Frame assembly for track system, track system having same and method for assembling at least part of a track system

Abstract

A frame assembly, which is for a track system, includes a support assembly, an undercarriage assembly and a pivot assembly. The support assembly includes a first support member configured to connect to a vehicle, and a second support member connected to the first support member. The undercarriage assembly is pivotally connected to the support assembly via the pivot assembly, which includes a first pivot connected to the first support member, and a second pivot connected to the second support member. The first and second pivots are laterally spaced from, and aligned to, each other and define a pivot axis. The first pivot is configured to be disposed on a first lateral side of a drive wheel assembly and the second pivot is configured to be disposed on a second lateral side of the drive wheel assembly. A method for assembling at least part of a track system is also disclosed.

Description

FRAME ASSEMBLY FOR TRACK SYSTEM, TRACK SYSTEM HAVING SAME AND METHOD FOR ASSEMBLING AT LEAST PART OF ATRACK SYSTEMCROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims priority to United States Provisional Patent Application No. 63 / 598,667, filed November 14, 2023, which is incorporated by reference herein in its entirety.TECHNICAL FIELD

[0002] The present technology relates to track systems. More precisely, the present technology relates to frame assemblies for track systems, track systems having frame assemblies, and methods for assembling at least part of track systems.BACKGROUND

[0003] Track systems are often connected to a variety of vehicles such as tractors for the advantages they provide over wheels.

[0004] Conventionally, assembling track systems and / or connecting track systems to vehicles can be time-consuming and difficult to implement on a large scale (e.g., on an assembly line). As a result, some wheeled vehicles are often retrofitted with track systems as opposed to being manufactured as tracked vehicles.

[0005] Additionally, connecting track systems to vehicles can be difficult due to the frame assemblies of the track systems being large, and due to the frame assemblies requiring careful connection for appropriate orientation relative to the vehicle.

[0006] Therefore, there is a desire for a track system that can mitigate the abovementioned issues.SUMMARY

[0007] According to an aspect of the present technology, there is provided a frame assembly for a track system. The frame assembly includes a support assembly, an undercarriage assembly and a pivot assembly. The support assembly includes a first support member configured to connect to a vehicle, and a second support member connected to the first support member. The undercarriage assembly is pivotally connected to the support assembly via the pivot assembly. The pivot assembly including a first pivot connected to the first support member and a second pivot connected to the second support member, the first and second pivots being laterally spaced from and aligned to each other and defining a pivot axis, the first pivot being configured to be disposed on a first lateral side of a drive wheel assembly of the track system and the second pivot being configured to be disposed on a second lateral side of the drive wheel assembly.

[0008] In some embodiments, the frame assembly further includes a plurality of connectors connecting the first support member to the second support member, the plurality of connectors extending generally parallel to the pivot axis.

[0009] In some embodiments, the first support member is selectively connected to the second support member.

[0010] In some embodiments, the first support member is configured to connect to a frame of the vehicle.

[0011] In some embodiments, the first support member is a yoke member.

[0012] In some embodiments, the first support member is an interface member.

[0013] In some embodiments, the drive wheel assembly defines a drive wheel axis, and the pivot axis is longitudinally aligned with the drive wheel axis.

[0014] In some embodiments, the drive wheel assembly defines a drive wheel axis, and the pivot axis is vertically lower than the drive wheel axis.

[0015] In some embodiments, the first pivot is selectively connected to the first support member, and the second pivot is selectively connected to the second support member.

[0016] In some embodiments, the pivot assembly further includes first and second seals.

[0017] The first seal includes a first inner race generally rotationally fixed relative to the first support member, a first outer race generally rotationally fixed relative to the first pivot, and a first resilient portion connecting the first inner race with the first outer race. The second seal includes a second inner race generally rotationally fixed relative to the second support member, a second outer race generally rotationally fixed relative to the second pivot, and a second resilient portion connecting the second inner race with the second outer race. In response to the first inner race rotating relative to the first outer race, the first resilient portion undergoes torsional deformation. In response to the second inner race rotating relative to the second outer race, the second resilient portion undergoes torsional deformation .

[0018] In some embodiments, the first inner race is rotatable relative to the first outer race about the pivot axis by about 15 degrees, and the second inner race is rotatable relative to the second outer race about the pivot axis by about 15 degrees.

[0019] In some embodiments, the first pivot is selectively connected to the first support member, and the second pivot is selectively connected to the second support member.

[0020] In some embodiments, the undercarriage assembly includes a first undercarriage member and a second undercarriage member, the first undercarriage member being pivotally connected to the support assembly, and the second undercarriage member being configured to carry at least one wheel assembly.

[0021] According to an other aspect of the present technology, there is provided a track system including the frame assembly according to the above aspect or according to the above aspect and one or more of the above embodiments, a drive wheel assemblyoperatively connected to the frame assembly, at least one wheel assembly connected to the frame assembly and an endless track that surrounds the frame assembly, the drive wheel assembly, and the at least one wheel assembly.

[0022] In some embodiments, the drive wheel assembly defines a recessed portion configured to receive the second support member therein.

[0023] In some embodiments, the recessed portion is configured to enable connection of the second support member to the first support member.

[0024] In some embodiments, the track system is a rear track system.

[0025] In some embodiments, the track system is a front track system.

[0026] According to another aspect of the present technology, there is provided a vehicle including a frame, a motor supported by the frame, and at least two track systems according to the above aspect or according to the above aspect and one or more of the above embodiments, the at least two track systems being operatively connected to the motor.

[0027] In some embodiments, the vehicle is configured to provide a steering axis with one of the at least two track systems, the steering axis being oriented such that a point of intersection with a ground surface is disposed in at least one of longitudinally forward from a longitudinal center point of the one of the at least two track systems, and laterally inward from a lateral center point of the one of the at least two track systems.

[0028] According to another aspect of the present technology, there is provided a method for assembling at least part of a track system of a vehicle. The method includes pivotally connecting a first support member to a first lateral side of an undercarriage assembly with a first pivot, receiving a drive wheel assembly between the first lateral side of the undercarriage assembly and a second lateral side of the undercarriage assembly, connecting a second support member to the first support member, and pivotally connecting the second support member to the second lateral side of the undercarriage assembly with a second pivot, the second pivot being laterally spaced from and aligned with the first pivot.

