231results about How to "Flexible switching" patented technology

This invention provides a method for rapid assembly of a modular tubular beam car body. The car body is divided into several independent modules, which are manufactured in parallel at independent workstations or assembly lines. Corresponding connections between different independent modules are fitted with interlocking mortise and tenon structures for coarse positioning and fastening. The manufactured independent modules are then automatically transferred to an assembly station, where a robot grasps and rapidly assembles them. After assembly, bolts and / or structural adhesive are used to fasten the mortise and tenon joints. Compared to traditional assembly line production processes, this method significantly improves efficiency and economy, effectively reduces floor space, and overcomes the limitation of existing "unpacking processes" that are only suitable for single-model production, thus facilitating flexible manufacturing and rapid iteration across multiple models.

The utility model provides side slope concrete spraying equipment which comprises a slope top moving mechanism and a slope bottom moving mechanism which are arranged on the top of a side slope and the bottom of the side slope, a guide mechanism parallel to the side slope is arranged between the slope top moving mechanism and the slope bottom moving mechanism, and a spraying mechanism capable of sliding in the height direction of the side slope is arranged on the guide mechanism. A lifting mechanism connected with the spraying mechanism is arranged on the slope top moving mechanism, a concrete spraying machine is arranged on the slope bottom moving mechanism, and the conveying end of the concrete spraying machine is connected with the spraying mechanism through a telescopic hose. The moving mechanisms are arranged at the top and the bottom of the side slope and matched with the guide mechanism parallel to the side slope, so that the spraying mechanism can stably ascend and descend along the guide mechanism, ecological concrete is accurately sprayed to the side slope, mechanization and continuity of spraying operation are effectively achieved, and the working efficiency is improved. And the phenomena of concrete dispersion and waste caused by long distance and large height in manual operation are avoided, and the spraying uniformity and the construction quality are remarkably improved.

This invention discloses a differential VGA signal decoding and display device, relating to the display field. It includes a signal input module, an ESD protection module, a differential receiving module, a synchronization separation module, an image decoding driver module, a display module, an audio processing module, and a control module. These modules are interconnected and work together to decode, process, and display differential VGA signals. This differential VGA signal decoding and display device solves the problems of short transmission distance, weak anti-interference capability, limited resolution, and high power consumption associated with traditional VGA interfaces. It also achieves full compatibility with traditional VGA devices, integrating audio processing, local playback, intelligent signal enhancement, and remote monitoring and management functions. It achieves reliable conversion from analog to differential signals, supports high-definition display, and has a transmission distance of up to 50 meters, while maintaining full compatibility with traditional VGA devices. This technology is particularly suitable for professional fields such as industrial automation and medical imaging, meeting the diverse display and intelligent operation and maintenance needs of professional scenarios.

This invention discloses a drill pipe transport device, relating to the technical field of drill pipe storage devices. It includes a transport arm with a blocking part, a first transport section, and a second transport section. Both the first and second transport sections are capable of carrying and transporting drill pipes. The blocking part is used to prevent the drill pipe on the first transport section from being transported to the second transport section. A lever mechanism is movably connected to the transport arm and can move to either a first state or a second state. In the first state, the lever mechanism is hidden inside the transport arm. In the second state, the lever mechanism can extend out of the transport arm and lift the drill pipe from the first transport section to the second transport section. Therefore, this device can improve drill pipe transport efficiency and meet the need for rapid drill pipe transport.

The invention discloses a porous medium combustor unit regeneration system and a regeneration method thereof, and relates to the technical field of combustors, the porous medium combustor unit regeneration system comprises a porous medium combustor unit and a premixed gas pipeline connected with the porous medium combustor unit, the burner further comprises a waste gas pipeline, a premixing pipeline stop valve, a matching buckle cover and a compressed air pipeline branch pipe, the waste gas pipeline communicates with the porous medium burner unit, the waste gas pipeline stop valve is arranged on the waste gas pipeline, the premixing pipeline stop valve is arranged on the premixing gas pipeline, and the matching buckle cover is arranged on the compressed air pipeline branch pipe. The matching buckle cover is detachably buckled on the porous medium burner unit to form a closed space, at least one compressed air connector is arranged on the matching buckle cover, and the compressed air pipeline branch pipe is communicated with the compressed air connector and provided with a branch pipe cut-off valve. The integral online regeneration of the porous medium combustion unit can be realized, the operation is simple, the risk of disassembly and damage is avoided, and the service life of the combustor is effectively prolonged.

