95results about How to "Increase lifting weight" patented technology

The present invention provides an incremental weight system for use with a weight stack of an exercise machines. As described herein, the incremental weight system enables users to incrementally increase the lifting weight, by adding weights that weigh less then the weight of a weight block. The incremental weight system is integrated onto the top of the weight stack, having a weight selector handle operable connected to a pair of engagement pins. The weight selector handle enables the engagement pins to be extended from and retracted into the assembly housing as the weight selector handle is rotated. Incremental weights are disposed at opposite ends of the weight stack. By rotating the weight selector handle, the engagement pins are extended from the assembly housing and engage the increment weights. The engagement pins engage the incremental weight by being inserted through the incremental weight receiving slots, such that, as the weight stack moves up and down, any selected incremental weights move in unison with the weight stack. If an incremental weight is not engaged by the engagement pin, the incremental weight will remain in position, while the rest of the selected incremental weights move unison with the weight stack.

The present invention discloses a twin-beam viaduct type crane, which is mainly used for directly loading and unloading goods at long distance. The crane consists of two rail main beams, a large car frame, a large car operation mechanism, a small rail car, a lifting mechanism, an operating chamber, and a electronically controlled device, wherein the two rail main beams are arranged in parallel; the large car frame consists of two rail beams; the large car operation mechanism is fixed to the two ends of the large car frame; the small rail car is arranged on the large car frame; the lifting mechanism is fixed to the small rail car; and, the operating chamber and the electronically controlled device are fixed to the large car frame. The rail main beams span over a railway, and extend to a cargo work position. A rail longeron is arranged on the rail beam. Longeron operating mechanisms are respectively arranged on the two ends of the rail longeron. The small rail car is arranged on the rail longeron operating mechanism. The crane achieves the straight communication between the materials of a train and a ship. The middle operation is reduced and the handling speed is improved. The berthing of the chip can be far away from a port. The handling can be realized in the sea. The throughput of the port is increased. The crane is suitable for the handling of heavy materials and largetonnage ships.

The invention discloses a construction method of a multifunctional tower crane used for building construction. The multifunctional tower crane comprises a base, a hanging rack, a balancing arm, an operation room and a cargo boom. The balancing arm and the cargo boom are erected on the two sides of the hanging rack correspondingly in a balanced mode. A water pipe is vertically arranged in the hanging rack. A water pipe is transversely arranged in the cargo boom. A plurality of spray nozzles are uniformly distributed in the water pipe transversely arranged in the cargo boom. A sliding device is arranged on a front boom body of the cargo boom. A lifting hook is arranged below the sliding device. A cable is arranged below the lifting hook. The cable is connected with a concrete stirring box. Monitoring probes are arranged at the tail end of the cargo boom and the lifting hook. By the adoption of the construction method of the multifunctional tower crane used for building construction, a lifting and conveying function is achieved, and poured concrete can be wet and cooled through watering by spraying water mist, or dust removal can be achieved through mist spraying.

The invention discloses an automatic brick setting machine which comprises a portal frame. A slidable lifting mechanism is arranged on the portal frame and comprises a sliding platform and a lifting platform, a plurality of green brick fixtures are arranged below the lifting platform and mounted on a base, a slewing mechanism is arranged between the base and the lifting platform and comprises a slewing bearing and a cylinder, the slewing bearing is lifted by a connecting sleeve below the lifting platform, the cylinder is arranged between the slewing bearing and the base, the base is lifted by the slewing bearing and can be driven by the cylinder to horizontally rotate, and a deceleration buffering device and a rotation limiting device are matched with the slewing bearing. The slewing mechanism is driven by the cylinder, transmission gap is eliminated, rotation precision is improved, and rotation speed and angle are effectively controlled by the deceleration buffering device and the rotation limiting device of the slewing mechanism.

The invention discloses a safety pin interlocking device for a crane, a single cylinder safety pin type telescopic arm and a crane. The safety pin interlocking device for the crane comprises a pin pull device dovetail groove and a mechanical lock which is fixedly connected with the dovetail groove; the motion path of the dovetail groove is perpendicular to an axis of a cylinder pin; meanwhile, the motion path of an upper cylinder pin is intersected with the motion path of the dovetail groove, and the motion path of a lower cylinder pin is intersected with the motion path of the mechanical lock; when the arm pin moves to the unlocking position, an arm pin pulling oil cylinder drives the dovetail groove to lock the upper cylinder pin, and meanwhile, the dovetail groove drives the mechanicallock to lock the lower cylinder pin; and when the cylinder pin moves to the unlocking position, the upper cylinder pin locks the dovetail groove by a cylinder pin body, and meanwhile, the lower cylinder pin locks the mechanical lock by the cylinder pin body, thereby the arm pin is directly and indirectly locked. The single cylinder safety pin type telescopic arm and telescopic arm type crane provided by the invention comprise the safety pin interlocking device.

