65results about How to "Reliable lifting operation" patented technology

A collapsible hydraulically operated ambulance cot having a support frame, a wheeled base, a support mechanism disposed therebetween, and a lift system for hydraulically moving the upper frame relative to the lower frame is disclosed. The lift system permits a single attendant to raise the cot from a lowered position to a raised position, and an infinite number of positions therebetween, and to raise the wheeled base relative to the support frame to situate the cot onto an elevated surface such as the transport deck of an ambulance. A manual override is also provided to conserve battery power and as a back-up in no-power situations. It is to be appreciated that the above described manual override mode may be used when raising or lowering the cot without power assist, dropping the undercarriage when unloading from a vehicle, and lifting the undercarriage when loading into a vehicle. A charging system for recharging a battery of an electro-hydraulically powered lift ambulance cot with an electrical system of an emergency vehicle is also disclosed.

A collapsible hydraulically operated ambulance cot having a support frame, a wheeled base, a support mechanism disposed therebetween, and a lift system for hydraulically moving the upper frame relative to the lower frame is disclosed. The lift system permits a single attendant to raise the cot from a lowered position to a raised position, and an infinite number of positions therebetween, and to raise the wheeled base relative to the support frame to situate the cot onto an elevated surface such as the transport deck of an ambulance. A manual override is also provided to conserve battery power and as a back-up in no-power situations. It is to be appreciated that the above described manual override mode may be used when raising or lowering the cot without power assist, dropping the undercarriage when unloading from a vehicle, and lifting the undercarriage when loading into a vehicle. A charging system for recharging a battery of an electro-hydraulically powered lift ambulance cot with an electrical system of an emergency vehicle is also disclosed.

The present invention provides an image forming apparatus, comprising: a recording device that prints on a recording medium; a conveying unit that is arranged opposite to the recording device and arranged below the recording device to convey the recording medium; and a lifting device, Lifting the conveying unit; wherein, the lifting device includes an eccentric cam whose rotation axis is eccentric, the conveying unit has an abutting surface abutting on the peripheral surface of the eccentric cam, and is rotated by the eccentric cam And be lifted. Therefore, in the image apparatus, the conveying unit can be raised and lowered smoothly without generating an overload.

The invention relates to a transfer car for a spent fuel storage tank. The transfer car comprises a frame (6), a transverse moving deck (5), wheels (7), a storage tank fixing seat (2), a transverse driving mechanism, walking mechanisms and a linear bearing (30), and the wheels (7) are mounted below the frame (6) and are used for supporting the frame (6). The transfer car is characterized in that the transverse moving deck (5) is supported on an upper flat plate of the frame (6) through the linear bearing (30); the walking mechanisms are mounted on the wheels (7) and drive the wheels (7) to rotate; and the transverse driving mechanism is mounted on the frame (6) and drives the transverse moving deck (5) to move forwards and backwards. The transfer car for the spent fuel storage tank, which is provided by the invention, can be used for the transfer and the accurate positioning of the spent fuel storage tank in a pebble bed high-temperature gas-cooled reactor spent fuel storage system, so that the spent fuel storage tank is transferred to a target location and is subjected to a reliable lifting operation.

The invention discloses a three-cable-group tower crane which comprises a bottom frame, wherein a left tail frame and a right tail frame are hinged at the rear end of the bottom frame; a left rope disc and a right rope disc are mounted on the left tail frame and the right tail frame respectively, a power device is arranged at the rear part of the bottom frame, a winch is arranged in the middle of the bottom frame, and double-drum devices are arranged on the left and right sides of the front part of the bottom frame; the two double-drum devices are same in structure, each two-drum device comprises a double-drum main beam and a double-drum auxiliary beam which are mounted on the bottom frame at an interval in a left-right manner, two drums are mounted between each double-drum main beam and each double-drum auxiliary beam in parallel at an interval in a front-rear manner, and the at least one drum is driven by a hydraulic motor speed reduction device; a drag lever is connected to the front end of the bottom frame, and traveling wheels are downwards arranged on the left side and right side in the middle of the bottom frame respectively. According to the tower crane, a tower material can be lifted, a pole body can be lifted and adjusted, all power for lifting the tower material can be subjected to centralized control, the information exchange among lifting operators can be reduced, and the operation is convenient; meanwhile, the lifting operation is stable, the impact resistance is good, the safety is high, and the transfer operation is convenient.

