102results about How to "Realize the limit function" patented technology

The invention relates to a scissor type unfolding mechanism which comprises a top short rod assembly, scissor type stage group rod piece units, a bottom supporting rod assembly, a driving unit assembly and an unfolding in-place indicating switch, the unfolding mechanism is connected with an unfolded object through the top short rod assembly, and the multiple stages of scissor type stage group rod piece units are connected through hinge shafts to form a multi-stage unfolding mechanism. The long rods of the multiple stages of unfolding mechanisms are connected in sequence; the bottom supporting rod assembly is connected with the driving unit assembly, the driving unit assembly drives the bottom supporting rod assembly to achieve unfolding and folding of the unfolding mechanism, after the unfolding mechanism is unfolded, a stable triangular structure is formed through the bottom supporting rod assembly, the scissor type stage group rod piece units and the limiting devices, the structural rigidity is improved, and the unfolding mechanism is controlled to be unfolded.

The invention belongs to the technical field of dampers, and particularly discloses a nonlinear bidirectional active anti-impact damper which comprises a cylinder body, a load connecting plate, an elastic supporting piece and a magnetic damping assembly, the load connecting plate is installed at one axial end of the cylinder body in a floating mode through the elastic supporting piece, the load connecting plate is connected with a piston rod, and the end of the piston rod extends into the cylinder body; the magnetic damping assembly comprises a magnet and a coil, one of the magnet and the coil is connected to the end of the piston rod, and the other one is connected into the cylinder body. The damper further comprises a displacement sensor and a controller, the displacement sensor is used for detecting displacement data of the load connecting plate, the controller is connected with the displacement sensor and the coil, and the controller is used for controlling the current of the coil so that the coil can cut magnetic lines of force of the magnet to generate magnetic damping force changing nonlinearly along with displacement. The damper can effectively restrain vibration impact, gentle impact resistance is achieved, and the influence of sudden impact force on the service performance of equipment is reduced.

The invention belongs to the field of assembly, and provides injection molding machine integrated automobile interior buckle full-automatic assembly equipment which comprises a feeding mechanism, a temporary storage mechanism, a mechanical arm and an assembly mechanism which are all mounted on a rack. Wherein the feeding mechanism is used for conveying buckles to be assembled into the temporary storage mechanism; the temporary storage mechanism comprises a temporary storage platform and fasteners, a temporary storage groove used for storing the buckles is formed in the temporary storage platform, and the temporary storage groove can be used for bearing the buckles to be assembled when the temporary storage platform abuts against the feeding mechanism and allowing the manipulator to grab the buckles into the assembling mechanism when the temporary storage platform is away from the feeding mechanism; the fastener is arranged in the temporary storage platform and used for locking the buckle in the temporary storage groove. Compared with the prior art, the device has the advantages that the device can be used from the injection molding stage to the final buckle installation and inspection, manual intervention is not needed, the device is highly integrated and high in automation degree, the assembly efficiency and the qualified rate are effectively improved, and meanwhile the workload of a mechanical arm in the assembly process is reduced.

The utility model relates to the technical field of automobile electric power steering machines, in particular to a detachable rubber sealing cover for a steering machine, which comprises a metal framework and rubber, the rubber is coated outside the metal framework, a plurality of sealing lips are arranged on the periphery of the rubber, and an upward raised upright post is arranged in the center of the top of the rubber. A flange protruding outwards is arranged on the edge of the top of the rubber, and a plurality of protruding points are evenly arranged at the bottom of the rubber. Compared with the prior art, the sealing lip matched with the hole wall of the inner hole of the shell is designed, so that the effective sealing area is enlarged, and the sealing function is ensured; the flange matched with the annular groove of the shell is designed, the limiting and anti-falling functions are achieved, and disassembly and assembly are convenient and fast; the arrangement of the stand column facilitates disassembly and reworking of the sealing cover, and the sealing cover can be repeatedly disassembled, assembled and used. The utility model has the advantages of low cost and wide applicability.

