Track assembly for tracked vehicles

Abstract

The present invention relates to a track assembly (T1, T2) for a tracked vehicle (V). The track assembly comprises a track support beam (10) configured to support road wheels (RW), a drive wheel member (DW), and a drive device (D) for operating the drive wheel member, and an endless track (E) arranged around the road wheels (RW) and the drive wheel member (DW). The drive device (D) comprises a drive unit (M) for driving the drive wheel member (DW), and the drive device (D) comprises a drive axle (40) configured to be arranged coaxially with respect to the central axis (Z) of the drive wheel member (DW) to rotate the drive wheel member (DW). The drive unit (M) is configured to journal with bearings on a portion of the drive axle (40). The drive unit (M) comprises a torque arm (220) configured to be connected to the track support beam (10) to essentially prevent rotation of the drive unit (M) around the central axis (Z).

Description

Technology Field

[0001] The present invention relates to a track assembly for a tracked vehicle. The present invention relates to a tracked vehicle comprising at least one such track assembly. Background Technology

[0002] A tracked vehicle may include a pair of track assemblies, wherein each track assembly of the pair of track assemblies includes a track support beam, a drive wheel member, a plurality of road wheels, and an endless track running on the drive wheel member and the plurality of road wheels. The drive wheel member and the plurality of road wheels are rotatably fixed to the track support beam. A drive unit of the drive device of the tracked vehicle may be configured to drive a drive axle to propel the tracked vehicle and, consequently, to rotate the drive wheel member positioned to drive the endless track.

[0003] WO2018222105A1 discloses a tracked vehicle having a pair of track assemblies and a body supported by suspension by said pair of track assemblies. Each track assembly comprises a plurality of road wheels, a drive wheel, a track support beam supporting a drive unit having a motor for operating said drive wheel, and an endless track arranged around said wheels. The motor is positioned relative to the drive wheel such that the motor is received within the periphery of the drive wheel in a direction at least partially across the main extension direction of the track assembly. The stator of the motor is fixedly positioned to the track support beam via a fastening device in the form of a fork configuration arranged to support the drive wheel and the motor, and said drive wheel is rotatably coupled to the rotor of said motor.

[0004] However, it is necessary to suggest improvements to the track assembly for tracked vehicles. The problem to be solved

[0005] The object of the present invention is to provide a track assembly for a tracked vehicle comprising a drive unit that facilitates a radially compact drive unit while having an effective function of the drive unit.

[0006] Another objective of the present invention is to provide a tracked vehicle having at least one such tracked assembly. means of solving the problem

[0007] These and other purposes, which are evident from the following description, are achieved by a track assembly for a tracked vehicle and a tracked vehicle as described in the appended independent claim. Preferred embodiments of the track assembly are defined in the appended dependent claims.

[0008] Specifically, the objective of the present invention is achieved by a track assembly for a tracked vehicle. The track assembly is configured to be connected to the vehicle body. The track assembly includes a plurality of road wheels, a drive wheel member, and a track support beam configured to support a drive device for operating the drive wheel member, wherein the drive wheel member is configured to rotate about a central axis. An endless track is arranged around the road wheels and the drive wheel member. The drive device includes a drive unit for driving the drive wheel member. The drive device includes a drive axle configured to be positioned coaxially with respect to the central axis of the drive wheel member to rotate the drive wheel member. The drive unit is configured to journal with a bearing on a portion of the drive axle protruding from the drive wheel member. The drive unit includes a torque arm configured to be connected to the track support beam to fundamentally prevent rotation of the drive unit about the central axis.

[0009] Accordingly, a radially compact drive device can be provided that facilitates the efficient functioning of the drive unit, namely the motor device and the transmission device.

[0010] According to one embodiment of the above-described track assembly, the drive axle is configured to journal with a bearing in the track support beam to allow rotation of the drive wheel member relative to the track support beam, and the drive axle is configured to protrude from the inner surface of the track support beam, which is configured to penetrate the track support beam and face toward the vehicle body when the track assembly is connected to the vehicle body, and the drive unit is configured to journal with a bearing on the portion of the drive axle that protrudes from the inner surface of the track support beam relative to the drive wheel member. Accordingly, by positioning the drive axle to journal with a bearing in the track support beam, the drive unit can be efficiently supported on the track support beam, for example, by a bearing configuration. By doing so, the drive axle of the drive unit is essentially coaxial with the central axis of the drive wheel member, and accordingly, an efficient and radially compact drive unit can be provided by the track assembly, facilitating high operational reliability and efficiency when used in a tracked vehicle. This solution can be easily and efficiently applied to existing track assemblies and can be used with existing drive wheel members.

[0011] According to one embodiment of the above-described track assembly, the torque arm is configured to provide torque resistance in relation to the rotation of the drive axle. By doing so, a radially compact drive device can be provided that facilitates the efficient functioning of the drive device in relation to the drive associated with the rotation of the drive axle.

[0012] According to one embodiment of the above-described track assembly, the drive unit comprises a motor device for providing torque to drive the drive wheel member and a transmission device for transmitting torque from the motor device to the drive wheel member, wherein the transmission device is configured to be positioned with respect to the inner surface of the track support beam, and the inner surface is configured to face the vehicle body when the track assembly is connected to the vehicle body, and the motor device is configured to be positioned internally with respect to the transmission device such that the transmission device is positioned between the motor device and the drive wheel member. Thus, a drive unit is provided that facilitates efficient drive operation with a radially compact drive device, thereby providing a drive device.

[0013] According to one embodiment of the above-described track assembly, the drive unit includes a housing configuration, and the torque arm is attached to the housing configuration or forms part of the housing configuration. This allows for efficient enclosing of the motor unit, transmission unit, and drive axle, and efficient journaling of the drive unit.

[0014] According to one embodiment of the above-described track assembly, the housing configuration is arranged to accommodate the motor unit of the motor device and the transmission unit of the transmission device. Thus, efficient enclosure of the motor unit and the transmission unit is provided for the efficient operation of the drive device.

[0015] According to one embodiment of the above-described track assembly, the torque arm is configured to be connected to a track support beam such that the torque arm acts on the track support beam with respect to the journaling center of the bearing of the drive wheel member in order to limit the tipping torque of the torque arm. By positioning the torque arm in the center, the connection of the drive unit, i.e., the torque arm of the drive unit, to the track support beam through the suspension system can be efficiently achieved, and accordingly, the tipping movement is limited.