[0029] In some embodiments, pivotally connecting the first support member to the undercarriage assembly with the first pivot includes aligning a first undercarriage aperture of the undercarriage assembly with a first support aperture of the first support member; and inserting the first pivot in the first undercarriage aperture and the first support aperture.

[0030] In some embodiments, pivotally connecting the second support member to the undercarriage assembly with the second pivot includes aligning a second undercarriage aperture of the undercarriage assembly with a second support aperture of the second support member; and inserting the second pivot in the second undercarriage aperture and the second support aperture.

[0031] In some embodiments, connecting the second support member to the first support member includes partially inserting at least part of the second support member in a recess defined in a drive wheel assembly.

[0032] In some embodiments, the method further includes operatively connecting the drive wheel assembly to a shaft of the vehicle.

[0033] In some embodiments, the method further includes connecting the first support member to the vehicle.

[0034] In some embodiments, connecting the first support member to the vehicle includes connecting the first support member to a frame of the vehicle.

[0035] In some embodiments, the first support member is an interface member, and the method further includes connecting the interface member to a third support member, the third support member being configured to connect to the vehicle.

[0036] In some embodiments, the method is implemented on a production line of vehicles.

[0037] According to another aspect of the present technology, there is provided an interface member for a frame assembly of a track system. The interface member is configured to connect to at least one other member of the frame assembly. The interface member defines at least one connecting aperture, and is configured to connect to a pivot.

[0038] In some embodiments, the interface member is selectively connected to the at least one other member of the frame assembly.

[0039] In some embodiments, the interface member defines an aperture configured to receive a pivot.

[0040] According to another aspect of the present technology, there is provided a frame assembly for a track system. The frame assembly includes a support assembly, an undercarriage assembly and a pivot assembly. The support assembly includes a first support member configured to connect to a vehicle, and a second support member connected to the first support member. The undercarriage assembly is pivotally connected to the support assembly via a pivot assembly. The pivot assembly includes a first pivot connected to the first support member and a second pivot connected to the second support member. The first and second pivots are longitudinally aligned to each other and define a pivot axis. The first pivot and the second pivot are configured to be disposed on a same lateral side of a drive wheel assembly of the track system. The first pivot and the second pivot are connected to a same portion of the undercarriage assembly.

[0041] In the context of the present specification, unless expressly provided otherwise, the words “first”, “second”, “third”, etc. have been used as adjectives only for the purpose of allowing for distinction between the nouns that they modify from one another, and not for the purpose of describing any particular relationship between those nouns.

[0042] It must be noted that, as used in this specification, the singular form “a”, “an” and “the” include plural referents unless the context clearly dictates otherwise.

[0043] As used herein, the term “about” in the context of a given value or range refers to a value or range that is within 20%, preferably within 10%, and more preferably within 5% of the given value or range.

[0044] As used herein, the term “and / or” is to be taken as specific disclosure of each of the two specified features or components with or without the other. For example,“A and / or B” is to be taken as specific disclosure of each of (i) A, (ii) B and (iii) A and B, just as if each is set out individually herein.

[0045] Implementations of the present technology each have at least one of the above-mentioned objects and / or aspects, but do not necessarily have all of them. It should be understood that some aspects of the present technology that have resulted from attempting to attain the above-mentioned object may not satisfy this object and / or may satisfy other objects not specifically recited herein.

[0046] Additional and / or alternative features, aspects, and advantages of implementations of the present technology will become apparent from the following description and the accompanying drawings.

[0047] The present 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 drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, 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”, “containing”, “involving” and variations thereof herein, is meant to encompass the items listed thereafter as well as, optionally, additional items. In the following description, the same numerical references refer to similar elements.

[0048] In the context of the following description, “longitudinal” means in a direction parallel to a forward direction of travel of a vehicle, and “lateral” means in an orthogonal direction from the direction of travel of the vehicle. In the same context, unless mentioned otherwise, “outwardly” or “outward” means away from a longitudinal center plane of the vehicle, and “inwardly” or “inward” means toward the longitudinal center plane of the vehicle. In addition, “generally vertically” means in a direction contained in the longitudinal center plane along a height direction of the vehicle generally perpendicular to flat level ground.

[0049] Also, the term “wheel assemblies” include all the necessary structure (bearing structures, pins, axles and other components) to permit a structure / wheel to pivot / rotate about an axis, as the case may be. In the following description and accompanying Figures, track systems are configured to be attached to right and left sides of the chassis of the vehicle.BRIEF DESCRIPTION OF THE DRAWINGS

[0050] For a better understanding of the present technology, as well as other aspects and further features thereof, reference is made to the following description which is to be used in conjunction with the accompanying drawings, where:

[0051] It should be noted that, unless otherwise explicitly specified herein, the drawings are not to scale.

[0052] Figure l is a schematic right side elevation view of a tractor with front and rear track systems according to embodiments of the present technology;

[0053] Figure 2 is a perspective view taken from a top, rear, left side of the rear left track system of Figure 1;

[0054] Figure 3 is a perspective view taken from a top, rear, right side of the rear left track system of Figure 2;

[0055] Figure 4 is a partially exploded perspective view of the rear left track system of Figure 2;

[0056] Figure 5 is a perspective view of an interface support member of a frame assembly of the rear left track system of Figure 2;

[0057] Figure 6 is a cross-sectional view of the interface support member of Figure 5 taken along plane 6-6;

[0058] Figure 7 is an exploded perspective view of the rear left track system of Figure 2;

[0059] Figure 8 is a cross-sectional view taken along a lateral center plane of the rear left track system of Figure 2;

[0060] Figure 9 is a close-up of part of the cross-section of Figure 8;

[0061] Figure 10 is a perspective view taken from a front, top, left side of the front left track system of Figure 1;

[0062] Figure 11 is a perspective view taken from a rear, top, right side of the front left track system of Figure 10;

[0063] Figure 12 is a left side elevation view of the front left track system of Figure 10, with a steering axis being shown;

[0064] Figure 13 is a front elevation view of the front left track system of Figure 10, with the steering axis being shown;

[0065] Figure 14 is a perspective view taken from a top, front, left side of a front left track system according to an alternative embodiment of the present technology;

[0066] Figure 15 is a perspective view taken from a front of the left track system of Figure 14;

[0067] Figure 16 is a cross-sectional view of the left track system of Figure 14 taken along a lateral plane extending through a longitudinal center of the left track system;