The utility model relates to a safety rope waist fixing suite for coal mining personnel, which comprises a left shoulder strap and a right shoulder strap, the rear side of the left shoulder strap and the rear side of the right shoulder strap are connected in a crossed manner, the front side end parts of the left shoulder strap and the right shoulder strap are respectively provided with a fixing box, the two fixing boxes are detachably connected, and the rear side end parts of the left shoulder strap and the right shoulder strap are respectively connected with a waist fixing belt. The waist fixing belts are connected with the fixing boxes, the lower ends of the fixing boxes are connected with supporting belts A, the tail ends of the rear sides of the left shoulder belt and the right shoulder belt are provided with supporting belts B respectively, the supporting belts A and the supporting belts B are connected with the supporting blocks, the supporting belts A and the supporting belts B on the same side are used for wearing legs, at least one fixing box is provided with a handle, and the handle is provided with a hanging buckle. A safety rope is arranged at the lower end of the hanging buckle, a baffle is rotationally arranged on the hanging buckle, an arc sleeve is arranged on the inner side of the baffle, a spring is arranged in the arc sleeve, and an arc rod is arranged on the corresponding hanging buckle and inserted into the arc sleeve. The garment has the advantages of reasonable structural design, convenience in wearing, safety, reliability and the like.

The utility model discloses an electromagnet which comprises a support body and a cover plate fixedly arranged on one side of the support body. An execution assembly is arranged in the support body, the bottom and the top of the support body are both provided with anti-seismic colloid, the bottom is further provided with a PIN terminal, the PIN terminal is electrically connected with the execution assembly, and the connecting position of the PIN terminal and the execution assembly is wrapped by an insulation connecting bridge. The execution assembly comprises a winding supporting piece, a limiting shaft sleeve, an iron core, a permanent magnet and a coil. The two ends of the limiting shaft sleeve are provided with limiting holes, and sliding limiting of the iron core is achieved through a guide block and a positioning base. The anti-seismic performance, the integration level and the installation convenience of the electromagnet can be improved, meanwhile, the leakproofness and the insulativity of the welding part are ensured, and the electromagnet is suitable for an automobile ABS system.

The utility model discloses a precursor synthesis and concentration device, which belongs to the technical field of precursor concentration, aims at solving the problems that large impurities in a precursor are not easy to filter and clean and the concentration effect of the precursor is influenced in the prior art, and comprises a concentrator and a cover plate fixedly arranged on the top surface of the concentrator, a fixed cylinder is fixed in the middle of the top surface of the cover plate, a liquid inlet pipe is fixed on the outer surface of the fixed cylinder, and a filter cylinder corresponding to the liquid inlet pipe is inserted into the top of the fixed cylinder; through the arrangement of the filter cartridge, the feeding hole, the cartridge cover and other structures, the function of filtering impurities from a precursor is realized, so that the concentration effect of the thickener is improved, the bottom surface of the filter cartridge is conical, the accumulation of impurities at one part of the bottom surface of the filter cartridge is reduced, the filtering efficiency of the filter cartridge is improved, and the limiting mechanism is arranged, so that the concentration effect of the thickener is improved. The function of limiting the cylinder cover is achieved, the stability of the cylinder cover after the filter cylinder is inserted is kept, and the sealing performance after the cylinder cover is closed is improved.

The present invention relates to the field of valve technology, and in particular to a river channel sluice reinforcement device. It includes a positioning frame, the positioning frame is a U-shaped structure with an opening facing downward, and the opposite ends of the two vertical sections of the positioning frame are provided with sliding grooves; it also includes a door panel device, the door panel device is connected in the two sliding grooves, and the door panel device includes a rectangular plate that is slidably connected to the two sliding grooves at the same time. The bottom connection mechanism and the plug-in mechanism used in the present invention cooperate with the positioning frame to limit the moving direction of the rectangular plate at the same time, and increase the overall impact and extrusion resistance of the rectangular plate from multiple directions, strengthen the strength between the rectangular plate and the side wall of the river channel, effectively avoid the deformation of the rectangular plate, and increase the sealing of the sluice during use.

The invention discloses a stainless steel calendering disc shearing device which comprises a box body, a workbench is mounted at the top end of the box body, a disc body is mounted in the middle of the top end of the workbench, a limiting structure is mounted at the bottom end of a mounting block, and a first telescopic rod is mounted at the bottom end of the mounting block. A first telescopic rod is mounted at the bottom end of a mounting block, when a blade cuts the mounting block to ascend and descend, a limiting plate can press the top end of a stainless steel material, anti-skid lines at the bottom end of the limiting plate can enhance friction force of the limiting plate, and the limiting plate can prevent the stainless steel material at the bottom end from deviating; the second telescopic rod can retract into the first telescopic rod, cutting of the blade is not affected, meanwhile, after cutting is finished, due to the fact that the first spring has elasticity, the second telescopic rod can be reset through the elasticity of the first spring, and the limiting function of the stainless steel calendering disc shearing device is achieved.