The invention belongs to the technical field of high altitude building construction equipment and discloses a multifunctional self-climbing type hoisting extensible working platform. The multifunctional self-climbing type hoisting extensible working platform comprises a working platform body, an upper supporting frame, a lower supporting frame, locking mechanisms, a lifting mechanism and a hosting mechanism. The upper supporting frame is arranged above the lower supporting frame. The working platform body is fixed to the upper portion of the upper supporting frame. The upper supporting frame and the lower supporting frame are connected through the lifting mechanism. The multiple locking mechanisms are arranged on the upper supporting frame and the lower supporting frame respectively. Each locking mechanism is composed of a locking body and a horizontally arranged locking telescopic mechanism, wherein one end of the locking telescopic mechanism is hinged to the upper supporting frame or the lower supporting frame; the other end of the locking telescopic mechanism is hinged to the locking body. Transverse moving tracks are arranged on the upper supporting frame and the lower supporting frame. The locking bodies are arranged inside the transverse moving tracks and can move transversely in the transverse moving tracks. The inner ends of the locking bodies are locking faces. The hoisting mechanism is fixed to the upper supporting frame or the lower supporting frame.

The invention belongs to the technical field of curtain wall detection, and discloses a building curtain wall engineering detection device, which comprises a pressure box, an electrifying device, a shunting air pipe, a lower connecting air pipe and two traction ropes, wherein a base is fixedly mounted in the middle of the bottom of an inner cavity of the pressure box, and a lifting cylinder and a spring are fixedly mounted in the middle and on the periphery of the top of the base respectively. The lifting cylinder, the lifting type water spraying device, the air injection body and other structures are arranged to work in a matched mode to achieve the purposes of high working efficiency and high integration degree, a four-way pipe structure is arranged in the air injection body, an electromagnetic valve controlled through stepless speed regulation is matched, and gas can be conveyed to a needed place according to needs; the three-property detection works by virtue of initial wind power, and the three-property detection works by virtue of the set of equipment, so that the overall working efficiency is greatly improved, the occupied area of the traditional equipment is also reduced, and the intensification degree is high.

The invention discloses a lifting appliance for specially lifting cylindrical materials and a crane thereof. The lifting appliance comprises a lifting appliance beam, a driving device and a pluralityof lifting appliance components, wherein the driving device is arranged on the lifting appliance beam, and the lifting appliance component is arranged on the driving device; the driving device comprises two parallel cross beams, two cross beam support parts which are perpendicular to the cross beams and a driving mechanism which is used for driving the cross beams to move; and the driving mechanism adopts a slider-crank mechanism. According to the lifting appliance, an oil cylinder or a motor reducing gear is used as motive power; the slider-crank mechanism is used for driving the lifting appliance to open and close; a sliding block in a crank block is designed in the form of a beam as required, and a plurality of lifting appliance bodies can be arranged on the beam, so that materials withvarious lengths can be lifted; and clamping blocks on the lifting appliance bodies are designed in the form of an arc, and the arc is designed according to the maximum diameter of the lifted materials and is installed on a fixture, so that all materials of which the diameter is less than the diameter of the arc of the clamping blocks can be lifted.

The invention discloses auxiliary equipment for maintenance and installation of electric power equipment for electric power engineering and belongs to the technical field of the auxiliary equipment for maintenance and installation of electric power equipment. The auxiliary equipment comprises a base, wherein a placing and moving switching mechanism is arranged in the base, a top seat is fixedly arranged at the top of the base, a lifting device is fixedly arranged at the top of the top seat, and an overhaul bearing box is fixedly arranged on the right side of the lifting device. The auxiliary equipment is advantaged in that the lifting device is arranged, the occupied space is small, use cost is low, moreover, an anti-falling control mechanism is matched, when the lifting device is damaged,a middle mounting base and a right side mounting base fall down, personal injury caused by rapid fall is avoided, safety is greatly improved, during normal lifting when the rotating speed of the rotating rod is measured to be a standard speed value through cooperation of a rotating speed measuring instrument and a reflective iron patch, the driven friction block cannot interfere with the drivingfriction block, and smooth lifting operation is guaranteed.

