1208results about "Tyre parts" 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 rubber coating for a radiofrequency identification device for a tyre characterized in that it comprises: (a) 100 phr of at least one diene-based elastomer; (b) at least one chemical according to formula (1) wherein the chemical comprises in its structure at least the structure of the 2,2′-methylenediphenol, and wherein the 2,2′-methylenediphenol may be substituted in ortho, para, meta position or any combination thereof with an aliphatic, linear or branched, hydrocarbon chain comprising from 1 to 10 C atoms, or may be polymerized in ortho, para, meta position or any combination thereof with one or more additional alkylphenol units. A radiofrequency identification (RFID) module for a tyre comprising a radiofrequency identification device surrounded by a rubber coating, a tyre or a tyre retread comprising such radiofrequency identification module, and use of a rubber coating for surrounding a radiofrequency identification device.

The invention belongs to the technical field of tire engineering design, and discloses an engineering tire belted layer end structure finite element design analysis method and system. Comprising the steps of obtaining and preprocessing tire carcass contour data and initial belted layer parameters, conducting belted layer end parametric modeling on the basis of a standardized tire geometric model, constructing a durability finite element analysis model to obtain a stress-strain distribution field, conducting multi-parameter sensitivity analysis to determine a key influence factor weight matrix, and obtaining a stress-strain distribution field. And optimally designing a belted layer end structure based on the matrix, and finally performing durability verification and evaluation. According to the method, through accurate geometric expression, flexible parametric modeling, accurate performance analysis and multi-objective optimization design, belted layer end stress distribution uniformization and structural rigidity optimization are achieved.

The invention provides an aircraft tire shoulder heat generation optimization method and system based on interlayer pixel-level modeling, and relates to the technical field of aircraft tires, and the method comprises the steps: outputting an interlayer pixel-level model; extracting basic parameters of a tire shoulder area; tire shoulder heat generation simulation is executed, and a tire shoulder area temperature distribution cloud picture is output; positioning the highest temperature extreme value and the coordinate position of the high-temperature accumulation area; taking minimization of the maximum temperature extreme value as a heat generation temperature optimization target, taking a condition that the area of a high-temperature accumulation area is smaller than 15% of the total area of a tire shoulder area as a heat generation range constraint condition, and setting a parameter adjustment vector array of basic parameters of the tire shoulder area; executing particle swarm iterative optimization, and outputting tire shoulder optimization correlation parameters; and outputting the thermodynamic optimization parameters of the tire shoulder. According to the method, the technical problem that the durability and the critical speed of the tire are finally affected due to the fact that a macroscopic model is mostly adopted for calculation in an aviation tire shoulder heat generation optimization method in the prior art, and a detailed physical process between different hierarchical structures is ignored is solved.

The invention relates to the technical field of tire simulation design, in particular to a radial tire contour rapid design and generation method and system and a computer program. According to the method, firstly, a finite element model is generated according to a material distribution diagram of an original tire, then tire outer contour parameters are adjusted according to a preset performance target, and a corresponding basic vector model is generated. The method comprises the following steps: extracting node information of an original model and a basic vector model, endowing a weight coefficient, and calculating a tire finite element model with target performance; and finally, determining an optimal weight coefficient by using an optimization algorithm, and generating a tire outer contour curve meeting performance requirements through curve fitting. According to the method, the design efficiency is remarkably improved, the dependence on the personal ability of designers is reduced, and more accurate and reliable tire optimization design is achieved.

