28results about How to "Consistent speed" patented technology

This application belongs to the field of carbon fiber tube manufacturing technology, and discloses a carbon fiber tube centrifugal forming manufacturing system and process. The carbon fiber tube centrifugal forming manufacturing system includes a mold assembly and a centrifugal drive assembly. The mold assembly includes a module frame, individual frames, and mold components. The module frame is detachably connected to several individual frames, and the individual frames are detachably connected to several mold components. The mold components include a tubular mold with external hexagonal sleeves at both ends and detachably connected plugs at the ends. The centrifugal drive assembly includes a housing, a motor, and a platform. The housing and motor are mounted on the platform. A gear set inside the housing enables the motor to drive the external internal hexagonal sleeve to rotate. The internal hexagonal sleeve and the external hexagonal sleeve are inserted and engaged to drive the tubular mold to rotate and achieve centrifugal forming. This application solves the pain points of existing equipment and processes, such as poor versatility, cumbersome operation, low forming accuracy, and limited efficiency, through synergistic optimization of structure and process.

This utility model discloses a speed measuring device for a centrifugal pump and the centrifugal pump itself. The centrifugal pump has a pump shaft, and the speed measuring device includes a bearing cover, a clamping ring, and a speed measuring probe. The clamping ring is fixed to the pump shaft and can rotate synchronously with the pump shaft. Multiple speed measuring adapters are spaced apart along the circumferential direction on the clamping ring. The bearing cover includes a cover body that is integrally shaped as a rotating body. A receiving cavity for accommodating the clamping ring is formed inside the cover body. A first mounting hole and a second mounting hole communicating with the receiving cavity are provided on the side wall of the cover body. The first and second mounting holes are asymmetrically spaced along the circumferential direction. The speed measuring probe is installed in the first and second mounting holes and has a monitoring end facing the speed measuring adapter of the clamping ring. This application achieves precise installation of the speed measuring probe through structural innovation of the bearing cover and clamping ring, improving the stability and measurement accuracy of the speed measurement signal, while also adapting to the existing structure of the centrifugal pump and improving installation convenience.

The present application relates to a kind of multi-unmanned aerial vehicle narrow airspace cooperative path planning method based on distributed optimization, comprising the following steps: establishing the three-dimensional kinematic model of unmanned aerial vehicle, and defining narrow airspace boundary constraint;According to task demand, generate reference path for each unmanned aerial vehicle;Design distributed optimization controller based on local information;With reference path as tracking reference, use distributed optimization controller to solve control input vector in real time, to control the actual flight path of unmanned aerial vehicle.The method of the present application can realize completely distributed control, eliminate single point failure risk, and can ensure that unmanned aerial vehicle is collision-free and maintains desired formation, realizes speed consistency, improves cooperative efficiency.

The utility model discloses an adjustable splitting machine for sheet electrolytic copper foil, which comprises a base, a driving part and a splitting part, the base is provided with a support frame arranged at the top of the base, the driving part is arranged at the top of the base and is provided with a connecting frame arranged at the top of the support frame, a driving roller is transversely and rotatably arranged in the connecting frame, and the splitting part is arranged at the top of the driving roller. The slitting part is arranged on the side face of the driving part and provided with a moving frame arranged on the side face of the connecting frame in a sliding mode, a gear a is rotationally arranged in the moving frame and connected with the driving roller in a meshed mode, and a slitting roller is transversely and rotationally arranged at the bottom of the moving frame. By arranging the slitting part, synchronous driving and accurate slitting of the slitting rollers can be achieved, through meshing transmission of the driving roller and the gear a, it is guaranteed that the rotating speeds of the slitting rollers are consistent, copper foil stretching or tearing caused by the rotating speed difference is avoided, and meanwhile the slitting width can be rapidly adjusted according to the product specification through the modular design.

This invention provides a pipe hot-press welding fixture, belonging to the field of pipe welding technology. It includes a base, with a fixed mold and a fixed box fixedly connected to both ends of the top of the base. Horizontal shafts are symmetrically fixed between the fixed mold and the fixed box. A first moving mold and two second moving molds are slidably connected to the two horizontal shafts. Each of the fixed mold, the first moving mold, and the second moving molds is equipped with a locking ring and a two-drive assembly, which drives the two second moving molds to move. This invention uses an angle adjustment component to adapt the support angle according to the actual tilt angle of the pipe, replacing the rigid fixed support structure of existing hot-melt butt welding machines. This effectively avoids gravity shift or deformation caused by the lack of adaptive support when the pipe is tilted due to its high material flexibility, ensuring that the pipe joints to be welded are always accurately aligned. This prevents uneven stress on the pipe and uneven heating of the molten area during welding, significantly improving the sealing performance of the pipe.

