Abstract: A motor control system for a hoist drive having an electric motor operationally connected to a hoisting member for hoisting a load, the motor control system being adapted to generate a final angular frequency reference (?*s) for control of the electric motor, the motor control system comprising a power limiter means adapted to generate a correction term (?s,cor) for angular frequency reference. The power limiter means comprises an integrating controller means, the power limiter means being adapted to generate the correction term (?s,cor) for angular frequency reference using output signal IP of the integrating controller means, initial data of the integrating controller means including information relating to actual value of the power of the electric motor and a power related limit value of the electric motor.

Abstract: To facilitate the use of a crane, an angle feedback information on a rope angle (?) of the crane is received, the angle feedback information being measured by means of a sensor at or adjacent to a trolley; and the angle feedback information is corrected by compensating an error caused by a speed change, and processed to provide movement instructions or other control information relating to the crane on the basis of real-time corrected angle information.

Abstract: The invention relates to an arrangement for installing cables on outer surfaces of crane structures (1), the arrangement comprising means (9) for routing and fastening cables to said surfaces. These means consist of T profiles (9) fastened at the stem part (10) of the T profile to the outer surface (1) of the crane structure, the upper part (11) of the T profile on top of and transverse to the stem part of the T profile being at a distance from the surface of the crane and substantially parallel to this surface, whereby the T profile together with the surface of the crane provide cable conduits (12) for the cables, which are open from the sides.

Abstract: A hoist combination includes a hoist, a trolley that is arranged to move along a beam provided with side flanges, whereby the trolley includes two trolley flanges arranged on opposite sides of the beam and provided with wheels, by which the trolley moves along the side flanges of the beam; and a securing and adjusting device for securing the hoist to the trolley flanges beneath the beam and for adjusting the mutual distance between the trolley flanges, the securing and adjusting device including supporting slide coupling between the hoist and the trolley flanges and an adjustment bar connected between the trolley flanges, the sliding direction of the adjustment bar and the slide coupling being transverse to the beam.

Abstract: A hoist trolley assembly includes first and second hoist trolleys, electric motors to drive the trolleys and a control system. The control system receives a preliminary speed reference for the trolleys and forms a final speed reference for the first hoist trolley by using initial data including the preliminary speed reference. The control system is adapted to use a hoist trolley coefficient Krb that is calculated by k rb = T A_nom T B_nom · v B_nom v A_nom · m TB + m LB m TA + m LA , wherein TA—nom=the rated torque of the electric motor of the first hoist trolley, TB—nom=the rated torque of the electric motor of the second hoist trolley, vA—nom=nominal speed of the first hoist trolley, vB—nom=nominal speed of the second hoist trolley, mTA=dead weight of the first hoist trolley, mTB=dead weight of the second hoist trolley mLA=load of the first hoist trolley, and mLB=load of the second hoist trolley.

Abstract: A system for determining the horizontal location and skew of a grappling member of a crane includes at least two types of reflectors arranged on the grappling member, the relative locations and shapes of which are known; at least one scanning distance sensor mounted on the crane to measure the distance and direction from the crane to the reflectors; and a data processing device arranged to store in its memory the relative locations and shapes of the reflectors; and to determine the horizontal location and skew of the grappling member on the basis of at least the relative locations and shapes of the reflectors and measured distances and directions from the crane to the reflectors.

Abstract: A method according to the invention of controlling a rotation speed of a motor of a speed-controllable hoist drive comprises receiving a lift speed instruction; forming a final speed instruction by using initial information containing the lift speed instruction; and using the final speed instruction as a speed instruction for the rotation speed of the motor of the speed-controllable hoist drive. The method further comprises monitoring a position derivative of an actual value of a cable force. The initial information for forming the final speed instruction comprises the position derivative of the actual value of the cable force.

Abstract: A system for determining a location of a vehicle in an environment provided with at least two landmarks whose location is known. The system includes at least one scanning distance sensor installed in the vehicle and configured to measure distance and direction from the vehicle to the at least two landmarks, as well as a data processing device configured to store in its memory the location of the at least two landmarks; and determine the location of the vehicle on the basis of at least the location of the at least two landmarks as well as the distance and direction from the vehicle to the at least two landmarks.

Abstract: An arrangement for damping oscillation of a loading member in a crane includes a trolley, a hoisting mechanism, hoisting ropes, and a loading member. The arrangement includes a vertical guide projection arranged in an upper part of the loading member, and a guide part arranged in the trolley and receiving the guide projection. Damping members connected to the guide part are arranged in a separate support frame which is guidable into its place in a dock arranged underneath the trolley and which is lowerable off the dock onto the loading member. The guide part is a floating guide tube structure. The damping members include a plurality of side damping modules connected between a side wall of the guide tube structure and the support frame for substantially damping horizontal movement of the guide tube structure. A support joint is arranged in an upper part of the support frame.

