Snow wing connecting rod

Abstract

A snow wing assembly for a machine includes a moldboard and a linkage assembly. The connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod. The first connecting rod is connected with the moldboard. The second link is pivotally coupled with the first link at a first outer side end of the second link. The third link is pivotally coupled with the first link at a second outer side end of the third link. A fourth link is coupled with the machine and pivotally coupled with a first inboard end of the second link and a second inboard end of the third link. The third link is selectively adjustable to vary a distance between the second outboard end and the second inboard end for tilting the moldboard.

Description

Technical Field

[0001] The present invention generally relates to an articulated snow wing attachment intended for use with heavy equipment such as a motor grader machine. In particular, the present invention relates to a snow wing linkage that couples a snow wing blade to a heavy equipment, specifically a motor grader, and articulates the snow wing blade relative to the motor grader. Background Art

[0002] Earthmoving machines (such as motor graders) are commonly used to push or level dirt, gravel, snow, or other working materials. A motor grader includes a ground engaging blade coupled to a frame and positioned midway between front and rear wheels. The blade can pivot, raise, or lower relative to the frame of the motor grader. The blade can engage the ground surface to plow, level, or otherwise engage the working materials. A motor grader can be equipped with an attachment implement that extends laterally outward to one side of the motor grader. Such an attachment implement is often referred to as a snow wing, which can be used to further engage the working materials positioned to the side of the motor grader. The snow wing includes a plow blade (e.g., a blade) coupled to the motor grader via two or more linkages. The snow wing can be raised or lowered relative to the frame of the motor grader such that the snow wing can engage the working materials at a variable height above the ground surface. For example, the plow blade can be positioned to engage the ground surface, but can also be raised from the ground surface such that the snow wing plows snow at a certain spacing (sometimes referred to as the bench height above the ground surface, e.g., one foot above the ground surface). The snow wing can further pivot relative to the ground surface about a pivot point proximal to the motor grader such that the plow blade can engage an inclined surface. The distal end of the plow blade can pivot downward relative to the motor grader for use on a contour such as a ditch, or can pivot upward relative to the motor grader for use on a contour such as a hillside.

[0003] The snow wing linkage can facilitate the movement of the plow blade. In conventional machines, typically two types of snow wing linkage designs are used: with a mast and without a mast. In the case of a snow wing with a mast, the mast is coupled to a motor grader, and the plow blade translates up and down along the mast to change the height of the plow blade relative to the ground surface. The mast is typically large and can obstruct the operator's line of sight from the motor grader cab during operation. Additionally, the mast can inhibit the operation of the door towards the motor grader cab. In the case of a snow wing without a mast, a four-bar linkage is used to couple the plow blade to the motor grader. The four-bar linkage is coupled to the motor grader at a first end and to the plow blade at a second free end. The four-bar linkage includes four rigid links and a lift cylinder to pivot the second end of the four-bar linkage relative to the first end, thereby causing the plow blade to raise or lower relative to the ground surface. While the snow wing without a mast provides greater visibility from the cab and increased cab door functionality, the snow wing without a mast provides a smaller range of workbench heights. On the other hand, the snow wing with a mast provides a larger range of available workbench heights.

[0004] Both the snow wing with a mast and the snow wing without a mast use complex linkage arrangements to articulate the snow wing plow blade. For example, both the with-mast and without-mast designs include a hydraulic actuator to pivot the plow blade about a pivot joint, where the pivot joint is a pin that extends through the working material that engages the surface of the plow blade. Since this pivot joint is exposed to the working material (such as snow and salt on a road surface), it is undesirably vulnerable to corrosion. Both the with-mast and without-mast designs also include a push rod that couples the plow blade to the rear of the motor grader to selectively rotate the plow blade inwardly or outwardly about the mast or the hinge of the four-bar linkage, respectively. The push rod is coupled to the motor grader via a shear pin that is configured to act as a safety device and will break if the plow blade is subjected to a high enough force. When the shear pin breaks, the push rod cannot operate, and the plow blade cannot be articulated. The operator must stop the machine and replace the broken shear pin before operation can resume. The push rod further limits the range of motion of the plow blade such that the plow blade cannot be tightly retracted against the side of the motor grader, which undesirably limits the visibility of the operator from the cab. SUMMARY OF THE INVENTION

[0005] One aspect of the present invention relates to a snow wing assembly for a machine, including a plow blade and a linkage assembly. The linkage assembly includes a first link, a second link, a third link, and a fourth link. The first link is coupled to the plow blade. The second link is pivotally coupled to the first link at a first outer end of the second link. The third link is pivotally coupled to the first link at a second outer end of the third link. The fourth link is coupled to the machine and is pivotally coupled to a first inner end of the second link and a second inner end of the third link. The third link is selectively adjustable to change the distance between the second outer end and the second inner end for tilting the plow blade.

