86results about How to "Improve the level of lightweight" patented technology

The invention discloses a vibration isolator with an active vibration absorbing ability. The vibration isolator with the active vibration absorbing ability is provided with a barrel-shaped upper shell, a rubber main spring is blocked in a top end opening of the upper shell, a main spring framework runs through the rubber main spring, a connecting stud is arranged at the top of the main spring framework, and the upper end of the connecting stud is used for connecting with a base body; the vibration isolator with the active vibration absorbing ability is provided with a lower shell connected with the upper shell, a shearing sleeve is fixed on the bottom plate of the lower shell, a column-shaped iron core is supported in the shearing sleeve through a magnetorheological elastomer arranged on the outer circumference of the column-shaped iron core, a magnet exciting coil winds the column-shaped iron core, and the magnetorheological elastomer works in a shearing mode; a magnetic conductive mass block is firmly connected with the iron core; a connecting bolt is arranged at the bottom of the lower shell for connecting with a main vibration object. The vibration isolator with the active vibration absorbing ability is capable of effectively lowering the vibration energy transmitted to the base body from a rotating mechanism, reducing the vibration of related parts of the rotating mechanism and improving the service life thereof.

The invention discloses a white car body frame assembly. The white car body frame assembly comprises a car body frame body, a front end frame and two side wall frames, wherein the front end frame is fixed to the front side of the car body frame body; the two side wall frames are fixed onto the left and right side faces of the car body frame body respectively; the left and right ends of the front end frame are fixedly connected with the front ends of the two side wall frames respectively; the front end frame comprises two upper bending beam upright post reinforced plates; and the two upper bending beam upright post reinforced plates extend from top to bottom respectively to be fixed to the rear sides of corresponding car body upper bending beam upright posts. The white car body frame assembly disclosed by the invention solves the problem that the connection between the upper bending beam upright posts and front longitudinal beams is weak, front face column collision longitudinal beams do not collide, the front face column collision performance is improved, moreover, the rigidity of headlamp mounting points is increased, and the safety of passengers is improved.

The invention discloses a cup-shaped part reverse extrusion molding device and method. The molding device comprise an upper mold plate, a base plate, a reverse extrusion punch, a compression spring, a limiting sleeve, a reverse extrusion barrel, an ejector block, an ejector rod, hydraulic cylinder pull rods and a lower mold plate. The base plate is arranged below the upper mold plate, the bottom of the base plate is connected with the reverse extrusion punch, the reverse extrusion barrel is arranged inside the limiting sleeve, the ejector block is arranged inside the reverse extrusion barrel, the ejector rod is arranged at the bottom of the ejector block, the hydraulic cylinder pull rods are fixed between the reverse extrusion barrel and the lower mold plate, the reverse extrusion punch is of a two-section stepped cylindrical structure, and a three-section through hole is formed in the punch. The reverse extrusion barrel is a barrel-shaped part with an inner cavity being a through hole. The upper portion of the through hole inner cavity is a containing cavity, and the lower portion of the through hole inner cavity is in clearance fit with the ejector block. The lower end of the reverse extrusion barrel is connected with the four hydraulic cylinder pull rods. Each hydraulic cylinder pull rod is of a T-shaped structure, and the reverse extrusion barrel is controlled to move up and down. The friction force between the punch and a blank and the friction force between the blank and the wall of the reverse extrusion barrel are reduced, the equipment service life is prolonged, and the cost is saved.

The invention relates to an upper vehicle body structure optimization method based on an MDO technology, and the method comprises the following steps: 1, building a vehicle body finite element model,and achieving the multidisciplinary performance simulation analysis of a vehicle body; step 2, establishing a parameterized model based on the upper vehicle body joint cavity and the upper vehicle body key sheet metal part thickness as design variables; 3, according to the step 2, building a simulation optimization process based on the upper vehicle body connector cavity and the key sheet metal part material thickness as design variables; 4, performing DOE sampling calculation of each design variable according to the step 3; 5, constructing a response surface approximation model meeting the precision requirement according to the DOE sampling calculation result in the step 4; and 6, according to the response surface approximation model in the step 5, taking the limit value of the multidisciplinary performance index of the vehicle body as a constraint condition, and taking the lightest weight of the vehicle body as an optimization target to carry out optimization design and obtain an optimization scheme. According to the method, the lightweight optimization scheme meeting the multidisciplinary performance requirements of the vehicle body can be quickly found.