The invention provides a continuous polypeptide precipitation system. The polypeptide continuous precipitation system comprises: a main heat exchange module, wherein the main heat exchange module is provided with an input end and an output end; the precipitation module comprises at least two mixing-precipitation curing units which are arranged in series, each mixing-precipitation curing unit comprises a cyclone mixer and a precipitation ager, an inlet of the precipitation ager is communicated with a first outlet pipe of the cyclone mixer, and an outlet pipe of the precipitation ager is communicated with a second outlet pipe of the cyclone mixer; the output end of the main heat exchange module is communicated with a first inlet pipe of a rotational flow mixer of the head end mixing-precipitation curing unit, first inlet pipes of other rotational flow mixers are communicated with an outlet of an upstream precipitation curing device, and second inlet pipes are used for inputting a precipitation solvent into the rotational flow mixers; and the filtering module comprises a suction filter and a waste liquid bottle and is selectively communicated with the outlet of the precipitation ager. According to the continuous polypeptide precipitation system, full continuous operation of the system can be realized, continuous polypeptide precipitation is realized, the efficiency is higher, and the operation is simpler and more convenient.

This invention discloses an in-situ lunar regolith thermal energy storage and controllable utilization device, relating to the field of lunar surface thermal energy storage technology. The invention includes: a lunar regolith thermal storage body, formed by high-temperature melting of in-situ lunar regolith for storing thermal energy; a heat spreader plate, disposed on the lower surface of the lunar regolith thermal storage body, serving as a channel for energy exchange between the lunar regolith thermal storage body and the outside; and a heat expansion component, fixedly connected to the heat spreader plate, used to improve the heating efficiency of the lunar regolith thermal storage body during the heating process. This invention achieves efficient storage of solar energy and redundant electrical energy during lunar daytime by combining the lunar regolith thermal storage body with a high-efficiency heat expansion component, and achieves stable energy release and cascaded utilization through a controllable heat release component, thereby realizing peak shifting and valley filling of lunar surface energy in both time and space dimensions.

This utility model discloses a desalination device for bamboo shoot canning, including a desalination tank. Vertical plates are welded to the side walls of the desalination tank, and guide platforms are welded to the surface of the vertical plates. Beneficial effects: By activating the servo motor inside the drive housing, the gear at the output end of the servo motor rotates. Since the gear meshes with the rack of the guide platform, and the turnover box is fixedly connected to the drive housing, and the turnover box is slidably connected to two sliding rods inside the desalination tank, as the drive housing moves along the length of the guide platform, the drive housing drives the turnover box to pass sequentially through several water tanks opened from left to right within the desalination tank. During this process, by activating the extension and retraction of the electric cylinder inside the turnover box, the lifting block at the bottom of the electric cylinder drives the basket to rise and fall, allowing the basket to flexibly switch between being above the water tank and submerged inside the water tank. Combined with the ultrasonic vibrating plates installed in the corresponding water tanks, it has the advantages of multi-stage ultrasonic oscillation desalination and flexible turnover.

The present application relates to the technical field of stage lighting, and discloses an effect device for shaping stage light effect, comprising a lamp body, the lamp body comprising a connecting top seat and a lamp shell body, a light source is arranged in the lamp shell body, an adjusting device is connected to the lamp shell body, the adjusting device comprising: an extension shell body; two fixed pipes symmetrically connected to the extension shell body; an optical lens, both ends of the optical lens being connected to an upper cavity and a lower cavity respectively, the optical lens being a hollow structure, and the inner walls of the upper cavity and the lower cavity being fixedly connected to impellers; a connecting pipe, respectively connecting the upper cavity and the lower cavity; wherein, one side end face of the optical lens is a one-way perspective glass, the other side end face is ordinary glass, two fixed pipes are respectively connected to a liquid pipe, the two liquid pipes are both connected to an external water tank, a water pump is connected to the two liquid pipes, and the two liquid pipes are arranged on the inner wall of the lamp shell body, solving the problems of high energy consumption and single effect of the existing equipment.

