47results about How to "Reduce longitudinal impact" patented technology

The invention discloses a car bumper provided with an energy absorption and pedestrian protection device. Collision energy is dispersed and consumed by adopting a rhombus-shaped mechanism and a damping unit; and the rhombus-shaped mechanism is used for transmitting energy in a collision process into a transverse direction so as to reduce the vertical impact force between a pedestrian and a car body. Meanwhile, the deformation of the rhombus-shaped mechanism can provide a certain safe buffering distance for the collision process to prolong the collision contact time and reduce the magnitude of collision force. The energy decomposed by the rhombus-shaped mechanism is transmitted to the damping unit, and the kinetic energy is converted into heat energy through the relative movement of the damping unit; and finally, the collision energy is consumed. Therefore, the collision force can be decomposed, the collision energy is consumed, the collision contact time is prolonged, the stress of people and the car in the collision process is improved, and further, the safety of people and the car is protected to the greatest extent.

The invention provides a manual coupling buffer structure. The manual coupling buffer structure comprises buffers (3), two clamp rings (21) and two traction rods (40). Notch grooves are formed in the clamp rings (21), and connecting necks (42) are formed in one ends of the traction rods (40); and the clamp rings (21) are mutually connected with the connecting necks (42) on the inter-adjacent traction rods (40) in a clamped mode through flange parts located on the two sides of the notch grooves, every two clamp rings (21) are connected in series through connecting bolts (6) and fixedly connected with the traction rods (40) to form a whole body, and the buffers (3) are connected at the free ends of the traction rods (40). By utilizing the manual coupling buffer structure, the longitudinal impact between vehicles can be alleviated, when the mutual coupling state between the vehicles needs to be removed, an operating worker only needs to disassemble the connecting bolts with the help of a simple auxiliary tool, and then disconnection between every two adjacent vehicles can be achieved; and the manual coupling buffer structure has the outstanding advantages that the structure is simple, operation is convenient, the coupling reliability is high and the implementation cost is low.

The invention discloses a depressed center flat car for urban rail vehicle maintenance, and relates to the technical field of rail vehicles. The depressed center flat car comprises a chassis, a wind braking device, a manual braking device, an electrical device, a vehicle coupler buffering device and a bogie, wherein the electrical device arranged on the end part of the chassis comprises an illuminating element and a power source of the illuminating element; the chassis comprises an end beam, a sleeper beam, a drawing beam, grids, a floor, a lower cover plate and two opening covers or more; the drawing beam of a knife-holder-type hollow frame structure comprises a dovetailed external end part, a middle part and a bending part; the dovetailed external end part is connected with the vehicle coupler buffering device; the middle part is connected with the sleeper beam; the bending part is connected with the grids; the lower end surface of the middle part is higher than lower end surfaces of the external end part and the bending part; each of the sleeper beam, the drawing beam and the grids is internally and vertically provided with web plates at intervals. The depressed center flat car disclosed by the invention has the advantages that the features of simple structure, convenience in use, large loading capacity, high overall strength, high applicability and the like are obtained; the flat car is suitably applied to the operation on standard gauge lines, and is mainly used for the maintenance of subway rail lines; cargoes loaded by the flat car are equipment mainly used for maintaining the subway rail lines.

The invention discloses a side wall supporting structure and a hopper car. The side wall comprises a connecting beam and two supporting units; each supporting unit comprises a side wall supporting plate and a reinforced beam fixed to one side of the side wall supporting plate; the edge of the side wall supporting plate far away from the reinforced beam is in an arc shape matched with the inside radian of the side wall plate; the reinforced beams of the two supporting units are connected by the connecting beam; and the two side wall supporting plates are spaced by a certain distance. Many defects in the prior art are overcome and the advantages of reducing the self weight and improving the space utilization rate and the reliability are realized.

A wave suppressor for a railroad tanker relates to tankers used for conveying liquids, and is particularly used in the tanker. The wave suppressor comprises swash plates and a mounting seat, wherein the mounting seat is fixed on the inner wall of the tanker; the swash plates are fixed on the mounting seat. The wave suppressor is mainly characterized in that the swash plates are fixed on two sides of the mounting seat at equal intervals in a fence-shaped manner; the middle, in the length direction, of each swash plate is convex to form a cap top; brims are arranged on two sides on the lower edge of the cap top to form a cap-shaped structure. The wave suppressor has the benefits that the cap-shaped structure of the swash plate meets the movement regularity of hydromechanics, so as to reduce longitudinal impact and regurgitation force of a liquid in the tanker effectively, effectively overcome the defects of non-uniform stress on the conventional swash plates suffering from fluid impact and non-uniform overflow, reduce longitudinal impact on a sealing head of the tanker, ensure running safety and prolong the service lives of the swash plates.