[0006] Another aspect of the present invention relates to a linkage assembly for a machine, including a first link, a second link, a third link, and a fourth link. The first link defines a first axis. The second link is pivotally coupled to the first link at a first outer end of the second link. The third link is pivotally coupled to the first link at a second outer end of the third link. The fourth link is configured to be coupled to the machine. The fourth link is pivotally coupled to a first inner end of the second link and a second inner end of the third link. The third link is selectively adjustable to change the orientation of the first axis relative to the ground surface.

[0007] Another aspect of the present invention relates to a snow wing assembly for a machine, including a first linkage assembly, a second linkage assembly, and a plow blade. The first linkage assembly includes a first link, a second link, a third link, and a fourth link. The second link is coupled to the first link at a first outer end of the second link and is pivotable about an inclined axis. The third link includes a first actuator. The third link is coupled to the first link at a second outer end of the third link. The fourth link is configured to be coupled to the machine. The fourth link is pivotally coupled to the second link at a first inner end of the second link and is pivotally coupled to the third link at a second inner end of the third link. The second linkage assembly is coupled to the machine at a third inner end. The second linkage assembly includes a second actuator. The plow blade includes an inner side surface and an outer side surface opposite the inner side surface. The plow blade is coupled to the first link on the inner side surface and is pivotable about an angular axis. The plow blade is pivotally coupled to a third outer end of the second linkage assembly on the outer side surface. The first actuator is configured to rotate the plow blade about the inclined axis, and the second actuator is configured to rotate the plow blade about the angular axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a front perspective view of a machine according to an exemplary embodiment, the machine having a snow wing assembly in an extended position.

[0009] Figure 2 is according to Figure 1 a front view of the machine and the snow wing assembly in an extended position according to an exemplary embodiment.

[0010] Figure 3 is according to an exemplary embodiment of Figure 1 the machine, with the snow wing in a stowed position, in a right perspective view.

[0011] Figure 4 is according to Figure 1 an exemplary embodiment of the machine and the top of the snow wing assembly in an extended position.

[0012] Figure 5 is of the Figure 1Rear perspective view of the snow wing assembly.

[0013] Figure 6 is a rear perspective view of the Figure 1 snow wing assembly in a raised and deployed position according to an exemplary embodiment.

[0014] Figure 7 is according to an exemplary embodiment of Figure 1 the linkage assembly of the snow wing assembly.

[0015] Figure 8 is according to Figure 7 an exemplary embodiment of the linkage assembly in a first orientation.

[0016] Figure 9 is according to Figure 7 an exemplary embodiment of the linkage assembly in a second orientation.

[0017] Figure 10 is according to an exemplary embodiment of Figure 7 the floating member of the linkage assembly.

[0018] Figure 11 is according to Figure 10 a detailed view of the floating member of the linkage assembly according to an exemplary embodiment.

[0019] Figure 12 is according to Figure 1 an exemplary embodiment of the front perspective view of the snow wing assembly.

[0020] Figure 13 is according to an exemplary embodiment of Figure 1 a partial cross-sectional view of the cab of the machine.

[0021] Figure 14 is a rear perspective view of the Figure 1 snow wing assembly in a lowered and deployed position according to an exemplary embodiment. DETAILED DESCRIPTION

[0022] Referring to Figures 1 to 4 etc., the machine 100 or a piece of heavy equipment, which is shown as a motor grader 100 in this case, generally includes a frame 102, a first side 105, a second side 110 opposite the first side 105, a front portion 115, and a cab 120 coupled to the frame 102. As shown, the first side 105 is the right side. In other embodiments, the first side 105 may be the left side. As Figures 3 to 4As depicted in the like, the motor grader 100 further includes a rear portion 305 and the like. The motor grader 100 includes a plurality of front wheels 122 and a plurality of rear wheels 310 rotatably coupled to the frame 102. One or more of the front wheels 122 and the rear wheels 310 are configured to propel the motor grader 100 when driven by an engine, an electric motor, or other propulsion means. The motor grader 100 includes a blade 125 pivotally coupled to the underside 300 of the frame 102 and extending generally laterally beneath the frame 102. The blade 125 extends beneath the frame 102 between the front wheels 122 and the rear wheels 310. During operation, the blade 125 selectively contacts the ground surface 170 to level, plow, or otherwise engage a working material such as snow, dirt, gravel, or some other material present on the ground surface 170.

