Multi-functional baffle and transmission device of working equipment including the baffle

Abstract

A multi-functional baffle and a work equipment transmission device including the multi-functional baffle are provided. In various embodiments, the work equipment transmission device includes a gearbox housing having an outlet port, a sump holding a lubricant reservoir, and a first gear rotatably mounted in the gearbox housing such that a portion of the first gear is below the upper surface of the lubricant reservoir. The multi-functional baffle mounted within the gearbox housing includes a circumferential shroud wall and an integral straw. The integral straw in turn includes a straw body integrally formed with the circumferential shroud wall, an inlet end in fluid communication with the lubricant reservoir, an outlet end in fluid communication with the outlet port, and a lubricant flow passage within the straw body through which lubricant is suctioned from the lubricant reservoir.

Description

Technical Field

[0001] The present disclosure relates to a multi-functional baffle for use within a transmission. Background Art

[0002] Transmissions of motor graders and other work equipment typically include a positively lubricated gear train mounted within a gearbox housing. The gearbox housing may include a sump or "lubricant reservoir" that holds a liquid lubricant. During operation of the work equipment, the liquid lubricant (usually oil) is drawn from the lubricant reservoir through a suction pipe. To further ensure low-friction operation of the transmission gearbox, baffles may be disposed within the gearbox housing around one or more gears or corresponding shafts within the gearbox. When present, the baffles may help maintain proper spacing between the enclosed gear(s), shaft, and adjacent components within the transmission, which can be particularly useful in the environment of a work equipment. Summary of the Invention

[0003] A multi-functional baffle and a transmission of a work equipment (e.g., a vehicle) including the multi-functional baffle are provided. In various embodiments, the transmission of the work equipment includes a gearbox housing having an outlet port, a sump that holds a lubricant reservoir, and a first gear rotatably mounted within the gearbox housing such that a portion of the first gear is below the upper surface of the lubricant reservoir. The multi-functional baffle mounted within the gearbox housing includes a circumferential shroud wall and an integral suction pipe. The integral suction pipe in turn includes a pipe body integrally formed with the circumferential shroud wall, an inlet end in fluid communication with the lubricant reservoir, an outlet end in fluid communication with the outlet port, and a lubricant flow passage within the pipe body through which the lubricant is drawn from the lubricant reservoir.

[0004] In other embodiments, the transmission of the work equipment includes a gearbox housing having an outlet port, a sump within the gearbox housing that serves as a reservoir for holding the lubricant when filled, and a first gear mounted within the gearbox housing for rotation about a first axis. A portion of the first gear is below the upper surface of the lubricant reservoir. A multi-functional baffle is also mounted within the gearbox housing. The multi-functional baffle includes a circumferential shroud wall that extends into the lubricant reservoir and at least partially surrounds the outer periphery of the first gear. An annular end wall partially encloses a first end of the circumferential shroud wall, while an annular cover or fitting is matingly inserted into an opposite second end of the circumferential shroud wall. A tubular sleeve also projects from the annular end wall in an axial direction opposite to the circumferential shroud wall.

[0005] A multi-functional baffle for use within a work equipment transmission is also provided. The work equipment transmission may include a gearbox housing having an outlet port, a sump tank within the gearbox housing and holding a lubricant reservoir when filled with lubricant, and a first gear mounted within the gearbox housing for rotation about a first axis at a position partially below an upper surface of the lubricant reservoir. In one embodiment, the multi-functional baffle includes a circumferential shroud wall that extends into the lubricant reservoir and at least partially surrounds an outer periphery of the first gear when the multi-functional baffle is installed within the work equipment transmission. The multi-functional baffle also includes an integral straw having a straw body integrally formed with the circumferential shroud wall. The integral straw also includes an inlet end that is in fluid communication with the lubricant reservoir and the outlet port, respectively, when the multi-functional baffle is installed within the work equipment transmission. A lubricant flow passage extends from the inlet end to an outlet end within the straw body, and lubricant is suctioned from the lubricant reservoir through the lubricant flow passage.

[0006] Details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features and advantages will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The following disclosure will describe at least one example in conjunction with the following drawings:

[0008] Figure 1 is a perspective view of a work equipment (here a motor grader) including a transmission according to an exemplary embodiment of the present invention, with an embodiment of the multi-functional baffle effectively incorporated into the transmission;

[0009] Figure 2 is a side view of a transmission gearbox including an exemplary multi-functional baffle, as depicted during the lowering of a rear housing member or tail housing member included in the gearbox housing during assembly;

[0010] Figure 3 is a cross-sectional view of a transmission gearbox (partially shown) and an exemplary multi-functional baffle taken along a vertical section through an intermediate portion of the baffle;

[0011] Figure 4 and 5 is an isometric view of a transmission gearbox (partially shown) and a multi-functional baffle, as shown for viewing;

[0012] Figure 6 is a side view of the multi-functional baffle and the gearbox gear train, with the gearbox housing shown as hidden in the view;

[0013] Figure 7 and 8are a rear isometric view and a front isometric view of an exemplary multi-functional baffle, respectively;

[0014] Figure 9 is an exploded view of the multi-functional baffle, which shows (from left to right) a cover, a straw liner, a main baffle body, and an O-ring that may be included in the multi-functional baffle in one embodiment;

[0015] Figure 10 is a cross-sectional view of the outlet end of an integral straw included in the multi-functional baffle, showing the manner in which the outlet end of the straw can be engaged to an outlet port of a gearbox housing (the outlet port includes a screen that is accessible without opening the transmission housing); and

[0016] Figure 11 is a schematic diagram showing the manner in which the cover of the multi-functional baffle can be interchanged with other covers of different sizes so that the multi-functional baffle can be used on the transmission platforms of multiple work equipment (such as vehicles).

[0017] Like reference numerals in the various figures indicate like elements. For simplicity and clarity of illustration, descriptions and details of well-known features and techniques may be omitted to avoid obscuring the examples and non-limiting embodiments of the present invention described in the subsequent detailed description. It should also be understood that, unless otherwise stated, the features or elements shown in the figures are not necessarily drawn to scale. Detailed Description

[0018] Embodiments of the present disclosure are shown in the figures briefly described above. Those skilled in the art can make various modifications to the exemplary embodiments without departing from the scope of the present invention set forth in the appended claims.

