284 results about "Self adjusting" patented technology

An implement holster comprising a holster support, a first cradle attached to the holster support, a second cradle, and a resilient strap system connected between the holster support and the second cradle, the first cradle fitting within the second cradle. The implement holster further comprises a clip adapted for attaching the holster to a support, a rotator connected between the clip and the holster, and a detent system permitting the holster to be held in a plurality of different positions with respect to the clip.

The invention discloses an electric fascia gun self-adaptive to mechanical strength, and belongs to the technical field of electric fascia guns, the electric fascia gun self-adaptive to mechanical strength comprises a main body mechanism used for relaxing fascia of a patient part or a part needing to be relaxed, and the main body mechanism is provided with a self-adjusting mechanism for adjusting huge strength according to different pressing strength. The self-adjusting mechanism comprises a fixing cylinder fixedly installed in the fascia gun shell. By means of a mechanical self-adjusting mechanism, the pressing force of the hand of a user is directly converted into the impact strength of the operation tail end in real time, when the user presses down forcibly, the displacement of the outer sliding sleeve pushes the sliding column to move outwards without delay through the inclined groove plate and the lifting conical head, the eccentric distance of a transmission system is increased, and the transmission efficiency is improved. The stroke and the impact force of the operation tail end are linearly increased, accurate force feedback can be provided according to different body parts and muscle states, the poor relaxation effect caused by insufficient force is avoided, and damage possibly caused by excessive impact in a sensitive area is also prevented.

The application discloses a mechanical arm cable assembly method and system, and relates to the technical field of robot vision perception and control, and comprises the following steps: acquiring point cloud data of a working environment; fitting a cable center line according to the point cloud data and determining a relative pose matrix of a cable terminal and a target slot; determining an initial alignment attitude matrix of a mechanical arm end according to the relative pose matrix, so as to obtain initial joint angles of the mechanical arm and use the initial joint angles as a starting point of an assembly action; after selecting a grabbing point on the cable center line and planning an insertion path, entering an insertion stage from the starting point; according to detection of an insertion force and an insertion direction, performing error calculation and compensation until the insertion force change rate and the end pose error meet a set condition, and then determining that the assembly is completed. The application realizes self-perception, self-judgment and self-adjustment flexible assembly, improves assembly precision and robustness, and is suitable for automatic grabbing, guiding and insertion operation of flexible cables in industrial automation production.

The invention discloses a mechanical arm cable assembly method and system, and relates to the technical field of robot visual perception and control, and the method comprises the steps: obtaining the point cloud data of a working environment; fitting a cable center line according to the point cloud data and determining a relative pose matrix of the cable terminal and the target slot; an initial alignment attitude matrix of the tail end of the mechanical arm is determined according to the relative pose matrix, and an initial joint angle of the mechanical arm is obtained through solving and serves as a starting point of the assembly action; after a grabbing point is selected on the center line of the cable and a plug-in mounting path is planned, starting to enter a plug-in mounting stage from a starting point; and error calculation and compensation are carried out according to detection of the insertion force and the insertion direction, and it is judged that assembly is completed until the insertion force change rate and the tail end pose error meet set conditions. Self-sensing, self-judging and self-adjusting flexible assembling is achieved, the assembling precision and robustness are improved, and the flexible cable automatic grabbing, guiding and inserting device is suitable for automatic grabbing, guiding and inserting operation of flexible cables in industrial automatic production.

The invention relates to the technical field of agricultural machinery load control, in particular to a corn harvester operation load control system and method, and the system comprises a power extraction module, a speed regulation and control module, a trend analysis module, a parameter optimization module and a load closed-loop module. According to the method, frequency characteristics are extracted in a periodic and segmented mode through header power signals, load dynamic sensing is carried out, advancing speed adjustment is more real-time and prospective, response sensitivity and stability are improved in combination with PID control, equipment stably operates at multiple crop densities and plots, the torque increment of a main shaft is monitored in real time, and wavelet transformation multi-scale analysis is carried out; load fluctuation fine-grained identification is carried out, a roller gap and power output are dynamically adjusted to optimize parameters with a minimum mean square error, frequency and torque characteristic closed-loop comparison is constructed, control self-matching and continuous self-adjustment are carried out, error minimization and trend tracking feedback are fused, the intelligence of the harvester is enhanced, and load sudden change performance fluctuation and energy consumption loss are reduced.