The invention provides sound-absorbing cotton containing a ribbon, a mute tire and an assembly method, belongs to the technical field of mute tires, and can solve the problems that the sound-absorbing cotton is complex in treatment process before being pasted, glue or gum and the like are high in cost, the sound-absorbing cotton is difficult to disassemble, the mounting firmness is poor, and the sound-absorbing cotton is easy to fall off. According to the technical scheme, the sound-absorbing cotton containing the ribbons is characterized in that the ribbons are arranged on the surface of a sound-absorbing cotton mounting plane in a matrix mode, the ribbon column number q and the ribbon row number p meet the # imgabs0 # formula, p represents the ribbon row number of the sound-absorbing cotton, and the value is an integer; f represents the total tension value required to be provided by the sound-absorbing cotton under the limit working condition; fm represents the maximum load of the stress position of the sound-absorbing cotton; b represents the numerical safety multiple of the sound-absorbing cotton ribbon; q represents the column number of the sound-absorbing cotton ribbons, and the value range of q is 8-10. The sound-absorbing cotton containing the ribbon is applied to preparation of a mute tire, the sound-absorbing cotton containing the ribbon and the tire are installed and fixed in a fixed knot mode, and the sound-absorbing cotton containing the ribbon has the advantages that the manufacturing process is simplified, the production cost is reduced, and the production efficiency is improved.

The invention relates to the technical field of modeling, in particular to an automobile tire modeling method and system and a storage medium, and the method comprises the steps: 1, obtaining tire contour data; step 2, extracting tire cross-section image features: extracting feature vectors of the two-dimensional tire cross-section image based on the point cloud image, and calculating the distance between the feature vectors; the similarity between the images is judged based on the distance, and the tire point cloud is segmented into a tire surface point cloud and a pattern groove point cloud according to the similarity; step 3, constructing a tread point cloud mapping matrix; 4, fitting a pattern boundary curve; step 5, determining the distribution of a tire material layer: segmenting the tire material layer by using a DeepLabV3 +-based network structure in combination with geometric features obtained from the tread point cloud mapping matrix to obtain the distribution condition of the tire material layer; and step 6, training and verifying the model, and obtaining an automobile tire finite element model after verification is passed. The precision of the finite element model of the automobile tire is improved.

The invention discloses a wheel design evaluation method and a wheel design evaluation system based on model simulation, and belongs to the technical field of wheel design evaluation. According to an existing wheel evaluation scheme, an initial wheel structure needs to be obtained firstly, then wheel optimization can be carried out, and the wheel design evaluation efficiency is affected. According to the wheel design evaluation method based on model simulation, the wheel design acquisition model, the simulation wheel generation model, the numerical simulation model and the wheel evaluation model are established, and the wheel design can be directly evaluated according to the two-dimensional wheel design image, so that the wheel design evaluation efficiency is effectively improved; and the wheel research and development design period is shortened. Furthermore, by applying the method provided by the invention, an industrial designer can evaluate the engineering performance of the two-dimensional wheel design in time, so that an optimal concept design scheme can be directly screened out, and the wheel design scheme can be improved according to an evaluation result, thereby effectively improving the wheel design quality and reducing the wheel research and development time.

The invention discloses a gradient negative Poisson's ratio non-pneumatic tire rigidity prediction method which comprises the following steps: creating a negative Poisson's ratio non-pneumatic tire model in finite element simulation analysis software, setting material attributes of a negative Poisson's ratio non-pneumatic tire, carrying out grid division on the model, establishing a static force general analysis step in an analysis step module of the software, and carrying out static force general analysis on the negative Poisson's ratio non-pneumatic tire. Setting load and boundary conditions; carrying out static simulation analysis on the non-pneumatic tire, and researching the influence of structural parameters on the performance of the negative Poisson's ratio non-pneumatic tire; carrying out sensitivity analysis on the rigidity of the tire according to four structural parameters of the tire, namely the gradient of the support body, the thickness of the support body, the thickness of the tread and the thickness of the reinforcing layer; establishing a BP neural network model to predict the radial rigidity of the tire; according to the method, the relationship between the structural parameters of the negative Poisson's ratio non-pneumatic tire and the radial stiffness of the tire is searched by utilizing the BP neural network, the radial stiffness value can be quickly and accurately predicted, the step of finite element simulation analysis and calculation is omitted, and the efficiency is greatly improved.