The embodiment of the invention discloses a supporting device for tunnel excavation, and relates to the field of tunnel supporting equipment. The supporting device mainly aims to solve the problem that an existing supporting device for tunnel excavation is poor in shock resistance, the supporting device comprises a movable supporting part and a fixed supporting part, and a main body part is arranged in the fixed supporting part; the supporting device further comprises a first buffering mechanism, a second buffering mechanism and a third linkage assembly, the movable supporting part drives a first linkage assembly to slide along the surface of the fixed supporting part through longitudinal movement of a longitudinal movable part, and longitudinal impact force, from an earthquake, borne by the movable supporting part can be weakened; and a guide rail part can drive one end of a linkage part to transversely move along the guide rail part, longitudinal impact force borne by the movable supporting part can be converted into transverse supporting force for the fixed supporting part through the first linkage part, and a transverse moving part drives a second linkage assembly to rotate and slide along the main body part through transverse movement of the transverse moving part, and transverse impact force, from an earthquake, borne by the movable supporting part can be weakened.

A bridge anti-seismic support comprises a beam bottom embedded steel plate and a padstone top surface steel plate, a support upper steel plate is fixedly connected with the beam bottom embedded steel plate through an upper anchor rod, a support lower steel plate is fixedly connected with the padstone top surface steel plate through a lower anchor rod, the support upper steel plate is located on the inner side of the support lower steel plate, and a cavity is defined by the support upper steel plate. The cavity is filled with the transversely-placed middle buffering energy-absorbing block, the support lower steel plate and the support upper steel plate are oppositely arranged in the opposite directions, the side face of the support lower steel plate and the side face of the support upper steel plate are oppositely arranged, and the space between the side face of the support upper steel plate and the side face of the support lower steel plate is vertically filled with the peripheral buffering energy-absorbing block. The buffer energy-absorbing block can effectively prevent rigid damage of seismic waves to the bridge. The bridge anti-seismic support guarantees the stability of a bridge, is safe, reliable, high in buffering capacity and large in absorbed energy, has the advantages of being easy to manufacture and convenient to install, and has high practicability.

The invention relates to the technical field of durian picking, and discloses a harvesting device capable of preventing durians from being damaged during picking. An outer-layer funnel is movably connected to the interior of a storage funnel, impact reduction mechanisms are arranged at the two sides of the outer wall of the outer-layer funnel, and each impact reduction mechanism comprises a chuteand a buffer rotating rod; the chutes are formed on the outer wall face of the outer-layer funnel, inner rotating shafts are movably sleeved with the buffer rotating rods, and the two ends of each inner rotating shaft are fixedly connected to the wall faces of the two sides of the corresponding chute. According to the device, the impact reduction mechanisms and longitudinal buffering mechanisms are arranged to be matched with the outer-layer funnel, and a closing baffle is matched, so that the durians can be prevented from falling off from the interior of the outer-layer funnel; and after thedurians fall in placing grooves and can be taken out through a discharging channel, so that the situation that the durians fall to hit collecting personnel can be avoided while the durians are prevented from being damaged during collecting, and the safety of the collecting personnel is improved while the collecting quality of the durians is guaranteed.

The invention discloses a car bumper provided with an energy absorption and pedestrian protection device. Collision energy is dispersed and consumed by adopting a rhombus-shaped mechanism and a damping unit; and the rhombus-shaped mechanism is used for transmitting energy in a collision process into a transverse direction so as to reduce the vertical impact force between a pedestrian and a car body. Meanwhile, the deformation of the rhombus-shaped mechanism can provide a certain safe buffering distance for the collision process to prolong the collision contact time and reduce the magnitude of collision force. The energy decomposed by the rhombus-shaped mechanism is transmitted to the damping unit, and the kinetic energy is converted into heat energy through the relative movement of the damping unit; and finally, the collision energy is consumed. Therefore, the collision force can be decomposed, the collision energy is consumed, the collision contact time is prolonged, the stress of people and the car in the collision process is improved, and further, the safety of people and the car is protected to the greatest extent.