The invention relates to the technical field of bus duct processing, in particular to a full-automatic riveting processing device and method for a bus duct. Comprising a rack; the transmission module is horizontally arranged on the rack in the long side direction of the rack, and the transmission module is provided with a first guide unit and a second guide unit which can be relatively and horizontally adjusted in a sliding mode; the number of the riveting modules is two, and the two riveting modules are oppositely arranged on the rack in a vertical state; the riveting module is provided with a riveting head capable of riveting the bus duct and the PE layer and a first linear driver capable of controlling the riveting depth of the riveting head; the offset detection module is horizontally arranged on one side of the transmission module in the transmission direction of the transmission module; the offset correction module is horizontally arranged on the rear side of the offset detection module in the transmission direction of the transmission module; according to the automatic riveting device, the riveting depth can be automatically adjusted according to different materials, and the deviated PE plate can be adjusted in real time.

The utility model discloses hoisting equipment for building construction, which comprises a base, a hoisting frame is arranged on the upper side of the base, an electric hoist is arranged at the upper end of the left side of the hoisting frame, a loading frame is arranged at the tail end of a hoisting rope in the electric hoist, and the hoisting equipment further comprises a balance mechanism; the balance mechanism comprises a balance shell, a partition plate, a longitudinal balancing weight, a first electronic level meter, a transverse balancing weight and a second electronic level meter, the balance shell is arranged in the middle of the lower side of the object carrying frame, the partition plate is arranged in the balance shell, and the longitudinal balancing weight is slidably connected into a first dovetail groove formed in the upper side of the partition plate. Through the transmission element and the detection element, horizontal inclination detection and horizontal self-adjustment can be automatically carried out on the hoisting part of the building object, so that the building object is always in a horizontal position in the hoisting process, the hoisting stability of the device on the building object is improved, the process is not limited by factors such as a screw rod, use is convenient, and the hoisting stability coverage range is wide.

The invention provides a temperature control self-adjustment electric actuator, belongs to the technical field of actuators, and solves the technical problems that an existing actuator cannot perform temperature self-adjustment and is poor in heat dissipation effect and the like. Comprising an upper shell and a lower shell, the upper shell and the lower shell are spliced to form an actuator shell, a transmission assembly and a driving motor are arranged in the actuator shell, a temperature sensor is arranged on the driving motor, the end of the transmission assembly extends out of the front side end face of the actuator shell, and a heat dissipation assembly arranged in the left-right direction is arranged in the actuator shell; and a power connection end seat is clamped between the upper shell and the lower shell. According to the invention, stable output can be achieved, it is ensured that the actuator has reliable dynamic response capability, guiding and pre-positioning can be carried out, wrong installation is prevented, alignment is ensured, pressing force is applied in cooperation with a sealing screw pair, clamping surfaces are tightly attached, it is ensured that the structure of the actuator is stable, the opening degree of a shutter and the size of the air outlet cross section of an air collecting cover can be synchronously adjusted, and temperature self-adjustment is achieved.

The application provides a performance function self-adjusting control method for improving the performance of a quad-rotor flight, first constructs a global performance function with self-adjusting capability, sets an infinite initial value to adaptively constrain the tracking error of the quad-rotor unmanned aerial vehicle; then sets a performance indicator function as a dynamic feasibility monitoring benchmark of the quad-rotor unmanned aerial vehicle, monitors and judges the current flight state of the unmanned aerial vehicle in real time; then constructs a segmented continuous auxiliary system to adjust the boundary parameters of the performance function; for the position control layer of the quad-rotor unmanned aerial vehicle, a control law is designed and deployed based on the self-adjusting performance function; in an indoor obstacle environment, the autonomous flight task of the quad-rotor unmanned aerial vehicle is executed in combination with multiple modules, the performance function is automatically adjusted, and the dynamic balance between safety and precision of the trajectory tracking of the quad-rotor unmanned aerial vehicle is realized.