This utility model belongs to the technical field of rail cutting machines, and specifically relates to a 36V dual-lithium battery rail cutting machine. It includes: two 36V lithium battery packs connected in series and detachably locked onto a mounting base on top of a motor; a connecting plate, one end of which is mounted to the motor, and the other end of which is fitted with a rotatable cutter head, and the motor and cutter head are connected by a transmission mechanism; wherein the connecting plate includes: a main connecting plate and a secondary connecting plate; the main connecting plate and the secondary connecting plate are detachably locked together; a fixing sleeve, the main connecting plate having a through groove and a waist-shaped slot, the fixing sleeve being movably inserted into the through groove, and the fixing sleeve being locked in place by a locking bolt; this utility model uses dual 36V lithium battery packs connected in series to replace the existing 72V single lithium battery pack power supply, reducing maintenance costs.

This utility model discloses a drying and sealing storage chamber for pharmaceutical excipients, including a chamber body and a storage rack. The top of the chamber body has two slots, each with a drying frame inserted into its inner side. Each drying frame has an opening at its top and a movable plate is detachably connected via bolts. The left and right drying frames are fixedly connected by a lifting frame. Two partitions are fixedly connected to the inner side of the chamber body, each partition having three ventilation slots on its surface. A fan is installed inside each ventilation slot. This utility model, by providing a detachable drying frame at the top of the chamber body, combined with the lifting frame, allows for complete removal and replacement of the desiccant without opening the chamber body. This avoids external environmental interference with the internal drying process. Compared to traditional fixed drying structures, it achieves flexible switching between drying and ventilation, improving operational efficiency.

The embodiment of the application provides a deep and shallow combined pool multi-board wave making composite control system, and relates to the technical field of ocean engineering model testing. A main controller is in communication connection with a shallow water wave making system, a deep water wave making system and a user control terminal. The main controller receives token application information from the user control terminal, judges the state of the token application information, and outputs corresponding token authorization information to the user control terminal according to the state judgment result. The main controller matches the control instruction set of the user control terminal and the target wave making system according to the token authorization information to obtain a target instruction set. The user control terminal calls the target instruction set to output a wave making control signal to control the target wave making system. The token control of the main controller ensures that the control right of the user control terminal to the target wave making system is exclusive, realizes safe permission isolation and flexible switching of independent control and joint control of the deep and shallow water wave making systems in a multi-user environment, and avoids overstepping operation and instruction conflict.

The utility model relates to the technical field of respiratory training, and particularly discloses a multi-mode respiratory training device which comprises a training device mechanism and a multi-mode mechanism assembled on the top of the training device mechanism. The training device mechanism comprises a shell, a vent hole is formed in one side of the shell, a rotating rod is rotationally installed at the top of the shell, a windmill is connected to the top of the rotating rod, a plurality of fan blades distributed in an annular array mode are connected to the periphery of the rotating rod, and the fan blades are located in the shell and correspond to the vent hole. A butt joint port is formed in the top of the shell; the multi-mode mechanism comprises a rotating seat rotationally mounted at the top of the shell, and a small-caliber breathing nozzle, a duckbilled breathing nozzle and a large-caliber breathing nozzle which correspond to the butt-joint ports are connected to the rotating seat; the breathing training device can be conveniently and flexibly switched according to different training modes, the diversity during training is enhanced, and the breathing training effect is effectively improved.

The utility model relates to rust removal technical field, concretely points to a kind of handheld steel electric derusting tool, including electric mainframe, its end has pivot, drive mainframe drives pivot rotation;Dual-mode polishing mechanism, including the mounting bracket fixed in pivot end and the multiple groups of strip steel brush distributed in the peripheral side of mounting bracket;Strip steel brush can be installed posture adjusted on mounting bracket, such as horizontal installation or vertical installation;When carrying out horizontal installation, multiple groups of strip steel brush form plane polishing brush;When carrying out vertical installation, multiple groups of strip steel brush form roller polishing brush.Compared with the mode that traditional different form tools are used respectively, the scheme integrates multiple polishing functions in the same handheld tool, reduces the number of tools, facilitates carrying and operation, and improves work efficiency.

