49results about How to "Fast and easy fixation" patented technology

Disclosed is an automobile racing simulator capable of achieving six space freedom degrees. On the basis of a classic Stewart platform, an automobile racing seat, a displayer fixing frame assembly, pedals and a steering wheel are connected to an automobile body, a person sits on the automobile racing seat, the steering wheel and the pedals are controlled according to game scenes displayed in liquid crystal displayers, and the person can have the acceleration, deceleration, sudden turning, impacting and other true experience feelings. The automobile body, a base and a displayer support are formed by bending and welding seamless polished pipes, the appearance is attractive and fashionable, the three liquid crystal displayers are fixed easily, rapidly and conveniently, and maintenance is convenient.

The invention discloses automatic spring production pressure detection winding equipment, which comprises a main body, a push plate, a top plate and a baffle, wherein a clamping structure is movably connected to the interior of the main body, a gravity sensor is fixedly connected to the top end of the main body, a third servo motor is fixedly connected to the top end of the gravity sensor, secondsliding grooves are evenly formed in the top end of the main body, limiting rods are movably connected to the interiors of the second sliding grooves, and baffles are fixedly connected to the two sides of the top end of the main body correspondingly. According to the invention, the top end of the top plate is fixedly connected with the hydraulic air cylinder, the hydraulic air cylinder is startedto control the hydraulic telescopic rod to push the push plate to be adjusted up and down, and due to the fact that the sliding structure is formed between the limiting sliding block and the first sliding groove, the moving direction of the push plate can be limited under the action of the limiting sliding block and the first sliding groove, so that the height of the push plate can be adjusted upand down very stably, and the vertical pressure of the spring can be measured more accurately.

The invention discloses a minitype workpiece discharging device which comprises a discharging box and a discharging plate, wherein the outer side and the bottom of the discharging box are in sealed connection through an enclosing plate; the upper end of the discharging box is open; the plate surface at the lower end of the discharging plate is hinged to the box body at the upper end of the discharging box; a plurality of discharging rollers are mounted on the discharging plate; a discharging buffer plate is arranged in the discharging box; the plate surface at one end of the discharging buffer plate is connected onto the box body on the inner side of the discharging box; a torsion spring is mounted at the connecting end of the discharging buffer plate and the discharging box; magnet sucking discs are arranged on the box body at the back end of the discharging box. Through the adoption of the manner, minitype workpieces processed by a machine tool can be automatically discharged and treated, the discharging buffer plate in the discharging box can conduct supporting, blocking and buffering on the discharged workpieces, the condition that the discharged workpieces is collided to be damaged due to too large impact force is avoided, and the fixing manner of the discharging box and the machine tool is simple and convenient.

The invention relates to the technical field of structural culverts, in particular to a fabricated steel-concrete composite structure culvert which comprises a bottom plate body, a standing plate body and a top plate body, first inserting blocks are fixedly connected to the upper surface of the bottom plate body, the four sets of first inserting blocks are symmetrically distributed in pairs, and first locking holes are formed in the side walls of the first inserting blocks. A second inserting block is fixedly connected to the bottom of the top plate body, a second locking hole is formed in the side wall of the second inserting block, positioning grooves are formed in the top and the bottom of the standing plate body, fixing mechanisms corresponding to the first inserting block and the second inserting block are arranged on the side wall of the standing plate body, and a positioning hole is formed in one side of the upper surface of the bottom plate body; a locking mechanism is arranged on the other side of the upper surface of the bottom plate main body, when the bottom plate main body, the standing plate main body and the top plate main body are mounted, positioning and mounting of the bottom plate main body, the standing plate main body and the top plate main body are facilitated, the splicing time is saved, the accuracy of the mounting position is guaranteed, and the bottom plate main body, the standing plate main body and the top plate main body can be temporarily fixed.

