1853results about "Rolling resistance optimization" patented technology

A spoke winding type high-sensitivity humidity sensor, the humidity sensor comprising a humidity-sensitive winding material and a spoke winding skeleton disc; a plurality of "T" shaped winding skeletons are uniformly distributed in a radial manner on the circumference of the spoke winding skeleton disc, and the humidity-sensitive winding material is wound on the plurality of "T" shaped winding skeletons; the space between every two adjacent "T" shaped winding skeletons simultaneously constitutes a winding limiting groove and an air flow channel, and after the humidity-sensitive winding material is wound, there is still space, i.e. the air flow channel, for air circulation, which is used to shorten the humidity absorption response time and the humidity desorption response time of the humidity-sensitive winding material.

The rubber composition for a tire tread according to the embodiment contains a rubber component containing a diene rubber and vegetable granules having a surface treated with a sulfonic acid-type surfactant. The rubber composition for a tire tread has excellent on-ice performance, excellent wet performance, and excellent low heat generation property.

The invention discloses a preparation method of tread rubber, and belongs to the field of rubber processing. The preparation method comprises the following steps: pretreating aramid pulp, a coupling agent and a lubricant, and then adding the pretreated aramid pulp, the coupling agent and the lubricant into natural rubber to prepare aramid pulp master batch particles; the obtained aramid pulp master batch particles are added into raw materials for preparing tread rubber, and the prepared rubber material has excellent mechanical properties, wear resistance and low rolling resistance. According to the method, the dispersity and interface combination of the aramid pulp in the rubber are remarkably optimized, the comprehensive improvement of the mechanical property, the wear resistance and the rolling resistance of the tread rubber is realized, and the tread rubber has outstanding industrial application value.

The invention provides a wheel which comprises an outer spoke, an inner spoke and a rim, the outer spoke and the inner spoke are sequentially and fixedly connected with the inner wall of the rim in the axis direction of the rim, a plurality of mounting through holes are formed in the outer spoke, a plurality of connecting through holes are formed in the inner spoke, and the connecting through holes correspond to the mounting through holes in position in a one-to-one mode. And the outer spoke is fixedly connected with the inner spoke at the connecting through holes and the corresponding mounting through holes. According to the wheel, the hub spoke part is of a double-layer structure formed by combining the outer spoke and the inner spoke, and the multiple connecting sleeves are arranged at the positions needing to be connected, so that the outer spoke and the inner spoke do not need to bear too much torque, the lateral rigidity of the wheel can be remarkably improved, meanwhile, the material of the hub spoke of the wheel and the total weight of the wheel can be reduced, and the service life of the wheel is prolonged. Therefore, the material cost of the wheel is reduced, and light weight of a vehicle is achieved.

The invention relates to an indirect rear viewing system for a motor vehicle having a supporting element for fastening at least one reflective element, wherein the supporting element has a coupling region for a position variable fastening / attachment to an adjusting element, which in turn can be attached to the vehicle, wherein the coupling region contacts a counter contact regions, of the adjusting element, wherein interlocking anti rotation means are present on the supporting element and on the adjusting element, wherein the anti rotation means are forming an index geometry, which, in a first operating state, permits an adjustment of the supporting element relative to the adjusting element about two axes of rotation, which are transverse to one another, and, in at least a second operating state, permits a basic position change of the supporting element relative to the adjusting element about a third axis of rotation which is aligned transversely to the two other axes of rotation.

The high-strength low-friction retainer formed through high-pressure casting comprises a retainer body, the retainer body comprises two arc-shaped sections and a plurality of window beams connected with the two arc-shaped sections, window holes for containing rolling bodies are formed between the adjacent window beams, and the sides, away from the window holes, of the window beams located at the two ends of the retainer body are provided with inward concave faces. And the inner concave surfaces of the two adjacent retainer main bodies are oppositely arranged to form an oil accommodating gap, so that the oil storage space in the bearing is obviously increased. According to the retainer, sufficient lubricating oil is guaranteed between the rolling body and the retainer main bodies and between the retainer main bodies, more effective heat dissipation is further facilitated, the design of the inner concave faces reduces the direct contact area between the adjacent retainer main bodies compared with a straight face, and therefore friction and abrasion between the retainer main bodies are reduced, and the service life of the retainer main bodies is prolonged. And the overall performance and stability of the bearing are improved.

