Internal threaded pin and variations thereof

Abstract

Various chain link assemblies and methods thereto are provided, including methods and structures for facilitating disassembly of chains having interference fits between pins and sidebars. Some of these designs and schemes involve internal threading on one or more end of the pin for facilitating disassembly or assembly using additional structures including cups. Other concepts may incorporate cups that can serve as press applying members provide additional travel distance for breaking the interference fits.

Description

INTERNAL THREADED PIN AND VARIATIONS THEREOFCROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to United States Provisional Patent Application No. 63 / 739,175 filed on December 27, 2024, the entire contents of which are incorporated herein by reference.BACKGROUND

[0002] Industrial chains are used in a variety of applications including conveyor and elevator systems for mines, processing plants, agricultural facilities, recycling plants, refineries, foundries, and similar environments. While certain chains may exhibit extended service life compared to others, chains in continual use eventually require repair as components experience wear during operation. Rather than replacing an entire chain, which can be costly, chain links or pins are frequently repaired in the field to return the conveyor system to operation.

[0003] However, repairing chains in the field can be laborious, difficult, cumbersome, and time-consuming. In many instances, the site of repair may be cramped or difficult for repair personnel to access. Tools are often required as part of the repair process and, based on the size of the tools relative to the available working space or the availability of power systems to operate the tools, it can be physically and logistically challenging to execute a repair. Downtime can be costly if a repair cannot be implemented in a timely manner, and accordingly there remains demand for robust and efficient systems for repairing chains.

[0004] Conventional chain assemblies typically rely on interference fits between pins and sidebars to maintain the structural integrity of the chain during operation. While interference fits provide secure engagement between components, they can complicate disassembly procedures when repair or replacement is desired. The force required to overcome an interference fit during disassembly may necessitate specialized extraction tools and can increase the time and effort associated with field repairs. Accordingly, there remains demand for chain assembly configurations that facilitate simplified disassembly while maintaining structural integrity and performance during operation. In particular, there is a need for pin configurations that allow for1QB\ 100044686.1 790063.02530the use of standard tools such as impact drivers to convert rotational force into axial force for releasing pins from interference fits.SUMMARY

[0005] Such earlier chain repair and chain assembly concepts primarily focused on the assembly and / or repair of a chain. However, they did not address how an already-installed pin could be removed from a sidebar. In particular, once locked together by an interference or press fit, a sizable amount of force would then be necessary to remove such a press-fit pin, often requiring specialized extraction tools that may not be readily available in field repair situations. So, while such earlier work focused on assembly and repair, little to no consideration was made as to how to accommodate disassembly of a pin once in place. Accordingly, there could be significant benefits resulting from improved assemblies and methods that take into consideration not only the assembly or repair of the chain, but that also contemplate improved disassembly. Disclosed herein are chain assemblies and related methods that can better accommodate installation, repair, and disassembly by providing threaded pin configurations with cups, end caps, clamps, and removal bolts that convert rotational force into axial force for releasing pins from interference fits. While such structures and methods can be utilized as described herein, it is also contemplated that individualized aspects of these structures and methods could be implemented to improve existing chain structures and repair methods.

[0006] According to one aspect of the disclosure, a chain link assembly includes a first sidebar having a first bore, a second sidebar having a second bore aligned with the first bore, a pin, and a cup. The pin extends through the first bore and the second bore and has a first end and a second end opposite the first end. At least one of the first end or the second end includes a threaded portion (which may in may forms could be internal threads). The cup has an opening configured to receive the threaded portion of the pin. The cup is positionable between a nut and one of the first sidebar or the second sidebar and is configured to act as a spacer such that tightening the nut against the cup generates an axial force on the pin to release the pin from an interference fit with at least one of the first sidebar or the second sidebar. This can be used as part of a disassembly process for the chain link assembly.

[0007] In some forms, the first end of the pin may include a first threaded portion and the second end of the pin may include a second threaded portion. The second threaded portion of the2QB\ 100044686.1 790063.02530pin may have a length sufficient to accommodate both the cup and the nut, and the second threaded portion may have a greater length than the first threaded portion.

[0008] In some forms, the pin may include a body extending between the first end and the second end in which the body has a larger diameter than the threaded portion.

[0009] In some forms, the cup may have a hexagonal body configured for engagement with a tool and an internal cavity sized to receive the nut therein. The chain link assembly may also include an end cap positionable over the threaded portion of the pin and receivable in the cup with the end cap being configured to protect the threaded portion during operation.

[0010] In some forms, wherein the cup may include a first side having a first opening and a second side having a second opening. The first opening may have an inner diameter (or more generally, cross sectional area) smaller than the second opening.

[0011] In some forms, the chain link assembly may further include a washer positioned between the nut and the other of the first sidebar or the second sidebar on an opposite end of the pin from the cup.

[0012] In some forms, the threaded portion of the pin may include internal threads formed within a recess at the at least one of the first end or the second end of the pin. A fastener may be configured to threadably engage the internal threads to generate the axial force on the pin.

[0013] In some forms, the chain link assembly may further employ a clamp configured to hook over one of the first sidebar or the second sidebar. The clamp may provide a reaction surface against which the fastener acts to generate an axial pushing force that releases the pin from the interference fit.

[0014] In some forms, the chain link assembly may further include a disassembly cup configured to fit over the fastener and the at least one of the first end or the second end of the pin. The disassembly cup may bear against one of the first sidebar or the second sidebar and may provide a reaction surface such that tightening the fastener generates an axial pulling force that releases the pin from the interference fit.

[0015] According to another aspect, a method of disassembling a chain link assembly having a first sidebar, a second sidebar, and a pin extending through the first sidebar and the second sidebar in an interference fit. The method includes positioning a cup over a threaded portion of the pin in which the cup has a central opening through which the threaded portion of the pin extends. The method further includes engaging a nut with the threaded portion of the pin and3QB\ 100044686.1 790063.02530tightening the nut against the cup to generate an axial force on the pin. The cup bears against one of the first sidebar or the second sidebar and the axial force releases the pin from the interference fit with at least one of the first sidebar or the second sidebar.

[0016] In some forms of the method, the pin may include a first threaded portion at a first end and a second threaded portion at a second end opposite the first end. Positioning the cup may include positioning the cup over the second threaded portion. In some forms, the second threaded portion may have a length sufficient to accommodate both the cup and the nut.

[0017] In some forms of the method, tightening the nut against the cup may include using an impact driver to rotate the nut.

[0018] In some forms of the method, the method may further include removing an end cap from the threaded portion of the pin prior to positioning the cup over the threaded portion in which the end cap protects the threaded portion during operation of the chain link assembly.

[0019] According to yet another aspect, a chain link assembly is provided. The chain link assembly includes a first sidebar having a first bore and a tab extending from the first sidebar in which the tab defines a hole, a second sidebar having a second bore aligned with the first bore, a pin extending through the first bore and the second bore in an interference fit with at least one of the first sidebar or the second sidebar, and a removal bolt configured to be received within the hole in the tab. The rotation of the removal bolt generates an axial force that presses against the second sidebar to release the pin from the interference fit. It is contemplated that the openings receiving the removal bolts need not necessarily be on tabs and the sidebar could simply be of dimension that would accommodate the openings (likely threaded) to be arranged on the sidebar.

[0020] In some forms, the hole in the tab may be threaded to engage with the removal bolt.

[0021] In some forms, the first sidebar may be separated from the second sidebar responsive to the axial force generated by rotation of the removal bolt, thereby releasing the pin from the interference fit with the first sidebar and the second sidebar.

[0022] In some form, the chain assembly may include a tightening nut positioned on a threaded portion of the pin. The tightening nut may be configured to be loosened prior to rotation of the removal bolt to permit displacement of the pin from the first sidebar and the second sidebar.

[0023] The foregoing and other aspects and advantages of the present disclosure will appear from the following description. In the description, reference is made to the accompanying4QB\ 100044686.1 790063.02530drawings that form a part hereof, and in which there is shown by way of illustration one or more exemplary versions. These versions do not necessarily represent the full scope of the disclosure.BRIEF DESCRIPTION OF FIGURES

[0024] The following drawings are provided to help illustrate various features of non-limiting examples of the disclosure and are not intended to limit the scope of the disclosure or exclude alternative implementations.