[0068] Figure 17 is a close-up of a portion of the cross-sectional view of Figure 16;

[0069] Figure 18 is a perspective view of a part of the left track system of Figure14;

[0070] Figure 19 is a cross-sectional view of a pivot assembly according to an alternative embodiment of the present technology;

[0071] Figure 20 is a flow chart of a method for assembling at least part of a track system; and

[0072] Figures 21 to 27 depict steps for assembling at least part of an alternative track system.DETAILED DESCRIPTIONVEHICLE

[0073] The present technology will be presented in the context of a tractor 40 shown in Figure 1. It is contemplated that the present technology could be used with other types of tracked vehicles. Such tracked vehicles, include, for example and without limitation, agricultural vehicles (e.g., harvesters, combines, tractors, etc.), construction vehicles (e.g., bulldozers, front-end loaders, etc.), all-terrain vehicles, utility task vehicles, exploratory vehicles and / or with other unpowered vehicles such as trailers. It is further contemplated that these vehicles can be unmanned (e.g., autonomously driven), or manually driven.

[0074] Referring to Figure 1, the tractor 40 is shown. The tractor 40 has a frame 42 that houses a motor 44. It is contemplated that the motor 44 may be an internal combustion engine or an electric motor. The tractor 40 also has left and right rear track systems 50 (only right rear track system shown in Figure 1) and left and right front track systems 60 (only right front track system shown in Figure 1), all of which are operatively connected to the motor 44. It is contemplated that in some embodiments, some of the track systems 50, 60 may be replaced with wheels. The front track systems 60 are also operatively connected to a steering assembly 46. In some embodiments, the tractor 40 could be a skidsteer vehicle.REAR TRACK SYSTEMS

[0075] With reference to Figures 2 to 9, the left and right rear track systems 50 will now be described in greater detail. As the left and right rear track systems 50 are generally similar to one another, only the left rear track system 50 will be described in greater detail herewith.

[0076] The rear track system 50 includes a frame assembly 100, which will be described in greater detail below, a drive wheel assembly 102, idler wheel assemblies 104, support wheel assemblies 106, and an endless track 108.

[0077] The drive wheel assembly 102 is operatively connected to a shaft of the tractor 40, such that in response to the shaft rotating by the motor 44, the drive wheel assembly 102 also rotates about a drive wheel axis 110. The drive wheel axis 110 is generally perpendicular to a longitudinal center plane 51 (shown in Figure 8) of the track system 50. The drive wheel assembly 102 is positioned, in the lateral direction, such that a center thereof is generally aligned with the longitudinal center plane 51.

[0078] As best seen in Figure 8, the drive wheel assembly 102 has a laterally recessed portion 112 on its laterally outer side (i.e., the side laterally further from the tractor 40). As will be described below, the recessed portion 112 can facilitate assembly of the track system 50.

[0079] Referring to Figure 7, the frame assembly 100 includes a support assembly 120, an undercarriage assembly 122 and a pivot assembly 126. As will be described in greater detail below, the pivot assembly 126, which includes inner and outer pivots 300, 302, pivotally connect the support assembly 120 and the undercarriage assembly 122 to one another such that the support assembly 120 and the undercarriage assembly 122 are pivotable relative to one another about a pivot axis 305 (Figure 8 and 9).

[0080] The support assembly 120 connects the track system 50 to the tractor 40. The support assembly 120 includes an inner support member 130, an outer support member 132, and an interface support member 134. It is contemplated that in other embodiments, the support assembly 120 could have fewer or additional members. For example, in some embodiments, the support assembly 120 could just include the inner and outer support members 130, 132 (i.e., the interface support member 134 could be omitted).

[0081] The inner support member 130 is mostly disposed on a laterally inner side of the longitudinal center plane 51 (and thus, on a laterally inner side of the drive wheel assembly 102). The interface support member 134 is also disposed on the laterally innerside of the longitudinal center plane 51. In other instances, the outer support member 130 is disposed on a laterally outer side of the longitudinal center plane 51 (and thus on a laterally outer side of the drive wheel assembly 102).

[0082] The inner support member 130 includes a connecting portion 140, a body portion 142 and a driving portion 144.

[0083] The connecting portion 140 is disposed laterally inward from the body portion 142 and is fixedly connected thereto. More specifically, in the embodiment illustrated in Figures 4 to 7, the connecting portion 140 is integral with the body portion 142. The connecting portion 140 is configured to connect to the frame 42 of the tractor 40. In this embodiment, the connecting portion 140 is connected to the frame 42 via fasteners such as bolts and nuts that enable the track system 50 to be selectively connected to the tractor 40. The connecting portion 140 defines an aperture 141 that is configured to receive the shaft of the tractor 40 therethrough.

[0084] The body portion 142, which extends between the connecting portion 140 and the driving portion 144, is partially hollow so as to house a gearbox (not shown). The gearbox is configured to drivingly connect the shaft of the tractor 40 to the drive wheel assembly 102. The body portion 142 further includes a connecting interface 150 and two arm portions 146.

[0085] The connecting interface 150, which is configured to connect to the interface support member 134, is disposed on the laterally outer side, and is generally disposed at a longitudinal center of the body portion 142. It is contemplated that the connecting interface 150 may be positioned differently. The connecting interface 150 defines interface apertures 152 for receiving connectors 154. The connectors 154 enable the connection of the inner support member 130 with the interface support member 134. Each interface aperture 152 extends generally parallel to the drive wheel axis 110. As will be described below, the orientation of the interface apertures 152 can assist in facilitating assembly of the track system 50. It is contemplated that the connecting interface 150 may define recesses and / or protrusions so that the inner support member 130 has an interlocking engagement with the interface support member 134.

[0086] The two arm portions 146 are disposed on either longitudinal side of the connecting interface 150. The arm portions 146 extend in the lateral direction, such that when the track system 50 is assembled, one of the arm portions 146 is in front of the drive wheel assembly 102, and the other arm portion 146 is behind the drive wheel assembly 102. Each arm portion 146 defines connecting apertures 148 for receiving connectors 149, which enable the connection between the inner support member 130 and the outer support member 132. The number of connecting apertures 148, and thus the number of connectors 149, can vary from one embodiment to another. Each connecting aperture 148 extends generally parallel to the drive wheel axis 110. As will be described below, the orientation of the connecting apertures 148 can assist in facilitating assembly of the track system 50. Additionally, the connectors 149 are bolts, which provide a selective connection between the inner and outer support members 130, 132.

