Ground engaging track plate having raised relief fixation surface

Abstract

A ground engaging track pad (38) includes a shoe plate (46) having link side fixation surfaces (78, 80) and ground side fixation surfaces (82, 84). The link side fixation surfaces (78, 80) and the ground side fixation surfaces (82, 84) are contoured to be convex with respect to the link facing surfaces (58) and the ground facing surfaces (62), respectively. The fixation surfaces (78, 80, 82, 84) enable a fixture to grip the track pad (38) for support during machining, enabling improvements in maintaining portions of the track pad (38) flat and reducing part-to-part variations.

Description

Technical Field

[0001] This disclosure generally relates to a ground-jointing track plate, and more particularly to a track plate having a fixed surface for holding the track plate during processing by a clamping and securing device. Background Technology

[0002] Ground-jointing track systems are used for a variety of machines in off-highway environments. Typical applications include construction, mining, forestry, landfills, and a variety of other applications. In a typical configuration, multiple track links form a ring chain with attached track plates extending around a rotatable track engagement element coupled to the machine frame. This type of ground-jointing track is typically located on each of the left and right sides of the machine. The tracks can advance in the forward direction to move the machine forward, in the opposite direction to move the machine backward, and rotate at different speeds to turn the machine.

[0003] Off-highway environments where tracked machines are typically used can be quite harsh, including hard base materials, slippery and wet conditions, and diverse and repetitive high-load machine activities where the track system is subjected to various forms of wear. During the service life of ground-engaged tracks, numerous track shoes may experience wear due to contact with the base material, as well as torsional loads, bending loads, and other wear phenomena, which can accelerate material fatigue and sometimes cause failure. Depending on the operating conditions, track shoes typically require periodic replacement. Replacing dozens of track shoes for any given machine can be a labor-intensive and relatively expensive effort. For this reason, track shoes are usually manufactured in large quantities and, where reasonably feasible, as economically as possible. Inconsistencies or deviations in track shoe manufacturing may require unwanted rework or scrap. Differences between installed track shoes can complicate installation, shorten track life, or lead to performance degradation.

[0004] In a track plate manufacturing process, slender pieces of rolled iron or steel are produced and cut into sections to provide a consistent, interchangeable form from which finished track plates can be manufactured. Individual cut sections are typically heat-treated and quenched to increase the hardness, fatigue life, and other properties of the individual track plates. For efficiency and consistency in track plate production, as mentioned above, deviations in shape, size, or other properties are undesirable. U.S. Patent Application Publication No. 2014 / 0332505, granted to Prest, relates to a method of manufacturing track plates. In the strategy proposed by Prest, track plate strips have cross-sectional profiles for multiple track plates. One end of the strip is engaged in a first chuck and a second end is engaged in a second chuck. At least one of holes or notches is cut into the strip using a laser cutter. Summary of the Invention

[0005] In one aspect, the ground-engaging track plate includes a shoe-shaped plate having a first lateral edge, a second lateral edge, a front edge, and a rear edge. The shoe-shaped plate also includes an intermediate plate section having a link-facing surface and a ground-facing surface opposite to the link-facing surface. Bolt holes arranged as front and rear bolt hole groups extend through the intermediate plate section. The shoe-shaped plate also includes link-side fixing surfaces extending around the periphery of bolt holes in one of the front and rear bolt hole groups, and ground-side fixing surfaces extending around the periphery of bolt holes in one of the front and rear bolt hole groups. The link-side fixing surfaces are contour-convex relative to the link-facing surface in both the forward and rearward directions, and the ground-side fixing surfaces are contour-convex relative to the ground-facing surface in both the forward and rearward directions.

[0006] In another embodiment, the ground-engaging track plate includes a shoe-shaped plate having a first lateral edge, a second lateral edge, a front edge, and a rear edge. The shoe-shaped plate also includes a middle plate segment having a link-facing side and a ground-facing side opposite to the link-facing side, an upwardly turned lip transitioning from the middle plate segment to the front edge, and a downwardly turned lip transitioning from the middle plate segment to the rear edge. Track teeth protrude from the ground-facing side. The middle plate segment is shaped to form a raised front fixing surface on each of the link-facing and ground-facing sides, and a raised rear fixing surface on each of the link-facing and ground-facing sides. The front fixing surfaces are located behind the upwardly turned lip and aligned front-to-back with each other, and the rear fixing surfaces are located in front of the track teeth and aligned front-to-back with each other.

