Track shoe roller path for track chains

Abstract

A track chain assembly (100) includes a plurality of interlocking track chain members (500), wherein each track chain member (500) defines a track chain travel direction (T), a lateral direction (L) perpendicular to the track chain travel direction (T), and includes a plate member (502) defining a plate width (W502) along the lateral direction (L); and a first track block member defining a first maximum track block width along the lateral direction; and a second track block member defining a second maximum track block width along the lateral direction, wherein a ratio of any track block maximum width to a plate member width ranges from 1:4 to 3:4.

Description

[0001] This application is a divisional application of the patent application "Roller path for track blocks of crawler chains" with application number 201880042396.2 and application date May 3, 2018. Technical Field

[0002] The present disclosure relates to track chains that use pins to hold the chain together. Specifically, the present disclosure relates to a pin retention design for holding track chain components, such as track shoes or track links, together to help prevent the pins from falling out of the track chain components. Background Art

[0003] In many current applications, track chain components, such as track links or track shoes, are attached to each other using pins that allow the track chain components to rotate relative to each other while still allowing the chain to remain taut when installed on the chassis of a track-type vehicle. If the pins become loose or otherwise fall out of the openings of the track chain components, the track chain could fall out of the chassis of the track-type vehicle, requiring potentially difficult and expensive on-site maintenance. To help prevent this from occurring, various devices have been employed to retain the pins in the openings of the track chain components.

[0004] One such device that has been used is a snap ring with a welded plate on the floating plate, which blocks the pin from exiting the opening in the track chain member. This device presents problems. For example, the welded plate makes it difficult to maintain the pin when needed. Without the welded plate, the snap ring is more likely to twist out of its retaining groove adjacent to the pin retaining opening. Consequently, this solution has proven unsatisfactory in some applications.

[0005] Similarly, another solution is to use a bolt and nut combination to secure the pin in place. However, this often requires welding the nut to the bolt, making servicing the pin difficult. Furthermore, the nut and bolt are often exposed on the sides of the track chain member, making them vulnerable to damage. This can make disassembly difficult.

[0006] In other applications, uneven mine floor conditions can cause wavy track pads or other portions of the track chain components. This can cause high stresses in the outer roller paths because the surface of the track rollers or idlers is no longer flat and parallel against the pads. These high stresses can cause the track chain components to break or spall, requiring unnecessary maintenance. Even on flat surfaces or terrain, the high loads on the track chain components due to the weight of the machine can cause them to break or spall over time. This can also lead to earlier than desired maintenance.

[0007] Similarly, the plate member may flex relative to the track pads of the track chain member when subjected to high stresses resulting from, for example, the weight of the machine and / or payload, movement of the track as it encounters obstacles, and the like.

[0008] Various previous attempted solutions to withstand stress concentrations in track chain components have been to harden the track chain components. However, achieving the desired hardening depth of previous track chain components has proven difficult. Summary of the Invention

[0009] A track chain member according to an embodiment of the present disclosure includes: a plate member defining a track chain travel direction and a lateral direction perpendicular to the track chain travel direction; and a track shoe member extending from the plate member, including a first lug member extending from the plate member in a first direction parallel to the track chain travel direction, a second lug member and a third lug member extending from the plate member in a second direction opposite to the first direction, wherein the first lug member, the second lug member and the third lug member define a Y-shaped configuration, and the first lug defines a first lug width in the lateral direction, and the track shoe member defines a roller support surface, which defines a roller support surface width in the lateral direction, and the first lug width ranges from 40% to 60% of the roller support surface width.

[0010] A track chain assembly according to an embodiment of the present disclosure includes a plurality of interlocking track chain members, wherein each track chain member defines a track chain travel direction, a lateral direction perpendicular to the track chain travel direction, and includes a plate member defining a plate width in the lateral direction; a first track shoe member defining a first track shoe maximum width in the lateral direction; and a second track shoe member defining a second track shoe maximum width in the lateral direction, wherein a ratio of the maximum width of the first track shoe or the second track shoe to a width of the plate member ranges from 1:4 to 3:4. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. In the drawings:

[0012] Figure 1 is a perspective view of a machine, such as an excavator, having a track chain utilizing an embodiment of the present disclosure.

[0013] Figure 2 yes Figure 1 A perspective view of the partially disassembled machine chassis of the machine, which more clearly shows Figure 1 crawler chain.

[0014] Figure 3 yes Figure 2 A perspective view of a track segment of a crawler chain.

[0015] Figure 4is a perspective view illustrating a track pin bushing being pressed into an open hole of a track chain member of a track segment using a hydraulic pressing device according to an embodiment of the present disclosure.

[0016] Figure 5 is a perspective exploded assembly view of a pin retaining device according to an embodiment of the present disclosure positioned relative to a track segment.

[0017] Figure 6 and 7 is an alternative cross-sectional view showing the configuration of the almost fully installed device. Figure 5 Pin retaining device.

[0018] Figure 8 is an enlarged side view of a crawler chain track segment showing the installed Figure 6 and 7 Pin retaining device.

[0019] Figure 9 is a front view of an idler wheel or track roller riding on a contoured dual-pass roller path of a track chain member in accordance with an embodiment of the present disclosure.

[0020] Figure 10 Included are FEA stress plots showing the reduced stress using a contoured roller path according to an embodiment of the present disclosure compared to a conventional design.

[0021] Figure 11 is a perspective view of a track roller riding on several track chain members having track pads according to an embodiment of the present disclosure, the track roller having increased contact surface area compared to previous designs.

[0022] Figure 12 Includes FEA stress plots showing the increase in stress compared to the previous design Figure 11 The width of the track lugs of the track chain components is increased to reduce the stress near the track pin openings.

[0023] Figure 13 is based on Figure 11 A top view of a track pad of a track chain component of an embodiment of the present invention is shown, with an FEA graph depicting the stress on the bearing surface of the track pad.

[0024] Figure 14 FEA stress plots including a baseline design, an intermediate design, and another design according to an embodiment of the present disclosure, showing how track chain components reduce stress.

[0025] Figure 15 is a perspective view of a track chain member including curved ribs according to an embodiment of the present disclosure.

[0026] Figure 16 is shown in an alternative perspective at load time Figure 15 FEA stress plot of a track chain component, showing reduced stress compared to previous track chain component designs.

[0027] Figure 17 yes Figure 16 A magnified view of the FEA stress diagram shows Figure 16 The highest stress exists on the front rib.

[0028] Figure 18 It is shown from the rear perspective Figure 16 The FEA stress diagram of the rear rib shows that the rear rib experiences less stress than the front rib.

[0029] Figure 19 yes Figure 15 A bottom view of a track chain member showing the clearance provided at the bottom of the plate member.

[0030] Figure 20 yes Figure 15 A magnified FEA stress map of the central void of a plate member, showing the maximum stress in this area of ​​the plate member.

[0031] Figure 21 yes Figure 15 A magnified FEA stress map of the center-side void of a plate member, showing the maximum stress in this area of ​​the plate member.

[0032] Figure 22 The plate member 702 is centered along the travel direction T of the crawler chain and is cut along L. Figure 15 A cross-sectional view of a track chain member depicting the shape of the side and center voids of the plate member.

