ROCKING TYPE FLUID-TIGHT DRIVE UNIT

PURPOSE:To simplify the sealing structure and as well to aim at ensuring the sealing of a rocking type fluid-tight drive unit in which power transmission is carried out through a bulkhead fluid-tightly partitioning between a drive shaft side and a driven shaft side, by transmitting drive power from a drive shaft to a driven shaft after the rotary motion of the drive shaft is converted into procession. CONSTITUTION:In case that power transmission is carried out between a drive shaft 1 and a driven shaft 2 which are laid on the same axis O-O and which are respectively located in chambers A, B that are fluid-tightly partitioned by a bulkhead 3, a spherical member 7 is journalled to the bulkhead 3 by means of a spherical member holding part 5 fitted into the inner peripheral surface of a piercing opening 4 in the bulkhead 3, and is integrally incorporated with a rocking shaft 6. Discs 8, 9 are threadedly fitted onto both ends of the rocking shaft 6, respectively, and are sealed between each of them and the bulkhead 3 with cylindrical bellows 14, 15, respectively. Meanwhile, a cylindrical socket 19 is attached to one end of drive shaft through a spherical surface bearing 20, and is secured to the disc 8. Further, a shifter 31 is slidably attached to one end of the driven shaft 2, and a cone ring 37 attached to the shifter 31 through a supporting shaft 32 is made into contact with the conical surface 29 of the disc 9.