The invention discloses a fresh food storage device used for cold chain logistics and capable of performing grading storing. The fresh food storage device used for the cold chain logistics and capableof performing grading storing comprises a box body, a refrigeration device, a control mechanism and a track. A heat preservation plate is arranged in the box body in an embedded mode, a vertical plate is connected into the box body in a penetrating mode, the refrigeration device is located at the inner bottom of the box body, a brake roller is fixedly arranged at the lower end of the box body, anaccommodating assembly is arranged in the box body, a limiting block is connected into a fixing plate in a penetrating mode, a reset rod is connected to the outer end of the limiting block in a welded mode, a spring is fixedly installed on the outer surface of the fixing plate, and bottom studs are connected to the lower surface of the box body in a welded mode. The fresh food storage device usedfor the cold chain logistics and capable of performing grading storing has the function of grading storing, can store different kinds of fresh food at the same time, has good sealing effect and a simple and fast sealing method and saves energy during transportation, the box body is convenient to stack, and the extrusion damage of the box body is not caused.

The invention discloses a building construction street lamp with a variable illumination range. The building construction street lamp comprises an adjusting structure, a fixing plate, second fixing bolts and stand columns. The bottom end of the stand column is fixedly connected with the fixing plate. The second fixing bolts are fixedly connected to the two sides of the fixing plate, fixing blocksare fixedly connected to the two sides of the stand column, mounting feet are fixedly connected to the two ends of the fixing block correspondingly, third fixing bolts are fixedly connected to the interiors of the mounting feet, cavities are movably hinged to one side of the fixing block, LED lamps are evenly and fixedly connected to the bottom ends of the cavities correspondingly, and the adjusting structure is arranged at the top end of the fixing block. The mounting feet are fixedly connected to the two ends of the fixing block, the third fixing bolts are used for fixing the mounting feet,the fixing block is fixed to the two sides of the stand column, the fixing mode is simple and rapid, the mounting work efficiency can be improved, and the cavity is more convenient to mount.

The invention is applicable to the technical field of pipe cutting, and provides a tilt angle adjustable pipe cutting positioning device. The device comprises a workbench and a pipe body, wherein supporting legs are fixedly mounted at the lower end of the workbench, a fixing seat is arranged above the workbench, the outer wall of the fixing seat is provided with a cross rod in a penetrating manner, a limiting clamp is mounted inside the fixing seat, the inner surface of the limiting clamp is connected with a protective pad, the pipe body is located on the inner side of the limiting clamp, thelower end of the limiting clamp is connected with the fixing seat through a limiting shaft, the lower end of the fixing seat is connected with a bottom plate, the lower end of the bottom plate is hinged to the upper end of an electric telescopic rod through a mounting head, the electric telescopic rod is located inside a fixing box, and the fixing box is fixedly mounted on the lower surface of theworkbench. According to the tilt angle adjustable pipe cutting positioning device, a tilt angle of a pipe can be adjusted, cutting of different angles of the pipe is facilitated, and the fixing manner and steps are simple, quick and convenient.

A device for use in tensioning a cable around a long bone for use in orthopaedic procedures is provided. The device includes a body. The device also includes first connecting means operably associated with the body for connecting a first end of the cable to the device. The device also includes second connecting means operably associated with the body for connecting a second end of the cable to the device. The first connecting means and / or the second connecting means include a unidirectional locking mechanism for tightening the cable.

The invention discloses ball valve machining equipment. The equipment comprises valve cores with medium flow passages, valve bases matched with the outer walls of the valve cores, a rack, first fixingassemblies penetrating through the medium flow passages, a first driving assembly for driving the first fixing assemblies to rotate longitudinally, first clamping structures disposed on the first fixing assemblies, second fixing assemblies, second clamping structures disposed on the second fixing assemblies and a second driving assembly. The first clamping structures firmly abut against the innerwalls of the medium flow passages to fix the valve cores; the second clamping structures are used for clamping the valve bases to make the valve bases be in contact with the valve cores; the second driving assembly is used for driving the second fixing assemblies to rotate in order to drive the valve bases to be in friction with the valve cores. The valve bases different in specification and sizeand the valve cores different in specification and size are clamped by the same equipment; therefore, in the process of machining the valve bases and the valve cores, various matched valve bases andvalve cores can be machined by the same equipment at the same time, the machining efficiency is high, and the cost required by the equipment is reduced.