[0033] Figure 23 Another machine in the form of a hydraulic mining bucket is shown that utilizes various track chain components, pin retaining devices, and / or track chains according to embodiments disclosed herein. DETAILED DESCRIPTION

[0034] Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the accompanying drawings to represent the same or similar parts. In some cases, a reference numeral will be indicated in this specification, and the accompanying drawings will show the reference numeral followed by a letter, e.g., 100a, 100b, etc. It should be understood that the use of a letter immediately following the reference numeral indicates that these features have a similar shape and have a similar function, which is typically the case when the geometric structures are mirrored about a plane of symmetry. For ease of explanation in this specification, letters will generally not be included herein, but may be shown in the drawings to indicate repetition of features discussed in this written specification.

[0035] Various embodiments of the present disclosure include a pin retention design that includes a bolt, washer, nut, and spacer positioned near the longitudinal end of the track pin. This prevents the track pin from exiting a track pin opening found in a track chain member when the track chain is in use on a machine.

[0036] Figures 1 to 3 Applications of various embodiments of the pin retaining device of the present disclosure are shown.

[0037] refer to Figure 1 , shows a machine 10 having a frame 12 with a track system 14, including a first track 14a and a second track 14b positioned on opposite sides of the frame 12. Machine 10 is shown in the context of an excavator having an operator's cab 16, a linkage 18, and an implement 20 coupled to the linkage 18. Tracks 14a and 14b are part of a machine chassis 11 that is coupled to the frame 12 in a conventional manner. Each of tracks 14a and 14b includes a plurality of track shoes 60 coupled together to form an endless loop extending around a plurality of rotatable elements. In a typical design, an idler wheel 30 and a drive sprocket 40 will be associated with each of tracks 14a and 14b and mounted to a track roller frame 22. As further described herein, a plurality of track rollers 80 may also be mounted to the roller frame 22 and associated with each of tracks 14a and 14b to support machine 10 and guide tracks 14a and 14b along a desired path. One or more carrier rollers 50 may also be associated with each of tracks 14a and 14b to support and guide the tracks relative to rollers 80 during operation. The unique design of tracks 14a and 14b, and the entire track and undercarriage system of which they are a part, is contemplated to enable machine 10 to operate in certain environments, such as soft underfoot conditions, without the drawbacks associated with many earlier designs. While use in the context of an excavator machine is emphasized herein, it should be understood that machine 10 may include different types of machines. For example, a track-type tractor or even a semi-track-type machine is contemplated herein. Furthermore, machine 10 may comprise a conveyor or other type of machine in which the tracks are used for purposes other than ground-engaging elements. Additionally, the machine may be some type of hydraulic excavator or rope shovel.

[0038] Now also refer to Figure 2 , shows a partially disassembled machine chassis 11 showing portions of the track roller frame 22 and the body 23. Each of the tracks 14a and 14b may include a first track chain 90a and a second track chain 90b. In one embodiment, each track chain 90a and 90b may be positioned at or near opposing edges of each track shoe 60 comprising the respective track. Each of the track chains 90a and 90b may be comprised of alternating inner links 94 and outer links 92. Also referring to Figure 3, shows a segment of track 14a, representing any portion thereof, and is substantially identical to any segment of track 14b. Figure 3 The segment of track 14a shown in FIG. 1 includes three coupled track shoes 60, each having one track link of a first track chain 90a coupled to one track link of a second track chain 90b. Each of the respective track links may be bolted to a respective track shoe using bolts 97. In other embodiments described herein, an integral track link and track shoe may be used.

[0039] Further from Figure 3 Note that each track link may include opposing ends positioned proximate the ends of consecutive track links in the corresponding track chain. Specifically, each outboard track link 92 may include a first end 93a and a second end 93b opposite first end 93a. Each inboard link 94 may also include a first end 95a and a second end 95b. The respective track links may be positioned so that their ends are positioned proximate the ends of adjacent track links arranged side by side. For example, the links having their ends arranged side by side may be straight or S-shaped links. Track pins 96 may extend through adjacent track link ends to couple the track links and, in turn, the adjacent track plates together, regardless of whether the track links and plates are integral with one another or separate components. Each of the inboard links 94 may include an opening 91 in each of the ends 95a and 95b, into which the track pin 96 is press-fitted. Each outboard link 92 may include another opening 99 in each of its ends 93a and 93b, into which track pin 96 fits loosely. A snap ring, a retainer, or some other pin retaining mechanism according to embodiments to be described herein may be used to prevent pin 96 from slipping out of opening 99, etc. End caps 98 may be used to seal opening 99 to retain lubricating fluid therein and to allow access for maintenance, etc. In one embodiment, links 92 and 94 may be formed from a single forging die, and their corresponding openings, etc., may be machined to obtain different sizes for press fit and loose fit.

[0040] Among other things, the present disclosure provides a track system, Figure 3, which differs from known crawler designs in that respective track chains 90a and 90b are used only to couple sets of track shoes 60 together. Also, in contrast to earlier designs, the track chains do not include rails on which the track rollers ride. Instead, the track rollers 80 ride directly on portions of the track shoes 60. This strategy allows the track chains 90a and 90b to be relatively simpler and lighter than conventional crawler chain designs. The track chains 90a and 90b can also be positioned adjacent to the first and second outer edges 61a and 61b of each of the track shoes 60. Positioning the track chains 90a and 90b adjacent to the respective outer edges 61a and 61b enables the track chains 90a and 90b to prevent flexing and separation of the track shoes 60 during certain operating conditions, such as during high vertical loads and in response to certain mechanical stresses. Specifically, as described above with respect to earlier track designs, in the event that one of track shoes 60 is positioned on a relatively hard supporting object, such as a stump or rock, chains 90a and 90b may prevent separation or gap formation between track shoes 60 due to stresses placed thereon.

[0041] As mentioned above, track rollers 80 ride directly on track shoes 60. Each track shoe 60 may include an upper side 63 on which a block 67 is positioned. Block 67 may include a first rail 65a and a second rail 65b configured to support the track rollers during operation. A guide shoe 62 may also be adjacent to each block 67 and may include an integral portion of or be positioned on each block 67. As further described herein, each guide shoe 62 may provide guidance for the track rollers and a drive surface for the corresponding track. Each block 67 may extend generally from a leading edge 64a of each track shoe 60 to a trailing edge 64b of the corresponding track shoe. In one embodiment, block 67 may be integrally formed with each track shoe 60, such as by casting, forging, etc. Each guide shoe 62 may also be integrally formed with block 67. In certain embodiments, an integrated block and guide shoe element may be keyed to and bolted to the track shoe 60. In most versions, each block 67 will provide a thickened area of ​​wear material for wearing against the track rollers. However, in other embodiments, the blocks 67 need not include a thickened wear area at all. While the blocks 67 will generally be rectangular, in other embodiments, they may have alternative shapes. The blocks 67 will generally have a width defined by the outside edges of the tracks 65a and 65b that is less than one-third the width D of the corresponding track shoe. Thus, the term block should be understood to generally refer to the area of ​​each track shoe, or portion or portion thereof coupled thereto, that provides the tracks 65a and 65b for the track rollers, without limitation to shape or configuration.