[0016] According to one embodiment of the above-described track assembly, the connection of the torque arm to the track support beam is arranged to be provided by bushings positioned against the track support beam so as to allow limited tipping movement of the torque arm to the track support beam, and thus of the drive unit. This allows the limited tipping movement of the torque arm of the drive unit to be efficiently provided. According to one embodiment of the above-described track assembly, the connection of the torque arm to the track support beam is arranged to be provided by conical bushings at the connection point of the torque arm, where a fastener is provided for connection to the track support beam, and the bushings are configured to be positioned against the track support beam so as to allow limited tipping movement of the torque arm to the track support beam, and thus of the drive unit. In an embodiment of the above-described track assembly, the connection point of the torque arm and the fastener attached to the connection point is further arranged to provide vertical fixation so as to receive a vertical force.

[0017] According to one embodiment of the above-described track assembly, the housing configuration includes a transmission housing for accommodating the transmission unit of the transmission device, and the torque arm is attached to the transmission housing or forms part of the transmission housing. This enables efficient enclosure of the transmission unit and efficient journaling of the transmission device.

[0018] According to one embodiment of the above-described track assembly, the torque arm comprises a rear arm portion configured to be furthest from the transmission housing, and the rear arm portion comprises at least one connection point for connecting to the track support beam, and the torque arm further comprises an intermediate portion configured to provide transmission toward the transmission housing and a front connection portion configured to provide connection to the transmission housing, wherein the front connection portion has an arc-shaped configuration for connecting to a ring-shaped transmission housing, and the front connection portion comprises a set of connection points arranged along the arc for connecting to the transmission housing.

[0019] According to one embodiment of the above-described track assembly, the topology of the torque arm is optimized based on at least one connection point for connecting the rear arm portion of the torque arm to the track support beam and a set of connection points (P226) for connecting the front connection portion of the torque arm to the housing, so that the torque arm is only made of the structural material of the torque arm expected to receive force from the structure.

[0020] Specifically, the objective of the present invention is achieved by a tracked vehicle comprising at least one tracked assembly as described in this specification.

[0021] According to one embodiment, the tracked vehicle comprises a left track assembly, a right track assembly, and a vehicle body, and the track assembly is suspendedly disposed on the vehicle body by a suspension device.

[0022] The above-mentioned tracked vehicle may include one or more tracked vehicle units. According to an embodiment, the above-mentioned tracked vehicle includes more than one tracked vehicle unit, and the vehicle units are articulated with each other.

[0023] According to one embodiment, the tracked vehicle is an articulated tracked vehicle comprising a first vehicle unit and a second vehicle unit pivotably connected to the first vehicle unit through an articulation joint, wherein each of the vehicle units comprises a vehicle body and a pair of track assemblies suspendedly connected to each vehicle body. Brief explanation of the drawing

[0024] A better understanding of the present invention may be achieved by referring to the following detailed description in conjunction with the accompanying drawings, wherein similar reference characters refer to parts similar in various respects: FIG. 1a schematically illustrates a side view of a tracked vehicle including a track assembly according to one embodiment of the present disclosure. FIG. 1b schematically illustrates a side view of an articulated tracked vehicle including a track assembly according to one embodiment of the present disclosure. FIG. 2 schematically illustrates a plan view of a tracked vehicle having track assemblies including a driving device according to one embodiment of the present disclosure. FIG. 3a schematically illustrates a perspective view of a pair of track assemblies of a tracked vehicle according to an embodiment of the present invention. FIG. 3b schematically illustrates a side view of the track assembly of FIG. 3a. FIG. 4a schematically illustrates a side view of a driving device for a track assembly according to one embodiment of the present disclosure. FIG. 4b schematically illustrates a side view of the drive device of FIG. 4a, which is connected to the track support beam of a track assembly and is equipped with a drive wheel member, according to one embodiment of the present disclosure. FIG. 5 schematically illustrates a perspective view of a driving device connected to a track support beam of a track assembly and equipped with a driving wheel member according to one embodiment of the present disclosure. FIG. 6 schematically illustrates a cross-sectional view of the driving device of FIG. 5, which is connected to the track support beam of a track assembly and is equipped with a driving wheel member, according to one embodiment of the present disclosure. FIG. 7 schematically illustrates a cross-sectional view of a driving unit of the driving device of FIG. 6 according to one embodiment of the present disclosure. FIG. 8 schematically illustrates a plan view of a portion of a track assembly including a drive unit having a torque arm according to one embodiment of the present disclosure. FIG. 9 schematically illustrates a perspective view of a torque arm of a driving unit according to one embodiment of the present disclosure. FIG. 10a schematically illustrates a side view of a torque arm of a driving unit attached to an track support beam according to one embodiment of the present disclosure. FIG. 10b schematically illustrates a cross-sectional view of an orbital support beam connected to the torque arm of FIG. 10a according to one embodiment of the present disclosure. Specific details for implementing the invention

[0025] In the following, the term “track support beam” refers to a structural element positioned to support, for example, ground-interlocking means, for example, endless tracks, as well as drive wheel members and road wheels.

[0026] In the following, the term “track assembly” refers to a unit of a tracked vehicle comprising a track support beam, a drive wheel member and a road wheel, as well as a surrounding endless track, which is arranged to include ground-engaging means and configured to propel the vehicle and thus forms at least part of the drive configuration of the tracked vehicle.

[0027] In the following, the term "track assembly pair" refers to opposing track assemblies of the vehicle unit, where one track assembly constitutes the right track assembly and the opposite track assembly constitutes the left track assembly.

[0028] In the following description, the term "articulated vehicle" refers to a vehicle having at least front and rear vehicle units, wherein these vehicle units can pivot relative to each other around at least one joint.

[0029] In the following description, the term "body" refers to any structure of a vehicle configured to be supported by the track assembly of a tracked vehicle, and may include or constitute a vehicle chassis. The term "body" may refer to a vehicle frame, one or more beams, etc. The term "body" may refer to the chassis and bodywork of a vehicle.

[0030] In the following, the term "central axis" refers to the axis on which the drive wheel member of the track assembly is configured to rotate around the central axis, and thus means an axis that extends in the transverse direction of the endless track of the track assembly and is perpendicular to the longitudinal direction.

[0031] FIG. 1a schematically illustrates a side view of a tracked vehicle (V) according to one embodiment of the present disclosure.

[0032] A tracked vehicle (V) includes a vehicle body (B), which, according to one aspect of the present disclosure, includes a chassis and bodywork of the vehicle (V).