The present application relates to the technical field of crane anti-swing, in particular to a self-adjustable floating crane anti-swing device and its anti-swing method, comprising a mounting frame, a transverse moving mechanism, a longitudinal moving mechanism and two push rods, the mounting frame is installed on a rotating arm, the self-adjustable floating crane anti-swing device and its anti-swing method utilize the principle that the arc-shaped bottom of the ship body can only perform transverse or longitudinal swing most of the time, when longitudinal or transverse swing occurs, through cross-direction high-frequency pushing, the original regular swing is destroyed, the swing of the goods on the ship is no longer regular, the goods can be pulled by forces in multiple directions, the swing amplitude is reduced, and danger is avoided. In order to ensure cross-direction pushing without making the pushing direction the same as the original swing direction, through the action of the two, the switching power is connected with the or when switching direction, same-direction pushing and increased swing amplitude are avoided.

This application relates to a tension control method and apparatus. The method includes: acquiring a first tension of a substrate within a preset range of a take-up and unwinding mechanism; when the first tension exceeds a target first interval, iteratively adjusting the angular velocity of the take-up and unwinding mechanism until the first tension is within the target first interval, obtaining an initial angular velocity; controlling the take-up and unwinding mechanism to rotate according to the initial angular velocity, periodically acquiring a second tension of the substrate within a preset range of the take-up and unwinding mechanism; when the second tension exceeds a target second interval, iteratively adjusting the angular velocity of the take-up and unwinding mechanism until the second tension is within the target second interval; wherein the target second interval is smaller than the target first interval. Embodiments of this disclosure do not rely on sensor data, achieving precise self-adjustment within the system.

The utility model discloses a hydraulic mechanism with a self-adjusting cushion block. The hydraulic mechanism comprises a rack, a hydraulic mechanism body arranged on the rack and the self-adjusting cushion block located below the hydraulic mechanism body. The self-adjusting cushion block comprises a base block, the top face of the base block is a first machining face, a station piece is arranged on the first machining face, the bottom face of the base block is a second machining face, the two sides of the base block are each provided with a limiting sliding block, and the self-adjusting cushion block is in limiting fit with the rack through the limiting sliding blocks and can move along the rack. The limiting sliding block is provided with an oblong hole, and the limiting sliding block penetrates through the oblong hole through a bolt to be connected with the side face of the self-adjusting cushion block. The limiting sliding blocks are arranged at the two ends of the self-adjusting cushion block, the limiting sliding blocks can slide down along the long round holes under the action of the gravity of the limiting sliding blocks, and therefore a limiting structure matched with a rack is formed.

The utility model relates to the technical field of lifting beams, in particular to a stress self-adjusting type lifting beam for aircraft rescue, which comprises an auxiliary lifting beam and a main lifting beam arranged at the upper part of the auxiliary lifting beam, a lifting belt for lifting an aircraft is arranged at the bottom of the auxiliary lifting beam, an auxiliary lifting beam belt is arranged between the auxiliary lifting beam and the main lifting beam, and a first lifting ring is arranged at the bottom end of the auxiliary lifting beam belt. A base is fixedly mounted at the bottom end of the first lifting ring, two pairs of limiting rods which are vertically staggered and used for fixing the first lifting ring are arranged on the outer wall of the base, and mounting boxes which are fixedly mounted on the upper portion of the auxiliary lifting beam and used for containing the first lifting ring are arranged on the outer walls of the two pairs of limiting rods. According to the utility model, the two mounting plates drive the limiting rods to relieve the limitation on the base through the extension and retraction of the electric push rod and the movement of the movable block, so that the auxiliary lifting beam and the lifting belt arranged at the bottom end of the auxiliary lifting beam are freely separated, the manual operation is convenient, and the lifting operation time is shortened.