The invention relates to a building curtain wall lath aluminum veneer. The building curtain wall lath aluminum veneer comprises frames, adaptor blocks, an aluminum mesh, a mounting assembly, a splicing block and a tensioning assembly. The aluminum mesh is fixed in the frames through the tensioning assembly. The frames are fixed through the adaptor blocks. The mounting assembly is arranged on the outer walls of the frames. The two adaptor blocks are fixed through the splicing block. The mounting groove is formed in the position, where the tensioning assembly is connected, of one sides of the frames. A locking groove is formed in the horizontal position, opposite to the mounting groove, of the other sides of the frames. A threaded sleeve is arranged in the locking groove. First round connecting grooves are symmetrically formed in the side walls of the frames. Portions, connected with the adaptor blocks, of the two ends of the frames are provided with threaded holes perpendicular to the mounting grooves. A first fixing plate and a second fixing plate penetrate through the upper and lower end surfaces of the aluminum mesh. The building curtain wall lath aluminum veneer has the characteristics of being low in maintenance cost, large in connection strength, difficult to damage, strong in adaptability and the like.

The invention discloses a medical standard 90-degree lateral position operation fixing frame and a sterile assembly used by the medical standard 90-degree lateral position operation fixing frame, which aim at solving problems that in prior art, when a lumbar disc herniation operation is conducted and body of a patient is fixed through a binding or clamping method, a binding or clamping device blocks X-rays, and time and labor are wasted in fixing process. The sterile assembly is made of high-temperature plastic or silica gel, and comprises a bracket III and a bracket II, one end of the bracketIII is connected to the upper end of the medical standard 90-degree lateral position operation fixing frame, a bracket I is arranged at the lower end of the medical standard 90-degree lateral position operation fixing frame, a first fixing plate, a second fixing plate and a third fixing plate are arranged on the bracket I, the bracket II and the bracket III respectively, and the first fixing plate fixes a lateral anterior superior spine below the body of the patient. The third fixing plate is used for fixing the lateral anterior superior spine above the body of the patient; the sacrum position of the patient is fixed through the second fixing plate, a human body can be rapidly fixed through the fixing frame of the structure, the time before an operation is saved, and the fixing effect isgood.

The invention discloses a structure for input fixing of RV reducer comprehensive performance test equipment. The structure comprises a tested RV reducer, a reducer mounting bracket, a positioning disk, a connection positioning sleeve, an input fixer, a reducer input shaft, an input flange and an input main shaft, wherein the positioning disk is mounted on the reducer mounting bracket through a group of screws; the connection positioning sleeve is mounted on the positioning disk from the input end side; the connection positioning sleeve has an inner ring and an outer ring and is provided with two groups of mounting holes; the tested RV reducer is mounted on the connection positioning disk through the group of mounting holes on the inner ring; and the input fixer is mounted on the connectionpositioning sleeve through the group of mounting holes on the outer ring. According to the structure, the input end of the tested reducer is fixed, the fixing manner is simple and rapid, and the favorable fixing effect is capable of enabling the return difference static measurement result to be more reliable.

