47results about How to "Lightweight effect is good" patented technology

The invention discloses an integrated front cabin manufacturing method, an integrated front cabin structure and a lower vehicle body assembly with the integrated front cabin structure. The integrated front cabin manufacturing method comprises the steps that pouring liquid is poured into a front cabin mold, and vacuumizing operation is conducted on the tops of shock absorption tower molds on the left side and the right side of the front cabin mold, the left side and the right side of the rear portion and the middle portion of the front cabin mold and a feeding pipe of the pouring liquid; and pouring liquid overflowing from the top of the damping tower mold is guided out to a cinder ladle. The front cabin manufactured through integrated die casting is only provided with one part and has high integration, good lightweight performance, good front cabin size precision and excellent collision performance, the vehicle body rigidity and torsional rigidity of the white vehicle body are effectively improved, manufacturing is convenient, and the forming performance is excellent.

The invention relates to the technical field of battery boxes, discloses a lightweight composite material battery box lower box body and a forming method thereof, and relates to a typical structure design scheme and a forming process scheme of a composite material battery box. The lower box body of the battery box comprises connecting piece points such as a water cooling plate, a module and other inserts and components such as a lifting lug and a box body, thermal expansion foam prepreg serves as an internal expansion source, and the battery box is integrally formed through a thermal expansion mold pressing process. The whole lower box body is of a web-reinforced foam sandwich structure, and the strength and rigidity of the lower box body structure of the battery box can be improved through the web structure design in the light foam core, so that the mechanical property requirements of extrusion, bottom impact and the like of the battery box are met.

The invention discloses a lightweight high-strength power cable based on a composite material and application thereof, belongs to the technical field of cable preparation, and aims to solve the technical problem that the lightweight and anti-electromagnetic interference performance of a lightweight cable in the prior art needs to be further improved. The cable comprises a conductor layer, a light shielding layer, a wrapping layer and a composite sheath layer which are sequentially arranged from inside to outside, modified carbon spheres are introduced into a titanium dioxide aerogel structure for filling and loading copper particles, obtained composite aerogel serves as a filling material of the light shielding layer, the modified carbon spheres serve as a cross-linking agent and a filling material of light polyurethane, and the light shielding layer and the composite sheath layer are formed. The composite aerogel and the lightweight polyurethane significantly reduce the density of the cable and significantly improve the lightweight performance of the cable, and through the synergistic cooperation of the copper particles, the titanium dioxide aerogel structure and the hollow carbon spheres, the anti-electromagnetic interference performance of the material is significantly improved.

The invention relates to the technical field of railway vehicles, and provides a bogie frame, a bogie and a railway vehicle, and the bogie frame comprises a box beam, a bearing beam, an inner vertical plate, an outer vertical plate, a bearing bottom plate, a bearing top plate and a plate spring. The box beams are hollow and respectively form mounting channels. The bearing beams are arranged on the box beams respectively. The inner vertical plates are arranged in a bent mode and connected with the bearing beams in a welded mode to define a center pin channel. And the outer vertical plate is welded with the box beam. The bearing bottom plate is connected with the box beam, the inner vertical plate and the outer vertical plate in a welded mode. The bearing top plate is located above the bearing top plate, the top of the box beam is open, the bearing top plate extends to the position above the box beam and is connected with the box beam in a welded mode to seal the top opening, and the bearing top plate is further connected with the bearing beam, the inner vertical plate and the outer vertical plate in a welded mode. The plate spring is installed in the installation channel and extends in the longitudinal direction of the box beam, and the two ends of the plate spring are each provided with a cushion block used for being connected with a wheel set shaft sleeve. The structure is simple, the strength is high, and the forming is convenient.