The invention relates to the technical field of solar battery piece welding, specifically to a solar battery piece conveying mechanism. The solar battery piece conveying mechanism comprises a movable platform and adsorption pipes, wherein a vertical lifting mechanism is arranged between the movable platform and the adsorption pipes; the vertical lifting mechanism comprises a sliding bracket and a fixed bracket; a second guiding rail formed longitudinally in a horizontal direction and sliding supporting bases glidingly connected with the second guiding rail are arranged on the upper end plane of the sliding bracket; the sliding supporting bases slide along the second guiding rail; a sliding part is arranged at the upper end of each sliding supporting base; wedge-shaped blocks are arranged on the lower end plane of the fixed bracket; an inclined surface which is inclined in a vertical direction is arranged on the lower end plane of each wedge-shaped block; and the sliding parts are fixed on the sliding supporting bases, and the upper ends of the sliding parts are glidingly connected to the inclined surfaces of the corresponding wedge-shaped blocks. The solar battery piece conveying mechanism is simple in structure, convenient to use, capable of achieving stable and rapid battery piece operating, high in battery piece conveying efficiency, and capable of greatly improving the production efficiency of the battery piece, so that the solar battery piece conveying mechanism has an extremely high popularization value.

The invention relates to a telescopic spent fuel storage tank hoisting guide device which comprises a positioning annular plate (1), a top flange (2), an outer guide rib (5), an inner guide rib (7), a top reinforcing ring (3), a middle reinforcing ring (6) and a bottom reinforcing ring (9); the hoisting guide device also comprises a guide wheel assembly (8); the inner guide rib (7) is arranged inside the outer guide rib (5); and the guide wheel assembly (8) is arranged on the inner guide rib (7) and between the inner guide rib (7) and the outer guide rib (5). The telescopic spent fuel storage tank hoisting guide device can be used for hoisting guide and precise positioning of a spent fuel storage tank in a pebble-bed high temperature gas cooled reactor spent fuel storage system, so that the spent fuel storage tank can be hoisted into a shielding transferring container.

The invention discloses a switch with cable constraint protection for the network technology, and the switch comprises a switch shell, wherein the top of the switch shell is provided with a dust removal and heat dissipation fan box and an immersion type cooling box, and the front surface of the switch shell is provided with a wire bunching groove. Iron wire harness control grooves are formed in the top and the bottom of the front face of the switch shell, intercepting rods are installed on the surfaces, close to each other, of movable magnetic attraction blocks, the surfaces of the intercepting rods are attached to the surfaces of wire harness grooves, and magnet attraction blocks are connected to the front face of the lower wire harness control groove in an attraction mode; the front surface of the switch housing is provided with a staggered heat dissipation structure, and the bottom surface of the switch housing is provided with two groups of symmetrically arranged anti-reverse electric push rods. By arranging the wire harness control groove and the dust removal and heat dissipation fan box, dust removal treatment can be carried out on the insertion position of the cable and the switch so as to enhance the connection effect of the cable joint and the switch, and the wire harness control groove and the dust removal and heat dissipation fan box are matched with each other to realize cable constraint.

The invention discloses a graphite electrode lifting device and a method thereof. The graphite electrode lifting device comprises a base; a rotating base is welded at the top of the base; guide rods welded at the top of the base are arranged onthe two sides of the rotating base; onesame guide plate slidingly sleeves the two guide rods; a graphite electrode is fixedly mounted on one side of the bottom of the guide plate; onesame support plate is welded at the top ends of the two guide rods; rotating grooves are formed in the two sides of the top of the rotating base; lead screws are rotationally mounted in the rotating grooves; the top ends of the lead screws are rotationally connected to the support plate; the guide plate is installed on the lead screws in threaded and sleeving manners; and a motor is arranged above the support plate. The graphite electrode lifting device is reasonable in design, high in practicability andsimple in structure and facilitates upward lifting of the guideplate and graphite electrodes, and can lift up one side of the top of the guide plate in the lifting process, so that the guide plate is uniformly stressed, and the graphite electrodes can be stablylifted.

The invention provides a printing and dyeing mechanism elevating device of a flat screen printing machine that can quickly respond to changes in the load of the printing and dyeing mechanism. It is characterized in that it includes a lifting mechanism part for lifting and lowering the printing and dyeing mechanism and its driving source, and a power auxiliary mechanism for assisting the driving force of the driving source for raising the printing and dyeing mechanism; the power auxiliary mechanism is composed of a cylinder with the following mechanism: Mechanism composition: a cylinder, a piston rod, and two air chambers inside the cylinder that are divided by the piston area. The air supply mechanism makes the two air chambers generate a pressure difference and adjusts the pressure adjustment mechanism for the pressure difference; The pressing force of the piston rod generated by the pressure difference acts on the lifting mechanism to generate auxiliary power.

