53results about How to "Elevation and labor saving" patented technology

A vertical lifting column for lighting vehicle is composed oftwo pneumatic springs, 5 lifting pipes, 3 internal sleeves, 3 pulley sets, 3 steel cables and a manual rocker fixed to the first lifting pipe for driving the lifting up or lowering down of said lifting column.

The invention relates to a rotary folding type hydraulic channeling machine, which comprises a body and a machine frame, wherein the body comprises a motive power head and a rolling mechanism, wherein the rolling mechanism comprises an oil cylinder body, an oil cylinder cover and an oil cylinder bottom plate, a piston and a piston rod are arranged in the oil cylinder body, the body is arranged on a flat plate assembly, a rotating device is arranged in the flat plate assembly, the flat plate assembly comprises a flat plate, the upper part of the flat plate is connected with a transition plate through a rotating shaft, the body is arranged on the transition plate, the transition plate rotates around the rotating shaft in a swinging way, the rotary folding type hydraulic channeling machine is also provided with a swinging position limiting device, the flat plate and the transition plate are provided with a braking mechanism, the flat plate is arranged on a flat plate frame, the machine frame is connected under the flat plate frame, the flat plate slides on the flat plate frame, the flat plate and the flat plate frame are provided with a locking mechanism, the machine frame is an air spring auxiliary support folding machine frame which comprises two opening hinges arranged under the front end of the flat plate frame, the opening hinges are connected with a short support rod, a position limiting strip is arranged under the tail end of the flat plate frame, a long support rod is surrounded by the position limiting strip and the flat plate frame, the long support rod and the short support rod are connected through a connecting shaft, a position limiting plate is arranged on the long support rod, a position limiting groove is arranged in the position limiting plate, a position limiting pin is fixed on the short support rod, and the position limiting pin is matched with the position limiting groove.

The invention discloses a teaching table for vocational education. The teaching table comprises a table body, two groups of telescopic legs are fixedly arranged at the bottom end of the table body, universal wheels are fixedly arranged at the bottom ends of the telescopic legs, and a reinforcing arm is fixedly arranged between the telescopic legs in each group; a supporting plate is fixedly arranged between the two reinforcing arms, and an electric hydraulic cylinder is fixedly arranged at the center of the top end of the supporting plate. According to the teaching table for vocational education, the electric hydraulic cylinder is arranged, so that labor is saved when the table body ascends and descends; the universal wheels are arranged, so that the table body is easy to move, and the teaching table is convenient to use; a placing groove is formed, so that telescopic upright columns and a reel shell are convenient to place, and the height of the telescopic upright columns is adjusted;due to the connection of a connection line, hooks and hanging rings, the reel shell is stable; a projection cloth is unfolded through limiting strips, so that projection and application are easy; a lifting device is adjusted by opening a second drawer, and projection equipment is clamped between a movable baffle and a fixed baffle, so that the teaching table is easy to use for teaching and suitable for being used indoors and outdoors.

The invention discloses a retractable CT (Computerized Tomography) measuring rod and a measuring method thereof. The measuring rod comprises an outer rod body, a middle rod body and an inner rod body;a motor is fixed on a bottom surface at the interior of the outer rod body; a bevel gear I is fixed on an end part of an output shaft of the motor; the bevel gear I is meshed with a bevel gear II; the bevel gear II is fixedly sleeved on a middle end of a rotating shaft; both ends of the rotating shaft are rotatably connected with a bearing seat I; the bearing seat I is fixed on an inner wall of the outer rod body; a bevel gear III is fixed on an end part of the rotating shaft; the bevel gear III is meshed with a bevel gear IV; the bevel gear IV is fixedly sleeved on a bottom end of a lead screw; two ends of the lead screw are respectively and rotatably disposed on a bearing seat II; and the bearing seat II is further fixed on the inner wall of the outer rod body. According to the retractable CT (Computerized Tomography) measuring rod and the measuring method thereof disclosed by the invention, by disposing the lead screw, a lead screw sleeve, a guide rail, a roller, a pulley I, a pulley II, a pothook and a steel wire rope, the problems that the rods are easy to incline and low in retraction efficiency when the conventional CT measuring rods are spliced are solved.

