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    High carbon steel track bushing
    2.
    发明授权
    High carbon steel track bushing 有权

    公开(公告)号：US11618516B2

    公开(公告)日：2023-04-04

    申请号：US16584158

    申请日：2019-09-26

    申请人： Caterpillar Inc.

    发明人： Chandrasen Rameshlal Rathod ,  Roger Lee Recker ,  Robert Jason Pickerill ,  Scott E. Keele ,  Matthew Thomas Kiser

    IPC分类号： B62D55/15 ,  B62D55/21 ,  F16G15/00 ,  C21D9/00

    摘要： An example bushing has three portions along its radial direction including an inner portion most proximal to a central hole of the bushing, an outer portion most distal from the center hole, and a core portion between the inner portion and the outer portion. The core portion has a hardness that is less than the hardness of the inner portion or the outer portion of the bushing. The bushing may be formed using high carbon steel, which in some cases may be spheroidal cementite crystal structure. A rough bushing may be formed using the high carbon steel, followed by a direct hardening process, and an induction hardening process on the inner surface most proximal to the central hole of the bushing. The induction hardening on the inner surface may harden the outer portion while tempering the core portion of the bushing.

    HIGH CARBON STEEL TRACK BUSHING
    3.
    发明申请
    HIGH CARBON STEEL TRACK BUSHING 有权

    公开(公告)号：US20210095355A1

    公开(公告)日：2021-04-01

    申请号：US16584158

    申请日：2019-09-26

    申请人： Caterpillar Inc.

    发明人： Chandrasen Rameshlal Rathod ,  Roger Lee Recker ,  Robert Jason Pickerill ,  Scott E. Keele ,  Matthew Thomas Kiser

    IPC分类号： C21D9/00 ,  B62D55/21

    摘要： An example bushing has three portions along its radial direction including an inner portion most proximal to a central hole of the bushing, an outer portion most distal from the center hole, and a core portion between the inner portion and the outer portion. The core portion has a hardness that is less than the hardness of the inner portion or the outer portion of the bushing. The bushing may be formed using high carbon steel, which in some cases may be spheroidal cementite crystal structure. A rough bushing may be formed using the high carbon steel, followed by a direct hardening process, and an induction hardening process on the inner surface most proximal to the central hole of the bushing. The induction hardening on the inner surface may harden the outer portion while tempering the core portion of the bushing.

    Track link structure and pin joint assembly
    5.
    发明授权
    Track link structure and pin joint assembly 有权

    公开(公告)号：US10065692B2

    公开(公告)日：2018-09-04

    申请号：US14825456

    申请日：2015-08-13

    申请人： Caterpillar Inc.

    发明人： Jennifer Ann Brooks ,  Roger Lee Recker

    IPC分类号： B62D55/21 ,  B62D55/205

    摘要： A track link includes a link body having first and second sides, a rail surface, a shoe engaging surface, and first and second end portions. A link pin bore at the first end portion is configured to receive a link pin. A bushing bore at the second end portion is configured to receive a bushing. A link pin boss is located at the first end portion on the first side and surrounds the link pin bore. A bushing boss is located at the second end portion on the second side and surrounds the bushing bore.

    CHAIN ASSEMBLY HAVING A RETENTION FEATURE
    6.
    发明申请
    CHAIN ASSEMBLY HAVING A RETENTION FEATURE 审中-公开
    具有保持特征的链条组件

    公开(公告)号：US20160339974A1

    公开(公告)日：2016-11-24

    申请号：US14718708

    申请日：2015-05-21

    申请人： Caterpillar Inc.

    发明人： Jennifer Ann Brooks ,  Roger Lee Recker

    IPC分类号： B62D55/088 ,  B62D55/092 ,  B62D55/21

    CPC分类号： B62D55/088 ,  B62D55/092 ,  B62D55/21

    摘要： A chain assembly having a retention feature is disclosed. The chain assembly may be used in conjunction with a mobile machine and may include a pair of track links and a track link connector. The track link connector may have an elongate, substantially cylindrical body having a length dimension and having a substantially annular exterior surface and first and second opposing end portions. The first end portion may be inserted into a bore of one of the track links and form an interface therebetween. The interface may have an axial length. The track link connector may further have a retention feature extending 360 degrees around a circumference of the exterior surface of the body at the interface. The retention feature may be a roughened surface and may cover a first portion of the interface closest to a center of the cylindrical body.

    摘要翻译： 公开了具有保持特征的链组件。 链组件可以与移动机器一起使用，并且可以包括一对轨道连杆和轨道连杆连接器。 轨道连杆连接器可以具有细长的基本上圆柱形的本体，其具有长度尺寸并且具有基本上环形的外表面以及第一和第二相对端部。 第一端部可以插入轨道连杆之一的孔中，并在其间形成界面。 界面可以具有轴向长度。 轨道连杆连接器还可以具有围绕身体在界面处的外表面的圆周360度延伸的保持特征。 保持特征可以是粗糙表面，并且可以覆盖最靠近圆柱体的中心的界面的第一部分。

    ROLLER ASSEMBLY FOR GROUND-ENGAGING TRACK SYSTEM
    8.
    发明申请
    ROLLER ASSEMBLY FOR GROUND-ENGAGING TRACK SYSTEM 有权

    公开(公告)号：US20220194496A1

    公开(公告)日：2022-06-23

    申请号：US17128504

    申请日：2020-12-21

    申请人： Caterpillar Inc.

    发明人： Roger Lee Recker ,  Mircea Dumitru ,  Zachary T. Donlan

    IPC分类号： B62D55/15

    摘要： A roller assembly for a ground-engaging track system includes a roller forming a shaft bore, and a roller shaft within the shaft bore and having a circumferential ramp surface. A roller retention system for the roller assembly includes a roller retention collar with an outer peripheral surface, and an inner peripheral surface that may include a wedge surface structured to friction fit the retention collar, within a collar bore in the roller, upon the circumferential ramp surface to limit axial displacement of the roller upon the roller shaft. The roller assembly may include two roller retention collars supporting the roller against axial displacement without use of thrust washers or the like, and fixing the roller and roller shaft to rotate together relative to a track roller frame.

    TRACK CHAIN COMPONENTS WITH HARDFACE OVERLAY
    10.
    发明申请
    TRACK CHAIN COMPONENTS WITH HARDFACE OVERLAY 有权

    公开(公告)号：US20210101651A1

    公开(公告)日：2021-04-08

    申请号：US16591250

    申请日：2019-10-02

    申请人： Caterpillar Inc.

    发明人： Chandrasen Rameshlal Rathod ,  Roger Lee Recker ,  Robert Jason Pickerill ,  Scott E. Keele ,  Douglas Trent Weaver ,  Daniel Joseph Sordelet

    IPC分类号： B62D55/21 ,  F16C33/14 ,  B23K9/04 ,  B23K26/342

    摘要： A steel track chain component, such as a track bushing, may be formed with a carburized portion, a hardface portion, and a core portion. The core portion may be softer than the carburized portion, which in turn, may be softer than the hardface portion. This configuration of the various portions of the component may allow for relatively high wear resistance of the component, as well as toughness. The core portion may be mostly ferrite crystal structure, while the carburized portion and the hardface portions may include martensitic and/or austenitic crystal structure. The carburized portion may be formed by carburizing the track chain component in a heated and carbon rich environment. The hardface portion may be formed by welding a hardface alloy over at least a portion of the carburized portion.