The invention relates to the technical field of intelligent machining, in particular to intelligent machining equipment for an automobile air conditioner compressor front cover shaft hole, which comprises a machining table, a drilling device and a clamping device, the table top of the machining table is provided with a front cover placing groove matched with a front cover, the drilling device is arranged above the machining table, and the clamping device is arranged at the front cover placing groove; the device further comprises a lifting device, a detection adjusting device and a translation device. The detection adjusting device comprises a driving box, a detection mechanism and a pressing mechanism; the driving box is fixedly mounted at the working end of the translation device; the multiple detection mechanisms are distributed on the driving box at equal intervals with the driving box as the axis. According to the equipment, the horizontal plane of the front cover can be automatically kept perpendicular to the axis of the main shaft, and the coaxiality and the machining precision are improved.

The invention discloses an electromagnetic hoisting system for a wide and thick steel plate, which relates to a structure improvement of an electromagnetic hoisting system for a wide and thick steel plate, and is accurate and stable in running. The electromagnetic hoisting system comprises a main control unit, a transformer, a rectifier and a contactor, and is structurally characterized in that the rectifier and the contactor are respectively connected with the main control unit, and the rectifier is connected with a power supply through the transformer.

The invention discloses a lifting operation platform used for architectural decoration construction. The lifting operation platform comprises a fixed top frame, a butt joint clamping frame, a fixed bottom plate, a first side plate and a second side plate. The butt joint clamping frame is movably installed above the fixed top frame. The butt joint clamping frame and the fixed top frame are connected in a butt joint manner and fixed through two sets of hydraulic rods. A first triangular plate is fixedly installed at the middle position of the outer surface of the lower end of the butt joint clamping frame. A second triangular plate is fixedly installed at the middle position of the outer surface of the upper end of the fixed top frame. The second triangular plate and the first triangular plate are connected in a butt joint manner and fixed through a rotating shaft. Fixed sleeve columns are fixedly installed on the outer surfaces of the two sides of the butt joint clamping frame correspondingly. A lifting rod is movably installed inside the upper portion of each hydraulic rod. By means of the lifting operation platform used for architectural decoration construction, the lifting operation platform has an inclining assistance structure, stability of the lifting operation platform is improved, fixation operation of the lifting operation platform can be firmer, the space occupied whenthe lifting operation platform is stored is reduced, and use is convenient.

The invention discloses lifting equipment which comprises a power device, a bracket, nut guide devices, a material loading device and lead screws and further comprises guide pillars. The guide pillars are perpendicularly arranged on the ground, and the tops of the guide pillars are connected with the bracket. The nut guide devices are arranged on the guide pillars in a sleeved manner and provided with first guide mechanisms and second guide mechanisms, wherein the first guide mechanisms are perpendicular to the second guide mechanisms. The first guide mechanisms are parallel to the horizontal plane and are in sliding connection with the outer side walls, close to the material loading device, of the guide pillars. The second guide mechanisms are perpendicular to the horizontal plane and are in sliding connection with the outer side walls, away from the material loading device, of the guide pillars. According to the lifting equipment, the guide pillars and the guide mechanisms matched with the guide pillars are adopted, and the problem that the lifting process is unsteady due to bending deformation of the lead screws can be reduced.

The invention relates to an induction type automatic paving machine. The induction type automatic paving machine comprises a lifting arm, a lifting bucket, a lifting assembly, a tipping assembly and apositioning assembly; the lifting assembly and the tipping assembly are all arranged on the lifting arm; the lifting bucket is of an open structure, and the lifting bucket comprises a side plate, a bottom plate and a lifting plate; the lifting bucket is fixed to the lifting arm through the lifting assembly; and the positioning assembly comprises a GPS position finder and a distance monitor. According to the induction type automatic paving machine, the defects that riprap is uneven, local missing is happened, local stacking is high, supplement riprap is need to be carried out repeatedly and the construction cost is increased due to the fact that existing riprap equipment is prone to being affected by human or environmental factors are overcome. The induction type automatic paving machine is simple in structure, flexible in operation, stable in lifting operation, can avoid the occurrence of lifting bucket deviation and tipping, is conducive to accurate riprap positioning, improving theriprap accuracy, improving the qualified rate of riprap section forming of a dam body, reducing the construction cost, and improving the construction quality and efficiency.