The invention discloses a low-leakage Roots rotor profile with a larger shape coefficient, which is composed of half-leaf profiles symmetrically adjacent to the pitch circle of twice the number of blades, wherein the half-leaf profile is sequentially composed of four parts, namely, a peak concentric arc outside the pitch circle, a peak conjugate profile, a valley transition curve inside the pitch circle, and a valley concentric arc, which are connected end to end, and the corresponding endpoints and connection points are sequentially a peak point, a vertex, a midpoint, a root point located on the peak symmetry axis, and a valley point located on the valley symmetry axis. The invention has a larger shape coefficient and volume utilization coefficient; has a smaller radial leakage rate and a conjugate leakage rate, and thus has a higher volumetric efficiency and a better lightweight effect.

The application discloses a light-weight anti-settling type silicone heat-conducting pouring sealant powder filler and a preparation method thereof, and belongs to the technical field of heat-conducting pouring sealant materials. The powder filler is prepared by mixing 70-80 microns of aluminum hydroxide, 50-70 microns of silicon dioxide, 7-10 microns of aluminum hydroxide and 2-3 microns of aluminum oxide, and then adding a surface modifier for dry modification. The application effectively reduces the packing density of the filler, inhibits the settlement and stratification, and maintains good fluidity and heat-conducting performance by means of four-stage particle size grading and the combination of aluminum hydroxide / silicon dioxide / aluminum oxide three-material compounding and dry surface modification. After the obtained powder filler is compounded with vinyl silicone oil, the density of the pouring sealant can be as low as 2.02 g / cm3, the 72-hour settlement amount is only 0.3 mm, the heat-conducting coefficient reaches 1.46 W / m.K, and the pouring sealant has the advantages of light weight, anti-settling, high heat-conducting, low viscosity, halogen-free and flame-retardant. The powder filler has simple preparation process, low cost and wide application.

The invention relates to the technical field of railway vehicles, and provides a bogie frame, a bogie and a railway vehicle. The truck frame includes a load bearing body and two leaf springs. The bearing main body comprises two oppositely arranged C-shaped beams and two oppositely arranged wing-shaped beams arranged between the two C-shaped beams, the two wing-shaped beams are respectively provided with a mounting channel, the two C-shaped beams and the two wing-shaped beams are respectively and integrally cast and molded, and the two C-shaped beams and the two wing-shaped beams are integrally cast and molded. The two C-shaped beams and the two wing-shaped beams are suitable for being connected in a welded mode, and the two C-shaped beams and the two wing-shaped beams jointly define a center pin channel used for installing a center pin. The two plate springs are installed on the two installation channels respectively, the plate springs extend in the longitudinal direction of the bearing body, and the two ends of each plate spring are provided with cushion blocks used for being connected with a wheel pair shaft sleeve respectively. A high strength-to-mass ratio is achieved, the welding seam proportion is reduced to a low level, and the welding seam is made to be away from a high-stress area.

The utility model relates to the technical field of automobile manufacturing, in particular to a production line for batch production of steel-plastic automobile doors, a flame treatment system comprises a first main control cabinet, a flame control cabinet, a first robot control cabinet, a blowtorch robot, a left automobile door outer plate tool table, a right automobile door outer plate tool table and a back door outer plate / spoiler tool table; the gluing system comprises a second main control cabinet, a second robot control cabinet, a side door carrying robot, a rear door carrying robot, a left vehicle door upper / lower tool table, a right vehicle door upper / lower tool table, a reserved tool table, a back door upper / lower tool table, a heating fan and a glue supply system. The device has the advantages of being easy, safe and efficient to operate by staff, and programmed operation can be achieved after simple training; and compared with an all-steel vehicle door, the weight is reduced by 13%-15%, and the light weight effect is remarkable. The production requirements of different vehicle types are met by replacing the outer plate tool table of the flame treatment system and the upper / lower tool table of the gluing system.

The application relates to the battery technical field and discloses a battery pack and a power utilization equipment, which comprises a first beam body, a cover plate, a partition plate and a bottom plate. The first beam body comprises a first beam main body and a mounting piece connected with each other, the first beam main body is provided with an exhaust passage, the mounting piece is located on one side of the first beam main body along a second direction, the mounting piece is provided with a penetrating air inlet, the air inlet is communicated with the exhaust passage, the cover plate is connected with one end of the first beam main body which is away from the mounting piece, the partition plate is connected with the mounting piece, the partition plate, the first beam main body and the cover plate surround a containing cavity, a plurality of pressure relief parts are arranged on the partition plate, a gas collecting cavity is formed between the bottom plate and the partition plate, the gas collecting cavity is communicated with the air inlet, the bottom plate is connected with one end of the first beam main body which is away from the cover plate, and the end part of the partition plate which is close to the air inlet along the second direction is arranged in a spaced mode with the air inlet. The battery pack disclosed by the application reduces the material consumption of the partition plate.

