2278 results about "Tread" patented technology

The invention discloses a tire finite element modeling and multidirectional rigidity optimization method and system based on characteristic lines. The method comprises the following steps: extracting tire section characteristic lines from a three-dimensional digital model; introducing the tire section characteristic line into a finite element analysis environment, generating a three-dimensional tire geometric model by rotationally scanning the characteristic line, and performing grid division on the model; setting tire material attributes, performing zoning setting on the model according to a tire crown, a tire shoulder and a tire side wall, and setting tire thickness based on zoning; applying a constraint boundary condition at the center of the tire, and establishing a contact form of the tread and the ground; a progressive inflation pressure load is applied, the deformation state of the inflated tire is calculated, and longitudinal rigidity, radial rigidity and lateral rigidity calculation and analysis steps are set; the tire elasticity modulus and the cord fabric thickness are used as design variables, and an optimization algorithm is adopted to solve a multi-objective optimization function. The method has the advantages of being simple in modeling method and high in practical operability, the tire modeling threshold can be lowered, and the fund and time cost of refined modeling is reduced.

A tire tread comprising a groove with a groove depth; a tread element adjacent to the groove; the tread element comprising a tread surface intended to engage a ground surface, a radial direction perpendicular to the tread surface, a sipe radially extending from the tread surface, along the radial direction the sipe exhibits an outer section parallel to the radial direction, an inner section parallel to the radial direction, the inner section comprising an even outer edge, an inclined section between the outer section and the inner section, the inclined section being inclined with respect to the radial direction of an inclination angle of at most 60°; the inclined section comprises undulations extending along the even outer edge.

The invention relates to the technical field of wheel performance testing, in particular to a laboratory testing method and system for representing the gripping performance of tire tread rubber on a wetland epoxy floor. According to the method, a thin water film of 10-100 microns is stably maintained on a representative epoxy substrate through online thickness measurement and closed-loop film control, a mu-slip rate curve is obtained at the slip rate of 0.1-10%, mu 0, mu max, delta mu and mu 10% are extracted and are subjected to in-situ fusion with British pendulum BPN under the same substrate and the same film thickness, and a wetland epoxy comprehensive grip index (WEGI) is formed. According to the method, the repeatability under the thin water film working condition and the comparability between laboratories are remarkably improved; embodiments show that the introduction of a small amount of LSBR and fine cutting grooves can synchronously improve [mu] max and BPN, while the repeatability of uncontrolled film, non-representative substrate or real vehicle test is poor. The method is suitable for rapid optimization of a new energy automobile tire tread formula.

The invention relates to the technical field of tire processing, in particular to a pattern and rolling resistance simulation evaluation method and system for a rubber engineering tire. The method comprises the following steps: acquiring tire pattern parameters; building a finite element model of tire-road surface contact according to the tire pattern parameters; according to the finite element model, determining deformation distribution, longitudinal tensile strain, grounding pressure distribution and pavement contact rigidity of the tire in the rolling process; and determining a rolling resistance evaluation value according to the deformation distribution, the longitudinal tensile strain, the grounding pressure distribution and the pavement contact rigidity. And rapid parameterization iteration is supported, and modeling errors caused by non-uniform geometric feature description are avoided. And the simulation accuracy and repeatability are ensured. The influence of the pattern structure on the rolling process is reflected, and a foundation is laid for a rolling resistance evaluation value. Quantitative evaluation of the tire rolling resistance is realized, data-driven design optimization is supported, and the simulation efficiency is improved.

