11results about How to "Improve lifting performance" patented technology

The invention provides an excavator hoisting threshold acquisition method and a hoisting alarm method. The method comprises the following steps: acquiring attitude data of a current attitude of an excavator; according to the posture data and the weight data of the multiple parts of the excavator, the tipping load of the excavator is obtained; according to the posture data, the weight data and oil cylinder parameters of the movable arm oil cylinder, the hydraulic lifting value of the movable arm oil cylinder is obtained; and according to the tipping load and the hydraulic lifting value, the lifting threshold value of the excavator is obtained. According to the method, the lifting threshold value can be obtained by combining the postures of all the parts of the excavator according to the actual application scene, the flexibility of obtaining the lifting threshold value is improved, and the lifting capacity of the excavator is improved.

The present invention relates to the technical field of engineering machinery, and discloses a control method, a controller, a control device and a crane for a crane. The control method comprises: receiving an instruction to change the amplitude of a super-lifting device to a first target angle; limiting the angle of the boom to below a first preset angle; setting the first ratchet and the second ratchet to an unlocked state, so that the first steel wire rope and the second steel wire rope are in a loose rope state; obtaining a first tension value of the first steel wire rope and a second tension value of the second steel wire rope; when the first tension value and the second tension value are both zero, folding the first mast and the second mast until the super-lifting angle formed by the first mast and the second mast is lower than the second preset angle; changing the amplitude of the first mast and the second mast to the first target angle. The present invention can prevent the operator from destroying the balance of the whole machine due to misoperation during the hoisting process, can reduce the loss of structural parts, reduce the failure rate of the crane, and ensure that the operation process of the super-lifting condition is safe and controllable.

The utility model discloses a manual and electric chain hoist which comprises a shell, a five-tooth long shaft and a driving assembly. The five-tooth long shaft is rotationally installed on the shell and lifts a heavy object through rotation of the first side. The driving assembly is installed on the second side of the five-tooth long shaft, and the driving end of the driving assembly extends out of the shell. An actuating piece outside the shell drives the driving end in a manual or electric mode so as to drive the five-tooth long shaft to rotate. The lifting device has the beneficial effects that the driving assembly is driven by the external actuating piece to rotate the five-tooth long shaft, and the driving force arm can be adaptively changed according to the lifting requirement so as to improve the lifting capacity. Meanwhile, manual operation is changed into electric operation under the condition that the operation working condition of the chain hoist is not changed, the working efficiency can be effectively improved, the labor intensity can be effectively relieved, and meanwhile a traditional mechanism can be optimized.

The invention discloses a boom-luffing tower crane and a method for determining the positions of a first fixed pulley and a third fixed pulley. The boom-luffing tower crane comprises: a supporting seat; a balancing arm; a lifting arm; a support rod, the bottom of which is connected to the supporting seat through a first connecting point; a pulling rod; a luffing mechanism, comprising a luffing fixed pulley and a luffing rope arranged at the top of the support rod, the luffing rope is unwound from a luffing winch, and is connected to the lifting arm after passing through the luffing fixed pulley, and the luffing mechanism is used to make the lifting arm luffing and rotating relative to the supporting seat; a lifting mechanism, comprising a lifting winch arranged on the balancing arm, a lifting rope, a first fixed pulley arranged at the top of the support rod, a second fixed pulley located at the bottom of the support rod, a third fixed pulley arranged on the support rod and located between the first fixed pulley and the second fixed pulley, and a fourth fixed pulley arranged at the lifting end, when lifting a heavy object, the lifting rope is unwound from the lifting winch, and is connected to the heavy object after passing through the first fixed pulley, the second fixed pulley, the third fixed pulley and the fourth fixed pulley in sequence.

This invention discloses a foldable superlift device, comprising a superlift boom and superlift supports and a superlift winch at both ends. The superlift boom includes a fixed boom connected to the superlift supports and a folding boom connected to the superlift winch. The folding boom and the fixed boom are connected by a pivot shaft. The length of the superlift boom is adjusted by unfolding and folding. The invention also discloses a crane, a multi-angle tensioning control system, and a method incorporating the aforementioned foldable superlift device. This invention can guide the foldable superlift to be tensioned before lifting operations and, by combining the main boom length and combination with different two-stage unfolding schemes, optimize the relationship between the superlift length, unfolding angle, and boom length, thereby maximizing the improvement of the boom's stress state, increasing boom strength and rigidity, and enhancing product performance.

This invention relates to the field of sculpture transportation protection technology, and particularly to a protective device for urban sculpture transportation, comprising a cage frame and at least two hoops; upper and lower cage frames are respectively installed above and below the load-bearing crossbars on opposite sides of the cage frame, and can move vertically along the vertical columns; push rod devices are installed on the upper and lower sides of the load-bearing crossbars, and the push rod devices drive the upper and lower cage frames to move, wrapping the upper and lower hoops around the sculpture; the upper cage frame is connected to the upper hoops, and the lower cage frame is connected to the lower hoops by ropes. This invention avoids direct contact between external objects and the sculpture through the cage frame structure; the use of an upper and lower double push rod system to apply force simultaneously improves lifting capacity and disperses the pressure of a single structure; effectively solving the protection problem of the last mile of urban sculpture transportation.