[0087] The driving portion 144 is disposed laterally outward from the body portion 142, and is fixedly connected thereto. The driving portion 144 and the connection portion 140 are positioned relative to one another such that a rotation axis passing through the driving portion 144 (e.g., drive wheel axis 110) is itself higher than a rotation axis passing through connecting portion 140 (e.g., drive shaft axis). It is contemplated that the relative positioning of the driving portion 144 and the connecting portion 140 may be different. The driving portion 144 is sized to receive a driving shaft that is operatively connected to the gearbox and to the drive wheel assembly 102. The driving shaft is in part supported by bearings received in the driving portion 144.

[0088] Referring to Figure 7, the outer support member 132 has two connecting portions 160 and a central portion 164.

[0089] One of the connecting portions 160 is disposed at a front longitudinal end of the outer support member 132, and the other connecting portion 160 is disposed at a rear longitudinal end of the outer support member 132. Each connecting portion 160 defines connecting apertures 168 for receiving the connectors 149. Thus, the connecting apertures 168 are configured to align with the connecting apertures 148. The number of connecting apertures 168 can vary from one embodiment to another. Each of the connecting apertures168 extends generally parallel to the drive wheel axis 110. As will be described below, the orientation of the connecting apertures 168 can assist in facilitating assembly of the track system 50.

[0090] The central portion 164 extends between the two connecting portions 160. Part of the central portion 164 is laterally offset from the connecting portions 160. More specifically, the central portion 164 is further laterally outward from the longitudinal center plane 51 than the connecting portions 160. This lateral offset provides clearance for receiving part of the drive wheel assembly 102. As will be described below, this lateral offset as well as the recessed portion 112, can together facilitate assembly of the track system 50.

[0091] The central portion 164 defines an aperture 165 configured to receive therein the outer pivot 302 of the pivot assembly 126. It is contemplated that in some embodiments, the aperture 165 may be omitted, and that the outer pivot 302 may be integral with the central portion 164.

[0092] The interface support member 134 is configured to connect to the inner support member 130 via the connecting interface 150. It is contemplated that in some implementations of the present technology, the interface support member 134 could be configured to connect directly to the tractor 40.

[0093] As best seen in Figure 6, the interface support member 134 defines a pivot aperture 171 configured to receive the inner pivot 300 of the pivot assembly 136 therein. In the illustrated embodiment, the inner pivot 300 is connected to the interface support member 134 via a press-fitted connection. In some embodiments, the pivot aperture 171 could be omitted, and the inner pivot 300 could be integral with the interface support member 134.

[0094] As best seen in Figure 5, the interface support member 134 further defines interface apertures 172. The interface apertures 172 are configured to align with the interface apertures 152, and receive the connectors 154 therethrough. The number of interface apertures 172 can vary from one embodiment to another. Each of the interfaceapertures 172 extends generally parallel to the drive wheel axis 110. As will be described below, the orientation of the interface apertures 172 can assist in facilitating assembly of the track system 50.

[0095] The connectors 149, 154 are bolts. It is contemplated that in other embodiments, the connectors 149, 154 could be other types of fasteners.

[0096] Referring back to Figure 7, the undercarriage assembly 122 will now be described in greater detail. The undercarriage assembly 122 includes an upper undercarriage member 200, a lower undercarriage member 202 moveably connected to the upper undercarriage member 200, a suspension assembly 204 disposed between the upper and lower undercarriage members 200, 202, and a tensioner 206.

[0097] It is contemplated that in some embodiments, the undercarriage assembly 122 could have additional or fewer members. For example, the undercarriage assembly 122 may just be a single undercarriage. In other instances, the tensioner 204 and / or the suspension assembly 206 may be omitted.

[0098] The upper undercarriage member 200 has an inner connecting portion 210 and an outer connecting portion 212. The inner and outer connecting portions 210, 212 are laterally spaced from one another so as to define a recess 214 therebetween. The recess 214 is configured to receive part of the drive wheel assembly 102 therein. The inner connecting portion 210 defines an aperture 216 that is configured to receive the inner pivot 300. Similarly, the outer connecting portion 212 defines an aperture 218 that is configured to receive the outer pivot 302. The apertures 216, 218 are longitudinally aligned with one another, and are aligned with the pivot axis 305. As will be described below, the upper undercarriage member 200 is pivotable with respect to the support assembly 120 thanks to the inner and outer pivots 300, 302.

[0099] The upper undercarriage member 200 defines end apertures 230 at either longitudinal end thereof. The end apertures 230 are configured to receive shafts of their respective idler wheel assemblies 104. One idler wheel assembly 104 is connected to the upper undercarriage member 200 via the tensioner 206. It is contemplated that in someembodiments, there could be only one end aperture 230. It is also contemplated that in other embodiments, the end apertures 230 could be omitted.

[0100] The upper undercarriage member 200 further defines a lower recess 235 on an underside thereof. The lower recess 235, which extends along a length of the upper undercarriage member 200, is configured to receive part of the lower undercarriage member 202 therein.

[0101] The lower undercarriage member 202 is movably connected to the upper undercarriage member 200 via fasteners 205 passing through slots 238 of the lower undercarriage member 202 and apertures 239 of the upper undercarriage member 200. Fasteners 205, slots 238 and apertures 239 extend generally parallel to the drive wheel axis 110. As will be described below, the orientation of the fasteners 205 and slots 238 can assist in facilitating assembly of the track system 50.

[0102] The lower undercarriage member 202 is a wheel-carrying structure, such that it has the support wheel assemblies 106 connected thereto. In some embodiments, shafts of the support wheel assemblies 106 may be integral with the lower undercarriage member 202. In other embodiments, shafts of the support wheel assemblies 106 may be selectively connected to the lower undercarriage member 202. It is contemplated that in some embodiments, the lower undercarriage member 202 could be configured to have the idler wheel assemblies 104 connected thereto.