[0033] A tracked vehicle (V) comprises a left track assembly (T1) and a right track assembly for driving the vehicle (V), wherein the left track assembly (T1) is illustrated in FIG. 1a. Each track assembly comprises a drive wheel member (DW), a tension wheel (TW), a set of road wheels (RW), and an endless track (E) arranged to run over said wheels. The endless track (E) is thus arranged to be positioned around said wheels. Here, the drive wheel member (DW) is positioned at the front, the tension wheel (TW) is positioned at the rear, and the road wheels (RW) are positioned between the drive wheel member (DW) and the tension wheel (TW). However, a tracked vehicle according to the present disclosure may have track assemblies having any suitable arrangement structure of the drive wheel member, the tension wheel, and the road wheels. According to one aspect of the present disclosure, the tension wheel may be positioned at the front, the drive wheel member at the rear, and the road wheels may be positioned between them.

[0034] The endless track (E) of each track assembly is arranged to be driven by the drive wheel member (DW) and thus rotate. Each track assembly (T1) of the track vehicle (V) includes a drive unit (D) for operating the drive wheel member (DW) and thus driving it. The drive unit (D) is configured to be positioned coaxially with respect to the drive wheel member (DW).

[0035] FIG. 1b schematically illustrates a side view of a tracked vehicle (V1) according to one embodiment of the present disclosure.

[0036] The above-described tracked vehicle (V1) is an articulated tracked vehicle (V1) comprising a first vehicle unit (V1a) and a second vehicle unit (V1b) pivotally connected to the first vehicle unit (V1a) through an articulation joint (Y). Each of the vehicle units (V1a, V1b) comprises a vehicle body (B) and a pair of track assemblies (T1) suspendedly connected to the vehicle body (B), and the left track assembly (T1) of each vehicle unit (V1a, V1b) is illustrated.

[0037] Each track assembly comprises a drive wheel member (DW), a tension wheel (TW), a set of road wheels (RW), and an endless track (E) arranged to run over the wheels. The endless track (E) is thus arranged to be positioned around the wheels. Here, the drive wheel member (DW) is positioned at the front, the tension wheel (TW) is positioned at the rear, and the road wheels (RW) are positioned between the drive wheel member (DW) and the tension wheel (TW).

[0038] The endless track (E) of each track assembly of each vehicle unit (V1a, V1b) of the above-mentioned track vehicle (V1) is arranged to be driven by a drive wheel member (DW) and thus rotate. Each track assembly (T1) of the vehicle units (V1a, V1b) of the above-mentioned track vehicle (V1) may include a drive device (D) for operating and thus driving the drive wheel member (DW). The drive device (D) is configured to be positioned coaxially with respect to the drive wheel member (DW).

[0039] FIG. 2 schematically illustrates a plan view of the tracked vehicle V of FIG. 1a according to one embodiment of the present disclosure. FIG. 3a schematically illustrates a perspective view of a pair of track assemblies (T1, T2) of the tracked vehicle, and FIG. 3b schematically illustrates a side view of the left track assembly (T1) of FIG. 3a.

[0040] A tracked vehicle (V) includes a left track assembly (T1), a right track assembly (T2), and a vehicle body (B). The left and right track assemblies (T1, T2) provide a pair of track assemblies (T1, T2). Accordingly, the tracked vehicle (V) is configured to include a pair of track assemblies (T1, T2) arranged to support the vehicle body (B) in a suspended manner to enable relative movement between the vehicle body (B) and each of the track assemblies (T1, T2).

[0041] The above track assemblies (T1, T2) are suspended from the vehicle body by a suspension device (S1, S2) (see, for example, FIG. 3a). The suspension device according to the present disclosure may be any suitable suspension device for supporting the vehicle body in a suspended manner.

[0042] The left and right track assemblies (T1, T2) of the above track assembly pair (T1, T2) include a track support beam (10) configured to support a plurality of road wheels (not shown in FIG. 2) not shown in FIG. 1, a drive wheel member (DW), and a drive device (D) for operating the drive wheel member (DW). The left track assembly (T1) includes a track support beam (10) configured to support a plurality of road wheels, a drive wheel member (DW), and a drive device (D). The right track assembly (T2) includes a track support beam (10) configured to support a plurality of road wheels, a drive wheel member (DW), and a drive device (D). The left and right track assemblies (T1, T2) of the above track assembly pair (T1, T2) include an endless track (E) disposed around the road wheels and the drive wheel member (DW).

[0043] According to one aspect of the present disclosure, for example, as illustrated in FIG. 3a, the suspension system (S1, S2) has a leaf spring configuration. The suspension system (S1, S2) according to the embodiment illustrated in FIG. 3a has.

[0044] According to one embodiment of the present disclosure, the suspension device (S1, S2) comprises a front leaf spring element (S1) arranged transversely with respect to the longitudinal extension of the track vehicle (V) at the front portion of the vehicle between the left track assembly (T1) and the right track assembly (T2). The front leaf spring element (S1) is positioned between the left and right track assemblies (T1, T2) with respect to the track support beam (10) of each track assembly (T1, T2). The front leaf spring element (S1) is connected to the track support beam (10) of the left track assembly (T1) at a first end and to the track support beam (10) of the right track assembly at the opposite second end. The first end of the front leaf spring element (S1) is connected to the front portion of the track support beam (10) of the left track assembly (T1) with respect to the drive unit (D) and drive wheel member of the left track assembly (T1). The second end of the front leaf spring element (S1) is connected to the front portion of the track support beam (10) of the right track assembly (T2) with respect to the drive device and drive wheel member of the right track assembly (T1).

[0045] According to one embodiment of the present disclosure, the front leaf spring element (S1) has a U-shaped configuration (S1A) having a double bending portion / transition portion configured to be positioned on each side of the vehicle body and a lower portion configured to extend from below the vehicle body, the vehicle body is not illustrated in FIG. 3a. The front leaf spring element (S1) includes a first attachment member (S1-1) positioned on the first bending portion and a second attachment member (S1-2) positioned on the second bending portion opposite to the U-shaped configuration (S1A). The first attachment member (S1-1) and the second attachment member (S1-2) are configured to provide attachment to the vehicle body (not illustrated in FIG. 3a). The U-shaped configuration (S1A) is further configured to protrude laterally from each side of the vehicle body and is attached to the track support beam (10) of the left and right track assemblies (T1, T2).

[0046] According to one embodiment of the present disclosure, the suspension device (S1, S2) includes a rear leaf spring element (S2) that is positioned transversely to the longitudinal extension of the track vehicle (V) at the front portion of the vehicle between the left track assembly (T1) and the right track assembly (T2). The rear leaf spring element (S2) is positioned between the left and right track assemblies (T1, T2) with respect to the track support beam (10) of each track assembly (T1, T2). The rear leaf spring element (S2) is connected at a first end to the rear portion of the track support beam (10) of the left track assembly (T1) and at a second end opposite to the rear portion of the track support beam (10) of the right track assembly.