[0025] FIG. 1 is a top, front, and left isometric view of a chain assembly according to a first embodiment.

[0026] FIG. 2 is a top, back, and left isometric view of the chain assembly of FIG. 1.

[0027] FIG. 3 is a top, front, and left isometric view of inner links that are to be assembled in the chain assembly of FIG. 1.

[0028] FIG. 4 is a top, front, and left isometric view of sidebars of an outer link that are to be assembled in the chain assembly of FIG. 1, without depicting the pins or inner chain links.

[0029] FIG. 5 is a front view of a double end threaded pin for use in a chain assembly of the type shown in FIG. 1.

[0030] FIG. 6 is an axonometric view of a cup for use in a chain assembly of the type shown in FIG. 1.

[0031] FIG. 7 is a detailed side view of the pin of FIG. 5 in a disassembly configuration illustrating the further use of a cup.

[0032] FIG. 8 is a top view of the chain assembly with the pin of FIG. 5 in the installed configuration (albeit with the inner links not present).

[0033] FIG. 9 is a top view of another example of the chain assembly of FIG. 8 with the nut being advanced to release the pin from the press fit.

[0034] FIG. 10 is an axonometric view of the chain assembly of FIG. 1 with a cup and an end cap installed on a pin.

[0035] FIG. 11A is a side view of the pin of FIG. 10 in a disassembly configuration.

[0036] FIG. 1 IB is a side view of the pin of FIG. 10 in an assembled configuration.

[0037] FIG. 12A is a front, left, axonometric view of the cup of FIG. 10 for transferring force.

[0038] FIG. 12B is a rear, left, axonometric view of the cup of FIG. 10.5QB\ 100044686.1 790063.02530

[0039] FIG. 13A is a rear, left, axonometric view of the end cap of FIG. 10 for acting as a thread cover.

[0040] FIG. 13B is a front, left, axonometric view of the end cap of FIG. 10.

[0041] FIG. 14 is a cross-sectional view of an internally threaded pin for use in the chain assembly of FIG. 1 according to another embodiment.

[0042] FIG. 15 is a cross-sectional view of the pin of FIG. 14 with a washer for facilitating disassembly.

[0043] FIG. 16 is a cross-sectional view of the pin of FIG. 14 according to another example including a cup (instead of a washer) for facilitating disassembly.

[0044] FIG. 17 is a cross-sectional view of a pin having two internally threaded sides for use in the chain assembly of FIG. 1.

[0045] FIGS. 18A-18D is an example method of assembly of the pin of FIG. 17.

[0046] FIGS. 19A-19D is an example method of disassembly of the pin of FIG. 17 according to a first variation.

[0047] FIGS. 20A-20D is another example method of disassembly of the pin of FIG. 17 according to a second variation.

[0048] FIGS. 21A-21D are example fastener variations for use in the pin of FIG. 17 contemplating the differences in fastener length.

[0049] FIG. 22 is a cross-sectional view of an example pin for use in the chain assembly of FIG. 1 with an assembly cup and a disassembly cup.

[0050] FIG. 23 is a detailed view illustrating the use of the disassembly cup of FIG. 22.

[0051] FIG. 24 is a top view of the chain assembly of FIG. 1 with removal bolts and tightening nuts according to yet another embodiment.

[0052] FIG. 25 is a front, left, axonometric view of the chain assembly of FIG. 24.DETAILED DESCRIPTION

[0053] Some embodiments of this disclosure provide solutions to these issues by providing improved systems and methods for assembling, repairing, and disassembling chains. For example, some embodiments may provide a chain assembly that includes a pin extending through bushings and outer sidebars, where the pin has a threaded configuration on one or both ends to facilitate assembly and disassembly operations. Cups, end caps, and clamps may be positioned on the6QB\ 100044686.1 790063.02530threaded portions of the pin to provide reaction surfaces and spacer functionality during disassembly. When disassembly is desired, a nut may be tightened against a cup to convert rotational force into axial force, thereby releasing the pin from an interference fit with the sidebars without requiring specialized extraction tools. Some embodiments can provide internally threaded pins having recesses at one or both ends, where fasteners threadably engage the internal threads to generate axial pulling or pushing forces on the pin. Other embodiments may provide a clamp that hooks over a sidebar to provide a reaction surface against which a fastener acts to generate an axial pushing force that releases the pin from the interference fit. Still other embodiments can provide removal bolts that extend through holes in tabs on the sidebars, where rotation of the removal bolts generates a separation force that presses the sidebars apart and releases the pins from their interference fits. Because the threaded configurations allow standard tools such as impact drivers to be used for converting rotational force into axial force, the pins may be removed without requiring the specialized extraction tools that would otherwise be necessary to overcome an interference fit, reducing the time and effort associated with field repairs.

[0054] FIG. 1 and FIG. 2 show an isometric view of a chain assembly 100 that has inner links 102, 104, which are coupled together by outer sidebars 174, 176, as part of an outer link which includes outer link parts 170, 172 to form the chain assembly 100. As shown in FIG. 1, the inner link 102 includes inner sidebars 106, 108 separated from each other. The inner sidebars 106, 108 are coupled together by bushings 110, 112 to form the inner link 102. Although the inner sidebars 106, 108 are illustrated as being planar and rectangular with rounded edges, the inner sidebars 106, 108 can be implemented to have different shapes or geometries.

[0055] Referring to FIG. 3, which shows the inner links 102, 104 apart from the outer sidebars, each inner sidebar 106, 108 has openings that can at least partially define a respective bore. For example, the inner sidebar 106 has openings 120, 122, 124 that are directed entirely through the inner sidebar 106, and the inner sidebar 108 has openings 126, 128, 130 that are directed entirely through the inner sidebar 108. Although the inner sidebars 106, 108 are illustrated as having three openings, the inner sidebars 106, 108 can include any number of openings. In some examples, the openings of the inner sidebars 106, 108 can provide a coupling location for the bushings 110, 112. For example, the bushing 110 can be coupled to the inner sidebars 106, 108 by inserting a first end of the bushing 110 through the opening 120 of the inner sidebar 106 and by inserting a second end of the bushing 110 through the opening 126 of the inner sidebar 108. As such, the7QB\ 100044686.1 790063.02530bushing 110 is coupled to the inner sidebars 106, 108 at the openings 120, 126 (e.g., by an interference fit). Similarly, the bushing 112 can be inserted through a different one of the openings of the inner sidebars 106, 108. For example, as illustrated, the bushing 112 is inserted through the opening 124 of the inner sidebar 106 and through the opening 130 of the inner sidebar 108 to couple the bushing 112 to the inner sidebars 106, 108.

[0056] As shown in FIG. 1 through FIG. 3, the bushings 110, 112 define bores 114, 116, which can each provide an access channel through and between the inner sidebars 106, 108. As such, each bore 114, 116 is configured to receive a pin, such as from an adjacent link and / or sidebars, or a portion thereof, to support the formation or repair of a chain. In some examples, such as illustrated in FIG. 1, the bushings 110, 112 can each entirely define their respective bore 114, 116, with the bores 114, 116 being coaxially positioned relative to the openings of the plates 106, 108. For example, the bore 114 is coaxially positioned relative to the openings 120, 126, and the bore 116 is coaxially positioned relative to the openings 124, 130. In other examples, bores of other links or sidebars can be defined by their openings of their sidebars.

[0057] In some examples, the bushings 110, 112 can include respective rollers coaxially received around the bushings 110, 112. In other examples, the bushings 110, 112 can be bushed rollers (such as steel bushed rollers). Regardless of the particular implementation, an interior surface of each bushing 110, 112 can provide a bearing surface that is configured to receive a pin through one of the bushings 110, 112 to easily roll over its interior surface. In some examples, the interior surface may be lubricated, however, in alternative configurations, the interior surface of the bushings 110, 112 may not be lubricated.

