An apparatus comprising: a chassis comprising a front end and a rear end, wherein the rear end of the chassis serves as a fork assembly, wherein the fork assembly comprises a first end and a second end, and wherein the fork assembly further comprises: a first plate comprising a first side wall and a second side wall, wherein each of the first side wall and the second side wall extends from the first end through the second end of the fork assembly; a first set of bushings (112A-C) and a second set of bushings (114A-C), wherein each bushing from the first set of bushings (112A-C) and the second set of bushings (114A-C) comprises a circular end and a flange end, wherein the flange end of each bushing from the first set of bushings (112A-C) and the second set of bushings (114A-C) comprises a plurality of holes (118A-N), and wherein the first set of bushings (112A-C) and the second set of bushings (114A-C) are mounted adjacent to the first side wall and the second side wall respectively on the first plate of the fork assembly by a plurality of screws that are fitted into the plurality of holes (118A-N) of the flange end; a first set of guide rods (120A-C) and a second set of guide rods (122A-C), wherein each guide rod from the first set of guide rods (120A-C) and the second set of guide rods (122A-C) is configured to slide through the circular end and a corresponding linear bearing comprised in a corresponding bushing from the first set of bushings (112A-C) and the second set of bushings (114A-C); a bearing retainer mounted on the first plate; a ball screw and bevel gear assembly coupled to the bearing retainer using one or more bearings, wherein the ball screw and bevel gear assembly comprises a ball screw and a bevel gear arrangement; a ball screw nut mounted on the ball screw and bevel gear assembly, wherein a first end of the ball screw nut comprises a step to form a plurality of threads, and a second end of the ball screw nut comprises a set of holes (136A-N); a hinge clamp mounted on the second end of the ball screw nut via the set of holes (136A-N) using a plurality of pins; a fork motor fitted in the first plate, wherein the fork motor is operatively coupled to the ball screw and bevel gear assembly; and a second plate mounted on the first plate, wherein the second plate comprises a plurality of hinge mounting holes (146A-N) and a plurality of guide rod mounting holes (148A-N), wherein the second plate is fixed to the hinge clamp, the first set of guide rods (120A-C) and the second set of guide rods (122A-C) using a plurality of screw mechanisms through the plurality of hinge mounting holes (146A-N) and the plurality of guide rod mounting holes (148A-N) respectively. a first plate comprising a first side wall and a second side wall, wherein each of the first side wall and the second side wall extends from the first end through the second end of the fork assembly; a first set of bushings (112A-C) and a second set of bushings (114A-C), wherein each bushing from the first set of bushings (112A-C) and the second set of bushings (114A-C) comprises a circular end and a flange end, wherein the flange end of each bushing from the first set of bushings (112A-C) and the second set of bushings (114A-C) comprises a plurality of holes (118A-N), and wherein the first set of bushings (112A-C) and the second set of bushings (114A-C) are mounted adjacent to the first side wall and the second side wall respectively on the first plate of the fork assembly by a plurality of screws that are fitted into the plurality of holes (118A-N) of the flange end; a first set of guide rods (120A-C) and a second set of guide rods (122A-C), wherein each guide rod from the first set of guide rods (120A-C) and the second set of guide rods (122A-C) is configured to slide through the circular end and a corresponding linear bearing comprised in a corresponding bushing from the first set of bushings (112A-C) and the second set of bushings (114A-C); a bearing retainer mounted on the first plate; a ball screw and bevel gear assembly coupled to the bearing retainer using one or more bearings, wherein the ball screw and bevel gear assembly comprises a ball screw and a bevel gear arrangement; a ball screw nut mounted on the ball screw and bevel gear assembly, wherein a first end of the ball screw nut comprises a step to form a plurality of threads, and a second end of the ball screw nut comprises a set of holes (136A-N); a hinge clamp mounted on the second end of the ball screw nut via the set of holes (136A-N) using a plurality of pins; a fork motor fitted in the first plate, wherein the fork motor is operatively coupled to the ball screw and bevel gear assembly; and a second plate mounted on the first plate, wherein the second plate comprises a plurality of hinge mounting holes (146A-N) and a plurality of guide rod mounting holes (148A-N), wherein the second plate is fixed to the hinge clamp, the first set of guide rods (120A-C) and the second set of guide rods (122A-C) using a plurality of screw mechanisms through the plurality of hinge mounting holes (146A-N) and the plurality of guide rod mounting holes (148A-N) respectively.