[0047] According to one embodiment of the present disclosure, the rear leaf spring element (S2) has a U-shaped configuration (S2A) having a double bending portion configured to be positioned on each side of the vehicle body and a lower portion configured to extend from below the vehicle body, the vehicle body is not illustrated in FIG. 3a. The rear leaf spring element (S2) includes a first attachment member (S2-1) positioned on the first bending portion and a second attachment member (S2-2) positioned on the second bending portion opposite to the U-shaped configuration (S2A). The first attachment member (S2-1) and the second attachment member (S2-2) are configured to provide attachment to the vehicle body (not illustrated in FIG. 3a). The U-shaped configuration (S2A) is further configured to protrude laterally from each side of the vehicle body and is attached to the track support beam (10) of the left and right track assemblies (T1, T2).

[0048] According to one aspect of the present disclosure not illustrated, the suspension device may include a leaf spring device having portions arranged transversely with respect to a longitudinal extension of the vehicle, wherein the leaf spring device includes L-shaped leaf spring members, each leaf spring member having a first portion attached to the vehicle body, a second portion attached to a track support beam, and a transition portion between the two, such that compressive stress and tensile stress are located in the transition portion.

[0049] The drive wheel member (DW) is configured to rotate about a central axis (Z). The drive device (D) of each track assembly (T1, T2) is configured to be arranged coaxially with respect to the central axis (Z) of the drive wheel member (DW). The drive device (D) of each track assembly (T1, T2) has a main extension direction that is essentially orthogonal to the longitudinal direction of the endless track and essentially parallel to the transverse direction of the endless track (E).

[0050] The drive unit (D) of each track assembly (T1, T2) includes a motor unit (100) for driving the drive wheel member (DW), a transmission unit (200) for transmitting torque from the motor unit (100) to the drive wheel member (DW), and a brake unit (300) for braking the drive wheel member (DW). The motor unit (100) may include an electric motor or a hydraulic motor. The motor unit (100) is described in more detail.

[0051] As schematically illustrated in FIG. 2, the drive unit (D) of each track assembly (T1, T2) may be operably connected to a power supply unit (400) for providing power to operate the drive unit (D) of each track assembly (T1, T2). The power supply unit (400) may be any suitable power supply unit for supplying power to the drive unit (D), that is, for supplying power to the motor unit (100) of the drive unit (D).

[0052] According to one embodiment of the present disclosure, the power supply unit (400) may include an internal combustion engine. According to one embodiment of the present disclosure, the internal combustion engine may be composed of a diesel engine.

[0053] According to an alternative embodiment of the present disclosure, the power supply unit (400) may include an energy supply unit such as a battery supply unit and / or a fuel cell unit, for example, a hydrogen fuel cell.

[0054] According to one aspect of the present disclosure, the power supply unit (400) may include one or more generator units for generating high voltage. For example, one or more control units, e.g., electronic control units, are provided to control each driving unit (D), and the one or more control units include one or more control units configured to receive high voltage from the generator unit and transmit said high voltage as a driving voltage, i.e., an alternating voltage, for the motor unit (100) of said driving unit (D). According to one aspect of the present disclosure, the power supply unit (400) is configured to provide a DC bus configured to distribute power, i.e., voltage, to each driving unit (D), e.g.

[0055] For example, in the case of a tracked vehicle of the form of an articulated tracked vehicle having a front vehicle unit and a rear vehicle unit as shown in FIG. 1b, such power supply unit (400) may be placed in the front vehicle unit or the rear vehicle unit, or in both the front vehicle unit and the rear vehicle unit.

[0056] FIG. 4a schematically illustrates a side view of the driving device (D), and FIG. 4b schematically illustrates a side view of the driving device (D) supported by the track support beam (10) according to one embodiment of the present disclosure.

[0057] As shown in FIG. 4b, the drive unit (D) is journaled in a bearing for the track support beam (10). As shown in FIG. 4b, the drive unit (D) operably supports the drive wheel member (DW).

[0058] FIG. 5 schematically illustrates a perspective view of the drive device (D) journaled with bearings on the track support beam (10) that operably supports the drive wheel member (DW).

[0059] Accordingly, the drive device (D) is configured to journal to the bearings of the track support beam (10) to enable rotation of the drive wheel member (DW) relative to the track support beam (10) and to support the drive device (D).

[0060] As illustrated in FIGS. 2 and 5, the track support beam (10) has an outer surface (10a) configured to face away from the vehicle body (B) when the track assembly is connected to the vehicle body (B), and an opposite inner surface (10b) configured to face toward the vehicle body. Here, when referring to the track support beam (10) having an outer surface (10a) configured to face away from the vehicle body (B) when the track assembly is connected to the vehicle body (B) and an opposite inner surface (10b) configured to face toward the vehicle body, it refers to a part of the vehicle body (B), e.g., a vehicle chassis, positioned between the right and left track assemblies, and thus between the right and left drive wheel members. Accordingly, the track support beam (10) has an outer surface (10a) that faces outward away from the opposite track assembly in the transverse direction of the vehicle (V) and in the transverse direction with respect to its longitudinal extension, and an inner surface (10b) that faces inward toward the opposite track assembly in the transverse direction of the vehicle (V) and in the transverse direction with respect to its longitudinal extension.

[0061] As schematically illustrated in FIG. 2, the outer surface (10a) of the track support beam (10) of the left track assembly (T1) of the track vehicle (V) is configured to face away from the right track assembly (T2) of the track vehicle (V). As schematically illustrated in FIG. 2, the outer surface (10a) of the track support beam (10) of the right track assembly (T2) of the track vehicle (V) is configured to face away from the left track assembly (T1) of the track vehicle (V).

[0062] As schematically illustrated in FIG. 2, the inner surface (10b) of the track support beam (10) of the left track assembly (T1) of the track vehicle (V) is configured to face the right track assembly (T2) of the track vehicle (V). As schematically illustrated in FIG. 2, the inner surface (10b) of the track support beam (10) of the right track assembly (T2) of the track vehicle (V) is configured to face the left track assembly (T1) of the track vehicle (V).

[0063] The above drive wheel member (DW) includes an outer drive wheel (DW1) positioned on the outer surface of the track support beam (10) and an inner drive wheel (DW2) positioned on the inner surface of the track support beam (10).

[0064] FIG. 6 schematically illustrates a cross-sectional view of the drive device (D) supported by the track support beam (10) according to one embodiment of the present disclosure. The cross-section is axial, i.e., in the Z-axis direction. The drive device (D) is journaled to a bearing for the track support beam (10).