The invention relates to the field of electric power facilities, and particularly relates to a telegraph pole convenient to install. The telegraph pole comprises a bottom pile, a lifting structure, afixing structure, a driving structure, a protection structure and a control structure. Through the arrangement of the lifting structure, the height of the whole telegraph pole can be adjusted, and therefore the telegraph pole can be conveniently installed at the positions with different terrain heights; through the arrangement of the control structure, the lifting structure can be conveniently controlled to ascend and descend, and therefore the height of the telegraph pole is adjusted; through the arrangement of the fixing structure, the whole telegraph pole can be more firmly installed in soil; through the arrangement of the driving structure, when the telegraph pole is installed, the fixing structure can be controlled to move after the telegraph pole is installed in the soil; and throughthe arrangement of the protection structure, the control structure and the fixing structure can be protected, and the situation that the telegraph pole makes contact with the outside and is graduallycorroded is avoided.

The invention discloses an electric rice box hanging from an upper cabinet in the kitchen, comprising a rice box body and a rice box barrel, the rice box body is installed on the kitchen upper cabinet, the rice box barrel is built into the rice box body, An electric rice barrel lifting mechanism fixed on the rice box body is provided, including: a base, fixed on the inner top wall of the rice box body; a motor, mounted on the base; a rotating shaft, connected to the motor The output shaft transmission connection; the sling, one end is wound on the rotating shaft, and the other end is fixed on the rice box barrel. The invention can conveniently lift and lower the rice box barrel, thereby solving the applicability of hanging furniture on the upper cabinet of the family kitchen.

The invention discloses a construction hoist with an underneath type traction machine suitable for a building hoistway. The construction hoist comprises the traction machine, a sky beam, a traction medium, a cage and a counterweight. The sky beam is transversely arranged at the upper end of the building hoistway, the traction machine is arranged at the bottom of the hoistway, and a rewinding wheelis arranged above the traction machine. A first pulley is arranged at the top of the cage; a second pulley and a third pulley are arranged at the upper end of the sky beam at intervals; a fourth pulley is arranged on the counterweight; one end of the traction medium is led out upwards from the traction machine, bypasses the second pulley and the first pulley and then is led upwards and fixed; theother end of the traction medium is led out upwards from the traction machine, bypasses the rewinding wheel and the third pulley and then is led downwards to the fourth pulley, and the traction medium bypasses the fourth pulley and then is led out upwards and fixed; and the hoist has the advantages of being high in safety, convenient to maintain and low in noise.

The invention discloses an electric brush processing wire drawing machine with a laser detection function and relates to the technical field of refrigerating motor production and manufacturing. One side of a rack is provided with a rocker handle and a control panel in sequence. A machine hood is arranged above the rack and is internally provided with an abrasive paper belt which is wound around afirst winding drum, a second winding drum and a third winding drum in sequence. The two ends of the machine hood are provided with waste cleaning mechanisms. Each waste cleaning mechanism is internally provided with a dust collector. The bottom of the machine hood is provided with a laser head connected with a displayer. The top of the machine hood is provided with an audible and visual alarm device. One side of the rack is provided with a cooling mechanism. The cooling mechanism is connected with a cooling liquid tank arranged in the rack through a plastic pipe and a water pump. The head of the cooling mechanism can rotate 180 degrees. The wire drawing machine is easy to operate, greatly improves the wire drawing precision and wire drawing efficiency, is wide in application range, high inpositioning precision and accurate in workbench height adjustment and has convenient and fast cooling and dust collection functions.

