Patent ID: 9004762
Filing Date: 2015-04-14
Classification: F16C

Abstract:
1. A linear motion module, comprising: a linear rail, two sides of which are configured with at least a rail groove each; a sliding block slidingly disposed on the linear rail and comprising: a sliding block body, wherein the inside of the sliding block body is configured with at least two inner circulation grooves, each of the inner circulation grooves correspond to each rail groove, the inner circulation grooves and the rail groove constitute an inner circulation passage, and each of two sides of the sliding block body is configured with at least a circulation channel that corresponds to the inner circulation passage and penetrates through the sliding block body; at least four circulation elements disposed on the two sides of each of two end surfaces of the sliding block body, respectively, wherein each of the circulation elements includes at least a circulation tube disposed in the corresponding circulation channel, and the opposite two circulation tubes are connected to each other to constitute an outer circulation passage; and two end caps disposed on the two end surfaces of the sliding block body, respectively, wherein each of the end caps is configured with at least two circulation guiding grooves, and each of the circulation guiding grooves is correspondingly connected to the inner circulation passage and the outer circulation passage; and a plurality of balls moving in circles through the inner circulation passage, one of the circulation guiding grooves, the outer circulation passage and the other circulation guiding groove; wherein the sliding block further includes at least two self-lubricating elements, which are disposed in the circulation channels respectively, and the opposite two circulation tubes are connected together through each of the self-lubricating elements.