The invention relates to the technical field of tire simulation design, in particular to a method, system and equipment for calculating contribution of tire parts to camber rigidity and a storage medium. The method is based on a finite element model and comprises the following steps: firstly, carrying out two-dimensional axial symmetry modeling and inflation analysis on a tire, rotating to generate a three-dimensional model, then establishing contact with a rigid road surface, applying rated inflation pressure and load, and carrying out steady-state rolling and camber working condition simulation to obtain reference camber rigidity comprising all parts; and then target parts such as a tread, a belted layer and sidewall rubber are selected, the Young modulus of the target parts is reduced to 0.01%-5% of a design value, the analysis is repeated on the premise that the Poisson's ratio of the target parts and other parts and boundary conditions are kept unchanged, and the camber rigidity of the target parts after degradation is obtained. The camber rigidity contribution value and contribution rate of the camber rigidity are calculated by comparing the difference value of the camber rigidity of the two working conditions and combining the occurrence frequency of the target component in the tire structure, and quantitative stripping of the camber rigidity influence of each component is achieved. According to the method, the component-level contribution spectrum can be quickly obtained on the premise of controllable errors, and an effective basis is provided for directional optimization design of the tire camber rigidity performance.

The invention relates to the technical field of tire detection, in particular to a method for identifying abnormal vibration of a tire through color difference of an automobile tire tread, which comprises the following steps: generating a point cloud picture; generating a first tire surface height point cloud picture at the first rotating speed; generating a first visual point cloud picture and determining an abnormal vibration level; dividing detection intervals, wherein n detection point sets are configured in each detection interval; generating a second tire surface height point cloud picture at a second rotating speed; reducing the rotating speed of the tire at a preset rate, calculating a stability score, and judging whether the stability of the detection device meets requirements or not; and in response to the satisfaction, rendering the tire surface to generate a second visual point cloud picture, and determining an abnormal vibration level. According to the method, the height difference of the tire surface height at each detection point position is calculated, and the tire surface is rendered according to the height difference and the preset color matching mechanism, so that the vibration condition caused by the tire surface height can be intuitively and visually displayed.

The invention relates to the technical field of rail transit monitoring, and discloses a multi-sensor fusion rail transit electric passenger car bogie dynamic performance monitoring method. The method comprises the steps that multi-source heterogeneous sensing data such as bogie vibration acceleration time sequence signals, wheel-rail contact force distribution data, bearing temperature gradient data and structural strain field data are collected; analyzing the vibration signal to extract a frequency band energy feature vector, performing spatial gridding mapping on the contact force data to generate a distribution matrix, and performing time-space alignment fusion on the two to form a primary fusion feature set; positioning a bearing temperature anomaly region through a deep convolutional network, and generating a secondary fusion feature set in combination with a structural strain concentration coefficient; and inputting the two-stage feature set into a dynamic performance evaluation model, outputting a performance degradation index set of scores of axle box bearing wear degree, framework fatigue cumulant, wheel set tread damage and the like, generating a maintenance priority sequence and triggering a preventive maintenance instruction according to the performance degradation index set, and realizing accurate monitoring and efficient operation and maintenance management and control of the dynamic performance of the bogie.

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.

A tire comprising a tread portion divided between a central portion and two shoulder portions; wherein two main external grooves extending in a circumferential direction of the tire are each disposed between the central portion and one of the two shoulder portions; wherein the central portion comprises a first intermediate rib, a second intermediate rib, and a central rib, each of the shoulder portions has a plurality of shoulder blocks in the shoulder portion; wherein at least one shoulder block shows at least one lateral sipe; each of the first intermediate rib and the second intermediate rib has a plurality of intermediate blocks in the intermediate ribs, wherein the intermediate blocks show a central sipe opened on either side of the intermediate block and arranged to have an opening on the main external groove facing an opening on the same main external groove of an adjacent shoulder lateral groove.

The application relates to a deformable wheel with non-pneumatic load bearing intended to equip a vehicle for rolling under extreme conditions such as those encountered on the Moon and on Mars, comprising a hub, an annular tread intended to be in contact with the soil, positioned around the hub which is concentric therewith and comprising a layer of composite material coated with at least one protective layer, and a plurality of metal cables whose outer diameter is comprised between 0.2 mm and 5 mm, each cable connecting the hub to the tread while being fixed, on the one hand by an external end to the tread, and on the other hand by an internal end to the hub by an elastic member making it possible to modulate the radial stiffness of the cables, each elastic member being associated with an abutment able to limit its deformation.

