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    • 51. 发明申请
    • THROTTLE LINKAGE STRUCTURE AND METHOD FOR ITS ASSEMBLY AND DISASSEMBLY
    • 节流连杆结构及其组装和拆卸方法
    • WO1982001404A1
    • 1982-04-29
    • PCT/US1980001338
    • 1980-10-09
    • CATERPILLAR TRACTOR COKOHLER RAMON C
    • CATERPILLAR TRACTOR CO
    • F16C01/10
    • F02D11/04
    • A flexible cable (24a) connected at one end to a throttle lever (not shown) is displaceable in a telescoping manner relative to a protective sheath (22) and is pivotally connected at its second end to a connecting lever (28, 28'). The connecting lever (28, 28') and a portion of the flexible cable (24a) reside within a housing (12) which is attachable to a mounting member (14). The connecting lever (28, 28') has splines which are circumferentially engageable with a splined governor shaft (16, 16') which protrudes from the side of the member (14) and extends into the housing (12) through an opening (12a). A cover (32) is attachable to the housing (12) in closely spaced axial relationship with the connecting lever (28, 28') so as to prevent its disengagement from the governor shaft (16, 16'). The connecting lever (28, 28') extends into the opening (12a) to insure access to the connecting lever (28, 28') when it is disengaged from the shaft (16, 16'). The flexible cable (24a) has two extreme displacement limits (E, F) which correspond to two extreme rotative limits (E, F) for the shaft (16, 16'). Method and apparatus are provided for maintaining the calibration and correspondence between the cable's displacement limits (E, F) and the shaft's rotative limits (E, F) when the connecting lever (28, 28') is disassembled and reassembled with the governor shaft (16, 16').
    • 在一端连接到节流杆(未示出)的柔性电缆(24a)可相对于保护护套(22)以可伸缩的方式移动,并且在其第二端处可枢转地连接到连接杆(28,28') 。 连接杆(28,28')和柔性电缆(24a)的一部分位于可附接到安装构件(14)的壳体(12)内。 所述连接杆(28,28')具有花键,所述花键可与从所述构件(14)侧突出并通过开口(12a)延伸到所述壳体(12)中的花​​键调节器轴(16,16')周向接合 )。 一个盖子(32)可以与连接杆(28,28')紧密隔开的轴向关系连接到壳体(12)上,以防止它与调速器轴(16,16')分离。 连接杆(28,28')延伸到开口(12a)中,以确保在连接杆(28,28')从轴(16,16')脱离时进入连接杆(28,28')。 柔性电缆(24a)具有对应于轴(16,16')的两个极限旋转极限(E,F)的两个极限位移极限(E,F)。 提供了方法和装置,用于当连接杆(28,28')被拆卸并与调速器轴重新组装时,保持电缆的位移极限(E,F)和轴的旋转极限(E,F)之间的校准和对应关系 16,16')。
    • 52. 发明申请
    • CONTROL SYSTEM FOR PILOT OPERATED VALVE
    • 引导阀操作控制系统
    • WO1982001402A1
    • 1982-04-29
    • PCT/US1980001339
    • 1980-10-09
    • CATERPILLAR TRACTOR COMCMILLAN WILLIAM D
    • CATERPILLAR TRACTOR CO
    • F15B13/042
    • F15B13/0402
    • Earthmoving vehicles commonly employ hydraulic systems (12) to control raising and lowering the operating implements. Hydraulic systems (12) of this type normally include a pilot control valve (34) having a spool (64) shiftable in response to a shifting force resulting from selectively directing pilot pressure thereto. Problems are encountered when hydraulic systems (12) are used to perform additional functions by shifting the spool (64) to positions requiring additional spool (64) travel. This additional spool (64) travel requires a considerable increase in shifting force, which results in a considerable reduction in the pilot pressure range available for raise and lower modulation. To eliminate this problem, a control system (14) for a pilot operated valve (34) is provided which includes an apparatus (50) for shifting the control valve spool (64) the additional travel distance by changing the magnitude of the shifting force acting thereon without changing the magnitude of the pilot pressure normally reserved for implement raise and lower modulation.
    • 土方工程车辆通常采用液压系统(12)来控制升降操作工具。 这种类型的液压系统(12)通常包括先导控制阀(34),该先导控制阀(34)具有可根据从其选择性地引导先导压力产生的换档力而移位的阀芯(64)。 当液压系统(12)用于通过将滑阀(64)移动到需要附加滑阀(64)行程的位置来执行附加功能时遇到问题。 这种额外的滑阀(64)行程需要相当大的换档力的增加,这导致可用于升高和较低调制的先导压力范围的显着降低。 为了消除这个问题,提供了一种用于先导式操作阀(34)的控制系统(14),其包括用于通过改变作用的换档力的大小来移动控制阀阀芯(64)的附加行程距离的装置(50) 而不改变通常保留用于实现升高和较低调制的先导压力的大小。
    • 57. 发明申请
    • VALVE SYSTEM
    • 阀门系统
    • WO1981003689A1
    • 1981-12-24
    • PCT/US1980000766
    • 1980-06-16
    • CATERPILLAR TRACTOR COMELOCIK KEARLEY R
    • CATERPILLAR TRACTOR CO
    • F16K31/12
    • F15B13/0422
    • A fluid power control system (17) having an improved control valve (20) providing reduced regulated pressure fluid selectively from a high pressure pump supply (P) or the fluid motor (10) under conditions wherein the pump supply has failed to supply the desired pressurized fluid. The system utilizes a control valve (20) having a spool (29) provided with first transfer passage (41) and second transfer passage (42). The first transfer passage is adjustably throttled as a result of movement of the spool relative to an adjacent inlet port (37) and the second transfer passage (42) is adjustably throttled by movement of the spool relative to an adjacent inlet port (38). Inlet port (37) is connected to the high pressure fluid supply (P) and inlet port (38) is connected to the head end (13) of the cylinder (11) of the fluid motor through a check valve (44). Valve (20) provides selective pressure regulated fluid through an outlet port (36) thereof either from the pressurized fluid supply (P) when that apparatus is functioning or from the fluid motor in the event of a failure of the fluid supply. In each case, the valve provides the fluid at a desired operating pressure. The pressure regulated fluid may be used to operate a pilot valve (22) controlling a main valve (14) for adjustably positioning the piston (12) of the fluid motor.
