摘要:
A key element for the control of electromotors, especially for cranes and other hoisting equipment. The key element includes a key switch pestle, a permanent magnet attached to the key switch pestle and a Hall sensor. The key switch pestle and permanent magnet are moveable both towards and away from the Hall sensor. As the permanent magnet approaches the Hall sensor, a flux density is sensed which triggers the generation of a control signal. In order to create a key element which can be installed in the smallest possible space, in controls and the like, the electronic circuit which includes a permanent magnet positionable toward the Hall sensor is integrated into the key element housing.
摘要:
A hoist, including: load suspension device, a lifting means for raising and lowering the load suspension device; a traction mechanism connecting the suspension device with the lifting device; and a control device for the lifting device and the load suspension device. The control device is connected with the load suspension device and including a housing, a handle for manipulating the load suspension means, switching members arranged in the housing which are actuable for controlling the lifting device, and switching rockers arranged in the housing so as to be able to actuate the switching members. The switching rockers are each inclined toward the handle and are swivable around and connected to one end of a rocker shaft extending horizontally when the control device is considered as vertically suspended from the traction mechanism. The switching members are located so as to be reachable by a thumb of an operator's hand grasping the handle, while the handle is curved so that an imaginary line continuing from an outer surface of the handle intersects each of the switching rockers near supporting surfaces of the switching rockers. The supporting surface of each of the switching rockers includes a central region located opposite the rocker shaft so as to receive the operator's thumb in a neutral position and two edge regions that adjoin a top and a bottom of the central region at an angle in a direction tranverse to the rocker shafts so as to receive the operator's thumb in a switching position.
摘要:
An operating device for the manual actuation of hoisting equipment, with at least one spring-loaded switch element (2) for each direction of movement of the lifting device arranged in a switch housing (1), wherein each switch element (2) includes a pressure activation mechanism (5), a first electrical micro-key button (4), and at least one additional control or switch element, especially another electrical micro-key button (6), and the pressure activation mechanism (5) is arranged in front of the micro-key button (4) and the additional control or switch element and these can be activated in succession by means of such structure.
摘要:
The invention concerns a drive arrangement of a lifting gear and/or a traveling gear, with a pole-reversible rotary-current motor with windings for at least two different actuating speeds, with a pole switching element connecting the rotary-current motor to a voltage supply for changing between the actuating speeds of the rotary-current motor. In order to create a drive arrangement of a lifting gear and/or a traveling gear with a rotary-current motor, whose switching behavior is optimized in relation to the actuation of the rotary-current motor, it is proposed that a power switching element (3) be hooked up in front of the pole switching element (5), and it can be separated from the voltage supply via the power switching element (3) for the pole switching process of the rotary-current motor (2).
摘要:
A cost-effective ergonomic shaped suspended control panel for remotely controlling machinery, such as hoists or cranes. The suspended control panel has two curved housing portions and a curved circuit card mounted in the interior of the curved housing. Keys are mounted to the front side of the circuit card and switching devices are mounted to the back side of the circuit card. An electric line, supported by a cable, is electronically connected to the circuit card, the keys and the switching devices. The control panel is easily assembled through use of plug sockets for connecting the switching devices to the circuit board. Each plug socket is mounted with spring clamps which extend through the circuit card for wiring.
摘要:
A process and a device for monitoring and/or controlling the speed of rotation of an electric drive having an asynchronous motor equipped with a braking device (11) and connected via a frequency adapter (13) to an alternating current system (12), e.g. three-phase system, to provide safe lifting and lowering of a load. The maximum torque (16) produced by the drive for lifting the load is set to be smaller than a holding torque (17) needed by the braking device (11) to hold the load in a stationary position.
摘要:
A current contact line arrangement includes a plurality of energy and control current contact lines for engagement with current collectors of a movable energy consumer such as a crane, trolley carriage or the like which is not intended to pass beyond a predetermined point and is characterized by the fact that at least one of the energy or control current contact lines (5) is covered by an insulator (9) which is longer than the brake path of the movable energy consumer.