The invention discloses an automatic fire extinguishing system for a power battery system of a passenger vehicle and a control method of the automatic fire extinguishing system, and belongs to the technical field of automobile safety fire-fighting. The automatic fire extinguishing system comprises an air conditioner cooling sub system and an automatic fire extinguishing sub system which is connected to the inner part of the air conditioner sub system, wherein the automatic fire extinguishing sub system comprises a controller, a solenoid valve, a sensor, an alarm and a battery pack; the controller processes received signal data, and outputs an instruction according to processed information; the input end of the solenoid valve is connected to the output end of the controller for receiving afire extinguishing signal output by the controller, so that fire extinguishing is started; the output end of the sensor is connected to the input end of the controller for detecting environment data inside battery pack; the input end of the alarm is connected to the output end of the controller for receiving an alarm signal output by the controller, so that alarm is started; and the battery pack is further connected to a BMS. The automatic fire extinguishing system does not occupy extra size, facilities layout, and improves lightweight level of the whole vehicle.

The invention provides a traction power device which comprises a rectifier, a traction inverter and an auxiliary current converting unit; wherein the rectifier is connected with a traction transformer secondary side winding on a train and is used for rectifying single-phase alternating current of the traction transformer secondary side winding into direct current; the traction inverter is used for inverting the direct current into frequency amplitude controllable alternating current to tract a motor; the auxiliary current converting unit comprises a chopper, an medium frequency isolation DC/DC converter, an auxiliary inverter and a sine filter; the chopper is used for regulating the voltage of direct current; the medium frequency isolation DC/DC converter is used for performing medium frequency inverter on direct voltage outputted by the chopper, isolation transforming is performed on the square-wave voltage of the medium frequency, and the square-wave voltage is rectified as low voltage direct current; the auxiliary inverter is used for inverting the low voltage direct current into three-phase power frequency alternating current; the sine filter is connected with the auxiliary inverter and is used for filtering the three-phase power frequency alternating current to generate sine three-phase alternating current for providing alternating current load of the train.

The invention provides an ultra-light high-sound-absorption GMT reinforced PU thermoplastic automotive trim composite board and a preparation method thereof. The composite board provided by the invention sequentially comprises a non-woven film, a GMT reinforcing layer, a non-woven film, a PU foam light plate, a non-woven film, a GMT reinforcing layer and a non-woven film from top to bottom, and the composite board is obtained by thermally compounding the GMT reinforcing layer with a 3D structure and the PU foam light plate which are bonded through the non-woven film, so that the defects of poor rigidity, full sealing, no hole and poor sound absorption in a traditional dry PU board are overcome, and the sound absorption performance and light weight of the PU composite board material are further improved.

The invention provides a light dissimilar steel integral hot formed vehicle door frame preparation method. A vehicle door frame consists of five parts; and according to different mechanical performance requirements, high-strength steel plates with different characteristics are selected. The machining process comprises (1) laser cutting, (2) laser welding, (3) integral hot punching formation and (4) acid washing. The preparation method has the following beneficial effects: dissimilar high-strength steel plate materials are selected, are cut to proper sizes by laser, and are welded by laser forintegral hot punching formation; the overall strength and plasticity of a vehicle front door frame are greatly improved; the rigidity is higher; the deformation resistance and the impact resistance ofthe vehicle door frame are improved; the vehicle safety is improved; the door frame is high in forming precision and low in rebound through hot punching; and needed punching equipment is lower in tonnage. The weight of the vehicle frame is reduced, so that the vehicle lightness level is improved. In addition, the machining process is simple and higher in efficiency, and meets large-batch production requirements of products; and the products are excellent in strength and plasticity and stable in quality.