A wheeled vehicle limiting device belongs to the technical field of industrial peripheral vehicles, including a track carrier, a track carrier is provided on the track carrier, a connecting rod device is provided in the track groove, the connecting rod device includes a movable limiting member and a track connecting plate, one end of the movable limiting member is elastically hingedly connected to the track end, and the other end of the movable limiting member is elastically hingedly connected to the track connecting plate; the movable limiting member can be sunk into a slot, and the track connecting plate moves toward the front wheel under the drive of the movable limiting member, and the rear end of the track connecting plate forms a rear wheel slot with the track. The present invention sets a connecting rod device in the track, and uses movable limiting blocks and track connecting plates to cover the slots above the track positions corresponding to the front and rear wheel slots, respectively, to limit the entire vehicle, and the track connecting plate can automatically return to its original position through a connecting spring.

The invention relates to the technical field of data storage equipment locking, in particular to a hard disk fixing device and a case, and the hard disk fixing device comprises a sliding support, a hard disk support and an elastic piece. The sliding support is used for fixing the hard disk body, the sliding support drives the plug connector of the hard disk body to slide on the hard disk support in the first direction and is used for being connected with the connector of the backboard module in an inserted mode, the hard disk body has a moving space, and therefore the problem that the hard disk body is interfered and inconvenient to install due to tolerance accumulated in manufacturing and assembling is solved. The elastic piece is arranged between the sliding support and the hard disk fixing device and can drive the sliding support to slide in the first direction, so that the hard disk body always has pressing force for pressing the backboard module, and the influence of a gap between the hard disk body and the backboard module on connection of the hard disk body and the backboard module is eliminated. Therefore, the problem of poor signal transmission between the hard disk fixing device and the backboard module is improved.

The application relates to the technical field of mutual inductor winding production, and discloses a mutual inductor winding production processing equipment and a processing method thereof, which comprises a winding device, a rectangular core is arranged above the winding device, a plurality of air pipes are fixedly arranged at the output end of an air pump, a supporting seat is slidably connected to the upper side of the winding device, double-head air cylinders are slidably connected to the inner bottom wall of the supporting seat, supporting rods are fixedly arranged at the output end upper end of the double-head air cylinders, a plurality of sliding cylinders I are fixed to the outer wall of the supporting rods, sliding rods I are slidably arranged at the other ends of the sliding cylinders I, and a motor II is fixed to the inner bottom wall of the winding device. The controller, the air pump and the double-head air cylinders are matched, the gas pushes the plurality of sliding rods I to move and abut against the inner side of the fillet of the rectangular core, so that the problem that the existing technology cannot adapt to the cores with different fillet radii, the equipment has a single application scene and has poor universality is solved.

The utility model relates to the technical field of industrial sensor installation, in particular to a sensor installation structure of industrial equipment, which comprises an installation plate, two installation grooves in bilateral symmetry are arranged on the upper end face of the installation plate, sliding cavities are communicated with the front end parts of the two installation grooves, and limiting blocks capable of sliding up and down are arranged on the sliding cavities. A fixing plate is in sliding fit between the two mounting grooves, the front end of the fixing plate can abut against the rear end of the limiting block, sensors are evenly distributed on the fixing plate, a pull plate is arranged at the front end of the mounting plate, two pull rods which are in bilateral symmetry are fixedly arranged at the rear end of the pull plate, and push springs are connected between the pull rods and the mounting plate; the rear end of the pulling plate is fixedly provided with two inserting blocks which are symmetrical left and right, the inserting blocks are arranged in a trapezoid shape and abut against the limiting blocks, the limiting blocks abut against the fixing plate through vertical sliding of the limiting blocks, and detection, maintenance and disassembly and assembly are convenient.

The utility model discloses a limiting mechanism which comprises a base, a transmission seat, an elastic assembly, a crank assembly and a limiting piece. The base comprises a bearing part for bearing a product; the transmission seat is arranged on the base in a sliding manner and is positioned below the bearing part; the elastic assembly is connected between the base and the transmission seat; the crank assembly is rotationally connected with the transmission seat and the base, and moves along with the transmission seat, so that one end of the crank assembly is close to or far away from the bearing part; the limiting piece is connected with one end of the crank assembly, and the limiting piece synchronously moves along with the end of the crank assembly to be close to or away from the bearing part, so that the product at the bearing part is limited. According to the limiting mechanism, the product limiting function is achieved, the structure of the limiting mechanism is simple, the movement range of the limiting piece and the crank assembly is small, the operation space required by the limiting mechanism is small, and therefore the limiting mechanism can limit the product in a narrow space.