[0058] With additional reference being made to FIG. 3, the inner link 104 is structured in a similar manner as the inner link 102, and thus, includes similar features as the inner link 102. For example, the inner link 104 also includes inner sidebars 136, 138, bushings 140, 142, and bores 144, 146. The bushings 140, 142 are each coupled to both inner sidebars 136, 138, and each inner sidebar 136, 138 also includes openings directed entirely therethrough. For example, the inner sidebar 136 includes openings 150, 152, 154, while the inner sidebar 138 includes openings 156, 158, 160. Similarly to the inner link 102, the bushing 140 is inserted through the openings 150, 156 to couple the bushing 140 to the inner sidebars 136, 138 at these openings 150, 156, while the bushing 142 is inserted through the openings 154, 160 to couple the bushing 142 to the inner sidebars 136, 138 at openings holes 154, 160. As also similar to the inner link 102, each of the8QB\ 100044686.1 790063.02530bushings 140, 142 can have an interior surface that can define a bearing surface that can allow a surface of a pin to roll along.

[0059] Although the chain assembly 100 is illustrated in FIG. 1 and FIG. 2 as only having inner links 102, 104, it is to be appreciated that the chain assembly 100 has other links that are coupled to and extend from the inner links 102, 104 in both directions in addition to the outer link centrally connecting the two. In other words, while the inner links 102, 104 each have only a single link as illustrated, the chain links 102, 104 can have other numbers of links such as, for example, a series of chain links so as to form a longer chain that, in most instances, will loop onto itself.

[0060] Referring now to FIG. 1 through FIG. 4 collectively, the chain assembly 100 also includes the outer link parts 170, 172 as part of the outer link, which are coupled to the inner links 102, 104 and can be implemented in a similar way as the inner links 102, 104. For example, and as illustrated, the outer links parts 170, 172 can collectively define aligned bores. In particular, the outer link 170 has bores 182, 184 and the outer link 172 has bores 186, 188, where the bores 182, 186 can collectively define a set of aligned bores and where the bores 184, 188 can collectively define another set of aligned bores. The bores 186, 188 can be substantially larger than the bores 182, 184 so that, for example, a pin inserted through the set of aligned bores can fit through the bores 186, 188 with relative ease, while forming an interference fit with the bores 182, 184. In some examples, the outer link parts 170, 172 can be structured similarly to each other (e g., both having the same shape, such as being rectangular with rounded edges). In other examples, the outer link parts 170, 172 can be structured differently. In some examples, the outer link parts 170, 172 can be structured similarly to the inner links 102, 104, while in other cases, each of the outer link parts 170, 172 can be structured in a different manner as the inner links 102, 104. For example, the outer link part 170 can have a flange 190 that extends away from an outer sidebar 174 of the outer link part 170, which includes the bores 182, 184. Similarly, the outer link part 172 can have a flange 192 that extends away from an outer sidebar 176 of the outer link part 172, which includes the bores 186, 188. In some examples, the flanges 190, 192 can extend away from each other in opposing directions, and each flange 190, 192 can include one or more openings directed therethrough for providing a coupling location (for example, a fastening location) for components to be coupled to the chain assembly 100. For example, each flange 190, 192 can include one or more openings that can facilitate the attachment of conveyor components (such as9QB\ 100044686.1 790063.02530buckets, trays, and so forth) by inserting fasteners (such as, for example, bolts) of the conveyor component through the one or more respective holes to couple the conveyor component to the chain assembly 100. Although FIG. 2 illustrates that the flanges 190, 192 extend from the respective outer sidebars 174, 176 at an angle that is substantially (that is, deviating by less than 10 percent from) 90 degrees, in other examples, the flanges 190, 192 can be angled relative to the respective outer sidebar 174, 176 at a different angle.

[0061] It is perhaps to be repeated here that the exact arrangement depicted in FIGS. 1 through 4 is made now for a general understanding of a chain assembly. In many of the embodiments that follow, the pin will be modified from that depicted in FIGS. 1 through 4 so as to, for example, contain threading or structures on both ends in order to help facilitate both assembly and disassembly. So while a “head” and “thread” ends are generally depicted in FIGS. 1 though 4 that head and thread end may in fact be replaced by structures as will be described below.

[0062] In some examples, each of the set of aligned bores are configured to receive a pin. For example, a pin or pins can be first inserted through the bores 186, 188 of the outer sidebar 176 until a head end 204 of each pin 200 that has a larger cross-section than the bore 186 contacts the outer sidebar 176. These pins and first outer sidebar may be pre-fit together as a subassembly. As described in more detail below, with the pins 200 inserted through the outer sidebar 176, each pin 200 can be further inserted through the inner links 102, 104. For example, the pin 200 is configured to extend entirely through the bore 116 of the inner link 102 and is configured to then extend through the bore 182 of the opposing outer sidebar 174 (that is, a portion of a threaded end 206 of the pin 200 that is opposite the head end 204 of the pin 200 being inserted through the bore 182).

[0063] With the pin 200 extended through the outer sidebar 176, the inner links 102, 104, and the other outer sidebar 174, a nut 208 can be engaged with the pin 200. As the nut 208 is tightened and advanced along the threaded end 206 of the pin 200 towards the head end 204 of the pin 200, the nut 208 forces the pin 200 through the bore 182 of the outer sidebar 174 to create an interference fit between the pin 200 and the outer sidebar 174 at the bore 182.

[0064] In some embodiments, such as in the one depicted in FIGS. 1 through 4, as the nut 208 is further tightened, which can include after an interference fit has been created (which may be unbeknownst to the operator tightening the nut 208), a washer 210 can contact the pin 200. The washer 210 can block further relative movement between the nut 208 and the pin 200, thereby10QB\ 100044686.1 790063.02530blocking further advancement of the nut 208 along the pin 200 past the washer 210 towards the head end 204 of the pin 200. In this way, the washer 210 can prevent overtightening of the nut 208, which can lead to undesirable locking of the chain joint defined by the inner links 102, 104, the outer link parts 170, 172, and the pin 200 such as from the outer sidebar 174 being forced against the inner sidebars 106, 136, thus preventing rotation of the inner links 102, 104 about the pin 200.

[0065] In some examples, the washer 210 can include a hole that can have a cross-section that is larger than the threaded end 206 of the pin 200 (for example, so that the threaded end 206 can be inserted through the hole of the washer 210), but which is smaller than a body 202 of the pin 200. The washer 210 can block the outer sidebar 174 from moving in a direction towards the head end 204 of the pin 200. In this way, a gap can be maintained between the outer sidebar 174 and the inner sidebar 106 even when the pin 200 contacts the washer 210, which can prevent undesirable locking of the chain links together.

[0066] While the washer 210 has been described as being a discrete component that is separate from the nut 208, in other configurations, the washer 210 can be coupled to the nut 208. In some examples, the nut 208 can be integrally formed with the washer 210. For example, the nut 208 and the washer 210 can be a single monolithic component (that is, formed from a single piece of material).

[0067] Moving on to improvements and variations on that basic concept and construction of a chain assembly, and referring now to FIG. 5, an exemplary pin 200 configured for use in the chain assembly 100 is shown, except that this pin 200 has threading on both ends. The pin 200 includes a first end 220 and a second end 224 positioned opposite the first end 220. In this example, the first end 220 includes a first threaded portion 232, and the second end 224 includes a second threaded portion 236 in which the first threaded portion 232 is axially longer than the second threaded portion236. A body 238 of the pin 200 extends between the first end 220 and the second end 224. In this example, the body 238 has a larger diameter than the first and second threaded portions 232, 236, thereby providing the pin 200 with a stepped diameter configuration.

[0068] The threaded portions 232, 236 on both ends 220, 224 of the pin 200 are configured to engage with corresponding threaded components, such as nuts or cups, during assembly and disassembly operations. In particular, this double-ended threaded configuration allows mechanical components to be threaded onto either end 220, 224 of the pin 200 to assist with pressing the pin11QB\ 100044686.1 790063.02530200 into or out of interference fit connections with sidebars (e.g., inner sidebars 106, 108 and outer sidebars 174, 176) in the chain assembly 100.

[0069] Referring now to FIG. 6, a cup 244 for use with the pin 200 is shown. The cup 244 has a generally cylindrical shape with a central opening 248 extending therethrough. In this example, the central opening 248 is sized to receive the pin 200 or a threaded shaft therethrough. In some aspects, the cup 244 can be configured to be threaded to engage with and / or protect the threaded portions 232, 236 of the pin 200 during operation or use.

