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82 results about "Tire balance" patented technology

Tire balance, also called tire unbalance or tire imbalance, describes the distribution of mass within an automobile tire or the entire wheel (including the rim) on which it is mounted. When the wheel rotates, asymmetries in its mass distribution may cause it to apply periodic forces and torques to the axle, which can cause ride disturbances, usually as vertical and lateral vibrations, and this may also cause the steering wheel to oscillate. The frequency and magnitude of this ride disturbance usually increases with speed, and vehicle suspensions may become excited when the rotating frequency of the wheel equals the resonant frequency of the suspension.

Tyre balancing compositions

The invention relates to tyre balancing compositions having improved balancing properties comprise a visco-plastic gel and solid bodies having an average smallest dimension in the range of 0.5-5 mm; preferably 1-4 mm, more preferably around 3 mm. When applied in a layer to the inside of a motor vehicle tyre, the compositions act by allowing the solid bodies move through the gel and to concentrate in areas to counteract imbalances. The solid bodies preferably have an average ratio α between their smallest and their largest dimension of α≦2, more preferably α≦1.5, especially around 1. The visco-plastic gel preferably has a storage modulus (G′) between 1000 Pa and 25000 Pa at 22° C., a loss modulus (G″) smaller than the storage modulus, and a critical yield stress above 3 Pa at 22° C. The bodies may be shaped as prolate or oblate ellipsoids, cylinders, rectangular paralleipipeds, or spheres, or mixtures of such bodies; they may have an apparent specific gravity in the range of 500-3000 kg/m3, preferably 600-2000 kg/m3, in particular 700-1000 kg/m3, especially 800-900 kg/m3; they may be made from polyolefins, polystyrene, polyvinyl chloride, polyamide, rubber or glass. The weight ratio between the solid bodies and the gel is from 10:1 to 1:10, preferably from 5:1 to 1:5, in particular from 2:1 to 3:1, such as from 1:1 to 1:2. The invention further concerns a tyre balancing kit and a method for balancing automobile wheel assemblies.
Owner:LARS BERTIL CARNEHAMMAR

Tire balancing apparatus

A machine and method for performing balancing measurements on a tire or tire/wheel assembly that includes a structure defining spaced apart tire centering and tire testing positions. A first conveyor moves a tire to a centering position where a shuttle assembly is operative to center the tire and, after it has been centered, engages the tire and effects the transfer of the tire from the centering station to a testing station. The shuttle assembly includes a pair of grippers that move towards and away from each other, in a lateral direction in order to engage the tire. The first conveyor permits movement of the tire in a lateral direction; whereas it substantially resists relative movement between the tire and conveyor in the longitudinal direction, i.e., the direction of movement of the conveyor. The shuttle assembly is mounted for movement in a longitudinal direction and includes a drive mechanism which allows the shuttle assembly to move relative to a tire in a longitudinal direction as the grippers engage the tire so that the shuttle assembly can align itself, in the longitudinal direction with respect to the tire. The frame structure of the machine includes three spaced apart support members providing a three point support arrangement for the machine. The machine also includes at least four legs which extend downwardly, but are spaced above a plane defined by the support members and inhibit tipping of the machine beyond predetermined limits. The testing station which includes a spindle assembly for rotating the tire also includes an elevator mechanism for lowering the tire on to the spindle and for raising the tire off the spindle. A lower marking mechanism forms part of the elevator and is operative to mark a predetermined location on the tire at the conclusion of a tire testing procedure. The spindle assembly includes a drive motor comprised of a drive motor housing and an armature. The armature is maintained in its operative position by a bearing arrangement associated with a shaft assembly forming part of the spindle assembly which eliminates the need for armature supporting bearings in the drive motor housing.
Owner:MICRO POISE MEASUREMENT SYST

Tire balancing apparatus

A machine and method for performing balancing measurements on a tire or tire / wheel assembly that includes a structure defining spaced apart tire centering and tire testing positions. A first conveyor moves a tire to a centering position where a shuttle assembly is operative to center the tire and, after it has been centered, engages the tire and effects the transfer of the tire from the centering station to a testing station. The shuttle assembly includes a pair of grippers that move towards and away from each other, in a lateral direction in order to engage the tire. The first conveyor permits movement of the tire in a lateral direction; whereas it substantially resists relative movement between the tire and conveyor in the longitudinal direction, i.e., the direction of movement of the conveyor. The shuttle assembly is mounted for movement in a longitudinal direction and includes a drive mechanism which allows the shuttle assembly to move relative to a tire in a longitudinal direction as the grippers engage the tire so that the shuttle assembly can align itself, in the longitudinal direction with respect to the tire. The frame structure of the machine includes three spaced apart support members providing a three point support arrangement for the machine. The machine also includes at least four legs which extend downwardly, but are spaced above a plane defined by the support members and inhibit tipping of the machine beyond predetermined limits. The testing station which includes a spindle assembly for rotating the tire also includes an elevator mechanism for lowering the tire on to the spindle and for raising the tire off the spindle. A lower marking mechanism forms part of the elevator and is operative to mark a predetermined location on the tire at the conclusion of a tire testing procedure. The spindle assembly includes a drive motor comprised of a drive motor housing and an armature. The armature is maintained in its operative position by a bearing arrangement associated with a shaft assembly forming part of the spindle assembly which eliminates the need for armature supporting bearings in the drive motor housing.
Owner:MICRO POISE MEASUREMENT SYST