[0023] The motor grader 100 includes a snow wing assembly 130 having a plow blade 135 coupled to the frame 102 of the motor grader 100 via a linkage assembly 165. The plow blade 135 includes a top 140, a bottom 145, an outer side surface 150, an inner side surface 155 opposite the outer side surface 150, and a working material engaging surface 160. The bottom 145 of the plow blade 135 defines an edge or tip of the plow blade 135 configured to selectively engage the ground surface 170 or the working material (e.g., snow, dirt, gravel, sand, or some other material) on the ground surface 170. As Figures 1 to 4 depicted in the like, the surface 160 is typically a curved concave surface. In other embodiments, the surface 160 of the plow blade 135 may be flat, curved, textured, smooth, or some combination thereof. The surface 160 does not have any pivot joints or other objects protruding through the surface 160. For example, the surface 160 is a generally uniform continuous surface such that the working material (e.g., snow) can traverse across the surface 160 substantially unimpeded rather than including a pivot joint extending through the surface 160 proximal to the inner side surface 155 (e.g., within one foot, within two feet). As Figures 1 to 4 depicted in the like, the top 140 and the bottom 145 of the plow blade 135 are not parallel such that the distance between the top 140 and the bottom 145 of the plow blade 135 is greater at one side (e.g., the outer side surface 150) than at the other side (e.g., the inner side surface 155). In other embodiments, the top 140 may be parallel to the bottom 145 such that the plow blade 135 exhibits a generally rectangular shape. Similarly, the radius of curvature of the plow blade 135 will typically vary between the inner side surface 155 and the outer side surface 150.

[0024] The plow blade 135 is movable relative to the frame 102 of the motor grader 100 and the ground surface 170 via a linkage assembly 165. The linkage assembly 165 is configured to selectively articulate the plow blade 135 to change the working height 200 of the plow blade 135. As Figure 2 depicted in, for example, etc., the working height 200 is the distance between the bottom 145 of the plow blade 135 or a point along the bottom 145 and the ground surface 170. For example, the linkage assembly 165 is configured to articulate the plow blade 135 to change the working height 200. The linkage assembly 165 is configured to selectively rotate the plow blade 135 inwardly (e.g., toward the first side 105 of the motor grader 100) or outwardly (e.g., away from the first side 105 of the motor grader 100). For example, the linkage assembly 165 is configured to selectively move the outer side surface 150 of the plow blade 135 away from the first side 105 by a distance 205 from the first side 105 (e.g., extend or retract). The linkage assembly 165 is configured to selectively tilt the plow blade 135 relative to the motor grader 100 or the ground surface 170. The linkage assembly 165 is configured to selectively raise or lower the outer side surface 150 of the plow blade 135 relative to the inner side surface 155 of the plow blade 135 such that the plow blade 135 is positioned at an inclination angle 210 relative to the horizontal plane or relative to the ground surface 170.

[0025] As Figure 4 depicted in, for example, etc., the snow wing assembly 130 includes a rear linkage assembly 410. The rear linkage assembly 410 includes a rear linkage actuator 415 that is coupled at a first end 420 to the dorsal side 440 of the plow blade 135 and at a second end 425 to a rear mounting member 430. The first end 420 is the outer end 420 of the rear linkage actuator 415. As Figure 2 and Figure 4 depicted in, for example, etc., the outer end 420 can be the cylinder end of the rear linkage actuator 415. However, as Figure 5 , Figure 6 and Figure 14As depicted in etc., the outer end 420 can be the rod end of the rear link actuator 415. The rear mount 430 is coupled to or integral with the rear 305 of the motor grader 100. The rear link actuator 415 is shown as a hydraulic actuator 415 configured to extend or retract to move the plow blade 135. Specifically, the rear link actuator 415 is configured to extend to rotate the outer side surface 150 of the plow blade 135 about an axis near the inner side surface 155 of the plow blade 135 (e.g., within one foot, within two feet, or some other distance). In this way, the link assembly 165 is configured to pivot the plow blade 135 outwardly or inwardly at an angle 435. For example, the rear link assembly 410 is configured to selectively pivot the plow blade 135 in the outward direction when the rear link actuator 415 extends such that the outer side surface 150 of the plow blade 135 is positioned away from the first side 105 of the motor grader 100. The rear link assembly 410 is configured to selectively pivot the plow blade 135 in the inward direction when the rear link actuator 415 retracts such that the outer side surface 150 of the plow blade 135 is positioned toward the first side 105 of the motor grader 100.