[0070] In this example, the cup 244 functions as a spacer element that, when used in conjunction with a nut (e.g., nut 208) and the threaded pin 200, acts as a press mechanism to facilitate the release of the interference-fit pins 200 from the sidebars 106, 108, 174, 176 during disassembly. In particular, the length of the cup 244 is configured to be sufficient to pull the threaded portions 232, 236 through and overcome a press fit between the pin 200 and the sidebars 106, 108, 174, 176 when the nut 208 is tightened against the cup 244. One way to consider this is that the cup 244 length permits a sufficient travel distance of the pin 232 relative to the sidebar 174, such that the pin 244 can be pulled by the cup at least the axial length of the interference fit between the pin 232 and sidebar 174 to overcome the interference fit in that region. Accordingly, the cup 244 could also serve a function similar to a washer by providing a bearing surface for the fastening components and distributing load across the surface of the adjacent outer sidebar 174, 176 during the disassembly operation.

[0071] Turning now to FIG. 7, the pin 200 is shown in an installed configuration within the chain assembly 100. In particular, the nut 208 is positioned adjacent to the cup 244, and the pin 200 extends through the central opening 248 of the cup 244 and through the nut 208 to connect the inner sidebar 106 and the outer sidebar 174. During disassembly, the cup 244 is first positioned over the threaded portion 232 or 236 of the pin 200 such that the cup 244 bears against one of the outer surfaces of the outer sidebars 174, 176. The nut 208 is then tightened against the cup 244 using a tool such as an impact driver. As the nut 208 is advanced along the threaded portion 232 or 236, the threading action generates an axial pulling force on the pin 200 that overcomes the resistance of the press fit and releases the pin 200 from the opposite outer sidebar 174, 176. This configuration facilitates disassembly of the chain assembly 100 by converting rotational force from tightening the nut 208 into axial pulling force on the pin 200. In some cases, the pin 200 may be12QB\ 100044686.1 790063.02530threaded internally on both ends 220, 224, with custom bolt-like inserts used to pull the pin 200 into the sidebars 106, 108, 174, 176 via the threading action.

[0072] It is perhaps to be mentioned here that the particular ability of the cup to be capable of being used in conjunction with the nut to pull the pin relative to the sidebar will be related to the nature of the press fit and the cross-sectional profile of the pin. While the figures do not depict it, the pin can be designed to be slightly large in cross sectional area in the region of the press fit or interference fit between the pin and the outer sidebar. By pulling the pin through the opening (or relatively speaking, pushing the sidebar down the shaft), the idea is that the opening of the sidebar is moved into a region of the pin with a small cross sectional area, thereby overcoming the interference fit. Such an arrangement would be non-effectual in the case that the pin was of exactly uniform circumference over the main body of its shaft, for example.

[0073] Referring to FIG. 8, two pins 200 are shown extending between and connecting the outer sidebars 174, 176 (without the inner links depicted). In particular, the pins 200 pass through the outer sidebars 174, 176, thereby connecting the outer sidebars 174, 176 together. In this example, the nut 208 is positioned on both the first threaded portion 232 at the first end 220 and the second threaded portion 236 at the second end 224 of each pin 200. On the first end 220 of each pin 200, the washer 210 is positioned between the nut 208 and the outer sidebar 174. On the second end 224 of each pin 200, the cup 244 is positioned between the nut 208 and the outer sidebar 176. In this configuration, the second threaded portion 236 on the second end 224 of each pin 200 is configured to have a length that is sufficient to accommodate both the cup 244 and the nut 208, thereby allowing the nut 208 to be threaded onto the second threaded portion 236 and tightened against the cup 244 during disassembly operations. Accordingly, in this example, the second threaded portion 236 may have a greater length than the first threaded portion 232, although other configurations are possible.

[0074] For example, turning now to FIG. 9, the pin 200 is shown during the disassembly action. Here, the nut 208 and washer 210 on the first end 220 of the pin 200 are removed. Then the nut 208 of the second end 224 of the pin 200 is tightened down threaded end 232 to press the cup 224 against the sidebar 176 to effectuate the pulling of that end of the pin 200 through the sidebar 176 to break that interference fit so that the pin 220 can be extracted from the assembly. It is contemplated that, as part of this action, any interference fit (if one exists) between the other sidebar (i.e., sidebar 174) and the other end of the pin 200 could also be broken if the pressing13QB\ 100044686.1 790063.02530force applied by the nut 208 to the cup 244 transmits through the sidebar 176 through the inner links, to the other sidebar 174.

[0075] Referring now to FIG. 10 and with additional forward reference to FIGS. 11A, 1 IB, 12 A, and 12B, another variation of the chain assembly 100 is shown with two pins 200a, 200b secured between the inner sidebars 106, 108 and the outer sidebars 174, 176 showing different assembly / use and disassembly configurations for a set of nuts, cups, and end caps or covers. Notably, in the view of FIG. 10, the leftmost pin is in an assembled / use configuration in which the nut 208 is being stored / positioned inside the cup 250 and covered with an end cap 254, while the rightmost pin is in the disassembled configuration in which further tightening of the nut 208 will effectuate the aforementioned disassembly of the pin 200a from the sidebar 176.

[0076] Turning now to FIG. 11 A which shows a detailed view with the rightmost pin 200a, the pin 200a is shown in a disassembly-ready configuration. For example, the pin 200a extends through the outer sidebar 176 and the inner sidebar 108. In particular, the nut 208 is positioned on the second threaded portion 236 of the pin 200a, and the cup 250 is disposed between the nut 208 and the outer sidebar 176. When the nut 208 is tightened against the cup 250, and as described above, the threading action generates an axial pulling force on the pin 200a that overcomes the interference fit between the pin 200a and the sidebars 106, 108, 174, 176, as similarly discussed above in connection with FIG. 9. In this way, the cup 250 bears and presses against the outer sidebar 174 and provides a reaction surface that allows for the rotational force applied to the nut 208 to be converted into linear displacement of the pin 200a.

[0077] Referring now to FIG. 1 IB, the pin 200b is shown in the assembled / use position and extends through the outer sidebar 176 and the inner sidebar 138. In this configuration, the nut 208 is positioned inside an inner cavity of the cup 250 having a corresponding shape profile to the outer periphery of the nut 208 so that the combined nut 208 and cup 250 can be threaded onto the threaded end of the pin 200b with the nut 208 received inside the cup 250. By virtue of the cup 250 having a shaped outer periphery or profile, that cup 250 can be secured on the threaded end of the pin with the nut inside the cavity of the cup. The cup 250, having a rim that in that arrangement is position between the sidebar and nut, effective can act as a washer in this arrangement. In this arrangement, an end cap 254 can be inserted into the open end of the cup 250 so that the end cap 254 cover / protects the second threaded portion 236 and the nut 208 received therein. In particular,14QB\ 100044686.1 790063.02530the end cap 254 is positioned over the exposed threaded portions of the pin 200 to prevent contamination, debris accumulation, or damage during use.

[0078] Prior to disassembly operations and when a particular end is the assembled / use configuration as in FIG. 11B, the end cap 254 may be removed and the nut 208 and cup 250 removed (i.e., unthreaded) in order to permit that nut 208 and cup 250 to be subsequently reassembled in the disassembly configuration of FIG. 11A.

[0079] In some examples, the nut 208, the cup 250, and the end cap 254 may be provided as auxiliary components forming a disassembly kit that is separate from the chain assembly 100 during operation. The disassembly kit may be applied to the chain assembly 100 when disassembly is desired and subsequently removed after disassembly is complete. The components of the disassembly kit may then be stored until a subsequent disassembly operation is required. This auxiliary configuration reduces weight on the chain assembly 100 during operation while still providing a mechanism for releasing the pin 200 from its interference fit with the sidebars 106, 108, 174, 176 when disassembly is desired.