The invention provides a complex thin wall aluminum alloy stair die casting forming technology. Special software is adopted for conducting the mechanical performance analysis on a complex thin wall aluminum alloy stair structure, then special software is applied to conduct the die casting technology performance analysis on a complex thin wall aluminum alloy stair, the above two steps are repeatedly conducted, interactive iteration is conducted, and dual optimization is conducted. A method of interactive and iterative optimization of the mechanical performance analysis and the die casting technology performance analysis is adopted, and accordingly dual optimization for lightweight and casting forming performance of the complex thin wall aluminum alloy stair structure is achieved. The tread face wall thickness of the aluminum alloy stair obtained through the technology is smaller than or equal to 1.88 mm, the kicking face wall thickness of the aluminum alloy stair obtained through the technology is smaller than or equal to 1.81 mm, and the overall weight of the stair is smaller than or equal to 10.5 kg; after 500-3,000 N of static load, permanent deformation is avoided; and during supporting of the largest inclination angle (35 degrees) under the dynamic load of 500-3,000 N, permanent deformation is smaller than or equal to 2.1 mm, damage is avoided, and the technology level of a die casting product is domestically advanced.

The invention discloses a reinforced body-in-white frame, which comprises a vehicle body front end frame, a lower vehicle body frame, a side wall frame, a top cover frame and a tail frame. The upper portion of the vehicle body front end frame is fixedly connected with the front portion of the top cover frame. The rear portion of the vehicle body front end frame is fixedly connected with the frontportion of the lower vehicle body frame. The rear portion of the lower vehicle body frame is fixedly connected with the front portion of the tail frame. The upper portion of the tail frame is fixedlyconnected with the rear portion of the top cover frame. The longitudinal section of a front buffer beam and the longitudinal section of an energy absorption box of the vehicle body front end frame areboth in a shape like a Chinese character 'mu', and anti-collision supporting plates are arranged in the middle of the front buffer beam and a front end module. According to the reinforced body-in-white frame, the energy absorption capacity of the energy absorption area of the vehicle body front structure in the head-on collision process is increased, the transverse rigidity and the forecabin yawing mode of the vehicle body front structure are improved, the head-on collision safety performance and the force transmission efficiency are improved, the overall strength of the vehicle body frame isimproved, and therefore the riding comfort is improved.

The invention relates to the technical field of automotive steering and discloses a multi-shaft steering system. The multi-shaft steering system comprises a steering gear, a front steering axle, an auxiliary steering axle and a rear drive axle, and also an angular transducer, an electronic control unit and an executer, wherein the angular transducer is mounted beside the steering gear, and the executer is mounted on a tie rod of the auxiliary steering axle; the angular transducer is used for obtaining the steering information of the front steering axle and transmitting the steering information to the electronic control unit; the electronic control unit is used for controlling the executer to work according to the received steering information; the executer is used for driving the tie rod to move from side to side so that the auxiliary steering axle and the front steering axle are turned synchronously. The multi-shaft steering system is simple in structure, and the electrically control assisted steering mechanism of the multi-shaft steering system enables the axle spread arrangement of two steering axles not to be limited by space, and a dual-axle steering synchronization mechanism is completely realized by the electronic control unit and the executer without a connecting rod mechanism.

The invention discloses an electric oil pump assembly, a steering system and a lubricating system. The electric oil pump assembly is provided with a total oil inlet and a total oil outlet, and comprises a motor assembly and an oil pump assembly, wherein the motor assembly is provided with a liquid cooling cavity which is in communication with the total oil inlet, the liquid cooling cavity comprises circulating oil channels, and the circulating oil channels are located between a stator of the motor assembly and a motor shell of the motor assembly; the oil pump assembly is installed at the end part of the motor assembly and is in power coupling connection with a motor shaft of the motor assembly; and an oil suction port of the oil pump assembly is in communication with the circulating oil channels, and an oil discharge port of the oil pump assembly is in communication with the total oil outlet. According to the electric oil pump assembly, the oil absorption of the oil pump assembly and the heat dissipation of the motor assembly are realized through the arrangement of the circulating oil channels, the heat dissipation performance and the working stability of the electric oil pump assembly are improved, the integration degree is high, and the light weight level is high.

