Abstract:
Low carbon carburizing (surface hardening) and higher carbon through hardening steels primarily containing molybdenum, vanadium and nickel and, to a lesser amount, chromium used for rolling contact bearings, gears and other similar applications where high hardness at elevated temperatures is required. The alloy steel includes, in % by weight: 0.05% to 1.25% C; up to 1.25% Cr; 0.40% to 4% Mn; up to 4.0% Mo; up to 2.0% V; 1.0% to 3.0% Ni; 4% to 8% (Mo+V+Ni+Cr); less than 0.20% Si; and balance Fe plus incidental additions and impurities. The method for providing a steel having improved hardness at elevated temperatures includes the steps of: (a) providing an alloy including, in % by weight: less than 1.25% Cr, 0.4% to 4% Mn, up to 4% Mo, up to 2% V, 1 to 3% Ni, 4% to 8% (Mo+V+Ni+Cr), less than 0.2% Si, a C content selected from one of 0.05% to 0.40% C defining a carburizing steel or greater than 0.40% to 1.25% C defining a through hardening steel, and the balance Fe plus incidental additions and impurities; (b) performing a step selected from the group consisting of (i) subjecting the carburizing steel to carburizing and quenching to provide a quenched carburized steel, or (ii) subjecting the high carbon steel to hot working to provide a wrought high carbon steel; (c) preheating the quenched carburized steel or wrought high carbon steel and then austenitizing said steel to provide an austenitized steel; (d)quenching the austenitized steel to provide quenched austenitized steel; and (e) tempering the quenched austenitized steel followed by air cooling.
Abstract translation:主要含有钼,钒和镍的低碳渗碳(表面硬化)和较高碳通过硬化钢,以及较少量的用于滚动接触轴承,齿轮和其它需要高温高硬度的类似应用的铬。 合金钢以重量%计含有0.05%至1.25%C; 高达1.25%Cr; 0.40%〜4%Mn; 高达4.0%的Mo; 高达2.0%V; 1.0%〜3.0%Ni; 4%至8%(Mo + V + Ni + Cr); 小于0.20%的Si; 并平衡Fe加附加添加物和杂质。 提供在高温下具有改善的硬度的钢的方法包括以下步骤:(a)提供一种合金,其以重量%计含有:小于1.25%的Cr,0.4%至4%的Mn,至多4%的Mo,上 至2%V,1%至3%Ni,4%至8%(Mo + V + Ni + Cr),小于0.2%的Si,选自0.05%至0.40%C的C含量,定义渗碳钢或 大于0.40%至1.25%C,限定了贯穿硬化钢,余量为Fe加附加添加物和杂质; (b)进行选自(i)使渗碳钢进行渗碳淬火以提供淬火的渗碳钢的步骤,或(ii)对高碳钢进行热加工以提供锻造的高碳钢; (c)预热淬火的渗碳钢或锻造的高碳钢,然后奥氏体化所述钢以提供奥氏体化钢; (d)淬火奥氏体钢以提供淬火奥氏体化钢; (e)回火淬火后的奥氏体化钢然后进行空气冷却。
Abstract:
An epicyclic gear system (A, B), which is highly compact, yet capable of transferring substantial torque, includes a sun gear (2, 62), a ring gear (4, 64) around the sun gear, and planet gears (6, 8, 66, 68) organized in two rows between the sun and ring gears. In addition, the gear system has a carrier (10, 70) provided with one or two flanges (14, 72, 74) and flexible pins (20, 22, 80, 82) around which the planet gears revolve. The planet gears are mounted on the pins in a double cantilever arrangement to improve the mesh with the sun and ring gears and achieve better load distribution.
Abstract:
A wedge loading mechanism for an eccentric planetary traction drive in which a roller having a flexibly mounted shaft is positioned between two raceways forming a convergent wedge. Rotation of either of the two raceways wedges the roller within the convergent wedge squeezing the roller between the two raceways thereby transmitting rotational motion and torque between the two raceways. The flexibly mounted shaft generates differences between an effective supporting stiffness of the roller and an contact effective stiffness at the points where the roller contacts the two raceways. The difference in the effective stiffness allow the roller to operate efficiently at smaller convergent wedge angles.
Abstract:
A backing ring that serves to back an antifriction bearing on the journal of a rail car axle includes an annular body that seats against a fillet that is located at the end of the journal and also a lip that projects over a larger dust guard diameter that is located on the axle immediately beyond the fillet. In addition, the backing ring includes a stabilizing element which cooperates with the lip and with the dust guard diameter to lessen the tendency of the annular body to work against the fillet and create a fretting wear when the journal undergoes cyclic flexures. The stabilizing element accommodates dust guard diameters of varying size. The stabilizing element may also establish a seal between the lip and the dust guard diameter.