The invention relates to a Roots rotor profile with higher volumetric efficiency and inner straight conjugation, comprising 4, 6, and 8 half-lobe profiles circumferentially symmetrically adjacent to each other under 2, 3, and 4 blades. The half-lobe profile is composed of six parts, namely, a peak concentric arc outside the pitch circle, a peak transition curve, a peak conjugated profile, and an inner straight conjugated profile, a valley transition curve, and a valley concentric arc inside the pitch circle, which are connected end to end. The corresponding endpoints and connection points are, in sequence, a peak point, a vertex, an outer starting point, a mid-node, an inner starting point, a root point located on a peak symmetry axis, and a valley point located on a valley symmetry axis. The low-leakage Roots rotor profile with a larger shape coefficient of the invention has a larger shape coefficient and a volume utilization coefficient, and a smaller radial leakage rate and a conjugate leakage rate, so it has a higher volumetric efficiency and a better lightweight effect.

This utility model relates to a suspension positioning parameter fine-tuning compensation mechanism for FSAE racing cars, installed between the wheel and the suspension, comprising: a suspension pillar with an upper bearing surface and a lower bearing surface, both bearing surfaces having bolt holes; the U-shaped bottom surface of the upper U-shaped clamp having matching holes corresponding to the two bolt holes on the upper bearing surface, and being detachably connected to the upper bearing surface by bolts; the U-shaped bottom surface of the lower U-shaped clamp having matching holes corresponding to the two bolt holes on the lower bearing surface, and being detachably connected to the lower bearing surface by bolts; and a positioning parameter fine-tuning wedge, which is a sheet-like structure with a predetermined thickness and / or inclination angle, and is selectively or simultaneously fitted between the upper bearing surface and the upper U-shaped clamp, and between the lower bearing surface and the lower U-shaped clamp. This utility model, by replacing wedges of different thicknesses and / or inclination angles, allows for quick and precise fine-tuning of the wheel track and wheel camber angle without disassembling the suspension assembly, effectively compensating for accumulated manufacturing and assembly errors, and adapting to the high-frequency steering requirements of FSAE racing cars.

The invention discloses a stable-structure, fire-extinguishing and flame-retardant lightweight composite material plate which is characterized by comprising a protective surface layer, an energy-absorbing buffer layer and a fire-extinguishing and flame-retardant inner layer which are sequentially compounded from outside to inside, and all the layers are integrally formed into the plate through a continuous hot-pressing compounding process; the preparation method of the composite plate comprises the steps of raw material pretreatment, preparation of each layer of continuous blank, and integrated forming and post-treatment of the continuous plate. The composite material plate is applied to a new energy battery shell. The invention aims to solve the problems of single function and insufficient safety protection performance of the existing new energy battery shell, realize the functions of stable integrated structure, fire extinguishment, flame retardance and light weight, improve the comprehensive safety protection performance of the battery shell, simplify the production process and reduce the production cost.

The utility model discloses an automobile seat light weight skeleton structure which comprises a cushion skeleton, a cushion fixing plate, a backrest adjusting plate, a backrest skeleton and a headrest connecting pipe, a hip support connecting steel pipe and a leg support connecting steel pipe are transversely and fixedly connected in the cushion skeleton, and a cushion supporting rib is fixedly connected between the leg support connecting steel pipe and the hip support connecting steel pipe. And backrest supporting ribs are transversely and fixedly connected to the backrest framework. According to the automobile seat, the seat cushion framework and the hip support connecting steel pipe are of a circular steel pipe structure, the backrest framework and the leg support connecting steel pipe are of a semicircular steel pipe structure, and the seat cushion supporting rib and the backrest supporting rib are of a thin and straight steel bar structure, so that the structural strength of the bearing part is ensured; steel materials are reduced at the non-bearing part, the weight is further reduced on the basis of the prior art, the weight of the whole vehicle seat framework is reduced in the same or similar mode, and the obvious overall weight reduction effect is achieved.