[0026] As Figure 3 and Figure 4 As depicted in etc., the link assembly 165 is coupled to the lower side 300 of the frame. The link assembly 165 is coupled to the lower side 300 of the frame 102 at least partially under the cab 120. The link assembly 165 extends outwardly from the lower side 300 of the frame 102 and away from the first side 105 of the motor grader 100. In other embodiments, the link assembly 165 can be coupled to a side (e.g., the first side 105 or the second side 110), the top side, or some other part of the motor grader 100. The link assembly 165 extends outwardly from the frame 102 at an angle 405 relative to the centerline 400 of the motor grader 100. The angle 405 is some angle other than 90° (e.g., a non-vertical angle) such that the link assembly 165 extends non-vertically from the centerline 400 of the motor grader 100. For example, in some embodiments, the angle 405 can be about 45° (e.g., ±15°), about 60° (e.g., ±15°), about 75° (e.g., ±15°). In other embodiments, the angle 405 can be less than 45° from the centerline 400 of the motor grader 100, between 45° and 75°, or greater than 75°. As Figure 4 As depicted in etc., the link assembly 165 extends non-vertically and at an angle 405 from the centerline 400 and extends toward the rear 305 of the motor grader 100 (e.g., away from the front 115 of the motor grader 100). In other embodiments, the link assembly 165 can extend toward the front 115 of the motor grader 100 (e.g., away from the rear 305).

[0027] AsFigures 1 to 4 As depicted in, the snow wing assembly 130 is configured to selectively move between various deployed positions and various stowed positions. For example, as Figure 1 , Figure 2 and Figure 4 depicted, the plow blade 135 of the snow wing assembly 130 is deployed away from the first side 105 of the motor grader 100 such that the plow blade 135 can engage the working material. The plow blade 135 is positioned at the working table height 200 above the ground surface 170. The outer side surface 150 of the plow blade 135 is spaced apart from the first side 105 by a distance 205. The bottom 145 of the plow blade 135 is inclined at the inclination angle 210 relative to the link assembly 165, the first side 105, or a certain vertical axis. Each of the working table height 200, the distance 205, and the inclination angle 210 is configured to be independently controlled by the link assembly 165. In other embodiments, the working table height 200, the distance 205, and the inclination angle 210 change together or simultaneously. The link assembly 165 is configured to selectively change the working table height 200 and the inclination angle 210, while the rear link assembly 410 is configured to selectively change the distance 205 and the angle 435. Since each of the working table height 200, the distance 205, the inclination angle 210, and the angle 435 is variable, a plurality (e.g., an unlimited number) of deployed positions of the snow wing assembly 130 are possible.

[0028] The stowed position of the snow wing assembly 130 is as depicted in Figure 3 and is characterized by the positioning of the plow blade 135 close to the first side 105 of the motor grader 100. In the stowed position, the plow blade 135 is oriented parallel or substantially parallel (e.g., within ±15° of parallel) to, for example, the centerline 400 of the motor grader 100. Similarly, the plow blade 135 is oriented parallel or substantially parallel (e.g., within ±15° of parallel) to the roadside (e.g., the curb or guardrail of the road on which the motor grader 100 can travel). The plow blade 135 is positioned at the working table height 200, which is higher than the rear wheels 310 or the rear fenders 315 of the motor grader 100 in the stowed position depicted in Figure 3 . In this way, the plow blade 135 closes in towards the cab 120 and the first side 105 of the motor grader 100 rather than extending outwardly away from the motor grader 100. For example, when the motor grader 100 is in a maneuvering (e.g., traveling, non-working) operation, the plow blade 135 is stowed towards the first side 105 of the motor grader 100 and away from roadside obstacles (e.g., road signs, trees, other vehicles).

[0029] Now refer to Figures 5 to 9, shows the snow wing assembly 130 in more detail, with the motor grader 100 removed. The snow wing assembly 130 is a tool (e.g., attachment, assembly) configured to be installed on the motor grader 100 as an aftermarket part (e.g., from a non - OEM source) or as a factory - installed option (e.g., from an OEM). The linkage assembly 165 is coupled to the underside 300 of the motor grader 100 via a first mounting member 550. The first mounting member 550 is coupled to (e.g., welded, fastened, or otherwise coupled to) or integral with the underside 300 of the frame 102 of the motor grader 100. As Figure 5 depicted in, the first mounting member 550 includes a plurality of fasteners or a plurality of openings configured to receive fasteners to couple the linkage assembly 165 to the first mounting member 550 such that the linkage assembly 165 can be installed on the motor grader 100 to extend from the first side 105 or from the second side 110. The rear linkage assembly 410 is coupled to the rear 305 of the motor grader 100 via a second mounting member 555. The second mounting member 555 is coupled to (e.g., welded, fastened, or otherwise coupled to) or integral with the rear 305 of the motor grader 100. The rear linkage assembly 410 is coupled to the second mounting member 555 via a rear mount 430. The second mounting member 555 includes a plurality of fasteners or a plurality of openings configured to receive fasteners to couple the rear linkage assembly 410 to the second mounting member 555 such that the rear linkage assembly 410 can be installed on the motor grader 100 to extend from the first side 105 or from the second side 110.