The invention belongs to the technical field of aluminum alloy profiles and particularly relates to a manufacturing method for producing an aluminum alloy mechanical arm track girder hollow profile through an aluminum alloy replacing rolled steel. The manufacturing method comprises the steps that firstly, the intensity and the capacity of resistance to deformation of a steel cross beam are evaluated; secondly, the aluminum alloy is selected; thirdly, the structure of the aluminum alloy mechanical arm track girder hollow profile is designed; fourthly, the movement track and deformation of the aluminum alloy mechanical arm track girder hollow profile in a stressed state are simulated through a computer; fifthly, a mould of the aluminum alloy mechanical arm track girder hollow profile is manufactured; sixthly, the aluminum alloy mechanical arm track girder hollow profile is extruded and quenched online; seventhly, the aluminum alloy mechanical arm track girder hollow profile is aged; eighthly, the aluminum alloy mechanical arm track girder hollow profile is sampled; ninthly, the aluminum alloy mechanical arm track girder hollow profile is riveted; and tenthly, the aluminum alloy mechanical arm track girder hollow profile is packaged and delivered, and the aluminum replaces the steel to produce the aluminum alloy mechanical arm track girder hollow profile.

The invention discloses a single cylinder synchronous expansion and contraction device with multiple sets of inhaul cables for a lorry-mounted crane. The device comprises a basic arm and a plurality of telescopic arms which are overlapped and sleeved in the basic arm; a telescopic oil cylinder of which the head is fixed on the tail of the basic arm and the barrel is fixed on a first section of the tail of the telescopic arm is arranged in each of the plurality of telescopic arms; the arm body of each telescopic arm is provided with a pulley, a telescopic arm cable, and a fixed plate; a rope row is arranged in each telescopic oil cylinder; and synchronous extending or contraction of multiple sections of the telescopic arms can be realized by the connection relationship of the parts, and the operation characteristics that the conventional arm can be only extended and contracted sequentially are changed to ensure that the multiple sections of the telescopic arm bodies are extended and contracted synchronously along with the extension and contraction of the inbuilt telescopic cylinders, so that the extension and contraction speed of the arm bodies and the efficiency of the lifting operation are improved greatly. The single cylinder synchronous expansion and contraction device with the multiple sets of inhaul cables for the lorry-mounted crane has a compact structure, the mode of winding steel wire ropes is skilful, the space in the arm body is fully utilized, and the problems that the conventional five-section telescopic arm expansion and contraction system for the lorry-mounted crane is implemented by arranging two inbuilt telescopic oil cylinders are solved.

The invention discloses an automatic brick setting machine which comprises a portal frame. A slidable lifting mechanism is arranged on the portal frame and comprises a sliding platform and a lifting platform, the lifting platform is mounted below the sliding platform, a plurality of green brick fixtures are arranged below the lifting platform, a vertical lead screw is arranged on the sliding platform, the lifting platform is lifted up and down by the aid of the lead screw and provided with a plurality of balance cylinders matched with the lead screw, the balance cylinders drive the lifting platform in auxiliary lifting, and the green brick fixtures can horizontally rotate around the axis of the lead screw. The balance cylinders bear most weight, the load of the lifting lead screw is reduced, the service life of the lead screw is prolonged, and power consumption is reduced.

The invention discloses a manufacturing process of a girder of an overhead or gantry crane, a threaded pull rod 7 in a box body 1 of a tensioning device is connected with a connecting seat 6, and the manufacturing process is characterized in that two wedge-shaped grooves are formed on the connecting seat 6, two rope head casting ports 5 with wedge-shaped outer shapes and square cone-shaped inner cavities are mounted in the grooves, two wedge-shaped grooves are formed on a fixed hinge 19 at the other end of a steel wire rope 3, and the rope head casting ports 25 with the wedge-shaped outer shapes and the square cone-shaped inner cavities are mounted in the grooves. The manufacturing process adopts the two groups for tensioning, the two groups are mounted on the same girder, and the ultimate tensioning force is great, thereby being applicable to manufacturing the girders of the cranes with the hoisting capacity of below 400 tons. The manufacturing process has the advantages of easy manufacturing, low cost and convenient construction, and is particularly applicable to manufacturing the gantry cranes with the span of above 60m in ports and the shipbuilding industry. The arch difference of the girder of the crane manufactured by adopting the invention can be controlled within 0-1mm, which is better than the international standard; furthermore, the manufacturing process can increase the cutting area of the girder structure, improve the strength, the static stiffness and the hoisting capacity of the girder, save steel, reduce the cost by 15-20%, be in line with the policies of energy conservation and emission reduction and prolong the service life of equipment.