[0019] Overview

[0020] As briefly discussed above, the transmission gearbox of a work equipment (such as a vehicle) is typically equipped with a baffle to, for example, reduce wind resistance. Such a baffle has various limitations. In addition, the transmission gearbox of a work equipment can be manufactured to include certain features, such as a metal plate fastened to the inner wall of the gearbox housing with fasteners, which serves as a baffle or a guide for directing the flow of lubricant towards areas of the transmission that are in urgent need of lubrication. Although such a separate lubricant guiding feature can generally effectively provide this function, such a separate lubricant guiding feature increases the overall number of components, cost, and complexity of the work equipment transmission.

[0021] Accordingly, there is a continuing need to provide a work equipment (e.g., vehicle) transmission gearbox having improved lubrication performance characteristics, reduced part count, lower manufacturing costs, and other desirable characteristics. To meet this need, there is provided herein a work equipment transmission gearbox having such desirable characteristics and achieved at least in part by strategically incorporating one or more unique multi-functional baffles into the gearbox housing of the transmission gearbox. As described below, embodiments of the multi-functional baffle provide multiple functions simultaneously to optimize transmission lubrication, maintain critical component spacing, and enhance other operational aspects of the transmission gearbox; such as reducing wind resistance. According to an embodiment, such functions may include providing an integrally formed straw for sucking a liquid lubricant such as oil from a lubricant reservoir and for delivering the lubricant through an outlet port provided in the gearbox housing. The straw may further include certain features, such as molded resilient spring fingers, which provide a secure seal and ensure proper alignment of the outlet end of the straw with the outlet port while eliminating or reducing the reliance on fasteners. In at least some embodiments, the interface between the straw and the outlet may also serve as an anti-rotation feature to prevent undesired rotation of the baffle within the transmission.

[0022] In addition to the straw, embodiments of the multi-functional baffle may also include a circumferential shroud wall that at least partially extends around the outer periphery of one or more gears around which the baffle is positioned. The circumferential shroud wall may be sized to provide a relatively tight (low clearance) fit around the enclosed gear(s) such that the accumulation of lubricant within the shroud is minimized to reduce wind resistance and improve the performance of the work equipment transmission. Further, in some embodiments, all or a substantial portion of the straw of the multi-functional baffle may be integrally formed with the circumferential shroud wall as a single piece; e.g., by molding, additive manufacturing, or using another manufacturing technique. Various other features of the multi-functional baffle may also be integrally formed as a single piece or as features or parts of a monolithic piece, including but not limited to any combination of the retention projections, tubular extensions or sleeves, and annular end walls mentioned below and the spring fingers (when present) mentioned above. Additionally, in certain embodiments, at least one separately manufactured tubular piece (herein, "straw liner") may be embedded within the body of the one-piece straw to further facilitate a highly integrity seal of the straw. For example, in one possible method, the straw body, circumferential shroud wall, and other baffle features may be produced as a single molded piece that is overmolded around the straw liner. This can not only impart a robust construction to the multi-functional baffle structure at a reduced manufacturing cost, but such construction can further enhance the seal of the straw to reduce (if not eliminate) air entrapment in the lubricant flow drawn through the straw.

[0023] Embodiments of the multifunctional baffle can also provide other benefits. For example, the circumferential shroud wall or the surface of the multifunctional baffle can generally be used as a barrier or guide for directing the flow of lubricant to critical areas of the transmission gearbox. Additionally or alternatively, embodiments of the multifunctional baffle can include interchangeable covers or adapters to enhance the adaptability or versatility of the baffle for use on multiple work equipment transmission platforms. The interchangeable covers can be freely replaced by other covers of different sizes, each sized for use in a different transmission gearbox. In various embodiments, an inner circumferential groove can be provided around the inner circumference of the circumferential shroud wall of the baffle, and the outer circumferential edges of the covers can each be sized to fitingly engage into the inner circumferential groove, for example, by press fit engagement. Thus, an appropriately sized cover can be selected based on the specific type of work equipment transmission in which the multifunctional baffle is desirably installed to provide a universal baffle system or kit. The following is combined with Figure 11 to further describe such an adaptable baffle system. However, first, in combination with Figures 1-10 describe exemplary embodiments of the multifunctional baffle and a work equipment transmission that suitably includes the multifunctional baffle.

[0024] Exemplary embodiments of work equipment transmissions and work equipment that can use the multifunctional baffle

[0025] Figure 1 is a perspective view of a work equipment, where the work vehicle is in the form of a motor grader 20, having an actively lubricated transmission gearbox, in which embodiments of the multifunctional baffle described below can be incorporated. In the example shown, the motor grader 20 includes a chassis or main frame 22, an operator station 24, and a grader blade 26 suspended below the main frame 22. The grader blade 26 can be connected to the main frame 22 by a grader blade suspension linkage 28 that includes various combinations of structural elements (e.g., double-arm cranks, crossbars, swivel connectors, etc.) and is controllably movable using any number of actuators such as hydraulic cylinders 30. Wheels 32, 34 are mounted to the main frame 22 and are selectively driven by motors contained within the motor grader 20. Specifically, four drive wheels 32 (two of which can be seen in Figure 1 are mounted to the rear or "rear unit" of the motor grader 20, while two steering wheels 34 are mounted to the front or "front unit" of the motor grader 20.

[0026] The motor grader 20 also includes at least one actively lubricated transmission gearbox. For example, the transmission gearbox can be configured within the main frame 22 of the motor grader 20, in a position behind the operator station 24, typically located in Figure 1within the region identified by the dashed box 36. During operation, the work equipment transmission gearbox transfers rotational motion from the engine of the motor grader 20 to other driven components of the motor grader 20 (such as the drive wheels 32), while providing a desired mechanical reduction between the engine output and the driven components. To help ensure the correct operation of the work equipment transmission gearbox over an extended period of time, the transmission gearbox is actively lubricated by the circulation of a selected lubricant, which is typically oil and can be filtered and otherwise conditioned (e.g., cooled) to maintain the lubricant quality. To further ensure the normal operation of the gearbox, although the motor grader 20 may operate in a relatively harsh, high-vibration environment, the work equipment transmission gearbox may also include one or more baffles that help maintain an appropriate spacing between the stationary and rotating components of the transmission. According to an embodiment of the present disclosure, the work equipment transmission of the motor grader 20 includes at least one multi-functional baffle that not only provides such a partial spacing function but also provides other functions (e.g., lubricant conduction and possibly lubricant distribution functions), as discussed more fully below in conjunction with Figures 2-10 is discussed more fully.