This invention relates to the field of rear drive axle assembly technology, and more particularly to an assembly fixture for a wire retaining ring for a rear drive axle half-shaft. The fixture includes an assembly sleeve containing a cylindrical wire retaining ring placement groove and a cylindrical clearance groove, the latter communicating with the bottom surface of the placement groove. During assembly, the wire retaining ring is first placed in the placement groove. Then, the assembly fixture with the wire retaining ring is aligned with the half-shaft end face. Next, the second end of the assembly sleeve is pressed or struck, causing the wire retaining ring and the assembly sleeve to expand outwards by the half-shaft. Finally, after the wire retaining ring moves into the half-shaft groove, it retracts and returns to its original position. Using this assembly fixture, the wire retaining ring only needs to expand to the outer diameter of the half-shaft to complete the assembly, effectively reducing the possibility of the wire retaining ring failing to retract and return to its original position, thus improving the assembly quality stability of the wire retaining ring.

The application provides a heavy truck axle housing manufacturing method, which comprises the following steps: selecting a ladder-shaped pipe blank, firstly performing axial annular material supplementing pre-expanding to obtain a pre-expanding pipe blank with an upper flat side, a lower side and front and rear convex sides, the wall thickness of the upper flat side is almost not thinned, and the wall thickness gradually decreases from the upper side to the lower side along the annular direction; and performing final expanding after annealing to obtain an axle housing pipe, the upper side of the pre-expanding pipe blank becomes a front flat surface with a bell-shaped additional front cover, the front and rear sides are shaped into a H-shaped side beam, the lower side becomes a semispherical rear oil cover, and the wall thickness of the front flat surface and the side beam is increased. The pre-expanding die is composed of left and right pressing heads, left and right sliding dies, an upper control die and a lower control die, the cavity axial width of the upper flat area of the upper control die is greater than that of the front and rear convex sides. The manufactured heavy truck axle housing is free of welds and oil leakage, the wall thickness of the front flat surface and the side beam of the axle housing is large, the bending and torsion resistance is improved, the diameter expansion rate is large during hydraulic expanding, the wall thickness thinning rate is small, the forming quality is good, and the material utilization rate is high.

The utility model discloses a carbon fiber composite reinforced electric automobile hub which comprises a hub body, the hub body comprises a rim, the left side and the right side of the rim are respectively provided with a front wheel flange and a rear wheel flange, and the front wheel flange and the rear wheel flange are respectively provided with a wheel flange groove. Grid patterns are pressed in the rim groove, and a composite layer integrally formed with the hub body is arranged in the rim groove. The composite layer comprises gridding cloth and liquid glue, and the surface of the composite layer is flush with the surface of the rim; a plurality of strip-shaped grooves which are uniformly and annularly distributed are formed in the front surface of the hub body, and two polygonal grooves which are symmetrically formed are formed between any two strip-shaped grooves; the polygonal grooves are evenly and annularly distributed along the hub body and are arranged in a bilateral symmetry mode. The rim groove is formed in the rim of the hub body, and the composite layer integrally formed with the hub body is arranged in the rim groove, so that the structural strength is higher; and a plurality of grooves are formed in the hub body, so that the overall mass is lighter.

The invention discloses a preparation method of bio-based material modified coumarone resin, an obtained product and application. The preparation method comprises the following steps: mixing a mixture containing polymerizable components indene and coumarone, styrene or a derivative thereof and a catalyst; then dropwise adding a mixture containing polymerizable components indene and coumarone and an organic solvent solution of a bio-based material to carry out polymerization reaction; and adding a quenching agent after the reaction, and performing post-treatment to obtain a final product. According to the invention, a bio-based material is adopted as a raw material, and the raw material is derived from natural plants and has the characteristics of environmental friendliness, degradability and the like, so that the cyclic utilization of resources is realized, and the generation of wastes is reduced. The bio-based modified coumarone resin is high in hydroxyl content and narrow in molecular weight distribution, the compatibility of the coumarone resin and polar resin is improved, the use performance and the application range of the coumarone resin are improved, and the bio-based modified coumarone resin has good application prospects in the fields of adhesives, rubber, coatings, ink and the like, and is particularly suitable for tire tread rubber.