The invention discloses a boat bottom for a high-speed boat. The small high-speed boat glides on the sea surface and is shallow in draught, on one hand, lift force is generated by means of collision between the boat body and seawater, on the other hand, the catamaran is adopted, the lift force is increased by means of the ejection effect of air on the boat body and the sea surface, and meanwhile the resistance between the boat body and the seawater can be greatly reduced through air energy. The ship bottoms on the two sides are simplified into thin steel plates and go deep into the sea surface by a certain distance, so that a strong constraint space is formed between the ship bottoms and the sea surface, the ship bottom in the middle is wide, wavy ground-effect wings are distributed on the ship bottom in the middle and can glide on the sea surface, the ship bottom which is sunken upwards is arranged between the ship bottom and the ship bottom in the middle, an air inlet channel is formed, and wavy ground-effect wings are also distributed on the ship bottom in the middle. During high-speed movement, the whole structure is located above the water surface, only a small part of the structure is located near the water surface, the operation resistance is small, and the wave-shaped ground-effect wings distributed in an array mode are adopted, so that the loading capacity of the ship can be effectively improved.

The utility model provides a telescopic arm crawler crane which comprises a main machine, a main arm assembly, a counter weight assembly, a crawler frame module and a lower vehicle, the main arm assembly is fixedly connected to the main machine, the counter weight assembly is connected to the other end, away from the main arm assembly, of the main machine, a first adjusting mechanism is connected between the counter weight assembly and the main machine, and the crawler frame module is connected to the lower vehicle. The first adjusting mechanism can adjust the distance between the balance weight assembly and the main machine, the lower vehicle is connected with the main machine, the track frame module is connected with the lower vehicle, and a second adjusting mechanism is connected between the lower vehicle and the track frame module. And the second adjusting mechanism can adjust the distance between the track frame module and the lower vehicle. The telescopic arm crawler crane disclosed by the utility model has higher practicability, flexibility and economical efficiency, is simple and efficient in the use process, and reduces the cost.

The invention provides a motor lifting system based on a box beam static load test system, comprising: a counterweight steel ingot, a pressure sensor, an automatic screw jack, a gasket group, a reaction frame, a winding observation instrument, a lower support steel frame and a control system; the automatic screw jack comprises: a top plate, a sawtooth screw, a sleeve, a jack main frame, a copper nut, a worm shaft, a lifting handle, a ratchet mechanism, a copper worm wheel, a thrust ball bearing, a radial ball bearing, a chassis, a driving connecting rod and a servo electric cylinder; the control system is electrically connected to the automatic screw jack, the pressure sensor and the winding observation instrument respectively, and the control system is used to control a group of automatic screw jacks to act synchronously; the invention has the advantages that: the reaction frame is supported by the automatic screw jack instead of the hydraulic jack, so that the requirements for recording the static load test force of the dedicated railway ballastless track simply supported box beam can be met, and the invention has the advantages of low cost, simple use, stable and reliable performance, etc.

The invention relates to the technical field of engineering machinery, and discloses a counterweight moving device and an operation machine, and the counterweight moving device comprises a first support, a second support, a counterweight and a driving part. The counter weight can slide on the first support and the second support, and the driving piece is used for driving the counter weight to move in the direction close to or away from the rotary table. The second support can be switched between a folded state and an unfolded state, and in the unfolded state, the second support is flush with the first support. The second support can be rotationally switched between the folded state and the unfolded state relative to the first support, so that when the second support is folded, the length of the whole vehicle is shortened, the road driving requirement is met, and potential safety hazards in the driving process are reduced; when the second support is unfolded, the driving piece can drive the balance weight to slide on the first support and the second support, the distance between the gravity center of the balance weight and the rotation center of the rotary table is adjusted, and therefore under the condition that the weight of the balance weight is not increased, the lifting performance of equipment is greatly improved, and the stability of the whole machine is improved.

The invention provides an aviation turbofan engine outer duct airflow high lift device and a vector control device, and belongs to the technical field of aerospace. The outer duct airflow high lift device of the aviation turbofan engine comprises an outer mounting ring, an inner fixing ring and an airflow high lift assembly. And the two airflow lift augmentation assemblies comprise lift augmentation front edge plates, the two lift augmentation front edge plates are fixedly connected with the opposite faces, in the transverse direction, of the outer mounting ring and the inner fixing ring correspondingly, and one sides of the two lift augmentation front edge plates are rotationally connected with lift augmentation rear edge plates. According to the high-bypass-ratio turbofan engine, the lift augmentation assembly and the direction control surface are additionally arranged on the outer duct of the high-bypass-ratio turbofan engine, airflow distribution and the vector direction in the outer duct are accurately regulated and controlled, collaborative optimization of thrust and lift force of the engine is achieved, and therefore the overall efficiency and fuel economy of the engine are improved.