A press wheel includes a hub configured to rotate about an axis. The press wheel may further include a mounting portion removably attachable to the hub and having a center plane substantially perpendicular to the axis upon removable attachment with the hub. The press wheel may further include a plurality of tread portions connected to the mounting portion and configured to define a circumferential portion of the press wheel. The plurality of tread portions may have voids between adjacent tread portions. Each tread portion of the plurality of tread portions may include a tine extending away from the center plane.

The invention discloses an intelligent solid tire forming production system which comprises a plurality of six-axis robots and a plurality of tablet presses capable of correspondingly pressing base rubber, middle rubber and tread rubber into corresponding thicknesses, and each six-axis robot is provided with a forming device used for taking and achieving rotary winding of a tire blank. A tire blank conveying and detecting device is arranged between every two adjacent six-axis robots and used for temporarily storing tire blanks, weighing the rubber winding weight of the previous working procedure and determining the joint position after rubber winding of the previous working procedure. The six-axis robot can drive the forming device to achieve winding of base rubber, middle rubber or tread rubber at the outlet end of the corresponding tablet press, the outlet end of each tablet press is provided with a width and length fixing device capable of determining the length and width of rubber wound on a tire blank according to needs, and full-automatic rubber winding of a solid tire can be effectively achieved. Therefore, manual participation in the production process is reduced, the production efficiency is improved, and meanwhile the rate of qualified products is increased.

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.

The invention relates to the technical field of automobiles, in particular to a method for correcting automobile wind resistance through a tire database, and the method comprises the steps: collecting geometric parameters such as the section width, the flatness ratio and the tread pattern of a tire, building a parameterized CAD model, carrying out the refined CFD simulation, and obtaining a wind resistance coefficient difference value of a real tire and a smooth tire. And building a mapping database of tire characteristic parameters and wind resistance correction values based on the data, and training a prediction model by adopting a random forest algorithm. In practical application, the wind resistance correction value can be quickly predicted only by inputting tire geometric parameters, and high-precision correction of a bare tire simulation result is realized. According to the method, the consistency of simulation prediction and experimental data is remarkably improved, reliable support is provided for aerodynamic performance evaluation in the vehicle model development stage, the research and development cost is effectively reduced, and the development period is shortened.

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 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 present application provides an all-steel snow tire tread, consisting of the following raw materials in parts by weight: 50-80 parts of natural rubber, 20-50 parts of solution polymerized styrene butadiene rubber with dual glass transition temperatures, 40-60 parts of carbon black, 10-20 parts of white carbon black with a high specific surface area, 1-2.5 parts of silane coupling agent, 5-10 parts of modified anti-wet skid resin, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of anti-aging agent 4020, 1-3 parts of anti-aging agent RD, 1-3 parts of protective wax, 1-1.8 parts of sulfur, and 1-1.5 parts of promoter NS.

The tire structure comprises a rim, an outer tire and a solid inner tire, a bead of the outer tire is in sealed connection with the rim, the solid inner tire is arranged in the outer tire, a groove is formed in the inner ring surface of the solid inner tire, and an air inlet channel communicated with an air inlet of the rim is formed between the groove and the rim; a plurality of grooves which are communicated with one another are densely distributed in the surface of the tread of the solid inner tube, and at least one sidewall of the solid inner tube is provided with at least one air passage which is communicated with the grooves and the grooves; when the tire is not inflated, the tread of the solid inner tire is in close fit with the inner wall of the outer tire; after inflation, buffer gas exists between the tread groove of the solid inner tube and the inner wall of the outer tube. Therefore, the solid inner tube is arranged in the outer tube, so that the use is safer and more reliable; meanwhile, after inflation, the air enters the grooves along the inflation air channels, buffering air is formed, the buffering and damping effects can be achieved, and the driving experience can be effectively improved.

A gauge wheel coupled to a trailing arm assembly of a planter, the gauge wheel including a hub rotatable about an axis of rotation, a rim coupled to the hub and including a perimeter edge, the rim having a first side and second side opposite the first side, a first plurality of tread portions extending from the first side and positioned radially inward from the perimeter edge, and a second plurality of tread portions extending from the second side and positioned radially inward from the perimeter edge.