This application relates to the field of industrial air conditioning, specifically a temperature and humidity gradient sensing-based self-regulating industrial variable frequency air conditioning system. The system includes an outdoor heat exchange unit, a refrigeration unit, a multi-stage air duct delivery unit, a terminal airflow regulation unit, a distributed environmental sensing unit, and a core controller. The outdoor heat exchange unit is coupled to the refrigeration unit via a circulating refrigerant pipeline, and its core function is to exhaust the heat generated by the refrigeration unit to the outdoor environment to cool the circulating refrigerant. The refrigeration unit includes a compressor, a variable frequency drive motor to drive the compressor, and cold air outlets for generating cool air. This system aims to acquire temperature and humidity gradient information for different areas within the factory through a distributed environmental sensing network, and, combined with the system's own operational status data, to perform multi-stage coordinated closed-loop regulation of airflow distribution, airflow direction, and cooling power. This achieves efficient, uniform, and adaptive control of the temperature and humidity field within the factory space, and improves the system's overall energy efficiency and operational stability.

The utility model discloses a sealed reaction kettle capable of automatically opening and closing a cover. The sealed reaction kettle capable of automatically opening and closing the cover comprises a kettle cover, a kettle body and a cover opening and closing device, the kettle cover is arranged on the kettle body in an openable mode, the cover opening and closing device comprises a connecting rod structure and a driving mechanism, the connecting rod structure comprises a static connecting rod and a movable connecting rod, the movable connecting rod is rotationally connected with the static connecting rod, the static connecting rod is fixedly matched with the kettle body, and the movable connecting rod is connected with the kettle cover. The driving mechanism is in transmission connection with the movable connecting rod, the driving mechanism is used for driving the movable connecting rod to rotate, the kettle cover can rotate along with the movable connecting rod to realize cover opening and closing actions, the kettle cover and the movable connecting rod further have rotating freedom degrees, and the movable connecting rod and the kettle cover can relatively rotate within a limited angle range. The movable connecting rod is connected with the kettle cover through the rotating shaft, so that the kettle cover has a rotating freedom degree, the kettle cover and the kettle body can be automatically adjusted to be parallel to the flange surface of the kettle body in the process from beginning to contact to complete closing, and a gap between the kettle cover and the kettle body is as small as possible after the kettle cover is closed.

The utility model discloses a pressure self-adjusting barrel plug for preventing deformation of a steel barrel, which is used for being mounted on a liquid inlet / outlet of a steel barrel cover, the barrel plug comprises a cover plate, a threaded connection part used for being connected with the liquid inlet / outlet of the steel barrel cover is arranged on the peripheral side wall of the cover plate, and a positioning part matched with a tightening tool is arranged on the cover plate. The cover plate is provided with an air pressure adjusting piece used for communicating the interior of the steel drum with the outside, the air pressure adjusting piece is a one-way circulation valve, air outside the drum enters the drum in a one-way circulation mode, and the opening pressure of the one-way circulation valve is configured to be 0.1 Mpa to 0.13 Mpa. The steel drum has the advantages that the probability that the steel drum is likely to sink and deform in the later period after high-temperature grease or chemical liquid is injected into the steel drum can be greatly reduced.

