Methods and systems are provided for drivetrain of a vehicle. In one example, the drivetrain includes an axle shaft with a radial nub and a shaft guide surrounding the axle shaft. The shaft guide may have an inner radial groove configured to have an interference fit with the radial nub. When the axle shaft is axially translated along an axial direction to engage the radial nub with the inner radial groove of the shaft guide, the axle shaft may be disconnected from a wheel hub of the vehicle.

Methods and systems are provided for drivetrain of a vehicle. In one example, the drivetrain includes an axle shaft with a radial nub and a shaft guide surrounding the axle shaft. The shaft guide may have an inner radial groove configured to have an interference fit with the radial nub. When the axle shaft is axially translated along an axial direction to engage the radial nub with the inner radial groove of the shaft guide, the axle shaft may be disconnected from a wheel hub of the vehicle.

Methods and systems are provided for drivetrain of a vehicle. In one example, the drivetrain includes an axle shaft with a radial nub and a shaft guide surrounding the axle shaft. The shaft guide may have an inner radial groove configured to have an interference fit with the radial nub. When the axle shaft is axially translated along an axial direction to engage the radial nub with the inner radial groove of the shaft guide, the axle shaft may be disconnected from a wheel hub of the vehicle.

A hub or wheel assembly includes a retaining element, biasing element, and hand-maneuverable release mechanism. The housing includes an axle bore configured to receive an axle and a pin sleeve including a first end in fluid communication with the axle bore, a second end, and a conduit between the first end and the second end. The retaining element is within the conduit and is configured to operatively engage a groove in an axle. The biasing element is within the conduit and is configured to bias the retaining element towards the axle bore. The hand-maneuverable release mechanism is configured to displace the retaining element away from the axle bore.

A hub or wheel assembly includes a retaining element, biasing element, and hand-maneuverable release mechanism. The housing includes an axle bore configured to receive an axle and a pin sleeve including a first end in fluid communication with the axle bore, a second end, and a conduit between the first end and the second end. The retaining element is within the conduit and is configured to operatively engage a groove in an axle. The biasing element is within the conduit and is configured to bias the retaining element towards the axle bore. The hand-maneuverable release mechanism is configured to displace the retaining element away from the axle bore.

Two-piece axle shafts are disclosed. The shafts may include an outer ring including an outer portion and an inner portion recessed in the outer portion and having a first passage defined therein and an axle shaft including a bar and a flanged end having a second passage defined therein and forming a press fit with the outer ring. A fastener may extend within the first and second passages. The flanged end may have an outer perimeter that forms a press fit with a wall extending between the inner portion and the outer portion of the outer ring. The fasteners may be press-fit fasteners or threaded fasteners. In one embodiment, there may be a plurality of apertures in the inner portion and the flanged end and fasteners may extend through both apertures and secure to a wheel hub. The two-piece axle shaft may reduce transverse grain flow.

A roller unit having an integrated fastening portion includes a supporting shaft fastened to a containing body or a containing main body that can slide and having first and second flanges formed in multi steps with different outer diameters, a rotating body rotatably fixed to a side of the supporting shaft, and a washer coupled to a side of the rotating body to surround and fix the second flange, thereby preventing separation of the supporting shaft and the rotating body. Therefore, it is possible to more conveniently combine the supporting shaft and the rotating body and to prevent separation of the supporting shaft and the rotating body, whereby is possible to improve various functions.

A method and system for analyzing the press-fitting curve of American standard wheelset includes: acquiring American standard wheelset parameters, press-fitting parameters and pressure data, and establishing a wheelset press-fitting curve; acquiring a plurality of judgment items on the established curve, and analyzing the acquired judgment items according to a preset algorithm to obtain an analysis result, which can analyze all the curves of the end points, wave peaks, wave troughs, ascending and descending sections of the wheelset press-fitting curve. The method is simple to operate and convenient to use, and can automatically and accurately determine whether the curve meets the requirements. At the same time, the identification and determination of unqualified items of the curve provide a basis for the quality improvement of the subsequent press-fitting process, which promotes the quality improvement of wheelset press-fitting, avoids product repair, and further improves the press-fitting efficiency.

A method and system for analyzing the press-fitting curve of American standard wheelset includes: acquiring American standard wheelset parameters, press-fitting parameters and pressure data, and establishing a wheelset press-fitting curve; acquiring a plurality of judgment items on the established curve, and analyzing the acquired judgment items according to a preset algorithm to obtain an analysis result, which can analyze all the curves of the end points, wave peaks, wave troughs, ascending and descending sections of the wheelset press-fitting curve. The method is simple to operate and convenient to use, and can automatically and accurately determine whether the curve meets the requirements. At the same time, the identification and determination of unqualified items of the curve provide a basis for the quality improvement of the subsequent press-fitting process, which promotes the quality improvement of wheelset press-fitting, avoids product repair, and further improves the press-fitting efficiency.

Provided is a mobile X-ray apparatus which can be manually moved even in a case where a battery is exhausted. The mobile X-ray apparatus according to the present invention is configured to include a motor that drives a driving wheel of a mobile cart via a clutch, a battery that supplies electric power to the motor, a cart manipulation unit that manipulates movement of the mobile cart, and a selector switch that switches between two manipulation states which are a normal manipulation state and a manual manipulation state of the mobile cart. The motor is configured to brake when electric power stops being supplied from the battery. In a case where the manual manipulation state is selected, electric power stops being supplied from the battery to the motor, and the driving wheel and the motor can be controlled so as to be attached to and be detached from each other.