brake unit
    GB1449099A|1976-09-08|Vehicle having hydraulic control apparatus for a transmission -controlled brake
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    US3768871A|1973-10-30|Vehicle hydraulic brake system
    US4732002A|1988-03-22|Servo-assisted master cylinder assemblies
    US4073543A|1978-02-14|Switching device for the indirect alteration of the mechanical brake pedal transmission
    US4463562A|1984-08-07|Booster assisted hydraulic master cylinders for vehicle braking systems
    US4087972A|1978-05-09|Brake booster with spring type ratio changer
    SU1228782A3|1986-04-30|Vehicle braking system
    US3446021A|1969-05-27|Power steering unit with poppet directional control valves
    US3183670A|1965-05-18|Power brake means
    US3358786A|1967-12-19|Steering device for a track-laying vehicle
    US3310944A|1967-03-28|Master cylinder
    US4007665A|1977-02-15|Brake booster with improved pedal feel characteristics
    US4214448A|1980-07-29|Hydraulic brake booster
    US3490231A|1970-01-20|Power brake for automotive vehicle
    同族专利:
    公开号 | 公开日
    US4130990A|1978-12-26|
    DK145289C|1983-03-14|
    IE45312B1|1982-07-28|
    SE432005B|1984-03-12|
    FR2359296A1|1978-02-17|
    SE7708375L|1978-01-21|
    BE856831A|1977-10-31|
    DE2732135A1|1978-01-26|
    NL7708031A|1978-01-24|
    IE45312L|1978-01-20|
    ES461465A1|1978-05-16|
    IT1070618B|1985-04-02|
    FR2359296B1|1981-02-13|
    LU77797A1|1977-10-25|
    GB1560966A|1980-02-13|
    JPS5334073A|1978-03-30|
    DE2732135C3|1980-02-14|
    DK145289B|1982-10-25|
    DE2732135B2|1979-06-13|
    DK316477A|1978-01-21|
    CH619184A5|1980-09-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3199286A|1962-05-16|1965-08-10|Gar Wood Ind Inc|Hydrostatic drive|
    GB1332126A|1969-12-18|1973-10-03|Massey Ferguson Services Nv|Apparatus for controlling auxiliary hydraulic services in tractors or towing vehicles|
    JPS5635761B2|1973-05-21|1981-08-19|
    JPS5529285B2|1973-06-13|1980-08-02|DE2749602A1|1977-11-05|1979-05-10|Bosch Gmbh Robert|CENTRAL CONTROL|
    DE2827339A1|1978-06-22|1980-01-10|Bosch Gmbh Robert|CONTROL DEVICE FOR HYDRAULIC POWER TRANSMISSION, ESPECIALLY FOR TRACTOR HYDRAULICS|
    DE2836816C2|1978-08-23|1986-03-06|Alfred Teves Gmbh, 6000 Frankfurt|Valve device|
    IT1119968B|1979-12-11|1986-03-19|Fiat Ricerche|HYDRAULIC SYSTEM FOR A VEHICLE EQUIPPED WITH CONTROLS SERVO ASSISTED BY THE BRAKE AND STEERING|
    US4313454A|1979-12-12|1982-02-02|Midland-Ross Corporation|Hydraulic brake booster pressure limiter|
    DE3127476C2|1981-07-11|1990-09-20|Alfred Teves Gmbh, 6000 Frankfurt, De|
    US5960628A|1995-03-09|1999-10-05|Valeo Electrical Systems, Inc.|Hydraulically powered fan and power steering in vehicle|
    US5535845A|1995-03-09|1996-07-16|Itt Automotive Electrical Systems, Inc.|Automotive hydraulic system and method|
    US6021641A|1995-03-09|2000-02-08|Buschur; Jeffrey J.|Hydraulically powered fan system for vehicles|
    US5881630A|1995-03-09|1999-03-16|Itt Automotive Electrical Systems, Inc.|Apparatus and method of controlling fluid flow between a plurality of vehicle components|
    US5586871A|1995-06-07|1996-12-24|Itt Automotive Electrical Systems, Inc.|Electric motor driven fan with water baffle|
    US5685697A|1995-08-02|1997-11-11|Itt Automotive Electrical Systems, Inc.|Combined check valve and pressure sensor|
    US5778693A|1996-12-20|1998-07-14|Itt Automotive Electrical Systems, Inc.|Automotive hydraulic engine cooling system with thermostatic control by hydraulic actuation|
    US5946911A|1997-01-07|1999-09-07|Valeo Electrical Systems, Inc.|Fluid control system for powering vehicle accessories|
    US6227221B1|2000-10-04|2001-05-08|Geoffrey W. Schmitz|Single-fluid apparatus for supplying vehicle power and lubrication fluid requirements and a system and method for fluid distribution and delivery|
    US6629411B2|2001-05-09|2003-10-07|Valeo Electrical Systems, Inc.|Dual displacement motor control|
    US7610927B2|2005-12-12|2009-11-03|Schmitz Geoffrey W|Apparatus, system and method for monitoring fluid flows and/or filter conditions and/or distributing a single fluid|
    CN102288146B|2011-05-10|2012-09-19|吉林大学|Hydraulic system for three-degree-of-freedom vehicle wheel clearance detecting table|
    CN112455225B|2020-12-04|2021-09-28|安徽江淮汽车集团股份有限公司|Hydraulic control gas valve and automobile brake control system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT6881076A|IT1070618B|1976-07-20|1976-07-20|HYDRAULIC BRAKING SYSTEM WITHOUT ACCUMULATORS FOR THE SUPPLY OF MULTIPLE INDEPENDENT SERVICES|
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