The utility model belongs to heat exchanger shell technical field, concretely relates to a heat exchanger shell sealing element, including heat exchanger shell, heat exchanger shell one side is provided with the tube sheet, the tube sheet is connected with the flange disc through the connecting assembly, the flange disc one side is provided with the pipe box, and is provided with the first installation slot on the flange disc, the first sealing gasket is set up in the first installation slot, the second installation slot is set up on the tube sheet, the second sealing gasket is set up in the second installation slot, the second sealing gasket is integrally formed with the first sealing gasket, a plurality of through -holes that communicate with the first installation slot are arrayed and are set up on the flange disc, and the flange disc one side array is provided with a plurality of first magnetic blocks, and every first magnetic block position corresponds with every through -hole position. The device makes sealing gasket firmly fixed after installation, prevents the displacement of sealing gasket due to factors such as vibration, pressure fluctuation during the operation of heat exchanger, and greatly enhances the reliability of sealing.

The utility model relates to the technical field of cable sleeves, and provides an environment-friendly cable sleeve which comprises a sleeve body. A protective structure is arranged on the outer wall of the sleeve body; a bottom frame is arranged at the bottom end of the protection structure. By arranging the limiting structure, when the bottom frame and the top frame are installed, the bottom outer protruding block and the bottom inner groove at the bottom end of the bottom frame are aligned with the top outer groove and the top inner protruding block at the top end of the other set of top frame respectively to achieve up-and-down assembly. The side outer protruding blocks and the side inner grooves on the left sides of the bottom frame and the top frame of the third set correspond to the side outer grooves and the side inner protruding blocks of the first set respectively to achieve left-right assembly, so that multiple pipelines can be spliced into a whole in the transportation process, the pipelines can be directly placed on the ground conveniently, the sleeves are not prone to sliding off in the transportation process, and the transportation efficiency is improved. The limiting function of the device is realized, and the convenience of the environment-friendly cable sleeve is improved.

The utility model discloses a spring sealing ring in the technical field of sealing rings, which comprises a sealing ring body and a mounting groove, the mounting groove is embedded in the top of the sealing ring body, a plurality of first limiting plates are arranged in the mounting groove and fixedly connected with the mounting groove, and the first limiting plates are fixedly connected with the mounting groove. A groove is formed in the inner wall of the mounting groove, a spring body is arranged in the groove, the spring body is fixedly connected with the groove, a fixing plate is arranged in the groove, the fixing plate is in sliding connection with the groove, a second limiting plate is arranged on one side of the fixing plate, and the second limiting plate is fixedly connected with the fixing plate. Through the arrangement of the mounting groove, the first limiting plate, the groove, the spring body, the fixing plate and the second limiting plate, the limiting function of the spring is achieved, the stability of the spring is improved, the spring cannot be popped out from the interior of the sealing gasket due to elasticity after being mounted, and using is safer.

The invention discloses an unmanned aerial vehicle mounted tower climbing anti-falling device, relates to the field of cable installation and protection, and solves the problems that when an existing unmanned aerial vehicle mounted tower climbing anti-falling device is used, the size of a safety lock catch is relatively fixed, the safety lock catch is difficult to be suitable for fixing cross rods with different widths, and meanwhile, the dismounting and mounting efficiency is relatively low. Comprising an unmanned aerial vehicle body, an anti-falling mechanism, a hanging mechanism, a stabilizing mechanism and a safety rope, the anti-falling mechanism comprises a connecting frame device box and a clamping rod, and the hanging mechanism comprises a mechanical arm, a hook and a fixing frame. The clamping rod is linked to be away from the connecting frame, the clamping force between the fixing frame and the hook is automatically increased through the stabilizing mechanism, the shaking amplitude is reduced, and when the hanging state of the hook to the fixing frame is released, the clamping rod is controlled to be automatically close to the connecting frame, and the clamping and limiting functions on the cross rod are achieved.