[0065] The above-described drive unit (D) includes a drive axle (40) for driving the drive wheel member (DW). The drive wheel member (DW) is configured to be operably connected to the drive axle (40). According to one embodiment of the present disclosure, the drive wheel member (DW) is configured to be connected to the drive axle (40) by a spline connection.

[0066] A track assembly for each drive unit (D) includes a bearing configuration (20) disposed on the track support beam (10) to provide a bearing for the drive unit (D). According to one embodiment of the present disclosure, the track support beam (10) has a front portion (12) configured to accommodate the bearing configuration (20). According to one embodiment of the present disclosure, the front portion (12) of the track support beam (10) has a through hole (H). The center of the through hole (H) will correspond to a central axis (Z) when the drive unit (D) and the drive wheel member (DW) are connected to the track support beam (10).

[0067] The bearing configuration (20) is configured to be positioned in the through hole (H) of the front portion (12) of the track support beam (10). According to one embodiment of the present disclosure, the bearing configuration (20) is a tapered roller bearing device. According to one embodiment of the present disclosure, the bearing configuration (20) includes a first roller bearing (22) and a second roller bearing (24) on the opposite side. According to one embodiment of the present disclosure, the first roller bearing (22) and the second roller bearing (24) are positioned relative to each other within the through hole (H) of the front portion (12) of the track support beam (10) to optimize the easy tipping torque of the drive device (D). According to one embodiment of the present disclosure, the first roller bearing (22) and the second roller bearing (24) are configured to be positioned relative to each other within the through hole (H) of the front portion (12) of the raceway support beam (10), so that the roller bearings (22, 24) of the bearing configuration (20) have a predetermined pre-tension. According to one embodiment of the present disclosure, the tapered roller bearing device includes the first roller bearing (22) and the opposite second roller bearing (24).

[0068] The drive axle (40) of the drive unit (D) is configured to extend through the through hole (H) of the front portion (12) of the track support beam (10) with respect to the bearing configuration (20). According to one embodiment of the present disclosure, the drive axle (40) is configured to be connected to the bearing configuration (20) by a spline connection so that the drive axle (40) can rotate with respect to the track support beam (10).

[0069] The drive axle (40) of the drive unit (D) is configured to extend through the through hole (H) of the front portion (12) of the track support beam (10), so that a portion (40a) of the drive axle (40) protrudes axially from the through hole with respect to the outer surface (10a) of the track support beam (10). According to one embodiment of the present disclosure, the outer drive wheel (DW1) is configured to be attached to the portion of the drive axle (40) that protrudes axially from the outer surface of the track support beam (10).

[0070] The drive axle (40) of the drive unit (D) is configured to extend through the through hole (H) of the front portion (12) of the track support beam (10), so that a portion (40b) of the drive axle (40) is configured to protrude axially from the through hole with respect to the inner surface (10b) of the track support beam (10). According to one embodiment of the present disclosure, the inner drive wheel (DW2) is configured to be attached to the portion of the drive axle (40) that protrudes axially from the inner surface of the track support beam (10).

[0071] According to one embodiment of the present disclosure, the drive axle (40) extends laterally with respect to the longitudinal extension of the track support beam (10) through the through hole (H). According to one embodiment of the present disclosure, the drive axle (40) has a transverse extension having a central portion (40c) configured to be connected to the bearing configuration for journaling in the bearing within the front portion (12) of the track support beam (10) and disposed in the through hole.

[0072] According to one embodiment of the present disclosure, the drive axle (40) having the transverse extension having the central portion (40c) has an outer extension (40a) configured to protrude axially outward from the track support beam into the brake device (300). The drive axle (40) having the transverse extension having the central portion (40c) has an inner extension (40b) configured to protrude axially inward from the track support beam into the transmission device (200).

[0073] Accordingly, according to one embodiment of the present disclosure, the bearing configuration (20) is positioned in the center between the outer drive wheel (DW1) and the inner drive wheel (DW2) in the through hole (H) of the track support beam (10).

[0074] The outer drive wheel (DW1) and the inner drive wheel (DW2) are arranged coaxially with respect to each other at a certain distance along the axis (Z) from each other, and the front portion (12) of the track support beam is positioned between the outer drive wheel (DW1) and the inner drive wheel (DW2) such that the through hole (H) is positioned between the outer drive wheel (DW1) and the inner drive wheel (DW2) coaxially with the axis (Z).

[0075] According to one embodiment of the present disclosure, the drive device (D) is supported between the outer drive wheel (DW1) and the inner drive wheel (DW2) in the through hole (H) of the outer portion (12) of the track support beam (10). The drive axle (40) of the drive device (D) is supported between the outer drive wheel (DW1) and the inner drive wheel (DW2) in the through hole (H) of the outer portion (12) of the track support beam (10).

[0076] According to one embodiment of the present disclosure, the drive device (D) is supported between the outer drive wheel (DW1) and the inner drive wheel (DW2) in the through hole (H) of the outer portion (12) of the track support beam (10) by supporting the drive axle (40) of the drive device (D) with the bearing configuration (20). Accordingly, the bearing configuration (20) is positioned within the through hole (H) of the track support beam (10) at the center between the outer drive wheel (DW1) and the inner drive wheel (DW2).

[0077] As described above, the driving device (D) includes a motor device (100) for driving the driving wheel member (DW), a transmission device (200) for transmitting torque from the motor device (100) to the driving wheel member (DW), and a brake device (300) for braking the driving wheel member (DW).

[0078] According to one embodiment of the present disclosure, the brake device (300) is configured to be positioned on the outer surface (10a) of the track support beam (10).

[0079] According to one aspect of the present disclosure, the transmission device (200) is configured to be positioned on the inner side (10b) of the track support beam (10), and the motor device (100) is configured to be internally positioned with respect to the transmission device (200) such that the transmission device (200) is positioned between the motor device (100) and the brake device (300).

[0080] The motor device (100) may include an electric motor or a hydraulic motor. The motor device (100) includes a motor housing (110) for accommodating parts associated with the motor device (100). The motor device (100) includes a motor (120) for driving. The motor (120) is configured to be accommodated in the housing (110).

[0081] According to one aspect of the present disclosure, the motor comprises a stator configured to be fixedly connected to the motor housing (110) of the motor (100), and a rotor (120b) that provides rotational movement of the motor axle relative to the stator.

[0082] According to one aspect of the present disclosure, a power supply device, for example, a power supply device (400) schematically illustrated in FIG. 2, may be configured to provide power for the motor device (100), that is, for operating the rotor (120a) of the motor (120), and thus the motor axle (140).