This invention discloses a lightweight deep neural network array direction finding method based on data redundancy removal, which solves the problem that the traditional RDNN direction finding method has a large number of deep neural network nodes and cannot achieve network lightweighting. The method performs redundancy removal operation on the upper triangular elements of the covariance matrix, simplifies the number of subsequent hidden layer nodes, reduces the computational complexity of the model, and ensures that the direction finding accuracy of the model is not lost, thus realizing high-precision direction finding of lightweight deep neural networks.

The present application relates to the field of rail vehicle technology, and provides a bogie frame, a bogie and a rail vehicle. The bogie frame comprises a box beam, a load bearing beam, an inner vertical plate, an outer vertical plate, a load bearing bottom plate, a load bearing top plate and a leaf spring. The box beam is hollow inside and forms mounting channels. The load bearing beam is arranged on the box beam. The inner vertical plate is curved and connected to the load bearing beam by welding to form a kingpin channel. The outer vertical plate is connected to the box beam by welding. The load bearing bottom plate is connected to the box beam, the inner vertical plate and the outer vertical plate by welding. The load bearing top plate is arranged above the load bearing top plate. The top of the box beam is open. The load bearing top plate extends above the box beam and is connected by welding to close the top opening. The load bearing top plate is also connected to the load bearing beam, the inner vertical plate and the outer vertical plate by welding. The leaf spring is mounted in the mounting channel. The leaf spring extends along the longitudinal direction of the box beam. The two ends of the leaf spring are provided with pads for connecting to wheelset shaft sleeves. The present application has the characteristics of simple structure, high strength and convenient forming.

The invention relates to the related technical field of brake friction materials, in particular to a caragana microphylla fiber reinforced light copper-free brake friction material and an operation method thereof. The friction material is composed of caragana microphylla fibers, sepiolite fibers, composite mineral fibers, phenolic resin, crystalline flake graphite, petroleum coke, aluminum oxide, friction powder, calcium carbonate, vermiculite powder, precipitated barium sulphate, zinc stearate and other functional components. Wherein the caragana korshinskii fibers have multiple excellent properties such as low density, high specific strength, environmental friendliness and reproducibility, the economic value of caragana korshinskii crops can be improved while the performance of the friction material is improved and the lightweight requirement is met by introducing the caragana korshinskii fibers into the resin-based brake friction material, and the economic value of the caragana korshinskii crops can be improved by adopting a method of combining alkali treatment and coupling agent treatment. The mechanical strength of the caragana microphylla fiber and the interface bonding strength of the caragana microphylla fiber and a resin matrix are improved, so that the enhancement potential of the caragana microphylla fiber is exerted, and the comprehensive performance of the friction material is optimized.

The utility model discloses a composite flat plate assembly and a composite flat plate conveying belt, and belongs to the technical field of conveying belts. The composite flat plate assembly is characterized in that the upper band plate, the lower band plate, the upper pin sleeve and the lower pin sleeve define a semi-closed cavity, sealing baffles are further arranged at the two ends of the upper band plate and the two ends of the lower band plate, and the semi-closed cavity is a closed cavity defined by the sealing baffles and the hinge units of the adjacent composite flat plate assemblies. The composite flat plate conveying belt has the advantages that the semi-closed cavity is defined by the upper belt plate, the lower belt plate, the upper pin sleeve and the lower pin sleeve, the light weight effect of the composite flat plate conveying belt is achieved, the upper belt plate of the composite flat plate can be made of abrasion-resistant materials to meet the abrasion requirement, and the lower belt plate is made of high-strength materials to meet the bearing requirement. Compared with a flat plate conveying belt of an integrally-poured hollow flat plate, although the flat plate conveying belt has a good light weight effect, the flat plate conveying belt is more flexible in application and lower in maintenance difficulty and replacement cost.