The invention relates to the technical field of tire rubber manufacturing, and discloses an EV tire tread rubber composition adapting to low temperature and a mixing method thereof. According to the invention, the high-vinyl solution polymerized styrene-butadiene rubber A, the low-glass transition temperature solution polymerized styrene-butadiene rubber B and the lithium-series cis-butadiene are matched to form a rubber substrate, and the high-dispersion white carbon black, the bio-based filling oil and the high-proportion wet-skid-resistant resin are matched, so that the matching amount of various raw materials is strictly controlled; and the rolling resistance of the tire at low temperature is effectively reduced while the gripping performance of the tire is ensured.

The application provides a rubber composition for tires and a preparation method and application thereof. The rubber composition for tires of the application applies high-molecular-weight smoked sheet rubber, greatly improves mechanical and dynamic properties of vulcanized rubber, adopts neodymium-based butadiene rubber with wear resistance, fatigue aging resistance and lower heat generation, and applies solution styrene-butadiene rubber with higher thermal stability and good flex resistance at high temperatures, and improves comprehensive performance of the formula in multiple aspects. The application adopts super wear-resistant N134 and uses bio-based white carbon black and conductive carbon black, provides super high wear resistance of the formula, reduces heat generation, and makes the tire not fail due to a large amount of heat accumulation in a continuous operation process. The application adopts a high inorganic metal oxide filling amount method, greatly improves a thermal conductivity coefficient of the formula, further improves heat accumulation resistance of the formula, timely discharges heat generated in an extreme condition, and ensures safety of tire operation.

The application discloses a hollow noise-reducing light-weight hub and a hub mold, which comprise a rim and spokes, the rim is provided with an outer window and a gas port, a hollow cavity is arranged in the rim, the hollow cavity is provided with a first aperture at the outer window and a second aperture at the gas port, and a third aperture is arranged on the back side of the spoke; the above structure makes the wall thickness of the rim uniform, casting defects are not easy to occur, noise can be reduced, the hub can be lightened, and the weight of the hub is lighter than that of an existing hub; the mold comprises a lower mold, a sand core and an upper mold; the lower mold is provided with a boss portion and a groove portion, the boss portion is provided with a first recess and a second recess; the main body of the sand core is provided with a first convex portion and a second convex portion; the upper mold is press-fitted on the sand core, the bottom of the upper mold is provided with an arc pressing portion, the arc pressing portion is arranged above the groove portion, the arc pressing portion is in contact with the top surface of the boss portion, the lower mold, the sand core and the upper mold are assembled and fixed, and product casting is completed.

The problem to be solved by the present disclosure is to provide recovered carbon black that enables the production of a tire excellent in breaking resistance and excellent in reinforcing characteristic, a rubber composition containing the recovered carbon black, and a tire produced from the rubber composition. The solution is recovered carbon black having a carbon content of 85 mass% or more and 97 mass% or less, an ash content of 0.5 mass% or more and 10 mass% or less, and a statistical thickness specific surface area of 50 m2 / g or more.

Tires (1), comprising: a plurality of main grooves (21, 22) extending in a circumferential direction of the tire; and a plurality of web sections (31, 32, 33) defined and formed by the main grooves (21, 22); wherein at least one pier section (31, 32, 33) of the pier sections (31, 32, 33) comprises the following: a first narrow groove (331) having one end at an edge section of the web section (31, 32, 33) connected to the main groove (21, 22), and another end within the web section (31, 32, 33); and a second narrow groove (332) extending in the circumferential direction of the tire and having both ends within the rib section; wherein the first narrow groove (331) is inclined from one end to the other in a direction of the tire circumference and the first narrow groove (331) and the second narrow groove (332) are arranged in a V-shape, the upper section of which is directed in one direction of the tire circumference, and are arranged separately from each other, wherein the groove widths of the first narrow groove (331) and the second narrow groove (332) are in a range of 1.5 mm or more and 3.0 mm or less.