[0080] Referring to FIGS. 12A and 12B, the cup 250 is shown separate from the two configurations illustrated in FIGS. 10, 11 A, and 1 IB. As detailed in FIGS. 12A and 12B, the cup 250 includes a body 258 having a hexagonal profile that provides multiple flat engagement surfaces for tools during assembly and disassembly operations. In particular, the hexagonal shape of the body 258 may allow for engagement with standard wrenches, sockets, or impact drivers, allowing for an efficient application of rotational torque to the cup 250 during manipulation of the chain assembly 100.

[0081] Referring still to FIGS. 12A and 12B, the cup 250 includes a first side 262 and a second side 266 positioned opposite the first side 262 on axial ends thereof. A first opening 270 is defined on the first side 262, and a second opening 274 is defined on the second side 266. In this example, the first opening 270 has an inner diameter ID that is smaller than the second opening 274. The inner diameter ID of the first opening 270 may corresponds a same inner diameter as the washer 210, which allows the cup 250 to serve a load distribution function similar to the washer 210 when positioned within the chain assembly 100. Because the first opening 270 is configured to be smaller than the second opening 274, the first side 262 acts as a mechanical stop for the nut 208 during assembly, preventing the nut 208 from passing through the cup 250.15QB\ 100044686.1 790063.02530

[0082] An internal thickness IT of the cup 250 extends between the first side 262 and the second side 266. The internal thickness IT is configured to accommodate a sidebar width plus a maximum tolerance, thereby accounting for manufacturing variations in sidebar dimensions while allowing for proper spacer functionality. During disassembly operations, the internal thickness IT provides sufficient length to pull the threaded portions 232, 236 of the pin 200 through and beyond the interference fit between the pin 200 and the sidebars 106, 108, 174, 176, as noted above. When the nut 208 is tightened onto the cup 250 using a tool such as an impact driver, the threading action generates an axial pulling force on the pin 200. The cup 250 bears against the adjacent outer sidebar (e.g., outer sidebar 176 in the example of FIG. 10) and provides a reaction surface that converts the rotational force from tightening the nut 208 into linear displacement of the pin 200, thereby releasing the pin 200 from its interference fit with the sidebars (e.g., inner sidebar 106 and outer sidebar 174) on the opposite side of the chain assembly 100.

[0083] Turning now to FIGS. 13A and 13B, the end cap 254 is shown. The end cap 254 includes a body 282 having a hexagonal profile that allows for engagement an inner lip or ridge of the inner cavity of the cup 250 so that the end cap 254 can be retained as a cover in the cup 250. The end cap 254 includes a closed first side 286 and a second side 290 positioned opposite the first side 286, in which the second side 290 has a flange, lip or tabs for securing the cap 254 in the cup 250. An opening 294 extends partially through the body 282 and is sized to receive the threaded portions 232, 236 of the pin 200. Again, the first side 286 of the end cap 254 is configured to enclose the exposed threaded portions 232, 236 when assembled, thereby preventing contamination from debris, dirt, or other foreign materials that may accumulate during use and maintains the integrity of the threaded portions 232, 236.

[0084] Referring now to FIGS. 14, 15 and 16, another exemplary configuration of the pin 200 for use in the chain assembly 100 is shown, except in this form, an internal threading on the pin 200 is used to provide structure for locating the pin 200 relative to the outer sidebar 174, 176 during assembly, or receiving additional structure of for facilitating disassembly. In this embodiment, the pin 200 includes a recess or internally threaded opening 298 at the first end 220 of the pin that defines internal threads 300. A fastener 304, configured as a bolt-like insert, may threadably engage the internal threads 300 of the pin 200 to act as a “head” during assembly to prevent the pin 200 from passing through the outer sidebar 174, 176 during assembly of the pin 200 and the sidebar 174, 176. A washer (e.g., washer 210) can positioned on external threads 30216QB\ 100044686.1 790063.02530of the fastener 304 between a head 308 of the fastener 304 and the outer sidebar 174 to provide a surface for engagement with the outer surface of the outer sidebar 174, 176. During assembly, the fastener 304 is rotated and advanced into the internal threads 300 of the recess 298. This threading engagement generates an axial pulling force that draws the pin 200 through an aperture (e.g., bore 182) in the outer sidebar 174. This axial force may overcome resistance from the interference fit and seat the pin 200 within the outer sidebar 174, thereby securing the pin 200 relative to the chain assembly 100 during assembly. In this way, the recess 298 is configured with a depth sufficient to accommodate a length of the fastener 304 that provides adequate thread engagement to generate the required pulling force during assembly. Additionally, the depth of the recess 298 may allow for engagement with a disassembly component or a reverse-threading action that pushes the pin 200 free of the outer sidebar 174 during disassembly operations.

[0085] To accommodate initial insertion of the pin 200 into the bore 182 of the outer sidebar 174, the pin 200 may include a chamfered or angled surface at approximately thirty degrees relative to a longitudinal axis LA of the pin 200, although other angles such as approximately 20 degrees or approximately 45 degrees are possible. Correspondingly, the outer sidebar 174 may include a breakout 212 adjacent to the bore 182 that provides clearance or access for the pin 200 during assembly and disassembly operations.

[0086] The internally threaded configuration of the pin 200 provides an alternative to the externally threaded pin designs described above. The internal threads 300 may be positioned at one or both ends 220, 224 of the pin 200, depending on the assembly and disassembly requirements of the chain assembly 100. In some implementations, the fastener 304 may be removed after assembly is complete to reduce weight or to allow access for subsequent disassembly operations. In other implementations, the fastener 304 may remain within the recess 298 during operation, where the fastener 304 may serve as a protective element that prevents debris accumulation within the internal threads 300 and maintains the threads 300 in a clean condition for future disassembly.

[0087] Referring to FIG. 15, an example disassembly process for the pin 200 of FIG. 14 is shown. In this configuration, the pin 200 extends through the outer sidebar 176, and the fastener 304 is disposed within the recess 298 at the second end 224 of the pin 200. The washer 210 is positioned between the head 308 of the fastener 304 and an outer surface of the outer sidebar 176. During disassembly, the washer 210 provides a reaction surface that bears against the outer sidebar 176 while the fastener 304 is rotated in a reverse-threading direction. As the fastener 304 is rotated17QB\ 100044686.1 790063.02530(eg., such as in a clockwise direction), the threaded engagement between the fastener 304 and the internal threads 300 of the recess 298 generates an axial pushing force on the pin 200. This pushing force acts in a first direction indicated by arrow 316, which is opposite to a second direction indicated by arrow 320 in which the outer sidebar 176 is urged by the reaction force from the washer 210. The axial pushing force generated by the reverse-threading action overcomes the resistance of the interference fit between the pin 200 and the outer sidebar 176, thereby displacing the pin 200 through the bore 182 of the outer sidebar 176 and releasing the pin 200 from the assembly 100. In this manner, the internally threaded configuration of the pin 200 allows for disassembly through a pushing action, as opposed to the pulling action described above in connection with the externally threaded pin configurations.

[0088] Referring now to FIG. 16, an alternate configuration to the pin 200 of FIG. 14is shown. In this example, the pin 200 extends through the outer sidebar 176 and the fastener 304 is disposed within the recess 298 of the pin 200 at the second end 224. As further shown, the cup (e.g., cup 240 or 250) is disposed between the head 308 of the fastener 304 and the outer sidebar 176. In this example, the cup 240 is spaced apart a predetermined distance 324 from the outer sidebar 176 to allow for removal of the pin 200 from an interference fit within the outer sidebar 176. In particular, the cup 240 may be engaged with the head 308 of the fastener 304 to apply rotational force that is converted into axial force on the pin 200. In some cases, the cup 240 may be rotated using an impact driver or wrench to generate the force required to overcome the interference fit between the pin 200 and the outer sidebar 176, with the pin 200 being displaced through the outer sidebar 176 and away from the interference fit zone.

[0089] In some cases, the pin 200 may be configured with internal threads 300 on one end (e.g., first 220 or second end 224) while the other end of the pin (e.g., the other of the internally threaded first 220 or second end 224) does not include internal threads 300 for assembly purposes. In some aspects, the other end of the pin 200 that does not include the internal threads 300 may be configured to receive a cotter pin or other retention device that secures the pin 200 within the chain assembly 100 during operation. This alternative configuration may provide the benefits of the internally threaded design for disassembly purposes while maintaining compatibility with existing assembly methods on the non-internally threaded end of the pin 200. In some example, the non-internally threaded end of the pin 200 may include features such as a transverse hole or groove18QB\ 100044686.1 790063.02530that accommodates the cotter pin, which may be inserted after the pin 200 is seated within the sidebars 106, 108, 174, 176 to prevent unintended displacement of the pin 200 during operation.

