11results about How to "Easy to maintain stability" patented technology

The invention discloses a momentum wheel self-balancing vehicle control system based on linear active disturbance rejection control. The momentum wheel self-balancing vehicle control system comprises a speed ring PI controller and a vertical ring LADRC controller. The speed ring PI controller is electrically connected with the vertical ring LADRC controller, and the vertical ring LADRC controller is electrically connected with the momentum wheel self-balancing vehicle; wherein the upright loop LADRC controller comprises a linear expansion state observer, a differential tracker and a control input signal end; in linear active disturbance rejection control, a controlled object is regarded as an integral series-connection type system, and a part, different from the integral series-connection type system, in an actual system is regarded as total disturbance; the total disturbance is regarded as the expansion state of the system, a linear expansion state observer is designed to observe the total disturbance, then the total disturbance is compensated to a control input signal end of a controlled object, and the target of reducing the influence of a parameter change part is achieved. The control method has the characteristics that the control precision is high, the inclination angle swing amplitude is smaller and the torque fluctuation is smaller when the self-balancing trolley recovers to the vertical balance state, and the like.

This invention belongs to the field of ship maintenance technology and discloses a ship's internal corner maintenance door, including a maintenance door body and a ship hull. A baffle is rotatably connected to the top of the maintenance door body, a locking assembly is provided at the top of the maintenance door body, a locking assembly is slidably connected inside the maintenance door body, a pressing assembly is movably connected inside the maintenance door body, and a sealing assembly is fixedly connected to the bottom of the pressing assembly. This invention facilitates the quick locking or opening of the maintenance door by setting the locking assembly and locking block and other structures. By pulling the handle, the handle moves the sliding push plate, which in turn pushes the first and second moving frames to move and unfold through the rotating push rod. By setting the pressing assembly and sealing assembly and other structures, the connection between the maintenance door body and the ship hull is easily sealed. The main airbag is compressed downward by the pressing support plate and the pressing rod.

The invention discloses a variable fulcrum type transfer device, and belongs to the technical field of projectile body carrying, the variable fulcrum type transfer device comprises a transfer trolley, a supporting stand column, a lever component, a variable fulcrum mechanism and a driving mechanism, the bottom of the supporting stand column is connected with the transfer trolley, and the top of the supporting stand column is hinged to the lever component. The weight of the heavy object is converted into rolling friction force through the wheels at the bottom of the transfer vehicle, and the driving force of operators during transfer is reduced; through the arrangement of the variable fulcrum structure, the driving force for hoisting the heavy object is further greatly weakened, and the driving mechanism is arranged for the variable fulcrum structure, so that the arrangement of the variable fulcrum structure does not influence the up-and-down rotary motion of the lever component and the hoisting of the heavy object, and the driving mechanism is simple to control and can be operated only by pulling a driving rope. The variable fulcrum type transfer device is easy to operate and control, driving force of operators during transfer is greatly reduced, physical strength is greatly saved, and transfer can be achieved only by one person.

The utility model discloses a portable pre-hospital emergency infusion support. The portable pre-hospital first-aid infusion support comprises a support, the outer surface of the support is rotatably connected with four supporting blocks, the inner wall of each supporting block is slidably connected with a moving block, the inner wall of each moving block is in threaded connection with a first threaded rod, a first worm wheel can be driven to rotate by rotating a first worm, and a second worm wheel can be driven to rotate by rotating a second worm. A movable block can be driven to move through rotation of the first threaded rod, so that the position of the movable block can be adjusted according to the terrain, the stability of the support during infusion is conveniently kept, a supporting block is rotated upwards, and when the supporting block rotates, a limiting body can be driven to move upwards through a limiting rod; and then the limiting body can be reset through the elastic force of the spring, so that the supporting block can be fixed to the outer surface of the support, the supporting block can be stored, the occupied space of the device is reduced, and the effect of being convenient to carry is achieved.

The utility model discloses an assembled anti-pollution curtain device, including a plurality of be used for the partition curtain of stopping pollution, be used for providing the float of buoyancy and be used for providing the locating block of counterweight, both sides of partition curtain all are equipped with the connecting strip, and the connector is equipped between two partition curtains, and both sides of connector all are equipped with the clamping slot, and the connector is connected to two adjacent partition curtains through clamping into the connecting strip at the clamping slot, and the float is equipped with the connecting sheet for being detachably connected with partition curtain. The utility model discloses the connector and connecting sheet are connected to two adjacent partition curtains, to realize the assembled use of anti-pollution curtain, so after the partial breakage of it, can through the dismounting and replacement of the partition curtain of corresponding area, to realize the maintenance and repair of anti-pollution curtain, and because the partition curtain is detachably connected between the float and connecting sheet, so the maintenance of partition curtain only needs to replace itself, to reduce the maintenance cost of anti-pollution curtain.

