A universal power transmission joint having a pair of drive pins fixed in parallel by a tie member

A power transmission joint comprising:

• a pair of rotational members arranged with an axial space between opposite ends thereof, each of said pair of rotational members having an axis of rotation and axially extending bearing grooves formed symmetrically with respect to the axis of rotation in said opposite ends, each of said bearing grooves having a pair of radially extending partially cylindrical surfaces for receiving a spherical bearing and allowing said spherical bearing to radially and rotatably move;
• a guide pin disposed between each pair of rotational members and having end portions thereof rotatably and swingably engaged with said opposite ends of said rotational members at the respective axis of rotation of the rotational members;
• a pair of drive pins each disposed between said opposite ends of said pair of rotational members and arranged in parallel and symmetrically disposed with respect to an axis of said guide pin and engaged with the opposite ends of said rotational members so as to transmit torque while allowing said drive pins to slide in radial directions of said rotational members, swing and axially slide relative to said rotational members, respectively in accordance with a rotation of the rotational members, each of said drive pins are axially slidably inserted in spherical bearings held in said bearing grooves;
• and
• a tie member disposed between said opposite ends of said rotational members and rigidly tying said guide pin and said drive pins so as to maintain a fixed relative condition of said guide pin and said drive pins.