A tyre (1) for vehicles wheels comprises a tread band (2), on which there are defined main pair of grooves (10, 20) between which a first secondary main groove (30), and a first and second block (60, 70) delimited by the pair of main grooves and separated from each other by the first secondary groove (30). Both the edge (61) of the first block (60) and the edge (71) of the second block (70) facing the first secondary groove (30) comprise at least three edge portions, adjacent to each other and comprising at least a first edge portion (61a; 71a) defined by a chamfer and at least a second edge portion (61b; 71b) defined by an angular edge, alternating with each other. Each first edge portion (61a) of the first block (60) is aligned with a second edge portion (71b) of the second block (70), and each second edge portion (61b) of the first block (60) is aligned with a first edge portion (71a) of the second block (70).

The invention discloses a cooling device for a vulcanizing machine, belongs to the field of production of rubber products, and aims to solve the problems that a tire is not a simple solid cylinder or a multi-edge irregular shape, the thickness difference of different parts is large, and a tread is provided with complicated pattern grooves due to direct contact with the ground, so that the tire cannot be damaged. The cooling device for the vulcanizing machine solves the problems that due to the structural characteristics, heat distribution on the surface of a tire is extremely uneven, the heat dissipation resistance of a thick-wall part is large, waste heat accumulation is obvious, and cooling blind areas are likely to be formed in a thin-wall part and deep positions of pattern grooves, and comprises a base and a first supporting plate arranged above the base. The first water storage tank is fixedly connected to the lower portion of the base, the second water storage tank is fixedly connected to the upper portion of the first supporting plate, the air rod continues to move downwards to drive the rotating mechanism to rotate, a spray head rotates while spraying water for cooling, and therefore more comprehensive cooling covering on tires is achieved. Therefore, the effect of reducing the cooling blind area is achieved.

Entry level (1) for vehicles, which includes the following: - a fixed part (2) that can be permanently attached to the vehicle, - at least one movable tread surface (3), - Devices (4) for connecting and moving the movable tread (3) with the fixed part (2) and for moving the tread (3) between a retracted position in which the movable tread (3) is received near the fixed part (2) and an extended position in which the movable tread (3) projects beyond the fixed part (2), - a motor (5) for driving these connecting and moving devices (4), - a battery (6) for powering the motor (5), wherein the battery (6) is arranged within an installation space defined by the said entry stage (1); - Devices (7) for converting renewable energy, wherein the devices (7) are connected to the said supply battery (6) and supply it with electrical energy, wherein the devices (7) for converting renewable energy are arranged on a visible surface of the said entry step (1), wherein the visible surface defines a surface area of ​​a part of the said entry step (1) which protrudes from a space defined by the vehicle both when the movable step surface (3) is in the extended position and when the movable step surface (3) is in the retracted position.

1. Name of the product in this design: Sidewall tread pattern of a tire. 2. Purpose of this design: The whole product is a car tire, and the part is the sidewall tread pattern of the tire. 3. The key design feature of this product is the design of the tire sidewall tread pattern. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. Similar to the main view of each design, the top and bottom views of each design are omitted; symmetrical to the main view of each design after rotating 180 degrees, the rear view of each design is omitted. 6. Design 1 is designated as the basic design. 7. Other situations requiring explanation: This design requests partial design protection. The parts indicated by solid lines are the parts for which protection is requested, and the parts indicated by dashed lines are the parts for which protection is not requested.

A pneumatic tire has a carcass. The carcass includes a carcass ply extending from one bead portion to the other bead portion through a tread portion. The carcass ply is provided with at least one conductive thread extending from one bead portion to at least the tread portion. The conductive thread has an electrical resistance of 108 Ω / cm or less per unit length. The conductive thread has a stress of 13 N or less at 1% elongation.