[0027] Turning to Figure 2 , there is shown an exemplary transmission gearbox 38 suitable for use within a work equipment such as the motor grader 20 described above in conjunction with Figure 1 . The work equipment transmission gearbox 38 includes a multi-functional baffle 40 and also contains various gears, shafts, bearings, and other such components arranged within gearbox housings 42, 44. In the example shown, the gearbox housings 42, 44 are primarily assembled from two mating halves or sections: a rear housing piece 42 or the rear housing piece 42 and a front housing piece 44 or the front housing piece 44. The terms "rear" and "front" as used herein are defined relative to the work equipment incorporating the transmission 38, noting that the gearbox 38 is seen from a separate rotating side view in Figure 2 . The work equipment transmission gearbox 38 is shown with the rear housing piece 42 slightly offset or spaced from the front housing piece 44 to show the internal components within the gearbox housings 42, 44. During assembly, the various components contained within the transmission gearbox 38 can be initially installed within the front housing piece 44. Then the rear housing piece 42 can be lowered onto the housing piece 44, as shown by the arrow 46. Finally, the housing pieces 42, 44 can be connected together using, for example, bolts or other fasteners.

[0028] In the example shown, the work equipment transmission gearbox 38 includes a splined output shaft 48 and an input shaft 50. The splined output shaft 48 extends from the multi-functional baffle 40 and is supported by a plurality of rolling bearings 52, in Figure 2Only one of them can be seen. Similarly, the input shaft 50 is supported by a plurality of bearings 54 to facilitate the rotation of the input shaft 50 and the support gear 56, which is rotationally fixed to the shaft 50 while being allowed to rotate relative to the stationary components of the gearbox 38. A variety of additional shafts 58 and gears 60 are mechanically connected between the input shaft 50 and the output shaft 48, and the rotation of the shafts 58 and gears 60 is achieved by a plurality of rolling bearings 62. The rotating components of the work equipment transmission gearbox 38 can be arranged in multiple stages, and in the illustrated example, the output shaft 48 serves as the output of a seven-stage gear transmission. In further embodiments, various other gear train configurations are possible, noting that the illustrated multifunctional baffle 40 can be used within a variety of different types of work equipment transmissions without limitation.

[0029] Figure 3 A portion of the transmission gearbox 38 is shown in a cross-section along a section that bisects the splined output shaft 48 along its length. With common reference Figure 2 and Figure 3 , the lower portion of the transmission gearbox 38 includes sump tanks 64, 66; i.e., liquid-tight chambers or compartments in which a substrate of lubricant or other liquid lubricant is retained. The sump tanks 64, 66 are defined by a lower cavity 64 provided in the front housing member 44 and a lower cavity 66 provided in the rear housing member 42. When assembled, the housing members 42, 44 abut to form a liquid-tight seal, enabling the sump tanks 64, 66 to retain the substrate of lubricant or "lubricant reservoir". Any number and type of gaskets or other sealing elements can be provided between the housing members 42, 44 to minimize leakage at this interface even if it cannot be eliminated. After the transmission gearbox 38 is assembled, a selected lubricant is injected into the interior of the gearbox 38 and collected within the sump tanks 64, 66 to form a lubricant reservoir. The volume of lubricant introduced into the transmission gearbox 38 will vary; however, as an example, Figure 3 the dashed line 68 in Figure 4 (described below) may represent the fill line of the transmission gearbox 38 and thus may correspond to the upper surface of the lubricant reservoir retained within the sump tanks 64, 66 when filling with the selected lubricant. The dashed line 68 is only a general indication of the position of the upper surface of the lubricant reservoir, noting that the volume of the lubricant reservoir (and thus the position of the upper surface) will vary depending on the volume of lubricant retained within the gearbox 38 at a given point in time and the operating state of the transmission. For completeness, an example of the lubricant reservoir is further shown in

[0030] The output gear 72 is located within the multi-functional baffle 40 and is rotatably fixed to the output shaft 48. In particular, the output gear 72 is positioned about the intermediate portion 74 of the output shaft 48 between the first or front terminal 76 and the second or rear terminal 78 of the shaft 48. When rotationally driven, the output shaft 48 rotates about a rotational axis. This axis is Figure 3 represented by the arrow 80 in and is hereinafter referred to as the "output axis 80". As previously noted, two rolling (e.g., roller) bearings 52 are disposed about the output shaft 48 to facilitate rotation of the shaft 48 about the output axis 80. The leftmost bearing 52 is mounted between the outer periphery of the output shaft 48 and the inner periphery of an inwardly projecting tapered structure or annular boss 82 formed in the front housing member 44. The outer ring of the leftmost or forward bearing 52 is received or pilots against a circumferential cup 84 formed in the annular boss 82, which circumferential cup defines a central opening 86 extending through the boss 82. The end 76 of the output shaft 48 projects through the central opening 86 for mechanical connection from the exterior of the gearbox housing 42, 44 to a corresponding rotating member. Similarly, the rightmost bearing 52 is mounted between the outer periphery of the output shaft 48 and the inner periphery of an annular boss 88 formed in the rear housing member 42, which annular boss extends inwardly toward the baffle 40. The outer ring of the rightmost bearing 52 is located within a circumferential cup 90, which circumferential cup defines a central opening 92 extending through the annular boss 88. The end 78 of the output shaft 48 projects through this opening 92 for mechanical connection from the exterior of the gearbox housing 42, 44.

[0031] To deliver lubricant to the interior of the multi-functional baffle 40, at least one lubricant distribution passage 94, 96 may be formed in the output shaft 48. The lubricant distribution passages 94, 96 include a passage inlet 98 formed in the front end portion 76 of the output shaft 48 and a passage outlet 100 formed in the intermediate portion 74 of the shaft 48. The passage inlet 98 is fluidly connected to the longitudinally extending section 94 of the lubricant distribution passages 94, 96, which in turn is fluidly coupled to the passage outlet 100 through the radially extending section 96 of the passages 94, 96. The multi-functional baffle 40 defines the intermediate portion 74 of the output shaft 48, and the passage outlet 100 is formed in this intermediate portion 74. Additionally, the inner cavity of the multi-functional baffle 40 may be substantially coaxial with the output shaft 48 and the enclosed gear 72. Thus, the lubricant directed through the lubricant distribution passages 94, 96 is directed to the interior of the multi-functional baffle 40 to lubricate the enclosed rotating gear 72, the rear bearing 52, and any other rotating components contained within the baffle 40. During high-speed rotation of the output shaft 48, the lubricant flowing through the lubricant distribution passages 94, 96 may occur at least partially due to the centrifugal force acting on the lubricant within the radially extending section 96. In an embodiment, the lubricant may reach the inlet 98 of the lubricant distribution passages 94, 96, and / or flow downward by gravity through one or more channels 102 formed in the upper portion of the annular boss 82 and into the front bearing 52.