This application discloses an image sensor, which includes a pixel array, a control module, and a data line. The pixel unit in the pixel array includes a first pixel circuit, a second pixel circuit, and a row selection transistor. The first pixel circuit and the second pixel circuit in the pixel unit are connected to the data line through the same row selection transistor. The first pixel circuit is connected to a shared pixel unit through a reset transistor, and the second pixel circuit is connected to the shared pixel unit through a reset transistor. The control module is used to output a target control signal to control the delay in entering the charge clearing stage when the pixel row including the pixel circuit completes quantization control. This ensures that the time or speed at which the image sensor establishes reset nodes between different pixel rows is kept as consistent as possible during row-by-row quantization, thereby enabling the image sensor to complete quantization better.

The application relates to the technical field of coiling and coning machines, and particularly discloses a radar cover workpiece coiled plate forming mechanism and method, which comprises a base and a processing box; a driving motor is arranged in the processing box; an upper coning roller is rotatably arranged outside the processing box; a lower coning roller is rotatably arranged outside the processing box and cooperates with the upper coning roller to form a processing gap for processing a plate; a hydraulic lifting mechanism is arranged above the processing box and connected with the upper coning roller; a transmission assembly is in transmission connection with the driving motor and the upper coning roller; a friction powder supply mechanism is arranged on the processing box; wherein the friction powder supply mechanism comprises a release amount adjusting assembly which is mechanically linked with the hydraulic lifting mechanism and used for automatically adjusting the output amount of the friction powder according to the change of the roller spacing. The application realizes three-roller synchronous transmission under single-motor driving, continuous transmission during roller spacing adjustment and self-adaptive matching of the friction powder supply amount.

The utility model relates to the technical field of glass production and processing, and discloses a glass conveying device which comprises a base and a mounting seat, one end of the mounting seat is hinged to the base, a driving part is hinged to the base, an output shaft of the driving part is hinged to the mounting seat, the driving part can drive the mounting seat to incline, and a driving unit and a conveying mechanism are arranged on the mounting seat. The driving unit can drive the conveying mechanism to rotate, and the conveying mechanism is used for conveying glass. According to the technical scheme, the cleaning efficiency of the etching liquid can be improved, and secondary corrosion of the etching liquid to the surface of the glass is reduced.

The utility model provides a kind of positioning device for automobile seat support machining belongs to automobile seat technical field, the positioning device for automobile seat support machining has two side plates, side plate is fixedly installed on rack, and the push plate for driving seat material vertical movement is equipped on side plate, and the positioning assembly for clamping seat material is equipped on push plate;Push plate is "ten" cross structure, and the longitudinal plate of push plate left and right sides, two groups of mobile assemblies symmetrically arranged relative to transverse plate are symmetrically arranged;Positioning assembly includes the transverse groove A of transversely arranged that the transverse plate of push plate is opened and the longitudinal groove B of longitudinally arranged that longitudinal plate is opened, and two synchronous clamping plates of clamping are slidably connected in groove B and groove A place;The utility model is used to solve the positioning consistency of existing clamping mechanism to same specification seat support material, cannot ensure that all same specification material is accurately fixed in uniform reference position, prone to material deviates from the preset machining center problem, to further lead to low processing efficiency.

This utility model discloses a speed synchronization guide roller device for tension control of a coating machine, used for the synchronous rotation of the paper web at both edges and the center. It includes a first bearing seat, a second bearing seat, a cylindrical guide roller, and a central rotating shaft. The guide roller is a cylindrical structure with semi-circular ribs on its inner wall, and is coaxially mounted on the central rotating shaft. The two ends of the central rotating shaft are rotatably mounted on the first and second bearing seats via two symmetrically arranged bearings. The surface of the guide roller has two symmetrically arranged spiral grooves centered on the centerline of the roller and along its axial cross-section. The guide roller is integrally made of aluminum alloy, reducing the weight of the entire roller by more than half, effectively reducing weight resistance during operation, effectively solving the problem of asynchronous rotation between the paper and the guide roller, effectively preventing material accumulation and inability to rotate at the edges of the guide roller, and effectively improving coating production efficiency.