The invention relates to a heavy truck chassis front end module structure and a chassis frame structure. The heavy truck chassis front end module structure comprises a chassis front end bracket, two front combined bracket structures arranged on the two sides of the chassis front end bracket respectively, a steering engine assembly arranged on the outer side of the front combined bracket structures, a front steel plate spring assembly arranged between the inner sides of the two front combined bracket structures, a radiator assembly and a front protection assembly. The bottom of the radiator assembly is arranged at the front ends of the two front combined support structures, the upper part of the radiator assembly is connected to the chassis front end bracket, the middle part of the front protection assembly is installed at the front ends of the two front combined bracket structures, and the two sides of the front protection assembly are correspondingly connected to the outer sides of the two front combined bracket structures respectively. The heavy truck chassis front end module structure aims to solve the problem that in a traditional technology, the front end structure of a chassis cannot meet the assembly performance and manufacturability requirements of a whole vehicle.

The invention discloses a preparation process of an EVA composite sole. The surface layers of adjacent shoe pieces of an EVA antibacterial and wear-resistant layer shoe piece, an EVA elastic and folding-resistant layer shoe piece and an EVA wear-resistant and slip-resistant layer shoe piece are heated and melted, then the adjacent shoe pieces are bonded together through a pressing mold, and the EVA composite sole with the EVA antibacterial and wear-resistant layer shoe piece, the EVA elastic an folding-resistant layer shoe piece and the EVA wear-resistant and slip-resistant layer shoe piece arranged on the upper layer, the middle layer and the lower layer correspondingly is finally formed. Due to the fact that the same EVA base material is adopted for bonding, when increasing influences of sunlight, temperatures and the like happen, the situation that the bonding position qualitatively changes, and consequently a shoe is damaged is not prone to happening, the overall structural strength is high, and the service life is long. The produced EVA composite sole has the composite performance of antibacterial performance, wear resistance, elasticity, folding resistance, wear resistance and slip resistance, and the EVA antibacterial and wear-resistant layer on the surface layer is not prone to breeding germs in a relatively warm and humid environment in summer when feet of a wearer sweat during sports.

The invention relates to the technical field of vehicles, in particular to a double-duct hybrid power device, a hovercar and a control method.The device comprises an outer duct, an inner duct and a compression propulsion system using compressed air as a working medium, the inner duct is arranged in the outer duct, and the outer duct and the inner duct are coaxially arranged; the outer duct comprises an air inlet end and an air outlet end, and an electric fan is arranged in the outer duct at the air inlet end; according to the description, the endurance mileage can be increased by using the compressed air, so that the unmanned aerial vehicle can achieve supersonic flight at a lower flight height; the air compressor and the outside atmosphere are used for supplementing pressure for the high-pressure air tank, the thrust ratio of the inner duct and the outer duct can be flexibly adjusted, and the hovercar can have higher thrust performance at the cost of sacrificing a certain mileage.

The invention relates to the technical field of electric cars, in particular to a battery module. The battery module comprises a plurality of cells, an electric core fixing plate, a positive electrodeconflux sheet and a negative electrode conflux sheet, wherein the positive electrode conflux sheet is fitted to the electric core fixing plate, and are fixed on the end surfaces of the positive electrodes of the plurality of cells, and the negative electrode conflux sheet is fixed on the end surfaces of the negative electrodes of the plurality of cells; cellular units for fixing the cells, corresponding to the quantity of the cells are arranged at the inner side of the electric core fixing plate; a plurality of support posts are arranged at the outer side of the electric core fixing plate; and the support posts are used for fixing the positive electrode ends of the cells in single battery module, and the positive electrode end and the negative electrode end of the corresponding cell in the serially connected battery module. The battery module has simple structure, and design and reasonable design, can effectively reduce the manufacturing cost and total quality of the battery module, can improve the energy density of the battery module, can ensure the safety and reliability of the battery module, and can improve the light weight level of the battery module.