[0007] In another aspect, the track joint assembly includes a track chain assembly comprising two parallel chains of track links connected end-to-end. The track plate includes a front fixed surface that is raised on each of the track link-facing side and the ground-contact side, and a rear fixed surface that is raised on each of the track link-facing side and the ground-facing side. The track plate also includes bolt holes arranged as a front bolt hole group extending through the front fixed surface and a rear bolt hole group extending through the rear fixed surface; and bolts that extend through the bolt holes and clamp the track plate to the track link of the two parallel chains of the track link. Attached Figure Description

[0008] Figure 1 This is a side view of a machine according to one embodiment;

[0009] Figure 2 This is a schematic view of a partially disassembled track joint assembly according to one embodiment;

[0010] Figure 3 This is a perspective view of a track plate according to one embodiment;

[0011] Figure 4 This is a cross-sectional side view of a track plate according to one embodiment;

[0012] Figure 5 This is a perspective view of the track plate according to another embodiment; and

[0013] Figure 6 This is a schematic view of the processing stages in the manufacture of track plates according to one embodiment. Detailed Implementation

[0014] refer to Figure 1 A machine 10 according to one embodiment is shown. The machine 10 includes a machine frame 12 and a ground-engaging track system 14 coupled to the machine frame 12. The track system 14 includes a track 16 extending around a rotatable drive sprocket 18, a front idler sprocket 20, a rear idler sprocket 22, and a plurality of track rollers 24. The front idler sprocket 20, the rear idler sprocket 22, and the track rollers 24 can be supported by a track roller frame 26. Figure 3 Those substantially identical ground-engaging tracks and associated components visible in the figure would typically be mounted to the opposite side of the machine frame 12, which is hidden in the figure. Machine 10 is shown as a tracked tractor. In other cases, machine 10 could be a half-track machine, a tracked loader, an excavator, or another type of machine. Track system 14 is shown with drive sprocket 18 in a so-called “high-drive” configuration. In other cases, track system 14 could have an elliptical track configuration with one drive sprocket and one idler pulley. Track 16 includes track chain assembly 28, which comprises two parallel chains of track links joined together end-to-end. Figure 1 In the diagram, the track chain 30 of the track chain assembly 28 is shown having a plurality of track links 32. A plurality of track plates 38 are attached to the track links 36 and are generally bolted together to contact each of the two parallel chains of the track links in the track chain assembly 28. As will become more apparent from the following description, the track plates 38 can be uniquely configured for greater inter-part consistency, flatness of certain features, and ease of manufacture.

[0015] Now also referencing Figure 2The diagram illustrates a track joint assembly 40, which includes a portion of a track chain 30 and a portion of a second parallel track chain 34. The track chain 34 includes a plurality of track links 36. A plurality of track plates 38 (sometimes referred to in the singular hereinafter) are configured to be bolted to track links 32 and 36 in the track chains 30 and 34, respectively. The track chains 30 and 34 are joined together by a plurality of track pins 42. The track pins 42 can be engaged with the track chains 30 and 34 in any suitable manner, such as by interference fit, by positive pin retention, or any other suitable strategy. The track pins 42 may be fitted with bushings or may be exposed. As further discussed herein, the track plates 38 can be bolted to the track links 32 and 36 by a plurality of bolts 86 extending through bolt holes in the respective track plates 34. For example, a nut 88, which can be positioned in a nut seat window in a track link, will engage a bolt 86 passing through a track plate 38 in one of track links 32 or 36.

[0016] Now also referencing Figure 3 The track plate 38 includes a shoe-shaped plate 46 having a first lateral edge 48, a second lateral edge 50, a front edge 52, and a rear edge 54. The shoe-shaped plate 46 also includes an intermediate plate section 56 having a link-facing surface 58 on a link-facing side 60 and a ground-facing surface 62 opposite the link-facing surface 58 on a ground-facing side 64. Bolt holes are arranged in a front bolt hole group 74 and a rear bolt hole group 76. The bolt holes of the front bolt hole group 74 and the rear bolt hole group 76 extend through the intermediate plate section 56. The link-facing surface 58 and the ground-facing surface 62 may be planar, except for the raised or protruding portions discussed further herein. The shoe-shaped plate 46 also includes link-side fixing surfaces 78 and 80, each extending around the periphery of a bolt hole in one of the front bolt hole groups 74 and the rear bolt hole groups 76. The shoe-shaped plate 46 also includes ground-side fixing surfaces 82 and 84, which extend around the bolt holes in one of the front bolt hole groups 74 and the rear bolt hole groups 76. The respective link-side fixing surfaces and ground-side fixing surfaces may be entirely planar and each define a common plane on each respective link-facing side 60 and ground-facing side 64.