The invention relates to the technical field of textile fabric detection, in particular to a defect detection device for textile fabric processing, which comprises a rack, a first conveying roller assembly and a second conveying roller assembly, the first conveying roller assembly comprises a first top conveying piece rotationally arranged at the top of the rack and a first bottom conveying piece rotationally arranged at the bottom of the first top conveying piece. The second conveying roller assembly can slide along the rack and is matched with the linkage control of the elastic supporting piece, the photoelectric proximity switch and the metal plate induction piece, the fabric tension degree can be automatically adjusted, the moving speed of the fabric is kept consistent with the rotating speed of the conveying rollers through the transmission fit of the driving motor and the conveying rollers, and the fabric tension degree can be automatically adjusted. The fabric between the first conveying roller set and the second conveying roller set is always in a proper tensioning state, wrinkles caused by fabric looseness are avoided, and the defect detection accuracy is further improved.

The utility model provides a triangular conductive wire self-driven single-face tin pick-up structure, the structure comprises a pay-off wheel, a correction wheel set, a tin pick-up wheel, a traction wheel and a take-up wheel in sequence, the lower surface of the tin pick-up wheel is immersed in the surface of tin liquor, and the pay-off wheel, the correction wheel set, the traction wheel and the take-up wheel are all located above the surface of the tin liquor. The tin pick-up wheel is provided with a V-shaped groove, namely a wire groove with a V-shaped section, the section shape of the V-shaped groove is suitable for the section of a triangular conductive wire to be subjected to tin pick-up so that only the bottom face of the triangular conductive wire can make contact with tin liquid, the correction wheel set at least comprises a flat groove wheel, and the flat groove wheel is provided with a flat groove, namely a wire groove with a horizontal bottom face. According to the utility model, the triangular conductive wire entering the tin pick-up wheel is ensured not to turn over through the correction wheel set, so that the problem that the conductive wire turns over in the single-side tin pick-up process of the triangular conductive wire is solved.

This utility model belongs to the field of metallurgical engineering, specifically a rapid cooling sintering structure, including a machine body. A cooling mechanism is installed inside the machine body, and a transmission frame is fixedly installed inside the machine body. Several first rotating shafts are rotatably connected inside the transmission frame, and a transmission belt is mounted on the surface of the several first rotating shafts. By setting up the cooling mechanism, a high-efficiency heat exchange channel is formed by symmetrically penetrating the sintered ore layer with dual airflows, thereby increasing the cooling intensity. Furthermore, the symmetrical airflow coverage eliminates the temperature gradient caused by unilateral cooling, achieving uniform heat dissipation of the workpiece cross-section and avoiding deformation and cracking caused by thermal stress concentration. By setting up a transmission component, a single power source drives two cooling spiral blades to operate synchronously, while rigid transmission ensures that the speeds of the two fans are completely consistent, improving the uniformity of airflow coverage and eliminating cooling blind spots caused by asynchronous airflow.

The utility model relates to electronic injector technical field, propose a controllable needle length handheld electronic injector, including casing, push needle linkage assembly, clamping assembly, injection assembly, push injection motor assembly and illuminator, the inside one end of casing fixedly connected interactive component, the inside lower fixedly connected mainboard assembly of casing, the inside fixedly connected push needle linkage assembly of casing middle part, the upper fixedly connected clamping assembly of push needle linkage assembly middle part, clamping injection assembly above clamping assembly, the lower fixedly connected push injection motor assembly of clamping assembly right side, the utility model discloses the adjustment needle length motor, transmission screw rod and linkage mechanism in setting needle length adjusting assembly, can accurate control the displacement of sheep horn fork, thereby realizes the continuous, accurate adjustment of needle length, sets up the needle power of fast, constant stroke of electromagnet component, ensures the depth and speed of every needle, is not influenced by artificial factor, improves operation standardization and effect reliability.