The utility model discloses a two -seat sofa relates to furniture field, and its technical scheme main points are: including base, the both sides fixedly connected with handrail board of base, be equipped with two block cushion on the top surface of base, and the cushion is located between two handrail boards, and the sliding connection with baffle is established on the top surface of base, and the baffle is located between two block cushion, and the both sides of baffle all are set up and accommodate the accommodating groove of accommodating support plate for the baffle, and the detachable connection with support block for the cushioning under support plate is established on handrail board, when support block is located under support plate, and support plate horizontal and its top surface with the top surface of handrail board flush. The utility model discloses through the support plate that can unfold on baffle and the support block on handrail board, realized the flexible switching of single person / double -person mode, has kept the intimitiy of double -person use, solved the problem of the insufficient support of single -person use, and the support structure of normal state under concealment keeps sofa appearance simple and beautiful.

The application belongs to the chip packaging technical field, and particularly relates to a running control method based on a heterogeneous optoelectronic chip, steps of which are as follows: S101, obtaining a task quantity of a to-be-calculated task; and judging whether the task quantity is greater than a set first calculation threshold; when the judgment result of step S101 is yes, then step S102 is executed, that is, a type one photonic chip is recommended for the to-be-calculated task to execute calculation; when the judgment result of step S101 is no, then step S103 is executed, that is, a recommended calculation time consumption of the to-be-calculated task is obtained, and whether the recommended calculation time consumption of the to-be-calculated task is less than a set time length is judged; when the judgment result of step S103 is yes, then step S104 is executed, that is, a type two photonic chip is recommended for the to-be-calculated task to execute calculation; when the judgment result of step S103 is no, then step S102 is executed. The control method can realize flexible switching and stable high-speed running of the optoelectronic chip in an extreme environment.

This invention discloses a shear force distribution demonstration device and measurement method, belonging to the field of structural engineering teaching technology. The device includes a base, a support mechanism, a loading mechanism, a demonstration mechanism, and a measurement mechanism. The support mechanism is a frame structure with sliding rails; the loading mechanism has replaceable supports with switchable constraints; the demonstration mechanism uses replaceable vertical columns with four-jaw chuck sleeves; and the measurement mechanism includes a strain measurement module, an S-shaped tension sensor, and a positioning ruler. This device adopts a fully modular, quick-release design, allowing for rapid switching between series and parallel systems, column constraint forms, and parameters. It simultaneously demonstrates the core knowledge points of inter-story force transmission in series and intra-story force distribution in parallel, verifying the shear force distribution law through measured data. This invention is easy to operate, combining visualization and quantitative measurement, effectively solving the pain points of abstract and difficult-to-understand traditional teaching methods, and significantly improving teaching effectiveness.

This invention discloses a sensor calibration device and method based on three-dimensional pressure decoupling. It solves the problem that traditional impact calibration devices can only provide impact loads in a single direction and cannot simulate the complex stress state of sensors under the combined action of normal pressure, tangential pressure and confining pressure in real working conditions. This invention uses multiple three-dimensional decoupling components with adjustable tilt angles and a standard force sensor at the bottom to accurately decompose the single axial impact force provided by systems such as drop hammers into normal and tangential forces acting on the sensitive surface of the pressure sensor to be calibrated. Combined with the confining pressure provided by the three-dimensional pressure chamber, it can simultaneously reproduce the multi-dimensional stress state of the pressure sensor in a real soil and rock environment in one system, realizing the performance calibration of one-dimensional sensors under multi-dimensional force coupling.

This utility model discloses an adjustable drop test device for metal components, belonging to the technical field of drop test devices. The adjustable drop test device for metal components includes a support base, on the top of which are mounted a vertical drop test component, a spill drop test component, and an adjustable drop impact platform component. The vertical drop test component includes four guide rods fixed to the top of the support base. This utility model, by setting up a horizontal vertical drop test component and a spill drop test component, uses the guide rods as a base and a lifting mechanism to adjust the height of the placement base, combined with a limiting structure to achieve a vertical free fall of the component, thereby simulating drop scenarios at different heights. The spill drop component allows the metal component to be thrown in a parabolic trajectory, recreating an accidental drop. Therefore, this device can simulate both vertical and spill drop scenarios of metal components, solving the problem of the limited functionality of existing drop test devices and improving its practicality.