The invention discloses a cable fixing device for municipal engineering and a using method thereof, and relates to the technical field of municipal engineering. The cable fixing device comprises a U-shaped plate and a fixing plate, wherein the left side wall and the right side wall of the U-shaped plate are both provided with second sliding grooves, sliding blocks are slidably connected into the two second sliding grooves, and the opposite surfaces of the two sliding blocks are fixedly connected with the left side surface and the right side surface of the lifting plate correspondingly. According to the cable fixing device for municipal engineering and the using method thereof, a rotating rod is rotated reversely to drive two first screws and two second screws to rotate synchronously, the first screws and the second screws enable two second nuts to get away from each other in the rotating process, movement of the second nuts drives a connecting block and an arc-shaped sliding block to move, then the arc-shaped sliding block is made to get close to the arc-shaped block, and then the cables are clamped and fixed through a first protection pad and a second protection pad, so that the device can clamp and fix the four cables at the same time, the fixing mode is simple and rapid, and the device is convenient for workers to use.

The invention discloses a face shaping device for improving shaping precision, and relates to the technical field of face shaping. The face shaping device comprises a circular arch frame, wherein a head fixing mechanism, a forehead fixing mechanism, a chin fixing mechanism and a protection mechanism are arranged on the circular arch frame, outer walls of two sides of the circular arch frame are each fixedly provided with a set of protection shells, and a bearing plate is fixedly installed on a front side of the circular arch frame. The facial shaping device can simultaneously limit and fix theforehead, the head and the chin of a shaper, improve the fixation effect,reduce deviation of the shaper's head during a shaping process, facilitate the shaper to place the hair braid in between to avoid a situation that the hair braid is pressed by the shaper's head and affects balance of the shaper, jointly improve shaping accuracy, has a simple and fast fixing method, is convenient for fixing and relaxing the head of the shaper before and after the shaping process, and improves actual use experience effect.

The invention discloses a harmonic reducer comprehensive performance test equipment input fixing structure.An input fixing disc is a main device for fixing the input end of a tested harmonic reducer,is of a fan-shaped structure, and is provided with two groups of mounting holes, namely inner-ring mounting holes and outer-ring mounting holes. When the input end of the tested harmonic reducer is fixed, two input fixing discs need to be installed so as to achieve a good fixing effect. The input fixing disc is fixed to a connecting positioning sleeve through the outer-ring mounting holes and fixed to the flange end face of a speed reducer input shaft through the inner-ring mounting holes, and therefore, the input end is fixed. In order to prevent the input fixing disc from being in direct contact with the tested harmonic reducer to damage the tested harmonic reducer, a gasket is added between the input fixing disc and the tested harmonic reducer to realize protection.

The invention relates to the technical field of cooking equipment, in particular to prefabricated vegetable raw material cooking equipment and cooking method. The equipment comprises a cooking cylinder, a heating disc fixedly arranged on the inner side of the bottom end of the cooking cylinder, an opening cover rotationally connected to the top end of the cooking cylinder through a hinge and an exhaust cap arranged on the inner side of the opening cover, andthe opening cover is provided with an internal rotating mechanism. According to the cooking device, stirring and overturning of cooking objects in the cooking cylinder can be achieved through the arranged internal rotating mechanism, the overturning method does not need to open the opening cover, operation steps are reduced, the possibility that workers are scalded is reduced, the practicability is good, during overturning, a rotating handle is inserted into the inner side of the right end of a rotating column, the rotating handle can drive the rotating column to rotate, the rotating column can drive a gear to rotate, the gear can drive the rotating disc to rotate through a gear ring, the rotating disc rotates to drive stirring telescopic rods on the two sides of the bottom end to rotate, and the cooking objects in the cooking cylinder are driven to turn over through rotation of the stirring telescopic rods.

The invention discloses a workpiece burr polishing device capable of polishing plural workpieces simultaneously and relates to the field of machining. The workpiece burr polishing device comprises a base plate, a bearing ring fixing device and an auxiliary supporting device, wherein the bearing ring fixing device is arranged on the upper surface of the base plate, and the auxiliary supporting device is arranged on one side of the bearing ring fixing device. By arranging a plurality of bearing ring processing parts integrally outside ejector blocks in a sleeving manner correspondingly and connecting a sealed rotating connector connected to the end part of a hollow rotating shaft to a hydraulic pump through a hydraulic pipe, hydraulic oil can be introduced into an inner oil cavity in a mounting cylinder seat, and after the hydraulic oil is introduced into the inner oil cavity, the ejector blocks are ejected outward by piston rods, so that the ejector blocks lean against the inner walls of the bearing ring processing parts tightly to fix the bearing ring processing parts, and therefore, the fixing mode is simple and convenient.