[0083] The motor device includes a bearing configuration (B100) disposed in the motor housing (110) of the motor device (100) to provide a bearing for the motor axle (140). According to one aspect of the present disclosure, the bearing configuration (B100) is a deep groove ball bearing device. According to one aspect of the present disclosure, the motor axle (140) is configured to be connected to the bearing configuration (B100) by a spline connection so that the motor axle (140) can rotate relative to the motor housing (110).

[0084] According to one aspect of the present disclosure, the motor axle (140) is configured to be operably connected to the transmission device (200) to transmit torque from the motor axle (140) to the drive axle (40).

[0085] According to one aspect of the present disclosure, the transmission device (200) includes a transmission housing (210) for accommodating parts associated with the transmission device (200).

[0086] According to one aspect of the present disclosure, the transmission device (200) includes a gear device (260). The gear device (260) may be any suitable gear device for transmitting torque from a motor device (100) to a drive wheel member (DW) to drive a track assembly, and thus to drive a tracked vehicle having said track assembly.

[0087] According to one aspect of the present disclosure, the gear device (260) may include a first planetary gear configuration (262). This first planetary gear configuration (262) may include a high / low planetary gear member configured to provide a high gear position in relation to torque transmission from the motor device (100). According to one aspect of the present disclosure, the gear device (260) may include a second planetary gear configuration (264). This second planetary gear configuration (264) may include a planetary gear set for providing a gear change of the drive wheel member in relation to transmitting torque from the first planetary gear configuration (262) to the drive wheel member (DW). The first planetary gear configuration (262) is configured to provide a high gear position associated with transmitting torque to the second planetary gear configuration (264) without providing a change in speed from the motor (100), and a low gear position configured to reduce the speed of the motor associated with transmitting torque to the second planetary gear configuration (264).

[0088] The transmission unit (200) includes a bearing configuration (B260) arranged to provide a bearing for the gear unit (260) (see FIG. 6). The first planetary gear configuration (262) includes a first bearing configuration (B262). According to one aspect of the present disclosure, the first bearing configuration (B262) is a needle roller bearing unit. The second planetary gear configuration (262) includes a second bearing configuration (B264). According to one aspect of the present disclosure, the second bearing configuration (B264) is a needle roller bearing unit (see FIG. 7).

[0089] The transmission device (200) is configured to transmit the torque from the motor device (100) to the drive wheel member (DW) through the drive axle (40) by the gear device (260).

[0090] According to one aspect of the present disclosure, the drive axle (40) is configured to extend from the transmission device through the inner drive wheel (DW2), through the through hole (H) of the track support beam (10) in relation to the bearing configuration (20), through the outer drive wheel (DW1), and additionally through the main part of the brake device (300).

[0091] According to one aspect of the present disclosure, the motor device (100) and the transmission device (200) are included in a driving unit (M). Accordingly, the driving device (D) includes a driving unit (M) that includes the motor device (100) and the transmission device (200). Accordingly, the driving unit (M) of the motor device (100) and the transmission device (200) of the driving device (D) is provided. The driving unit (M) includes a housing configuration (M10). The housing configuration (M10) includes the motor housing (110) and the transmission housing (210).

[0092] According to one aspect of the present disclosure, the drive unit (M) is configured to pivotally journal to a bearing with respect to a portion of the drive axle (40) configured to protrude axially from the inner surface (10b) of the track support beam (10) in order to allow rotation of the drive axle (40) with respect to the housing configuration (M10) of the drive unit (M). A bearing configuration (B200) is configured to be positioned around the portion of the drive axle (40) configured to protrude axially from the inner surface (10b) of the track support beam (10).

[0093] According to one aspect of the present disclosure, the driving device (D) comprises a bearing configuration (B200) disposed in the housing configuration of the driving unit (M) with respect to the transmission housing (210) to provide a bearing of the driving unit (M). According to one aspect of the present disclosure, the bearing configuration (B200) is a tapered roller bearing device.

[0094] According to one aspect of the present disclosure, a drive axle (40) is configured to be connected to a bearing configuration (B200) by a spline connection so that the drive axle (40) can rotate with respect to the housing configuration, i.e., the transmission housing (210).

[0095] According to one embodiment of the present disclosure, a driving device (D) includes a central support bar (30) arranged coaxially within the driving device (D). The central support bar (30) is configured to extend in an axial direction, that is, in the Z-axis direction. The central support bar (30) is configured to extend transversely with respect to a longitudinal extension of the track support beam (10).

[0096] The central support bar (30) is configured to support and connect the transmission device (200) and the brake device (300). The central support bar (30) is configured to support and connect the drive unit (M) and the brake device (300).

[0097] The above center support bar (30) is configured to be coaxial with the center axis (Z) of the drive wheel member (DW).

[0098] The central support bar (30) is configured to extend through the drive axle (40) to provide the connection between the transmission device (200) and the brake device (300). The central support bar (30) is configured to extend through the drive axle (40) to provide the connection between the drive unit (M) and the brake device (300).

[0099] Accordingly, the drive axle (40) has a tube configuration. Accordingly, the drive axle (40) has a tube shape that provides a through hole for the central support bar (30). Accordingly, the drive axle (40) has a tube configuration configured to accommodate the central support bar (30). The drive axle (40) has a hollow configuration to enable the introduction of the central support bar (30) into the drive axle (40).

[0100] The drive unit (M) includes a torque arm (220) (e.g., see FIGS. 5, 8, 9, 10a and 10b). The transmission device (200) of the drive unit (M) includes a torque arm (220) (e.g., see FIGS. 5, 8, 9, 10a and 10b). The transmission device (200) of the drive unit (D) includes a torque arm (220) (e.g., see FIGS. 5, 8, 9, 10a and 10b).

[0101] FIG. 8 schematically illustrates a plan view of a portion of a track assembly (T1) comprising a drive unit (M) having a torque arm (220) according to one embodiment of the present disclosure. FIG. 9 schematically illustrates a perspective view of the torque arm (220) of the drive unit according to one embodiment of the present disclosure. FIG. 10a schematically illustrates a side view of the torque arm (220) of the drive unit attached to a track support beam (10) according to one embodiment of the present disclosure. FIG. 10b schematically illustrates a cross-sectional view of the track support beam connected to the torque arm (220) of FIG. 10a.

[0102] The torque arm (220) is configured to provide torque resistance to the rotation of the drive axle (40).

[0103] The torque arm (220) is configured to be connected to the track support beam (10) so as to essentially prevent rotation of the transmission device (200) around the central axis (Z). The torque arm (220) is configured to be attached to the transmission housing (210) or to form a part thereof. The torque arm (220) is configured to be connected to the track support beam (10) so as to essentially prevent rotation of the transmission housing (210) around the central axis (Z).