The utility model discloses a remote control camera lifting device, which belongs to the technical field of photographic equipment and comprises a disc lifting base, an electric push rod, a mounting bracket, a comprehensive signal transmission device, a pan-tilt camera body, a hole top universal wheel and a quick release component, the electric push rod is installed at the circle center of the top of the disc lifting base, the installation support is installed at the output end of the electric push rod, the comprehensive signal transmission device is installed in the installation support, the pan-tilt camera body is installed at the top of the installation support, and the hole top universal wheels are arranged at the bottom of the disc lifting base. The quick release assembly is installed on the top of the disc lifting base. The problem that in the prior art, when mobile shooting and fixed shooting are switched, universal wheels need to be disassembled repeatedly, operation is tedious and time-consuming, and consequently shooting efficiency is low is solved. The system improves the stability and shooting efficiency of equipment, and is suitable for professional image scenes which need to be quickly arranged and have variable environments.

This utility model belongs to the field of balance scooter technology, specifically relating to a locking device and a unicycle. The locking device is electrically connected to a hub motor, which is installed under the scooter body. The locking device includes a processor installed inside the scooter body; a control panel installed on the top of the scooter body, the control panel integrating a display screen, an input module, and a switch, the display screen, the input module, and the switch being electrically connected to the processor; and a sensor assembly electrically connected to the processor. The switch has several preset input positions. The switch and the processor are configured to control the hub motor to enter the locking state in a preset mode when the hub motor is in the unlocked state. This utility model has the advantages of flexible switching between multiple locking modes, improved operational convenience, and abnormal state alarms.

The invention relates to the technical field of electric energy metering boxes, in particular to a modular electric energy metering box which comprises a box body, a storage plate is movably arranged on the box body, a storage groove is formed in the storage plate, the storage plate can move to the position below the box body, and an opening of the storage groove faces upwards. And the storage plate can also move to the upper part of the box body and is arranged on the top wall of the box body. The storage plate is arranged to be of a structure capable of moving to the position below or above the box body, so that an operator can flexibly adjust the position of the storage plate according to actual requirements, and the functionality of the storage plate is improved.

The utility model relates to lighting device technical field, concretely relates to a modularization quick detachable lamp, include: lamp body, be provided with the chassis in the lamp body, be provided with module connecting element on the chassis, be provided with electrical interface on the module connecting element, be equipped with at least one functional module placement position on the chassis, functional module placement position is detachably installed with functional module through mechanical fixed structure, module connecting element is detachably connected with at least one functional module through electrical interface. The mechanical fixed structure is quick detachable connecting structure. Be provided with the mounting ring on the chassis, the mounting ring is detachably connected with the light source module matched therewith through the screw knob structure. Therefore, provide a modularization quick detachable lamp to solve the problem of the difficulty of buying new lamp or refitting original lamp when having different function demand to the lamp in the prior art.

The invention discloses a variable-diameter fruit and vegetable picking end effector based on a three-fold paper folding structure. The variable-diameter fruit and vegetable picking end effector comprises a support, a paper folding grabbing mechanism and a cutting mechanism. The support is used for being connected with the tail end of a mechanical arm. The folded paper grabbing mechanism comprises a Mipu paper folding structure and a picking driving mechanism for driving the upper layer or / and the lower layer of the Mipu paper folding structure to unfold or fold; the three-source paper folding structure comprises multiple groups of three-source paper folding units arranged on the connecting frame, the multiple groups of three-source paper folding units are curled along the central axis, and the head-to-tail adjacent three-source paper folding units are mutually connected to form a cylindrical structure for wrapping fruits and vegetables to be grabbed; by means of the arrangement, the variable-diameter fruit and vegetable picking end effector can achieve lossless grabbing of fruits and vegetables in the fruit and vegetable harvesting process, has the advantages of being light in structure, high in fruit shape adaptability, soft in grabbing and flexible in operation, can be widely applied to automatic picking scenes of various fruits and vegetables, and is better in practicability and universality.

The utility model discloses a welding tooling applied to dissimilar materials relates to welding technical field, including the carrier plate for bearing copper material and aluminum material, and the carrier plate is provided with the fixture for fixing copper material and aluminum material two position, the welding tooling still includes the water tank of can accommodate carrier plate and make the cooling liquid can immerse the welding area between copper material and aluminum material, and the spray assembly of the fixed or movable mode to the welding area spray cooling liquid is selected. The utility model discloses through setting up the carrier plate of bearing copper material and aluminum material and fixed clamp, can ensure two kinds of to be welded material to keep stable relative position in the welding process, avoid because of the misplacement of welding thermal stress or mechanical disturbance, and the water tank of can accommodate carrier plate and make the cooling liquid immerse the welding area is integrated simultaneously, and the spray assembly of optional fixed or movable mode, make the tooling have the double function of whole immersion cooling and spray cooling.