[0032] Reference is also made to Figures 4-6 , any number of circumferential openings or windows 104, 106 may be formed in the multi-functional baffle 40 to, for example, allow the (one or more) gears external to the multi-functional baffle 40 to mesh with the gear 72 or the (one or more) gears enclosed by the baffle 40. In the example shown, specifically, the multi-functional baffle 40 includes two such windows 104, 106, which are hereinafter referred to as the "hood window 104" and the "casing window 106", respectively. As most clearly shown in Figure 5 and 6 , the output gear 72 surrounded by the multi-functional baffle 40 meshes with one of the intermediate stage gears 60 in the transmission gearbox 38 through the hood window 104. As shown, during the assembly of the transmission gearbox 38, the output gear 72 and the multi-functional baffle 40 may be initially installed within the front housing 44. Then, the intermediate stage gear 60 meshing with the output gear 72 and the shaft 58 supporting the gear 60 may be installed within the front housing member 44. Thus, the front bearing 62 supporting the shaft 48 may be matingly inserted into a cylindrical cavity 108 ( Figure 5 ) provided in the front housing member 44.

[0033] Now turning to Figures 7-9, the exemplary multi-functional baffle 40 will be described in more detail. In addition to the above-described windows 104, 106, the multi-functional baffle 40 further includes a circumferential shroud wall 110 as a main feature and a straw 112 having an outer tube wall or body 114. In various embodiments, a substantial portion, if not the entire straw body 114, may be integrally formed with the circumferential shroud wall 110 as a single piece or monolithic member. In such an embodiment, the straw 112 may be more specifically referred to as an "integral straw 112". Additionally, in the illustrated embodiment, since the straw body 114 is integrally formed with the circumferential shroud wall 110 as a single piece, this term will be used hereinafter with reference to the straw 112. Although it is a current example, in all embodiments of the multi-functional baffle 40, the straw body 114 need not be integrally formed with the circumferential shroud wall 110. Additionally, even when the outer tubular body 114 of the straw 112 is integrally formed with the circumferential shroud wall 110 as a single piece, the straw 112 may further include one or more additional, separately manufactured components, such as the embedded straw liner 116 more Figure 9 discussed.

[0034] With common reference Figures 3-9 , the circumferential shroud wall 110 of the multi-functional baffle 40 may take the form of a generally tubular or tunnel-like structure having a front circumferential edge 118 and an opposite rear circumferential edge 120. In the illustrated embodiment, the body of the multi-functional baffle 40 is not entirely defined by the circumferential shroud wall 110, but also includes an annular end wall 122 and a tubular extension or sleeve 124. The annular end wall 122 extends in a radially inward direction from the rear circumferential edge 120 of the circumferential shroud wall 110. The term "radial" as used herein refers to the direction perpendicular to the centerline of the multi-functional baffle 40, which corresponds to the Y-axis of the coordinate legend 125 that appears in Figure 9 the lower left corner. In comparison, the tubular sleeve 124 projects from the annular end wall 122 in an axial direction opposite to the circumferential shroud wall 110; i.e., in the backward direction in the illustrated example. As further used herein, the term "axial" refers to the direction parallel to the centerline of the multi-functional baffle 40, which corresponds to the X-axis of the coordinate legend 125. The tubular sleeve 124 may further assist in maintaining component spacing and preventing undesired contact or friction between the rotating and stationary components within the drive gearbox 38. Additionally, as described above, a gap or cushion is provided between the enclosed gear 72 and the end wall 122. The lower portion of the annular end wall 122 may also serve as a barrier feature or retaining wall to prevent the inner lower portion of the multi-functional baffle 40 (defined by the lower portion of the circumferential shroud wall 110 and located within the lubricant reservoir 70) from being filled with a pool of lubricant. Together with the relatively tight dimensions of the multi-functional baffle 40 relative to the enclosed gear 72, this may reduce the wind resistance of the gear 72 during operation of the work equipment drive gearbox 38.

[0035] AsFigure 7 As marked in Figure 7 , a central opening 126 is formed in the annular end wall 122 and connects the main internal compartment or cylindrical cavity of the multifunctional baffle 40 (i.e., the interior of the baffle 40 defined by the circumferential shroud wall 110) to a smaller internal compartment of the baffle 40 (i.e., the interior of the baffle 40 defined by the tubular extension or sleeve 124). When the multifunctional baffle 40 is installed within the drive gearbox 38, the output shaft 48 extends through the central opening 126 and through the open front and rear ends of the baffle 40. Additionally, when the drive gearbox 38 is assembled, the front circumferential edge portion 118 of the circumferential shroud wall defines or extends around the forward opening 128 of the baffle 40, as Figure 8 shown. An interchangeable adapter sleeve or part 130 can be received through this forward opening 128 in a mating or snug fit relationship. The annular cover 130 can be retained within the circumferential shroud wall 110 by engaging, for example, an inner circumferential notch or groove 132 (or other retention scheme) provided around the interior of the circumferential shroud wall 110, as described more fully below.

[0036] In the example shown, the annular cover 130 has a disc-like or plate-like form factor. As Figure 8 further shown, the plate-like body of the cover 130 includes an outer peripheral edge 134, an inner circumferential edge 136, and a central opening 138 defined by the inner circumferential edge 136. Additionally, an inner annular rim 140 projects axially (specifically, in the forward direction) from the inner circumferential edge 136 of the cover 130. As Figure 3 shown, when the multifunctional baffle 40 is installed within the gearbox drive gearbox 38, the inner annular rim 140 matingly engages or aligns with a corresponding raised rim or lip 141 provided around the annular boss 82 of the front housing piece 44; for example, the inner annular rim 140 of the cover 130 can be received within the projecting annular lip 141 of the boss 82 that is coaxial with the rim 140 and the output axis 80. The mating interface between the inner annular rim 140 and the annular lip 141 thus positions the annular cover 130 relative to the boss 82 to help retain the multifunctional baffle 40 in proper position within the gearbox housing 42, 44. In other embodiments, different attachment arrangements can be used. The annular cover 130 is thus located along the output axis 80 between the annular boss 82 and the output gear 72.