[0042] It will be further noted that rails 65a and 65b are positioned on the outside of each guide shoe 62 and on the inside of each track chain 90a and 90b. In one embodiment, each of rails 65a and 65b may have a width, Figure 3 As shown by arrow R in FIG, it is less than the distance that the closest outer track chains 90a, 90b are spaced apart from them. In other words, each of the track chains 90a and 90b can be spaced apart from the rails 65a and 65b, respectively, by an average distance greater than the width R of the corresponding rail. In some embodiments, the track chains 90a and 90b can be spaced apart from the rails 65a and 65b by an average distance greater than twice the width of the corresponding rail. Thus, the distance that the track chains 90a and 90b are spaced apart from the rails 65a and 65b is greater than the width R of the corresponding rail. Figure 3 Indicated by arrow A. Figure 3 The illustration also shows some of the relative dimensional characteristics of each track shoe 60. It should be noted that each track shoe 60 has a length shown via arrow L that is less than the length shown via arrow L. Figure 3 The arrow D shows half of its width.

[0043] As described above, tracks 14a and 14b are considered well-suited for operating under soft-foot conditions. To this end, tracks 14a and 14b may be "low ground pressure" tracks, each having a track shoe 60 with a relatively large ground contact area for distributing the pressure from the weight of machine 10 over a relatively large surface area. Each of track shoes 60 has a footprint defined in part by a leading edge 64a and a trailing edge 64b, and also in part by outboard edges 61a and 61b. Each of track shoes 60 may further include a ground contact area that is equal to its footprint, or less than its footprint only to the extent that adjacent track shoes overlap one another. Grousers 69 are associated with each of track shoes 60 and may extend downwardly from an underside thereof, which is positioned opposite upper side 63.

[0044] Despite Figure 1 and Figure 2 Although not clearly shown, the pin retaining device 300 according to an embodiment of the present disclosure may be located on a crawler chain member (such as Figure 3 At the front portion 93a or the rear portion 93b of the track portion of the track shoe 60).

[0045] Figure 4-8 Another configuration of a track chain member 200 in the form of a track shoe 104 is shown, wherein the integral link member 106 utilizes a pin retaining device 300 according to an embodiment of the present disclosure. The track chain member 200 may be used with Figure 1-3 is constructed differently from the Figure 1-3In other embodiments, the track chain components may be track shoes or track link components that are separate from one another, such as when the track shoes are attached to the track link components via fastening or the like.

[0046] like Figure 5-7 As best seen in FIG, track chain assembly 100 may include a plurality of track chain segments 102. Track chain segments 102 typically include two track chain members 200, such as plates and / or links. Track chain members 200 are typically attached to one another via track pins 108, allowing track chain members 200 to rotate relative to one another, imparting sufficient flexibility to track chain assembly 100 so that the chain can change shape from flat (e.g., when segments 102 contact flat ground) to curved (e.g., when segments 102 contact uneven ground or are wrapped around a drive sprocket or idler wheel, etc.).

[0047] Track chain assembly 100 generally includes a plurality of track chain segments 102, with at least one track chain segment including two track chain members 200 and a track pin 108. Track pin 108 may be cylindrical, defining a longitudinal axis L108, a first end 110 along axis L108, and a second end 112. Pin 108 may be inserted into track pin openings 202 in track chain members 200 to connect track chain members 200 together, allowing track chain members 200 to rotate relative to each other.

[0048] As previously mentioned, a pin retaining device 300 may be provided that includes a member 302 proximate first end 110 of track pin 108. Pin retaining device 300 may define a longitudinal axis L300 that is non-parallel to longitudinal axis L108 of track pin 108.

[0049] like Figure 6 and 7 As best seen in FIG, at least one track chain member 200 may define a track pin aperture 202 having a shoulder 204 disposed proximate second end 112 of track pin 108. In an embodiment, at least one track chain member 200 may define an aperture 206 at least partially defined by shoulder 204, and wherein aperture 206 is in communication with track pin aperture 202.

[0050] like Figure 6 As best seen in FIG, longitudinal axis L300 of pin retaining device 300 may be orthogonal to longitudinal axis L108 of track pin 108 at an angle α.

[0051] Similarly, if Figure 8As best seen in FIG. 1 , the track chain members define a direction of travel 114, and the longitudinal axis L300 of the pin retaining device 300 forms an inclination angle β with the direction of travel 114. In this embodiment, the inclination angle may be in the range of 20 to 50 degrees, and in some cases, may be approximately 35 degrees. This angle may vary as needed or desired.

[0052] Back to reference Figure 6 Pin retaining device 300 includes a spacer 304, and the spacer defines a length L304. At least one track chain component 200 defines a pin retaining device opening 208, which defines a penetration depth D208. The length L304 of spacer 304 exceeds penetration depth D208 by a predetermined amount 210. This allows the pin retaining device to float within the pin retaining device opening along the L300 axis. A washer 306 may also be disposed between track chain component 200 and spacer 304 to help prevent deformation of track chain component 200, which could result in torque loss on fastener 308, leading to loosening and eventual failure of pin retaining device 300. It is contemplated that the washer may be omitted in some circumstances, such as when the washer is integrated or integral with the head of the fastener, or when the head of the fastener is larger in size compared to the spacer. That is, for example, the diameter of the head is larger than the diameter of the spacer, etc.

[0053] like Figure 6 and 7 As shown in FIG, after track chain segment 102 has been fully assembled, when track pin 108 is disposed in track pin aperture 202 and pin retaining device 300 is inserted into pin retaining device aperture 208, when track pin 108 is fully inserted into aperture 202, pin retaining device 300 is spaced apart from track pin 108 by a predetermined distance 212 such that pin 108 contacts shoulder 204 at opposite ends of aperture 202. Thus, the pin can move along the L108 axis before contacting nut 302 or other components of pin retaining device 300.

[0054] See together Figure 6-8 , bushings 116 may be provided to provide lubrication or other means of reducing friction so that the joint formed between track chain member 200 and pin 108 can rotate more freely. Figure 6-8 As shown, separate bushing members 116, 116', 116" may be provided in each of track pin openings 202, 202', 202", or a single bushing member may be provided that extends through all track pin openings. In other embodiments, bushings may be omitted. For example, self-lubricating pins may be provided, which in some embodiments eliminate the need for bushings, etc.

[0055] Now refer to Figure 4-8Track chain member 200 according to an embodiment of the present disclosure may include plate member 104 and first track member 214 extending from plate member 104, wherein track member 214 defines a maximum dimension D214, and track chain travel direction 114 is generally parallel to maximum dimension D214. Track chain member 200 may further define a track pin opening 202 defining a longitudinal axis L202 that is perpendicular to track chain travel direction 114 when longitudinal axis L202 and track chain travel direction 114 are projected onto the same plane (best seen at Figure 5 ), and a pin retaining device opening 208 defining a longitudinal axis L208, wherein the longitudinal axis L208 of the pin retaining device opening 208 and the longitudinal axis L202 of the track pin opening 202 are not parallel (best seen at Figure 8 (in Chinese). Figure 4-8 As shown, the plate member and the track member can be integral with each other. For other embodiments of the present disclosure, this may not be true.

