An autonomous mobile robot for tugging a carrier with an automated carrier tugger mounted thereon, wherein the automated carrier tugger comprising: a rotary joint unit, comprising: a vertical fixed shaft, fixed at two ends, wherein one end is mounted to a base plate, and another end is fixed to a counterweight housing to house a swivel arm; and a plurality of integral pipes (212A-B), integrated with a pipe mounting plate at one end, wherein the plurality of integral pipes (212A-B) are designed to be parallel to each other, wherein the pipe mounting plate is perpendicular to a ground before tightening a plurality of screws for a required torque; a swivel adaptor unit, comprising: the pipe mounting plate, which is mounted onto the plurality of integral pipes (212A-B), wherein the pipe mounting plate and a plurality of split connecting joint plates (308A-B) are joined to hold a female spherical joint; and a male spherical joint, integrated with a swivel adaptor plate, wherein the swivel adaptor plate is mounted to revolve with the male spherical joint to limit an amount of revolution and the swivel adaptor plate touches the plurality of split connecting joint plates (308A-B); and a tugging unit for clamping a horizontal bar, comprising: a single rear clamp, mounted onto a vertical axis slide, wherein the vertical axis slide is mounted to the swivel adaptor plate; and a plurality of front clamps (520A-B) with a plurality of flanges (524A-B), mounted onto a plurality of horizontal axis slides (512A-B) to move in a forward direction or a backward direction. a rotary joint unit, comprising: a vertical fixed shaft, fixed at two ends, wherein one end is mounted to a base plate, and another end is fixed to a counterweight housing to house a swivel arm; and a plurality of integral pipes (212A-B), integrated with a pipe mounting plate at one end, wherein the plurality of integral pipes (212A-B) are designed to be parallel to each other, wherein the pipe mounting plate is perpendicular to a ground before tightening a plurality of screws for a required torque; a vertical fixed shaft, fixed at two ends, wherein one end is mounted to a base plate, and another end is fixed to a counterweight housing to house a swivel arm; and a plurality of integral pipes (212A-B), integrated with a pipe mounting plate at one end, wherein the plurality of integral pipes (212A-B) are designed to be parallel to each other, wherein the pipe mounting plate is perpendicular to a ground before tightening a plurality of screws for a required torque; a swivel adaptor unit, comprising: the pipe mounting plate, which is mounted onto the plurality of integral pipes (212A-B), wherein the pipe mounting plate and a plurality of split connecting joint plates (308A-B) are joined to hold a female spherical joint; and a male spherical joint, integrated with a swivel adaptor plate, wherein the swivel adaptor plate is mounted to revolve with the male spherical joint to limit an amount of revolution and the swivel adaptor plate touches the plurality of split connecting joint plates (308A-B); and the pipe mounting plate, which is mounted onto the plurality of integral pipes (212A-B), wherein the pipe mounting plate and a plurality of split connecting joint plates (308A-B) are joined to hold a female spherical joint; and a male spherical joint, integrated with a swivel adaptor plate, wherein the swivel adaptor plate is mounted to revolve with the male spherical joint to limit an amount of revolution and the swivel adaptor plate touches the plurality of split connecting joint plates (308A-B); and a tugging unit for clamping a horizontal bar, comprising: a single rear clamp, mounted onto a vertical axis slide, wherein the vertical axis slide is mounted to the swivel adaptor plate; and a plurality of front clamps (520A-B) with a plurality of flanges (524A-B), mounted onto a plurality of horizontal axis slides (512A-B) to move in a forward direction or a backward direction. a single rear clamp, mounted onto a vertical axis slide, wherein the vertical axis slide is mounted to the swivel adaptor plate; and a plurality of front clamps (520A-B) with a plurality of flanges (524A-B), mounted onto a plurality of horizontal axis slides (512A-B) to move in a forward direction or a backward direction.