[0030] The linkage assembly 165 includes a plurality of linkages. According to an exemplary embodiment, the linkage assembly 165 is a four-bar linkage having four linkages. The linkage assembly 165 includes a first linkage 500, a second linkage 505 pivotally coupled to the first linkage 500, a third linkage 510 pivotally coupled to the first linkage 500, and a fourth linkage 515 pivotally coupled to both the second linkage 505 and the third linkage 510. The inner side surface 155 of the plow blade 135 is pivotally coupled to the first linkage 500 at a first pivot joint 520 and is configured to rotate about a first axis 720. The first axis 720 may be an angular axis 720. Specifically, the rear linkage actuator 415 is configured to extend to rotate the outer side surface 150 of the plow blade 135 about the angular axis 720. In this way, the linkage assembly 165 is configured to pivot the plow blade 135 outwardly or inwardly at an angle 435 about the angular axis 720 of the first pivot joint 520. For example, the rear linkage assembly 410 is configured to selectively pivot the plow blade 135 in an outward direction about the angular axis 720 when the rear linkage actuator 415 extends, such that the outer side surface 150 of the plow blade 135 is positioned away from the first side 105 of the motor grader 100. The rear linkage assembly 410 is configured to selectively pivot the plow blade 135 in an inward direction about the angular axis 720 when the rear linkage actuator 415 retracts, such that the outer side surface 150 of the plow blade 135 is positioned toward the first side 105 of the motor grader 100.

[0031] The second linkage 505 is coupled to the first linkage at a second pivot joint 525 and is configured to rotate about a second axis 725. The second axis 725 is an inclined axis 725. The third linkage 510 is coupled to the first linkage 500 at a third pivot joint 530 and is configured to rotate about a third axis 730. The second linkage 505 is coupled to the fourth linkage 515 at a fourth pivot joint 535 and is configured to rotate about a fourth axis 735. The third linkage 510 is coupled to the fourth linkage 515 at a fifth pivot joint 540 and is configured to rotate about a fifth axis 740. The fourth linkage 515 is rigidly (e.g., non-pivotally) coupled to the first mounting member 550 via a support member 545. The support member 545 extends outwardly from the first mounting member 550 and from the lower side 300 of the frame 102 coupled to the first mounting member 550. As Figures 5 to 7 depicted in, etc., the support member 545 extends vertically from the first mounting member 550 and includes a surface (e.g., a plate) to which the fourth linkage 515 is coupled, wherein the surface is angled relative to the first mounting member 550. In other embodiments, the support member 545 may extend non-vertically from the first mounting member 550.

[0032] As Figure 5As depicted, the rear linkage assembly 410 includes at least one pressure relief valve 560. The pressure relief valve 560 is fluidly coupled to the rear linkage actuator 415. The pressure relief valve 560 includes an inlet that is exposed to pressurized hydraulic fluid associated with the rear linkage actuator 415 such that the hydraulic pressure borne by the pressure relief valve 560 corresponds to the hydraulic pressure of the rear linkage actuator 415. When the pressure associated with the rear linkage actuator 415 exceeds a threshold pressure (e.g., opening pressure), the pressure relief valve 560 is configured to release the pressure associated with the rear linkage actuator 415 by selectively allowing hydraulic fluid to pass from the inlet to a low-pressure outlet. In some embodiments, the pressure relief valve 560 is an adjustable pressure relief valve having an opening pressure (e.g., maximum pressure) selected by an operator, such as by adjusting the spring biasing force of the pressure relief valve 560. The role of the pressure relief valve 560 is to prevent the pressure within the rear linkage actuator 415 from exceeding a threshold, where the threshold amount is the opening pressure of the pressure relief valve 560. For example, the pressure relief valve 560 is configured to prevent sudden pressure spikes. For example, during operation of the snow wing assembly 130 and the associated motor grader 100, when the plow blade 135 contacts a stationary or heavy object (e.g., a rock, a tree, or some other obstacle), a sudden pressure increase occurs, which exerts a large force on the rear linkage actuator 415, which in turn increases the pressure within the rear linkage actuator 415. When exposed to a pressure spike, i.e., a pressure that is above the threshold pressure, the pressure relief valve 560 will open to reduce the pressure borne by the rear linkage actuator 415, thereby reducing the likelihood of damage to the rear linkage actuator 415, the rear attachment 430, or any other associated components. For example, by releasing the pressure in the rear linkage actuator 415, the pressure relief valve 560 is configured to allow the rear linkage actuator 415 to retract and rotate the plow blade 135 inwardly (e.g., toward the first side 105 of the motor grader 100). In this arrangement, a shear pin (e.g., a pin configured to shear when exposed to a high force) that couples the second end 425 of the rear linkage actuator 415 to the rear attachment 430 is not required because the pressure relief valve 560 reduces the pressure within the rear linkage actuator 415 and thus the force it bears.