This utility model discloses a large-diameter pipe installation and handling device, including a mobile lifting frame for moving the pipe. The mobile lifting frame includes: four columns with rollers at the bottom, a horizontal beam plate fixedly connected to the four columns, a gripping mechanism for gripping the pipe wall, and a lifting mechanism for lifting the pipe. The lifting mechanism includes a lifting plate and a lifting drive mechanism for driving the lifting plate to move up and down. Two or more vertical guide columns are fixedly connected to the beam plate, extending downwards from the bottom of the beam plate. The lifting plate is located below the beam plate and has guide holes that slide with the guide columns. The lifting drive mechanism includes a fixed part and a movable part that moves relative to the fixed part. The lifting plate is fixedly connected to the movable part, and the beam plate is fixedly connected to the fixed part. The lower surface of the lifting plate has double slide rails with the axis in the front-back direction. The double slide rails face each other left and right. This utility model can lift and fix the pipe, achieving a hoisting function, thus enabling the handling of large-diameter pipes in situations where a crane is unavailable.

The utility model discloses a waste water recycling device of a commercial concrete mixing plant, which belongs to the technical field of concrete preparation and comprises a treatment box, a treatment cavity is arranged in the treatment box, the treatment cavity is communicated with a feed port arranged on the treatment box, a waste water grading filtering mechanism is arranged on the treatment box, and a discharge component is arranged at the lower end of the treatment box. The wastewater graded filtering mechanism comprises a mounting frame connected to the treatment box, a stepping motor is connected to the mounting frame, a rotating shaft A is connected to the output end of the stepping motor, a filter screen A is connected to the peripheral side of the rotating shaft A, a belt wheel A is connected to the end, away from the stepping motor, of the rotating shaft A, the belt wheel A is in transmission connection with a belt body, and the belt body is in transmission connection with a belt wheel B. According to the utility model, particles with different sizes in waste water can be filtered in a grading manner, so that the phenomenon that small particles still remain in the waste water in the filtering process is prevented, and the secondary filtering action needs to be further carried out, and the waste water recycling efficiency is improved.

The utility model relates to the technical field of sockets, in particular to a socket, which comprises a base, a plug bush assembly and an upper cover, an installation cavity is arranged on the base, the upper cover is connected with the installation cavity in a buckling way, the plug bush assembly is arranged inside the installation cavity, an abutting part is arranged on the inner wall of the upper cover, and when the upper cover is buckled with the installation cavity, the plug bush assembly is inserted into the abutting part. The socket is provided with a structure for limiting and fixing the plug bush assembly, so that the plug bush assembly is prevented from shaking in the socket when a plug is plugged into and pulled out of the socket, and stable electric connection is ensured.

The utility model discloses a high-temperature testing device for a radio frequency device, which comprises a high-temperature testing box, a support frame is arranged in the high-temperature testing box, a conveying belt is arranged at the top end of the support frame, bearing tables are uniformly arranged at the top end of the conveying belt, and a heating cover is arranged at the bottom end in the high-temperature testing box. The swinging mechanism is arranged in the mounting movable seat, the first electric push rod is started to drive the rack to move, and under the action of meshing connection, the rotating shaft on the inner side can be driven to rotate, and the mounting frame on the outer side is further driven to be in a swinging state; therefore, cold air generated by the air cooler can be diffused more evenly and widely, the tested filter can be cooled, the situation that workers are hurt when taking the filter due to the too high temperature is prevented, and convenience is brought to testing work of the workers.

This invention discloses a stroke-limiting hydraulic cylinder, including a cylinder barrel, a hydraulic mechanism, and a hydraulic oil circuit, as well as a locking oil circuit and a locking mechanism. The locking mechanism includes a valve stem that moves from a first position to a second position under the drive of hydraulic fluid. A limiting mechanism is used to reset the valve stem from the second position to the first position when the hydraulic mechanism performs a retraction action, cutting off the locking oil circuit from the hydraulic oil circuit, thereby stopping the hydraulic mechanism from retracting and achieving stroke limitation. This stroke-limiting hydraulic cylinder, through the locking mechanism and in conjunction with the limiting mechanism installed on the piston rod, can realize the opening and closing of the locking oil circuit and the hydraulic oil circuit, thereby changing the position state of the valve stem. When the limiting mechanism is installed at a suitable position on the piston rod according to the stroke limitation requirements, the limiting mechanism drives the valve stem to reset while the piston rod performs a retraction action, thereby blocking the hydraulic circuit by the valve stem and preventing further oil return, thus achieving the limiting function.