To provide a tire, which is configured so that a communication device can be suppressed from being damaged due to heat evolved inside the tire during rolling.SOLUTION: The tire comprises a side reinforcement rubber 2 with a crescent-shaped cross section, arranged in a side wall part 1b of the tire, and a communication device 10 buried inside the tire. The side reinforcement rubber has a side reinforcement rubber joined part ate which end parts in a tire circumferential direction of the side reinforcement rubber are joined to each other. The whole of the communication device is positioned in a predetermined region Kr in the tire circumferential direction extending from a center in the tire circumferential direction of the side reinforcement rubber joined part to a tire-angle range of 90° with a predetermined position Kb in the tire circumferential direction away by 180° from the center as a center.SELECTED DRAWING: Figure 1

The utility model discloses an anti-puncture rubber tire, which comprises a main tire and an outer-layer rubber tread, the outer-layer rubber tread is positioned on the periphery of the main tire, the main tire is connected with the outer-layer rubber tread through a plurality of groups of spokes, the main tire comprises a tread part, an inner layer is arranged on the inner side surface of the tread part, and an outer layer is arranged on the outer side surface of the tread part. A sealant layer is filled between the inner layer and the inner side surface of the tread part, and the inner layer comprises a dividing strip assembly; the outer-layer rubber tread is in contact with the ground, and a gap formed by the avoiding cavity is formed between the outer-layer rubber tread and the main tire, so that a sharp object is blocked by the outer-layer rubber tread when being punctured into the outer-layer rubber tread and is not easy to puncture into the tread part of the main tire, and the puncture prevention of the main tire is realized; the self-repairing of the tire is realized by the sealant layer depending on the viscosity of the sealant layer; and the sealant layers are filled in the multiple groups of separation cavities in a split manner, so that the influence of the mobility of the sealant layers on the dynamic balance of the tire is reduced.

The invention discloses special mute cotton for tires, which comprises a mute layer and a back adhesive tape, and the back adhesive tape is prepared from the following substances in parts by mass: 80-100 parts of styrene-butadiene-styrene block copolymer, 50-60 parts of tackifier, 20-30 parts of naphthenic oil, 5-15 parts of adsorbent, 1-2 parts of antioxidant 1520 and 1-2 parts of cross-linking agent. The prepared mute cotton does not need laser treatment and polishing, can effectively absorb a release agent on the inner wall of a tire, the bonding effect can reach cohesive failure of a self-adhesive layer, revolutionary change is achieved, tire agents, tire stores and even vehicle owners can operate the mute cotton by themselves, equipment assistance is not needed, construction is simple, cost is low, and large-scale popularization can be achieved.

A tire failure determination method according to the present disclosure is executed by a computer and includes: acquiring a thermal image of a tire captured by a thermographic camera; acquiring the internal temperature of the tire; and estimating the depth of a damaged portion of the tire in the thermal image on the basis of the surface temperature of the damaged portion and the internal temperature at a time when the thermal image was captured.

To provide a uniformity estimation method and a uniformity testing device capable of highly accurately estimating uniformity at a first revolution speed greater than a second revolution speed based on a measurement result of the uniformity at the second revolution speed.SOLUTION: An arithmetic unit of a uniformity testing device includes: Fourier transforming medium-speed time-domain waveform data acquired by a measurement part into a medium-speed frequency-domain waveform data and decomposing it into first to seventh order components (S3: an analysis step); correcting amplitudes of the decomposed first to seventh order components by using correction amplification ratios individually determined for the respective first to seventh order components (S4: a correction step); and synthesizing the corrected first to seventh order components to create high-speed frequency-domain waveform data, inverse Fourier transforming the created high-speed frequency-domain waveform data, and calculating a high-speed time-domain waveform data (S5: a component synthesis step, S6: inverse Fourier transformation, S7: high-speed time-domain waveform data calculation step).SELECTED DRAWING: Figure 10

The present invention provides a tire processing device, a tire repair device, a repair sheet, a tire repair method, and a tire manufacturing method. The tire repair device (10) of the present invention comprises: a tire support portion (15) that rotatably supports a pneumatic tire (5); and an attachment mechanism (18) that causes a softening additive to adhere to a tread portion (5A) of the pneumatic tire (5) supported by the tire support portion (15) so that the additive permeates the tread portion (5A).