The invention discloses a patient sit-up assist device for medical nursing. The patient sit-up assist device includes a base; a supporting column is arranged on the top center of the base; a top plateis welded onto the top of the supporting column; a motor is arranged on the top of the top plate; the motor is drivingly connected to a winding shaft through a rotation shaft; the winding shaft passes through clamping pulleys of the top plate and is hinged to hanging rings through a steel rope; a heater and an elastic flexible plate matching the heater are arranged on outer surface walls of the supporting column; a bearing bin is arranged on an upper surface of the base; a telescopic air cylinder is arranged in the bearing bin; the telescopic air cylinder is connected to a seat plate of the bearing bin through a hydraulic telescopic rod; a soft rubber gasket is arranged on one side of the seat plate, and a rotation shaft is arranged on the other side of the seat plate; and an armrest is welded onto one end of the base. The sit-up assist device is simple and reasonable in structure, is safe and stable to use, can effectively improve the use safety of the device, and has high practicability.

The invention discloses a clinic support for the hand and foot surgical department. The clinic support comprises a support body and a crank, connecting screw holes are formed in the left end and the right end of the support body, screw rods are mounted in the connecting screw holes, the lower ends of the screw rods are connected with connecting seats, and pre-buried fixed screw holes are formed inthe connecting seats. Rotary discs are fixed to the tops of the screw rods, a connecting rod is mounted on the outer wall of the crank, and the crank is located at the front end of the middle of thesupport body. A main umbrella-shaped gear is fixed to the inner end of the connecting rod, and the lower end of the main umbrella-shaped gear is connected with a secondary umbrella-shaped gear. A leadscrew is mounted at the lower end of the secondary umbrella-shaped gear, a bearing table is mounted on the outer side of the middle of the lead screw, and sliding blocks are fixed to the left end andthe right end of the bearing table. A stand column is mounted in the middle of each sliding block, and a base is fixed to the bottom end of the support body. The clinic support for the hand and footsurgical department is provided with the screw rods, the rotary discs are rotated, the screw rods can rotate accordingly, then the screw rods carry out vertical displacement, and therefore fixing operation is convenient.

The invention discloses a roller chain suspension strength machining clamp, vacuum coating equipment and shot blasting equipment. The machining clamp comprises a top plate and a base which can move up and down in the vertical direction; a first electromagnet and a first on / off control switch arranged on the top plate; a second electromagnet and a second on / off control switch arranged on the base; a first mold and a second mold which are limited between the top plate and the base and adopt permanent magnets, wherein a roller chain can be fixed between the first mold and the second mold through the cooperation of a first mold cavity and a second mold cavity; and a control unit which is electrically connected with the first on / off control switch and the second on / off control switch and outputs on / off signals to the first on / off control switch and the second on / off control switch correspondingly, wherein the first electromagnet generates magnetism opposite to that of the first mold when the first on / off control switch is powered on, and the second electromagnet generates magnetism identical to that of the second mold when the second on / off control switch is powered on. An inner chain assembly, made of engineering plastic, of the roller chain can be conveniently subjected to comprehensive and sufficient strength machining.

The invention relates to a layout scheme for a pulling system in a cat anchor test of a wooden mold. The layout scheme has the advantages that the tooling part layout is reasonable, an implemented technology is simple and practical, and adopted tooling parts are durable, can be recycled and are high in implementing cost performance. The essence is to change a power transmission mode as an intake point; a conventional manual direct pulling mode is changed into an indirect transmission power mode with a self-locking type manual winch as a carrier, the power output directionality, stability and continuity are effectively controlled, an anchorage device obtains a constant traction more easily to make the running process smooth and steady, and the code requirements on anchorage device putting away and releasing in enterprise standards are met. When the pulling system designed by adopting the layout scheme is adopted to perform the cat anchor test of the wooden mold, not only is labor saved,but also the anchoring device anchorage operation in the test process is as stable as that in a true ship test, and the credibility of cat anchor test results is ensured.