[0103] The suspension assembly 204 includes two biasing members 240 positioned at opposite ends of the lower undercarriage member 202. The biasing members 240 are disposed between the upper and lower undercarriage members 200, 202. The biasing members 240 can dampen vibrations and can limit vibration transmission between the upper and lower undercarriage members 200, 202. Additionally, in response to the lower undercarriage member 202 moving relative to the upper undercarriage member 200, the biasing members 240 resiliently deform, and bias the lower undercarriage member 202 toward a given position. Examples of suspension assembly 204 are, without being limited to, described in United States Patent No. US11,814, 118B2, granted November 14, 2023, and in PCT Patent Application No. PCT / CA2024 / 050483, published under No.WO2024 / 212013A1 on October 17, 2024, which are incorporated by reference herein in their entirety.

[0104] Referring to Figures 7 to 9, the pivot assembly 126, which provides a pivotal connection between the support assembly 120 and the undercarriage assembly 122, includes the inner pivot 300, the outer pivot 302, an inner seal 304 and an outer seal 306. It is contemplated that the pivot assembly 126 may include additional or fewer components.

[0105] The inner pivot 300 is disposed on an inner lateral side of the longitudinal center plane 51 (and thus on an inner lateral side of the drive wheel assembly 102), whereas the outer pivot 302 is disposed on an outer lateral side of the longitudinal center plane (and thus on an outer lateral side of the drive wheel assembly 102). The inner and outer pivots 300, 302 are laterally spaced from one another, and longitudinally aligned with one another. The inner and outer pivots 300, 302 together define the pivot axis 305. The pivot axis 305 is longitudinally aligned with the drive wheel axis 110. The pivot axis 305 is vertically lower than the drive wheel axis 110. It is contemplated that in some embodiments, the pivot axis 305 could be positioned differently (e.g., longitudinally offset from the drive wheel axis 110 and / or vertically aligned with the drive wheel axis 110).

[0106] The inner pivot 300 pivotally connects the upper undercarriage member 200 to the inner support member 130 via the interface support member 134. As mentioned above, in the present embodiment, the inner pivot 300 is press-fitted into the pivot aperture 171. It is contemplated that the inner pivot 300 may be integral with the interface support member 134. It is also contemplated that the inner pivot 300 could be directly connected to the inner support member 130 (i.e., bypassing the interface support member 134). For example, the inner pivot 300 may be integral with the inner support member 130. In other embodiments, the inner pivot 300 may be selectively connectable to either the undercarriage member 200, the inner support member 130, or the interface support member 134.

[0107] The inner pivot 300 is connected to the upper undercarriage member 200 via the aperture 216 defined in the upper connecting portion 210. In the present embodiment, a bearing 310 is also received in the aperture 216. The bearing 310 is disposedradially between the inner pivot 300 and the upper undercarriage member 200, such that the inner pivot 300 can pivot relative to the upper undercarriage member 200 about the pivot axis 305. Thus, the bearing 310 enables movement between the upper undercarriage member 200 and the inner support member 130. The bearing 310 is a filament wound bearing, but other types of bearings are contemplated.

[0108] The inner seal 304 is also disposed in the aperture 216. The inner seal 304 is disposed between the opening of the aperture 216 and the bearing 310, and can protect the bearing 310 from contamination from debris such as dust or water.

[0109] The inner seal 304 has an inner race 320, an outer race 322 and a resilient portion 324 that is connected to, and disposed between, the inner and outer races 320, 322.

[0110] The inner race 320 is generally fixed to the pivot 300, whereas the outer race 322 is generally fixed to the upper undercarriage member 200. In response to pivot 300 rotating relative to the upper undercarriage member 200, the inner race 320 rotates relative to the outer race 322, which causes the resilient portion 324 to deform. More specifically, the resilient portion 324 undergoes torsional deformation.

[0111] Since the relative movement between the support assembly 120 and the undercarriage assembly 122 is a movement that is configured to oscillate by at most about 40 degrees about the pivot axis 305, the torsional deformation does not exceed a threshold amount. In some embodiments, the relative movement oscillates by at most about 30 degrees about the pivot axis 305. In some embodiments, the relative movement oscillates by at most about 20 degrees about hte pivot axis 305. In some embodiments, the relative movement oscillates by at most about 15 degrees about the pivot axis 305. Thus, the inner seal 304 being a a shear seal is believed to be optimal for this purpose. Additionally, since the inner and outer races 320, 322 are fixedly connected to their respective moving parts (i.e., the inner and outer races 320, 322 do not move relative to the inner pivot 300 and the upper undercarriage member 300 respectively), the seal provided by the seal 310 is better and more durable than conventional seals.

[0112] In more detail, conventional seals such as rotary shaft seals, rings, radial seals, spring-loaded seals, or lip seals typically rub against a moving surface, which generates friction and induces premature wear.

[0113] The outer pivot 302 pivotally connects the upper undercarriage member 200 to the outer support member 132.

[0114] The outer pivot 302 is connected to the outer support member 132 via the aperture 165. In the present embodiment, the outer pivot 302 is press-fitted into the aperture 165. It is contemplated that the outer pivot 302 could be connected to the outer support member 132 differently. For example, the outer pivot 302 could be integral with the outer support member 132. In other embodiments, the outer pivot 302 may be selectively connectable to either the undercarriage member 200, or the outer support member 132.

[0115] The outer pivot 302 is connected to the upper undercarriage member 200 via the aperture 218 defined in the upper connecting portion 212. In the present embodiment, a bearing 312 is also received in the aperture 218, and is disposed radially between the inner pivot 300 and the upper undercarriage member 200. The seal 306 is also disposed in the aperture 218. The bearing 312 and the seal 308 are similar to the bearing 310 and the seal 304, such that they will not be re-described in detail herewith.

[0116] As seen in Figure 7, the endless track 108 has an inner surface 330 and an outer surface 332. The inner surface 330 of endless track 108 has a set of longitudinally spaced lugs 334. In some embodiments, there could be two or more laterally spaced sets of longitudinally spaced lugs 334. The lugs 334 are adapted to engage with the drive wheel assembly 102. The outer surface 332 of the endless track 108 has a tread defined thereon. It is contemplated that the tread could vary from one embodiment to another. In some embodiments, the tread could depend on the type of vehicle on which the track system 50 is to be used and / or the type of ground surface on which the vehicle is destined to travel. In the present embodiment, the endless track 108 is an endless polymeric track. It is contemplated that in some embodiments, the endless track 108 could be constructed of a wide variety of materials and structures.FRONT TRACK SYSTEM

[0117] With reference to Figures 10 to 13, the left and right front track systems 60 will now be described in greater detail. As the left and right front track systems 60 are mirror images of one another, only the left front track system 60 will be described in greater detail herewith.

