| 摘要 |
<p>1493544 Lubricating gearing DUFF-NORTON CO Inc 6 Feb 1976 [8 Sept 1975] 04728/76 Heading F2Q [Also in Division B8] A mechanical actuator 10 comprises a housing 12, shown formed as a shell 12<SP>1</SP> with a shell cap 12<SP>11</SP> threaded thereinto, with a chamber 60 for lubricating oil 62. A drive shaft 14 extends into the chamber 60 through an aperture (18), Fig. 2 (not shown); in the housing 12 and has a gear 14<SP>1</SP> engaging a gear 32 forming part of a gearnut assembly 22 with a ball-nut component 26 having ball returns 28 mounted exteriorly thereon. A tubular shield 48 is mounted on the ball-nut component 26 in covering relation to the ball returns 28 and is sealed by sealant 50 at one end to the gear 32 and at the other end to a bearing retainer 42 for a first bearing 24. A screw 52 in driven engagement with the ball-nut components 26. An oil-proof seal for the chamber 60 is provided by the sealant 50, a seal 58 at the first bearing 24, a seal 56 at a second bearing 24 adjacent the gear 32, and a seal (20) at the aperture (18) for the drive shaft 14. As shown passages 66, 68, 70 extend through the housing 12 to the chamber 60 and are fitted with interchangeable soiled plugs 72 or a breather plug 74, the location of the breather plug 74 being selected according to the disposition of the actuator 10.</p> |