This utility model discloses an anti-cavitation device for a desulfurization pump. This utility model relates to the field of desulfurization pump technology. The anti-cavitation device includes: a pump body; an anti-cavitation component fixedly connected to the outer wall of the pump body; a motor fixedly connected to the outer wall of the pump body; the anti-cavitation component includes an impeller baffle; a first impeller is fixedly connected to one side of the outer wall of the impeller baffle; and a second impeller is fixedly connected to the other side of the outer wall of the impeller baffle. Holes are formed in the walls of both the first and second impellers, and the holes are arranged in ascending order of size along the outer wall of the first impeller. This anti-cavitation device, through the linearly distributed holes of varying sizes on the impellers, can change the flow field characteristics inside and around the impellers, suppress bubble generation, appropriately reduce the centrifugal force during impeller rotation, make the pressure distribution at the impeller inlet more uniform, and reduce the occurrence of cavitation.

The application relates to the field of optical fiber manufacturing equipment, in particular to a heating device for an optical fiber fusion processing platform. The device comprises a fusion and stretching structure, which comprises a fixed sleeve connected to the middle part of the processing table and a stretching sleeve slidingly arranged at the two ends of the fixed sleeve; the middle part of the fixed sleeve is provided with a fusion cavity; the fusion cavity is provided with a heating and fusion structure; the stretching sleeve is provided with a traction and flow guide structure; the traction and flow guide structure can horizontally pull the optical fiber through the traction end, so that the optical fiber can be butt-jointed before fusion and stretched after fusion; the traction and flow guide structure can guide the air circulation in the fusion cavity through the flow guide end, so that the optical fiber can be cleaned before fusion and cooled after fusion; the positions of the traction end, the flow guide end and the heating and fusion end are staggered. Through linkage control of the components, the application realizes the full-process automation and intellectualization of the optical fiber from feeding, centering, cleaning, fusion, stretching to annealing, cooling and discharging, and improves the quality stability and production efficiency of the optical fiber fusion processing.

This invention discloses a high-precision synchronous laser tube cutting device for machining machine tool components, relating to the field of laser processing equipment technology, including a stripper plate and a core drive assembly. This high-precision synchronous laser tube cutting device for machining machine tool components can simultaneously achieve precise positioning of the cutting length of a round tube and automatic tilting and unloading after cutting using a single electric cylinder drive. During the feeding stage, the electric cylinder drives the slider to make the adjustable baffle at the top of the gantry abut against the end of the round tube to achieve length positioning. The adjustable baffle can flexibly adjust its axial extension length via adjusting bolts, quickly adapting to different cutting length requirements without replacing components. After cutting, the electric cylinder pulls the slider along the guide rail. On one hand, the gantry drives the adjustable baffle to synchronously disengage from the end of the round tube, releasing the length limit; on the other hand, by converting linear motion into the swinging motion of the right support, it drives the support roller to tilt towards the stripper plate, allowing the cut round tube to naturally tilt and unload.

The invention discloses a controllable cavitation polishing strengthening device for the inner surface of a deep hole of a bearing and a machining method. An ultrasonic cavitation vibration ring drives a magnetic powder storage ring to vibrate synchronously, a divergence angle cavitation nozzle sprays outwards-expanded jet flow downwards, the spirally-flowing jet flow induces cavitation primary generation when passing through the ultrasonic cavitation vibration ring, and the gas content of the jet flow is increased; the magnetic powder storage ring hole is vibrated out and entrained in jet flow, the spiral wall-attached jet flow preferentially acts on the inner surface of the upper portion of the deep hole, and polishing and strengthening of the upper portion of the deep hole are achieved; the spiral wall-attached jet flow continuously extends to the middle part along the hole wall, so that the polishing strengthening process is continuously expanded from the upper part to the middle part; when the spiral wall-attached jet flow is spread downwards to the lower portion of the deep hole, the direct jet flow sprayed out of the cavitating nozzle without the divergence angle conducts fluid compensation on the lower area of the deep hole, shearing and disturbance are formed by the direct jet flow and the spiral wall-attached jet flow above the direct jet flow, polishing and strengthening of the lower area of the deep hole are enhanced, and the electromagnetic coil enables magnetic powder to keep stable movement speed at different axial positions. And polishing and strengthening integration is achieved.

The embodiment of the invention provides an extrusion die head and an extrusion die for manufacturing an aerosol generating product, and the extrusion die head comprises a first seat body with a plurality of discharging channels and adjusting valves in one-to-one correspondence with the discharging channels; the regulating valves are respectively arranged at the corresponding discharging channels; and each regulating valve is used for regulating the flow of the corresponding discharging channel by regulating the opening degree. By adopting the extrusion die head provided by the embodiment of the invention, the forming quality can be improved.