The invention discloses culture education equipment for live broadcast teaching, particularly relates to the technical field of teaching equipment, and aims to solve the problems that an existing double-sided display board is inconvenient to rotate and is inconvenient to fix after rotation, and the height of the existing double-sided display board cannot be adjusted according to needs of people. A supporting plate is slidably arranged in an inner cavity of the rectangular block, a placement box is fixedly arranged on the supporting plate, a double-sided display board is rotatably arranged on the placement box, a lifting device is arranged on the inner side of the rectangular block, a rotating device and a rotating long column are arranged, the long column rotates to drive a first bevel gear to rotate, and then a second bevel gear is driven to rotate; by arranging a lifting device and starting a motor, a driving wheel is further driven to rotate, then a supporting plate is driven to move upwards through a rack, the double-sided display plate is further driven to move upwards, and height adjustment of the double-sided display plate is achieved.

The invention discloses a warning device with the storage and placement function for electric power construction, and relates to the technical field of electric power construction. The device comprises a fixing frame, a box body and a supporting frame are fixedly connected to the top and the bottom of the fixing frame correspondingly, and two mounting bases are fixedly connected to the bottom of the box body. According to the warning device with the storage and placement functions for electric power construction, a lifting plate and pulleys move upwards, then the pulleys do not make contact with the ground any more, the supporting frame makes contact with the ground, the device is supported and fixed; meanwhile, a third screw and a fourth screw enable two second nuts to be far away from each other in the rotating process; nuts II move to drive an F-shaped plate, a mounting plate and an LED screen to move, then the LED screen is moved out of a U-shaped plate, warning slogans are displayed through the LED screen, so that unfolding and fixing work of the warning device is completed, the fixing mode is simple and rapid, the automation degree is high, and convenience is brought to use of workers.

The invention provides a guide frame fixing construction method, and belongs to the technical field of guide frames. According to the fixing construction method, fixing is achieved through a lifting pile leg carried by the guide frame, the lifting of the pile leg mainly depends on mechanical driving, the fixing mode is simple and convenient, and the structure is stable. The guide frame fixing construction method comprises the following steps that the guide frame is accurately transported in place through positioning; the pile leg is lowered for multiple times through a lifting driving device until the pile leg is inserted into a water sediment layer; a platform is driven by the lifting driving device to climb along the pile leg multiple times until the platform is not affected by buoyancy,and in the climbing process of the platform, the pile leg is further pressed into the water sediment layer under the action of the gravity of the platform until stability is achieved; and the platform is driven by the lifting driving device to descend multiple times along the pile leg until reaching the platform using position.

The invention discloses a low-power-consumption intelligent electronic tapered end, relates to an electric combination lock, and in particular relates to a tapered end of an electric combination lock. The invention aims at providing a low-power-consumption intelligent electronic tapered end without a position detection device on a circuit control part and with relatively smaller volume. The low-power-consumption intelligent electronic tapered end comprises an electronic control circuit part and a miniature motor 21, wherein a shifting rod 22 is arranged on a miniature motor rotating shaft. The low-power-consumption intelligent electronic tapered end also comprises a trip assembly, wherein the trip assembly comprises an assembly frame body 31, a demilune body 32 and a limit wafer 33, eccentric columns 34 are inserted on the assembly frame body and the limit wafer, limit cams 35 are sleeved on the eccentric columns, a locking marble 36 is slidably connected in the demilume body, a pressure spring 37 is sleeved on the locking marble, an upper arm 351 and a lower arm 352 are respectively arranged on the limit cam, and an elastic reset part is arranged above the limit wafer. When the lower arm is shifted by the shifting rod, the lower arm is separated from the rotating rail of the shifting rod, and the upper arm is separated from the barrier of the elastic reset part to be unlocked; and the reset is completed by the elastic reset part.