The invention relates to a passenger car fuel tank lifting assembly device which comprises a fuel tank, a fuel tank bracket for the fuel tank to be installed, a lifting hanging frame, a pulley, a pull rope and a fuel tank pulling-lifting mechanism for vertically lifting the fuel tank. The fuel tank bracket is detachably connected to a car body framework. The bottom of the lifting hanging frame is connected with the fuel tank bracket. The pulley is installed on the fuel tank bracket and the car body framework above the lifting hanging frame. The fuel tank pulling-lifting mechanism comprises a rotating shaft, a rotating shaft installing seat and a rotating handle for turning the rotating shaft. The rotating shaft is rotatably matched with the rotating shaft installing seat. The rotating handle is detachably installed at the end of the rotating shaft. One end of the pull rope is connected with the top of the lifting hanging frame, and the other end of the pull rope bypasses the pulley and then is connected with the middle of the rotating shaft. The passenger car fuel tank lifting assembly device can eliminate the shortcomings of an existing fuel tank structure and has the advantages of being simple and efficient in assembling operation, low in production cost, attractive, elegant, low in labor intensity and the like.

The invention discloses a safety type triangular wire drawing machine for machining cooling fins and relates to the technical field of cooler producing and machining. A rocking handle and a control panel are sequentially arranged on one side of a rack; a machine cover is arranged above the rack; an abrasive paper belt is arranged in the rack, and is sequentially wound around a first rotating barrel, a second rotating barrel and a third rotating barrel; the two ends of the machine cover are each provided with a crushed material outlet; the top of the machine cover is provided with a detecting mechanism which comprises a temperature sensor, a humidity sensor and a smog sensor; the top of the detecting mechanism is connected with an automatic alarming device; a cleaning mechanism is arranged on one side of the rack; the cleaning mechanism is connected with a water tan in the rack through a plastic pipe and a water pump; and the head portion of the cleaning mechanism can rotate by 180 degrees. The wire drawing machine is easy to operate, the wire drawing precision and the wire drawing efficiency are both greatly improved, the application range is wide, the safety performance is good, the service life is long, and it is guaranteed that wire drawing work is performed at high quality for a long time.

The invention provides a liftable pointing rod assembly, a keyboard and an electronic device. The keyboard and the electronic device both apply the pointing rod assembly. Through a linkage coupling structure of a first connecting rod and a second connecting rod, the second connecting rod drives the first connecting rod to move during movement, and therefore the abutting relation between an abutting part of the first connecting rod and a corresponding part of a pointing rod is changed, so that the pointing rod assembly ascends and descends relative to a base plate. Through the structure above,lifting adjustment of the positions of pointing rods in the keyboard or other electronic devices is achieved.

The invention provides a lifting mechanism of a crane. The lifting mechanism comprises a drive mechanism, a dual-link rolling drum, a steel rope device, a horizontal guide mechanism, a vertical guide mechanism, a balance mechanism and a lifting mechanism; the steel rope device comprises a first steel rope, a second steel rope, a third steel rope and a fourth steel rope; the horizontal guide mechanism comprises at least four horizontal guide pulleys which are arranged symmetrically corresponding to the centerline of the double-link rolling drum; the vertical guide mechanism comprises four vertical guide pulleys; the balance mechanism comprises a large balance arm, two small balance arms and a connecting rod, wherein the small balance arms are arranged symmetrically at the two ends of the large balance arm in a manner of corresponding to the large balance arm; each steel rope extends downwards in the vertical direction after bypassing the corresponding horizontal guide pulley and vertical guide pulley and is then fixedly connected with the lifting mechanism, and when uneven forces are applied on the steel ropes during rolling of the double-link rolling drum, the balance mechanism can swing, and when the forces on the steel ropes are balanced, the balance mechanism stops swinging.

The invention discloses a stirring device for ferrite soft magnetic core production. The stirring device comprises a mounting table, and supporting legs are fixedly connected to the four corners of the bottom of the mounting table correspondingly. The bottom ends of the supporting legs are sleeved with sliding sleeves in a sliding mode. A top chute is formed in the top of the sliding sleeve. A first limiting ring is fixedly connected to the inner wall of the top opening of the top chute. A sliding column is slidably connected into the top chute. An auxiliary supporting spring is arranged between the bottom side of the sliding column and the inner wall of the bottom side of the top chute, a sliding hole is formed in the vertical side of the top chute of one top chute, a side groove is formed in the side, in the top chute, of the sliding column, and a second limiting ring is fixedly connected to the inner wall of the opening of the side groove. By means of the stirring device for ferritesoft magnetic core production, the material stirring efficiency in the ferrite soft magnetic core production process is greatly improved, lifting of the stirring device is more labor-saving, manpoweris saved, the production efficiency is improved, and the use requirements of people in production and life are met.