[0090] Referring now to FIG. 17, the pin 200 of FIG. 16 is shown in an installed configuration with the first end 220 positioned within the outer sidebar 174 and the bushing 112 being received onto the pin 200. In this example, both the first end 220 and the second end 224 include internal threads 300 formed within respective recesses 298. The fastener 304 is disposed within the recess 298 at the first end 220, with the washer 210 being positioned between the head 308 of the fastener 304 and an outer surface of the outer sidebar 174. In this configuration, the threaded engagement between the fastener 304 and the internal threads 300 is configured to generate an axial pulling force that draws the pin 200 into an interference fit with the outer sidebar 174 when the fastener 304 is rotated, as noted above.

[0091] An example assembly method for installing the pin 200 of FIG. 17 into the chain assembly 100 is illustrated in FIGS. 18A-18D. In particular, FIG. 18A depicts the chain assembly 100 in an initial disassembled configuration where the pin 200 and the fastener 304 are spaced apart from the outer sidebar 174. In this initial stage, the washer 210 can be positioned adjacent to an outer surface of the outer sidebar 174 in preparation for receiving the fastener 304. Furthermore, the pin 200 partially extends into the bushing 112, which is configured to provide a bearing surface between the pin 200 and the outer sidebar 174 when the assembly is complete.

[0092] Turning now to FIG. 18B, the fastener 304 extends through an aperture (e.g., bore 182) in the outer sidebar 174 and engages with the washer 210. The pin 200 is further advanced within the bushing 112 and moves in a first direction indicated by arrow 328 towards the fastener 304. As the pin 200 advances, the first end 220 approaches the fastener 304 to initiate threaded engagement between the pin 200 and the fastener 304.

[0093] With reference to FIG. 18C, the pin 200 begins to threadably engage the fastener 304 as the first end 220 passes through the outer sidebar 174. Once the pin 200 threadably engages with the fastener 304, the fastener 304 can be rotated in a first direction indicated by arrow 332 (e g., in a clockwise direction). This rotation generates an axial pulling force that draws the pin 200 in the direction of arrow 328 toward the fastener 304 and through the outer sidebar 174. After sufficient rotation of the fastener 304, as shown in FIG. 18D, the pin 200 reaches the assembled position where the pin 200 is disposed in an interference fit with the outer sidebar 174. In this19QB\ 100044686.1 790063.02530assembled configuration, the interference fit secures the pin 200 within the outer sidebar 174 and resists displacement of the pin 200 during operation of the chain assembly 100, as noted above.

[0094] FIGS. 19A-19D illustrate an example disassembly method for removing the pin 200 of FIG. 17 from the chain assembly 100. FIG. 19A shows an initial assembled state where the pin 200 extends through the outer sidebar 174 and is seated in an interference fit therewith. In this initial state, the washer 210 is positioned on an outer surface of the outer sidebar 174, and a first fastener (e.g., fastener 304) is disposed within the recess 298 at the first end 220 of the pin 200. The bushing 112 is installed onto the pin 200 and surrounds a portion of the pin 200 between the sidebars 174, 176.

[0095] Turning to FIG. 19B, the disassembly process begins by removing the fastener 304 from the pin 200. As shown, the fastener 304 has been moved in a first direction indicated by arrow 336, which disengages the fastener 304 from the recess 298 of the pin 200. With reference now to FIG. 19C, the washer 210 has been removed from the outer surface of the outer sidebar 174. Correspondingly, a cup (e.g., cup 240 or cup 250) has been positioned adjacent to and secured against the outer surface of the outer sidebar 174. A second fastener 340 extends through the cup 240 and is aligned with the recess 298 of the pin 200. As shown, the second fastener 340 has a greater length than the fastener 304, which provides sufficient thread engagement to extend through the cup 240 and generate the axial force required to overcome the interference fit between the pin 200 and the outer sidebar 174.

[0096] Referring now to FIG. 19D, the second fastener 340 is threadably received within the recess 298 of the pin 200 and is rotated in a first direction (e.g., clockwise), as indicated by arrow 344. As the second fastener 340 advances into the recess 298, the threaded engagement generates an axial pulling force on the pin 200. In particular, the cup 240 bears against the outer surface of the outer sidebar 174 and provides a reaction surface that resists movement of the outer sidebar 174 in the direction opposite to the pulling force. This pulling force overcomes the resistance of the interference fit and draws the pin 200 through the outer sidebar 174, thereby separating the pin 200 from the chain assembly 100. In the configuration shown in FIG. 19D, the pin 200 has been substantially withdrawn from the outer sidebar 174 and the bushing 112. In particular, the first end 220 of the pin 200 has been removed from the interference fit with the outer sidebar 174, and the second end 224 of the pin 200 has been correspondingly displaced from the outer sidebar 176 on the opposite side of the chain assembly 100.20QB\ 100044686.1 790063.02530

[0097] Referring to FIGS. 20A-20D, another example disassembly method for removing the pin 200 of FIG. 17 from the chain assembly 100 is shown. FIG. 20A shows an initial assembled state where the pin 200 extends through the bushing 112 and the outer sidebar 174, with the pin 200 being seated in an interference fit with the outer sidebar 174. In this initial state, a first fastener (e g., fastener 304) is disposed within the recess 298 at the first end 220 of the pin 200, and the washer 210 is positioned on the outer surface of the outer sidebar 174 between the head 308 of the fastener 304 and the outer sidebar 174.

[0098] Turning now to FIG. 20B, the disassembly process begins by removing the fastener 304 from the pin 200. As shown, the fastener 304 is disengaged from the recess 298 of the pin 200 and moves in a first direction indicated by arrow 348, which corresponds to an outward direction away from the pin 200.

[0099] With reference now to FIG. 20C, the washer 210 has been removed from the outer surface of the outer sidebar 174, and a threaded clamp 352 has been installed in its place. In particular, the clamp 352 hooks over the outer sidebar 174 and is secured thereto, with the clamp 352 providing a stable reaction surface against the outer sidebar 174 for the subsequent disassembly operation. A second fastener 356 is positioned in alignment with the recess 298 of the pin 200 and partially extends into an opening 360 defined in the clamp 352. In this example, the second fastener 356 has a length that is greater than the length of the first fastener 304, which provides sufficient thread engagement to extend through the clamp 352 and generate the axial force required to overcome the interference fit between the pin 200 and the outer sidebar 174.

[0100] As shown in FIG. 20D, the second fastener 356 is threadably received within the recess 298 of the pin 200. The second fastener 356 is then rotated in a first direction indicated by arrow 362 (e.g., in a clockwise direction). As the second fastener 356 is advanced into the recess 298 through this rotation, the threaded engagement between the second fastener 356 and the pin 200 generates an axial pushing force on the pin 200. In particular, the clamp 352 bears against the outer surface of the outer sidebar 174 and provides a reaction surface that resists movement of the outer sidebar 174 in the direction of the pushing force. This pushing force acts on the pin 200 in a direction opposite to the reaction force exerted by the clamp 352 against the outer sidebar 174. The axial pushing force generated by the threading action of the second fastener 356, in conjunction with the reaction surface provided by the clamp 352, overcomes the resistance of the interference fit between the pin 200 and the outer sidebar 174, thereby displacing and pushing the first end 22021QB\ 100044686.1 790063.02530of the pin 200 through the bore 182 of the outer sidebar 174 and releasing the pin 200 from the chain assembly 100. In this manner, the clamp-based disassembly mechanism converts rotational force applied to the second fastener 356 into axial pushing force on the pin 200.