The invention discloses a convenient-to-install automobile instrument detection device, which comprises a main body, a storage box and a clamping plate, the two sides of the interior of the main body are each provided with an installation structure, each installation structure comprises a sliding block, a reset spring, a sliding rod, a reserved cavity and a limiting block, the reserved cavities are arranged on the two sides of the bottom end of the interior of the main body, and the limiting blocks are arranged in the reserved cavities. Sliding rods are fixedly connected to the two ends of the interior of the reserved cavity, reset springs are movably connected to the outer sides of the sliding rods, sliding blocks are fixedly connected to one sides of the reset springs, and limiting blocks are fixedly connected to one sides of the sliding blocks. The protective pad is fixedly connected to the bottom end of the interior of the storage box, the air bags are uniformly and fixedly connected to the interior of the protective pad, and under the action of the air bags, the protective pad has certain elasticity and can be tightly attached to the bottom end of the main body, so that the clamping plate and the handle are prevented from vibrating, and the main body is prevented from being damaged in the storage and transportation process.

The invention provides a synchronous assembling and conveying production line applied to an engine production process. Two hydraulic rods are arranged on each limiting-fixing plate, and four rodless air cylinders are arranged and fixed on each limiting-fixing plate, so that engines can be firmly fixed on the synchronous assembling and conveying production line, and the synchronous assembling and conveying production line can be applied to the engines of different heights; open slots are arranged on the outer sides of linkage rotating discs, screw threads are arranged on the inner walls of theopen slots, the diameters of control rotating discs are greater than those of the linkage rotating discs, and second threaded slots are arranged on the inner sides of threaded connecting holes, so that during the work of the synchronous assembling and conveying production line, the positions of the engines can be rotated at any time through the cooperation between the control rotating discs and the linkage rotating discs; and the second threaded slots and the first threaded slots are always positioned in one and the same transverse horizontal plane, the threaded connecting holes and the open slots are always positioned in one and the same transverse horizontal plane, non-slip friction blocks are arranged on the outer sides of elastic blocks, and bearing plates are arranged on the inner sides of the elastic blocks, so that during the use of the synchronous assembling and conveying production line, the engines can be fixed in a simple and quick manner as well as better protected.

The invention relates to a building curtain wall lath aluminum veneer. The building curtain wall lath aluminum veneer comprises frames, adaptor blocks, an aluminum mesh, a mounting assembly, a splicing block and a tensioning assembly. The aluminum mesh is fixed in the frames through the tensioning assembly. The frames are fixed through the adaptor blocks. The mounting assembly is arranged on the outer walls of the frames. The two adaptor blocks are fixed through the splicing block. The mounting groove is formed in the position, where the tensioning assembly is connected, of one sides of the frames. A locking groove is formed in the horizontal position, opposite to the mounting groove, of the other sides of the frames. A threaded sleeve is arranged in the locking groove. First round connecting grooves are symmetrically formed in the side walls of the frames. Portions, connected with the adaptor blocks, of the two ends of the frames are provided with threaded holes perpendicular to the mounting grooves. A first fixing plate and a second fixing plate penetrate through the upper and lower end surfaces of the aluminum mesh. The building curtain wall lath aluminum veneer has the characteristics of being low in maintenance cost, large in connection strength, difficult to damage, strong in adaptability and the like.

