The present disclosure relates to a caster wheel assembly (1), comprising: a caster housing (3) provided with an axial channel, a spindle shaft (7) configured to be received by the channel of the caster housing (3), which spindle shaft (7) is inclined relative to the vertical plane when mounted in the caster housing (3) and the caster wheel assembly (1) is in use resting on a horizontal support, the caster housing (3) and the spindle shaft (7) being configured to rotate freely relative to each other, a caster wheel fork (9) having a wheel axle (11) configured to be arranged offset relative to a central axis of the spindle shaft (7), to provide a trail functionality, and a height adjustment mechanism (6) configured to adjust an axial position of the spindle shaft (7) relative to the caster housing (3) based on a rotational position of the spindle shaft (7) in relation to the caster housing (3).

A dual wheel swivel caster includes a swivel assembly, a horn, a rig hub, a solid axle, at least one ring of roller bearings, first and second wheel assemblies, and at least one ring of bearings. The first wheel assembly has a first wheel axis, and includes an annular plate element. The torque limiter is configured to rotatably couple the first and second wheel assemblies with the solid axle when the torque between the annular plate element and the torque limiter is below a preset value. The torque limiter is configured to rotatably decouple the first wheel assembly from the solid axle and the second wheel assembly when the torque exceeds the preset value. The ring of bearings is configured to allow the first wheel assembly to rotate independently of the solid axle and the second wheel assembly about the rotational axis when the torque exceeds the preset value.

A dual wheel swivel caster includes a swivel assembly, a horn, a rig hub, a solid axle, at least one ring of roller bearings, first and second wheel assemblies, and at least one ring of bearings. The first wheel assembly has a first wheel axis, and includes an annular plate element. The torque limiter is configured to rotatably couple the first and second wheel assemblies with the solid axle when the torque between the annular plate element and the torque limiter is below a preset value. The torque limiter is configured to rotatably decouple the first wheel assembly from the solid axle and the second wheel assembly when the torque exceeds the preset value. The ring of bearings is configured to allow the first wheel assembly to rotate independently of the solid axle and the second wheel assembly about the rotational axis when the torque exceeds the preset value.

An object of the invention is to provide a personal mobility that is able to turn by movement of the gravitational center of a passenger, without individually controlling each motor that drives the left and right wheels, and without using any special parts. The personal transporter includes left and right driving wheels (21) as front wheels, left and right casters (22) as rear wheels, and two motors (31) for independently driving the left and right driving wheels (21). By giving a camber angle, in which an upper part inclines inward when viewed from the front, with respect to the left and right casters (22), the torque or the applied voltage of the two motors (31) is the same, the caster (22) rotates in the direction of movement of gravitational center to act as a steering wheel, and it is possible to turn a personal transporter in the movement direction of the gravitational center.

An angle adjustment assembly comprises a first member configured to pivot about a first axis. A second member is configured to rotate about a second axis transverse to the first axis. The first member is eccentrically supported in relation to the second member so that rotation of the second member produces pivotal movement of the first member. A third member may be configured to rotate about a third axis transverse to the first axis. The second member may be eccentrically supported in relation to the third member so that rotation of the third member further produces pivotal movement of the first member. The second member may comprise an inner cam member. The third member may comprise an outer cam member. The first member may be a caster stem for supporting a wheelchair caster assembly, or alternatively, an axle receiver for supporting an axle of a wheelchair drive wheel.