[0033] As Figure 5As depicted, the rear linkage assembly 410 includes at least one accumulator 565. The accumulator 565 is fluidly coupled to the rear linkage actuator 415 of the rear linkage assembly 410. The accumulator 565 includes a reservoir configured to contain a volume of hydraulic fluid and / or some other substance, such as a volume of gas (e.g., pressurized nitrogen or some other inert gas). For example, the accumulator 565 may include a bladder, diaphragm, piston, or some other device to separate a volume of hydraulic fluid from a second volume of nitrogen. The pressurized gas in the accumulator 565 may be configured to compress to absorb shocks associated with pressure peaks within the rear linkage actuator.

[0034] For example, during operation of the motor grader 100, when the plow blade 135 contacts a stationary or heavy object (e.g., a rock, tree, or some other obstacle), a sudden pressure increase occurs, which exerts a large force on the rear linkage actuator 415, which in turn increases the pressure within the rear linkage actuator 415. The accumulator 565 is fluidly coupled to the rear linkage actuator 415 such that an increase in pressure within the rear linkage actuator 415 will cause a corresponding increase in the pressure of the hydraulic fluid within the accumulator 565. The increased pressure of the hydraulic fluid within the accumulator 565 will cause the pressurized gas (e.g., nitrogen) to compress further. The compression of the pressurized gas will at least partially absorb the impact or shock force generated by the contact between the plow blade 135 and some other object. For example, the pressurized gas within the accumulator may compress a certain amount such that the rear linkage actuator 415 can retract a predetermined amount, such as six inches, ten inches, greater than ten inches, or less than six inches. By allowing the rear linkage actuator 415 to retract a predetermined amount, the accumulator 565 can allow the plow blade 135 to rotate inwardly (e.g., toward the first side 105 of the motor grader 100). The accumulator 565 may be used in place of or in combination with the relief valve 560. Like the relief valve 560, the accumulator 565 obviates the need for a shear pin (e.g., a pin configured to shear when exposed to a high force) that couples the second end 425 of the rear linkage actuator 415 to the rear mount 430, as the accumulator 565 absorbs the impact force experienced by the rear linkage actuator 415.

[0035] As Figure 6 and Figure 7As depicted in etc., the second link 505 includes a plate 600 coupled to one or more side members 605 (i.e., two side members 605). The two side members 605 extend perpendicular or substantially perpendicular to the plate 600 (e.g., ±15° from perpendicular). The side members 605 define one or more openings 610 that pass through the side members 605 and provide access to the area between the two side members 605. The side members 605 are pivotally coupled to the first link 500 at a second pivot joint 525, pivotally coupled to the fourth link 515 at a fourth pivot joint 535, and the plate 600 is coupled to the lower sides of the two side members 605. The second link 505 includes an actuator 700 shown as a hydraulic actuator 700 (e.g., a hydraulic piston cylinder actuator) disposed between the two side members and above the plate 600. The actuator 700 includes a first outer end 760 (e.g., a rod end) and a second inner end 765 (e.g., a cylinder end), the first outer end being coupled to the plate 600 proximal to the second pivot joint 525, the second inner end being pivotally coupled to the fourth link 515 and configured to rotate about an axis 770. The axis 770 is offset from the fourth axis 735 by a distance (e.g., one to six inches, greater than six inches, or some other distance). As Figure 7 As depicted in etc., the second link 505 further includes a first outer end 750 pivotally coupled to the first link 500 at the second pivot joint 525. The second link 505 further includes a second inner end 755 pivotally coupled to the fourth link 515 at the fourth pivot joint 535. The second link 505 is a rigid, non-extendable link. In other examples, the actuator 700 can be another type of actuator, such as a screw drive, a belt drive, a rack and pinion device, a pneumatic actuator, or some other device.

[0036] The hydraulic actuator 700 is fluidly coupled to a hydraulic control system (e.g., a hydraulic control valve or some other device) via at least one hydraulic hose (e.g., a line, a conduit, a lumen). As Figure 7As depicted in the like, the hydraulic actuator 700 is coupled to a first hydraulic hose 775 and a second hydraulic hose 780. The first hydraulic hose 775 is fluidly coupled to a first side of the hydraulic actuator 700, such as a piston side. For example, the first hydraulic hose 775 may supply hydraulic fluid to the hydraulic actuator 700 to extend the hydraulic actuator 700. The second hydraulic hose 780 is fluidly coupled to a second side of the hydraulic actuator 700, such as a rod side. For example, the second hydraulic hose 780 may supply hydraulic fluid to the hydraulic actuator 700 to retract the hydraulic actuator 700. The opening 610 of the side member 605 is configured to receive one or more of the first hydraulic hose 775 and the second hydraulic hose 780. For example, the first hydraulic hose 775 and the second hydraulic hose 780 are routed through the opening 610 of a side member 605 of the second link 505. When the link assembly 165 moves to articulate the plow blade 135, the side member 605 may protect the first hydraulic hose 775 and the second hydraulic hose 780 from being pinched or otherwise damaged.

