44results about How to "Lightweight construction" patented technology

The invention relates to a cross-member (3, 5) for the base region of a motor vehicle body shell structure (1), characterised in that at least some sections of said cross-member (3, 5) comprise a light metal or light metal alloy, preferably aluminium or an aluminium alloy, or preferably magnesium or a magnesium alloy, and in that at least some sections of this are produced by forging.

The invention relates to a shifting device of a motor vehicle change-speed gearbox comprising a selector shaft, a housing part on which said selector shaft can be rotatably mounted, an engaging unit for securing the selected positions, which comprises an engaging contour on a first engaging component and a second engaging component with an engaging element. Said components can be moved relative to each other and are locked counter to each other. Said motor vehicle change-speed gearbox also comprises a control sleeve which is arranged on the selector shaft.

The invention discloses a three-roll cross-rolling forming method for railway vehicle axles, which is characterized in that the bar is heated, and the bar is sent into a three-roll cross-rolling machine through an axial pushing device, and three cross-rollers are simultaneously engaged with the bar , and drive the bar to rotate. At the same time, the axial pusher pushes the bar to move axially at a constant speed. The radial drive mechanism controls the radial movement of the skew roll according to the diameter of the railway vehicle axle to be processed. When it moves to contact with the axial feeding device, the axial feeding device pulls the bar and continues to move axially at a constant speed, and at the same time the bar is separated from the axial pushing device, and a long step with a large diameter is obtained after processing Axle—the railway vehicle axle; the advantage is that the mold is simple to manufacture, and the force is evenly distributed on the surface of the rolled piece, which can effectively reduce the wear of the roll during the skew rolling process, enable the rolling mill to carry out lightweight construction, and effectively increase the service life of the rolling mill.

The invention relates to a light-weight indoor floor leveling mortar, which comprises the following components in proportion by weight: 30-35 ordinary portland cement, 4-5 hydrated lime, 5-8 light aggregate, 55-60 heavy aggregate (ordinary river sand) and 1.0 compound additive, wherein the light aggregate is an inorganic vitrified hollow cellular material of which the fineness is lower than 100 meshes; and the compound additive can be prepared by mixing 0.1 part by weight of dispersible latex powder, 0.3 part by weight of cellulose ether, 0.5 part by weight of water reducing agent and 0.1 part by weight of coagulant agent. The construction method comprises the following steps: watering the mortar with water which is 30-50% of the mortar in weight, mechanically or manually mixing until themortar and water are evenly mixed and achieve the viscosity, and carrying out mechanical spray coating or manual construction. The mortar of the invention has light weight, self-leveling performance,good smoothness, easy toweling, rapid construction, simple and practical process, low cost of unit area and popularization value, is favorable to mechanized construction, lightens the load quantity of a building body, improves the safety earthquake-resistant performance of the construction, achieves leveling thickness rapidly once, and is very suitable for leveling the floor of the bottom surfaceof a light weight floor material, such as a wood floor and the like.

The invention relates to a gearshift lever (18) for a motor vehicle gearbox, wherein the gearshift lever (18) is designed as a composite component having a metallic carrier body (15) and a lightweight body (13), characterized in that the carrier body (15) comprises a selector lever engagement (25).

The invention relates to a fabricated box and slot type FRP sectional material light fiber sea sand concrete beam. A main body of a fabricated beam is constituted by an FRP hollow box and slot sectionbeam section in the middle and precast concrete filled beam sections at the two ends jointly; and the FRP hollow box and slot section beam section in the middle comprises a lower FRP box chamber andan upper FRP slot, an FRP corrugated plate is adopted as a box and slot partition plate between the lower hollow box chamber and the upper slot, and on-plate corrugations are adopted as anti-shear connecting keys between FRP and concrete. According to the main body of the fabricated beam, the self-weight of a beam body is reduced from the two aspects of material and structure, thus transporting isconvenient, the beam can be quickly and reliably connected with the plate and a column, construction is easy, convenient and rapid, good adaptability to the severe engineering environments, with serious corrosivity, such as coastal ports is achieved, and good social and economic benefits and engineering application prospects are achieved.

The invention relates to the field of reinforced concrete arch bridges, in particular to a main arch forming process for cantilever pouring of single-rib dislocation of the main arch. Two single-box arch ribs are respectively arranged on the left and right sides of the double-width arch bridge to form the left and right sides The arch ring of the bridge, during construction, includes the following steps: Step 1, cantilever pouring the two arch ribs on the inside of the double-width arch bridge until the two inner arch ribs are closed; Step 2, cantilever pouring the two arch ribs on the outside of the double-width arch bridge until The two outer arch ribs join together to form the arch rings of the left and right bridges respectively. The main arch ring of the present invention includes two single box-shaped arch ribs, and the arch ribs in the arch ring are poured independently, which reduces the cross-sectional size of the arch ribs, and the segmental pouring weight is small, which is suitable for light construction of long-span arch bridges .

The invention relates to a shifting device of a motor vehicle change-speed gearbox comprising a selector shaft, a housing part on which said selector shaft can be rotatably mounted, an engaging unit for securing the selected positions, which comprises an engaging contour on a first engaging component and a second engaging component with an engaging element. Said components can be moved relative to each other and are locked counter to each other. Said motor vehicle change-speed gearbox also comprises a control sleeve which is arranged on the selector shaft.

The invention discloses a method for reinforcing a hollow slab girder bridge, which comprises the following steps: step S01, remove the damaged top plate, and repair the corresponding bottom plate, step S02, vertically bind and fix ribs, step S03, vertically place an air bag, step S04, install Mold, step S05, pouring concrete, step S06, taking out the mold and the airbag, step S07, setting reinforcing ribs, and repairing the top surface. Through the above scheme, the invention achieves the purpose of reducing the difficulty of the process and improving the construction safety, and has high practical value and popularization value in the technical field of bridge engineering.

The invention relates to a modular steel frame connection device. the modular steel frame connection device at least comprises a first square steel tubular column and a second square steel tubular column which are internally hollow and are connected through an inner sleeve. The inner sleeve is in clearance fit with the second square steel tubular column. the periphery of the inner sleeve is annularly provided with locating blocks parallel to the column opening of the first square steel tubular column and the column opening of the second square steel tubular column. the modular steel frame connection device further comprises a connection plate provided with an assembly hole matched with the inner sleeve. modular steel frames are connected in an inner sleeve mode, the fixing mode of screws or bolts is omitted, procedures of site construction are omitted, and the construction time is shortened. the modular steel frames and inner sleeves are welded, the firm degree between the frames is enhanced, and risks caused by loosening of the screws or the bolts are avoided. The modular steel frames are partially machined in a factory in advance and then constructed in a construction site, so that the site construction time is shortened greatly, and too many influences on the site environment are avoided.

The invention discloses a vacuum thermal insulation board derivative for an inner wall. The vacuum thermal insulation board derivative is composed of a bonding layer, a thermal insulation layer, a packing layer, a protection layer and a decorative finish layer, the bonding layer is made of aluminum foil, the thermal insulation layer is a vacuum thermal insulation board, the packing layer is made of hard foamed plastic, the protection layer is of a metal frame structure, and the decorative finish layer is made of flame retardant kraft paper. The vacuum thermal insulation board derivative for the inner wall is a material suitable for a thermal insulation system in the inner wall, the vacuum thermal insulation board derivative for the inner wall is good in thermal insulation effect, easy and convenient to construct, short in construction period, high in safety and low in cost, and a series of problems existing in the thermal insulation system of the inner wall are effectively solved.