    • 一种流体动力控制系统(17),其具有改进的控制阀(20),所述改进的控制阀(20)在泵供给未能提供期望的条件的条件下从高压泵供应(P)或流体马达(10)选择性地提供减小的调节压力流体 加压流体。 该系统利用具有设置有第一输送通道(41)和第二输送通道(42)的阀芯(29)的控制阀(20)。 第一传送通道由于阀芯相对于相邻入口(37)的移动而可调节地节流,并且第二传送通道(42)通过阀芯相对于相邻入口端口(38)的运动可调节地节流。 入口(37)连接到高压流体供应(P),入口(38)通过止回阀(44)连接到流体马达的气缸(11)的头端(13)。 当该装置工作时,阀​​(20)通过其出口(36)提供选择性的压力调节流体,或者在流体供应失败的情况下通过流体马达提供选择性压力调节流体。 在每种情况下,阀将流体提供在期望的操作压力。 压力调节流体可用于操作控制主阀(14)的先导阀(22),用于可调节地定位流体马达的活塞(12)。
    • 59. 发明申请
    • RESERVOIR FILLING APPARATUS
    • 储存装置
    • WO1981003309A1
    • 1981-11-26
    • PCT/US1980000635
    • 1980-05-23
    • CATERPILLAR TRACTOR COSTINSON R
    • CATERPILLAR TRACTOR CO
    • B60T11/26
    • B60T13/16B60T11/26B60T17/18
    • A hydraulic circuit (10) has a fluid supply source (12) to a work element, such as a control valve (14) for a work implement, connected by a first fluid pathway (18). A second work element (16), such as a master cylinder reservoir of a brake system, has a fluid level (36) which is desirably maintained against leakage in the system to prevent problems in using the brake system. The master cylinder reservoir (16) is associated with the hydraulic circuit (10) by apparatus (38, 42) which initiate pressure conditions in fluid pathways (22, 24) positioned in fluid communication with the master cylinder reservoir (16) to maintain the desired fluid level. The pressure conditions create a pressure differential which initiates or induces a fluid flow from the hydraulic circuit (10) to the master cylinder reservoir (16) to maintain the reservoir fluid level and substantially prevent undesirable braking characteristics which can result from an improper fluid level.
    • 液压回路(10)具有到工作元件(例如用于工作装置的控制阀)的流体供应源(12),其通过第一流体通道(18)连接。 诸如制动系统的主缸储存器的第二工作元件(16)具有期望地保持在系统中以防止在使用制动系统中的问题的液位(36)。 主缸储存器(16)通过装置(38,42)与液压回路(10)相关联,该装置启动位于与主缸储存器(16)流体连通的流体路径(22,24)中的压力条件,以保持 所需液位。 压力条件产生压力差,其启动或引起从液压回路(10)到主缸储存器(16)的流体流动,以维持储液器液位,并且基本上防止可能由不适当的液位导致的不利的制动特性。
    • 60. 发明申请
    • FAILSAFE WHEEL SLIP CONTROL SYSTEM AND METHOD OF OPERATING SAME
    • FAILSAFE车轮滑动控制系统及其操作方法
    • WO1981003152A1
    • 1981-11-12
    • PCT/US1980000539
    • 1980-05-07
    • CATERPILLAR TRACTOR COMILLER RPHELPS W
    • CATERPILLAR TRACTOR CO
    • B60T08/10
    • B60T8/175B60T8/4809B60T8/885B60T2270/416
    • A slip control system for vehicles having spaced apart drive wheels (200, 202) driven by an input shaft (204) through a differential unit (206) including means (220) for calculating wheel slip according to the ratio of wheel speeds, means (220, 230, 232) for entering a slip control mode wherein a braking force is applied to the slipping wheel and incrementally varied on a periodic review basis according to recalculated slip values. If slip increases or holds steady, the brake force is incrementally increased. As slip becomes less, the brake force is incrementally reduced, the particular increments of force reduction being selected in accordance with successive measurements of slip. A drive shaft signal (226) is compared to the high wheel speed signal to identify a wheel speed transducer failure.
    • 一种用于车辆的滑动控制系统,其具有通过差速单元(206)由输入轴(204)驱动的间隔开的驱动轮(200,202),包括用于根据车轮速度的比率计算车轮打滑的装置(220) 220,230,232),用于进入滑动控制模式,其中制动力被施加到滑动轮并且根据重新计算的滑移值在周期性审查的基础上逐渐变化。 如果滑移增加或保持稳定,则制动力逐渐增加。 随着滑差减小,制动力逐渐减小,根据滑差的连续测量来选择力减小的特定增量。 将驱动轴信号(226)与高速轮信号进行比较,以识别轮速传感器故障。