The invention relates to the technical field of overhead working trucks, and particularly discloses a special damping wheel for an overhead working truck, which comprises a rim, the front side of the rim is fixedly connected with a joint, the inner side of the joint is fixedly connected with a shaft washer, and the rear side of the rim is fixedly connected with a reinforcing ring. A connecting shaft is movably inserted in the position, close to the center, of the inner side of the shaft ring, six sets of bolts are movably arranged on the inner side of the shaft ring, adjusting mechanisms are arranged on the inner side and the outer side of the rim, an auxiliary mechanism is arranged on the front side of the connecting position, and each adjusting mechanism comprises a power source fixedly installed on the inner side of the rim. According to the special damping wheel for the overhead working truck, through mutual cooperation of the adjusting mechanism and the auxiliary mechanism, the contact area between the wheel and the road surface can be increased when the overhead working truck is on a rugged road section, and the contact area between the wheel and the road surface can be automatically reduced when the overhead working truck is on a flat road section; and sideslip between the wheels and ground sludge is avoided through the insertion rods.

To enable a compact device structure to highly accurately measure a grounding state of a tire.SOLUTION: A tire grounding state measurement device 10 comprises: a pseudo road surface plate 12 that has a pseudo road surface 12A; a support shaft 16 that supports a tire 1 in a groundable way on the pseudo road surface 12A in an upper part of the road surface plate; a pair-of-shaft supports 18 that horizontally supports a support shaft 16 on both sides in a shaft direction of the tire 1; an expansion / contraction mechanism unit 52 and a load adjustment unit 54 that serve as load giving means for causing tensile force pulling the support shaft 16 downward to act on the pair of shaft supports 18 and applying a load to the tire 1; a pair-of-load cells 60 that is put to the pair of shaft support 18 to detect the tensile force; a load calculation unit 62 that calculates a load to be applied to the tire 1 on the basis of the detected tensile force; and a picture-taking device 32 that is disposed below the pseudo road surface plate 12, and detects an electromagnetic wave to optically take pictures.SELECTED DRAWING: Figure 1

A tire with low cavity noise, the tire comprising: a tire (1) having a cavity noise reduction device; a silencing element (2); and an adhesive (3), wherein the silencing element (2) is in the shape of a long strip, and is helically attached to the inner wall of the tire (1) by means of the adhesive (3). Further disclosed is a tire processing device. The aim of increasing the contact area between the silencing element and the air inside the tire can be achieved by controlling the spacing width between two sections of the silencing element and the thickness of the silencing element; as the silencing element is prepared in the shape of a long strip and is entirely wound around and attached to the inner wall of the tire, the silencing element has only two end points on the inner wall of the tire, thus reducing the risk of conventional tires with low cavity noise being damaged due to having a large number of end points; in addition, as the width of the silencing element is reduced compared with the width of silencing elements in conventional tires with low cavity noise, the stress concentration at the end points is reduced, and the damage risk at the end points is further reduced.

A retreadability determination method includes a step (S1) of acquiring a state characteristic value, indicating a state of the tire, to be used in a first determination and a second determination, a step (S2) of executing the first determination, and a step (S9) of executing the second determination in a case in which it is determined in the first determination that the tire can be retreaded. The first determination is one of a chemical degradation state determination using a residual durability of the base tire calculated based on a chemical change in rubber material of the tire and a physical degradation state determination using a residual durability of the base tire calculated based on a state of physical damage to the tire, and the second determination is the other of the chemical degradation state determination and the physical degradation state determination.