The invention relates to the technical field of power, and discloses a power transformer outdoor mounting supporting device convenient to use. The power transformer outdoor mounting supporting devicecomprises a base located underground, vertical rods are fixedly installed at both sides of the upper surface of the base, a placing plate sleeves the upper ends of the outer surfaces of the vertical rods, a transformer is fixedly installed on the middle section of the upper surface of the placing plate, a movable cylinder is movably installed on the upper surface of the placing plate, a clamping device connected with the placing plate is fixedly installed at the bottom of the movable cylinder, and an abutting block is inserted into the top of the movable cylinder. By means of the power transformer outdoor mounting supporting device convenient to use, through slant rods, supporting columns, movable blocks and idler wheels installed at the bottom of the placing plate, the transformer is moreconvenient to install and detach, and installation and detaching can be achieved simply by putting the device down; meanwhile, the device is safer to use, through the a motor, a turntable and a movable device installed in an inner cavity of the base, when the device lifts and falls, the force is better saved, and the device is more convenient and safer to use.

The invention discloses a movable triangular wire drawing machine for heat sink processing, and relates to the technical field of heat sink production and processing; one side of the frame is sequentially provided with a crank handle and a control panel; the machine cover is arranged on the machine Above the frame, there is a sandpaper belt inside, and the sandpaper belt goes around the first drum, the second drum and the third drum in turn; both ends of the machine cover are equipped with scrap outlets; The opening below the hood is located directly above the workpiece; the bottom of the frame is provided with a set of pulleys, and the bottom of the hood is provided with a visual sensor connected to an external display; the surfaces of the control panel, hand press plate and workbench are all Coated with a self-luminous layer, the self-luminous layer is made of long afterglow luminescent material; the wire drawing machine of the present invention is easy to operate, the drawing accuracy and drawing efficiency have been greatly improved, the application range is wide, the safety is good, and the handling and maintenance The maintenance is convenient and fast, which ensures that the drawing work can be carried out efficiently and stably for a long time.

The invention provides support assembly equipment of a movable-type hydraulic lifting platform. The support assembly equipment comprises a main body, an embedded block, inserted columns, an anti-slipping part, inner cavities, contact holes, guiding rods, baffles, stress plates, buffering blocks and supporting springs; the anti-slipping part is a rubber material, anti-slipping stripes are arrangedon the anti-slipping part, the bottom of the anti-slipping part is mounted on a bearing part in a pasted mode; and the bottoms of the guiding rods are mounted on the edge-corner position of the top ofthe main body in a welded mode, the tops of the guiding rods are mounted in a moving hole at the edge-corner position of the bearing part in an embedded mode, the baffles are mounted in embedded holes in an embedded mode, clamping grooves are used for inserting the embedded block, so that when the bearing part falls, buffering can be conducted through the rubber materials of the embedded blocks and the inserted columns, thus loud voice or huge wobble cannot be generated when the placed bearing part falls, and when the embedded block is inserted, a guiding action is also conducted on the bearing part.

The invention discloses a working method of a triangular drawing machine applicable to the machining of radiating fins and provided with the monitoring function, and relates to the technical field ofradiator production and machining. The working method comprises the following steps: the corresponding drum speed is set by a worker on a control panel according to the material and size of a workpiece, and a first drum, a second drum and a third drum are driven by a motor to drive a sandpaper strip to run; the height of a workbench is adjusted to an appropriate position when a crank is manually rotated by the worker, or the height of the workbench is electrically adjusted to the appropriate position through the control panel; the drawing work on the workpiece surface is performed when a handpressure plate is pressed by the worker, and the specific work condition of the triangular drawing machine can be monitored in real time through a display; and if the width of the workpiece is greaterthan that of the sandpaper strip, the overall drawing work of the triangular drawing machine can be completed as long as the workbench is pushed and pulled by the worker back and forth through a handle. The working method disclosed by the invention has the advantages that the operation by the worker is simple; both the wiring precision and the wiring efficiency are greatly improved; meanwhile, the safety is high; and the long-time efficient and stable progress of the wiring work is guaranteed.