Tyre balancing compositions

The invention relates to tyre balancing compositions having improved balancing properties comprise a visco-plastic gel and solid bodies having an average smallest dimension in the range of 0.5-5 mm; preferably 1-4 mm, more preferably around 3 mm. When applied in a layer to the inside of a motor vehicle tyre, the compositions act by allowing the solid bodies move through the gel and to concentrate in areas to counteract 10 imbalances. The solid bodies preferably have an average ratio a between their smallest and their largest dimension of α≦2, more preferably α≦1.5, especially around 1. The visco-plastic gel preferably has a storage modulus (G′) between 1000 Pa and 25000 Pa at 22° C., a loss modulus (G″) smaller than the storage modulus, and a critical yield stress above 3 Pa at 22° C. The bodies may be shaped as prolate or oblate ellipsoids, cylinders, 15 rectangular paralleipipeds, or spheres, or mixtures of such bodies; they may have an apparent specific gravity in the range of 500-3000 kg / m3, preferably 600-2000 kg / m3, in particular 700-1000 kg / m3, especially 800-900 kg / m3; they may be made from polyolefins, polystyrene, polyvinyl chloride, polyamide, rubber or glass. The weight ratio between the solid bodies and the gel is from 10:1 to 1:10, preferably from 5:1 to 1:5, in particular from 20 2:1 to 3:1, such as from 1:1 to 1:2. The invention further concerns a tyre balancing kit and a method for balancing automobile wheel assemblies.
Owner:CARNEHAMMAR LARS BERTIL PROF DR

Laser measurement and positioning device and using method of wheel balancer

The invention discloses a laser measurement and positioning device and a using method of a wheel balancer. The laser measurement and positioning device adopts a stepping motor to drive a laser transmitter to rotate till laser is pointed to the inner side edge of a measured tire, calculates an optical distance by utilizing the time from laser transmitting and laser receiving according to an optical principle so as to obtain a straight line distance from a laser head to a laser indication point, utilizes a geometrical mathematic model to calculate tire parameters according to an installing position constant of the laser measurement and positioning device, achieves automatic measurement of various tire parameters and is accurate in measurement and simple in operation. After tire balance calculation is finished, a microprocessor is adopted to convert a triangular side function formed by the detected unbalance position and an original point of the laser transmitter into an angle differential parameter and then sends an instruction to the stepping motor, the stepping motor drives the laser transmitter to rotate to a converted angle, and the laser transmitter enables the laser to be transmitted onto the unbalance position so as to achieve laser positioning of the unbalance position of the measured tire.
Owner:科星汽车设备(珠海)有限公司

Tire shaft dynamic balance detection and correction device

The invention relates to the technical field of tire balancing machines, in particular to a tire shaft dynamic balance detection and correction device. The tire shaft dynamic balance detection and correction device comprises a balancing main machine, a material frame is arranged on the upper end face of the balancing main machine, a rocker arm is rotatably mounted on the left end face of the balancing main machine, a main rotating shaft is arranged on the upper side of the right end face of the balancing main machine, and a pair of guiding rails which are symmetrically in the front-rear direction and extend rightwards are vertically arranged at the lower end of the right side of the balancing main machine. The tire shaft dynamic balance detection and correction device has the beneficial effects that by arranging an auxiliary shaft adopting a connecting flange for connecting, quick mounting between the auxiliary shaft and the main rotating shaft is achieved, the detecting efficiency isfurther improved, and the mounting and demount processes are simplified; by arranging a sliding trolley with the lifting effect, meanwhile, a hydraulic cylinder is utilized to realize lifting of tires, and the purposes of labor saving and convenient and quick mounting are achieved; and by arranging cooperation of a module and a laser emitter, the tires, the auxiliary shaft and the laser source arelocated on the same axis, thus the tires are accurately mounted, the abrasion to the outer wall of the rotating shaft by the tires is avoided, and the detection precision is improved.
Owner:刘咏

Method for measuring amount of unbalance of tire dynamic balance and tire balancer

The embodiment of the invention discloses a method for measuring the amount of unbalance of tire dynamic balance, which comprises the following steps of: detecting an induction electrical signal of a main shaft connected with a tire in real time in a rotating process; if the rotating speed of the main shaft reaches a preset rotating speed threshold value and an identifier on the main shaft reaches a given position, sampling the induction electrical signal according to preset sampling information to obtain discrete data; calculating the amplitude and phase of the induction electrical signal according to the discrete data; calculating the magnitude and phase of an induced force corresponding to the induction electrical signal according to a linear model of corresponding relationships between the induced forces and the induction electrical signals; and calculating the magnitude and phase of the amount of unbalance of the tire on a corresponding corrected surface according to the magnitude and phase of the induced force and a balance principle. The embodiment of the invention also discloses a tire balancer. By the method of the tire balancer, the high-accuracy magnitude and phase of the amount of unbalance of the dynamic balance can be simply and conveniently measured and calculated.
Owner:LAUNCH SOFTWARE DEV

Passenger car tire balance point identification system

The invention provides a passenger car tire balance point identification system, thereby solving a technical problem that the existing equipment can not be upgraded and modified by the existing spot mark detection scheme in the prior art. The system comprises a conveyor belt, a photoelectric switch, an illumination source, a camera, an image analysis module and a comparison analysis module. The photoelectric switch includes a light-emitting assembly and a receiving assembly that are arranged at the two sides of the conveyor belt; the photoelectric switch is connected to the camera and triggersthe camera to work; the illumination source and the camera are arranged above the conveyor belt; and the illumination source and the camera work cooperatively. According to the system provided by theinvention, the camera is controlled by the photogate to work; and the structure is simple and the cost is low. A few of devices are installed for the conveyor belt and modification of most of existing spot mark devices can be realized. The camera exposure time is short and the picture definition is improved; with an HSV color model, the work difficulty of the image analysis module is reduced andthe working efficiency of the image analysis module is improved; and because of an externally arranged processing module, remote control of the identification system is realized.
Owner:上海深视信息科技有限公司
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