[0056] As previously referenced Figure 6 As previously mentioned, the longitudinal axis L208 of the pin retaining device opening 208 and the longitudinal axis L202 of the track pin opening 202 form an angle α that is perpendicular to each other. Figure 8 As mentioned above, the longitudinal axis L208 of the pin retaining device opening 208 and the crawler chain travel direction 114 form an inclination angle β with each other.

[0057] Now focus on Figure 4 and 5 Track chain member 200 may further include a second track member 216 extending from plate 104 in the same direction as first track member 214, with a recess 218 defined between first and second track members 214, 216. Additionally, track chain member 200 may include a third track member 220 extending in a direction opposite to the direction in which first and second track members 214, 216 extend, with third track member 220 aligned with recess 218 along longitudinal axis L202 of track pin opening 202. In the illustrated embodiment, first, second, and third track members 214, 216, and 220 form a Y-shaped configuration. However, other configurations are possible with other embodiments of the present disclosure.

[0058] Figure 5-8An embodiment of a pin retaining device 300 is disclosed. The device includes a fastener 308 defining a longitudinal axis L308, a first end 310 and a second end 312 along the longitudinal axis L308, a head 314 at the first end 310 and a threaded portion 316 at the second end 312, a tubular spacer 304 defining a throughbore 318 configured to receive the fastener 308, and a nut 302 defining a threaded bore 320 configured to mate with the threaded portion 316 of the fastener 308. For the reasons described above, the device 300 may also include a washer 306 defining a central aperture 322 configured to receive the fastener 308.

[0059] See for example Figure 5 and Figure 6 Fastener 308 is best seen in FIG. Fastener 308 includes a shank 324 disposed between a head 314 and a threaded portion 316. Once the device is fully installed, washer 306 is positioned between head 314 and tubular spacer 304. Nut 302 includes a rectangular configuration, which maximizes the surface area of ​​its flat side 326. This allows the nut to provide sufficient bearing surface area when the pin 108 comes loose and contacts flat side 326. Furthermore, fastener 308 takes the form of a bolt 328, which includes a hexagonal head 314. A socket 330 is provided to mate with head 314, while a wrench can still be used to hold nut 302 in place while bolt 328 is tightened. This continues until washer 306 is sandwiched between head 314 of fastener 308 and spacer 304. Pin retainer 300 floats freely within pin retainer aperture 208 because spacer 304 is longer than the depth of aperture 208, as previously explained.

[0060] like Figure 4 As shown, a hydraulic pressing device 118 can be used to press pin bushing 116 into track pin opening 202 of track chain member 200. Bracket 120 can be placed between two track members 214', 216 to provide support so that the track members do not bend during the pressing operation. The track pin can then be inserted into the opening using a similar hydraulic device.

[0061] Other embodiments of the present invention may provide structures to help reduce spalling or breakage of track chain components. Figure 9 and Figure 10 The crawler chain member 400 may include a plate member 402 and a first track member 404 extending from the plate member 402, wherein the first track member 404 defines the crawler chain travel direction 114 (the direction perpendicular to the Figure 9 and 10 , and in Figure 1-38) and a lateral direction L that is generally perpendicular to the track chain travel direction 114. First track member 404 may also include a first bearing surface 406 that extends generally in both the track chain travel direction 114 and the lateral direction L, defining an outboard lateral end 408, and a first peak member 410 that is laterally disposed adjacent outboard lateral end 408 of first bearing surface 406. The "outboard lateral end" is so called because it is closest to the outboard portion of the track chain member toward the outside of the machine once the track chain assembly is mounted on the chassis of the machine. The plate member and any track members may or may not be integral with one another.

[0062] In such Figure 9 and Figure 10 In some embodiments shown in FIG, the plate member 402 and the first track member 404 define metal outer surfaces. Typically, the plate member and the first track member are substantially constructed of a metal material such as cast iron, steel, or the like.

[0063] Now focus on Figure 9 , first peak member 410 defines a width W410 along a lateral direction L, a vertical direction V perpendicular to both the lateral direction L and the track chain travel direction 114, and a height H410 along the vertical direction V, wherein width W410 exceeds height H410. Track chain member 400 may also include a second track member 412 extending from plate member 402, wherein second track member 412 defines the track chain travel direction 114 and a lateral direction L generally perpendicular to the track chain travel direction 114. Track chain member 400 may further define a second support surface 414 extending generally in both the track chain travel direction 114 and the lateral direction L, defining an inner lateral end 416 and a second peak member 418 disposed laterally adjacent to inner lateral end 416 of second support surface 414. The "inboard end" is so called because it is the inboard portion of the track chain member closest to the inside of the machine once the track chain assembly is installed on the chassis of the machine.

[0064] Second peak member 418 may define a width W418 along lateral direction L, a vertical direction V perpendicular to lateral direction L and track chain travel direction 114 , and a height H418 along vertical direction V, wherein width W418 exceeds height H418 .

[0065] Widths W410 and W418 can range from 40 to 200 mm. Similarly, heights H410 and H418 can range from 40 to 200 mm. Furthermore, the second support surface 414 defines a second support surface width W414 along the lateral direction L, and the ratio of the height H418 of the second peak-shaped member 418 to the second support surface width W414 ranges from 1:1 to 1:3. In other embodiments, these dimensions can vary as needed or desired.

[0066] It should be noted that Figure 9 and 10 The track chain member 400 of the embodiment shown in FIG, as well as other figures of this disclosure, can have features that are substantially symmetrical about a midplane M located midway between the track members 404, 412. As will be discussed later herein, one difference is that the features can be rotated about the midplane. The features of the track members 404, 412, including the peak members 410, 418, can be symmetrical and / or have similar or identical dimensions, etc.

[0067] As previously mentioned herein, a track chain assembly 100 may be provided that includes a plurality of track chain segments 102. The plurality of track chain segments may include at least one track chain segment that includes two track chain members 400, wherein at least one track chain member 400 includes a plate member 402 and a first track member 404 extending from plate member 402. First track member 404 defines a track chain travel direction 114 and a lateral direction L perpendicular to track chain travel direction 114; a first support surface 406 that extends generally in both track chain travel direction 114 and lateral direction L and defines an outer lateral end 408; and a first peak member 410 that is laterally disposed adjacent to outer lateral end 408 of first support surface 406.

[0068] Track chain member 400 may also include a second track member 412 extending from plate member 402, wherein second track member 412 defines the same track chain travel direction 114 and the same lateral direction L as first track member 404; a second bearing surface 414 extending generally in both track chain travel direction 114 and lateral direction L, defining an inner lateral end 416; and a second peak member 418 disposed laterally adjacent to inner lateral end 416 of second bearing surface 414. First track member 404 is spaced apart from second track member 412, defining a groove 420 therebetween. This groove 420 is configured to receive a guide ridge 422 of an idler wheel or track roller 424, etc., to help retain the track on the chassis.

[0069] like Figure 9 As shown, first bearing surface 406 and second bearing surface 414 are coplanar. This may not be the case in other embodiments. As previously mentioned, track chain member 400 defines a midplane M, and first peak-shaped member 410 and second peak-shaped member 418 are symmetrically shaped about midplane M for this embodiment. In other embodiments, this may not be the case.

