利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

273 条记录 (耗时 0.016 秒)

    Control for electromechanical brake having transistorized timing reset means
    1.
    发明授权
    Control for electromechanical brake having transistorized timing reset means 失效
    具有转换定时复位装置的机电制动控制

    公开(公告)号：US3842329A

    公开(公告)日：1974-10-15

    申请号：US41521473

    申请日：1973-11-12

    申请人： HARNISCHFEGER CORP

    发明人： MIERENDORF R

    IPC分类号： B60T13/74 ,  H01F7/18 ,  H02K7/102 ,  H01H47/04

    CPC分类号： H02K7/1023 ,  H01F7/1805

    摘要： A static brake controller for an electromechanical brake initially supplies direct current voltage from a first bridge rectifier, energized from a power supply transformer, to the brake magnet coil to release the brake and then supplies reduced direct current voltage from second bridge rectifier, energized by a reduced voltage tap on the power supply transformer, to the brake magnet coil to maintain the brake released while preventing coil overheating. The first bridge rectifier has SCR''s in the legs thereof and a relaxation oscillator energizable from the transformer and including a unijunction transistor and an emitter capacitor connected thereto, applies gating pulses to the SCR''s to render them conductive. Oscillator disabling means, including a timing capacitor energizable from the transformer and dischargeable to operate a first transistor to short-circuit the emitter capacitor, are provided to disable the relaxation oscillator a predetermined interval of time after the power supply transformer is energized. A solid state logic reset circuit, including a normally reverse-biased transistor which becomes forwardly biased in response to deenergization of the power supply transformer, is provided to operate a second transistor which short-circuits the timing capacitor to effect reset thereof and to operate said first transistor which shortcircuits the emitter capacitor to disable the relaxation oscillator.

    摘要翻译： 用于机电制动器的静态制动控制器最初将来自第一桥式整流器的直流电压从电源变压器供电到制动器电磁线圈以释放制动器，然后从第二桥式整流器提供降低的直流电压，由 降低电源变压器上的电压抽头，向制动器电磁线圈保持制动释放，同时防止线圈过热。 第一桥式整流器具有SCR的腿部，并且可以从变压器激励的弛豫振荡器并且包括单结晶体管和与其连接的发射极电容器，将选通脉冲施加到SCR以使其导通。 振荡器禁用装置包括可从变压器激励的定时电容器，并且可放电以操作第一晶体管以使发射极电容器短路，以在电源变压器通电之后以预定的时间间隔禁止张弛振荡器。 提供固态逻辑复位电路，其包括响应于电源变压器的断电而向前偏置的正反偏置晶体管，以操作使定时电容器短路以实现其复位的第二晶体管，并操作所述 第一晶体管使发射极电容短路以禁止弛豫振荡器。

    Mobile crane with telescopic boom and jib and method for connecting the latter
    2.
    发明授权
    Mobile crane with telescopic boom and jib and method for connecting the latter 失效

    公开(公告)号：US3831771A

    公开(公告)日：1974-08-27

    申请号：US33337773

    申请日：1973-02-16

    申请人： HARNISCHFEGER CORP

    发明人： WIENCEK D

    IPC分类号： B66C23/693 ,  B66C23/70 ,  B66C23/06

    CPC分类号： B66C23/707 ,  B66C23/702

    摘要： A mobile crane comprises a multisection telescopic boom and an optionally usable multisection telescopic lattice type jib (having a base section and axially movable intermediate and fly sections) which when not in use is telescoped and stored on a support in parallel reverse disposition alongside the boom. Each jib section comprises four hollow tubular longitudinal members (each of rectangular cross-section) arranged in parallel spaced apart relationship with a plurality of angularly disposed tubular cross braces connected between each pair of members to define a jib section of rectangular cross section. Each longitudinal member is rotated on its axis to present opposite inwardly and outwardly facing flat bearing surfaces and also to present two other opposite flat surfaces to which the ends of the cross braces are welded. Bearing means are provided to facilitate relative sliding motion and to transmit thrust forces between adjacent jib sections. The bearing means comprises inwardly facing slide pads mounted at the lower front ends of the base and intermediate sections and outwardly facing slide pads mounted at the upper and lower rear ends of the intermediate and fly sections; each slide pad being mounted on a support secured within the hollow end of a tubular longitudinal member and engaged with an appropriate bearing surface on an adjacent jib section. To unstore the jib and set it up for use, the foot end of the jib is releasably connected by pivot pin means to the point end of the boom and the boom is partially extended to axially move the jib forward clear of its support. At this stage the unextended jib may be swung 180* about the pivot pin means into axial alignment with the boom and rigidly secured thereto by suitable attachment means. Or, the jib may be partially or fully extended prior to being swung 180* by connecting either the jib intermediate section or the jib fly section, respectively, by releasable rear pin means to the boom base section and by then further extending the boom, either partially or fully, respectively. In all cases, prior to swinging the jib, a guy wire jib mast pivotally attached to the boom point and folded back alongside the boom is swung into upright position. The jib is designed so that it can be rigidly connected at an angle to the boom axis and so that the jib fly section can be rigidly connected at an angle to the jib axis.