The invention belongs to the technical field of vehicle rear axles, and particularly relates to a coal mine explosion-proof diesel engine trackless rubber-tyred vehicle rear axle which comprises a rear axle body, shaft heads are installed at the two ends of the rear axle body respectively, half axle assemblies are fixedly installed on the side walls of the shaft heads, brake hubs are fixedly installed on the half axle assemblies, and the brake hubs are fixedly installed on the rear axle bodies. A main speed reducer assembly is installed in the middle of the rear axle body, fixing seats are fixedly installed on the two sides of the top of the rear axle body, damping devices are correspondingly installed on the tops of the fixing seats, the radial impact force on the rear axle in the vehicle operation process can be greatly reduced through the damping devices, and the rear axle is effectively prevented from being damaged and losing efficacy. The anti-collision devices are symmetrically arranged on the two sides of the main speed reducer assembly, an adjusting mechanism is arranged on one side of each anti-collision device, the adjusting mechanisms are connected with the anti-collision devices through transmission shafts, and multi-angle adjustment of the anti-collision devices is achieved through the adjusting mechanisms. When the rear axle is collided in the working process, key components of the rear axle can be effectively protected, and the service life is prolonged.

Provided is a rubber composition having excellent wear resistance and operability. The rubber composition of the present disclosure is a vulcanized rubber composition having a rubber component that contains a multicomponent copolymer containing a conjugated diene unit, a non-conjugated olefin unit and an aromatic vinyl unit, where the vulcanized rubber composition has a plurality of voids, and an average diameter of the voids is 10 µm to 300 µm.

A wheel includes a boss, a rim, and a web. When viewed in a longitudinal section of the wheel, the boss includes a contour extending from the web to an end face in the axial direction of the boss. The contour includes curves. A first curve is continuous with the web. The first curve has a first radius of curvature. The second curve is arranged on the end face side in the axial direction of the boss relative to the first curve. The second curve has a second radius of curvature. The second radius of curvature is greater than the first radius of curvature. The path length of the second curve is greater than the path length of the first curve.

The invention relates to the field of rubber formulas and manufacturing processes, and provides high-cutting-resistance and impact-resistance side wall rubber of a tensile tire and a preparation method of the high-cutting-resistance and impact-resistance side wall rubber. The sidewall rubber is prepared from components in parts by weight as follows: 60-80 parts of natural rubber, 10-20 parts of emulsion polymerized styrene-butadiene rubber, 10-20 parts of butadiene rubber, 30-40 parts of carbon black, 10-25 parts of white carbon black, 1-5 parts of carbon nanotubes, 1-3 parts of a silane coupling agent, 1-3 parts of tear-resistant resin, 1.5-2 parts of stearic acid, 2-3 parts of zinc oxide, 2-5 parts of an anti-aging agent, 1-2 parts of protective wax, 1-2 parts of an accelerant and 1-2 parts of sulfur. According to the invention, a ternary polymer matrix of natural rubber / emulsion polymerized styrene-butadiene rubber / butadiene rubber is adopted to balance strength, rigidity and toughness, a ternary composite reinforcing system taking carbon black as a main body, a small amount of white carbon black as an auxiliary and carbon nanotubes as a key reinforcing phase is constructed, and the problem of dispersion of the carbon nanotubes is effectively solved by utilizing a multi-section mixing process.