[0070] Return Reference Figure 10Track chain member 400 further defines a concave arcuate surface 426, such as a radius connecting first bearing surface 406 to first peak member 410. More specifically, first peak member 410 defines a first angled surface 428 that forms a first oblique angle with lateral direction L. And the concave arcuate surface 426 joins the first bearing surface 406 with a first angled surface 428. Similarly, the first peak member 410 defines a convex arcuate surface 430, such as a radius near the apex of the first peak member 410. The first peak member 410 defines a straight surface 432 near the apex. Alternatively, the convex arcuate surface 430 may define an apex without any straight surfaces. In addition, the first peak member 410 defines a second angled surface 434 on the opposite lateral side of the first peak member 410 compared to the first angled surface 428, wherein the second angled surface 434 forms a second inclination angle γ with the lateral direction L. Although not illustrated in the figures, another convex arcuate shape may blend the top straight surface 432 with the second angled surface 434.

[0071] It is contemplated that the various dimensions of the first peak member 410 may vary as needed or desired. For example, the first inclination angle The range of the second tilt angle γ can be 1 to 30 degrees. Similarly, the range of the second tilt angle γ can be 0 to 180 degrees. The second tilt angle can be greater than Figure 9 and Figure 10 The first inclination angle shown. In other embodiments, this may not be the case. In other embodiments, any of these dimensions can be changed as needed or desired.

[0072] Figure 11-14 An embodiment of a track shoe roller path is shown that reduces the likelihood of a track chain or track chain component breaking or peeling when subjected to heavy loads during use. Figure 11 and 13 As best shown, a track chain member 500 according to the disclosed embodiment may include a plate member 502 defining a track chain travel direction T and a lateral direction L perpendicular to the track chain travel direction T, and a track shoe member 504 extending from the plate member 502 and configured to support the weight of the machine as the weight of the machine is transferred to the track shoe member 504 via track rollers 506 or the like. Track shoe member 504 may include a first lug member 508 extending from the plate member 502 in a first direction 510 parallel to the track chain travel direction T, a second lug member 512, and a third lug member 514, each extending from the plate member 502 in a second direction 516 opposite the first direction 510.

[0073] As previously mentioned herein, the first lug member 508, the second lug member 512, and the third lug member 514 define a Y-shaped configuration, and the first lug 508 defines a first lug width W508 along the lateral direction L. Figure 13 , first track pad member 504 defines a roller bearing surface 518 that defines a roller bearing surface width W518 along lateral direction L, and first lug width W508 is within a range of 40-60% of roller bearing surface width W518. Figure 11 , first lug 508, second lug 512, and third lug 514 define a track pin opening 520 for receiving a track pin. The various dimensions and ratios can be varied as needed or desired. For example, first lug width W508 can range from 96 mm to 106 mm, while roller bearing surface width W518 can range from 191 mm to 211 mm. Return to Reference Figure 13 , the second lug member 512 is spaced apart from the third lug member 514 to at least partially define a gap 522 therebetween, and the first lug member 508 is laterally aligned with the gap 522 .

[0074] See also Figure 11 and Figure 13 This arrangement allows, when assembling track chain assembly 524 using similarly configured track chain members 500, first lug member 508 to be inserted into gap 522, allowing a track pin to be inserted through track pin opening 520 of second lug member 512 or third lug member 514 into track pin opening 520 of the first lug member and the other of second lug member 512 or third lug member 514 to form a swivel joint. Taking into account clearances and manufacturing tolerances, all track pin openings 520 may have substantially the same diameter. In other embodiments, this configuration or feature may not exist or vary in scope.

[0075] Return Reference Figure 13 , second lug member 512 defines a second lug member width W512 along lateral direction L, third lug member 514 defines a third lug member width W514 along lateral direction L, and first lug member width W508 is different from second lug member width W512 and third lug member width W514. In other embodiments, this may not be the case. Similarly, first lug member width W508 is greater than second lug member width W512 but less than third lug member width W514. In other embodiments, this may not be the case.

[0076] Track chain member 500 can define a center of mass C and a central axis CA passing through center of mass C, wherein the central axis is perpendicular to the lateral direction L and the track chain travel direction T. The geometry of track chain member 500 can be described as comprising a circular array, wherein first lug member 508, second lug member 512, and third lug member 514 are rotated 180 degrees about the central axis to form fourth lug member 526, fifth lug member 528, and sixth lug member 530, respectively. Track chain member 500 can further define a central groove 532 located at central axis CA, wherein central groove 532 extends generally in the track chain travel direction T. This feature can allow guide ridges 534, etc. of track roller 506 to ride therein, helping to prevent track chain assembly 524 from falling off the undercarriage of the machine. The bearing surface 518 of the track pad may have a width W518 corresponding to a portion 536 of the roller 506 such that the contact surface between the track roller and the track pad is maximized to reduce stress on the track pad.

[0077] Continue to refer Figure 11 and 13 A track chain assembly 524 according to an embodiment of the present disclosure may be provided. Track chain assembly 524 may include a plurality of interlocking track chain members 500, wherein each track chain member 500 defines a track chain travel direction T and a lateral direction L perpendicular to the track chain travel direction T. Each interlocking track chain member 500 may include a plate member 502 defining a plate width W502 along the lateral direction L, a first track shoe member 504 defining a first track shoe maximum width W504 along the lateral direction L, and a second track shoe member 504' defining a second track shoe maximum width W504' along the lateral direction L. The ratio of either the first track shoe maximum width W504 or the second track shoe maximum width W504' to the plate member width W502 may range from 1:4 to 3:4.

[0078] Focus Figure 11 , first track shoe member 504 is spaced apart from second track shoe member 504' by a predetermined distance D504 along lateral direction L. As previously described herein, first track shoe member 504 and second track shoe member 504' each include a first lug member 504 extending from plate member 502 in a first direction 510 generally parallel to the track chain travel direction T, and a second lug member 512 and a third lug member 514, each extending from plate member 502 in a second direction 516 opposite to first direction 510. First lug member 508 defines a first lug member width W508 along lateral direction L, and first lug member width W508 is within a range of 40-60% of the first maximum track shoe width W504 or the second maximum track shoe width W504'. In other embodiments, any of these dimensions may vary as needed or desired.

[0079] Now refer to Figure 15 and Figure 16 , a track chain member according to another embodiment of the present disclosure is shown and will be described. Track chain member 600 may include a plate member 602 that defines a track chain travel direction T and a lateral direction L perpendicular to track chain travel direction T, while also defining a first lateral end 603 and a second lateral end 605 of plate member 602. Track chain member 600 also includes a first track shoe member 604 extending from plate member 602, including a first lug member 608 extending from plate member 602 in a first direction 610 parallel to track chain travel direction T, a second lug member 612, and a third lug member 614, each extending from plate member 602 in a second direction 616 opposite first direction 610. The arrangement of first lug member 608, second lug member 612, and third lug member 614 defines a Y-shaped configuration.

[0080] Track chain member 600 further includes a first rib 606 disposed proximate first lug member 608 in the track chain travel direction T to extend generally from first track shoe member 604 to first lateral end 603 of plate member 600 in lateral direction L. First rib 606 may define a first concave radial portion 636. Additionally, track chain member 600 may include a second rib 607 disposed proximate second lug member 612 in the track chain travel direction T to extend generally from track shoe member 604 to first lateral end 603 of plate member 602 in lateral direction L.

