The ball reflow component includes a ball cage, a first end cover, and a second end cover. The ball cage includes a long groove, a first recessed portions, a second recessed portions, a first side portion, and a second side portion corresponding to the first side portion. The first recessed portions and the second recessed portions are arranged on the first side portion and the second side portion, respectively. The first end cover is assembled on the first side portion. The first end cover includes a first curve and first protruding portions, and the first protruding portions are correspondingly arranged in the first recessed portions. The second end cover is assembled on the second side portion. The second end cover includes a second curve and second protruding portions, and the second protruding portions are correspondingly arranged in the second recessed portions.

A grooved linear bearing having a plurality of relatively rigid, laterally extending side plates and multiple sets of one or more circumferentially grooved bearings mounted laterally along and between adjacent side plates. One or more rod or tube corners or edges can penetrate mating peripherally grooved bearings, providing rotational stability for the rod mounted within the bearing; and inclusion of laterally spaced sets of such groove bearings (i.e., laterally along the linear bearing axis) can provide transverse (side-to-side) stability of the rod when slidably mounted within the linear bearing.

The ball reflow component includes a ball cage, a first end cover, and a second end cover. The ball cage includes a long groove, a first recessed portions, a second recessed portions, a first side portion, and a second side portion corresponding to the first side portion. The first recessed portions and the second recessed portions are arranged on the first side portion and the second side portion, respectively. The first end cover is assembled on the first side portion. The first end cover includes a first curve and first protruding portions, and the first protruding portions are correspondingly arranged in the first recessed portions. The second end cover is assembled on the second side portion. The second end cover includes a second curve and second protruding portions, and the second protruding portions are correspondingly arranged in the second recessed portions.

The present invention relates to a linear motor, the rotor is well sealed through a sealing module when running on the stator slide rail, so that small external dust that affects the operating accuracy and stability performance of linear motor is not easy to enter the sealed space; the lubrication module communicates with the sealed space, so that the linear motor can be effectively lubricated during operation, further improving the operational accuracy and stability of the linear motor; the ball return end cap and the first chute together form a circulation loop for ball movement, the ball retaining plate fits with rotor through locating surface to improve the installation accuracy, meanwhile contact surfaces that limit balls are provided on both sides of the locating surface, so that a ball retaining plate can be used for two rows of circulation loops.

The present invention relates to a ball return end cap and a linear motor thereof, including an end cap body having a ball-returning channel, the ball-returning channel has a first return port and a second return port, the end cap body is provided with an oil passage connecting to the outside that communicates with the ball-returning channel. The end cap body has a ball-returning channel through which the ball can enter/exit from the first return port and exit/enter from the second return port. In addition, the oil passage is disposed on the end cap body and communicates with the ball-returning channel, so that lubricating oil can directly lubricate the interior of the ball circulating slide rail on the rotor, providing good lubrication for the balls; lubricating oil can also provide good lubrication for the ball-returning channel, ensuring smoother returning of the ball return end cap.