[0118] Being that the front track system 60 is similar to the rear track system 50, features of the front track system 60 similar to those of the rear track system 50 have been labeled with the same reference numerals and will not be re-described in detail herewith.

[0119] The front track system 60 notably differs from the rear track system 50 in that the front track system 60 has fewer support wheel assemblies 106, though it is contemplated that the front track system 60 could have the same number of support wheel assemblies 106 as the rear track system 50.

[0120] The support assembly 120’ of the front track system 60 also notably differs from the support assembly 120 of the rear track system 50. The support assembly 120’ includes a support member 405, an inner support member 400 and an outer support member 402.

[0121] The support member 405 is configured to connect to the vehicle. In some cases, the support member 405 defines an aperture 410 that is configured to receiving a driving shaft of the vehicle 40 therethrough. The support member 405 is pivotally connected to the inner support member 400 via pivots such that the inner support member 400 can pivot relative to the support member 405 about a pivot axis 407 via a steering assembly.

[0122] The pivot axis 407 is such that, when on a generally solid flat surface, an intersection of the pivot axis 407 with a bottom of the endless track 108 (and thus with the ground surface) is disposed laterally inwardly from a longitudinal center plane 51, and longitudinally forward from the longitudinal center point. It is contemplated that the present technology could be configured to change the orientation of the pivot axis 407.

[0123] It will be appreciated that the present technology enables the connection of the track system 60 to the vehicle 40 with the appropriate orientation with minimal adjustments required.

[0124] The inner support member 400 defines an aperture 412 that is generally aligned with the aperture 410. The aperture 412 is configured to receive a driving shaft that is drivingly connected to the driving shaft of the tractor 40 via a universal joint.

[0125] The inner support member 400 and the outer support member 402 are connected to one another similarly to the inner and outer support members 130, 132, and will therefore not be described in detail herewith. The same generally applies to the connection between the support assembly 120 and the undercarriage assembly 122.ALTERNA TIVE EMBODIMENT

[0126] Referring to Figures 14 to 18, a track system 1060, which is an alternative embodiment of the track system 60, will now be described. Features of the track system 1060 similar to those of the track system 60 have been labeled with the same reference numerals, and will not be re-described in detail herewith.

[0127] In the track system 1060, the frame assembly 100 includes a support assembly 1120, an undercarriage assembly 1122 and a pivot assembly 1126 (Figures 16 and 17) that pivotally connects the support assembly 1120 to the undercarriage assembly 1122.

[0128] In this embodiment, the pivot assembly 1126 is entirely disposed on the inner lateral side of the drive wheel assembly 102 (instead of being disposed on either lateral side of the drive wheel assembly 102 as described with reference to track system 60). In other embodiments, a majority of the pivot assembly 1126 could be disposed on the inner lateral side of the drive wheel assembly 102. It is contemplated that a similar configuration could be implemented in the track system 50 or another rear track system. Thus, in the illustrated embodiment, the pivot assembly 1126 includes an inner pivot 1300 and an outer pivot 1302, both of which are disposed on the same lateral side as one another.

[0129] The inner pivot 1300 has one end rotationally connected to the support assembly 1120 (e.g., outer support member) via a bearing 1310, and the other end fixedly connected to the undercarriage assembly 1122 (e.g., upper undercarriage member) via an interference fit (e.g., press-fitted connection), though other connections are contemplated. Similarly, the outer pivot 1302 has one end rotationally connected to the support assembly 1120 (e.g., inner support member or an interface support member) via a bearing 1312, and the other end fixedly connected to the undercarriage assembly 1122 (e.g., upper undercarriage member) via an interference fit (e.g., press-fitted connection), though other connections are contemplated. The inner and outer pivots 1300, 1302 can be said to be laterally adjacent to one another. More specifically, the inner and outer pivots 1300, 1302 are axially aligned with one another and abut with one another. It is contemplated that in some embodiments, a gap may be present between the inner and outer pivots 1300, 1302. In the present embodiment, the inner and outer pivots 1300, 1302 are connected to one another by a bolt 1305 and a nut 1306.

[0130] Cap seals 1400 are connected on either side of the bearings 1310, 1312. The cap seals 1400 provide a seal to protect the bearings 1310, 1312 from debris such as water. Cap seals 1400 also provide selective access to the pivot assembly 1326.

[0131] Referring to Figure 19, an alternative embodiment of the pivot assembly 1126, namely pivot assembly 2126’ is shown. In this embodiment, the pivot assembly 2126’ includes a single pivot 2300’. In some interpretations, it can be said that the inner and outer pivots are integral so as to form one single pivot. The pivot 2300’ is fixedly connected to the support assembly 1120 via bearings 2310’, 2312’ and is fixedly connected to the undercarriage assembly 1122 via an interference fit.METHOD OF ASSEMBLY

[0132] Referring back to the rear track system 50 and referring to Figure 20, a method 500 for assembling the frame assembly 100 and the track system 50 will now be described. It is noted that the order of the steps of the method 500 is shown as an example, and therefore the steps of the method 500 may vary in other embodiments.

[0133] The method 500 begins at step 505, where the inner support member 130 is connected to the frame 44 of the tractor 40. The inner support member 130 is connected to the frame 44 via fasteners. It will be appreciated that connecting the inner support member 130 to the frame 44 is easier than directly connecting a large frame assembly or even a whole track system to the frame 44.

[0134] The method 500 continues with step 510, by pivotally connecting the inner support member 130 to the upper undercarriage member 200 with an inner pivot 300. In the illustrated embodiment, this is done by connecting the inner pivot 300 to the interface support member 134, connecting the interface support member 134 to the inner support member 130, and inserting the inner pivot 300 in the aperture 216 of the upper undercarriage member 200. The inner pivot 300 is connected to the interface support member 134 by being press-fitted into the pivot aperture 171, for example via a c-clamp. In other embodiments, the inner pivot 300 could be integral with the interface support member 134. The interface support member 134 is connected to the inner support member 130 via the connectors 154.

[0135] In other implementations of the present technology, pivotally connecting the inner support member 130 to the upper undercarriage member 200 with the inner pivot 300 could be done without the interface support member 134. For example, the inner pivot 300 could be integral with the inner support member 130. In yet another example, the inner pivot 300 could be directly connected to the inner support member 130 and the upper undercarriage member 200 via apertures defined therein.

