5results about How to "Avoid flick" patented technology

The invention discloses a Fluent-based numerical simulation and experimental design method for shaking of liquid in a tank of a tank truck, and belongs to the technical field of numerical simulation of fluid dynamics (CFD). The method includes the steps that the hole opening position of the wave-proof plate serves as an independent variable, multiple hole opening position schemes are designed, liquid shaking related indexes are determined to serve as dependent variables, a geometric model is established according to the actual structure of a tank truck tank body, a fluid mechanics model and boundary conditions are set, a solver is configured, output parameters and numerical simulation initial values are set, and an experiment is executed. The liquid shaking process of a certain swash plate trepanning scheme is simulated, acting force data, namely shaking index data, between liquid shaking and the inner wall of the tank body is recorded, the advantages and disadvantages of each trepanning position scheme are evaluated based on the shaking index data, and the optimal scheme is determined. According to the method, a real object experiment is replaced by CFD numerical simulation, parameter setting is carried out, the experiment cost and the experiment risk are remarkably reduced, the experiment efficiency is improved, and data support can be provided for industry design.

A rear swing arm structure of an electric scooter comprises a pedal rear side portion, a telescopic shock-proof unit, two swing arm units, two first connecting rods and a second connecting rod, one end of each swing arm unit is pivoted to the pedal rear side portion, one end of each first connecting rod is movably pivoted to the telescopic shock-proof unit, and the other end of each first connecting rod is movably pivoted to the second connecting rod. The other end of the first connecting rod is movably pivoted to the second assembling base, and the two ends of the second connecting rod are pivoted to the swing arm unit and the first connecting rod respectively. When the rear wheel is subjected to vibration impact force, the swing distance of one end of the first connecting rod is automatically and correspondingly matched with the swing distance of the rear wheel assembling part of the swing arm unit, namely, the shock absorption action stroke length of the telescopic shock absorption unit, and the degree of vibration of the rear wheel is automatically and correspondingly matched according to various sliding states and different road surfaces of the scooter. The shock-absorbing buffer force is balanced, too hard or too soft is avoided, the shock-absorbing comfort is improved, drifting, slipping, turning and lateral bending during sliding can be avoided, the road holding force can be increased, and the operation smoothness of the scooter and the safety of sliding on the road can be integrally improved.

The application discloses a caster device and a foldable handcart frame. The caster device comprises a frame body and a pair of caster mechanisms. The first caster mechanism comprises a wheel frame and a caster. The caster is rotatably connected to the wheel frame and has a horizontal rotation axis. The wheel frame is rotatably connected to the frame body and has a vertical rotation axis. The vertical rotation axis is spaced from the horizontal rotation axis. The caster mechanism is provided with a limiting mechanism. The limiting mechanism limits the rotation of the wheel frame around the vertical rotation axis between two limiting positions. The rotation range defined by the two limiting positions is 180 degrees. The first caster mechanism at the two limiting positions is parallel to the advancing direction. The limiting mechanisms of the two first caster mechanisms limit the rotation range of the wheel frame to be symmetrical to the axis of the advancing direction. The application has the following advantages: not only can it advance and retreat, but also has controllability to adapt to steering; the packaging size is reduced, the packaging cost is reduced, and the transportation cost is reduced.

The present invention discloses a rear axle steering system with pressure shock prevention and a control method thereof, including symmetrically arranged left and right tires, a left steering oil cylinder for outputting hydraulic power to drive the left tire to rotate, a right steering oil cylinder for outputting hydraulic power to drive the left tire to rotate, a steering valve group including a proportional valve and a back pressure valve, an oil return port T1 communicating with an oil return port T through a back pressure valve, an oil inlet P of the steering valve group communicating with a pressure oil source, an oil return port T of the steering valve group communicating with a system oil return or with an oil return port of a hydraulic oil tank, and a working oil port A and a working oil port B of the steering valve group communicating with a left steering oil cylinder and a right steering oil cylinder of a vehicle, respectively, for controlling the extension and retraction of the left steering oil cylinder and the right steering oil cylinder. The present invention improves the rigidity of the rear axle steering system by adding a back pressure valve, improves the steering stability of the vehicle when driving on a curve, and avoids the problem of tail swinging caused by excessive steering of the rear axle when the vehicle turns rapidly at high speed and with heavy load.

This invention relates to the field of interventional medical devices and precision fluid control technology, specifically to an auxiliary device for catheter and guidewire processing in an interventional catheterization lab. It comprises a mechanical actuator, a data acquisition module, a pneumatic adjustment module, and a controller. The system, through the cooperation of a fluid drive unit and a flexible variable boundary unit, utilizes a spiral flow channel to transform the fluid into a spiral jet with axial thrust. Its core principle is to use a fluid medium as the sole power medium, replacing traditional solid-mechanical contact. This invention completely eliminates the physical damage to the guidewire's micron-level hydrophilic coating caused by roller clamping, effectively ensuring the integrity and lubrication performance of the interventional device.