The invention discloses a tire wear degree estimation method based on in-tire strain, which comprises the following steps: modeling through finite element analysis software to obtain three-dimensional tire models with different wear degrees, extracting strain data of the three-dimensional tire models under different working conditions (air pressure, load and speed), and drawing a curve graph to extract features; and carrying out correlation analysis on the extracted features and tire wear, selecting features with relatively high correlation with the tire wear as regression analysis features, taking the air pressure, the load, the speed and the regression analysis features as input quantities, and taking the tire wear degree as an output quantity to train and construct a tire wear degree estimation model. And estimating the wear degree of the tire by using the established model, and verifying the validity of the model by using actual test data. According to the method, the tire wear degree estimation result is more accurate, and the method can better adapt to tire wear degree estimation under complex working conditions.

To provide a tire fatigue life prediction method high in prediction accuracy.SOLUTION: This tire fatigue life prediction method comprises: a generation step of generating a fatigue life estimation line representing a relationship between breaking energy of a vulcanized rubber material and a repetition number using a strain energy density function of the vulcanized rubber material constituting a tire, a cracking progress speed, tear energy, and a strain energy density; an acquisition step of acquiring the strain amplitude of one round of a tire model during grounding for the tire model constituted by an element which can be numerically analyzed by a computer representing the tire; and an estimation step of estimating a fatigue life by applying a value of the strain amplitude acquired in the acquisition step to the fatigue life estimation line.SELECTED DRAWING: Figure 6

The invention discloses a tire mold design method which comprises the following steps: acquiring a historical design log of a tire mold, determining a correlation degree between historical design parameters and preset performance indexes according to the historical design log, and obtaining feature design parameters of each preset performance index according to the correlation degree; calculating an application evaluation value of the feature design parameter of each preset performance index, and determining an optimal design parameter corresponding to the preset performance index according to the application evaluation value; generating a first design strategy by using the optimal design parameters of the plurality of preset performance indexes, carrying out analogue simulation on the first design strategy, and judging whether an adjustment instruction is generated or not according to an analogue simulation result; if the adjusting instruction is generated, the first design strategy is adjusted according to the adjusting instruction, the second design strategy is generated, if the adjusting instruction is not generated, the tire mold is machined according to the first design strategy, the quality and design efficiency of the tire mold are improved, and the production efficiency of the tire is further improved.

To provide a feature capable of improving the estimation accuracy of a magic formula model used as a tire characteristic model.SOLUTION: This tire characteristic model identification method comprises: a pre-processing step; a first identification step; and a second identification step. In the pre-processing step, a first parameter group is identified in a basic formula of a magic formula model, and a second parameter group is derived using a detailed formula of the magic formula model on the basis of the first parameter group. In the first identification step, setting the second parameter group derived in the pre-processing step as an initial value and a representative parameter in the second parameter group variable, identification is carried out using the basic formula and the detailed formula. In the second identification step, setting the second parameter group updated in the first identification as an initial value and at least one of a load dependent parameter, a camber angle dependent parameter, and an inner pressure parameter variable, identification is carried out using the basic formula and the detailed formula.SELECTED DRAWING: Figure 3

To provide a tire, which is configured so that a communication device can be suppressed from being damaged due to deformation of the tire during rolling.SOLUTION: The tire comprises a side reinforcement rubber 2 with a crescent-shaped cross section, arranged in a side wall part 1b of the tire, and a communication device 10 buried inside the tire. The side reinforcement rubber has a side reinforcement rubber joined part 2j having end parts in a tire circumferential direction of the side reinforcement rubber joined to each other. In a projection plane on which the tire is projected in the tire width direction, at least a portion of the communication device is overlapping with the side reinforcement rubber joined part.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of tire design, and discloses a mining wide-body vehicle tire crown carcass contour design method and system, and the method comprises the steps: collecting data to construct a working condition pedigree, carrying out load analysis to obtain an inflation equilibrium state target contour, and forming a crown stress-strain ideal distribution domain; surveying and mapping a material rigidity change mapping table, constructing a deformation matrix, and reversely solving to obtain an initial contour map of the mold; dividing crown carcass curvature partitions, carrying out crown stress analysis, and carrying out matching evaluation to form a deviation correction parameter set; a contour design scheme is accurately corrected, inflation deformation is simulated, and a final crown carcass contour map is obtained through adaptability evaluation selection. According to the method, through combination of mechanical analysis and material characteristics, accurate contour control of the tire from design to production is achieved, and the durability and working condition adaptability of the tire of the mining wide-body vehicle are improved.