The invention discloses a counterweight device of a crane and the crane with the counterweight device. The counterweight device of the crane comprises: a counterweight; a first guide rail, which is installed on the main body of the crane in a movable manner, used for supporting the counterweight and guiding the counterweight to move along the first guide rail, and capable of moving in a forward inclining state or in a backward inclining state, wherein in the forward inclining state, the counterweight moves forward along the first guide rail under the action of the gravity of the counterweight, and in the backward inclining state, the counterweight moves backward along the first guide rail under the action of the gravity of the counterweight; and a first drive unit, which is used for driving the first guide rail to move in the forward inclining state or in the backward inclining state. Since the guide rail which is capable of inclining forward and backward, the counterweight can move forward and backward along the first guide rail under the action of the gravity of the counterweight so as to adapt to different working states. In a lifting state, the counterweight moves backward, and maximum lifting weight is increased; and in a zero load state, the counterweight moves forward, and the center distribution of the whole crane is uniform, which enables the stability of the crane to be improved.

Provided is a method for manufacturing or transforming main beams of a crane. An I-shaped steel support and reinforcing ribs are welded between a main beam midspan beam and supporting frames; tensioners are mounted at the top ends of the supporting frames and the tail end of a main beam cantilever through connecting seats, and are tensioned through a tensioning system, so that the camber of the main beam midspan beam meets the standard requirement, and the upwarping degree of the effective cantilever position of the main beam cantilever ranges from 0.9/350 to 1.4/35. According to the method for manufacturing or transforming the main beams of the crane, processing and manufacturing are easy, cost is low, and construction is convenient; the method is suitable for being used for manufacturing or transforming main beams of cranes of any tonnage, and especially suitable for manufacturing and transforming of portal cranes in the port and shipbuilding industry. The camber difference of the two manufactured or transformed main beams of the crane is kept between 0 to 1 mm, the main beams of the crane are always kept at any value within the international range, steel is saved, and cost is reduced by 15% to 20 %; the method conforms to the national energy saving and emission reducing policy, and the service life of the crane is prolonged.

The invention discloses a dolly chain driven bridge cantilever crane with a balancing counterweight. The bridge cantilever crane comprises two end beams and two main beams which form a two-beam cranespan structure, wherein a hand-pulled trolley running device is arranged between the two end beams; inverted U-shaped tracks are arranged on the two main beams; a running dolly is arranged between andconnected with the two tracks; the running dolly is provided with a chain drive unit; the central part of the running dolly is provided with a rotating mechanism; a thrust bearing is connected with the interior of the rotating mechanism; the lower end of a suspender shaft in the rotating mechanism is connected with a cantilever member; one end of a cantilever beam on the cantilever member is connected with a hand-pulled trolley, and the balancing counterweight is hung on the other side of the cantilever beam; the hand-pulled trolley can horizontally move to and fro along the cantilever beam;a hand-pulled chain hoist is hung below the hand-pulled running trolley and capable of hoisting cargos; and the cantilever beam is located below the two main beams and capable of carrying out rotation, and can stretch out of a workshop for operation.

The invention relates to the field of hoisting equipment, in particular to an extensible type hoisting equipment counterweight mechanism. The extensible type hoisting equipment counterweight mechanism comprises an outer extending mechanism, an inner extending mechanism and a driving scissors fork assembly. The driving scissors fork assembly is arranged on a balance arm of hoisting equipment, the outer side of the driving scissors fork assembly is connected with the outer extending mechanism, and the inner side of the driving scissors fork assembly is connected with the inner extending mechanism. A counterweight is arranged at the outer end of the outer extending mechanism. The driving scissors fork assembly is driven to open and close through swinging of a hoisting boom of the hoisting equipment. The driving scissors fork assembly opens and closes to drive the outer extending mechanism to stretch out and draw back. The driving scissors fork assembly drives the inner extending mechanism to open and close. According to the extensible type hoisting equipment counterweight mechanism, the horizontal moving distance of the counterweight is substantially increased by means of the space scaling characteristic of an extensible structure, the balance bending moment of the top of a tower body is effectively reduced, the requirements for stability and static rigidity of a tower crane are met, dynamic performance is more outstanding, materials are saved, power dissipation is reduced, and the hoisting weight of the hoisting equipment is substantially increased.