The invention discloses a working method of a triangular wire-drawing machine with an illumination function for the machining of a stator punching sheet, and relates to the technical field of production and machining of refrigeration motors. An LED lamp arranged at one side of a rack is turned on, a staff sets corresponding speeds of rotating cylinders on a control panel according to the materialand the dimension of a workpiece, a first rotating cylinder, a second rotating cylinder and a third rotating cylinder drive a sand paper band to operate driven by a motor, the staff manually rotates acrank handle or electrically adjusts the height of the workbench to a proper position through the control panel, the staff performs wire drawing operation on the surface of the workpiece through pressing of a hand pressure plate, and after operation for a period, the staff turns on a rotatable cooling mechanism to flush the surface of the workbench and turns on a fan for heat radiation. Accordingto the working method, the operation for the personnel is simple, the wire-drawing precision and the wire-drawing efficiency are greatly improved, safety and reliability are achieved, and convenientcooling and illumination functions are achieved.

The invention relates to a passenger car fuel tank lifting assembly device, which comprises a fuel tank, a fuel tank bracket for installing the fuel tank, a lifting hanger, a pulley, a pulling rope and a fuel tank lifting mechanism for lifting the fuel tank up and down. The fuel tank bracket is detachably connected to the body frame. The bottom of the lift hanger is connected to the fuel tank bracket. The pulley is installed on the body frame above the fuel tank bracket and the lifting hanger. The fuel tank lifting mechanism includes a rotating shaft, a rotating shaft mounting seat and a rotating handle for rotating the rotating shaft; the rotating shaft is in rotation with the rotating shaft mounting seat; and the rotating handle is detachably mounted on the end of the rotating shaft. One end of the pulling rope is connected with the top of the lifting hanger, and the other end is connected with the middle part of the rotating shaft after walking around the pulley. The assembly device can eliminate the deficiencies of the existing fuel tank installation structure, and has the characteristics of simple and efficient assembly operation, low production cost, elegant appearance, low labor intensity and the like.

The invention discloses a quick mounting device for a wet joint suspended formwork bottom plate, which comprises a supporting frame, a pull rope and an electric hoist, the cross section of the supporting frame is of an A-shaped structure, an electric pulley is fixedly arranged at the top of the supporting frame, rollers are arranged at the bottom of the supporting frame, one end of the pull rope is fixedly connected with an output shaft of the electric hoist, and the other end of the pull rope is fixedly connected with the output shaft of the electric hoist. And a hook is arranged at the other end and is used for being hung on a mold hanging bottom plate. The electric hoist is arranged at the bottom of the A-shaped supporting frame, and the end of the electric hoist is hung on the hanging mold bottom plate through the pull rope, so that lifting of the hanging mold can be achieved by operating the electric hoist in a labor-saving mode, and the purposes of saving energy, reducing consumption and improving quality and efficiency are achieved; furthermore, through vertically arranging a distance measuring instrument on the supporting frame, the distance between the hoisting bottom plate and the supporting frame is measured, then the height of the hoisting bottom plate can be visually observed in real time, and the damage that the hoisting height is not in place or after the hoisting height is in place, an electric hoist continues to hoist to burn a motor is avoided.

The invention discloses a semi-automatic lifting device. The semi-automatic lifting device comprises a shell, a first lifting structure, a first driving structure, a first clamping structure, an energy storage structure, a selection switch structure, a second clamping structure, a second lifting structure and a second driving structure, wherein the first lifting structure is arranged in the shell,the first driving structure is matched with the first lifting structure, the first clamping structure is matched with the first lifting structure, the energy storage structure is capable of moving back and forth, the selection switch structure is used for driving the energy storage structure to move back and forth, the second clamping structure is matched with the energy storage structure, the second lifting structure is matched with the second clamping structure and the second driving structure is matched with the second lifting structure. Through cooperative arrangement of the lifting structure, the driving structure, the clamping structure, the energy storage structure and the selection switch structure, a user can drive a lifting rod to ascend and descend in a labor-saving manner, additional driving parts are not needed, the structure is simple, the failure rate is low, and the energy-saving and environment-friendly effects are achieved.

