Abstract: The present disclosure discloses an operating method of a wind power jib of a crane and a crane, and relates to the field of engineering machinery. The method includes the following steps: rotatably connecting a main boom and a wind power jib; overturning the wind power jib to a first preset position by using a traction means of the crane; contacting a cushioning member with the wind power jib provided at the first preset position; further drawing the wind power jib to overturn to a second preset position; releasing the traction means, such that the wind power jib overturns automatically under the effect of self gravity and a cushioning member until the wind power jib is overturned in position.

Abstract: A winch system for driving an output includes a gear connected to the output, an electric motor connected to the gear, and a hydraulic motor connected to the gear. The electric motor and the hydraulic motor are distribute energy via the gear to the output.

Abstract: A lift crane includes a carbody and movable ground engaging members mounted on the carbody. A rotating bed is rotatably connected to the carbody and includes a counterweight support frame including a rack coupled directly to a lower surface of the rotating bed. A boom is pivotally mounted to the rotating bed. A counterweight unit includes a trolley, the counterweight unit being in a movable relationship with respect to the rotating bed. A counterweight unit movement device is configured to move the counterweight unit toward and away from the boom. Other embodiments include a counterweight support beam movably connected to the rotating bed, the counterweight support beam including another rack coupled to a lower surface of the counterweight support beam. A counterweight support beam movement device is connected between the counterweight support beam and the counterweight support frame.

Abstract: A winch drum tension isolation system includes a winch drum having an outwardly extending flange. The flange includes a plurality of holes spaced along the flange. The winch drum tension isolation system also includes a locking mechanism positioned proximate the winch drum. The locking mechanism includes a locking member engageable with the flange, the locking member movable between a first position, in which the locking member is received in a first one of the plurality of holes to prevent rotation of the winch drum, and a second position, in which the locking member is spaced apart from the flange to permit rotation of the winch drum. The winch drum tension isolation system also includes a safety release mechanism having a release member that is selectively engageable with a second one of the plurality of holes to permit removal of the locking member.

Abstract: A crane includes a jib which is mounted on the crane structure so as to be rotatable about a bearing point, a counterweight arrangement which can be positioned variably in relation to the bearing point, and a hoisting cable which runs out from a hoisting winch and is guided via the jib. A counterweight adjustment device, which is coupled to the counterweight arrangement, includes a lever element mounted rotatably about a pivot point, a hoisting cable guide arranged in the course of the hoisting cable between the hoisting winch and an upper jib section, with a first deflecting pulley arrangement mounted on the jib and a second deflecting pulley arrangement mounted on the lever element, wherein the hoisting cable is guided in an alternating manner via the first and the second deflecting pulley arrangement, and a coupling element acting on the lever element and connected to the counterweight arrangement.

Abstract: Telescopic arm for a crane for lifting loads, which comprises a first tubular segment, a second tubular segment located in the first segment and extractable with respect to the first segment along an extraction axis (X). The telescopic arm comprises a clamping device configured to axially and selectively clamp, along the extraction axis (X), the first segment and the second segment. The clamping device comprises a clamping seating provided in the first segment and a clamping pin associated with the second segment, sliding along a sliding axis (Z) transverse to the extraction axis (X) and able to be selectively inserted in the clamping seating.

Abstract: A mobile working machine comprising: a chassis (5); stabilizer legs (10) connected to the chassis; a hydraulic crane (20) carried by the chassis and comprising a crane boom (25) articulately connected to a rotatable column (22) and a lifting cylinder (26) for pivoting this crane boom; and an electronic control device configured to establish a maximum allowed working pressure for the lifting cylinder while taking into account the contribution to the stability of the mobile working machine against tipping from each stabilizer leg (10) that is in an active supporting position. The electronic control device prevents a manoeuvring of a stabilizer leg away from the active supporting position if the working pressure of the lifting cylinder is higher than a threshold value corresponding to the value of the maximum allowed working pressure for the lifting cylinder that would ensue in case the stabilizer leg is made to leave the active supporting position.

Abstract: A telescoping jib of a mobile crane with telescoping sections that telescope inwards and outwards from a jib base casing, and a guying system for the telescoping jib having at least one cable extending between a guying frame and a fixed point by a guying support and is anchored by guying supports, where each guying support comprises a holding mechanism for the cable. A method for guying a telescoping jib of a mobile crane in which at least one cable is anchored between a guying frame on the telescoping jib consisting of a jib base casing and a plurality of telescoping segments and a fixed point on the telescoping jib, and the at least one cable is guided by means of at least one guying support supported on the jib base casing head or a telescoping segment head of the telescoping jib.

Abstract: A construction machine improves ease of assembly of travelling body weights installed in a truck frame and allows a worker to easily move between one pair of side frames through the travelling body weights. The construction machine includes a lower travelling body of a crane includes a truck frame, a left side frame and a right side frame, and a front weight and a rear weight. The front weight and the rear weight each include a lower weight and an upper weight. An upper surface part of the upper weight extends continuously along a left and right direction, and a moving passage is formed between the one pair of side frames.

Abstract: A roll support assembly for a web material dispenser configured to contain a roll of web material having a first interior end. The roll support assembly includes a roll support mountable into the web material dispenser and including a roll-engaging portion with a peripheral wall engageable into the first interior end of the roll of web material with the roll of web material being rotatable relative to the roll support when engaged therewith and when a pulling force is exerted on the web material; and a rotation brake comprising at least one braking protrusion protruding outwardly from the peripheral wall of the roll-engaging portion and decelerating the rotation of the roll of web material by frictionally engaging at least one of directly and indirectly the roll of web material. The disclosure also concerns a web material roll dispenser with such a roll support assembly.

