Abstract: A self-balancing vehicle frame is mounted with two angle sensors and two wheels that are electrically and respectively coupled to the angle sensors, and includes a front frame assembly that includes two front frame units and a first connecting unit. The front frame units cooperatively define a connecting space therebetween. Each of the front frame units is mounted with a respective one of the wheels and a respective one of the angle sensors, and is operable to tilt the corresponding one of the angle sensors. The first connecting unit is located in the connecting space, and interconnects the front frame units such that the front frame units are rotatable relative to each other.

Abstract: A self-balancing vehicle frame includes two side frame units and a bearing unit interconnecting the side frame units such that each of the side frame units can tilt independently against the other of the side frame units. Each of side frames is mounted with a wheel, a driver, and a self-balancing electric system integrated with a pedal and handle. Through operation of hands and feet, each of the side frame units is operable to tilt the corresponding components forwardly and rearwardly. As such, a user can operate the vehicle using hands and/or feet to control travelling and turning of the vehicle.

Abstract: A processing machine includes a slide seat, a spindle head seat and a workpiece exchanger. A threaded guide rod is journalled on a machine bed, and is rotatable to move the slide seat on the machine bed along a first direction. The spindle head seat is mounted movably on the slide seat, and is movable reciprocally along a second direction perpendicular to the first direction. The workpiece exchanger includes an exchanger body mounted rotatably on the machine bed at a position adjacent to the spindle head seat, and two worktables mounted respectively and movably on opposite side surfaces of the exchanger body. The workpiece body is rotatable about a third direction, which is perpendicular to the second direction, by 180 degrees to align a selected one of the worktables with the spindle head seat.

Abstract: A servo system includes a tubular drive shaft journalled in a housing. A screw is engaged threadably with a nut which is fixed in the drive shaft. A driven body is secured to an end of the screw so that the screw can effect a rectilinear movement with the driven body but cannot rotate. A motor can rotate the drive shaft in an infinite angle through a gearing so that the drive shaft can move in a first direction continuously. Then, an end of a fork is rotated by an abuttment element which is sleeved on the drive shaft. At this time, the other end of the fork activates a hydromechanical servo, and hence a hydraulic driving unit, to move the drive body in a second direction which is equal and a opposite the first direction. After which, the drive shaft is moved back to the original position by the driven body. The driven body is therefore moved a predetermined distance.