[0037] As previously mentioned, the outer peripheral edge 134 of the annular cover 130 can be received within the inner circumferential groove 132 provided around the interior of the circumferential shroud wall 110 (in Figure 8within the (mid - marker). In further embodiments, various other attachment schemes can be employed to connect the aforementioned components in a desired manner. For example, in a further embodiment, the cover 130 can be held within the baffle 40 using a snap ring (compressed and then providing a permanent hold within the housing). Generally, the shaft 48 can be assembled with the cover 130 before the baffle 40 is positioned within the housing 82.

[0038] The multifunctional baffle 40 also includes a foot or base 142 located below the circumferential shroud wall 110. When the multifunctional baffle 40 is installed in the drive gearbox 38, the base 142 engages the bottom plates of the gearbox housings 42, 44 to provide a vertical spacing. At least in part due to the coaxial features and the rigidity and positioning provided by the straw 112, the baffle 40 can provide this vertical spacing. Additionally, the base 142 can increase the rigidity of the multifunctional baffle 40 while helping to position the baffle 40 within the gearbox housings 42, 44. In this regard, the multifunctional baffle 40 can include a plurality of extensions or protrusions 144 that project from the base 142. The protrusions 144 are received in a mating manner by one or more notches or slots formed in one of the gearbox housings 42, 44. For example, as Figure 3 most readily observable, when assembled to produce the gearbox housings 42, 44, the protrusions 144 can be received in one or more slots formed at the interface of the front housing piece 44 and the rear housing piece 42. In the example shown, the multifunctional baffle 40 includes three such protrusions 144 that are laterally spaced along the bottom edge of the base 142. If desired, a plurality of reinforcing ribs 146 ( Figure 8 ) can also be included in the baffle 40, and the plurality of reinforcing ribs 146 extend downward from the circumferential shroud wall 110 to the protrusions 144 to increase structural integrity. Additionally, when the multifunctional baffle 40 is installed in the drive gearbox 38, the reinforcing ribs 146 can terminate at and abut the bottom plates of the fluid collection tanks 64, 66.

[0039] A more detailed discussion of the one - piece straw 112 will now be presented in conjunction with Figures 3-9 with reference to Figure 10 In addition to the outer wall or straw body 114, the one - piece straw 112 also includes the following main features: an inlet end 148, an outlet end 150, and a lubricant flow channel 152 that extends from the inlet end 148 to the outlet end 150 within the straw body 114. The inlet end 148 of the one - piece straw 112 can be positioned adjacent to the base 142 of the multifunctional baffle 40 and the retaining protrusions 144. When the multifunctional baffle 40 is installed within the gearbox housings 42, 44, and when the fluid collection tanks 64, 66 are filled with a selected lubricant to form a lubricant reservoir 70 ( Figure 4)When, the inlet end 148 of the one-piece straw 112 is arranged to be in fluid communication with the lubricant reservoir 70. In contrast, the outlet end 150 of the one-piece straw 112 is arranged to be in fluid communication with the outlet port 154. During the operation of the multi-functional baffle 40, the lubricant is sucked through the lubricant flow channel 152 and discharged from the gearbox housing 42, 44 through the outlet port 154 provided in the wall 156 of the rear housing member 44. The outlet end 150 is engaged or otherwise mechanically coupled into the outlet port 154 to provide a fluid-tight connection at this interface. The engagement of the outlet end 150 into the outlet port 154 can also serve as an anti-rotation feature, which together with the capture of the protrusion 144 between the gearbox housing 42, 44 helps to prevent the movement of the baffle 40 during the high-speed rotation of the output shaft 48 and the supported output gear 72.

[0040] To provide a reliable low-leakage connection between the outlet end 150 of the one-piece straw 112 and the outlet port 154, an annular seal (e.g., O-ring 158) can be compressed between the outer surface of the outlet end 150 and the surface of the housing wall 156 that defines the outlet port 154. Additionally, as Figure 10 shown, an internal annular groove 160 can be provided around the inner circumference of the housing wall 156 that defines the outlet port 154. A plurality of (e.g., resilient) alignment features 162 can project from the outlet end 150 and engage into the inner annular groove 160 when the outlet end 150 is inserted into the outlet port 154. In an embodiment, the alignment features 162 take the form of a circumferential array of spring fingers 162 that define a straw outlet port 164 provided in the outlet end 150 of the one-piece straw 112. As shown, when the outlet end 150 of the one-piece straw 112 is pressed into the outlet port 154, the spring fingers 162 can elastically engage into the inner annular groove 160. This can ensure the proper positioning of the one-piece straw 112 while providing a secure, fastener-free connection between the outlet end 150 and the outlet port 154. Additionally, in some embodiments, the spring fingers 162 can be integrally formed as a single piece with the straw body 114 and possibly with the circumferential shroud wall 110 using a molding process, additive manufacturing, or another manufacturing technique.

[0041] In the illustrated embodiment, the tubular filter insert 166 may be installed in the outlet port 154 and extend through the straw outlet port 164 into the outlet end 150 of the one-piece straw 112. The tubular filter insert 166 includes an elongated body having a flanged end 168 and an opposite tip portion 170. Perforations (not shown) are formed in the insert body to allow lubricant to pass through while blocking larger debris or particles carried by the lubricant. The seal assemblies 172, 174 may be brazed or otherwise attached between the mating conduit 176 and the housing wall 156, and an outlet port 154 with an O-ring 179 is also provided, and the O-ring is compressed between the outer surface of the housing wall 156 and the seal assemblies 172, 174 to enhance the seal.

[0042] In some embodiments, the tubular filter insert 166 may have a length that extends beyond the centerline of the flow channel 152 within the one-piece straw 112. In such a case, the outlet end 150 of the one-piece straw 112 may have a geometry sized to accommodate the tubular filter insert 166. For example, as Figure 10 shown, the outlet end 150 may have a T-shaped geometry including a closed projection 178. When the tubular filter insert 166 is inserted into the outlet end 150, the tip 170 of the tubular filter insert 166 may extend into the closed projection 178. In other embodiments, the tubular filter insert 166 may be replaced by a different type of filter element or may have a length such that the closed projection 178 is not necessary. As another possibility, such a filter element may be omitted at the interface between the outlet end 150 of the one-piece straw 112 and the outlet port 154 provided in the gearbox housings 42, 44. Although described above, any or all of the above features may be omitted in other embodiments of the multi-functional baffle 40.

