KR-102963706-B1 - Single press ring groove for cartridge pin assembly

KR102963706B1KR 102963706 B1KR102963706 B1KR 102963706B1KR-102963706-B1

Abstract

The forging tool (500) includes one or more forging protrusions (510) each defining a circumferential angle range (532), and the sum of each of these circumferential angle ranges (532) is at least 290 degrees.

Inventors

존스, 벤저민 이삭
패럿, 스탠 로버트
윅스, 앨런 제이.
메이너 아이브이, 조지 에이치.
허드슨, 스콧 에이.

Assignees

캐타필라 인코포레이티드

Dates

Publication Date: 20260513
Application Date: 20210921
Priority Date: 20201016

Claims (10)

As a cartridge pin assembly (600), A pin (602) comprising a cylindrical surface (604), a cylindrical axis (606), a radial direction (608) and a circumferential direction (610), and an annular truncated conical groove (614) formed on the cylindrical surface (604) near the end portion (612) that extends 360 degrees along the circumferential direction (610); and It includes an end collar (616) that extends 360 degrees circumferentially with respect to the truncated conical groove (614) and covers the truncated conical groove (614) axially, A forging tool (500) comprising a plurality of forging protrusions (510), each defining a circumferential angle range (532), wherein the sum of each circumferential angle range (532) is at least 290 degrees, wherein each forging protrusion (510) has a radial thickness (516) in the range of 0.5 mm to 1.0 mm and an axial height (517) in the range of 0.4 mm to 0.8 mm, wherein the plurality of forging protrusions (510) are each spaced apart at an angle in the circumferential direction in the range of 2.0 degrees to 10.0 degrees so that an extrusion limiting surface (514) is formed between them, and a radial outer surface (544) extending radially outward from a contact surface (529) of a forging protrusion (510) in contact with an end collar (616) is formed to be tapered with respect to the central axis of the forging tool (500), wherein the end collar (616) by the forging tool (500) A cartridge pin assembly (600) that is deformed so that a deformed amount of material (617) is forged into a truncated conical groove (614) at least 290 degrees along the circumferential direction (610).
In paragraph 1, the cartridge pin assembly (600) is, The opposite end portion (612a) of a pin (602) having an additional truncated conical groove (614a) formed on a cylindrical surface (604) near the opposite end portion (612a); and It further includes an opposing end collar (618) that extends 360 degrees circumferentially with respect to the additional truncated conical groove (614a) and covers the additional truncated conical groove (614a) axially, A cartridge pin assembly (600) in which the opposing end collar (618) is deformed so that the deformed amount of material (617) is forged into a truncated conical groove (614) at least 290 degrees along the circumferential direction (610).
In paragraph 2, the cartridge pin assembly (600) is, A bushing (620) positioned axially between the end collar (616) and the opposing end collar (618) and positioned circumferentially with respect to the pin (602); A first sealing assembly (622) axially positioned between the bushing (620) and the end collar (616); A second sealing assembly (622a) axially positioned between the bushing (620) and the opposing end collar (618); A first sleeve bearing (624) positioned axially between the end collar (616) and the bushing (620) and positioned circumferentially with respect to the pin (602); and It further includes a second sleeve bearing (624a) that is axially positioned between the opposing end collar (618) and the bushing (620) and circumferentially positioned with respect to the pin (602), wherein A cartridge pin assembly (600), wherein the first sealing assembly (622) extends circumferentially with respect to the first sleeve bearing (624), and the second sealing assembly (622a) extends circumferentially with respect to the second sleeve bearing (624a).
In paragraph 3, the bushing (620) defines a lubrication groove (626) that extends circumferentially with respect to the pin (602) and is axially disposed between the first sleeve bearing (624) and the second sleeve bearing (624a), and the opposing end collar (618) includes a lubrication bore (628) that extends axially through it together with a stopper (630) disposed therein, cartridge pin assembly (600).
A cartridge pin assembly (600) according to claim 1, wherein the truncated conical groove (614) defines an axial taper (A) of less than 15 degrees, and the end collar (616) overlaps the truncated conical groove (614) by a minimum axial distance (634) in the range of 0.05 mm to 3.0 mm.
In claim 1, the end collar (616) is deformed so that the deformed amount of material (617) is forged into the truncated conical groove (614) in a total of 360 degrees along the circumferential direction (610), cartridge pin assembly (600).
In paragraph 1, the end collar (616) comprises a shoulder portion (632), in a cartridge pin assembly (600).
In paragraph 2, the end portion (612) of the pin (602) extends axially through the end collar (616) for a first predetermined distance (636), and the opposite end portion (612a) of the pin (602) extends through the opposite end collar (618) for a second predetermined distance (636a) within 0.2 mm of the first predetermined distance (636), in a cartridge pin assembly (600).
A track chain assembly (300) including a plurality of forged joints, wherein each joint is, A track link (400) comprising an inner end collar (456) having a first bore (458), a pin boss (462) extending outward from therefrom having an outer side (466), and an outer end collar (460) having a second bore (464); and cylindrical pins (306a) that define a cylindrical axis (312a), a radial direction (314), and a circumferential direction (316), and include an end portion (318) that is pressed into each second bore (464) of an outer end collar (460) and mounted non-rotatably, An annular truncated conical groove (320) is formed in the end portion (318) of a pin (306a) that is axially and radially adjacent to the pin boss (462), and the pin boss (462) is a forging tool (500) comprising a plurality of forging protrusions (510), each defining a circumferential angle range (532) and the sum of each circumferential angle range (532) being at least 290 degrees, wherein each forging protrusion (510) has a radial thickness (516) in the range of 0.5 mm to 1.0 mm and an axial height (517) in the range of 0.4 mm to 0.8 mm, and the plurality of forging protrusions (510) are each spaced apart at an angle in the circumferential direction in the range of 2.0 degrees to 10.0 degrees so that an extrusion limiting surface (514) is formed between them, and contact of the forging protrusion (510) that contacts the outer end collar (460). A track chain assembly (300), wherein a radial outer surface (544) extending radially outward from a surface (529) has at least one forged deformation (468) disposed in a truncated conical groove (320) deformed by a forging tool (500) and formed to be tapered with respect to the central axis of the forging tool (500), so that the truncated conical groove (320) includes an angular undercut portion (470) filled at an angle extending at least 290 degrees circumferentially with respect to a cylindrical axis (312a).
In claim 9, a track chain assembly (300) in which at least one forging deformation (468) is divided into a plurality of swage deformations (468) spaced apart from each other in the circumferential direction.