[0081] In some embodiments, the first concave radial portion 636 defines a radius 638 ranging from 50 to 900 mm. In other embodiments, this value may vary as needed or desired.

[0082] like Figure 16 As best seen in FIG. 6 , plate member 602 may include a ground engaging portion 640 disposed proximate first lateral end 603, and plate member 602 may define a recess 642 bounded by first lug member 608, first rib 606, and ground engaging portion 640 disposed proximate first lateral end 603. In some embodiments, track chain member 600 may further include a transition surface 644 that at least partially defines recess 642, wherein transition surface 644 is bounded by first lug member 612, ground engaging portion 640, and first rib 606. Transition surface 644 may include a radial portion 646, a ramped portion, etc. This surface may provide clearance so that a second lug member of a similar track chain member may fit into the recess when the track chain assembly is assembled.

[0083] See also Figure 15 and Figure 16 , the ground-engaging portion 640 may extend from the first lug member 608 to the second lug member 612 to the first lateral end 603. The first lug member 608 may be spaced apart from the first lateral end 603 by a first lateral distance 648, and the second lug member 612 may be spaced apart from the first lateral end 603 by a second lateral distance 650. Furthermore, the first rib 606 extends from the first lug member 608 to the ground-engaging portion 640 of the plate member 602 by a first rib lateral distance 652 that is 90 to 100% of the value of the first lateral distance 648. Similarly, the second rib 607 extends from the second lug member 612 to the ground-engaging portion 640 of the plate member 602 by a second rib lateral distance 654 that is 90 to 100% of the value of the first lateral distance 648. These distances may vary as needed or desired. In many embodiments, the overlap of these distances may be substantial, that is, 75% or greater.

[0084] The height of the ribs 606, 607 is similar to the height of the track pad measured in the vertical direction of the track chain member. Figure 15 and 16 As shown in FIG, first rib 606 may be in the range of 90 to 100% of the height of track pad 604, while second rib 607 may be in the range of 75 to 100% of track pad 604. In other embodiments, these dimensions may again vary as needed or desired.

[0085] As previously discussed herein, the track chain assembly 100 (see Figure 1 ) can be assembled by interlocking a plurality of crawler chain members 600, the crawler chain members being connected to the crawler chain members as shown in FIG. Figure 15 and Figure 16 The series of track chain components 600 shown are similarly or identically constructed. Track chain components of other configurations, such as master links, etc., may also be attached to multiple track chain components of the same or similar configuration.

[0086] In addition, as referenced Figure 15 、 16 , 19 and 22, each of the plurality of track chain members 600 can define a center of mass C and a central axis CA passing through the center of mass C, wherein the central axis CA is perpendicular to the lateral direction L and the track chain travel direction T, and the track chain members 600 can include a circular array in which the first lug member 608, the second lug member 612, and the third lug member 614 can be rotated 180 degrees about the central axis to form the fourth lug member 626, the fifth lug member 628, and the sixth lug member 630. Other features, such as the first rib 606, the second rib 607, the notch 642, and the ground engaging portion 640 can also be rotated as part of the array.

[0087] Now focus on Figure 19 and 22 , various features of a track chain member that allow for a more consistent thickness will be discussed. As shown, track chain member 700 may include a plate member 702 that defines a track chain travel direction T and a lateral direction L perpendicular to track chain travel direction T. Plate member 702 may further define a first lateral end 703, a second lateral end 705, and a ground engaging surface 740 spanning from first lateral end 703 to second lateral end 705. Plate member 702 may further define a first side gap 756 proximate first lateral end 703 and a second side gap 758 proximate second lateral end 705, with first side gap 758 terminating a first predetermined distance 760 from first lateral end 703 and second side gap 758 terminating a second predetermined distance 762 from second lateral end 705. More specifically, the ground engaging surfaces may define the first side gap and the second side gap. Thus, the first side gap and the second side gap are not encapsulated within the plate member. In other embodiments this may not be the case.

[0088] Additionally, the plate member 702 may further define a main central void 764 that is centered in the lateral direction L of the plate member relative to the first lateral end 703 and the second lateral end 705. Track chain member 700, wherein the plate member 702 further defines a first auxiliary void 766 in communication with the main central void 764, and the main central void 766 defines a first lateral end 768, and the first auxiliary void 766 is positioned proximate to the first lateral end 768 of the main central void 764. The plate member 702 may further define a second auxiliary void 770 in communication with the main central void 764, and the second auxiliary void 770 is positioned proximate to the second lateral end 772 of the main central void 764. Again, the main central void may be defined by a ground engaging surface such that the void is not enclosed in the plate member. As Figure 19 As noted, the side surfaces 768, 772 of the main center void may be angled relative to the lateral direction L or the track chain travel direction T. Figure 22 As best seen in FIG, the main central void 764 may define a main central void depth D764 in a direction CA perpendicular to the ground-engaging surface 740, the first auxiliary void 766 may define a first auxiliary void depth D766 in a direction CA perpendicular to the ground-engaging surface 740, and the second auxiliary void 770 may define a second auxiliary void depth D770 in a direction CA perpendicular to the ground-engaging surface 740, with the first auxiliary void depth D766 and the second auxiliary void depth D770 being greater than the main central void depth D764. In some embodiments, these depths may be the same.

[0089] As previously discussed herein, the track chain assembly 100 (see Figure 1) can be assembled by interlocking a plurality of crawler chain members 700, the crawler chain members and the like. Figure 19 and Figure 22 The series of track chain components 700 shown are similarly or identically constructed. Track chain components of other configurations, such as master links, etc., may also be attached to multiple track chain components of the same or similar configuration.

[0090] Focus again Figure 22 The track chain assembly may include a plurality of interlocking track chain members 700, wherein each track chain member 700 defines a track chain travel direction T, a lateral direction L perpendicular to the track chain travel direction T, and includes a plate member 702 defining a first lateral end 703, a second lateral end 705, and a ground engaging surface 740 spanning from the first lateral end 703 to the second lateral end 705. As shown, a first track member 704 may extend from the plate member 702 disposed proximate the first lateral end 705, and a second track member 706 may extend from the plate member 702 disposed proximate the second lateral end 705 spaced apart from the first track member 704, defining a central recess 707 therebetween.

[0091] refer to Figure 15 and 22 Track chain member 700 may include first rib 606 and second rib 607 extending between first track member 704 and first lateral end 703 of plate member 702. Similarly, there may be third rib 708 and fourth rib 710 extending between second track member 706 and second lateral end 705 of plate member 702.

[0092] See also Figure 22 , a main central void 764 is defined by the ground-engaging surface 740 of the plate member 702 disposed below the central recess 707 in a direction perpendicular to the ground-engaging surface 740. A first side void 756, adjacent the first lateral end 703, is bounded by the ground-engaging surface 740 and spaced from the main central void 764, and a second side void 758, adjacent the second lateral end 705, is bounded by the ground-engaging surface 740 and spaced from the central void 764. The first side void 756 is bounded on either side in the track chain travel direction T by the first rib 606 and the second rib 607. That is, the first side void does not extend further in the track chain travel direction beyond any portion of the first or second ribs. Similarly, the second side void 758 is bounded on either side in the track chain travel direction T by the third rib 708 and the fourth rib 710.