[0104] The torque arm (220) is configured to be connected to the track support beam (10), so that the torque arm (220) acts on the track support beam (10) with respect to the center of the journaling in the bearings of the drive wheel member (DW) to limit the tipping torque of the torque arm (220).

[0105] According to one embodiment of the present disclosure, the torque arm (220) is configured to be attached to a portion of the transmission housing (210) facing the rear direction of the tracked vehicle when the drive unit (M), and thus the transmission device (200), is assembled to the tracked assembly. According to one embodiment of the present disclosure, the torque arm (220) is configured to be attached to the transmission housing (210) so as to protrude rearward along the tracked support beam (10) (see, for example, FIG. 5 and FIG. 9).

[0106] According to one embodiment of the present disclosure, the torque arm (220) has a rear surface (220a) oriented away from the transmission housing (210) and configured to be attached to the track support beam (10) (see, for example, FIG. 5, 8 and 9). According to one embodiment of the present disclosure, the torque arm (220) has a front surface (220b) oriented toward the transmission housing (210) and configured to be attached to the transmission housing (210) (see, for example, FIG. 5, 8 and 9).

[0107] According to one embodiment of the present disclosure, the torque arm (220) has an upper surface (220c) configured to face upward and an opposite lower surface (220d) when the brake device is assembled to a track assembly of a tracked vehicle that is essentially horizontal to the ground (see, for example, FIG. 9).

[0108] According to one embodiment of the present disclosure, the torque arm (220) has an outer surface (220e) configured to face outward toward the inner surface (10b) of the track support beam (10) when the brake device is assembled to the track assembly of the tracked vehicle, and an opposite inner surface (220f) configured to face away from the track support beam (10) (see, for example, FIG. 8 and FIG. 9).

[0109] According to one embodiment of the present disclosure, the torque arm (220) has a rear arm portion (222) configured to be further away from the transmission housing (210) (see, for example, FIG. 8 and 9). The rear arm portion is configured to be attached to the track support beam (10). The rear arm portion (222) includes at least one connection portion (P222) for connection to the track support beam (10). According to one embodiment, the rear arm portion (222) is connected at the connection point (P222) by a fastener (F222) identical to that of the suspension device (S1). The suspension device (S1) may be as follows.

[0110] According to one aspect of the present disclosure, the torque arm (220) has an intermediate portion (224) configured to provide transmission toward the transmission housing (210).

[0111] According to one aspect of the present disclosure, the torque arm (220) has a forward connecting portion (226) configured to provide a connection to the transmission housing (210) (see FIG. 5, 8, 9, 10a and 10b). The forward connecting portion (226) has an arc-shaped configuration for connecting to the ring-shaped transmission housing (210). The forward connecting portion (226) includes a set of connecting points (P226) arranged along the arc for connecting to the transmission housing.

[0112] According to one aspect of the present disclosure, the connection of the torque arm (220) to the track support beam (10) is arranged to be provided by bushings disposed with respect to the track support beam (10), thereby allowing limited tipping movement of the torque arm (220) and thus the drive unit (M) to the track support beam (10). According to one aspect of the present disclosure, the connection of the torque arm (220) to the track support beam (10) is arranged to be provided by conical bushings (B222-1, B222-2) at the connection point (P222) of the torque arm (222) to which a fastener (F222) is provided for the connection to the track support beam (10), and the bushings (B222-1, B222-2) are arranged with respect to the track support beam (10) such that a limited tipping movement of the torque arm (220) to the track support beam (10) is allowed. According to one embodiment of the present disclosure, the connection point (F222) of the rear arm portion (222) comprises two conical bushings (B222-1, B222-2) arranged to facilitate limited tipping movement of the torque arm (220) relative to the track support beam (10) when the rear arm portion (222) is attached by the fastener (F222) (see FIG. 10b). According to one embodiment of the present disclosure, the connection point (F222) and the fastener attached to the connection point (F222) are further arranged to provide a vertical fixation to take up a vertical force.

[0113] The torque arm (222) is configured to be attached to the track support beam (10) at the connection point (P222) by the fastener (F222) at the rear arm portion (222) in order to prevent rotation of the transmission housing (210) by hindering the movement of the torque arm (220) relative to the track support beam (10) in the vertical direction of the endless track (E), thereby preventing rotation of the transmission housing (210).

[0114] According to one aspect of the present disclosure, the topology of the torque arm (220) is optimized based on one or more connection points for connecting the torque arm (220) to an orbital support beam (10) and one or more connection points for connecting the torque arm (220) to a housing (210), so that only the structural material of the torque arm (220) where the torque arm (220) is expected to receive force from the structure exists.

[0115] According to one aspect of the present disclosure, the torque arm (220) is optimized in topology based on at least one connection point (F222) for connecting the rear arm portion (222) of the torque arm (220) to the track support beam (10) and a set of connection points (P226) for connecting the front connection portion (226) of the torque arm (220) to the housing (210), so that only the structural material of the torque arm (220) is expected to receive force from the structure exists. Thus, the middle portion (224) of the torque arm (220) is provided with a first recess (O224a) located in the upper portion of the middle portion (224) and a second recess (O224b) located in the middle / lower portion of the middle portion (224). The recesses (O224a, O224b) are openings in the shape of through holes.

[0116] The brake device (300) includes a torque arm (320) (see, for example, FIG. 5 and FIG. 8). The torque arm (320) is configured to be connected to the track support beam (10) to essentially prevent rotation of the brake device (300) around the central axis (Z). The torque arm (320) is configured to be attached to or form a part of the brake housing (310). The torque arm (320) is configured to be connected to the track support beam (10) to essentially prevent rotation of the brake housing (310) around the central axis (Z).

[0117] According to one embodiment of the present disclosure, the torque arm (320) is configured to be attached to the rear portion of the brake housing (310). According to one embodiment of the present disclosure, the torque arm (320) is configured to be attached to a portion of the brake housing (310) facing the rear of the tracked vehicle when the brake device is assembled to the tracked assembly. According to one embodiment of the present disclosure, the torque arm (320) is configured to be attached to the brake housing (310) so as to protrude in a rearward direction along the outer surface (10a) of the tracked support beam (10) (see, for example, FIG. 5 and FIG. 8).

[0118] According to one aspect of the present disclosure, the torque arm (320) has an outer surface configured to face away from the track support beam (10) when the brake device is assembled to the track assembly of the track vehicle, and an opposite outer surface configured to face toward the track support beam (10).

[0119] The torque arm (320) is configured to provide torque resistance in relation to the braking action of the brake device (300) on the drive axle (40). The torque arm (320) is configured to be connected to the track support beam (10) to provide torque resistance in relation to the braking action of the brake device (300) on the drive axle (40).