[0101] FIGS. 21A-21D illustrate various fastener configurations (e.g., fastener 304) that demonstrate different insertion depths relative to a reference boundary defined by dashed line 364. The dashed line 364 represents a spatial boundary between the outer sidebar 174 and the bushing 112, which serves as a reference point for evaluating the extent to which the fastener 304 extends into the assembly 100. In FIG. 21A, the washer 210 is positioned on the outer surface of the outer sidebar 174. The fastener 304 extends through the washer 210 and into the recess 298 of the pin 200, with the fastener 304 extending substantially past the line 364 and into the region between the outer sidebar 174 and the bushing 112. This deep insertion configuration provides maximum thread engagement between the fastener 304 and the pin 200, which can generate a correspondingly greater axial force during assembly or disassembly operations.

[0102] In FIG. 21B, the washer 210 is similarly positioned on the outer surface of the outer sidebar 174. The fastener 304 extends into the recess 298 of the pin 200 and extends slightly past the line 364. This intermediate insertion depth provides moderate thread engagement between the fastener 304 and the pin 200, which may be suitable for applications requiring less axial force than the configuration shown in FIG. 21 A while still maintaining adequate engagement for secure assembly.

[0103] FIG. 21C illustrates a configuration where the washer 210 is positioned on the outer surface of the outer sidebar 174. In this arrangement, the fastener 304 extends into the recess 298 of the pin 200 but does not extend past the line 364. This shallow insertion configuration, where the fastener 304 does not extend past the line 364, provides minimal thread engagement between the fastener 304 and the pin 200. This reduced engagement depth may be suitable for applications where the interference fit between the pin 200 and the outer sidebar 174 requires less axial force to overcome, or where the available length of the threaded portion of the pin 200 is limited.

[0104] As further shown in FIG. 2 ID, a cup (e.g., cup 240 or cup 250) is positioned to engage the outer surface of the outer sidebar 174 in place of the washer 210. The fastener 304 extends through the cup 240 and into the recess 298 of the pin 200, with the fastener 304 not extending past the line 364. In contrast to the configurations shown in FIGS. 21A-21C, the pin 200 in FIG.21D extends past (e.g., out of) the outer sidebar 174, thereby exposing a portion of the pin 20022QB\ 100044686.1 790063.02530beyond the outer surface of the outer sidebar 174 that can be engaged by the cup 240 and the fastener 304. This extended portion of the pin 200 provides additional thread engagement length for the fastener 304, which allows the threading action to generate sufficient axial force to overcome the interference fit between the pin 200 and the sidebars 106, 108, 174, 176 during disassembly operations.

[0105] Turning now to FIG. 22, another example pin (e.g., pin 200) for use in the chain assembly 100 is shown. In particular, fasteners 304 are disposed within recesses 298 at both the first end 220 and the second end 224 of the pin 200, thereby securing the inner sidebars 106, 108 and the outer sidebars 174, 176 to the pin 200. In this example, an assembly washer 370 is positioned on the second end 224 of the pin 200, disposed between the fastener 304 and the outer sidebar 176. The assembly washer 370 is configured to distribute a load from the fastener 304 across a surface of the outer sidebar 176 during assembly operations, which can prevent localized stress concentrations and allows for uniform force distribution when the fastener 304 is tightened to draw the pin 200 into an interference fit with the sidebars 106, 108, 174, 176.

[0106] Conversely, on the first end 220 of the pin 200, a disassembly cup 374 is shown. The disassembly cup 374 is configured to fit over the fastener 304 and the first end 220 of the pin 200. In this way, the disassembly cup 374 functions as a pressing mechanism during the disassembly process, where the cup-shaped configuration of the disassembly cup 374 provides a reaction surface against which the fastener 304 can act to generate axial force on the pin 200. In this example, the disassembly cup 374 may be provided as an auxiliary component that is applied to the fastener 304 when disassembly is desired, rather than remaining attached to the chain assembly 100 during operation. Although FIG. 22 illustrates the assembly washer 370 positioned on the second end 224 and the disassembly cup 374 positioned on the first end 220, the positions of the assembly washer 370 and the disassembly cup 374 may be reversed in other configurations.

[0107] Referring now to FIG. 23, when disassembly is desired, the disassembly cup 374 is positioned over the fastener 304 and bears against the outer sidebar 174, providing a reaction surface for the disassembly operation. In particular, the disassembly cup 374 acts as a spacer having a length sufficient to accommodate the threading action of the fastener 304 while transmitting the resulting axial pulling force to the pin 200. As shown in FIG. 23, arrows 378 indicate a direction of force application during the disassembly process. In particular, when the fastener 304 is tightened using a tool such as an impact driver, the rotational force is converted23QB\ 100044686.1 790063.02530into linear pulling force on the pin 200 through the threaded engagement. This pulling force overcomes the resistance of the interference fit between the pin 200 and the outer sidebars 174, 176, causing the pin 200 to be displaced through the sidebars 106, 108, 174, 176.

[0108] Referring to FIGS. 24 and 25, another example chain assembly 100 is shown incorporating removal bolts 382 for facilitating disassembly operations. The removal bolts 382 are configured to engage the outer sidebars 174, 176 through corresponding bores (e.g., bores 182, 184, 186, 188) defined in the outer sidebars 174, 176. In some implementations, the removal bolts 382 may alternatively or additionally be received within holes 386 defined in tabs 392 that extend from the outer sidebars 174, 176. The tabs 392 may be integrally formed with the outer sidebars 174, 176 as unitary extensions thereof, although other configurations, such as separately formed tabs 392 are possible. The holes 386 may be provided in addition to the bores 182, 184, 186, 188 to accommodate the removal bolts 382 separately from the bores 182, 184, 186, 188. In this configuration, the removal bolts 382 function as jacking bolts that, when torqued through the holes 386, press against an opposing sidebar (e.g., the other of the outer sidebars 174, 176) to generate a separation force. Tightening nuts 398 are positioned to engage with threaded portions 228, 232 of the pins 200 or with the removal bolts 382 to secure the assembly during operation.

[0109] During disassembly, the removal bolts 382 and the tightening nuts 398 cooperate to allow for separation of the outer sidebars 174, 176 from the pins 200. In particular, the removal bolts 382 may be rotated using a tool such as an impact driver or wrench, where the threading action converts rotational force into axial force acting on the outer sidebars 174, 176. This axial force overcomes the resistance of the interference fits between the pins 200 and the outer sidebars 174, 176, thereby causing separation of these components and releasing the pins 200 from their press-fit engagement with the outer sidebars 174, 176.

[0110] In particular, as shown in FIG. 25, when the removal bolts 382 are torqued, the threaded engagement between the removal bolts 382 and the bores 182, 184, 186, 188 or holes 386 in one outer sidebar (e.g., outer sidebar 176) generates a pressing force that acts on the opposite outer sidebar (e.g., outer sidebar 174). This pressing force pushes the opposite outer sidebar 174 away from the pins 200, thereby releasing the interference fits between the pins 200 and the opposite outer sidebar 174.[OHl] In operation, the removal bolts 382 extend through the outer sidebar 176 and may pass through corresponding inner sidebars 108, 138 positioned between the outer sidebars 174, 176. As24QB\ 100044686.1 790063.02530the removal bolts 382 are advanced by rotation through the bores 182, 184, 186, 188 or holes 386, the removal bolts 382 can bear against the opposite outer sidebar 174 and generate a separation force that pushes the outer sidebars 174, 176 apart from one another. This separation releases the pins 200 from their interference fits with one or both of the outer sidebars 174, 176, allowing the pins 200 to be withdrawn from the chain assembly 100.

[0112] Advantageously, the removal bolts 382 provide a mechanism for disassembling the chain assembly 100 from a single side without requiring simultaneous access to both sides of the assembly 100. In particular, the removal bolts 382 may be positioned and torqued from one side of the chain assembly 100, with the threading action generating the axial force necessary to act on the opposite side and release the interference fits. Prior to initiating the disassembly operation, the tightening nuts 398 positioned on the pins 200 may be loosened or removed to permit the pins 200 to be displaced from the outer sidebars 174, 176 when the separation force is applied by the removal bolts 382.

[0113] The present disclosure has described one or more preferred embodiments, and it should be appreciated that many equivalents, alternatives, variations, and modifications, aside from those expressly stated, are possible and within the scope of the invention. For example, it is wholly possible that any of the exemplary embodiments could be utilized on one end only of pin as part of the chain assembly. As mentioned above, the pins could be, for example, press fit into one sidebar and then only the terminal ends of the pin extending away from the sidebar could have the retention elements as disclosed.

