摘要:
A method is provided for remanufacturing a transmission assembly including an output shaft having an input end positioned adjacent an input sun gear. The method includes machining a pocket into the input end of the output shaft. A first roller needle bearing is positioned inside the pocket. The input sun gear is then replaced with a modified sun gear having a protruding center support hub configured to extend into the pocket and cooperate with the first roller needle bearing, thereby supporting the output shaft to prevent tilting of the output shaft to reduce wear.
摘要:
A rigid internal gear 2 of the wave gear device is composed by integrating a tooth-forming ring 12 formed with internal teeth, and a main gear ring 11 into a single body. The tooth-forming ring 12 is manufactured from a ferrous or copper material that has superior strength and abrasion resistance, while the main gear ring 11 is manufactured from a lightweight material, such as an aluminum alloy. The outer circumferential surface of the tooth-forming ring 12 is aluminized to form a dispersed aluminum coating 15, before the tooth-forming ring 12 is cast within the main gear ring 11 so as to integrate the main gear ring 11 and the tooth-forming ring 12. Both parts are reliably integrated so that a large amount of torque can be transmitted, whereby realizing a rigid internal gear that is lighter than conventional models.
摘要:
A method for producing intermeshing gears having improved acoustic and vibration properties characterized by: examining the transmission errors due to mesh stiffness variations, performing Gear Tooth Topological (GTT) to compensate for such errors, and isotropic processing of the face surfaces of the gear teeth to produce an ultra-smooth surface finish. In other embodiments, the method includes the additional steps of determining the transmission errors due to isotropic processing, summing these transmission errors with those associated with mesh stiffness variations and performing GTT modifications to compensate for the combined errors. Other GTT modifications to compensate for transmission errors caused by machining, loading, thermal effects and/or load sharing may be combined to optimize the gear for both noise and structural efficiency. The teachings of the present invention effects noise reduction by as much as 13 to 15 dB tonal.
摘要:
A hypoid gear tooth surface design method, wherein normal lines and helical angles of two tooth surfaces are properly selected so as to position action limit curves (L3Acc) on the outer of the areas (R2t to R2h) where the tooth surfaces are formed, whereby undercut to a gear small end side can be prevented and, by setting the involute helicoids of two tooth surfaces on a pinion side to an equal lead, a pinion top land and a gear top land (z2hnull0) can be made generally equal to each other in tooth lengthwise direction, such that sharpening of the top land can be prevented.
摘要:
An apparatus and method for setting a gap in a hydrodynamic bearing of a disc drive spindle motor is provided. The invention comprises placing an end of the shaft into shaft support apertures in the hub, fitting a thrust bearing counterplate into a recess defined by an annular retaining flange that is proximate the end of the shaft, and deforming the counterplate to form a gap between the end of the shaft and a surface of the counterplate.
摘要:
In order that a worm 1 is rotated, a clearance (a region constituting a clearance portion between bearings and a worm gear) is formed (FIGS. 4(1) to (3)) in an upper surface of a base plate 3. A mold 12 for forming a lower half region of the worm therein is formed (FIG. 4(8)). A material 5 for the worm is deposited (FIG. 4(9)) to a height equal to that of a lower half region plus that of an upper half of the worm. An upper half of the worm is formed (FIGS. 4(10) to (12). Finally, the material 13 in the clearance between the base plate 3 and gear 1 is removed (FIG. 4(13)).
摘要:
The invention is based on a ring gear with teeth (10) and tooth gaps (12), in which the teeth (10) can be brought via tooth flanks (14) into engagement with a corresponding pinion. It is proposed that the tooth flanks (14), after a final engagement point (16) of the pinion, from the tooth head (18) toward the tooth base (20), compared to standard tooth flanks (22), are made to approximate a trochoid (24, 26), described by the pinion and projected into a normal section.
摘要:
A gear part and method is provided for forming a gear part, in which a circular blank-like workpiece is fixed in a flow-forming machine in a radially inner area, the circular blank-like workpiece is rotated, at least one roller is infed and the roller is substantially radially moved inwardly, in which during the radial moving in workplace material flows radially, so that the workplace wall thickness is reduced in this area, in a central area of the workplace a boss is formed and during radial moving in the roller is increasingly axially infed. The method also relates to forming a gear part in which the circular blank edge is thickened by at least one forming roller, the shaping of the circular blank edge taking place through the contour of gripping jaws and/or the forming roller and the cross-section of the circular blank edge in formed in an approximately rectangular manner.
摘要:
A method for forming a helical pinion gear (12) for a rack and pinion steering apparatus (10) comprises the steps of: providing a cylindrical first blank (60) made of a deformable material and having an outer surface (68); providing a cylindrical second blank (100) made of a deformable material and having an outer surface (108); forming a bore (116) extending at least partially through the second blank (100); forming helical teeth (52) on the outer surface (108) of the second blank; and interconnecting the second blank (100) with the first blank (60) to form the helical pinion (12). The helical teeth (52) on the pinion (12) mesh with rack teeth (44) on a rack (16) in a rack and pinion steering apparatus (10).
摘要:
A method is disclosed for the manufacture of gear wheels having two axially adjacent gears (4,6) thereon. A blank is prepared with the two gears crudely formed thereon by compressing and sintering a shaped mass of substantially metal powder. The blank is then mounted for rotation about a first axis, and the gears are roll-formed on the blank by rotating the blank in meshing engagement with respective dies (10,12) mounted for rotation about second and third axes substantially parallel to the first axis.