The invention relates to the technical field of winding equipment, and provides curtain cloth production winding equipment and method, and the curtain cloth production winding equipment comprises a cloth guide unit, a winding unit and a self-adaptive adjusting unit between the cloth guide unit and the winding unit; the self-adaptive adjusting unit comprises a fixing frame, a leveling mechanism, a centering mechanism and a pressure adjusting mechanism, wherein the leveling mechanism and the centering mechanism vertically ascend and descend on the front side and the rear side of the fixing frame. The centering mechanism comprises a body and a centering roller which is arranged below the body and axially moves back and forth, the centering roller is of a bidirectional conical structure, and the large-diameter end of the centering roller is located in the left-right center; the leveling mechanism comprises a supporting platform and a leveling roller below the supporting platform. The centering mechanism, the leveling mechanism and the pressure adjusting mechanism are combined to form a parallelogram connecting rod mechanism, along with increase of the outer diameter of the winding roller, the leveling roller is driven to ascend, meanwhile, the centering roller is driven to descend at equal intervals, tension self-adjustment is formed, the ascending leveling roller abuts against the winding material in real time, a wave special-shaped structure can be eliminated, loosening and rebounding can be prevented, and in addition, the structure is simple and convenient. And the centering roller can be used for driving the cloth to be centered to avoid deviation.

The present invention presents a bed lift designed originally for campervans, but with application to other space-limited locations where a temporary bed or other platform is useful. The invention provides for self-adjusting mounts which allow for installation tolerance in a wide variety of potential areas. The platform is stabilized and counterbalanced to allow for safe usage while simultaneously being able to accommodate a generous load capacity. Importantly, the lift mechanism utilizes low friction operation and a pulley system which allows an operator to raise or lower the platform with or without powered assistance.

The utility model provides a slag rake cooling water temperature and liquid level self-adjusting device, which relates to the technical field of steelmaking converters and comprises a cold water inlet pipe leading to the inside of a cooling water tank and a hot water discharge pipe arranged below the side wall of the cooling water tank and communicated with the inside of the cooling water tank, a water inlet valve is arranged on the cold water inlet pipe, and a water discharge valve is arranged on the hot water discharge pipe. The first support is provided with a liquid level sensor, the second support is provided with a thermodetector, the outer wall of the cooling water pool is provided with a control box, and the water inlet valve, the water drainage valve, the liquid level sensor and the thermodetector are all electrically connected with the control box. The cold water inlet pipe is provided with the water inlet valve, the hot water discharge pipe is provided with the water discharge valve, the liquid level sensor is arranged to measure the liquid level, and the thermometer is arranged to measure the temperature of pool water, so that the water inlet valve and the water discharge valve can be automatically controlled by the control box to act, and automatic cold water filling and hot water discharge are realized; and the water level and the water temperature in the cooling water tank are kept stable.

The application discloses a transition box and a TRD wall forming machine cutter box and belongs to the technical field of underground continuous wall forming machines. The transition box comprises a box body which is enclosed by an upper sealing plate, a lower sealing plate, end plates at two ends and side plates at two sides; wherein the width size of the upper sealing plate is larger than that of the lower sealing plate, a plurality of butt joints with different functions are formed on the upper sealing plate and the lower sealing plate, and the arrangement positions of the butt joints on the upper sealing plate and the lower sealing plate are different; and a preset pipeline which connects the butt joints with the same function on the upper sealing plate and the lower sealing plate is arranged in the box body. The upper and lower sealing plates of the transition box are provided with butt joints with different functions, and the preset pipeline is used to realize the up-down conduction of the functional pipeline, thereby solving the adaptation problem between cutter boxes with different models and sizes and the TRD wall forming machine. The guide wheel assembly in the cutter box adopts a self-adjusting lubricating system, mud is prevented from entering the guide wheel assembly under high-pressure working conditions, and the safety and efficiency of construction are ensured.

