A portable laser emitter, laser target, and method for measuring the toe angle of a commercial truck steer axle are disclosed. The laser emitter is mounted to the wheel of a truck steer axle while the laser target is placed in front of the truck. Measurements are taken of the laser dot position on the target with the emitter mounted at either end of the steer axle. The process is then repeated with the target positioned behind the truck. The measurements taken from either end of the steer axle with both front and rear target positions are compared to determine the toe angle of the steer axle.

The disclosure provides a tire centering fixture including: a gear, a first rack, a second rack, a third rack, a shaft sleeve, and a guide cylinder. The first rack, the second rack, and the third rack are engaged with the gear. The gear is disposed around the shaft sleeve; the gear and the shaft sleeve are disposed on the guide cylinder. The guide cylinder includes a central cavity and a base wall. The base wall includes a central hole and a circular recess; a lower end of the shaft sleeve is in movable fit with the circular recess of the base wall, and a lower end face thereof is flush with the bottom surface of the circular recess. A locating base is disposed on the upper end face of the guide cylinder and is fixed on the guide cylinder. The locating base functions as an end cover.

A maintenance assembly for a wheel assembly of an amusement ride vehicle includes a foundational body, a wheel engagement section extending a first distance from the foundational body, and a datum section including a protrusion extending a second distance from the foundational body. The wheel engagement section is configured to contact a wheel surface of the wheel assembly, and the datum section is configured to contact a pad of the wheel assembly. Additionally, the wheel engagement section is rigidly positioned with respect to the datum section, and the second distance is greater than the first distance, such that the maintenance assembly provides a fixed distance between a surface of the datum section configured to contact the pad and a surface of the wheel engagement section configured to contact the wheel surface.

A radar sensing system for estimating one or more of a vehicle's wheel parameters, including an antenna subsystem comprising one or more RF (Radio Frequency) antennas configured and enabled to transmit one or more RF signals from at least one RF antenna towards one or more selected directions or points and obtain reflected or affected plurality of RF signals from the one or more selected directions or points, a data acquisition subsystem configured and enabled to measure the axle-to-ground clearance and the axle-to-chassis clearance, and one or more processors configured and enabled to estimate the one or more of the vehicle's wheel parameters.

The present invention relates to a method for determining spindle angles of a steerable wheel axle arrangement. In particular, by means of the method, an image of at least one wheel axle optical marker arranged in connection with a wheel axle and an image of a spindle optical marker arranged in connection with the spindle is acquired, where after rotation of the spindle, center of rotation and an axis of rotation of the spindle can be determined.

A vehicle wheel alignment system and method is provided for performing a rolling wheel axis of rotation and wheel spindle point calculation every time an alignment is performed. Embodiments include an aligner having a target fixedly attachable to a wheel of the vehicle; a camera for viewing the target and capturing image data of the target; and a data processor. The data processor receives the image data from the camera, and determines a vector pointing from the target origin to a wheel spindle point based on the captured target image data, when the vehicle is rolled while the wheel is on a substantially flat surface such that the wheel and target rotate a number of degrees. The data processor is further adapted to calculate an alignment parameter for the vehicle based at least in part on the wheel axis of rotation and the coordinates of the wheel spindle point.

The present invention relates to a method for determining spindle angles of a steerable wheel axle arrangement. In particular, by means of the method, an image of at least one wheel axle optical marker arranged in connection with a wheel axle and an image of a spindle optical marker arranged in connection with the spindle is acquired, where after rotation of the spindle, center of rotation and an axis of rotation of the spindle can be determined.

A vehicle wheel alignment system and method is provided for performing a rolling wheel axis of rotation and wheel spindle point calculation every time an alignment is performed. Embodiments include an aligner having a target fixedly attachable to a wheel of the vehicle; a camera for viewing the target and capturing image data of the target; and a data processor. The data processor receives the image data from the camera, and determines a vector pointing from the target origin to a wheel spindle point based on the captured target image data, when the vehicle is rolled while the wheel is on a substantially flat surface such that the wheel and target rotate a number of degrees. The data processor is further adapted to calculate an alignment parameter for the vehicle based at least in part on the wheel axis of rotation and the coordinates of the wheel spindle point.

The invention relates to a method for maintenance of a vehicle, comprisingdetermining (S2, S8) the position, in a fixed coordinate system, of at least one first part (2011, 4, 3011) of a vehicle,characterized by determining (S3) the identity of the vehicle,retrieving (S4, S10), by means of the vehicle identity, spatial data indicating how a second part (202, 2011, 4) of the vehicle is spatially related to the first part (201), anddetermining (S8, S11) the position, in the fixed coordinate system, of the second part (202, 2011, 4) based at least partly on the first part position and the spatial data.

The present invention relates to the technical field of automobile maintenance and device demarcation, and discloses a device and a method for demarcating a center line of an automobile body, the demarcation device including a holder apparatus and a laser. The holder apparatus includes a horizontal scale, and the laser is installed on the automobile body and is configured to emit a laser beam to the horizontal scale. According to the device for demarcating a center line of an automobile body, the lasers may be installed on wheels on both sides of an automobile, two laser beams equidistantly emitted using the wheels as reference points irradiate at the horizontal scale, and the holder apparatus may be moved to an appropriate position according to a graduation of the horizontal scale, thereby facilitating demarcation of the center line of the automobile.