[0017] Link-side fixing surfaces 78 and 80 are contoured relative to link-facing surface 58 in both the forward and rearward directions. Ground-side fixing surfaces 82 and 84 are contoured relative to ground-facing surface 62 in both the forward and rearward directions. In other words, link-side fixing surfaces 78 and 80 and ground-side fixing surfaces 82 and 84 have a higher profile relative to portions closer to the front edge 38 and closer to the rear edge 54 of the respective link-facing surface 58 and ground-facing surface 62. The intermediate plate section 56 can therefore also be understood as being shaped to form raised front fixing surfaces 82 and 78 on each of the link-facing side 60 and the ground-facing side 64, and to form raised rear fixing surfaces 84 and 80 on each of the link-facing side 60 and the ground-facing side 62. A front bolt hole assembly 74 may extend through the front fixing surfaces 78 and 82, and a rear bolt hole assembly 76 may extend through the rear fixing surfaces 80 and 84. As further discussed herein, compared to certain conventional strategies, the contours of the shoe-shaped plate 46 on the link-facing side 60 and the ground-facing side 64 provide clamping and positioning of the track plate 38 for processing with a smaller total area that needs to be controlled.

[0018] The track plate 38 can also be configured such that the shoe-shaped plate 46 includes an upwardly turned lip 66 transitioning from the middle plate section 56 to the front edge 52, and a downwardly turned lip 68 transitioning from the middle plate section 56 to the rear edge 54. Track teeth 70 are located on the ground-facing side 64 and project vertically. Front fixing surfaces 78 and 82 can be aligned with each other in the fore-aft direction and are located behind the upwardly turned lip 66. Rear fixing surfaces 80 and 84 can be aligned with each other in the fore-aft direction and are located in front of the track teeth 70. Multiple cutouts 72 are formed in the downwardly turned lip 68 and are as follows: Figure 3The diagram shows the track extending inward from the rear edge 54. The terms front, rear, lateral, vertical, and similar directional indicators are used herein for convenience only and should not be construed as requiring any particular positioning, arrangement, or function of the parts of the track system 14. In the illustrated embodiment, link-side fixing surfaces 78 and 80 can each be understood as being aligned front-to-back with one of the ground-side fixing surfaces 82 and 84. Link-side fixing surfaces 78 and 80, as well as ground-side fixing surfaces 82 and 84, each may comprise two fixing surfaces continuously extending from the first lateral edge 48 to the second lateral edge 50. As described above, link-side fixing surfaces 78 and 80 extend around the bolt holes in one of the front bolt hole groups 74 and the rear bolt hole group 76. In the illustrated embodiment, each bolt hole in the front bolt hole group 74 is surrounded by the link-side fixing surface 82 and the ground-side fixing surface 78, and each bolt hole in the rear bolt hole group 76 is surrounded by the link-side fixing surface 80 and the ground-side fixing surface 84. Also in the illustrated embodiment, bolt holes 74 and 76 are arranged in a trapezoidal pattern. In other embodiments, bolt holes 74 and 76 may be formed in a square pattern, a rectangular pattern, or another pattern.

[0019] It will be noted that the link-facing surface 58 and the ground-facing surface 62 can each be understood as separate segments of the surface separated by corresponding fixed surfaces. The link-facing surface 58 can be understood as originating from / terminating at a downwardly flipped lip 68 and originating from / terminating at an upwardly flipped lip 66, thus extending back-and-forth between the downwardly flipped lip 68 and the upwardly flipped lip 66. The ground-facing surface 62 can be understood as originating from / terminating at a track tooth 70 and originating from / terminating at an upwardly flipped lip 66, thus extending back-and-forth between the track tooth 70 and the upwardly flipped lip 66. In the embodiment, the combined surface area of ​​the link-side fixed surfaces 78 and 80 and the combined surface area of ​​the ground-side fixed surfaces 82 and 84 are smaller than the surface areas of the link-facing surface 58 and the ground-facing surface 62, respectively. A first reducing buoyancy channel 90 may be formed in the back-and-forth direction between the link-side fixed surfaces 78 and 80. A second reducing buoyancy channel 92 may be formed in the back-and-forth direction between the ground-side fixed surfaces 82 and 84.