[0043] As previously described, one or more separately manufactured straw liners 116 may be embedded within the body 114 of the one-piece straw 112. When such a straw liner 116 is present, the inner surface of the straw liner 116 may define a majority of the lubricant flow passage 152. Thus, the provision of the straw liner 116 may help ensure that the straw 112 is given an airtight configuration along its length to minimize or eliminate air entrapment in the lubricant drawn through the straw 112. To best provide this function, the straw liner 116 may extend within the body 114 of the one-piece straw 112 from the inlet end 148 to the outlet end 150 of the one-piece straw 112. Additionally, the straw liner 116 may have a geometry that generally corresponds to the geometry of the straw body 114, including, for example, a T-shaped upper end 180 that is embedded within the outlet end 150 of the one-piece straw 112. The straw liner 116 may also include a stepped terminus 182 that terminates near the straw outlet port 164 at a location adjacent to the spring fingers 162. In other embodiments, the straw liner 116 may be omitted; for example, if there is no parting line extending through the straw 114.

[0044] When included in the multi-functional baffle 40, the straw liner 116 can be manufactured using different production techniques including injection molding, thermoforming, or additive manufacturing. In certain embodiments, the body of the multi-functional baffle 40 (e.g., the straw body 114 including the circumferential shroud wall 110, the annular end wall 122, the tubular sleeve 124, and the integral straw 112) can be manufactured as a single piece from a first material (e.g., by molding or additive manufacturing). In contrast, the straw liner 116 can be made from a second material different from the first material. In embodiments where the geometry permits, the straw liner 116 can be manufactured separately from the body of the baffle and subsequently installed in the straw flow channel 152, for example, by press fitting. Alternatively, the body of the multi-functional baffle 40 can be formed over and around the straw liner 116 using, for example, insert molding techniques or overmolding techniques. In such embodiments, the straw liner 116 can be composed of a first material having a first melting point, such as a first thermoplastic. Then, the body of the multi-functional baffle 40 can be overmolded (or "insert molded") with a second material, such as a second thermoplastic, over and around the straw liner 116. The second material can be selected to have a second melting point less than the first melting point to prevent unwanted backflow of the straw liner 116 during the overmolding process. In certain embodiments, all of the above features except the cover 130 can be integrally formed as a single molded piece when overmolded over and around the embedded straw liner 116. The straw liner 116 can also simplify the overmolding process by helping to define the lubricant flow channel 152 disposed within the integral straw 112. Despite these advantages, in other embodiments, the multi-functional baffle 40 can be without the straw liner 116 and / or the body of the multi-functional baffle 40 can be produced in other ways, such as by 3D printing.

[0045] Embodiments of the multi-functional baffle 40 can allow the tubular cover 130 to be freely interchanged with other covers having different sizes and geometries. The size and shape of each cover can be configured to matingly engage with the body of the multi-functional baffle 40; for example, by engaging with the inner circumferential groove 132 disposed inside the circumferential shroud wall 100. This allows the cover 130 to be interchanged or "swapped" with other covers of different sizes to allow the multi-functional baffle 40 to be used on multiple work equipment transmission platforms. The interchangeable nature of the cover 130 will now be discussed in conjunction with Figure 11 the interchangeable nature of the cover 130.

[0046] In Figure 11 the example of, as shown by arrow 184, at least three different covers 130, 186, 188 can be used in combination with the multi-functional baffle 40. Although only three covers 130, 186, 188 are shown (including the previously shown in Figures 3-10 and shown in Figure 11The relatively thin plate-like cover 130 shown in the upper row), but any practical number and type of covers can be used in combination with the multi-functional baffle 40. The geometries and dimensions (mainly the lengths) of the covers 130, 186, 188 are different, but the dimensions and shapes of the outer peripheral edges of each cover are set to mate with the open end of the inserted circumferential cover wall 110, as previously described. As shown by arrow 190, when assembled to include the smaller plate-like cover 130, the multi-functional baffle 40 can be installed within a first type of drive gearbox (i.e., the drive gearbox 38 described above in connection with Figures 2-10 ). In this case, the length of the cover 130 can be sufficiently restricted such that the front bearing 52 is partially nested within the circumferential cover wall 110, as shown. When instead assembled to include the intermediate-sized cover 186, the multi-functional baffle 40 can be used in a second type of drive gearbox 192, as shown in Figure 11 the middle row portion. In this case, a greater axial spacing is provided between the front bearing 52 and the enclosed gear 72. Finally, when used with the large cover 188, the multi-functional baffle 40 can be installed with a third type of drive gearbox 194 ( Figure 11 shown in cross-section in the bottom row portion), providing the maximum axial spacing between the front bearing 52 and the enclosed gear 72. This interchangeability of the covers 130, 186, 188 enables the multi-functional baffle 40 to be used on multiple work equipment drive platforms, improving versatility and reducing manufacturing costs through mass production.

[0047] Examples of work equipment drives incorporating the multi-functional baffle

[0048] In addition, the following examples are provided, numbered for ease of reference.

[0049] 1. A work equipment (e.g., vehicle) drive, comprising a gearbox housing having an outlet port, a sump located within the gearbox housing and serving as a reservoir for storing lubricant when filled with lubricant, and a first gear mounted within the gearbox housing for rotation about a first axis. A portion of the first gear is located below the upper surface of the lubricant reservoir. A multi-functional baffle, which is mounted within the gearbox housing, includes: a circumferential cover wall that extends into the lubricant reservoir and at least partially surrounds the outer periphery of the first gear, and an integral suction tube. The integral suction tube in turn includes a suction tube body formed integrally with the circumferential cover wall, an inlet end in fluid communication with the lubricant reservoir, an outlet end in fluid communication with the outlet port, and a lubricant flow passage that extends within the suction tube body from the inlet end to the outlet end, and through which lubricant is suctioned from the lubricant reservoir.

[0050] 2. The transmission device of the working equipment according to Example 1 further includes a second gear, which is installed in the gearbox housing and is used to rotate around a second axis parallel to the first axis. Additionally, the multi-functional baffle further includes a cover window formed in the circumferential cover wall, and the second gear meshes with the first gear through this cover window.