Description

Single press ring groove for cartridge pin assembly The present disclosure generally relates to a track chain for use in stationary work, mining, construction, and other similar machinery utilizing a track-type undercarriage. Specifically, the present disclosure relates to a track link or end collar connected to a track pin via forging. In many current applications, track pins, track links, or end collars of track chain assemblies support the weight of heavy equipment, such as in the use of endless track drives in stationary operations, construction, and mining industries. During use, the connections between track links and track pins may become deformed. For example, track joints are often held together by an interference fit between the end of a track pin and the respective link bore in which the pin end is tightly received. Although very high pressure is applied to press the link onto each pin end, the link or end collar tends to move outward on the pin as a result of the operating force applied to the track during machine operation (sometimes referred to as "movement"). This outward movement can loosen the joint or lead to what is commonly called end clearance. For example, a forging process is sometimes used to deform the pin or link/end collar at the pin/link end, helping to prevent this "movement" phenomenon by allowing the undercut formed at the interface to be filled with material. U.S. Patent No. 6,270,173 discloses a track chain assembly in which a pair of left and right links are each connected by a press-fit into the respective link, and the fixed end surface of a pin or link is continuously and locally pressed and deformed along the axial direction of the pin from the fixed end surface along the inner or outer periphery of the opening of the pin-press-fit hole. Then, a portion of the periphery of the opening of the end of the pin or link is enlarged or reduced in diameter, and the portion with the increased or reduced diameter is maintained and fixed in a matching holding space. Using this fixing method, it is possible to easily and strongly join the link and pin and obtain an axially fixed structure of the link and pin. When the pin is fixed during assembly, a conventional press can be used without special machinery, and the link and pin can be easily and reliably assembled to form a track chain assembly. As shown in Fig. 8 of the '173 patent, a plurality of separate deformation regions spaced apart from each other are formed by this method. The '173 patent does not satisfactorily provide a forging step that creates an appropriate undercut to prevent the "movement" phenomenon for a track chain assembly placed under heavy load. A cartridge pin assembly according to an embodiment of the present disclosure may include a pin, which comprises a cylindrical surface, a cylindrical axis, a radial and circumferential direction, and an end portion. An annular truncated conical groove may be formed on the cylindrical surface near the end portion, which extends 360 degrees along the circumferential direction. An end collar may extend 360 degrees circumferentially with respect to the truncated conical groove and may cover the truncated conical groove axially. The end collar is deformed so that a deformed amount of material is forged into the truncated conical groove at least 290 degrees along the circumferential direction. A forging tool according to an embodiment of the present disclosure may include a rotating body that defines a radial, circumferential, and rotational axis. The body may also have an outer circumferential surface, a pin receiving cavity concentric with the outer circumferential surface, and one or more forging projections disposed adjacent to the pin receiving cavity in a radial and axial direction. One or more forging projections may include a contact surface perpendicular to the rotational axis. An annular surface may be radially interposed between one or more forging projections and the outer circumferential surface. One or more forging projections may define a circumferential angular range, and the sum of each of these circumferential angular ranges around the rotational axis may be at least 290 degrees. A track chain assembly according to an embodiment of the present disclosure may include a plurality of forged joints. Each joint may include a track link and a cylindrical pin. Each track link may include an inner end collar having a first bore through which it passes, and an outer end collar having a second bore through which it passes a pin boss extending outward from therefrom. The boss may include an outer side. Each cylindrical pin may define a cylindrical axis, a radial direction, and a circumferential direction, and may include an end portion that is pressed into and non-rotatably mounted within each second bore of the outer end collar. An annular truncated conical groove may be formed in the end portion of the pin that is axially and radially adjacent to the pin boss, and th