摘要:
A method of manufacturing a gear (20") includes providing a rim gear (14"), a hub (10") and a core (12"), wherein the core (12") is annular and has a core forging temperature below a hot hardness temperature of the rim gear (14") and the hub (10"). The rim gear (14") and the hub (10") are rotated about an axis relative to the core (12"). During the relative rotation, the rim gear (14") and the hub (10") are in contact with the core (12") to generate friction heat to raise an interface temperature of the core (12") to the core forging temperature. The hub (10") is driven into the core (12") to upset a first portion of the core (12") into an outer annular groove defined in a first faying surface of the hub (10"). The rim gear (14") is driven over the core (12") to upset a second portion of the core (12") into an inner annular groove defined in a second faying surface of the rim gear (14").
摘要:
A method for manufacturing a gear includes forming a bi- material billet from a steel cylinder (13) having a cylindrical wall, a first end closed with a first steel cap, and an open second end distal to the first end. The method includes disposing a core material (30) other than steel into the steel cylinder (13), welding a second steel cap onto the steel cylinder to form the bi-material billet, and heating the cylindrical wall. The method includes a first forging blow on the heated billet or on a disk-shaped rough forging forged from the heated billet with a first closed blocker die to produce a partial toothed preform, and a second forging blow on the preform with a second closed blocker die to produce a netshape gear. The first closed blocker die has a die cavity including gear tooth forms, and the partial toothed preform includes a plurality of spaced gear teeth.
摘要:
In a gear mechanism that includes a gear in which a tooth trace is twisted at a predetermined angle with respect to an axial direction, a curvature radius along a line of contact at a meshing position where a line of contact does not intersect a pitch circle is formed larger than a curvature radius along a line of contact at a meshing position where a line of contact intersects a pitch circle, on a plane of action of the gear.
摘要:
A die apparatus and method for performing a flashless forging operation to manufacture the toothed portion of a steering rack. The die apparatus comprising first and second die members and at least one punch member, each having a forming surface shaped substantially as the obverse of a portion of said toothed portion, and at least a portion of the forming surface of said first die member being shaped substantially as the obverse of the teeth of said rack. Said first and second die members being moveable towards each other to a closed position thereby partially forging said toothed portion from a blank placed in said die apparatus and forming a substantially closed cavity defined by said forming surfaces, said punch member being adapted to move into said cavity, once said die members are in said closed position, thereby completing said forging operation.
摘要:
A drive assembly (83) couples a prime mover (13) and a generator (11), to one another. The assembly (83) includes a transmission member (19) having a plurality of inwardly projecting fingers (21) and a coupling (10) having a plurality of outwardly directed projections (45) interdigitated with the fingers (21). The coupling (10) is shaped to have an interior cavity (37). A shock-absorbing resilient device (53) is lodged in each notch (49) formed by a transmission member finger (21) and the coupling projections (45) on either side of such finger (21). Each resilient device (53) includes at least one spur (103) projecting from it to prevent substantial rotation of the device (53) in its pocket (101). In a more specific embodiment, alternating pairs of resilient devices (53) are made, respectively, of natural rubber for good shock absorption and Buna N for resisting the harmful effects of oil.
摘要:
Zur Minimierung der zwischen den Gesperreteilen (30, 31), d. h. zwischen der Sperrklinke (5) und der Drehfalle (2) eines Kraftfahrzeugschlosses (1) auftretenden Gleitreibung ist es vorteilhaft, wenn beim Fertigungsvorgang die unterschiedlichen Rastflächen (12 und 13) der beiden Gesperreteile (30, 31) einmal mit einer Stanzkontur (14) und zum Anderen mit einer schräge Bearbeitungsrillen (34, 35) aufweisenden Kontur (11) versehen sind. Bearbeitungsrillen (34, 35) werden nach Stanzen der Sperrklinke (5) insbesondere auf deren Rastfläche (13) aufgebracht, wobei durch beispielsweise das Herausfräsen der Bearbeitungsrillen (34, 35) bestimmte Formen von schrägen Riefen (18, 19) bzw. Bearbeitungsrillen (34, 35) entstehen. Die schrägen Bearbeitungsrillen (34, 35) sind unter einem bestimmten Winkel stehend erzeugt und gewährleisten, dass die geraden Riefen (17) auf der Drehfalle (2) nur wenige Überdeckungspunkte mit den schrägen Bearbeitungsrillen (34, 35) haben, wenn beide Gesperreteile (30, 31) miteinander in Berührung kommen.
摘要:
Mating bevel gears generally include a pinion gear having a body that rotates about an axis and a side gear having a body that rotates about an axis that intersects the axis of the pinion gear. Pinion gear teeth of the pinion gear have a side that defines a curvature with an involute section through which a pitch line extends and a parabolic shape between the pinion gear teeth. Side gear teeth of the side gear have a side that defines a curvature with an involute section through which a pitch line extends and a parabolic shape between the side gear teeth. The curvatures on the pinion and the side gear teeth cooperatively define a controlled relative radius of curvature section except where the involute sections are located. The controlled relative radius of curvature section defines a sum of values of radius of curvature at a point of contact between the curvatures of the pinion gear teeth and the side gear teeth. The sum has a constant or decreasing value.