[0093] For this particular embodiment, the plate member 702 defines a first curved surface 774 at the bottom of the first side void 756 and a second curved surface 774' at the bottom of the second side void 758. This may not be the case in other embodiments. The central recess 707 defines a width W707 along the lateral direction L, and the first auxiliary void 766 and the second auxiliary void 770 are separated from each other by a distance 776 along the lateral direction L that is greater than the width W707 of the central recess 707.

[0094] Figure 22 Track chain member 700 is shown defining a cross-section taken along a lateral direction L centered along the track chain travel direction T with plate member 702, and a thickness T702 measured along a direction CA perpendicular to ground engaging surface 740 that varies along lateral direction L. For this embodiment, thickness T702 is greatest in an area disposed between first side void 774 and main center void 764 or second side void 758 and main center void 764.

[0095] Industrial Applicability

[0096] In practice, a track chain assembly, track chain components, and / or pin retaining devices according to any of the embodiments discussed herein can be sold, manufactured, purchased, etc., and attached to a machine in either an aftermarket or original equipment situation. That is, the machine can be sold with a track chain assembly, track chain components, and / or pin retaining devices according to the embodiments described herein, or the machine can be modified, repaired, or refurbished to utilize any of the embodiments discussed herein. The various components, including but not limited to the track chain components, can be made from any suitable material, such as cast iron, gray cast iron, steel, etc.

[0097] In one specific application, it has been determined that M36 bolts can be used as fasteners for the pin retaining device. In this application, the bolts can be tightened using a torque of 2400 NM or greater, and the resulting connection may not experience loosening during a period of 20,000 hours of track operation. The device can also withstand a shear force of 490 kN. If the device is spaced from the track pin as described earlier in this document, the torque from the rotating track pin may not be effectively transferred to the device, mitigating the risk of the device becoming loose over time. As previously mentioned, hand tools may be sufficient to install the pin retaining device.

[0098] exist Figure 10, the right half of this figure from mid-plane M shows what happens when the idler or track roller 424 is angled relative to the track chain member 400, as shown by line 436 angled relative to the lateral direction L. This simulates what happens when a track chain member 400 having a peak member 410 experiences uneven or angled terrain in use. The amount of stress generated by this situation can be seen by the various cross-hatching in the concentric rings located near the outboard end 408. On the other hand, the left half of this figure from mid-plane M shows what happens when the idler or track roller is angled relative to the track chain member (as shown by line 438 angled relative to the lateral direction L). This, in turn, simulates what happens when a track chain member without a peak member experiences uneven or angled terrain. Without the peak member, the amount of stress is significantly greater. Therefore, one skilled in the art would expect to use a peak member to reduce the likelihood of breakage or spalling, etc., to help reduce the need for maintenance.

[0099] for Figure 11 and 13 The embodiments disclosed in Figure 12 The FEA stress diagram of the previous design of the track lug is shown in its upper left corner, while it also shows in its lower right corner such as Figure 11 and 13 The FEA stress map of the first track lug 508 shows a reduction in stress. This reduction in stress indicates to one skilled in the art that the new design is less likely to break or peel than the previous design.

[0100] same, Figure 14 Shown, the previous design shown on the far left is Figure 11 and 13 The embodiment shown (see the middle portion marked 500) and Figure 11 and 13 Another embodiment not shown in FIG (labeled 550 on the far right) has higher stresses. Therefore, the improved design will likely experience less cracking and spalling. Figure 15 and 16 The embodiments disclosed in Figure 16 The stress diagram in FIG shows that the maximum stress under the simulated operating conditions is about 1400 MPa on the top portion of the track pad. Figure 15 Previous designs, in contrast to the 16 rib design, were determined to have peak stresses as high as 2300 MPa using similar FEA modeling scenarios. Figure 17 and 18 It is shown that the first and second ribs experience a maximum stress of approximately 929 MPa. This again indicates a low likelihood of fracture or spalling.

[0101] for Figure 15 、 19and the embodiment shown in 22, Figure 20 and 21 The stress graph in FIG. 7 shows that in certain embodiments, the use of side voids 756, 758 and a central void 764 and the use of curved ribs allow the stress to be reduced to about 500-650 MPa in the corner 778 of the central void 764 (see FIG. 7 ). Figure 20 ), and the stress in the region 780 near the lateral ends 703, 705 is reduced to about 600-800 in the side gaps 756, 758 (see Figure 21 For previous designs that used laterally extending grooves on the bottom of the track shoe, similar areas experienced maximum stresses in the range of 1700-1900 MPa. This again indicates a reduced likelihood of fracture or spalling.

[0102] Figure 23 An embodiment of a track machine 800 in the form of a hydraulic excavator is shown that includes an embodiment of a track system 802 constructed according to the principles of the present disclosure. Hydraulic excavators may be used to load overburden and ore into haul trucks during the mining process in various surface mining applications, among other uses.

[0103] While this arrangement is illustrated in conjunction with a hydraulic mining excavator, the arrangement disclosed herein has general applicability to various other types of machines that typically employ a track system as opposed to wheels. The term "machine" may refer to any machine that performs some type of operation associated with an industry such as mining or construction, or any other industry known in the art. For example, the machine may be an excavator, a wheel loader, a cable shovel, or a dragline. Furthermore, one or more implements may be connected to the machine. These implements may be used for a variety of tasks, including, for example, lifting and loading.

[0104] like Figure 23 As shown, machine 800 may include a body 804 having a cab 806 to accommodate a machine operator. The machine may also include a boom system 808 pivotally connected to body 804 at one end and supporting an implement 810 at an opposite distal end. In embodiments, implement 810 may be any suitable implement, such as a bucket, a clamshell, a blade, or any other type of suitable device. A control system may be housed in cab 806 and adapted to allow the machine operator to steer and articulate implement 810 for digging, excavating, or any other suitable application.

[0105] The body 804 may be supported on a main frame 812 supported on an undercarriage structure 814. The undercarriage structure 814 includes a support structure 818 that supports a track system 802 for movement of the machine 800. The track system 802 may include a first track roller frame assembly and a second track roller frame assembly 816 that are spaced apart from and adjacent respective first and second sides of the undercarriage structure 814. It will be appreciated that in Figure 23 Only one of the track roller frame assemblies 816 is visible.

[0106] Each of the track roller frame assemblies 816 carries an idler wheel 820, a drive sprocket 822, and a plurality of track guide rollers 824. The drive sprockets 822 are powered by the machine 800 in the forward and rearward directions. An endless track chain assembly 826 surrounds each of the drive impellers 822, idler wheels 820, and track guide rollers 824. The track chain assembly 826 includes a plurality of interconnected track blocks 828, also referred to herein as track chain members. The track guide rollers 824 guide the track blocks 828 as the track chain assembly 826 is driven by the drive sprockets 822. The track chain assembly 826 may have any of the track chain members, track pin retaining devices, and / or track chain assemblies previously described herein. It should be noted that Figure 23 The contents of indicate that the apparatus disclosed by US Patent No. 9,409,613 may be modified to utilize any track chain member, track pin retaining device, and / or track chain assembly as described herein.