[0037] The third link 510 includes a first outer end 710 that is coupled to the first link 500 at a third pivot joint 530 via a floating member 715. According to an exemplary embodiment, the third link 510 is an actuator 705, which is shown as a hydraulic actuator 705 (e.g., a hydraulic piston cylinder actuator). In other examples, the actuator 705 may be another type of actuator, such as a screw drive, a belt drive, a rack and pinion device, a pneumatic actuator, or some other device. According to an exemplary embodiment, the outer end 710 is the rod end of the actuator 705. The floating member 715 is configured to rotate about the third pivot joint 530. For example, the floating member 715 defines an opening at a first end that is configured to receive a pin of the third pivot joint 530 and rotate about a third axis 730. The floating member 715 further includes at least one opening at a second end that is configured to be coupled to the outer end 710 of the actuator 705 of the third link 510, as will be discussed in detail below with reference to Figures 10 to 12 The third link 510 includes a second inner end 745 (e.g., a cylinder end). According to an exemplary embodiment, the inner end 745 is the cylinder end of the actuator 705. The third link 510 is an extendable link. Specifically, the third link 510 is an actuator 705 and is configured to selectively extend (e.g., an increase in length) or retract (e.g., a decrease in length) such that the distance between the outer end 710 and the inner end 745 is variable.

[0038] Each of actuator 700, actuator 705, and rear link actuator 415 is a hydraulic cylinder in fluid communication with a hydraulic control system. For example, in some embodiments, actuator 700, actuator 705, and rear link actuator 415 are fluidly coupled to a hydraulic control valve (not shown). The hydraulic control valve is configured to actuate each of actuator 700, actuator 705, and rear link actuator 415 to perform various functions, as discussed below. In other examples, actuator 700, actuator 705, and rear link actuator 415 may be pneumatic actuators or some other linear actuator.

[0039] As Figure 8 and Figure 9 depicted in, etc., when actuator 700 extends or retracts, actuator 700 is configured to raise or lower plow blade 135. Actuator 700 performs the "lift" function of snow wing assembly 130. Specifically, the extension of actuator 700 will cause outer end 760 to extend relative to inner end 765, which will further cause second link 505 and third link 510 to pivot about fourth pivot joint 535 and fifth pivot joint 540, respectively. Since fourth axis 735 of fourth pivot joint 535 and fifth axis 740 of fifth pivot joint 540 are offset from cylinder axis 770, actuator 700 acts as a moment arm that is configured to cause rotation of second link 505 about fourth axis 735 of fourth pivot joint 535 and rotation of third link 510 about fifth axis 740 of fifth pivot joint 540, respectively. When second link 505 and third link 510 pivot about fourth pivot joint 535 and fifth pivot joint 540, respectively, outer end 750 and outer end 710 (via floating member 715) of second link 505 pivot freely about second pivot joint 525 and third pivot joint 530. In other words, the respective pivoting rotations of second link 505 and third link 510 about fourth pivot joint 535 and fifth pivot joint 540 do not affect the tilt angle 210 of plow blade 135. As Figure 8 shown, the extension of actuator 700 causes second link 505 and third link 510 to rotate downward to lower plow blade 135 toward ground surface 170, thereby reducing workbench height 200 and positioning snow wing assembly 130 in lowered position 800, while tilt angle 210 remains substantially constant (e.g., 90% constant). As Figure 9 shown, the retraction of actuator 700 causes second link 505 and third link 510 to rotate upward to raise plow blade 135 away from ground surface 170, thereby increasing workbench height 200 and positioning snow wing assembly 130 in raised position 900, while tilt angle 210 of plow blade 135 remains substantially constant (e.g., 90% constant).