Disclosed are a pressure regulating method and system for a concrete pumping device and a concrete pumping device, wherein the system comprises a constant pressure pump (1), a pressure sensor (2) for acquiring a pumping pressure value and the change of rate in the pumping pressure, a pressure regulating valve (4) connected to the constant pressure pump (1) and for regulating the distributing pressure output by the constant pressure pump (1), a controller (3) connected between the pressure sensor (2) and the pressure regulating valve (4) and for receiving the pumping pressure value and the changing rate in the pumping pressure obtained by the pressure sensor (2) and for controlling the degree of opening of the pressure regulating valve (4) according to the pumping pressure value and the changing rate in the pumping pressure, and an oscillating oil cylinder (6) connected to the constant pressure pump (1) and for obtaining the distributing pressure output by the constant pressure pump (1) and a pressurized oil from an energy reservoir (5) so as to obtain a reversing pressure for urging a distributing valve. The present solution can achieve, by means of intelligently regulating the distributing pressure output by the constant pressure pump, reduced longitudinal impact on the whole vehicle during a distribution reversing, so as to prolong the service life of hardware devices and save energy.

A lightweight open wagon special for transporting ores comprises a wagon body steel structure, a wagon hook buffer device, a steering frame and a brake device. The wagon body steel structure comprises a bottom frame, lateral walls and an end wall. The bottom frame comprises a tail device mounting seat, an auxiliary crossbeam, an auxiliary longitudinal beam, a sleeper beam, a middle beam, a large crossbeam, a small crossbeam and a steel floor. The bottom frame without an end beam and a lateral beam, the lateral walls and the end wall are connected through integral full-steel welding to form an integral stress frame structure. Slag-preventing plates are disposed at the connection of the end wall and a lateral wall, the connection of the end wall of the bottom frame and the connection of the lateral wall of the bottom frame. The lightweight open wagon has the advantages that the end beam and the lateral beam of the bottom frame of a traditional open wagon are omitted, weight of the open wagon is effectively lowered while load capacity of the same is increased, the main bearing part of the wagon body is made of high-strength weather-resisting steel, strength margin and corrosion resistance of the parts of the open wagon are increased, and the service life of the open wagon is prolonged; wagon hooks conforming to AAR standards and a large-capacity rubber buffer are utilized to effectively increase the impact load bearing capacity of the open wagon.

The invention relates to an H infinite robust control method for mode switching of a composite power split hybrid power system, comprising an engine start-up and an engine torque switching phase. In the engine startup phase, the engine torque of the first and second electric machines and the torque change when the first brake is turned on are determined by using dynamic programming and H infiniterobust control method. The output shaft of the engine is accelerated by the power split hybrid system under the premise that the torque at the power output end changes steadily and continuously. Whenthe engine speed reaches the idle speed, the engine ECU issues the fuel injection ignition command, the engine starts to output the torque, completes the engine torque switching, and enters the powersplit hybrid mode. Compared with the prior art, the invention can suppress the torque control error caused by the parameter perturbation and the torque fluctuation of the system in the mode switchingprocess, and realize the optimal comprehensive performance such as the switching time, the smoothness of the mode switching process, the vehicle power performance, the brake sliding friction work andthe like.

The invention provides a three-direction multi-stage energy absorption device for a railway vehicle and belongs to the technical field of passive safety of rail traffic vehicles. A screw with an anti-creeper penetrates through through-holes of two bosses and an induction ring in the center of a single-hole pushing block. The two ends of four supporting arms are hinged to pushing blocks through bolt pins to form a support of a parallelogram structure. The back end face of each pushing block is provided with a turnup groove and one induction ring and fixedly connected with first energy absorption pipes. The back end face of each pushing block is provided with one turnup groove. Each first energy absorption pipe, each second energy absorption pipe and each third energy absorption pipe are each provided with a cutting head, wherein each cutting head is axially embedded in one end of another energy absorption pipe. Inner rings of the cutting heads are in threaded connection with small endsof cutting shafts combined with the cutting heads correspondingly, cutter mounting seats and W-shaped cutters are arranged at the end faces of the cutting heads, and sharp knives of the W-shaped cutters are located in induction grooves. The cutting shafts are stepped shafts, and the lateral surfaces of the cutting shafts are provided with the induction grooves and threads at intervals. The three-direction multi-stage energy absorption device for the railway vehicle is used for passive safety of the vehicle.