Abstract:
An integrated electric motor and traction drive is disclosed. The device comprises an electric motor and a traction drive. The electric motor provides power at a high angular velocity to a sun roller. The sun roller transfers the power to the traction drive which reduces the power to a lower angular velocity and delivers it via an output shaft.
Abstract:
A method of sharing manufacturing data with a consumer of a product is disclosed. A unique identifying indicia, such as a serial number or bar code is associated with each manufactured product. That identifying indicia is detected by the consumer of the product, through communication with the manufacturer of the product, preferably via the Internet. The manufacturer maintains a record of both the unique identifying indicia and physical properties of the specific product corresponding to the unique identifying indicia. Upon receiving a request from the consumer of the product, the manufacturer communicates the desired physical properties of the specific product associated with the unique identifying indicia to the consumer. It is therefore possible for the consumer to avoid a step of precision physical measurement of the product, since the actual physical properties have been measured by the manufacturer and recorded previously.
Abstract:
A vehicle wheel hub with a flange by which a wheel is mounted, the hub being supported by a knuckle and rotated through a universal joint, such as a CV joint, the CV joint having an outer joint member or shell with a cylindrical end having an end face. Axially spaced inboard and outboard tapered roller bearing members are positioned between the hub and the knuckle. The inboard bearing member has a cone with a raceway and a back face but no thrust rib. The shell cylindrical end face abuts the inboard cone back face and is adapted to engage the back faces of tapered rollers of the inboard roller bearing member to serve as a thrust rib for the inboard bearing member.
Abstract:
A tapered roller bearing that is well-suited for supporting a pinion in an automotive differential has a cone and a cup provided with opposed raceways that are crowned. The cone also has a thrust rib provided with a rib face at the large end of its raceway. In addition, the bearing has tapered rollers, each having a tapered side face that is crowned and a large end that is spherical. The rollers contact the raceways along their crowned side faces and the rib face along their spherical end faces. The roller length to large end diameter is less than 1.5. The crowning on the raceway, together with the crowning of the roller side face provide total end relief ranging between 700 nullin. and 1500 nullin. per inch. The centers of contact between the side faces and raceways are offset toward the rib face. The height of the rib face amounts to 30%-45% of the diameter of the large ends of the rollers. The radius of the spherical large end face for a roller exceeds 90% of the roller apex length. The runout in the large end faces is less than 50 nullin. and the center of contact between the end face of each roller and the rib face is between 0.02 and 0.04 in. All of this contributes to low torque demands by the bearing itself and low wear.
Abstract:
An antifriction bearing (A) that enables a shaft (4) to rotate with minimum friction in a housing (2) includes a generally cylindrical outer race (46) located in an opening (12) in the housing, an inner race (48) located around the shaft, and rolling elements (50) arranged in rows between raceways on the outer and inner races. The outer race has a cylindrical exterior surface (56), whereas the opening in which the bearing is located has a flat wall (14, 16). A stabilizing block (C) may be attached to the outer race against its cylindrical surface, and this block lies along the flat surface of the housing opening to prevent the outer race from turning in the housing opening. A sensor module (B) is located within the environs of the bearing, and it contains a plurality of sensors (110, 112, 114) which produce signals that reflect conditions under which the bearing operates. Among the conditions monitored are speed, temperature and vibrations.
Abstract:
A stainless steel bearing component containing in excess of 11% chromium and between 0.05% and 0.50% carbon is case-hardened by introducing carbon or nitrogen into the surface of the race using a plasma process. The component is heated in a chamber from which air is evacuated. There it is bombarded with hydrogen ions to clean its surface. Next, while the component remains at an elevated temperature, a gas containing carbon or nitrogen or both is introduced into the chamber where it exists at a relatively low pressure on the order of 2-9 torr. A plasma is produced intermittently, and it causes carbon or nitrogen or both to diffuse intio the surface of the component and create a case containing a greater proportion of carbon or nitrogen than the underlying core. Thereafter, the component is cooled and with most stainless steels this may be acheived by quenching in oil. Where the case is enriched in carbon, the component is thereafter reheated to a temperature where its core exists as single phase austenite and held at that temperature to effect a soak. An oil quench follows and it converts much of the austenite to martensite. The quench in turn may be followed by cryogenic cooling to convert retained sustenite into martensite. After assuming ambient temperature, the component is again heated to temper the hardened case.