The invention relates to a wall-mounted variable depth underwater launching device for a water tank. The wall-mounted variable depth underwater launching device comprises a support system, a lifting system, a gun barrel, gas tanks, gas pipes, solenoid valve and the like. An experimental model is horizontally launched in the water tank at a certain depth and speed, and the requirements of various underwater launching experiments are met. The lifting system transfers force through a pulley set, so that the system bears balanced force, saves labor and is easy to ascend and descend. According to the wall-mounted variable depth underwater launching device, different apertures of launching gun barrels can be replaced to meet the requirements of experiments of models with different apertures. Thewall-mounted variable depth underwater launching device is good in universality, easy and convenient to operate and safe in use.

The invention discloses a trailer support device with novel structures, comprising a support chassis, an outer barrel, an inner barrel, a transmission mechanism and a self-suction lubricating oil cylinder, wherein the support chassis and the inner barrel are in spherical fit connection; a bearing plate is transversely pre-buried in the outer barrel and can transfer force up and down; the inner wall surface of the inner barrel adopts a differential pressure type rheological surface; the transmission mechanism adopts a lead screw and floating lead screw nuts for bearing; and the self-suction lubricating oil cylinder is arranged in the inner barrel, and the lead screw is arranged in the self-suction lubricating oil cylinder, thereby ensuring lifetime lubrication of the lead screw and the nuts. The trailer support device disclosed by the invention adopts the novel inner and outer barrel structures and the transmission mechanism, so that the material is saved, the self weight is reduced, the lifting efficiency is improved, and thus the aim of achieving greater, faster, better and more economical results is achieved.

The invention discloses a working method of a drawbench with a cooling function for electric brush machining, and relates to the technical field of refrigeration motor production and machining. A worker rotates a crank with hands, or the height of a workbench is electrically adjusted through a control panel to the appropriate position, a laser head connected with a displayer carries out laser ranging to judge the accurate height of the workbench, and the worker presses a hand pressing plate for drawing work of the surface of a workpiece; if the width of the workpiece is larger than that of an abrasive paper belt, the worker pushes and pulls the workbench through a handle, and therefore whole drawing work is completed; after the drawbench works for a period of time, the worker starts a waste removing mechanism to concentrate dust particles in a machine cover, and a rotatable cooling mechanism is started to wash and cool the surface of the workbench. According to the working method, operation of the worker is simple, drawing precision and efficiency are greatly improved, positioning precision is high, height adjustment of the workbench is precise, and the convenient cooling and dust removing functions are achieved.

The invention discloses a labor-saving adjustable ground wire hook mounting mechanism. The labor-saving adjustable ground wire hook mounting mechanism comprises a base; a roller is arranged at the bottom of the base; a support rod perpendicular to the base is fixed above the base; a sleeve capable of moving up and down along the support rod sleeves the support rod; a lifting device is further arranged on the support rod; the lifting device comprises a fixed pulley, a drum and a rope; the fixed pulley is fixed at the top of the support rod; the drum is fixed on the lower part of the support rod; one end of the rope is fixed on the drum; the other end of the rope is fixedly connected with the sleeve after being wound around the fixed pulley; a handle capable of enabling the drum to rotate is arranged at one end of the drum; an upper lantern ring and a lower lantern ring are arranged on the sleeve; the upper lantern ring is fixedly connected with the outer wall of the sleeve, while the lower lantern ring is fixedly connected with the outer wall of the sleeve by use of a connecting rod, and the upper lantern ring is located above the lower lantern ring. Due to the structure, a ground wire hook can be suspended more easily at higher efficiency, and meanwhile, the human input is reduced.