[0136] Additionally, the inner seal 304 is connected to the inner pivot 300. The aperture 216 is then aligned with the inner pivot 300, and the inner pivot 300 is received in the aperture 216, such that the inner seal 304 is also connected to the inner pivot 300. It is contemplated that in other implementations of the method 500, the inner pivot 300 could be received in the apertures 216, 171 at the same time.

[0137] The method continues with step 515, by receiving the drive wheel assembly 102 between the inner connecting portion 210 and the outer connecting portion 212 of upper undercarriage assembly 122. This can notably be achieved due the presence of the214, in which part of the drive wheel assembly 102 is received. Additionally, the drive wheel assembly 102 is also operatively connected to the shaft of the tractor 40 via the inner support member 130. More specifically, the drive wheel assembly 102 is connected to the shaft received in the driving portion 144 of the inner support member 130. It is contemplated that the drive wheel assembly 102 may be pre-installed on the vehicle 40 before proceeding with the installation steps of other components of the track system 50.

[0138] The method continues with step 520, by connecting the outer support member 132 to the inner support member 130. This can be done by aligning the connecting apertures 168 of the connecting portions 160 to the respective connecting apertures 148 of the arm portions 146, and by inserting the connectors 149 in the connecting apertures 148, 168. At this step 520, the support assembly 120 surrounds the drive wheel assembly 102.

[0139] In some embodiments, to be able to correctly position the outer support member 132 relative to the inner support member 130, the method 500 also includes inserting part of the outer support member 132 in the recessed portion 112.

[0140] The method continues with step 525, by pivotally connecting the outer support member 132 to the outer connecting portion 212 of the upper undercarriage member 122 with the outer pivot 302. In the illustrated embodiment, this is done by aligning the aperture 218 of the outer connecting portion 212 with the aperture 165, positioning the outer seal 306 in the aperture 218, and inserting the outer pivot 302 into the apertures 165, 218. In some instances, the outer pivot 302 can be press-fitted into the aperture 165 and into the bearing 312, which is received in the aperture 218. A cap 139 can then be positioned on the outer side of the aperture 165 for protecting the outer pivot 302 from debris. It is contemplated that in other embodiments, the outer pivot 302 could be connected to the upper undercarriage member 122 before connecting it to the outer support member 132.

[0141] It will be appreciated that the present technology enables at least some of the above-mentioned steps to be performed on an assembly line, which can assist in accelerating assembling the track systems 50 and connecting them to the tractor 40.

[0142] It will be appreciated that the orientation of the connectors 149, 154 and the fasteners 205 being generally horizontal facilitates assembly thereof. Especially if such assembly is performed manually, the assembler does not need to constantly adjust the orientation of his tools to fasten the connectors.

[0143] It is contemplated that in some implementations of the method 400, the method 400 could further include an alignment step for aligning some components of the track system 50 relative to other components of the track system 50 or relative to the tractor 40. In some instances, the alignment step could be performed while the track system 50 is being assembled, or after the track system 50 has been assembled.

[0144] Additionally, the modular aspect of the frame assembly 100 facilitates the assembly and connection thereof to the tractor 40.ALTERNATIVE METHOD OF ASSEMBLY

[0145] Referring to Figures 21 to 27, an alternative method of assembly for assembling at least part of an alternative track system 3050 (partially shown in Figure 27) will be described. Features of the track system 3050 similar to those of the track system 50 have been labeled with the same reference numerals, and will not be described in detail herewith again.

[0146] To begin assembly, referring to Figures 21 and 22, in this embodiment, a support member 3134 is pivotally connected to the upper undercarriage member 200. It is contemplated that the support member 3134 could be configured to connect to a vehicle or to another member, which in turn connects to the vehicle.

[0147] To pivotally connect the support member 3134 to the upper undercarriage member 200, part of the upper undercarriage member 200 is received in a recess 3140 defined by a bracket 3142 of the support member 3134. The bracket 3142 and the recess 3140 can assist in easily positioning the upper undercarriage member 200 relative to the support member 3134. Then, apertures 3144 defined in the support member 3134 are aligned with the aperture 216 of the upper undercarriage member 200 (as shown in Figures 22 and 23). Once the apertures 3144, 216 are aligned, an inner pivot 300 is inserted intothe apertures 3144, 216 (as shown in Figures 23 and 24), thereby pivotally connecting the support member 3134 to the upper undercarriage member 200.

[0148] The drive wheel assembly 102 is then connected to the vehicle, with part of the drive wheel assembly 102 being received between the inner connecting portion 210 and the outer connecting portion 212 of upper undercarriage assembly 122. Alternatively, the drive wheel assembly 102 may have already been connected to the vehicle, and the method includes connecting the support member 3132 and the upper undercarriage member 200 to the vehicle, which would be easy due to the clearance provided by the recess 214.

[0149] Referring to Figures 25 and 26, a support member 3132 is also pivotally connected to the upper undercarriage member 200. To pivotally connect the support member 3132 to the upper undercarriage member 200, the support member 3132 is first positioned in an appropriate position relative to the upper undercarriage member 200, in which apertures 3133 (Figure 26) of the support member 3132 align with the aperture 218 of the outer connecting portion 212. The recessed potion 112 of the drive wheel assembly 102 provides clearance such that when the drive wheel assembly 102 is received in the recess 214 (i.e., between the inner and outer connecting portions 210, 212), the support member 3132 can easily be moved to its appropriate position. Once the apertures 3133, 218 are aligned, the outer pivot 302 can be received therein. In some instances, the outer pivot 302 may already be connected to the upper undercarriage member 200 (e.g., integral or connected via press-fit).

[0150] Then, referring to Figure 27, end caps 3139 can be connected to the end of the aperture 318 for providing an outer seal.

[0151] Modifications and improvements to the above-described implementations of the present technology may become apparent to those skilled in the art. The foregoing description is intended to be exemplary rather than limiting. The scope of the present technology is therefore intended to be limited solely by the scope of the appended claims.

Claims

CLAIMS:

1. A frame assembly for a track system, the frame assembly comprising: a support assembly comprising: a first support member configured to connect to a vehicle; and a second support member connected to the first support member; an undercarriage assembly pivotally connected to the support assembly via a pivot assembly; the pivot assembly including a first pivot connected to the first support member, and a second pivot connected to the second support member, the first and second pivots being laterally spaced from, and aligned to, each other and defining a pivot axis, the first pivot being configured to be disposed on a first lateral side of a drive wheel assembly of the track system and the second pivot being configured to be disposed on a second lateral side of the drive wheel assembly.