Abstract: A lifting assembly includes a link member defining a pivot axis and a latch axis. The lifting assembly also includes a latch pin and a jaw member. The jaw member is pivotally coupled to the link member about the pivot axis and selectively fixedly coupled to the link member about the latch axis by the latch pin. The jaw member defines a cam surface. Engaging the cam surface with a load rotates a portion of the jaw member into alignment with the latch axis, such that the latch pin may be received by the jaw member and the link member.

Abstract: A system with an apparatus that moves on wheels along a track defined by rails, and comprises two opposite sides carried by two or more wheels. The apparatus comprises detectors, at least one detector in either side of the apparatus in a known spatial connection with a wheel for generating to the control unit a signal that represents a measured lateral distance of a specific part of the wheel from a rail. Signals received from detectors are associated with position data that represents a specific position along the track where the lateral distance of the specific part of the wheel from the rail was measured. Signals received from detectors in spatial connection with wheels in opposite sides of the apparatus are used to generate an indication that represents temporal dimensional compatibility of the apparatus and the track. An effective tool for advanced monitoring interoperability of the apparatus and the track.

Abstract: A flame-proof housing (10) of the protection type ex-d is made from two sheet metal blanks that are bent in a u-shaped fashion. They then are fitted into one another and subsequently welded together by means of a peripheral fillet weld without welding seam preparation. A large opening (28) can be provided on one side of the housing (10), which can be closed with a threaded cover or with a flat cover.

Abstract: A method positions a load and fetches a positioned load or stacks loads with a crane having location measurement arranged thereto. The method includes taking a load to a selected position; detecting the unloading of the load mainly automatically; storing coordinate information of the load position mainly automatically into the memory of the crane or its control; when fetching a load or adding loads to a stack, activating, at a selected first time instant, a positioning switch arranged in the crane and connected to the memory, whereby coordinates of a load or stack most advantageously positioned relative to the movement of the crane are selected, after which the crane begins to move to said coordinates; and then hoisting or lowering the load at the selected coordinates, and at a selected second time instant, deleting the coordinate information associated with the position of the load from the memory.

Abstract: A lifting assembly includes a link member defining a pivot axis and a latch axis. The lifting assembly also includes a latch pin and a jaw member. The jaw member is pivotally coupled to the link member about the pivot axis and selectively fixedly coupled to the link member about the latch axis by the latch pin. The jaw member defines a cam surface. Engaging the cam surface with a load rotates a portion of the jaw member into alignment with the latch axis, such that the latch pin may be received by the jaw member and the link member.

Abstract: A guide-roller arrangement for gantry cranes (1) has two rotatably mounted axial carriers (21) on which the guide rollers are seated. The guide rollers (11, 12) are mounted on journals which are arranged in the carrier plate (15) in a manner eccentric to the axis of rotation (41) of the axial carrier (21). The selected eccentric position of the journal can be fixed in a formfitting manner with the aid of toothing formations (29, 36) on the axial carrier and on the carrier plate.

Abstract: There is provided an apparatus, method, computer program product, and a kit and method for upgrading, an apparatus for moving cargo. A bus for transmission of electrical energy, at least one load connected to the bus, said at least one load configured to transform electrical energy from the bus into movement of a cargo with respect to the apparatus energy transforming means configured to transform energy between electrical energy of the bus and potential energy of a hydraulic accumulator, wherein the apparatus is configured to store electrical energy from the bus as potential energy to the hydraulic accumulator and to supply the potential energy stored in the hydraulic accumulator as electrical energy to the at least one load.

Abstract: A hoist trolley assembly includes first and second hoist trolleys, electric motors to drive the trolleys and a control system. The control system receives a preliminary speed reference for the trolleys and forms a final speed reference for the first hoist trolley by using initial data including the preliminary speed reference. The control system is adapted to use a hoist trolley coefficient Krb that is calculated by k rb = T A_nom T B_nom · v B_nom v A_nom · m TB + m LB m TA + m LA , wherein TA—nom=the rated torque of the electric motor of the first hoist trolley, TB—nom=the rated torque of the electric motor of the second hoist trolley, vA—nom=nominal speed of the first hoist trolley, vB—nom=nominal speed of the second hoist trolley, mTA=dead weight of the first hoist trolley, mTB=dead weight of the second hoist trolley mLA=load of the first hoist trolley, and mLB=load of the second hoist trolley.