| 摘要 |
A coupling device consists of a coupling housing (2) and a coupling nipple (2), the coupling housing (2) comprising a coupling sleeve (10) into which the coupling nipple (2) is introducable to a sealing position. The wall of the coupling sleeve (10) is formed with through, radial openings (12) elongated in the axial direction of the sleeve (10) and in which locking balls (14) are journaled. The locking balls (14) are radially and axially movable in the elongated openings (12) between a locking position and a releasing position for the coupling nipple (2). In the locking position the locking balls (14) are positioned at the front end of its opening with regard to the direction of introduction of the coupling nipple (2), the balls (14) extending inside the inner surface of the wall of the coupling sleeve (10) and engaging a complementary recess (36) in the coupling nipple (2) so as to lock the coupling nipple (2) in the sealing position when the coupling nipple (2) is in its sealing position in the coupling sleeve (10). In the releasing position the balls (14) are positioned at the inner end of its opening (12) with regard to the direction of introduction of the coupling nipple (2) and radially outside the locking position in which the balls (14) engage the recess of the coupling nipple (2) so as to allow that the coupling nipple (2) is introduced into or withdrawn from the coupling sleeve (10). The coupling housing (2) comprises guiding surfaces (16) so as to guide the balls (14) to the locking position inside the inner surface of the wall of the coupling sleeve (10) when the balls (14) are positioned in their releasing position. A guiding sleeve (30) is provided at the outer surface of the wall of the coupling sleeve (10) and is axially displaceable between a position in which the locking balls (14) are positioned in their locking positions and a position in which the locking balls (14) are positioned in their releasing positions. The locking balls (14) are spring-loaded in the direction of their locking positions, and the guiding sleeve (30) is spring-loaded in the direction of the positions in which the balls (14) are in their locking positions. In order to improve the function of the locking balls (14) they are connected with a common carrier element (20) for common guiding of the displacement of the locking balls (14) in the axial direction between the locking position and the releasing position. <IMAGE> |