2. The frame assembly of claim 1, further comprising a plurality of connectors connecting the first support member to the second support member, the plurality of connectors extending generally parallel to the pivot axis.

3. The frame assembly of claim 1 or 2, wherein the first support member is selectively connected to the second support member.

4. The frame assembly of any one of claims 1 to 3, wherein the first support member is configured to connect to a frame of the vehicle.

5. The frame assembly of any one of claims 1 to 4, wherein the first support member is a yoke member.

6. The frame assembly of any one of claims 1 to 4, wherein the first support member is an interface member.

7. The frame assembly of any one of claims 1 to 6, wherein the drive wheel assembly defines a drive wheel axis, and the pivot axis is longitudinally aligned with the drive wheel axis.

8. The frame assembly of any one of claims 1 to 6, wherein the drive wheel assembly defines a drive wheel axis, and the pivot axis is vertically lower than the drive wheel axis.

9. The frame assembly of any one of claims 1 to 8, wherein the first pivot is selectively connected to the first support member, and the second pivot is selectively connected to the second support member.

10. The frame assembly of any one of claims 1 to 9, wherein the pivot assembly further includes: a first seal including: a first inner race generally rotationally fixed relative to the first support member; a first outer race generally rotationally fixed relative to the first pivot; and a first resilient portion connecting the first inner race with the first outer race, a second seal including: a second inner race generally rotationally fixed relative to the second support member;a second outer race generally rotationally fixed relative to the second pivot; and a second resilient portion connecting the second inner race with the second outer race, in response to the first inner race rotating relative to the first outer race, the first resilient portion undergoing torsional deformation, and in response to the second inner race rotating relative to the second outer race, the second resilient portion undergoing torsional deformation .

11. The frame assembly of claim 10, wherein the first inner race is rotatable relative to the first outer race about the pivot axis by about 15 degrees, and the second inner race is rotatable relative to the second outer race about the pivot axis by about 15 degrees.

12. The frame assembly of any one of claims 1 to 11, wherein the first pivot is selectively connected to the first support member, and the second pivot is selectively connected to the second support member.

13. The frame assembly of any one of claims 1 to 12, wherein the undercarriage assembly includes a first undercarriage member and a second undercarriage member, the first undercarriage member being pivotally connected to the support assembly, and the second undercarriage member being configured to carry at least one wheel assembly.

14. A track system comprising: the frame assembly according to any one of claims 1 to 13; a drive wheel assembly operatively connected to the frame assembly; at least one wheel assembly connected to the frame assembly; andan endless track surrounding the frame assembly, the drive wheel assembly, and the at least one wheel assembly.

15. The track system of claim 14, wherein the drive wheel assembly defines a recessed portion configured to receive the second support member therein.

16. The track system of claim 14, wherein the recessed portion is configured to enable connection of the second support member to the first support member.

17. The track system of any one of claims 14 to 16, wherein the track system is a rear track system.

18. The track system of any one of claims 14 to 16, wherein the track system is a front track system.

19. A vehicle comprising: a frame; a motor supported by the frame; and at least two track systems according to any one of claims 14 to 16, the at least two track systems being operatively connected to the motor.

20. The vehicle of claim 19, being configured to provide a steering axis with one of the at least two track systems, the steering axis being oriented such that a point of intersection with a ground surface is disposed in at least one of: longitudinally forward from a longitudinal center point of the one of the at least two track systems, andlaterally inward from a lateral center point of the one of the at least two track systems.

21. A method for assembling at least part of a track system of a vehicle, the method including: pivotally connecting a first support member to a first lateral side of an undercarriage assembly with a first pivot; receiving a drive wheel assembly between the first lateral side of the undercarriage assembly and a second lateral side of the undercarriage assembly; connecting a second support member to the first support member; and pivotally connecting the second support member to the second lateral side of the undercarriage assembly with a second pivot, the second pivot being laterally spaced from and aligned with the first pivot.

22. The method of claim 21, wherein pivotally connecting the first support member to the undercarriage assembly with the first pivot includes: aligning a first undercarriage aperture of the undercarriage assembly with a first support aperture of the first support member; and inserting the first pivot in the first undercarriage aperture and the first support aperture.

23. The method of claim 21 or 22, wherein pivotally connecting the second support member to the undercarriage assembly with the second pivot includes: aligning a second undercarriage aperture of the undercarriage assembly with a second support aperture of the second support member; and inserting the second pivot in the second undercarriage aperture and the second support aperture.

24. The method of any one of claims 21 to 23, wherein connecting the second support member to the first support member includes partially inserting at least part of the second support member in a recess defined in a drive wheel assembly.

25. The method of any one of claims 21 to 24, further comprising operatively connecting the drive wheel assembly to a shaft of the vehicle.

26. The method of any one of claims 21 to 25, further comprising connecting the first support member to the vehicle.

27. The method of claim 26, wherein connecting the first support member to the vehicle includes connecting the first support member to a frame of the vehicle.

28. The method of any one of claims 21 to 27, wherein the first support member is an interface member, and the method further includes connecting the interface member to a third support member, the third support member being configured to connect to the vehicle.

29. The method of any one of claims 21 to 27 being implemented on a production line of vehicles.

30. An interface member for a frame assembly of a track system, the interface member being configured to connect to at least one other member of the frame assembly, the interface member defining at least one connecting aperture, and being configured to connect to a pivot.

31. The interface member of claim 30, wherein the interface member is selectively connected to the at least one other member of the frame assembly.

32. The interface member of claim 30 or 31, defining an aperture configured to receive a pivot.

33. A frame assembly for a track system, the frame assembly comprising: a support assembly comprising: a first support member configured to connect to a vehicle; and a second support member connected to the first support member; an undercarriage assembly pivotally connected to the support assembly via a pivot assembly; the pivot assembly including a first pivot connected to the first support member and a second pivot connected to the second support member, the first and second pivots being longitudinally aligned to each other and defining a pivot axis, the first pivot and the second pivot being configured to be disposed on a same lateral side of a drive wheel assembly of the track system; and the first pivot and the second pivot are connected to a same portion of the undercarriage assembly.

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