The invention discloses a cantilever crane, an overhead working truck and a cantilever crane manufacturing method, relates to the field of engineering machinery, and aims to improve the structure of the cantilever crane and improve the bearing capacity of the cantilever crane. The arm frame comprises at least two nested arm sections. And at least one arm section comprises a first cover plate and a second cover plate. The first cover plate is constructed to be integral and comprises a first side plate, a top plate and a second side plate which are arranged in sequence; the first side plate and the second side plate are oppositely arranged, and the free ends, away from the top plate, of the first side plate and the second side plate are both convex or concave. The second cover plate is constructed to be integral and comprises a third side plate, a bottom plate and a fourth side plate which are arranged in sequence; the third side plate and the fourth side plate are oppositely arranged, and the free ends, away from the bottom plate, of the third side plate and the fourth side plate are configured to be convex or concave. The free ends of the first side plate and the third side plate are fixedly connected, and the free ends of the second side plate and the fourth side plate are fixedly connected, so that the first cover plate and the second cover plate define a closed contour.

The invention provides a corrugated energy absorption structure which comprises a plurality of energy absorption columns, and each energy absorption column is formed by splicing a plurality of corrugated units pairwise. Each corrugated unit is formed by splicing two corrugated sheets; An angle is formed between the two corrugated sheets, and each corrugated sheet comprises straight line edges arranged on the upper side and the lower side; a corrugated curved surface is arranged between the two straight line edges, and the side view of the curved surface is a curve. By means of the technical scheme, the energy absorption structure can have high energy absorption capacity in the collision process.

The invention discloses an electric oil pump assembly, a steering system and a lubricating system. The electric oil pump assembly is provided with a main oil inlet and a main oil outlet. A motor assembly, an oil pump assembly and a buckle are further included. The motor assembly is provided with a liquid cooling cavity communicating with the main oil inlet. The liquid cooling cavity comprises a circulation oil way located between a stator of the motor assembly and a motor shell of the motor assembly. The oil pump assembly is in power coupling connection with a motor shaft of the motor assembly. An oil suction port of the oil pump assembly communicates with the circulation oil way, and an oil outlet communicates with the main oil outlet. The buckle is connected between the oil pump assemblyand the motor assembly and is in clearance fit with one of the oil pump assembly and the motor assembly, and accordingly the oil pump assembly is supported at the end portion of the motor assembly ina floating manner. According to the electric oil pump assembly, the work energy efficiency of the oil pump assembly can be improved, the output pulse of the oil pump assembly is reduced, the heat dissipation performance and the work stability of the electric oil pump assembly are improved, and the machining precision and assembling precision requirement of the electric oil pump assembly can be lowered.

The invention provides a body back panel of a vehicle, a bumper installation assembly and the vehicle. The body back panel of the vehicle comprises a back wall inner plate (2). The middle portion, in the length direction, of the back wall inner plate (2) downwards protrudes relative to the two ends. When back longitudinal beam cover plates (3) of the vehicle are connected to the ends of the back wall inner plate (2), a part of each back longitudinal beam cover plate (3) protrudes downwards and is exposed at the end of the back wall inner plate (2). The body back panel of the vehicle effectively solves the problem that in the prior art, a body back panel of the vehicle is large in mass.

The invention provides a Boolean operation-based metamaterial energy absorption structure, which comprises an energy absorption box, and is characterized in that the energy absorption box consists of a plurality of metamaterial structures; the metamaterial structure is composed of a plurality of metamaterial monomers; a thin spherical shell is arranged in a regular polygon prism, and the vertical distance between the center of the regular polygon prism and each side face and the bottom face of the regular polygon prism is smaller than the radius of the thin spherical shell. Then Boolean operation is carried out on the thin spherical shell and the regular polygon prism in a manner that: the part, which is arranged in the regular polygon prism and overflows out of each side surface and the bottom surface of the regular polygon prism, of the thin spherical shell is an overflow part, and the overflow part of the thin spherical shell is removed to obtain the metamaterial monomer. By applying the technical scheme, lightweight protection and efficient energy absorption of the energy absorption box can be achieved.