The utility model relates to the field of glass bottle production, in particular to a bottle wiping machine which comprises a machine frame, a conveying chain which moves annularly is arranged on the machine frame, vertical bottle inserting rods are evenly fixed to the top of the conveying chain, the bottle inserting rods are used for inversely inserting glass bottles, a bottle wiping roller is arranged on the machine frame along the conveying chain, and a water tank is arranged below the conveying chain. The water tank communicates with a water pump, the water pump communicates with a spray pipe, and the spray pipe is provided with an electromagnetic valve and used for spraying water to the bottle wiping roller. The bottle wiping machine can solve the problems that in the prior art, a spraying function is achieved through compressed air, so that the bottle wiping machine is limited in movement, water is inconvenient to add into a water tank, and pipelines are disordered.

This utility model relates to a multi-motor vibratory box for pile drivers, belonging to the technical field of pile driver equipment, and solves the technical problems of large load and severe heat generation in traditional vibratory boxes with gear transmission. It includes a vibratory box body, a drive motor, and at least one pair of eccentric block assemblies. Each eccentric block assembly includes a rotating shaft, eccentric blocks fixedly mounted on the shaft, and a synchronous gear. Each rotating shaft is equipped with a drive motor, and the meshing synchronous gears rotate in opposite directions. The drive motor provides the main driving force for the rotation of the corresponding eccentric block assembly; the synchronous gears do not transmit the main driving force. The drive motor is a bidirectional hydraulic motor, and the rotation direction is controlled by controlling the flow of hydraulic oil. By driving the corresponding eccentric block assembly to rotate through an independent drive motor, the synchronous gears only serve a synchronizing function, significantly reducing the heat generation of the vibratory box, avoiding component aging and wear caused by high temperatures, and extending the service life of the equipment.

This utility model relates to the field of pulverized coal injection machine technology and discloses a pulverized coal injection machine feeding device, including a base plate, a shock-absorbing bracket fixedly installed on the base plate, and a dual-outlet pneumatic feeder fixedly installed on one side of the base plate. The dual-outlet pneumatic feeder contains an impeller. This pulverized coal injection machine feeding device uses a single power source (a fan controlled by a frequency converter) to drive feeding, grinding, and injection. Compared to traditional pulverized coal injection machines with multiple power sources, energy consumption can be reduced by more than 35%, effectively reducing production costs. Simultaneously, the simplified structure reduces the number of components, making installation simpler and troubleshooting easier during maintenance, shortening maintenance time by 80%. This reduces downtime due to maintenance, improves production efficiency, and ensures that the fan speed matches the grinding speed, making the grinding process more stable and improving the uniformity of injection, which is beneficial for the complete combustion of fuels such as coal and improves combustion efficiency.

The utility model belongs to the technical field of battery preparation, and particularly relates to a compression roller device for assisting in testing the peel strength of a pole piece, which comprises a placing table, a compression roller mechanism and a driving mechanism, the compression roller mechanism is arranged on one side, in the first direction, of the placement table and can be in contact with the sample in the first direction; the driving mechanism can drive the compression roller mechanism to reciprocate in the second direction; compared with the prior art, the compression roller device disclosed by the utility model has the advantages that the pressure and the rolling speed in the pressing process of a test sample can be kept consistent, and the detection precision of the peeling strength of a pole piece is ensured.

This invention relates to the field of uncoupling robot technology, specifically to a railway shunting uncoupling robot system based on radar-visual fusion and force feedback collaboration. The system includes a main moving base, a secondary moving base mounted on a slide rail on the upper side of the main moving base, a robotic arm mounted on the upper side of the secondary moving base, a first servo motor mounted on the free end of the robotic arm, a lever mounted on the output shaft of the first servo motor, a detection plate mounted on the edge of the first servo motor end, an adjustment cavity within the detection plate, and a slotted hole communicating with the adjustment cavity on the lower side of the detection plate. A slider is slidably mounted in the middle of the adjustment cavity, and the slider abuts against both ends of the adjustment cavity via two first springs. Distance sensors are mounted at both ends of the adjustment cavity. A first clamping block and a second clamping block, connected to the slider, are positioned opposite each other on the lower side of the detection plate. This invention solves the problem in existing technologies where, during uncoupling operations when the carriage is running at low speed, the uncoupling robot is prone to collisions with the carriage, resulting in damage.