The invention discloses multi-station expandable equipment based on plastic injection mold transportation. The multi-station expandable equipment based on the plastic injection mold transportation includes a transportation bearing frame; four moving wheels with locking function are symmetrically arranged on the bottom side of the transportation bearing frame; a storage battery is fixedly installedin a bottom groove body of the transportation bearing frame; two driving motors are fixed on the frame body extending forward from the top side of the transportation bearing frame by bolts, and the two driving motors are designed as a synchronous drive structure; and a controller is also fixedly arranged on the frame side wall of the transportation bearing frame, and the controller is electrically connected to the driving motors. In the multi-station expandable equipment based on the plastic injection mold transportation, conveying rollers are arranged on middle fixed rotating shafts in the middle position of two telescopic frame bodies, and the upper and lower sides of the telescopic frame body wrap the rolling path of the conveying roller; and the design is beneficial to realize the protection of the conveyed mold through the telescopic frame bodies extending upward on both sides, and prevents the mold from falling from both sides and causing safety hazards and economic losses.

An LED lamp comprises a mounting assembly, a lifting assembly, a radiating assembly, an LED light-emitting assembly and a light rendering assembly; the lifting assembly and the mounting assembly are in sliding connection, the radiating assembly is connected with the lifting assembly, the LED light-emitting assembly is arranged on the radiating assembly, and the mounting assembly comprises a buffer box, a mounting cylinder, a water inlet pipe, a water outlet pipe, a first valve, a water pump and a second valve; the lifting assembly comprises a sliding plug and a lifting rod body; the radiating assembly comprises a radiating base, a plurality of radiating bend rods and a plurality of radiating covers; the LED light-emitting assembly comprises a plurality of LED bulbs; the light rendering assembly comprises a pasting film, an embedding film and a plurality of light rendering particles; the pasting film is pasted on the inner side wall of one radiating cover, and the embedding film is attached to the pasting film; according to the LED lamp, through the mounting assembly and the lifting assembly which are matched, the lifting rod body can stably ascend and descend along the inner side wall of the mounting cylinder, and therefore the LED bulbs can be driven to stably ascend and descend, and safety is higher.

The invention provides a projection device with 5G wireless communication and up-and-down and front-and-back adjustment, belongs to the technical field of projection devices, and aims to solve the problem that after an existing projection device is used, part of people directly sleeve a projection device at the moment, and then the service life of the projection device is shortened. The projection device comprises a fixed top plate; a lifting mechanism is arranged at the bottom of the fixed top plate; and an angle adjusting mechanism is arranged at the bottom of the lifting mechanism, and a front-back adjusting mechanism is arranged at the bottom of the angle adjusting mechanism. After a wind speed sensor senses that wind power disappears, a signal indicating that the wind power disappears is transmitted to a control box, then a lifting motor is started through the control box, so that a projector main body is stored in a protection mechanism for protection, the whole protection process does not need manual operation, so that time and labor are saved, heat of the projection device can be effectively dissipated, and the service life of the projection device is prolonged.

The invention provides a motor lifting device and belongs to the technical field of mechanical lifting. The motor lifting device comprises a first base, a lifting frame, a second base, a drawing mechanism, a drawing rope and a connecting assembly, wherein the first base is arranged on one side of a motor; the bottom of the lifting frame is in detachable connection with the first base, a cross beamis arranged at the top, a pulley block is arranged on the cross beam and can move along the cross beam, and a first locking piece used for locking the pulley block is arranged on the cross beam; thesecond base is arranged on one side of the motor; the drawing mechanism is in detachable connection with the second base; one end of the drawing rope is connected with the drawing mechanism, and the other end is connected with the pulley block; and the connecting assembly is used for connecting the pulley block with the motor. When the motor lifting device works normally, the first base and the second base occupy small space, and normal operation of equipment is not affected; and the lifting frame and the drawing mechanism occupy small space, and lifting operation can be carried out smoothly.

The invention discloses a small metal tight etching machine convenient to adjust height. The small metal tight etching machine is characterized in that a machine body is arranged at the top of a connecting plate, an air cylinder is fixedly connected to the center of the bottom of the connecting plate, and an air rod is slidably connected into the air cylinder; limiting rods are arranged on the left side and the right side of the air cylinder correspondingly, and lifting rods are connected into the limiting rods; the two ends of the limiting rods are fixedly connected with positioning blocks, and the two limiting rods and the bottom of the air cylinder are fixedly connected with a bottom plate. According to the scheme, the air cylinder drives the air rod to ascend or descend so as to drive the connecting plate to assist an etching machine body in ascending or descending, and the limiting rods and the lifting rods located on the two sides of the air cylinder synchronously ascend or descend with the air cylinder, so that stable ascending and descending operation of the etching machine body is ensured, and the problem that the position of a metal etching machine is inconvenient to change according to the height required by a worker due to the fact that the working height of the original metal etching machine structure cannot be adjusted is solved.