Abstract: A deceleration mechanism comprises a driving wheel, a driven wheel of a diameter exceeding that of the driving wheel, a transmission member coiling around the driving wheel and the driven wheel; and a tension assembly fixed to the driven wheel. The transmission member coils around the driving wheel, criss-crosses, and coils around the driven wheel. The tension assembly is arranged between the transmission member and the driven wheel and elastically resists the transmission member and the driven wheel.

Abstract: A deceleration mechanism includes a transmission assembly and a driving device. The transmission assembly includes a driving member, a first driven assembly, a second driven assembly, a first transmission member, and a second transmission member. The first transmission member coils around the driving member and the first driven assembly. The second transmission member coils around the first driven assembly and the second driven assembly. The driving device rotates the driving member, the driving member rotates the first driven assembly, and the first driven assembly rotates the second driven assembly.

Abstract: A parallel robot includes a base, a movable platform, a first kinematic chain and a second kinematic chain. The first and the second kinematic chains are connected to the fixed platform and the movable platform respectively, and move on the same plane. Each of the first and second kinematic chains includes a linear driving mechanism mounted on the base and a parallel four-bar linkage driven by the linear driving mechanism and hinged on the movable platform.

Abstract: A parallel robot includes a base, a movable platform, a plurality of control arms, a rotation arm, a plurality of first actuators, and a second actuator. The control arms rotatably interconnect to the base and the movable platform, respectively. Opposite ends of the rotation arm are universally rotatably connected to the base and the movable platform, respectively. The first actuators move the control arms, respectively. The second actuator rotates the rotation arm around a central axis. Each control arm comprises a first transmission member and a transmission cable. The first transmission member comprises a fan-shaped transmission portion. Each first actuator comprises a transmission shaft to engage the first transmission member of the control arm. The transmission cable coils around the transmission shaft for at least one winding, then criss-crosses, and winds on the fan-shaped transmission portion.

Abstract: A deceleration mechanism comprises a base, a transmission device rotatably connected to the base, and a driving device fixed to the base. The transmission device includes a driving assembly having a driving wheel and a driven assembly having a driven wheel. Diameter of the driven wheel is greater than that of the driving wheel. The driving device provides power to rotate the driving wheel. The transmission device further includes a transmission member wound on the driving wheel and the driven wheel. The transmission member winds on the driving wheel at least one winding, then criss-crosses and winds on the driven wheel.

Abstract: A parallel robot includes a fixed platform, a movable platform, a plurality of control arms, a rotation arm, a plurality of first actuators, and a second actuator. The control arms are rotatably connected to the fixed platform and the movable platform, respectively. Opposite ends of the rotation arm are universally rotatably connected to the fixed platform and the movable platform, respectively. The first actuators are to respectively move the control arms. The second actuator is to drive the rotation arm to rotate around the center axis of the rotation arm. Each control arm includes a first transmission unit including a transmission member. Each first actuator includes a transmission gear to engage the transmission member of the control arm.

Abstract: An exemplary translational branch joint for a parallel robot includes a swing arm connected to a four-bar linkage. The four-bar linkage includes two parallel connecting bars, a first link member, a second link member, and joint members. The first link member and the second link member connect the connecting bars. Each joint member comprises a first joint portion and a second joint portion extending from the first joint portion. The first joint portion has a first axis, and the second joint portion has a second axis substantially perpendicular to the first axis. The first joint portions of the joint members are rotatably connected to ends of the first link member and the second link member, and the second joint portions of the joint members are rotatably connected to ends of the connecting bars.

Abstract: A parallel robot includes a base plate, two first actuators located on the base plate, a mobile platform, and two kinematic chains respectively interconnecting the base plate and the mobile platform. Each kinematic chain includes a driving bar assembly and a driven bar assembly. The driving bar assembly is connected to one of two first actuators. The driving bar includes two substantially parallel first transmission bars. Each of the first transmission bars includes a rotating portion rotatably connected to the base plate. The driven bar assembly interconnects the driving bar assembly and the mobile platform. Each of the two first actuators rotates two rotating portions of the two first transmission bars in the same direction simultaneously.

Abstract: A ball joint includes a ball head and a ball socket. The ball head has a spherical head and a rotatable post extending from the spherical head. The ball socket defines a receiving cavity for rotatably receiving the spherical head. The ball socket forms a plurality of annular resisting surfaces on an inner surface defining the receiving cavity. Each annular resisting surface is tangent with an outer surface of the spherical head.