[0020] Now also referencing Figure 4The figure shows further details of additional features of the track plate 30, including dimensional and proportional attributes. A shoe-shaped plate thickness 94 is defined at locations outside the link-side fixing surfaces 78 and 80 and outside the ground-side fixing surfaces 82 and 84 (e.g., between the front bolt hole group 74 and the rear bolt hole group 76). The protrusion height 96 of each of the link-side fixing surfaces 78 and 80 and the ground-side fixing surfaces 82 and 84 can be 2% to 13% of the shoe-shaped plate thickness 94. In one improvement, the protrusion height 96 is 2.3% to 12.5% ​​of the shoe-shaped plate thickness 94. Approximately [missing information] at locations in front of the front fixing surfaces 78 and 82, behind the rear fixing surfaces 80 and 84, and between the front fixing surfaces 78 and 82 and the rear fixing surfaces 80 and 84. Figure 4 At the locations shown, the thickness 94 of the shoe-shaped plate can also be defined. The full thickness 98 of the shoe-shaped plate 46 can be defined as the vertical thickness at the locations of the aligned front fixing surfaces 78 and 82 or the aligned rear fixing surfaces 80 and 84. The full thickness 98 can be 104% to 138% of the shoe-shaped plate thickness 94. In some cases, the shoe-shaped plate thickness 94 can range from about 8 mm to about 22 mm. The protrusion height 96 can range from about 0.5 mm to about 1.5 mm. "About" means within measurement error or within another tolerance that will typically be specified by a person skilled in the art of chassis technology. The proportions and dimensions set forth herein are merely exemplary but provide practical implementation strategies for track plate construction that adapt to or retain mounting patterns, weight requirements, and achieve improved clamping and control during manufacturing, as further discussed herein.

[0021] Now for reference Figure 5The image shows a ground-engaging track plate 138 according to another embodiment. Track plate 138 has some similarities to track plate 38, but also some differences. Track plate 138 includes a shoe-shaped plate 146 having a front edge 152 and a rear edge 154. The rear track teeth are shown at 170, and the front track teeth are shown at 171. The middle plate section 156 of the shoe-shaped plate 146 includes a link-facing surface 158 on the link-facing side and a ground-facing surface 162 on the ground-facing side. Link-side fixing surfaces 178 and 180, which are similar to and substantially identical to the link-side fixing surfaces of the foregoing embodiments, are also shown as raised surfaces relative to the ground-facing surface 162. Ground-side fixing surfaces 182 and 184 are similarly or substantially identical to those of the foregoing embodiments, raised surfaces relative to the ground-facing surface 162. The dimensions and proportions of track plate 138 (including thickness, relative thickness, convexity height, relative convexity height, and total thickness) may be substantially the same as those discussed in conjunction with the foregoing embodiments. Track plate 138 may be a main shoe member configured to engage with a main track link in a ground-engaging track. A maintenance window 191 extends through the intermediate plate section 156 between the link-facing surface 158 and the ground-facing surface 162. Fixed surfaces 178, 180, 182, and 184 may each extend the full lateral width of track plate 138 but may extend through the maintenance window 191. It should also be understood that the main shoe member as contemplated herein may be a single-track toothed track plate. Furthermore, a multi-track toothed track plate as contemplated herein may not be a main shoe member and may be configured without a maintenance window. The description, discussion, or illustration of any embodiment herein should be understood as referring to any other embodiment by analogy unless otherwise indicated or apparent from the context.

[0022] Industrial applicability

[0023] Now, generally refer to the attached diagram, but also refer to... Figure 6 The image shows track plates 38 in one processing stage within a heat treatment furnace 200, and in another processing stage positioned for water spraying via a sprayer 204. As mentioned above, it is desirable to limit the differences between the parts of the track plates. It has been observed that during the water-quenching process following furnace treatment, the track plates may sometimes undergo deformation in a manner that differs between shoe-shaped parts. To achieve proper installation and performance, it is generally desirable to maintain the bolted connection area as close to perfectly flat as possible. Based on previous strategies employing track plates that are ideally uniformly flat on both sides of the intermediate plate section, it is typically necessary to clamp the fasteners to the entire exposed surface between the front and rear lip portions on the ground-facing side and the chain link-facing side.