The invention provides a transport vehicle for the interior of a mine, and relates to the technical field of mine transport vehicles, the transport vehicle comprises a transport vehicle head, a container mechanism facilitating ore transport is arranged on the transport vehicle head, an adjusting mechanism facilitating self-adjustment of the container mechanism is arranged on the transport vehicle head, and the container mechanism comprises an external fixed box and an internal container; the adjusting mechanism comprises a belleville spring, a damper and a first universal spherical hinge. The first universal spherical hinge, the reinforcing connecting rod, the second universal spherical hinge and the balance weight bottom plate are arranged to be matched, so that when the vehicle body transports ore on the rugged road section of the mine, the inner container can be adjusted in a self-adaptive mode by means of the rotation characteristic of the universal spherical hinge and the gravity center traction effect of the balance weight bottom plate; the inner container for loading ores is helped to tend to be in a vertically downward state all the time, shaking of the inner container caused by violent jolting is reduced, the probability of falling of stones is reduced, then the workload of follow-up road surface treatment is reduced, and meanwhile stone waste is reduced.

This utility model discloses a differential self-adjusting multi-cylinder hydraulic synchronization device, involving multiple cylinder synchronization control technology. The utility model includes hydraulic cylinder I, hydraulic cylinder II, and a differential compensation valve. Hydraulic cylinder I and hydraulic cylinder II are equipped with a screw-nut pair for converting the linear motion of the hydraulic cylinder piston into rotational motion. Each screw in the screw-nut pair has a transmission component. The compensation valve core of the differential compensation valve has a relatively rotatable rotating shaft. The rotating shaft has a spline-fitted in-situ transmission component II and a threadedly fitted in-situ transmission component I forming the screw-nut pair. After the axial motion of hydraulic cylinder I and hydraulic cylinder II is converted into rotational motion, it is transmitted to the in-situ transmission components I and II respectively. When there is a displacement difference between the two, there is a speed difference in rotation. This speed difference in rotation enables the rotating shaft to rotate, thereby driving the compensation valve core to move axially, achieving displacement compensation between the two hydraulic cylinders.

The utility model relates to the related technical field of cold chain transportation, in particular to a cold chain compartment temperature self-adjusting device which comprises a compartment body, a control mechanism is arranged in the compartment body, and an adjusting mechanism is arranged in the compartment body. According to the cold chain compartment temperature self-adjusting device, through the arrangement of the control mechanism, in the using process, when the temperature sensor senses that the temperature in the compartment body is high, the control instrument controls the refrigerating machine to work to convey cold air into the compartment body, and meanwhile the draught fan works to pump the cold air at the bottom to the top in the compartment body to be output through the air nozzle; therefore, the temperature in the compartment main body can be quickly reduced, and meanwhile, the temperature in the compartment main body is uniform.

The invention relates to the technical field of tower crane devices, in particular to a self-adjusting tower crane wall attaching rod. The self-adjusting tower crane wall attaching rod comprises a connecting pipe, two adjusting rods and two connecting mechanisms. Each connecting mechanism comprises an outer sleeve, an inner sleeve and a disc spring. When the inner sleeve and the outer sleeve get close to each other, the disc spring is compressed. And the disc springs enable the two adjusting rods to generate a trend of moving towards the middle part of the connecting pipe, so that initial pre-tightening force is provided for the adjusting rods. When the tower body generates lateral displacement due to a wind load or a hoisting effect, the adjusting rod can perform compliant movement under the buffering effect of the disc spring, so that external stress is dissipated, protection is provided for the adjusting rod and the connecting pipe, and the service life of the adjusting rod and the connecting pipe is remarkably prolonged. The invention provides a self-adjusting tower crane wall-attached rod to solve the problem that an existing wall-attached rod is prone to overload damage due to the fact that the length of the existing wall-attached rod is fixed and the existing wall-attached rod cannot effectively adapt to working condition changes.

This utility model relates to the field of coal mine electromechanical transportation technology, specifically disclosing a self-adjusting anti-deviation conveyor device for coal mine electromechanical transportation. It includes: a conveyor belt; an anti-deviation mechanism mounted on the conveyor belt to prevent deviation during transport; and a feeding mechanism mounted on the conveyor belt to crush materials during transport. Through the anti-deviation mechanism, the device can concentrate the transported coal using clamps and baffles, preventing deviation during transport. Additionally, operators can adjust the transport space using a telescopic rod within the adjusting plate, improving the stability of the transport process. The feeding mechanism allows the device to feed materials through a feeding cylinder, which enters the crushing chamber where the coal is crushed, facilitating transport.