This invention relates to a method for forming large-size thin-plate ceramics, a forming mold, and the ceramic itself, belonging to the field of ceramic material forming technology. The method includes: filling, floating film floating, pressurization, depressurization-demolding-depressurization, and isostatic pressing steps. The depressurization-demolding-depressurization step includes: gradually depressurizing the upper pressure head while retaining a pre-set pressure; demolding, keeping the sample clamped between the upper and lower pressure heads, and lowering the floating mold until the sample is completely removed; and secondary depressurization: slowly reducing the pre-set pressure to zero, and retracting the upper pressure head to its initial position after leaving the sample. This invention effectively solves the problems of easy cracking, uneven density, difficult demolding, and easy deformation and damage during isostatic pressing of large-size thin-plate ceramics during the forming process, thereby enabling the preparation of high-quality, high-density, and uniform large-size thin-plate ceramic products.

The utility model discloses a lake ecological floating island planting base plate which comprises a base plate body, and planting pots are arranged on the two sides of the surface of the top of the base plate body. According to the base plate, plants are planted in the planting pots on the base plate body, floating objects in a lake can be blocked through the protection frame, the situation that the floating objects on the water surface are struck to the upper surface of the base plate body by river water and consequently green plants planted in the planting pots are damaged is avoided, and therefore the green plants in the planting pots can be protected; wherein electric telescopic rods on the two sides of the surface of the top of the base disc body are opened, the electric telescopic rods drive push blocks to move, the push blocks drive a protective net to move while moving, and therefore the distance position between a protective frame and the protective net can be adjusted; and the height position of the protective net can be adjusted according to the actual use condition, and the adaptability of the protective net can be improved.

The utility model discloses a conveying roller cleaning device for a glass tempering furnace, which comprises a glass tempering furnace body, and through holes are formed in the surfaces of the two sides of the glass tempering furnace body in a penetrating manner. According to the glass tempering furnace, glass is placed on the conveying rollers on the fixing frame, the conveying rollers are driven by the motor to rotate, then the glass can be conveyed and processed through the glass tempering furnace body, and after the glass is processed and the glass tempering furnace body is cooled, the baffles on the surfaces of the two sides of the connecting opening are opened, so that the glass tempering furnace body is cooled. The cleaning brush is driven by the electric push rod to move, when the cleaning brush abuts against the conveying roller, the conveying roller is driven by the motor to rotate, the conveying roller can be automatically cleaned by using the cleaning brush, cleaned impurities fall into the scrap collecting box, and the impurities can be collected by using the scrap collecting box. Therefore, the conveying rollers can be cleaned conveniently, and follow-up normal use of the conveying rollers can be kept conveniently.

The utility model discloses a hinge installation auxiliary mechanism for furniture cabinet door production relates to furniture assembly technical field, aims at solving current cabinet door manual installation easy angle, influences finished product use effect's technical problem, including auxiliary mechanism and clamping mechanism, the auxiliary mechanism installs in the side of cabinet body opening, the cabinet door is equipped with in cabinet body front part, the auxiliary mechanism is by first rod body and second rod body composition, first rod body and second rod body front side recess rotate and install the body of turning, first rod body and second rod body outer end all are fixed with the pressure seat, the clamping mechanism is installed on the body of turning, the clamping mechanism is by the clamping plate composition, the clamping plate is L -shaped folding design, and the clamping plate folding part bottom is equipped with the locating end, the locating end upside is equipped with the antiskid pad, the clamping plate and locating end composition three -sided angle. The utility model has the advantages of auxiliary assembly calibration hinge position, ensure cabinet door installation and use quality, avoid angle.

The utility model discloses a cultivation frame for ecological restoration in the grassland industry, which comprises supports, a fixing plate is arranged between the supports, rollers are mounted on two sides of the bottom surface of the fixing plate, a partition plate is arranged above the fixing plate, and electric telescopic rods are mounted on two sides of the bottom surface of the partition plate. According to the plant cultivation device, plants needing to be cultivated are placed in the cultivation grooves in the placement seats, then the plants can be cultivated, the motor drives the second rotating rod to rotate, the second rotating rod drives the first rotating rod to rotate through the belt wheel set while rotating, the placement seats on the first rotating rod and the second rotating rod are made to rotate, and therefore the plants can be cultivated conveniently. Therefore, the angle position of the cultivation groove in the placement seat can be automatically adjusted, the photosynthesis of plants in the cultivation groove is improved, the sunlight utilization rate of the plants in the cultivation groove can be effectively improved, the plants in the cultivation groove grow more vigorously, and the cultivation effect of the plants is improved.