A pneumatic tire is disclosed. The disclosed pneumatic tire comprises a tread having a plurality of blocks partitioned by means of first to fourth main grooves which are formed in the circumferential direction of the tire and are spaced part from each other with respect to the width direction of the tire from the inner side to the outer side thereof, thereby making contact with a road surface, wherein the tread includes an inside shoulder block, an inside middle block, a center block, an outside middle block and an outside shoulder block, which are partitioned with respect to the width direction of the tread from the inner side to the outer side thereof, the inside middle block, the center block and the outside middle block have first kerfs recessed in the depth direction from the surfaces thereof, and the inside shoulder block and the outside shoulder block have second kerfs which are recessed in the depth direction from the surfaces thereof and which have dome kerf parts provided in the middle portions thereof, the dome kerf part including a convex protrusion that convexly protrudes from one wall surface and a concave groove which is recessed from the other wall surface opposite to the one wall surface and in which the convex protrusion is inserted and accommodated.

The work machine is provided with a driver's seat (6) and a pedal (85) disposed in front of the driver's seat (6) and operated by foot stepping. The pedal (85) has a pedal main body (61) extending in a given direction, a pedal shaft (44) supporting the pedal main body (61) so as to be swingable in the given direction, and a tread surface provided on the upper surface side of the pedal main body (61) and on which an operator places a foot. The tread surface is formed in an inclined shape in which the height from the pedal main body (61) gradually decreases as the big toe side of the foot placed by the operator is directed toward the little toe side.

The utility model relates to motorcycle parts technical field provides a motorcycle big prop, motorcycle big prop includes big prop main part, reinforcing rib subassembly, treads, ground support foot, connecting plate, height limit support, damping assembly, connecting assembly and elastic support and limiting subassembly, big prop main part bottom both ends are fixedly connected with ground support foot, its lateral part is fixedly connected with tread, and connecting plate is fixedly installed on big prop main part top through connecting assembly, and height limit support is fixedly set up on connecting plate, and damping assembly is assembled in the rear end of height limit support, and one end of elastic support and limiting subassembly is connected with connecting plate, and the other end is connected with big prop main part. According to the big prop of the utility model embodiment, it can complete adapting spring breeze 700MT etc. original factory without big prop vehicle model without reforming the vehicle body.

1. Name of the product in this design: Tire tread. 2. Application of this design: The overall application is for automobile tires, and the partial application is for the tread of automobile tires. 3. The key design features of this product are the design of the tire tread pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. The rear view is the same as the front view rotated 180 degrees, so the rear view is omitted; the top view and bottom view are the same as the front view, so the top view and bottom view are omitted. 6. Other circumstances requiring explanation: This design requests partial design protection. The part indicated by the solid line is the part for which protection is requested, and the part indicated by the dashed line is the part for which protection is not requested.

This utility model provides an anti-impact tread cleaner. A connecting seat is hinged to a piston rod, and a buffer sleeve is installed in the hinge hole. The piston rod has a mounting hole, into which a spring rod is inserted. The spring rod has a spring seat at its front end and is installed in a mounting hole on the rear cylinder head at its rear end. A return spring is sleeved on the spring rod, with its front end abutting against the spring seat on the piston rod and its rear end abutting against a gasket installed in the piston rod mounting hole. Each tooth of the rack has a trapezoidal cross-section, with the angle of the force-bearing surface on both sides being 73° to 77°. The angle of the side of the limiting pin that mates with the force-bearing surface is the same as the angle of the force-bearing surface. An exhaust hole is provided near the connecting seat at the end of the piston rod, and a first filter screen is provided on the exhaust hole. An air inlet is provided on the rear cylinder head, and a second filter screen is installed in the air inlet. This design prevents the rack from deforming upon abnormal impact, allowing the tread cleaner to operate normally. The filter screen can be reused after replacement, and the overall buffer sleeve increases the deflection angle of the connecting seat connected to the grinding wheel.

An additive manufacturing process for all or part of a tire tread configured to smooth any raised areas (R) present on a circumferential bearing surface (5) of said tire by depositing an extruded material forming the tread, wherein a pressure regulating device (24) inside the extruder is controlled in real time, via a pressure control loop, according to a pressure measured by the pressure sensor and a constant pressure setpoint. The process is configured to smooth a plurality of raised areas (R) present on a circumferential bearing surface (5) of the tire. Figure for the abstract: Fig 8A