A method for preparing a heavy-duty tire with a natural rubber (NR) modified by graphene / carbon blacks varying in particle size synergized with a vulcanization system is provided. Carbon blacks varying in particle size are subjected to surface modification to obtain an graphene oxide / carbon blacks varying in particle size aqueous dispersion. Subsequently, a graphene oxide / carbon blacks varying in particle size modified NR masterbatch is prepared using an aqueous-phase synergistic aggregating precipitating process. Finally, a natural rubber heavy-duty tire is prepared from graphene / carbon blacks varying in particle size synergistically vulcanized modified natural rubber through a molding process. Compounding of graphene with the carbon blacks varying in particle size is utilized to improve dispersion of reinforcing fillers within the rubber matrix. Adjustment of a ratio of a vulcanizing agent to an accelerator is utilized to regulate a cross-linked network structure of the rubber.

An omni wheel includes a hub bracket and roller components. Each roller component includes a first roller assembly and a second roller assembly. The first roller assembly includes a roller bracket and a first roller structure. The second roller assembly includes a second shaft and a second roller structure, and the second shaft includes a second shaft body and a limiting portion. The second shaft body is connected and locked to a first connection structure to axially limit the second roller structure with respect to the limiting portion and the first connection structure. The omni wheel can ensure that second rollers will not shake and oscillate during running of the omni wheel and thus reduce vibrations and noise of the omni wheel, therefore improving the running stability.

A conductive self-lubricating bearing based on a metal mesh extension structure and a preparation method thereof, the conductive self-lubricating bearing based on a metal mesh extension structure includes a body and a through hole. The body includes a low-friction layer and a conductive mesh. The conductive mesh has a plurality of mesh holes arranged in an array. The conductive mesh is embedded in the low-friction layer and part of the conductive mesh is evenly exposed on one end face of the low-friction layer. The exposed part is a conductive contact and is used to contact an external workpiece. The low-friction layer is provided with an end face that exposes the conductive mesh as a conductive surface, and the other end face of the low-friction layer is a non-conductive surface. The through hole is formed by punching out the conductive surface. During punching, the conductive mesh located in the through hole is extended to the non-conductive surface, allowing the internal and external workpieces of the body to pass current, thereby realizing the integrated processing of the through hole and the metal mesh extension, eliminating the secondary processing step of the notch.

The invention relates to the technical field of tread rubber, and discloses high-performance tire tread rubber based on a synergistic system and a preparation method thereof.The method comprises the following steps of first-stage mixing, second-stage mixing, third-stage mixing, final mixing and vulcanization molding. By adopting a composite vulcanization system composed of dicumyl peroxide and sulfur and cooperating with zinc methacrylate as a functional auxiliary agent, a dual synergistic cross-linked structure composed of a free radical cross-linked network and an ionic cross-linked network is formed in the vulcanization process, so that the uniformity and stability of the cross-linked network structure of the tread rubber can be effectively improved, and the service life of the tread rubber is prolonged. The reasonable regulation and control of the crosslinking density of the tread rubber in the vulcanization process are ensured, the problem that a traditional single vulcanization system cannot give consideration to the wear resistance and the dynamic heat generation performance is solved, the comprehensive mechanical property and the dynamic use performance of the tread rubber are further improved, and firm chemical combination between the reinforcing filler and rubber molecules is ensured.

To provide a rubber composition with excellent on-ice performance. To solve the above issue, the present disclosure contains a rubber component, a fatty acid amide, and a liquid polymer with a polystyrene-equivalent weight average molecular weight measured by gel permeation chromatography of 5,000 or more and less than 40,000.

A drive axle assembly includes a drive motor, a main reduction axle, a parking brake caliper, and a parking brake disc. The main reduction axle is connected to the drive motor and wheels of a vehicle, the main reduction axle includes an intermediate shaft and an intermediate gear, the intermediate shaft is coupled with the intermediate shaft, and an output shaft of the drive motor is coupled with the intermediate gear. The parking brake caliper includes an accommodating space. A part of the parking brake disc is located in the accommodating space, and the parking brake disc is connected to the intermediate shaft.