This invention relates to the field of welding materials technology, and particularly to a high-performance aluminum-lithium alloy flux-cored welding wire and its preparation method. The high-performance aluminum-lithium alloy flux-cored welding wire comprises: an aluminum-based metal strip outer sheath; and flux powder filled within the outer sheath. The flux powder includes deoxidizing components, alloy components, arc-stabilizing components, slag-forming components, and binding components. The alloy components of the aluminum-lithium alloy flux-cored welding wire, by mass percentage, include: Cu: 3.7%-4.3%, Li: 0.8%-1.5%, Mg: 0.25%-1%, Zr: 0.1%-0.16%, with the balance being Al and unavoidable impurities. The burn-off rate of active elements is significantly reduced, and the composition control accuracy reaches ±0.05%. The flux structure encapsulates highly active elements such as Li, Mg, and Zr in powder form within the aluminum-based outer sheath, avoiding high-temperature volatilization and oxidation in traditional smelting processes. These elements are released only during welding, achieving precise composition control and enabling the stable preparation of aluminum-lithium alloy welding wires with high Li content (2%-3%).

The present invention provides a method for preparing a porous Cu-Al-Mn-based alloy with ultra-large compressive elastic strain. By introducing pores into the Cu-Al-Mn shape memory alloy and regulating the highly oriented matrix phase and the pore phase, an ultra-large compressive elastic strain of 4% to 8% is obtained. This value exceeds that of most high-elastic metals reported in the current literature and has great application potential. At the same time, since the alloy has a porous structure, it is more than 10% lighter than alloys of the same volume and composition, and has a good lightweight effect. Third, due to its porous structure, the alloy has the effect of reducing noise and absorbing sound while having ultra-large elasticity. Fourth, the alloy prepared by this method has the characteristics of low elastic modulus (<10GPa). Fifth, the alloy has medium strength, with a compressive limit strength of 300 to 700MPa, which is higher than that of other porous alloys with the same composition.

The invention belongs to the field of new energy vehicles, and provides a lightweight battery bracket, which comprises a tray, a top cover, a spacing assembly and a connecting beam, the tray comprises an aluminum cladding, the bottom of the aluminum cladding is provided with a metal reinforcing plate distributed along the periphery of the aluminum cladding, the inner side of the metal reinforcing plate is provided with a non-metal liquid cooling groove, and the bottom of the non-metal liquid cooling groove is provided with a supporting plate. The two sides of the supporting plate are connected with the side faces of the tray, the top cover comprises a left cover plate, a middle cover plate, a right cover plate and a non-metal cover plate connected through a dovetail structure, and the non-metal cover plate and the non-metal liquid cooling groove are both made of ultra-high molecular weight polyethylene materials. By adopting the design of the single-layer aluminum cladding and the non-metal liquid cooling groove, the light weight effect can be achieved on the basis of realizing liquid cooling; and the top cover adopts the non-metal cover plate as a transition part among the left cover plate, the middle cover plate and the right cover plate, so that the flow of circulating water in the battery interval position is reduced, and the light weight is further realized on the basis of improving the cooling efficiency of the circulating water.

The invention discloses a high-temperature and high-pressure fuel gas reversing valve, which belongs to the technical field of energy power and comprises a shell component, a piston component and an ignition powder box. One end of the shell part is provided with a pressure guiding opening used for being connected with a high-temperature gas supply system, the other end of the shell part is provided with a medium-temperature gas inlet and a medium-temperature gas outlet, the medium-temperature gas inlet is used for being connected with a medium-temperature gas supply system, and an annular baffle is arranged in the middle of the shell part; the piston part penetrates through the annular baffle and is arranged in the shell part in the axial direction, and the two ends of the piston part are the sealing end and the piston end respectively. The ignition powder box is arranged on the side edge of the shell part, an inflation cavity is formed between the piston end and the annular baffle, and the inflation cavity is communicated with an air outlet of the ignition powder box. The invention further discloses a fuel gas supply system and method adopting the reversing valve. On the premise that an external air pressure control loop is not introduced, time-sharing and sequence-sharing independent work of the medium-temperature fuel gas supply system and the high-temperature fuel gas supply system can be achieved.