[0051] 3. The transmission device of the working equipment according to Example 1, wherein the multi-functional baffle further includes: an annular end wall, which extends radially inward from the circumferential edge of the circumferential cover wall; a central opening, which is formed in the annular end wall; and a tubular sleeve, which protrudes from the annular end wall in the axial direction opposite to the circumferential cover wall.

[0052] 4. The transmission device of the working equipment according to Example 3 further includes an output shaft, the first gear is installed on the output shaft in a rotationally fixed relationship, and the output shaft extends through the central opening formed in the annular end wall.

[0053] 5. The transmission device of the working equipment according to Example 3, wherein the annular end wall, the tubular sleeve, the circumferential cover wall and the straw body are integrally formed as a single molded part.

[0054] 6. The transmission device of the working equipment according to Example 3 further includes a sleeve window, which is formed in the tubular sleeve and is positioned to allow lubricant to flow into the tubular sleeve from above the multi-functional baffle during the operation of the transmission device of the working equipment.

[0055] 7. The transmission device of the working equipment according to Example 6 further includes: a shaft, the second gear is installed on the shaft in a rotationally fixed relationship; and a third gear, the third gear is installed on the shaft and has a lower part extending into the sleeve window.

[0056] 8. The transmission device of the working equipment according to Example 1, wherein the gearbox housing includes a front housing part and a rear housing part, and when the gearbox housing is assembled, the rear housing part cooperates with the front housing part. Additionally, the multi-functional baffle further includes: a base, which is located below the circumferential cover wall and is integrally formed with it, and at least one protruding part, the at least one protruding part protrudes from the base. The at least one protruding part is captured between the front housing part and the rear housing part to limit the movement of the multi-functional baffle within the gearbox housing.

[0057] 9. The transmission device of the working equipment according to Example 1, wherein the straw body is made of a first material. Additionally, the multi-functional baffle further includes a straw liner, which is embedded in the straw body, defines at least a part of the lubricant flow channel, and is made of a second material different from the first material.

[0058] 10. The working equipment transmission device according to Example 9, wherein the straw body is formed by overmolding around the straw liner, and the second material has a melting point higher than that of the first material.

[0059] 11. The working equipment transmission device according to Example 1, wherein the outlet end of the integral straw includes: a lubricant outlet through which lubricant is discharged from the multi-functional baffle; and at least one elastic feature integrally formed with the straw body, adjacent to the lubricant outlet and engaged in the outlet port.

[0060] 12. The working equipment transmission device according to Example 11, wherein the at least one elastic feature includes a plurality of elastic fingers distributed around the lubricant outlet. In addition, the lubricant output port includes an annular groove, and when the outlet end of the integral straw is inserted into the lubricant output port, the plurality of elastic fingers are aligned in the annular groove.

[0061] 13. The working equipment transmission device according to Example 1 further includes a shaft, and the first gear is mounted to the shaft in a rotationally fixed relationship. In addition, the multi-functional baffle further includes an annular cover defined by a circumferential cover wall and having a central opening through which the shaft extends.

[0062] 14. The working equipment transmission device according to Example 13, wherein the multi-functional baffle further includes an inner circumferential groove formed in the inner surface of the circumferential cover wall. The annular cover has an outer circumferential edge that is received in the inner circumferential groove when the annular cover is positioned within the circumferential cover wall.

[0063] 15. The working equipment transmission device according to Example 13, wherein the gearbox housing includes a front housing member having an annular boss, the shaft is rotatably mounted to the annular boss, and the annular cover is located between the annular boss and the first gear along the first rotation axis. The annular cover has an annular lip that extends around the central opening and engages with the annular boss to position the annular cover relative to the annular boss.

[0064] Overview

[0065] Accordingly, multiple embodiments of a work equipment (e.g., vehicle) transmission gearbox including a multi-functional baffle have been provided, where the multi-functional baffle simultaneously serves multiple key purposes or basic functions within the gearbox. In certain embodiments, the multi-functional baffle can include an integrally formed straw for guiding oil or other lubricant from a lubricant reservoir to an outlet port in an efficient manner while minimizing air entrapment within the extracted lubricant stream. The straw can include molded spring fingers or similar resilient features that are aligned with an outlet port disposed in the gearbox housing to ensure a secure seal and reduce the number of components. In embodiments, the entire or major portion of the straw of the multi-functional baffle can be integrally formed as a single piece with other features of the baffle (e.g., circumferential shroud wall, retaining protrusion, tubular sleeve, and / or annular end wall). Additionally, in certain embodiments, a straw gasket can be embedded within the body of the one-piece straw to further facilitate a highly integral seal of the straw. Finally, embodiments of the multi-functional baffle can include interchangeable covers or adapters that facilitate the adaptability or versatility of the baffle for use on multiple work equipment transmission platforms.

[0066] As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0067] The description of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the present disclosure. The embodiments specifically referred to herein have been chosen and described in order to best explain the principles of the present disclosure and its practical application, and to enable others of ordinary skill in the art to understand the present disclosure and recognize the many alternatives, modifications, and variations to the described (one or more) examples. Accordingly, various embodiments and implementations other than those specifically described are within the scope of the appended claims.

Claims

1. An operating equipment transmission device, comprising: A gearbox housing having an outlet port; A liquid collection tank located in the gearbox housing and serving as a reservoir for storing lubricant when filled with lubricant; A first gear mounted in the gearbox housing for rotating about a first axis, with a portion of the first gear being below the upper surface of the lubricant reservoir; And A multi-functional baffle mounted within the gearbox housing, the multi-functional baffle comprising: A circumferential cover wall extending into the lubricant reservoir and at least partially surrounding the outer periphery of the first gear; and An integrated suction pipe including a pipe body integrally formed with the circumferential cover wall, an inlet end in fluid communication with the lubricant reservoir, an outlet end in fluid communication with the outlet port, and a lubricant flow channel extending from the inlet end to the outlet end within the pipe body, and lubricant being suctioned from the lubricant reservoir through the lubricant flow channel; Wherein the multi-functional baffle further comprises: An annular end wall extending radially inward from the circumferential edge of the circumferential cover wall; A central opening formed in the annular end wall; and A tubular sleeve protruding from the annular end wall in an axial direction opposite to the circumferential cover wall.

2. The operating equipment transmission device according to claim 1, further comprising a second gear mounted in the gearbox housing for rotating about a second axis parallel to the first axis; Among them, The multi-functional baffle further comprises a cover window formed in the circumferential cover wall, and the second gear meshes with the first gear through the cover window.