Abstract: A jib assembly includes a support; a jib attached pivotally to the support for pivotal movement of the jib in relation to the support about a horizontal axis; a first linear hydraulic actuator attached to the support for regulating pivotal movement of the jib and for maintaining the jib in a specific position relative to the support; a lever arm attached unrotatably to the jib; and a draw member attached to the lever arm and to the jib; wherein the first linear hydraulic actuator is attached to the lever arm, and the lever arm is arranged to extend in the direction above the jib.

Abstract: Various tissue dispensers are disclosed. The tissue dispenser can hold a main roll of tissue and a stub roll of tissue. In response to the tissue of the stub roll being exhausted, an advance system of the tissue dispenser can automatically transition the tissue dispenser to dispensing tissue material of the main roll.

Abstract: A construction machine allows a worker to easily move between one pair of side frames through a travelling body weight. The construction machine includes a lower travelling body of a crane includes a truck frame, a left side frame and a right side frame, a front weight and a rear weight, and scaffolding members. Scaffolding upper surface parts of the scaffolding members and upper surface parts of the front weight and the rear weight are disposed in line with each other along a left and right direction, and form a moving passage that allows the worker to move between the left and right side frames.

Abstract: A counterweight device including a base plate having a mounted counterweight, a hydraulic cylinder that raises/lowers the counterweight mounted on the base plate, a detachable frame connecting the base plate and a cylinder rod of the hydraulic cylinder, a first pin pivotably supporting the detachable frame with respect to the cylinder rod, a guide coupling portion guiding a free end side of the detachable frame to the rear end portion side of a turning frame in response to a stretching/shrinking state of the cylinder rod, and coupled to the turning frame below an upper end of the rear end portion, and a rail (guide member) guiding the free end side of the detachable frame in a direction parallel to a stretching/shrinking direction of the cylinder rod. The mounting table and the hydraulic cylinder may be supported by a rear end portion of a machine body frame of a construction machine.

Abstract: A hoist for transferring the ends of power lines between supports at different locations including a pair of hoist mechanisms each having a respective tension line receiving drum and which are simultaneously operable with a single crank arm. Each drum has a respective ratchet mechanism that can be selectively set such that upon pivotable movement of the single crank arm between a first and second positions the ratchet mechanisms (i) simultaneously rotate both the drums in a take up direction for simultaneously winding said tensions lines onto the drums, (ii) simultaneously enable rotation of the drums in a release direction for simultaneously unwinding the tensions lines from the drums, or (iii) rotate one drum in a take-up direction for winding the respective tension line on the one drum while simultaneously enabling rotating the other drum in a release direction for unwinding the tension line from the other drum.

Abstract: A tension balance system for steel wire ropes on a friction hoisting driving end of an ultra-deep well includes a friction wheel, left and right guiding wheels, left and right steel wire ropes, left and right adjustment wheels, left and right rewinding wheels, left and right adjustment oil cylinders, a hydraulic pipeline, a pump station, a pipeline switch group, left and right hoisting containers, balance ropes, and reels. The friction wheel is disposed in the middle, the left and right adjustment wheels and the left and right rewinding wheels are circularly distributed around the friction wheel, the left and right guiding wheels, the left and right adjustment wheels, and left and right rewinding wheels are all symmetrically disposed on two sides of the friction wheel; both a quantity of left steel wire ropes and a quantity of right steel wire ropes are even numbers more than 2.

Abstract: A chain block comprises: a first rotary body in which a first tooth part f is arranged; a second rotary body comprising a second tooth part which opposes to a first tooth part with magnetic attraction force and releasing the magnetic coupling state by sliding toward thrust direction; a clutch pin integrally provided with the second rotary body; a clutch receiving member comprising a plurality of recessed pockets to which the clutch pin enters according to a slide of the second rotary body; wherein the plurality of pockets comprise; a hoisting-side pocket in which a magnetic member is arranged; a lowering-side pocket in which a magnetic member is arranged; and an intermediate pocket which exists between the hoisting-side pocket and the lowering-side pocket and which the clutch pin enters in a state of not being magnetically attracted.

Abstract: A modular powered hoist design comprises: 1) a multifunctional baseplate, which forms a foundation of the powered hoist design and comprises part of a guide system for a lifting media, and 2) an integrated lift/guide assembly, securing a liftwheel therein, that is attachable to the baseplate through attachment features formed within the baseplate. Embodiments allow for different components of a powered hoist to be interchanged in the case of material incompatibility or to provide higher guide performance (such as accommodating different safety factors). Moreover, in manufacturing, embodiments allow for the use of overlapping product parts across different powered hoist product designs, thereby reducing overhead-related costs.

Abstract: The present disclosure discloses an operating method of a wind power jib of a crane and a crane, and relates to the field of engineering machinery. The method includes the following steps: rotatably connecting a main boom and a wind power jib; overturning the wind power jib to a first preset position by using a traction means of the crane; contacting a cushioning member with the wind power jib provided at the first preset position; further drawing the wind power jib to overturn to a second preset position; releasing the traction means, such that the wind power jib overturns automatically under the effect of self gravity and a cushioning member until the wind power jib is overturned in position.

Abstract: A drawworks assembly including a drum including a first end, a second end, and a longitudinal axis, a coupling assembly configured to transmit torque to the drum, and a cradle assembly configured to support the drum, wherein the coupling assembly is releasably coupled to the drum at a first planar engagement interface disposed at the first end of the drum, wherein the cradle assembly is releasably coupled to the drum at a second planar engagement interface disposed at the second end of the drum.