The invention relates to a catenary dropper identification method, in particular to a lightweight shielded catenary dropper identification method based on YOLOv10n, and solves the technical problem that an existing catenary dropper identification method is difficult to identify shielded catenary droppers under complex weather and different illumination conditions. According to the YOLOv10n-based lightweight shielded catenary dropper identification method, more feature maps are generated from existing features by utilizing linear transformation, the operation cost is remarkably reduced under the condition that the performance is not reduced, a weight coefficient is given to each channel by utilizing a channel attention mechanism of batch normalization, and then the features of each channel are combined, so that the recognition accuracy of the catenary dropper is improved. The method has the advantages that the operation efficiency is improved, the obvious features are highlighted, the catenary dropper can be well identified in severe weather such as rain, snow and fog or in a branch shielding scene, the operation amount is small, and the identification efficiency and accuracy are high.

The invention discloses a preparation method of a light anti-bending nylon 12 composite material. The preparation method comprises the following steps: firstly, preparing aramid pulp into a dispersion, and compounding the dispersion with a thermoplastic polyester elastomer (TPEE) to prepare a TPEE-aramid pulp compound; then carrying out surface treatment on the chopped carbon fibers by adopting a dopamine hydrochloride solution and a surface modifier to obtain modified chopped carbon fibers; finally, nylon 12, the TPEE-aramid pulp compound, the modified short carbon fibers, a cross-linking agent, an antioxidant and white oil are subjected to melt extrusion granulation, and the light anti-bending nylon 12 composite material is prepared. The material not only has the advantages of good lightweight effect, bending resistance, mechanical properties and the like, but also shows good economic applicability, the invention also discloses application of the lightweight bending-resistant nylon 12 composite material, and the lightweight bending-resistant nylon 12 composite material is a nylon 12 composite material which can be applied to preparation of thermoplastic carbon plates for shoes.

The present invention provides a lightweight battery box with anti-corrosion function, belonging to the technical field of battery boxes. It includes an installation box, a battery pack is installed at the bottom of the inner wall of the installation box, and a fireproof board is installed on the upper part of the inner wall of the installation box. The present invention promotes the airbag to continuously expand and contact the slotted inner wall through gas conversion between the gas storage chamber and the airbag, forming a sealing effect between the installation box and the sealing plate, greatly preventing water vapor or rainwater from flowing into the battery box from the gap, and avoiding the problem that some corrosive liquids such as rainwater contact the battery pack and cause the circuit inside the battery box to be corroded. At the same time, a protective component is set to absorb and disperse the energy impact on the surface of the protective cover, ensuring the structural strength while greatly reducing the overall weight. Through the specially designed prefabricated fracture groove and variable-oriented corrugated tube, the anti-collision performance and wading water drainage are good, while achieving the effect of improving the lightweight of the battery box.

The utility model relates to rail transit vehicle technical field, aims at solving the problem that the bottom plate of the vehicle body underframe structure adopts the equal section aluminum alloy section bar of longitudinal arrangement in prior art, cannot realize the change of bearing capacity in longitudinal direction, and the lightweight effect is limited, provides a kind of rail transit vehicle underframe structure, including two oppositely arranged underframe boundary beams, and underframe boundary beam is arranged along longitudinal direction;A plurality of underframe floor units are arranged between two underframe boundary beams, and underframe floor unit is arranged along transverse direction, and both ends of underframe floor unit are respectively fixedly connected on two underframe boundary beams, and all underframe floor units are spliced to form complete underframe floor;The utility model sets up underframe floor as a plurality of underframe floor units, and underframe floor unit is arranged transversely, and the underframe floor formed by the splicing of a plurality of transversely arranged underframe floor units can realize the change of bearing capacity in longitudinal direction, and different underframe floor units are arranged according to the different load demand, and lightweight can be realized to a greater extent.