    Load grab mechanism having separable rotatable grab arms
    3.
    发明授权
    Load grab mechanism having separable rotatable grab arms 失效
    具有可分离的可变格栅的装载机构

    公开(公告)号：US3771666A

    公开(公告)日：1973-11-13

    申请号：US3771666D

    申请日：1972-06-30

    申请人： HARNISCHFEGER CORP

    发明人： FOURNIER O

    IPC分类号： B66C1/30 ,  B66C1/62 ,  B66F9/07 ,  B66C17/06 ,  B66C1/42

    CPC分类号： B66F9/07 ,  B66C1/30 ,  B66C1/62

    摘要： A load grab mechanism for use on a material handling device such as a stacker crane to handle heavy loads having a central opening (such as coils of sheet metal) comprises a support on which a horizontally disposed splined shaft is mounted for rotation by a pair of hydraulic actuators. A pair or grapple arms are mounted on the splined shaft and are slidably movable by another pair of hydraulic actuators to juxtaposed or separated positions. The grapple arms are movable to horizontal or vertical positions by rotation of the splined shaft. A stop block rigidly mounted on the support engages the grapple arms when they are in juxtaposed or partly separated horizontal position to prevent their downward rotation when subjected to a load. In operation, the grapple arms (in either horizontal or vertical position) can engage the ends of the central opening of a horizontally disposed coil. The grapple arms (in horizontal position and juxtaposed) can be inserted into one end of the coil opening. The crane is then operated to move the load to a desired location; whereupon the grapple arms are moved to release the load.

    摘要翻译： 用于诸如堆垛机的材料处理装置上用于处理具有中心开口的重负载（例如钣金的线圈）的负载抓取机构包括支撑件，水平设置的花键轴安装在支架上以通过一对 液压执行器。 一对或抓钩臂安装在花键轴上，并且可由另一对液压致动器可滑动地移动到并列或分开的位置。 抓斗臂通过花键轴的旋转可移动到水平或垂直位置。 刚性地安装在支撑件上的止动块当它们并置或部分分离的水平位置时接合抓斗臂，以防止它们在经受负载时向下旋转。 在操作中，抓斗臂（水平或垂直位置）可以接合水平设置的线圈的中心开口的端部。 抓钩臂（水平位置并列）可插入线圈开口的一端。 然后操作起重机以将负载移动到期望的位置; 然后移动抓斗以释放负载。

    Hoist-testing apparatus and control system therefor
    4.
    发明授权
    Hoist-testing apparatus and control system therefor 失效
    测试装置及其控制系统