3. The operating equipment transmission device according to claim 1, further comprising an output shaft, the first gear being mounted to the output shaft in a rotationally fixed relationship, the output shaft extending through the central opening formed in the annular end wall.

4. The transmission device of the working equipment according to claim 1, wherein, The annular end wall, the tubular sleeve, the circumferential cover wall and the pipe body are integrally formed as a single molded part.

5. The operating equipment transmission device according to claim 2, further comprising a sleeve window formed in the tubular sleeve and positioned to allow lubricant to flow into the tubular sleeve from above the multi-functional baffle during operation of the operating equipment transmission device.

6. The operating equipment transmission device according to claim 5, further comprising: A shaft, the second gear being mounted to the shaft in a rotationally fixed relationship; And A third gear mounted to the shaft and having a lower portion extending into the sleeve window.

7. The transmission device of the working equipment according to claim 1, wherein, The gearbox housing comprises: A front housing part; and A rear housing part, which mates with the front housing part when the gearbox housing is assembled; and Wherein the multi-functional baffle further comprises: A base located below and integrally formed with the circumferential cover wall; and At least one protruding member that protrudes from the base and is captured between the front housing member and the rear housing member to restrict movement of the multi-functional baffle within the gearbox housing.

8. The transmission device of the working equipment according to claim 1, wherein, The straw body is made of a first material; and wherein the multi-functional baffle further includes a straw liner that is embedded within the straw body, defines at least a portion of the lubricant flow passage, and is made of a second material different from the first material.

9. The transmission device of the working equipment according to claim 8, wherein, The straw body is overmolded around the straw liner; and wherein the second material has a melting point higher than that of the first material.

10. The transmission device of the work equipment according to claim 1, wherein, The outlet end of the one-piece straw includes: a lubricant outlet through which lubricant is discharged from the multi-functional baffle; and at least one elastic feature that is integrally formed with the straw body, adjacent to the lubricant outlet, and engages into the outlet port.

11. The transmission device of the working equipment according to claim 10, wherein, The at least one elastic feature includes a plurality of elastic fingers that are distributed around the lubricant outlet; and wherein the lubricant output port includes an annular groove, and when the outlet end of the one-piece straw is inserted into the lubricant output port, the plurality of elastic fingers are aligned within the annular groove.

12. The work equipment transmission according to claim 1, further comprising a shaft, wherein the first gear is rotatably fixed to the shaft; Among them, The multi-functional baffle further includes an annular cover that is defined by a circumferential shroud wall and has a central opening through which the shaft extends.

13. The transmission device of the working equipment according to claim 12, wherein, The multi-functional baffle further includes an inner circumferential groove formed in the inner surface of the circumferential shroud wall; and wherein the annular cover has an outer circumferential edge that is received within the inner circumferential groove when the annular cover is positioned within the circumferential shroud wall.

14. The transmission device of the working equipment according to claim 12, wherein, The gearbox housing includes a front housing member having an annular boss, the shaft is rotatably mounted to the annular boss, and the annular cover is located along the first axis between the annular boss and the first gear; and the annular cover includes an annular lip that extends around the central opening and engages with the annular boss to position the annular cover relative to the annular boss.

15. The work equipment transmission according to claim 12, further comprising a lubricant distribution passage formed in the shaft, having an inlet formed in an end portion of the shaft and an outlet formed in an intermediate portion of the shaft; and Among them, the multi-functional baffle defines the intermediate portion of the shaft such that when the lubricant is guided through the lubricant distribution passage, it is transmitted to the interior of the multi-functional baffle.

16. The work equipment transmission according to claim 1, further comprising a tubular screen insert that is positioned within the outlet port and extends into the outlet end of the one-piece straw; Among them, The outlet end of the one-piece straw includes: a lubricant outlet in fluid communication with the outlet port; and a closing protrusion opposite the lubricant outlet, the closing protrusion giving the outlet end a T-shaped geometry, and the tubular screen insert extending through the lubricant outlet and into the closing protrusion.

17. An operating equipment transmission, comprising: a gearbox housing having an outlet port; a sump located within the gearbox housing and holding a lubricant reservoir when filled with lubricant; a first gear mounted in the gearbox housing for rotation about a first axis, a portion of the first gear being located below the upper surface of the lubricant reservoir; and a multi-functional baffle mounted within the gearbox housing, the multi-functional baffle comprising: a circumferential shroud wall extending into the lubricant reservoir and at least partially surrounding the outer periphery of the first gear; an annular end wall partially surrounding a first end of the circumferential shroud wall; an annular cover fittingly inserted into an opposite second end of the circumferential shroud wall; and a tubular sleeve protruding from the annular end wall in an axial direction opposite the circumferential shroud wall.

18. The working equipment transmission device according to claim 17, wherein, The multi-functional baffle further comprises a suction pipe, the suction pipe comprising: a suction pipe body integrally formed with the circumferential shroud wall; an inlet end in fluid communication with the lubricant reservoir; an outlet end in fluid communication with the outlet port; and a lubricant flow channel extending within the suction pipe body from the inlet end to the outlet end, and during operation of the operating equipment transmission, the lubricant is suctioned through the lubricant flow channel from the lubricant reservoir.

19. A multi-functional baffle for installation in an operating equipment transmission, the operating equipment transmission comprising a gearbox housing having an outlet port, a sump within the gearbox housing, and a first gear, the sump holding a lubricant reservoir when filled with lubricant, the first gear being mounted in the gearbox housing for rotation about a first axis at a position partially below the upper surface of the lubricant reservoir, the multi-functional baffle comprising: a circumferential shroud wall extending into the lubricant reservoir and, when the multi-functional baffle is installed within the operating equipment transmission, at least partially surrounding the outer periphery of the first gear; and an integral suction pipe, the integral suction pipe comprising: a suction pipe body integrally formed with the circumferential shroud wall; an inlet end in fluid communication with the lubricant reservoir when the multi-functional baffle is installed in the operating equipment transmission; an outlet end in fluid communication with the outlet port when the multi-functional baffle is installed in the operating equipment transmission; and A lubricant flow passage that extends within the straw body from the inlet end to the outlet end, and the lubricant is suctioned through the lubricant flow passage from the lubricant reservoir, wherein the multi-functional baffle further includes: An annular end wall that extends radially inward from the circumferential edge of the circumferential cover wall; A central opening formed in the annular end wall; and A tubular sleeve that projects from the annular end wall in an axial direction opposite to the circumferential cover wall.

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