The invention discloses a novel prefabricated concrete member hoisting point embedded part system, and relates to the technical field of assembly type structures. The system comprises an embedded part, anti-pulling steel bars, anti-splitting steel bars, horizontal U-shaped steel bars, distribution steel bars and the like. The embedded part is made of high-strength steel, grooves are formed in theedge of the embedded part, end plates are arranged at the tail of the embedded part, and the bonding performance between the embedded part and a prefabricated member is improved. The anti-pulling steel bars penetrate through holes in the embedded part and are arranged in the longitudinal direction of the embedded part, and the anti-pulling bearing capacity of the embedded part is improved. The anti-splitting steel bars penetrate through the holes in the embedded part and are perpendicular to the embedded part, and the shear capacity of the embedded part is improved. The horizontal U-shaped steel bars are arranged around the embedded part and perpendicular to the embedded part, and the performance of the embedded part under the oblique tension is improved. The distribution steel bars are arranged around the anti-splitting steel bars and perpendicular to the anti-splitting steel bars, and the integrity between the system and the prefabricated member is improved. The embedded part systemis excellent in stress performance, suitable for various hoisting modes of large prefabricated concrete members and good in engineering application prospect.

The invention discloses a high-attitude hanging basket support convenient to dismount and mount. The high-attitude hanging basket support comprises an underframe and weighting pipes, the two sides of the underframe are respectively connected with a weighting pipe, and a middle area weighting pipe is vertically connected on the middle portion of the underframe. Rectangular supports are arranged at the two ends of the middle area weighting pipe respectively, and a fixed frame is connected on the periphery of each rectangular support. A plurality of balancing weight inserting rods which are perpendicularly downward are evenly mounted on the weighting pipes, are arranged between the fixed frames and the rectangular supports and are connected through locating steel plates. A vertical supporting pipe extending downwards is arranged in the center of the underframe, and a plurality of locating holes are distributed in the two sides of the vertical supporting pipe. The high-attitude hanging basket support has the advantages that the structure of the support can be provided with more balancing weights, can improve the lifting weight of a hanging basket, is beneficial for improving the integral operation efficiency of the hanging basket, and can meet the balancing weight operation needs under different conditions.

The invention relates to a steel tube transporting collecting vehicle for a construction site. The steel tube transporting collecting vehicle for the construction site comprises a vehicle bottom plateand vehicle wheels; a supporting seat is arranged in the centre of the vehicle bottom plate; a first lifting arm is arranged on one side of the upper end of the supporting seat; a second lifting armis arranged on the other side of the upper end of the supporting seat; an adjusting rod is arranged between the first lifting arm and the second lifting arm; lifting ropes of the first lifting arm andthe second lifting arm are respectively connected with a winding drum; and the winding drum is connected with a driving motor. When the steel tube transporting collecting vehicle for the constructionsite is used, the vehicle bottom plate is moved to a suitable position through the vehicle wheels; at the moment, construction equipment is lifted under the actions of the first lifting arm and the second lifting arm, and the distance between the first lifting arm and the second lifting arm is controlled through the adjusting rod, so that the lifting weight of a crane is improved by the two lifting arms; meanwhile, the size of a vehicle body is reduced; and the steel tube transporting collecting vehicle for the construction site is convenient to operate and high in practicability.

The invention provides a turbine lifting device used for ship machining. The turbine lifting device comprises two walking supporting beams, a main beam connected to the upper portions of the walking supporting beams and bases fixed to the lower portions of the walking supporting beams. A sliding rail is arranged at the lower portion of the main beam, and the sliding rail is connected with walkingmechanisms fixed to the upper ends of the walking supporting beams in a sliding manner. Each walking mechanism is provided with a shell body spaced with the main beam, wherein multiple supporting springs making the shell body spaced with the main beam are fixed to the bottom of the inner side of the shell body, multiple lower walking wheels located below the sliding rail are connected to the upperends of the supporting springs, and upper walking wheels are connected to the positions, corresponding to the lower walking wheels, above the sliding rail. By means of the turbine lifting device usedfor ship machining, due to the designed walking mechanisms and wheels, the whole lifting device can be moved flexibly, meanwhile, the two walking supporting beams move along the sliding rail, and therefore the turbine lifting device can adapt to various narrow walking and working environments; the supporting springs are arranged below the lower walking wheels of the walking mechanisms, so that friction between the shell bodies and the main beam is avoided; and due to designed bearing devices, the lifting weight and flexibility of the lifting device are improved.