The utility model relates to the technical field of hanging chairs, in particular to a detachable folding outdoor hanging chair which comprises an outer support, an inner support is installed on one side of the outer surface of the outer support, shaft rods are installed on one side of the outer surface of the outer support and one side of the outer surface of the inner support, and hanging rods are fixedly installed on one side of the outer surface of the outer support and one side of the outer surface of the inner support. A hanging ring is fixedly installed on the outer surface of the hanging rod, a hanging rope is installed at the bottom end of the hanging ring, a back plate and a seat plate are fixedly installed at one end of the outer surface of the hanging rope, connecting blocks are installed on the two sides of the outer surface of the back plate and the two sides of the outer surface of the seat plate, and a fixing groove is formed in one side of the outer surface of each connecting block; sliding grooves are formed in the outer surface of the back plate and the outer surface of the seat plate, and sliding rods are connected to the inner sides of the sliding grooves in a sliding mode. According to the hanging chair, the sliding rods are arranged on the hanging chair, convenience is provided for disassembly, assembly and folding of hanging chair components, the workload of a user is reduced, and the hanging chair is convenient to carry.

The utility model belongs to the field of smoke exhaust air pipes, and particularly relates to a smoke exhaust air pipe convenient to connect, which comprises a first air pipe, the right end of the first air pipe is abutted against the left end of a connecting air pipe, and a connecting component is arranged at the right end of the first air pipe; the connecting assembly comprises a first clamping rod, and the first clamping rod is fixedly connected with the left end of the first air pipe and the left end of the connecting air pipe. Through the structural design of the connecting assembly, the function of connecting air pipes is achieved, and the problems that in the using process of existing air pipes, most of the air pipes are connected through bolts, through the connecting mode, workers need to use installation tools to continuously rotate the bolts in a reciprocating mode to fasten the bolts, and the use cost is high are solved. And in the using process of the bolt, due to the fact that the bolt makes contact with moisture in air, the bolt can be oxidized due to long-time contact, a large amount of rust is generated outside the bolt, and therefore the problem that the bolt slips is solved.

The utility model relates to the technical field of machine tool accessory production, and provides quenching equipment for producing machine tool accessories, which comprises a base and an electric push rod, the electric push rod is fixed on one side of the top end of the base, a heating box is fixed on the top end of the electric push rod, and a connecting block is fixed on the top end of the heating box. A limiting rod is fixed to one side of the bottom end of the connecting block, a heating wire is installed on the outer wall of the side, close to the limiting rod, of the heating box, a supporting plate is fixed to the side, away from the base, of the top end of the base, and a water spraying structure is arranged on the side, close to the base, of the supporting plate. By arranging the collecting structure, water used for cooling the accessory body can fall into the recycling tank and is discharged into the collecting box through the flow guide pipe, used waste water is collected and recycled, waste of resources can be reduced, the device has the waste water recycling function, and the waste water recycling effect is improved. And the environmental protection property of the quenching equipment for producing the machine tool accessories during use is improved.

The utility model discloses an automatic welding equipment positioning mechanism which comprises a base, a mounting groove is formed in the top of the base, a driving assembly is arranged on one side of the base, two placing frames are arranged outside the driving assembly, placing grooves are formed in the placing frames, through openings are formed in the tops of the inner walls of the placing grooves, and through holes are formed in the inner walls of the placing grooves. A rotating assembly is arranged on one side of the inner wall of the containing groove, two limiting strips are arranged outside the rotating assembly, and an adjusting assembly is arranged on the surface of the inner wall of the containing groove. Through cooperative use of the placing frame, the placing groove, the rotating assembly, the limiting strips, the adjusting assembly and other structures, the two limiting strips are close to each other and clamp the two sides of a steel plate, the function of limiting the two sides of the steel plate is achieved, the situation that when the steel plate is welded, the steel plate shakes, and consequently the position deviates is avoided, and the welding quality of the steel plate is improved. The steel plate welding precision is improved, and the steel plate welding effect is guaranteed.

The utility model discloses an electric tool adaptive to European Union standards and provided with a rapid power-off protection device, and relates to the technical field of electric tools. The front end of the body is detachably provided with a tool head, the body is internally and detachably provided with a battery, the battery is connected with a driving motor through a control panel, the driving motor is connected with the tool head through a transmission mechanism, the outer side of the body is further provided with a switch connected with the control panel in a matched mode, and one end of the battery is fixedly connected with an electrode plate B; the other end of the electrode plate B abuts against the electrode plate A. The electrode plate A and the electrode plate B are both connected with the control panel. The battery and the electrode plate A are designed to be separable, so that a user can quickly separate the battery from the electrode plate A to realize power failure; the tool head is detachably mounted, so that a user can select a proper tool head for mounting conveniently, the equipment can adapt to various different working environments and requirements, multiple tools do not need to be carried, and the convenience is improved; and a limiting bead is arranged, so that the tool head is limited, and the use safety is improved.