The invention discloses high-wear-resistance tread rubber for a mine tire and a preparation method of the high-wear-resistance tread rubber, and relates to the technical field of tires. According to the invention, the ATT-Si / AL additive is creatively introduced and used together with carbon black as a wear-resistant main body, and an alkaline accelerator formaldehyde p-toluidine condensation compound and a conventional accelerator are synergistically applied to a wear-resistant tread rubber system for the first time; wherein the accelerator formaldehyde-p-toluidine condensation compound not only provides flat vulcanization characteristic and excellent aging resistance for the rubber material, but also solves the problems of'filler-rubber 'interface weakening and stress concentration caused by high-hardness filler by activating silanization reaction and catalyzing covalent bonding between a sulfur cross-linked network and a rigid filler interface through the alkalinity of the accelerator formaldehyde-p-toluidine condensation compound; the ATT-Si / AL additive and the accelerator formaldehyde p-toluidine condensation compound cooperate to form a physical-chemical dual enhanced network, so that the tread rubber keeps high strength and high wear resistance level under extreme wear.

The present application relates to the technical field of automobile wheel hub die, in particular to a wheel hub spinning die, comprising: a lower die assembly and a pressing plate (9) for pressing a wheel hub casting on the lower die assembly; the pressing plate (9) has a spoke top pressing surface for pressing spokes in the wheel hub casting. The present application provides a wheel hub spinning die which can press the casting and will not cause deformation of the spokes of the casting.

The invention discloses a low-noise and low-rolling-resistance tire tread and a preparation method thereof, and relates to the technical field of tire production, the low-noise and low-rolling-resistance tire tread comprises a supporting layer and multiphase composite tread rubber; the multiphase composite tread rubber comprises a continuous phase matrix, white carbon black with a two-phase structure, functionalized multiwalled carbon nanotubes, a disilane coupling agent, dynamic crosslinking thermoplastic elastomer particles, zinc oxide, stearic acid, an anti-aging agent, an accelerant and sulfur, and good wear resistance and mechanical strength are kept while the rolling resistance and driving noise of a tire are remarkably reduced.

The invention discloses a preparation method of an ESBR / SiO2-coated ESSBR composite material, and belongs to the technical field of rubber composite material production, and the preparation method comprises the following steps: S1, preparing white carbon black nanoparticles; s2, preparing a dopamine solution; s3, additionally preparing white carbon black (SiO2-PDA) modified by dopamine; s4, preparing a SiO2 coated ESSBR (Ethylene Styrene Butadiene Rubber) organic hybrid filler; s5, flocculating a mixture of emulsion polymerized styrene-butadiene rubber and the SiO2 (at) ESSBR organic hybrid filler to obtain a rubber master batch; s6, adding the rubber master batch, zinc oxide, stearic acid and an antioxidant 4020 into the internal mixer, mixing for 6 minutes, discharging rubber, cooling to room temperature, mixing on an open mill, adding sulfur and an accelerant CZ, batching out, and cooling for later use; s7, vulcanizing the rubber compound in a press vulcanizer, and fully cooling at room temperature after vulcanization to obtain the ESBR / SiO2-coated ESSBR composite material, the technical problems of low grafting rate of white carbon black, poor dispersibility of silicon dioxide and poor compatibility of silicon dioxide and a rubber matrix are solved, and the ESBR / SiO2-coated ESSBR composite material is widely applied to production of rubber composite materials.

The invention provides a wheel which comprises an outer spoke, an inner spoke and a rim, the outer spoke and the inner spoke are sequentially and fixedly connected with the inner wall of the rim in the axis direction of the rim, a plurality of mounting through holes are formed in the outer spoke, a plurality of connecting through holes are formed in the inner spoke, and the connecting through holes correspond to the mounting through holes in position in a one-to-one mode. And the outer spoke is fixedly connected with the inner spoke at the connecting through holes and the corresponding mounting through holes. According to the wheel, the hub spoke part is of a double-layer structure formed by combining the outer spoke and the inner spoke, and the multiple connecting sleeves are arranged at the positions needing to be connected, so that the outer spoke and the inner spoke do not need to bear too much torque, the lateral rigidity of the wheel can be remarkably improved, meanwhile, the material of the hub spoke of the wheel and the total weight of the wheel can be reduced, and the service life of the wheel is prolonged. Therefore, the material cost of the wheel is reduced, and light weight of a vehicle is achieved.