The utility model discloses a heavy-current switch with a protection function, which comprises a heavy-current switch body, a switch button, a switch shell and a switch bottom shell are arranged on the heavy-current switch, and a spring, a driving contact, a gear shifting sheet, a side conducting copper sheet and a central copper sheet are arranged in the switch button, the switch shell and the switch bottom shell in a matched manner. The large-current switch body is small in size, simple in structure and good in stability, still has good stability after being used for a long time, and the large-current switch also has the advantages that the large-current switch body is simple in structure and good in stability, and the large-current switch body is convenient to mount and dismount. The reinforcing structure of the switch enables the switch to bear passing of large current for a long time and still keep good safety performance, and meanwhile, when the switch is connected with the large current which cannot be borne for a long time, the switch is automatically switched off, and the switch is automatically protected.

This utility model discloses a library lending cart, including a frame and a cart bed fixedly connected inside the frame. A transmission rod is movably connected to the inside of the cart bed via bearings. A support plate is fixedly connected to the surface of the transmission rod, and a connector is fixedly connected to the top of the support plate. Books are inserted into the inner side of the connector. The support plate can tilt and swing the connector around the transmission rod as an axis. A transmission structure is provided on the left side of the frame, which can control the rotation of a shaft. The transmission structure includes a pedal movably connected to the left side of the frame via a pin. This utility model avoids page compression and bending caused by traditional stacking by using a vertical connector to insert books, reducing the damage rate. The tilting and swinging design arranges books in a stepped pattern, with exposed spine labels, facilitating quick identification of type and quantity by administrators. Furthermore, the linkage mechanism between the transmission rod and the support plate allows for flexible switching between book storage and display states.

This disclosure provides a method, computer device, and distributed monitoring system for detecting loitering. The method includes: acquiring scene image frames of a scene in real time; identifying scene information based on the scene image frames to obtain a loitering warning mode matching the scene information; the scene information includes target object information in the scene, and the target objects include individuals or groups of a specified type in the scene; identifying / inferring the existence state of target objects within a detected area in the scene image based on the acquired scene image frames in real time; and executing a loitering detection strategy matching the loitering warning mode on the target objects existing in the detected area to obtain a loitering detection result. This disclosure achieves flexible switching of loitering warning strategies in multiple scenarios by automatically matching the monitoring scene with the loitering warning mode, thereby better adapting to the differentiated needs of different scenarios for loitering detection technology.

The utility model discloses a double-body foldable underwater explorer, which relates to the technical field of underwater operation auxiliary equipment and comprises a floating body component, a platform, an underwater operation cabin, a positionable connecting mechanism, a lifting adjusting mechanism and a control component. The underwater operation cabin is detachably connected with the floating body assembly through the positionable connecting mechanism, the underwater operation cabin can keep the underwater preset depth under the action of the positionable connecting mechanism, and the lifting adjusting mechanism is installed on the platform, connected with the underwater operation cabin in a matched mode and used for driving the underwater operation cabin to ascend and descend so as to switch the operation state and the navigation state. The control assembly is installed on the platform or the floating body assembly. The floating body assembly bearing platform is adopted and matched with the independent underwater operation cabin, underwater preset depth fixing of the operation cabin is achieved through the positionable connecting mechanism, safety and comfort are improved, and production and assembly difficulty and transportation and storage cost are greatly reduced by being detachably folded and matched with the portable wheel set.

The utility model relates to large -scale steel structure welding mobile type operation platform, including support base, operation platform, ladder structure and lifting assembly, the lifting assembly includes cross bar and control assembly, wherein: Cross bar installs on support base, Control assembly rotationally sets up on cross bar, and bottom can extend downward to make universal wheel from ground, Control assembly includes pivot, support leg and spacing cylinder, wherein: Pivot passes through cross bar and is connected with rotation, Support leg is with pivot's bottom screw joint, Spacing cylinder installs on cross bar, and spacing cylinder and support leg sliding connection, the utility model discloses through the control of lifting assembly, can make universal wheel from ground when operating, will platform fixed in the operation position, promotes the operation security, after the operation, can make universal wheel ground, the platform moves conveniently, realized the flexible switching of mobile and fixed function, improved the use convenience of platform.