[0024] exist Figure 6In the right-hand image, the fixing device 201 is shown being clamped by the fixing device actuator 202 into contact with the fixing surfaces 78, 80, 82, and 84. It can be observed that the surface area of ​​the track plate 38 that actually contacts the fixing device 201 is relatively small compared to the required clamping or contact area without the protrusions provided by the corresponding fixing surfaces. Because the relatively small area needs to be precisely controlled, the relatively small clamping or fixing surface area generally makes it easier to clamp the track plate 38 securely and reliably. Figure 6 An example mass concentration point 210 is also shown. According to the previous strategy, without contours provided on the ground-facing and link-facing sides of the track plate 38, when water-quenched, it is expected that the track plate will at least in some cases curl slightly around the mass concentration point, exhibiting the so-called "Pink Chip" or "Potato Chip" phenomenon. By reducing or eliminating any tendency for the track plate 38 to curl around the mass concentration point 210, higher quality products and less rework between corrected parts are expected.

[0025] This specification is for illustrative purposes only and should not be construed as limiting the scope of this disclosure in any way. Therefore, those skilled in the art will understand that various modifications can be made to the embodiments currently disclosed without departing from the full and reasonable scope and spirit of this disclosure. Other aspects, features, and advantages will become apparent from the accompanying drawings and appended claims. As used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more”. The term “one” or similar language is used when intended to refer to only one item. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Additionally, the phrase “based on” is intended to mean “at least partially based on” unless otherwise expressly stated.

Claims

1. A ground-mounted track pad (38, 138), comprising: The shoe-shaped plate (46, 146) includes a first lateral edge (48), a second lateral edge (50), a front edge (52, 152), a rear edge (54, 154), and a middle plate section (56, 156), the middle plate section having a link-facing surface (58) and a ground-facing surface (62) opposite to the link-facing surface (58). Bolt holes arranged as a front bolt hole group (74) and a rear bolt hole group (76) extend through the intermediate plate section (56, 156). The shoe-shaped plates (46, 146) further include link-side fixing surfaces (78, 80, 178, 180) extending around the bolt holes of one of the front bolt hole groups (74) and the rear bolt hole groups (76), and ground-side fixing surfaces (82, 84, 182, 184) extending around the bolt holes of one of the front bolt hole groups (74) and the rear bolt hole groups (76); and The link-side fixing surfaces (78, 80, 178, 180) protrude in profile relative to the link-facing surface (58) in both the forward and backward directions, and the ground-side fixing surfaces (82, 84, 182, 184) protrude in profile relative to the ground-facing surface (62) in both the forward and backward directions.

2. The track plates (38, 138) according to claim 1, wherein: The shoe-shaped plate (46, 146) includes an upwardly flipped lip (66) that transitions from the middle plate section (56, 156) to the front edge (52, 152), a downwardly flipped lip (68) that transitions from the middle plate section (56, 156) to the rear edge (54, 154), and track teeth (70). The link-side fixing surfaces (78, 80, 178, 180) and the ground-side fixing surfaces (82, 84, 182, 184) each include two fixing surfaces that extend continuously from the first lateral edge (48) to the second lateral edge (50); The thickness of the shoe-shaped plate is defined by the intermediate plate section (56, 156) outside the link-side fixing surfaces (78, 80, 178, 180) and the ground-side fixing surfaces (82, 84, 182, 184); The raised relief height of each of the link-side fixing surfaces (78, 80, 178, 180) and the ground-side fixing surfaces (82, 84, 182, 184) is 2% to 13% of the thickness (94) of the shoe-shaped plate.

3. The track plates (38, 138) according to claim 2, wherein: The link-facing surface (58) extends between the downward-flipped lip (68) and the upward-flipped lip (66), and the ground-facing surface (62) extends between the track teeth (70) and the upward-flipped lip (66). The combined surface area of ​​the link-side fixed surfaces (78, 80, 178, 180) and the combined surface area of ​​the ground-side fixed surfaces (82, 84, 182, 184) are smaller than the surface areas of the link-facing surface (58) and the ground-facing surface (62), respectively. Each of the link-side fixing surfaces (78, 80, 178, 180) is aligned with one of the ground-side fixing surfaces (82, 84, 182, 184); and A first reducing buoyancy channel (90) is formed between the link-side fixed surfaces (78, 80, 178, 180) and a second reducing buoyancy channel (92) is formed between the ground-side fixed surfaces (82, 84, 182, 184).