The invention relates to a rotary folding type hydraulic channeling machine, which comprises a body and a machine frame, wherein the body comprises a motive power head and a rolling mechanism, wherein the rolling mechanism comprises an oil cylinder body, an oil cylinder cover and an oil cylinder bottom plate, a piston and a piston rod are arranged in the oil cylinder body, the body is arranged ona flat plate assembly, a rotating device is arranged in the flat plate assembly, the flat plate assembly comprises a flat plate, the upper part of the flat plate is connected with a transition plate through a rotating shaft, the body is arranged on the transition plate, the transition plate rotates around the rotating shaft in a swinging way, the rotary folding type hydraulic channeling machine is also provided with a swinging position limiting device, the flat plate and the transition plate are provided with a braking mechanism, the flat plate is arranged on a flat plate frame, the machine frame is connected under the flat plate frame, the flat plate slides on the flat plate frame, the flat plate and the flat plate frame are provided with a locking mechanism, the machine frame is an air spring auxiliary support folding machine frame which comprises two opening hinges arranged under the front end of the flat plate frame, the opening hinges are connected with a short support rod, a position limiting strip is arranged under the tail end of the flat plate frame, a long support rod is surrounded by the position limiting strip and the flat plate frame, the long support rod and the short support rod are connected through a connecting shaft, a position limiting plate is arranged on the long support rod, a position limiting groove is arranged in the position limiting plate, a positionlimiting pin is fixed on the short support rod, and the position limiting pin is matched with the position limiting groove.

The invention relates to a lifting desk. The lifting desk comprises a desk frame, a desk top arranged above the desk frame and two X-shaped lifting frames arranged on two sides of the desk frame. Each X-shaped lifting frame comprises a first supporting portion and a second supporting portion, a tension spring is arranged between the upper end of the first supporting portion and the upper end of the second supporting portion, the movable end of the tension spring is connected with the first supporting portion, the fixed end of the tension spring is fixed to the desk frame through a distance adjusting device, the distance between the fixed end of the tension spring and the desk frame is adjusted by utilizing the distance adjusting device, and the pull force of the tension spring is matched with a load by changing the connecting pull force stroke length of the tension spring, so that the lifting process of the lifting desk is stable, effort is saved, and user experience is improved.

The invention provides a lifting mechanism of a crane. The lifting mechanism comprises a drive mechanism, a dual-link rolling drum, a steel rope device, a horizontal guide mechanism, a vertical guide mechanism, a balance mechanism and a lifting mechanism; the steel rope device comprises a first steel rope, a second steel rope, a third steel rope and a fourth steel rope; the horizontal guide mechanism comprises at least four horizontal guide pulleys which are arranged symmetrically corresponding to the centerline of the double-link rolling drum; the vertical guide mechanism comprises four vertical guide pulleys; the balance mechanism comprises a large balance arm, two small balance arms and a connecting rod, wherein the small balance arms are arranged symmetrically at the two ends of the large balance arm in a manner of corresponding to the large balance arm; each steel rope extends downwards in the vertical direction after bypassing the corresponding horizontal guide pulley and vertical guide pulley and is then fixedly connected with the lifting mechanism, and when uneven forces are applied on the steel ropes during rolling of the double-link rolling drum, the balance mechanism can swing, and when the forces on the steel ropes are balanced, the balance mechanism stops swinging.

The invention discloses a working method of a triangular drawing machine with a cleaning function and used for stator punching machining, and relates to the technical field of producing and machiningof refrigeration motors. The working method comprises the steps that a worker sets the corresponding rotating drum speed on a control panel according to the workpiece material and size, and a first rotating drum, a second rotating drum and a third rotating drum are driven by a motor to drive a sand paper belt to run; the worker rotates a worktable to the appropriate position by hands, or the height of the worktable is electrically adjusted to the appropriate position through the control panel, the worker draws the surface of a workpiece by pressing a hand pressing plate, and the temperature around the worktable is reduced by means of a fan; and meanwhile, dust and impurities on the surface of the worktable are eliminated, and a rotatable washing mechanism washes the surface of the worktable. The working method is simply operated by the worker, the drawing precision and the drawing efficiency are greatly improved, the safety is good, the working noise is low, and convenient cleaning andcooling functions are achieved.