The invention relates to the technical field of railway vehicles, and provides a bogie and a railway vehicle. The bogie comprises a framework and a central traction device, the framework comprises a bearing main body and two plate springs, a central pin channel is formed in the middle of the bearing main body, and two mounting channels are formed in the bearing main body in the longitudinal direction of the framework; the two plate springs are installed in the two installation channels correspondingly. The central traction device is installed in the central pin channel and comprises a traction beam, a pin sleeve, a central pin and a connecting rod, the traction beam is provided with an assembly channel in the height direction, the outer surface of the traction beam is provided with a connecting part, the pin sleeve is installed in the assembly channel, and a pin hole and two free gaps are formed in the pin sleeve in the height direction; the two free gaps are located on the two sides of the pin hole respectively, the center pin is installed in the pin hole, one end of the connecting rod is connected with the connecting part, and the other end of the connecting rod is suitable for being connected to a framework.

The invention belongs to the technical field of motorcycle engines, and particularly discloses a motorcycle single-cylinder engine and a motorcycle. The single-cylinder engine of the motorcycle comprises a shell assembly, the cylinder assembly is arranged on the shell assembly, the crankshaft is arranged in the shell assembly, a first balancing weight is arranged on the crankshaft, a driving gear is arranged on the crankshaft, a driven gear is arranged in the shell assembly, a second balancing weight is integrally arranged on the driven gear, and a first timing chain wheel used for driving a cam shaft to rotate is arranged on the balance shaft; the clutch assembly is arranged in the shell assembly and located on one side of the air cylinder assembly. The driven gear is arranged on the balance shaft and can be driven by the driving gear to rotate, and the second balancing weight and the driven gear are integrally arranged, so that the structure on the whole balance shaft is more compact, the overall size and weight of the engine are reduced, the lightweight performance of the engine is improved, and the service life of the engine is prolonged. And meanwhile, the assembly difficulty can be effectively reduced.

The invention relates to the technical field of railway vehicles, and provides a bogie frame, a bogie and a railway vehicle. The bogie frame comprises a bearing main body and two plate springs, the bearing main body is integrally cast and formed by adopting a high-strength casting material, the bearing main body comprises two C-shaped beams which are oppositely arranged and two wing-shaped beams which are oppositely arranged and arranged between the two C-shaped beams, the two wing-shaped beams are respectively provided with a mounting channel, and the two wing-shaped beams are arranged in the mounting channel. The two C-shaped beams and the two wing-shaped beams jointly define a center pin channel used for installing a center pin. The two plate springs are installed on the two installation channels respectively and extend in the longitudinal direction of the bearing body, and the two ends of each plate spring are provided with cushion blocks used for being connected with a wheel set shaft sleeve respectively. The bearing body can be rapidly formed, the high strength mass ratio can be achieved, and meanwhile the welding defect of the framework can be avoided. The bearing body is simple in structure, the weight of the plate spring is far smaller than that of a traditional side beam due to the structural form of the plate spring, and the lightweight effect of the framework is obvious.

This invention relates to the field of rail vehicle technology, providing a train bogie and a rail vehicle. The train bogie includes a frame and a wheel drive system. The frame includes a load-bearing body and two leaf springs. A center pin channel is formed in the middle of the load-bearing body, and two mounting channels are formed along the longitudinal direction of the frame. The two leaf springs are respectively mounted in the two mounting channels. The wheel drive system includes a shaft core, a bushing, and two wheels. The shaft core is rotatably mounted inside the bushing. A gearbox is constructed on the bushing, and a driving gear is provided inside the gearbox. A driven gear is sleeved on the shaft core, and the driving gear and the driven gear mesh externally. The two wheels are respectively mounted on both ends of the bushing via bearings, and the two wheels are respectively connected to both ends of the shaft core via flexible plates. Each leaf spring has a pad at both ends, and the pad is connected to the bushing. The load-bearing body and leaf springs replace the original crossbeam and side beam structure, resulting in a significant weight reduction effect on the frame.