The invention relates to the technical field of loading and unloading vehicle equipment, in particular to a reinforcing steel bar loading and unloading vehicle which comprises a vehicle head, a truck chassis, a hydraulic lifting mechanism, a compartment, a conveying mechanism and a position correcting device. The carriage is installed on the hydraulic lifting mechanism, the conveying mechanism is contained in the carriage, and the position correcting device is installed on the carriage. The supporting claws and the self-adjusting magnetic attraction device are arranged on the conveying mechanism, when the reinforcing steel bars are loaded, the reinforcing steel bars can be automatically loaded only by electrifying the conveying mechanism, and the reinforcing steel bars can be regularly arranged in the carriage by installing the position correcting device on the carriage; according to the invention, the hydraulic lifting mechanism is arranged below the carriage, so that when the reinforcing steel bars are unloaded, the rapid unloading of the reinforcing steel bars can be realized only by inclining the carriage at a certain angle.

The invention discloses a method and a device for automatically adjusting the height of a scattered type motor iron core punching sheet. The device is characterized by comprising a material receiving platform mounted in a lower die holder in a liftable manner, and a lifting device for driving the material receiving platform to move to adapt to superposition height adjustment of different silicon steel sheets, the supporting plate is installed on the lower die base, the pneumatic clamping jaw is used for blocking silicon steel sheets which are discharged subsequently after the silicon steel sheets are stacked, and the conveying device is used for conveying the silicon steel sheets outwards after the silicon steel sheets are stacked. The lifting device comprises a bottom plate installed in a waste groove of the punching machine, a lead screw rotatably installed on the bottom plate and a servo motor driving the lead screw to rotate. And the material receiving platform is mounted on the screw rod. The lifting device is used for driving the material receiving platform to move, adjustment is conducted according to the heights of different iron cores, meanwhile, after silicon steel sheets are stacked to the corresponding height, the pneumatic clamping jaw blocks the subsequent silicon steel sheets, and therefore the silicon steel sheets are automatically stacked to the iron cores with the different heights, and the use range is widened.

The utility model relates to the technical field of casting sand screening, in particular to a casting facing sand screening device which comprises a cylindrical shell, the bottom of the shell is a closed bottom and fixedly provided with a motor, vibrators are symmetrically and fixedly installed on the lower portion of the shell, a bottom plate is fixedly installed on a rotating shaft of the motor, and the lower side face of the bottom plate makes contact with the vibrators. The assembly type screening frame is fixedly installed above the bottom plate in a layered mode, the screens are fixedly installed at the inner ring positions of the assembly type screening frame, screen holes of the screens shrink from top to bottom, discharging openings are formed in the positions, located between the screens and between the screens and the bottom plate, of the shell, and all the discharging openings are spirally arranged in a staggered mode. During screening, the assembly type screening frame can be in a sealed state, dust is not raised during screening, the springs play a role in supporting and self-adjusting when the assembly type screening frame vibrates, the assembly type screening frame is kept in a non-planar left-right shaking state when vibrating up and down, and structural blockage caused by vibration is avoided.

The invention relates to a sensitive and self-adjusting detection system for inter-row hoes that comprises a motor (1) with a shaft (2), a sensing rod (3) joined to the shaft (2), and a sensor (5) that determines at least one of the following parameters: speed, rotation, angular position or torque of the shaft (2). The system also includes a control element (10) for varying the position of the sensing rod (3), and a control unit (6) that receives signals from the sensor (5), from the control element (10) and, optionally, from other sensors (8, 9). The control unit (6) processes the signals and allows automatic regulation of the position, sensitivity and dead centre of the sensing rod (3), improving weeding precision and adapting operation to the working conditions of the terrain.