摘要:
A gear of a gear device includes a plurality of teeth having tooth surfaces. The tooth surfaces are shaped such that contact length ratios of three or more of the teeth are outside a predetermined range centered on an average value of the contact length ratios of all of the teeth, where the contact length ratio is obtained by dividing a contact length of a tooth contact face by a diagonal length of a plane of action.
摘要:
The invention relates to a bevel gear wheel of a bevel gear mechanism, the teeth of which bevel gear wheel have in each case a load flank and a rear flank, wherein the rear flanks have an engagement region for rear flanks of the meshing gear wheel, wherein the outer region, which surrounds the original maximum possible usable engagement region which normally comes into engagement, of the rear flank and an outer edge region of the original engagement region are reduced in terms of the face height thereof such that said reduced regions always remain free from contact and only the remaining, inner, raised region which is reduced in size comes into contact.
摘要:
A transmission gear has a tooth surface formed of a free-form surface instead of an involute surface and a root area formed of a free-form surface instead of a trochoid surface. With such a transmission gear, the fatigue strength against contact pressure can be increased by reducing the Hertzian stress in the area around the meshing point of the tooth surface. The tooth surface is formed of a free-form surface in which the smallest radius of curvature in an area around a mating pitch point is maximized, and the fatigue strength against bending can be increased by reducing the bending stress at a tooth root portion of the bottom land. In addition, the gear noise can be reduced. The bottom land is formed of a free-form surface in which the smallest radius of curvature in an area around a tooth root is maximized.
摘要:
A driving device includes a motor, and first and second gears having gear teeth engaged with each other. At least one of the first gear and the second gear includes a crowning portion formed at a tooth surface of each of the gear teeth such that the center of the tooth surface is more convex than both ends of the tooth surface in a tooth width direction. A height of the crowning portion is determined to effectively compensate for misalignment between the first gear and the second gear.
摘要:
In a gear (G1) according to the present invention, which is provided with a plurality of teeth (1) to be mated with teeth of a mating gear to thereby transmit a rotational motion, a predetermined region (A) in at least one tooth flank (7) of each tooth (1) is formed in a configuration such that, from at least one place in a tooth width direction on a crossing (8) of the tooth flank (7) and a tooth tip surface (3), the mating with the teeth of the mating gear is started with the point contact or the line contact shorter than the total tooth width, and thereafter, is gradually shifted to the line contact so that the length of contact line (10) thereof is sequentially increased as the line contact moves from a tooth tip surface (3) side toward a tooth root side.
摘要:
A driving device includes a motor, and first and second gears having gear teeth engaged with each other. At least one of the first gear and the second gear includes a crowning portion formed at a tooth surface of each of the gear teeth such that the center of the tooth surface is more convex than both ends of the tooth surface in a tooth width direction. A height of the crowning portion is determined to effectively compensate for misalignment between the first gear and the second gear.
摘要:
There are provided a resin double helical gear capable of reducing operation noises and vibrations of an image forming system, such as an ink jet printer, which is arranged in the vicinity of an operator, and a gear train using the same and having a smaller number of parts. The gear train 2 for ink jet printer 1 includes a first resin double helical gear 5 which is mounted on an output shaft 4 of a motor 3 so as to be rotatable therewith, and a second resin double helical gear 6 which is mounted on a paper feeding roller shaft 7 so as to be rotatable therewith and which meshes with the first resin double helical gear 5.
摘要:
There are provided a resin double helical gear capable of reducing operation noises and vibrations of an image forming system, such as an ink jet printer, which is arranged in the vicinity of an operator, and a gear train using the same and having a smaller number of parts. The gear train 2 for ink jet printer 1 includes a first resin double helical gear 5 which is mounted on an output shaft 4 of a motor 3 so as to be rotatable therewith, and a second resin double helical gear 6 which is mounted on a paper feeding roller shaft 7 so as to be rotatable therewith and which meshes with the first resin double helical gear 5.
摘要:
A gear train for an ink jet printer includes an output gear of a motor, a first idle gear meshing with the output gear, a second idle gear rotatable with the first idle gear, and a driven gear which is mounted on a roller shaft so as to be rotatable therewith and which meshes with the second idle gear. A resin double helical gear is used as each of the output gear and the first idle gear, and a spur gear is used as each of the second idle gear and the driven gear. The resin double helical gear may have a meshing relief portion formed by cutting a chevron-shaped top portion in a central portion in face width directions, which is arranged in a butt portion between a first die and a second die, from a tooth crest to a portion near a bottom lane so as to decrease a tooth thickness.
摘要:
A power transmission device is provided with: a first gear having a plurality of teeth that share an identical tooth profile; an intermediate gear that is engaged with the first gear; and a second gear that is engaged with the intermediate gear, and has a plurality of teeth that share an identical tooth profile, wherein the first gear and the second gear have an identical number of teeth, an identical reference diameter, and an identical reference pitch; and the tooth profile of the first gear is different from that of the second gear