The utility model relates to the technical field of intelligent mechanical energy storage power generation systems, and discloses an electric hydraulic rotating speed control device, which comprises a hydraulic tank, a hydraulic motor and a rotating speed control disc, a hydraulic pipe splitter is connected onto the hydraulic tank, and a plurality of groups of connecting hoses are hermetically communicated onto the hydraulic pipe splitter; the rotating speed control disc is connected with the shaft end of the generator, a brake pad installation frame is installed on the outer side of the rotating speed control disc, and a second hydraulic hose connector communicated with the connecting hose in a sealed mode is installed on the brake pad installation frame. Compared with the prior art, the utility model has the advantages that the brake pads are controlled by uniformly controlling the rotating speeds of the three generators through the electric hydraulic pump, and three pipelines output by the electric hydraulic pump are connected with the pipeline butt-joint ports of the three brake pad mounting racks, so that the rotating speeds of the speed change devices of the three generators are controlled to be synchronous and consistent; the electric hydraulic pump is uniformly started or stopped by the intelligent control system according to the rotating speed requirement.

The application relates to a material tower taper detection technical field, in particular to a material tower core mold taper part radius real-time determination structure and a winding forming system and method, a wire wheel is arranged on a pull rod, the top end of the pull rod is fixedly connected with an outer rod, the inner side of the outer rod is slidably connected with an inner rod, the inner rod can abut against the surface of the taper part upwards, the bottom end of the inner rod is a piston, a second spring is fixedly connected between the piston and the inner side of the outer rod, a potentiometer is fixedly connected on one side of the inner rod, a fixed block is fixedly connected on the inner side of the top end of the outer rod, the fixed block slides on the potentiometer, the real-time radius of the winding position of the taper part is obtained by obtaining the position of the fixed block on the potentiometer, the pull rod moves rightwards under the driving of a lead screw, the wire wheel moves rightwards synchronously, winding movement is realized, the outer rod bends to one side, so that the middle surface of the inner rod and the wire wheel is in the same plane, and the real-time radius of the winding position of the taper part is obtained by obtaining the position of the fixed block on the potentiometer.

The application discloses an active type butt welding assembly with small friction, which comprises a pressing shaft roller core, a large roller, a bottom welding wheel and a tab seat are sequentially connected in rotation along the axial direction, a first rotation connection unit is arranged between the large roller and the pressing shaft roller core, a second rotation connection unit is arranged between the bottom welding wheel and the tab seat and the pressing shaft roller core, the bottom welding wheel and the tab seat rotate synchronously, and the whole of the bottom welding wheel and the tab seat rotates independently relative to the large roller. The first rotation connection unit and the second rotation connection unit are arranged, on one hand, the speed of the upper and lower surfaces of the conductive film can be ensured to be consistent, and on the other hand, the speed of the conductive film at the composite current collector and the tab can be ensured to be consistent, so that the speed of the whole conductive film tends to be consistent, the whole conductive film is in a flat and unfolded state during welding, the welding quality is ensured, the defective products are reduced, and the yield is improved.

The utility model relates to the technical field of ink curing degree detection, and solves the problem that the efficiency of testing an ink layer on the surface of an optical fiber is seriously influenced due to over-low frequency of reciprocating motion when the reciprocating motion is carried out by utilizing a lead screw structure. The printing ink curing degree detection device comprises a base, the top surface of the base is fixedly connected with a reciprocating assembly, one end of the reciprocating assembly is fixedly connected with a clamping assembly, the top surface of the base is fixedly connected with a frame, the reciprocating assembly comprises a bottom plate fixedly connected to the top surface of the base, and the bottom surface of the bottom plate is fixedly connected with a driving motor. The output end of the driving motor is fixedly connected with a driving wheel, the side face of the driving wheel is sleeved with a transmission belt, one end of the transmission belt is sleeved with a driven wheel, the driving wheel and the driven wheel both penetrate through the bottom plate and are both fixedly connected with a quarter gear, the side face of the quarter gear is meshed with a transmission rod, and the two ends of the transmission rod are both slidably connected with supporting plates. The supporting plates are fixedly connected to the two ends of the base respectively.