The present disclosure relates to the technical field of mechanical equipment for aerial works, in particular to a small scissor aerial work platform and a traveling chassis thereof. The traveling chassis includes a base and oppositely-arranged left and right steering wheel assemblies. The base is of a concave structure, a scissor-stored groove with an upward opening is formed in the base, a left wheel set accommodating groove and a right wheel set accommodating groove which are used for accommodating the steering wheel assemblies and provided with downward openings are further formed in a front end of the base, and a lower portion of the scissor-stored groove is located between the left wheel set accommodating groove and the right wheel set accommodating groove.

The present disclosure relates to the technical field of mechanical equipment for aerial works, in particular to a small scissor aerial work platform and a traveling chassis thereof. The traveling chassis includes a base and oppositely-arranged left and right steering wheel assemblies. The base is of a concave structure, a scissor-stored groove with an upward opening is formed in the base, a left wheel set accommodating groove and a right wheel set accommodating groove which are used for accommodating the steering wheel assemblies and provided with downward openings are further formed in a front end of the base, and a lower portion of the scissor-stored groove is located between the left wheel set accommodating groove and the right wheel set accommodating groove.

A sensor device includes a main driving gear, a driven gear, a biasing member, a support member, a rotational angle sensor, and a magnetic shield. The driven gear includes a gear portion and a shaft portion. The shaft portion is provided with a permanent magnet. The biasing member is configured to bias the driven gear toward the main driving gear. The support member supports the driven gear and the biasing member. The magnetic shield rotatably surrounds the shaft portion. The biasing member biases the driven gear toward the main driving gear by biasing the magnetic shield toward the main driving gear. The sliding resistance between the magnetic shield and the driven gear is lower than the sliding resistance between the magnetic shield and the biasing member.

A rig movement, rotation and alignment assembly. A plurality of lifting jack assemblies are provided, each of the lifting jack assemblies attached to a rig substructure. Each of the lifting jack assemblies has a cylinder housing and a rod movable axially within the cylinder housing. Each rod is engaged with a screw drive in order to rotate the rod with respect to the cylinder housing. Each rod includes a circumferential recess wherein the circumferential recess includes at least one flat segment. A retainer plate attached to each bearing pad is received in and engaged with the circumferential recess and with the flat segment, so that rotation of the rod results in rotation of the bearing pad.

A steering assistance device includes: a steering angle sensor for detecting a steering angle of a vehicle; a motor for performing steering assistance of the vehicle by applying torque to a steering shaft; and a control unit for increasing increases the amount of steering assistance by the motor in case where the detected steering angle is included in an angular range corresponding to a steering play segment in which steering will not alter the direction of wheels of the vehicle as compared with a case where the detected steering angle is not included in an angular range.

A steering wheel actuator is attached to a steering wheel column. The steering wheel actuator includes a gear assembly for turning a steering wheel on the steering wheel column, a motor for rotating the gear assembly, and an enclosure. A control system in the enclosure controls the motor to automatically steer the vehicle. The control system may receive global navigation satellite system (GNSS) signals from a GNSS antenna and GNSS receiver located in the enclosure and automatically steer the vehicle based on the GNSS signals. The control system also may receive inertial measurement unit (IMU) signals from an IMU located in the enclosure and automatically steer the vehicle based on the IMU signals. The control system also may receive user input signals from a user interface located on the enclosure and automatically steer the vehicle based on the user input signals.

A steering system includes a steering column for rotation between at least a center position and a range of second positions and defining a central axis. The steering system also includes an actuator assembly in operative communication with the steering column to provide steering assistance, the actuator assembly comprising a pair of plates, each plate including a first helical track and a second helical track. The steering system further includes a spring element arranged with the actuator assembly to bias movement of one of the pair of plates along the central axis to influence the steering column to move to the center position.

A steering system includes a steering column for rotation between at least a center position and a range of second positions and defining a central axis. The steering system also includes an actuator assembly in operative communication with the steering column to provide steering assistance, the actuator assembly comprising a pair of plates, each plate including a first helical track and a second helical track. The steering system further includes a spring element arranged with the actuator assembly to bias movement of one of the pair of plates along the central axis to influence the steering column to move to the center position.

A quick release mechanism for a wheel includes a hub and a clip, which interact with a wheel or roller that may or may not be part of the invention per se. The hub is disposable on a drive shaft such that it will rotate with the drive shaft. An optional hub cap is disposable on the wheel and has an opening that is complimentary to the geometry of the hub to allow engagement thereof such that the hub the hub cap rotate together. The clip is disposable on the hub in a closed or an open position so that the hub cap cannot or can be removed from the hub.

A quick release mechanism for a wheel includes a hub and a clip, which interact with a wheel or roller that may or may not be part of the invention per se. The hub is disposable on a drive shaft such that it will rotate with the drive shaft. An optional hub cap is disposable on the wheel and has an opening that is complimentary to the geometry of the hub to allow engagement thereof such that the hub the hub cap rotate together. The clip is disposable on the hub in a closed or an open position so that the hub cap cannot or can be removed from the hub.