[0120] According to one embodiment of the present disclosure, the torque arm (320) is configured to be movably connected to the track support beam (10), so that movement of the torque arm (320) relative to the track support beam (10), and thus movement of the brake device (300), is longitudinal movement of the endless track (E). According to one embodiment of the present disclosure, the torque arm (320) is configured to be movably connected to the track support beam (10), so that movement of the torque arm (320) relative to the track support beam (10), and thus movement of the brake device (300), is longitudinal movement of the track support beam (10).

[0121] According to one embodiment of the present disclosure, the torque arm (320) is configured to be connected to the track support beam (10) by a pin member (10P) between the torque arm (320) and the track support beam (10). According to one embodiment of the present disclosure, the pin member (10P) is configured to be connected to the track support beam (10) by a fastener (F10P). According to one embodiment of the present disclosure, the pin member (10P) is configured to provide an extension of the suspension device (S1) directed toward the torque arm (320). According to one embodiment of the present disclosure, the pin member (10P) is configured to be connected to the track support beam (10) in proximity to a connection point (P222) of the torque arm (220).

[0122] According to one embodiment of the present disclosure, the pin member (10P) is configured such that one end is fixedly attached to the track support beam (10) and the opposite end is connected to the torque arm (320), thereby facilitating the movement of the torque arm (320) relative to the track support beam (10) in the longitudinal direction of the endless track (E), and thus the movement of the brake device (300) in the vertical direction is hindered, i.e., essentially prevented.

[0123] The foregoing description of preferred embodiments of the present invention is provided for illustrative and illustrative purposes only. It is not intended to limit or exhaust the present invention in the exact form disclosed. Clearly, many modifications and variations will be obvious to those skilled in the art. The embodiments have been selected and described to best illustrate the principles of the present invention and their practical applications, thereby enabling those skilled in the art to understand the present invention with respect to various embodiments and various modifications suitable for the specific use being considered.

Claims

Claim 1 A track assembly for a tracked vehicle (V), wherein the track assembly is configured to be connected to the vehicle body (B) of the vehicle, and the track assembly includes a track support beam (10) configured to support a plurality of road wheels (RW), a drive wheel member (DW), and a drive device (D) for operating the drive wheel member (DW), wherein the drive wheel member (DW) is configured to rotate about a central axis (Z), and an endless track (E) is arranged around the road wheels (RW) and the drive wheel member (DW), and the drive device (D) includes a drive unit (M) for driving the drive wheel member (DW), and the drive device (D) includes a drive axle (40) configured to be arranged coaxially with respect to the central axis (Z) of the drive wheel member (DW) to rotate the drive wheel member (DW), and the drive unit (M) is configured to journal with a bearing on a part of the drive axle (40) protruding from the drive wheel member (DW), and the drive A track assembly comprising a torque arm (220) configured to be connected to the track support beam (10) so as to essentially prevent rotation of the drive unit (M) around the central axis (Z). Claim 2 A track assembly according to claim 1, wherein the drive axle (40) is configured to be journaled with a bearing on the track support beam (10) to allow rotation of the drive wheel member (DW) relative to the track support beam (10), and the drive axle (40) is configured to extend through the track support beam (10) when the track assembly is connected to the vehicle body (B) and to protrude from the inner surface (10b) of the track support beam (10) configured to face the vehicle body (B), and the drive unit (M) is configured to be journaled with a bearing on a portion of the drive axle (40) protruding from the inner surface (10b) of the track support beam (10) relative to the drive wheel member (DW). Claim 3 In claim 1, the torque arm (220) is configured to provide torque resistance to the rotation of the drive axle (40), forming a track assembly. Claim 4 In paragraph 2, the drive unit (M) comprises a motor device (100) for providing torque to drive the drive wheel member (DW) and a transmission device (200) for transmitting torque from the motor device (100) to the drive wheel member (DW), wherein the transmission device (200) is configured to be positioned with respect to the inner surface (10b) of the track support beam (10), and the inner surface (10b) is configured to face toward the vehicle body (B) when the track assembly is connected to the vehicle body (B), and the motor device (100) is configured to be positioned internally with respect to the transmission device (200) so that the transmission device (200) is positioned between the motor device (100) and the drive wheel member (DW). Claim 5 In paragraph 4, the above-mentioned drive unit (M) comprises a housing configuration (M10), and the above-mentioned torque arm (220) is attached to or forms part of the housing configuration (M10), forming a track assembly. Claim 6 In paragraph 5, the housing configuration (M10) is a track assembly arranged to accommodate the motor unit (120) of the motor device (100) and the transmission unit (260) of the transmission device (200). Claim 7 In claim 6, the torque arm (220) is configured to be connected to the track support beam (10) so that the torque arm (220) acts on the track support beam (10) with respect to the journaling center of the bearing of the drive wheel member in order to limit the tipping torque of the torque arm. Claim 8 A track assembly according to claim 7, wherein the connection of the torque arm (220) to the track support beam (10) is provided by bushings (B222-1, B222-2) disposed with respect to the track support beam (10) so as to allow limited tipping movement of the torque arm (220) to the track support beam (10) and thereby the drive device (M). Claim 9 In claim 7, the housing configuration (M10) comprises a transmission housing (210) for accommodating the transmission unit (260) of the transmission device (200), and the torque arm (220) is attached to or forms part of the transmission housing (210), forming a track assembly. Claim 10 In claim 9, the torque arm (220) comprises a rear arm portion (222) configured to be furthest from the transmission housing (210), the rear arm portion (222) comprises at least one connection point (P222) for connecting to the track support beam (10), the torque arm (220) further comprises an intermediate portion (224) configured to provide transmission toward the transmission housing (210) and a front connection portion (226) configured to provide a connection to the transmission housing (210), the front connection portion (226) having an arc-shaped configuration for the connection to the transmission housing (210), and the front connection portion (226) comprises a set of connection points (P226) arranged along the arc for connecting to the transmission housing, a track assembly. Claim 11 In claim 10, the torque arm (220) is a track assembly in which the topology is optimized based on at least one connection point (P222) for connecting the rear arm portion (222) of the torque arm (220) to the track support beam (10) and a set of connection points (P226) for connecting the front connection portion (226) of the torque arm (220) to the housing (210). Claim 12 A tracked vehicle (V) comprising at least one track assembly (T1, T2) according to any one of claims 1 to 11. Claim 13 In paragraph 12, the tracked vehicle comprises a left track assembly (T1), a right track assembly (T2), and a vehicle body (5), wherein the track assemblies (T1, T2) are suspended from the vehicle body by means of suspension devices (S1, S2), the tracked vehicle (V).

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