The utility model relates to the technical field of improving the mute effect of an automobile tire, and discloses a mute structure for improving the mute effect of the automobile tire, mute cotton formed by a polyurethane matrix is embedded in the inner wall of the tire, the matrix is provided with micropores, and reinforced fibers are respectively arranged in the transverse direction and the longitudinal direction of the matrix. And the polyurethane matrix is bonded with the inner wall of the tire through a glue layer. The silence cotton can effectively absorb and disperse vibration and noise generated in the running process of the tire through the combination of the micropore structure and the reinforced fibers. In addition, the use of the polyurethane matrix ensures that the mute cotton has good elasticity and durability, so that the mute effect of the mute cotton is kept in long-term use. According to the utility model, not only is the comfort of the automobile improved, but also the noise pollution to the environment is reduced. By adopting the organic silicon sealing glue as the bonding layer, the tight combination of the mute cotton and the inner wall of the tire is ensured, the abnormal sound possibly generated in the driving process is avoided, and the high practical value and the market application prospect are achieved.

The invention relates to the technical field of intelligent driving, in particular to an intelligent non-pneumatic tire damage diagnosis method and system based on wavelet packet energy. Vibration signals of the intelligent non-pneumatic tire in the health state and different local damage states are obtained; the method comprises the following steps: processing an original vibration signal by adopting a wavelet signal de-noising method, selecting a proper wavelet basis function according to the characteristics of the signal and the characteristics needing to be highlighted, carrying out wavelet decomposition on the original vibration signal, and solving a wavelet coefficient of each node; calculating the energy of each node and the total energy, and solving the energy ratio of each node; and establishing a wavelet packet total energy change rate WER, comparing RES values, and judging the damage degree of the intelligent non-pneumatic tire. According to the invention, the precision and efficiency of damage identification of the intelligent non-pneumatic tire are improved, and powerful technical support is provided for application of the non-pneumatic tire in the field of intelligent driving.

The invention belongs to the field of wheel road tests and bench tests, and particularly relates to a wheel bench impact test method and system equivalent to test field road impact. The method comprises the following steps: determining a road impact condition of a vehicle for road test; the road impact working condition is reproduced; in the reproduced road impact working condition, simulation prediction of rack impact test energy is carried out; and generating a bench impact test scheme based on a simulation prediction result. Compared with a traditional road test, the method has the same test effect, the test period can be greatly shortened, test resources and cost are saved, potential risks of the wheel road test are found in advance, and a necessary rapid test verification means is provided for wheel design and verification. The assessment of the road test on the wheel is equivalent to the bench test, the reliability of the road test on the wheel is verified before the whole vehicle road test, the risk of failure of the wheel in the whole vehicle road test stage is reduced, and the method is wide in application range, simple, reliable and low in cost.

A method for electronically diagnosing an electric drive chain for an electric or hybrid motor vehicle. The drive chain including an electric battery, an electric machine, an inverter connected between the battery and the electric machine, and a link capacitor connected in parallel between the battery and the inverter. The diagnosis method includes: i) continuously controlling the increase in the control frequency of the electric machine; ii) determining the variation in the Fourier transform of the current variation between the assembly comprising the battery and the link capacitor and between the inverter; iii) for each control frequency: 1) detecting an anomaly; 2) otherwise, determining when the control frequency value is optimal.