[0114] It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limitinG. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings.25QB\ 100044686.1 790063.02530

[0115] As used herein, unless otherwise limited or defined, discussion of particular directions is provided by example only, with regard to particular embodiments or relevant illustrations. For example, discussion of “top,” “front,” or “back” features is generally intended as a description only of the orientation of such features relative to a reference frame of a particular example or illustration. Correspondingly, for example, a “top” feature may sometimes be disposed below a “bottom” feature (and so on), in some arrangements or embodiments. Further, references to particular rotational or other movements (e.g., counterclockwise rotation) is generally intended as a description only of movement relative a reference frame of a particular example of illustration.

[0116] Certain operations of methods according to the disclosure, or of systems executing those methods, may be represented schematically in the figures or otherwise discussed herein. Unless otherwise specified or limited, representation in the figures of particular operations in particular spatial order may not necessarily require those operations to be executed in a particular sequence corresponding to the particular spatial order. Correspondingly, certain operations represented in the figures, or otherwise disclosed herein, can be executed in different orders than are expressly illustrated or described, as appropriate for particular embodiments of the disclosure. Further, in some embodiments, certain operations can be executed in parallel, including by dedicated parallel processing devices, or separate computing devices configured to interoperate as part of a large system.

[0117] In some implementations, devices or systems disclosed herein can be utilized or installed using methods embodying aspects of the disclosure. Correspondingly, description herein of particular features, capabilities, or intended purposes of a device or system is generally intended to inherently include disclosure of a method of using such features for the intended purposes, a method of implementing such capabilities, and a method of installing disclosed (or otherwise known) components to support these purposes or capabilities. Similarly, unless otherwise indicated or limited, discussion herein of any method of manufacturing or using a particular device or system, including installing the device or system, is intended to inherently include disclosure, as embodiments of the disclosure, of the utilized features and implemented capabilities of such device or system.

[0118] As used herein, unless otherwise defined or limited, ordinal numbers are used herein for convenience of reference based generally on the order in which particular components are presented for the relevant part of the disclosure. In this regard, for example, designations such as26QB\ 100044686.1 790063.02530“first,” “second,” etc., generally indicate only the order in which the relevant component is introduced for discussion and generally do not indicate or require a particular spatial arrangement, functional or structural primacy or order.

[0119] As used herein, unless otherwise defined or limited, directional terms are used for convenience of reference for discussion of particular figures or examples. For example, references to downward (or other) directions or top (or other) positions may be used to discuss aspects of a particular example or figure, but do not necessarily require similar orientation or geometry in all installations or configurations.

[0120] This discussion is presented to enable a person skilled in the art to make and use embodiments of the disclosure. Various modifications to the illustrated examples will be readily apparent to those skilled in the art, and the generic principles herein can be applied to other examples and applications without departing from the principles disclosed herein. Thus, embodiments of the disclosure are not intended to be limited to embodiments shown, but are to be accorded the widest scope consistent with the principles and features disclosed herein and the claims below. The following detailed description is to be read with reference to the figures, in which like elements in different figures have like reference numerals. The figures, which are not necessarily to scale, depict selected examples and are not intended to limit the scope of the disclosure. Skilled artisans will recognize the examples provided herein have many useful alternatives and fall within the scope of the disclosure.

[0121] Various features and advantages of the disclosure are set forth in the following claims.27QB\ 100044686.1 790063.02530

Claims

CLAIMSWe claim:

1. A chain link assembly, comprising:a first sidebar having a first bore;a second sidebar having a second bore aligned with the first bore;a pin extending through the first bore and the second bore, the pin having a first end and a second end opposite the first end, wherein at least one of the first end or the second end includes a threaded portion; anda cup having an opening configured to receive the threaded portion of the pin, the cup being positionable between a nut and one of the first sidebar or the second sidebar, wherein the cup is configured to act as a spacer such that tightening the nut against the cup generates an axial force on the pin to release the pin from an interference fit with at least one of the first sidebar or the second sidebar.

2. The chain link assembly of claim 1, wherein the first end of the pin includes a first threaded portion and the second end of the pin includes a second threaded portion.

3. The chain link assembly of claim 2, wherein the second threaded portion of the pin has a length sufficient to accommodate both the cup and the nut, and wherein the second threaded portion has a greater length than the first threaded portion.

4. The chain link assembly of claim 1, wherein the pin includes a body extending between the first end and the second end, the body having a larger diameter than the threaded portion.

5. The chain link assembly of claim 1, wherein the cup has a hexagonal body configured for engagement with a tool and an internal cavity sized to receive the nut therein.28QB\ 100044686.1 790063.025306. The chain link assembly of claim 5, further comprising an end cap positionable over the threaded portion of the pin and receivable in the cup, the end cap configured to protect the threaded portion during operation.

7. The chain link assembly of claim 1, wherein the cup includes:a first side having a first opening; anda second side having a second opening, wherein the first opening has an inner diameter smaller than the second opening.

8. The chain link assembly of claim 1, further comprising a washer positioned between the nut and the other of the first sidebar or the second sidebar on an opposite end of the pin from the cup.

9. The chain link assembly of claim 1, wherein the threaded portion of the pin comprises internal threads formed within a recess at the at least one of the first end or the second end of the pin, and wherein a fastener is configured to threadably engage the internal threads to generate the axial force on the pin.

10. The chain link assembly of claim 1, further comprising a clamp configured to hook over one of the first sidebar or the second sidebar, the clamp providing a reaction surface against which the fastener acts to generate an axial pushing force that releases the pin from the interference fit.

11. The chain link assembly of claim 1, further comprising a disassembly cup configured to fit over the fastener and the at least one of the first end or the second end of the pin, the disassembly cup bearing against one of the first sidebar or the second sidebar and providing a reaction surface such that tightening the fastener generates an axial pulling force that releases the pin from the interference fit.29QB\ 100044686.1 790063.0253012. A method of disassembling a chain link assembly having a first sidebar, a second sidebar, and a pin extending through the first sidebar and the second sidebar in an interference fit, the method comprising:positioning a cup over a threaded portion of the pin, the cup having a central opening through which the threaded portion of the pin extends;engaging a nut with the threaded portion of the pin; andtightening the nut against the cup to generate an axial force on the pin, wherein the cup bears against one of the first sidebar or the second sidebar and the axial force releases the pin from the interference fit with at least one of the first sidebar or the second sidebar.

13. The method of claim 12, wherein the pin includes a first threaded portion at a first end and a second threaded portion at a second end opposite the first end, and wherein positioning the cup comprises positioning the cup over the second threaded portion.

14. The method of claim 13, wherein the second threaded portion has a length sufficient to accommodate both the cup and the nut.

15. The method of claim 12, wherein tightening the nut against the cup comprises using an impact driver to rotate the nut.

16. The method of claim 12, further comprising removing an end cap from the threaded portion of the pin prior to positioning the cup over the threaded portion, wherein the end cap protects the threaded portion during operation of the chain link assembly.

17. A chain link assembly, comprising:a first sidebar having a first bore and a tab extending from the first sidebar, the tab defining a hole;a second sidebar having a second bore aligned with the first bore;a pin extending through the first bore and the second bore in an interference fit with at least one of the first sidebar or the second sidebar; and30QB\ 100044686.1 790063.02530a removal bolt configured to be received within the hole in the tab, wherein rotation of the removal bolt generates an axial force that presses against the second sidebar to release the pin from the interference fit.

18. The chain link assembly of claim 17, wherein the hole in the tab is threaded to engage with the removal bolt.

19. The chain link assembly of claim 17, further comprising separating the first sidebar from the second sidebar responsive to the axial force generated by rotation of the removal bolt, thereby releasing the pin from the interference fit with the first sidebar and the second sidebar.

20. The chain link assembly of claim 17, further comprising a tightening nut positioned on a threaded portion of the pin, wherein the tightening nut is configured to be loosened prior to rotation of the removal bolt to permit displacement of the pin from the first sidebar and the second sidebar.31QB\ 100044686.1 790063.02530

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