The invention discloses a self-locking support which comprises a fixed seat. An overturning seat is rotatably connected with the fixed seat; a rotating shaft piece is connected with the overturning seat and the fixed seat and comprises a fixed shaft and a rotating shaft which are coaxially arranged, the fixed shaft is arranged on the fixed seat, the rotating shaft is arranged on the overturning seat, a first convex part is arranged at the end part of the fixed shaft, a second convex part is arranged on the rotating shaft towards the fixed shaft, the rotating shaft is suitable for rotating along with the overturning seat and enabling the first convex part and the second convex part to be in contact with each other or separated from each other; a push plate is arranged on the fixed seat in a sliding manner; and an elastic piece is connected with the push plate and the fixed seat, the elastic piece is suitable for driving the push plate to move towards the other side of the overturning seat and is connected with the overturning seat, and the push plate is suitable for fixing the overturning seat and the fixed seat. The fixing mode of the support is simple and fast, a tedious fixing and assembling structure is avoided, and the locking and overturning efficiency of a sighting telescope is greatly improved.

The invention discloses a telescopic supporting rod and a formwork supporting frame structure, and relates to the field of buildings. The problems that in slope or storey height special engineering, a specially-made vertical rod or field cutting is needed, and consequently material waste or cost increasing is caused are solved. The telescopic supporting rod comprises a first rod, a second rod, an adjusting ring and a positioning buckle, wherein a plurality of adjusting holes are formed in the side wall of one end of the first rod and symmetrically formed at intervals in the axis direction of the first rod; adjusting clamping grooves are formed in the side wall of one end of the second rod and symmetrically formed in the axis direction of the second rod; after the end, close to the adjusting holes, of the first rod is inserted in the end, close to the adjusting clamping grooves, of the second rod in a bearing manner, at least one pair of symmetrically-formed adjusting holes right faces the symmetrically-formed adjusting clamping grooves; the adjusting ring is arranged on the outer side wall of the end, provided with the adjusting clamping grooves, of the second rod in a position-adjustable manner; and after sequentially penetrating the adjusting holes and the adjusting clamping grooves, one end of the positioning buckle is clamped above the adjusting ring. The telescopic supporting rod has the beneficial effect that the length is adjustable, cost can be reduced, and the construction efficiency is improved.

The invention discloses anti-collision test equipment and a test method for a liquid crystal display screen. The anti-collision test equipment comprises a working table, a connecting table, a fixed table and a test table. Through the arrangement of the fixed table, a liquid crystal display screen slides downwards along a guide slot of the fixed table when being fixed. When the two corners of the bottom end of the liquid crystal display screen slide to be clamped to a clamping plate A, a clamping plate B automatically clamps the two corners of the top end of the liquid crystal display screen. The fixing mode is simple and fast, and therefore, the test efficiency of the liquid crystal display screen is improved. A movable plate pulls a steel wire rope after bearing the gravity of the liquidcrystal display screen, the steel wire rope pulls a rotating column under stress, part of the gravity of falling of the liquid crystal display screen is converted into a pulling force, and the fallingof the movable plate is relieved. The falling speed of the liquid crystal display screen is limited, and the situation that the liquid crystal display screen is impacted by falling due to the too high falling speed is avoided. Through the arrangement of an air cushion, the testing strength can be adjusted at will according to different products.

The invention relates to a cleaning device and particularly to the cleaning device for electric vehicles. The invention aims to solve the technical problem of providing the cleaning device for the electric vehicles, wherein the cleaning device is capable of adjusting the angle of a brush according to different angles of vehicle surfaces and is flexible in use. In order to solve the technical problem, the invention provides the cleaning device for the electric vehicles. The cleaning device comprises a hollow support rod and so forth, wherein a lifting and lowering device is arranged inside thehollow support rod; a mounting plate is arranged on the top of the lifting and lowering device; and the mounting plate is provided with a fixing device. The cleaning device for the electric vehicles achieves the effect of cleaning distant surfaces of the vehicles when a cleaning worker stands still by clockwise or counterclockwise turning a rotating rod to allow a lifting and lowering rod and devices thereon to move up and down, and achieves the effect of effectively removing dust and dirt from the vehicle surfaces by replacing clean cotton cloths to clean the vehicle surfaces.