The invention describes a releasable wheel mount system for a rollator comprising a wheel axel (1) fastened to a frame (2) comprising a groove (3) near an outer end of the wheel axel (1) and a circular sloped gliding surface (25) at the outer end. The system further comprises a release trigger (4) engaging the groove (4) by means a locking shape (5) locking the release trigger (4) and wheel axel (1) to each other, and releasing the release trigger (4) from the wheel axel (1) a releasing shape (6). The system further comprises a housing (7) with a central cylinder (8) with a cavity accommodating the wheel axel (1), an outer (9) and inner (10) rim stopper, and a trigger cavity (11) accommodating the release trigger, thus locking the release trigger (4) and housing (7) to each other and to the wheel axel.

A braking system for a vehicle includes a first axle attached to a chassis and rotatably supporting two front wheels, with a first brake including a first electronic brake controller for controlling application of braking to the front wheels. A second axle rotatably supports two rear wheels and is detachably connected to the chassis and has a second electronic brake controller and a second brake attached thereto for braking the rear wheels. Each of the electronic brake controllers has an independent power source. The system also includes an electronic park brake controller and parking brake. A vehicle control unit is in communication with each of the electronic brake controllers for coordinating control of the braking system. One or more communications network cables, which may be wired or wireless, connect the electronic brake controllers. An electrical connector allows for swapping the second axle, which requires no fluidic connections.

A collapsible support structure includes at least a horizontal support structure, a vertical support structure, and an axle assembly. In use, the collapsible support structure may be folded/unfolded between a deployed configuration, in which the collapsible support structure may be capable of rolling along a support surface to transport items, and a stowed/storage position, in which the collapsible support structure is collapsed in a compact geometry for storage. The axle assembly enables removal of the wheels from the axle for storage of the collapsible support structure. The axle may be repositionable between a deployed position and a storage position. The axle may be equipped with a retainer unit that retains the axle in the deployed position.

An axle assembly, including: an axle sleeve having first end face; a second end face axially spaced from said first end face and an axially extending opening therethrough;a control shaft assembly including: a control shaft and an engagement element having an engagement surface. The engagement element is axially retained to the control shaft. The control shaft assembly extends within the opening to be axially overlapping the axle sleeve. The engagement element has a restraining engagement with the axle sleeve at an engagement interface between the engagement surface and opening; the restraining engagement providing a restraining resistance to restrain axial displacement between the control shaft and axle sleeve. The engagement element fully circumscribes the control shaft about the axial axis and is radially self-supporting.

This axle beam is provided with a pair of horizontal plate sections separated vertically from and facing each other; and a vertical plate section extending vertically so as to connect intermediate sections, in a front-rear direction, of the pair of horizontal plate sections. The horizontal plate section on the upper side has a forwardly extending upper front plate section and a rearwardly extending upper rear plate section, and the horizontal plate section on the lower side has a forwardly extending lower front plate section and a rearwardly extending lower rear plate section. One of the upper front plate section, the upper rear plate section, the lower front plate section, and the lower rear plate section is set to have a smaller length in the front-rear direction than the other three plate sections, and among the other three plate sections, the two plate sections which are separated vertically from and facing each other are set to have substantially the same length in the front-rear direction.

An axle bearing carrier assembly having a swing arm of unitary construction that operatively associates with an adjustable tension plate for selectively connecting one of two different types of axle bearing carriers to the swing arm.

A rear wheel (1) for a powered two-wheeler has a hub (3), a rim (4) which has a rim well (5) and two rim flanges (6) terminating the rim (4) on both sides, at least one connecting element (7) for connecting the hub (3) to the rim (4), an interface (8) for attaching the rear wheel (1) to the two-wheeler, and receptacles (9, 10) provided on both sides of the rear wheel (1) for receiving a brake disc (11) and/or a drive element (12) serving to rotate the rear wheel (1). The receptacles (9, 10) on both sides are identical to one another.

An axle adapter assembly, configured for enabling conversion of an axle installed on a vehicle to fit different center bore sizes of wheel hubs, including: an axle configured for coupling dropouts of fork legs of a lower fork; adapters configured for being inserted within the dropouts; the adapters configured for engaging an outer surface of the axle and retaining the axle upon engagement; and axle pinch shims configured for being inserted into slits of the dropouts and the adapters, wherein upon the insertion, the adapters are aligned with the dropouts, such that shoulders of the adapters retain edges of a wheel hub of the wheel hubs.

A gate roller assembly includes a bracket that has a vertical portion and a horizontal portion. The vertical portion is positioned against a gate having the horizontal portion extending away from the gate. A plurality of bolts is provided and each of the bolts extends through the vertical portion of the bracket to engage the gate for retaining the bracket on the gate. A plurality of nuts is provided and each of the nuts threadably engages a respective one of the bolts for retaining the first plate on the gate. A roller is rotatably disposed on the horizontal portion of the bracket to roll along the support surface when the gate is opened or closed.

Vehicles are disclosed which have a lower center of gravity than existing all-terrain, amphibious, and unmanned ground vehicles due to the location of propulsion units and other vehicle components inside the wheels of the vehicle. The vehicles can climb over large obstacles yet are also able to corner at high speeds. The vehicles can be configured for direct manual operation or operation by remote control, and can also be configured for a wide variety of missions.