    公开(公告)号：US3722267A

    公开(公告)日：1973-03-27

    申请号：US3722267D

    申请日：1971-11-03

    申请人： HARNISCHFEGER CORP

    发明人： GORDON R

    IPC分类号： G01L3/00 ,  G01M99/00

    CPC分类号： G01L3/00 ,  G01M99/00

    摘要： Apparatus for testing the rated load, speed and braking capabilities of a hoist comprises a hydraulically operated test winch which imposes a predetermined load or line pull at a predetermined speed on the hoist line. The hoist line is connected to the test winch cable by a lever and pulley arrangement. A load cell responsive to lever movement and, therefore, the load imposed, provides a visual readout thereof at an operation control station. Load size is remotely adjustable from the control station by a load control rheostat which controls an electric-hydraulic pressure control valve which, in turn, adjusts the pressure relief setting of a pressure relief valve between a hydraulic winch motor and the hydraulic pump for that motor. A load control pressure gauge at the control station is responsive to output pressure of the electric-hydraulic pressure control valve for the pressure relief valve and is calibrated to indicate pounds of line pull or load which the hoist being tested can exert to enable the operator to set the load control rheostat accordingly. Load speed is remotely adjustable from the control station by a speed control rheostat which controls another electric-hydraulic pressure control valve which, in turn, operates a cylinder to adjust the speed setting of a servo-stem speed control device on the pump. A speed control pressure gauge at the control station is responsive to output pressure of the other electric-hydraulic pressure control valve for the speed adjustment cylinder and is calibrated to indicate feet per minute of hoist line speed to enable the operator to set the speed control rheostat accordingly.

    摘要翻译： 用于测试起重机的额定载荷，速度和制动能力的装置包括液压操作的测试绞盘，其在提升线上以预定速度施加预定的负载或线拉。 起重机线通过杠杆和滑轮装置连接到测试绞盘电缆。 响应于杠杆运动并因此施加的负载的测力传感器在操作控制站处提供其可视读出。 负载大小可以通过控制电动液压控制阀的负载控制变阻器从控制站远程调节，电动液压控制阀进而调节液压绞盘马达与该电机的液压泵之间的泄压阀的压力释放设置 。 控制站上的负载控制压力表响应于用于压力释放阀的电动液压压力控制阀的输出压力，并被校准以指示被测试的起重机可以施加的线数或负载的磅数，以使操作者能够 相应地设置负载控制变阻器。 负载速度由控制站通过速度控制变阻器进行远程调节，速度控制变阻器控制另一个电动液压压力控制阀，该电动液压控制阀进而操作气缸，以调节泵上的伺服速度控制装置的速度设定。 控制站的速度控制压力表响应速度调节气缸的另一个电动液压控制阀的输出压力，并被校准以指示提升线速度的每分钟脚数，以使操作者能够设定速度控制变阻器 相应地。

    Self-adjusting power operated brake
    5.
    发明授权
    Self-adjusting power operated brake 失效
    自调节动力制动器

    公开(公告)号：US3710897A

    公开(公告)日：1973-01-16

    申请号：US3710897D

    申请日：1971-06-28

    申请人： HARNISCHFEGER CORP

    发明人： MOODY J

    IPC分类号： F16D49/16 ,  F16D65/52 ,  F16D65/54 ,  F16D51/00 ,  F16D65/38

    CPC分类号： F16D65/52 ,  F16D49/16 ,  F16D65/54

    摘要： A power operated brake of the type having self-adjusting brake shoes which are opened by power means and closed by spring means relative to the wheel being braked. The brake includes means for automatically adjusting the brake shoes to compensate for wear thereof. The self-adjusting means includes a series of shims which automatically move into slack take-up position when sufficient wear occurs in the shoe.

    摘要翻译： 一种具有自动调节制动蹄类型的动力制动器，其由动力装置打开并且相对于被制动的车轮被弹簧装置关闭。 制动器包括用于自动调节制动蹄以补偿其磨损的装置。 自调节装置包括一系列垫片，当在鞋中发生足够的磨损时，该垫片自动地进入松弛的卷取位置。

    Antifriction bearing support means for a crane having an extensible slide or the like
    6.
    发明授权
    Antifriction bearing support means for a crane having an extensible slide or the like 失效
    具有可伸缩滑块或类似物的起重机的支撑轴承支撑手段

    公开(公告)号：US3586194A

    公开(公告)日：1971-06-22

    申请号：US3586194D

    申请日：1969-08-19

    申请人： HARNISCHFEGER CORP

    发明人： DECHANTSRETTER MAX J

    IPC分类号： B66F9/14

    CPC分类号： B66F9/141

    摘要： An improved antifriction bearing support for a load supporting slide of a crane, which slide is extendible on relatively moving members so as to be able to extend the load from the crane into a storage aisle or the like. The improved antifriction bearing support means includes ball races which are so formed that the hardened ball elements contact the opposed races at four points of contact, to thereby provide weight supporting thrust as well as lateral support thrust. An improved drive means is also provided for laterally shifting the relatively moving slide members.