4. A ground-mounted track pad (38, 138), comprising: A shoe-shaped plate (46, 146) includes a first lateral edge (48); a second lateral edge (50); a front edge (52, 152); a rear edge (54, 154); a mid-plate segment (56, 156) having a link-facing side (60, 158) and a ground-facing side (64, 162) opposite to the link-facing side (60, 158); an upwardly flipped lip (66) transitioning from the mid-plate segment (56, 156) to the front edge (52, 152); and a downwardly flipped lip (68) transitioning from the mid-plate segment (56, 156) to the rear edge (54, 154). Track teeth (70), the track teeth protruding from the ground-facing side (64, 162); The intermediate plate sections (56, 156) are shaped to form raised front fixing surfaces (78, 82, 178, 182) on each of the link-facing sides (60, 158) and the ground-facing sides (64, 162), and raised rear fixing surfaces (80, 180, 84, 184) on each of the link-facing sides (60, 158) and the ground-facing sides (64, 162); and The front fixing surfaces (78, 82, 178, 182) are aligned front to back and located behind the upwardly flipped lip (66), and the rear fixing surfaces (80, 180, 84, 184) are aligned front to back and located in front of the track teeth (70).

5. The track plates (38, 138) according to claim 4, wherein: Each of the front fixing surfaces (78, 82, 178, 182) and the rear fixing surfaces (80, 180, 84, 184) extends continuously from the first lateral edge (48) to the second lateral edge (50); and The shoe-shaped plate (46, 146) defines the thickness of the shoe-shaped plate of the intermediate plate section (56, 156) outside the front fixing surface (78, 82, 178, 182) and the rear fixing surface (80, 84, 180, 184), and the protrusion height of each of the front fixing surface (78, 82, 178, 182) and the rear fixing surface (80, 84, 180, 184) is 2% to 13% of the thickness (94) of the shoe-shaped plate.

6. The track plate (38, 138) according to claim 4 or 5, comprising a total of two front fixed surfaces (78, 82, 178, 182) and a total of two rear fixed surfaces (80, 180, 84, 184).

7. The track plate (38, 138) according to claim 4 or 5 further includes bolt holes arranged as a front bolt hole group (74) extending through the front fixed surfaces (78, 82, 178, 182) and a rear bolt hole group (76) extending through the rear fixed surfaces (80, 84, 180, 184).

8. A track joint assembly (40), comprising: Track chain assembly (28), the track chain assembly comprising two parallel chains (30, 34) of track links (32, 36) connected together end to end. Track plates (38, 138) having a link-facing side (60, 158) that contacts the track links (32, 36) in the track chain assembly (28), and a ground-contact side (64, 162), a front fixed surface (78, 82, 178, 182) raised on each of the link-facing side (60, 158) and the ground-contact side (64, 162), and a rear fixed surface (80, 84, 180, 184) raised on each of the link-facing side (60, 158) and the ground-contact side (64, 162). The track plates (38, 138) also include bolt holes arranged as a front bolt hole group (74) extending through the front fixed surfaces (78, 82, 178, 182) and a rear bolt hole group (76) extending through the rear fixed surfaces (80, 84, 180, 184); and Bolt (86) extending through the bolt hole and clamping the track plate (38, 138) into the two parallel chains of the track link (32, 36).

9. The track joint assembly (40) according to claim 8, wherein: The front fixed surfaces (78, 82, 178, 182) and the rear fixed surfaces (80, 84, 180, 184) each include a total of two fixed surfaces, each fixed surface extending continuously from the first lateral edge (48) of the track plate (38, 138) to the second lateral edge (50).

10. The track joint assembly (40) of claim 9, wherein, The track pad (38, 138) further includes a shoe plate (46, 146) defining a shoe plate thickness of the intermediate pad section (56, 156) outside of the front fixation surface (78, 82, 178, 182) and the rear fixation surface (80, 84, 180, 184), and a raised relief height of each of the front fixation surface (78, 82, 178, 182) and the rear fixation surface (80, 84, 180, 184) is 2% to 13% of the shoe plate thickness.

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