[0107] For any of the embodiments discussed herein, the track chain assembly may include multiple track chain members of similar or identical configuration. It should be understood that at least two additional track chain members may also be provided that have different or dissimilar geometries, such as two master links joined to multiple track chain members of similar or identical configuration, etc.

[0108] It will be apparent to those skilled in the art that various modifications and variations may be made to the embodiments of the apparatus and assembly methods discussed herein without departing from the scope or spirit of the invention. Other embodiments of the present disclosure will be apparent to those skilled in the art in view of the description and implementation of the various embodiments disclosed herein. For example, some apparatus may be constructed and function differently than described herein, and certain steps of any method may be omitted, performed in an order different from that specifically mentioned, or performed simultaneously or in sub-steps in some cases. Furthermore, certain aspects or features of the various embodiments may be varied or modified to produce additional embodiments, and the features and aspects of the various embodiments may supplement or replace other features or aspects of other embodiments in order to provide additional embodiments.

[0109] Accordingly, it is intended that the specification and examples be considered exemplary only, with a true scope and spirit of the invention being indicated by the following claims and their equivalents.

Claims

1. A crawler chain component (500), comprising: a plate member (502) defining a track chain travel direction (T) and a lateral direction (L) perpendicular to the track chain travel direction (T); as well as A track pad member (504) extends from the plate member (502), the track pad member comprising a first lug member (508) extending from the plate member (502) in a first direction (510) parallel to the direction of travel (T) of the crawler chain, a second lug member (512) and a third lug member (514), both of which extend from the plate member (502) in a second direction (516) opposite the first direction (510); in The first lug member (508) and the third lug member (514) define a Z-shaped configuration, and the first lug member (508) defines a first lug member width (W508) along the lateral direction (L), and the track pad member (504) defines a roller bearing surface (518), the roller bearing surface defining a roller bearing surface width (W518) along the lateral direction (L), and the first lug member width (W508) ranges from 40-60% of the roller bearing surface width (W518), and the third lug member (514) includes a first protrusion extending upwardly from the third lug member (514), the first protrusion extending upwardly beyond the bearing surface of the track pad member (504).

2. The track chain member (500) of claim 1, wherein the first lug member (508), the second lug member (512), and the third lug member (514) define a track pin opening (520), and the first protrusion is disposed at a lateral end of the third lug member (514).

3. The crawler chain component (500) of claim 1, wherein the first lug member width (W508) ranges from 96 to 106 mm.

4. The crawler chain member (500) of claim 3, wherein the roller support surface width (W518) ranges from 191 to 211 mm, and the first protrusion is a first peak-shaped member (410).

5. The crawler chain member (500) of claim 1 , wherein the second lug member (512) is spaced apart from the third lug member (514), at least partially defining a gap (522) therebetween, and the first lug member (508) is laterally aligned with the gap (522).

6. The crawler chain member (500) of claim 1 , wherein the second lug member (512) defines a second lug member width (W512) along the lateral direction (L), the third lug member (514) defines a third lug member width (W514) along the lateral direction (L), and the first lug member width (W508) is different from the second lug member width (W512) and the third lug member width (W514).

7. The crawler chain member (500) of claim 6, wherein the first lug member width (W508) is greater than the second lug member width (W512) but less than the third lug member width (W514).

8. The track chain member (500) of claim 5, wherein the track chain member (500) defines a center of mass (C) and a central axis (CA) passing through the center of mass (C), wherein the central axis (CA) is perpendicular to the lateral direction (L) and the track chain travel direction (T), and the track chain member (500) includes a circular array, wherein the first lug member (508), the second lug member (512), and the third lug member (514) are rotated 180 degrees about the central axis (CA) to form a fourth lug member (526), ​​a fifth lug member (528), and a sixth lug member (530), the fourth lug member (526) and the sixth lug member (530) defining another Z-shaped configuration, and the sixth lug member (530) includes a second protrusion extending upwardly from the sixth lug member (530), the second protrusion extending upwardly beyond the bearing surface of the track shoe member.

9. The crawler chain member (500) of claim 8, wherein the crawler chain member (500) further defines a central groove (532) located at a central axis (CA), wherein the central groove (532) extends in a crawler chain travel direction (T), and the second protrusion is a second peak-shaped member (418) disposed at a lateral end of the sixth lug member (530).

10. The track chain member (500) of claim 2, wherein the track pin openings (520) of the first lug member (508), the second lug member (512), and the third lug member (514) have the same diameter.

11. A crawler chain assembly (100), comprising: A plurality of interlocking track chain members (500), wherein each track chain member (500) defines a track chain travel direction (T), a lateral direction (L) perpendicular to the track chain travel direction (T), and includes a plate member (502) defining a plate member width (W502) along the lateral direction (L); as well as A first track shoe member (504) defining a first track shoe maximum width (W504) along the lateral direction (L), and a second track shoe member (504') defining a second track shoe maximum width (W504') along the lateral direction (L), wherein a ratio of the first or second track shoe maximum width to the plate member width (W502) ranges from 1:4 to 3:4, and the first track shoe member (504) and the second track shoe member (504') respectively include a first protrusion provided at one lateral end of the first track shoe member (504) and a second protrusion provided at the other lateral end of the second track shoe member (504'), the first protrusion and the second protrusion respectively extending upward beyond the support surfaces of the track shoe members.

12. The crawler chain assembly (100) of claim 11, wherein the first track pad member (504) is spaced apart from the second track pad member (504') by a predetermined distance along the lateral direction (L).

13. The crawler chain assembly (100) of claim 11, wherein the first protrusion is a first peak-shaped member (410) and the second protrusion is a second peak-shaped member (418).

14. The crawler chain assembly (100) of claim 11, wherein both the first track pad member (504) and the second track pad member (504') comprise a first lug member (508) extending from the plate member (502) in a first direction (510) parallel to the direction of travel (T) of the crawler chain, and a second lug member (512) and a third lug member (514), both of which extend from the plate member (502) in a second direction (516) opposite the first direction (510); The first lug member (508) and the third lug member (514) define a Z-shaped configuration, and the first lug member (508) defines a first lug member width (W508) along the lateral direction (L), and the first lug member width (W508) ranges from 40-60% of a maximum width of the first or second track pad.

15. The crawler chain assembly (100) of claim 14, wherein the first lug member (508), the second lug member (512), and the third lug member (514) define a track pin aperture (520).

16. The crawler chain assembly (100) of claim 15, wherein the first lug member width (W508) ranges from 96 to 106 mm.

17. The crawler chain assembly (100) according to claim 16, wherein the maximum width of any track shoe ranges from 191 to 211 mm.

18. The crawler chain assembly (100) of claim 17, wherein the first lug member (508) is laterally aligned between the second lug member (512) and the third lug member (514).

19. The crawler chain assembly (100) of claim 18, wherein the second lug member (512) defines a second lug member width (W512) along the lateral direction (L), the third lug member (514) defines a third lug member width (W514), and the first lug member width (W508) is different from the second lug member width (W512) and the third lug member width (W514).

20. The crawler chain assembly (100) of claim 19, wherein the first lug member width (W508) is greater than the second lug member width (W512) but less than the third lug member width (W514).

Images