[0040] The actuator 705 of the third link 510 is configured to tilt the plow blade 135 about the tilt axis 725. The actuator 705 performs the "tilt" function of the snow wing assembly 130. Specifically, the extension of the actuator 705 (e.g., an increase in the distance between the outer end 710 and the inner end 745) will cause the first link 500 to rotate about the tilt axis 725. The rotation of the first link 500 about the tilt axis 725 causes a corresponding rotation of the first pivot joint 520 about the tilt axis 725, which in turn causes a corresponding rotation of the plow blade 135 about the tilt axis 725. For example, the extension of the actuator 705 of the third link 510 causes the plow blade 135 to tilt downward. Specifically, the extension of the actuator 705 of the third link 510 tilts the plow blade 135 by lowering the outer side surface 150 of the plow blade 135 relative to the inner side surface 155. For example, the extension of the actuator 705 of the third link 510 can change the orientation of the angular axis 720 of the first link 500 relative to the ground surface 170. On the other hand, the retraction of the actuator 705 of the third link 510 will cause the first link 500 and the plow blade 135 to tilt upward. Specifically, the retraction of the actuator 705 of the third link 510 tilts the first link 500 and the plow blade 135 by raising the outer side surface 150 relative to the inner side surface 155. For example, the retraction of the actuator 705 of the third link 510 can change the orientation of the angular axis 720 of the first link 500 relative to the ground surface 170. The adjustable (e.g., extendable) nature of the third link 510 allows the plow blade 135 to tilt without any pivot member protruding through the surface 160 of the plow blade 135. Instead, when adjusting the third link 510, the plow blade 135 is configured to pivot about the tilt axis 725 of the link assembly 165.

[0041] As Figure 8As depicted in the like, the fourth link 515 defines at least one orifice 805 (e.g., a first orifice 805). The orifice 805 is a through-hole that defines a diameter configured to receive a pin 810. The orifice 805 is positioned along a side of the fourth link 515 between a fourth pivot joint 535 and a fifth pivot joint 540. In other embodiments, the fourth link 515 may include multiple orifices 805 that are differently positioned on the side of the fourth link 515, including beneath the fourth pivot joint 535, above the fifth pivot joint 540, and between the fourth pivot joint 535 and the fifth pivot joint 540. The second link 505 includes at least one orifice 815 shown as a circular opening. The orifice 815 is an opening that extends through one of the two side members 605. In other embodiments, the orifice 815 may be an opening that only partially extends through the side member 605. The orifice 815 defines a diameter that is similar in diameter (e.g., within 25% of its diameter) to the diameter of the orifice 805 defined by the fourth link 515. The orifice 815 is configured to receive the pin 810. In some embodiments, the orifice 815 or the orifice 805 may have a circular cross-sectional shape or some other cross-sectional shape, such as rectangular, star-shaped, oval-shaped, or some other shape. The pin 810 is coupled to the support member 545 via a chain (e.g., a rope, tether, wire, or some other flexible connector). The support member 545 includes a bracket shown as a horizontally disposed plate with a through-hole to removably hold the pin 810. In other embodiments, the pin 810 may be coupled to the fourth link 515 or the linkage assembly 165 or some other component of the motor grader 100. In yet other embodiments, the pin 810 is not coupled to any component of the linkage assembly 165 or the motor grader 100, but rather the pin 810 is provided separately.

[0042] In Figure 8 the like, the snow wing assembly 130 is shown in the lowered position 800. In the lowered position 800, the orifice 805 of the fourth link 515 and the orifice 815 of the second link 505 are not aligned. Specifically, when the snow wing assembly 130 is in the lowered position 800, the orifice 805 of the fourth link 515 and the orifice 815 of the second link 505 are not concentric. Thus, the pin 810 cannot be received in both the orifice 805 and the orifice 815 simultaneously. In Figure 9In [description], the snow wing assembly 130 is shown in the raised position 900. In the raised position 900, the aperture 805 of the fourth link 515 and the aperture 805 of the second link 505 are not axially aligned. For example, the aperture 815 and the aperture 805 are aligned substantially concentrically (e.g., ±95% concentric) such that both the aperture 815 and the aperture 805 are configured to receive the pin 810 simultaneously. The pin 810 is configured to prevent rotation of the second link 505 relative to the fourth link 515, where the pin 810 is inserted into both the aperture 805 of the fourth link 515 and the aperture 815 of the second link 505. For example, the pin 810 will hold the snow wing assembly 130 in the raised position 900, where the pin 810 is inserted through the aperture 805 and into the aperture 815. In this way, the pin 810 will serve to hold the plow blade 135 raised above the ground surface 170, as is the case when the snow wing assembly 130 is stowed or not in use (e.g., when the motor grader 100 is traveling in the road mode).

[0043] In Figures 10 to 12Among others, the floating member 715 of the link assembly 165 is shown. As described above, the third link 510 includes an actuator 705 that also includes an outer end 710 coupled to the first link 500 at the third pivot joint 530 and an inner end 745 (not shown) coupled to the fourth link 515 at the fifth pivot joint 540. The outer end 710 is rotatably coupled to the third pivot joint 530 via the floating member 715. The floating member 715 is positioned between the outer end 710 of the actuator 705 and the third pivot joint 530. The floating member 715 includes a slot 1000 configured to receive the outer end 710 of the actuator 705. The floating member 715 includes a first slot member 1010 spaced apart from a second slot member 1010. Each slot member 1010 defines the slot 1000. The slot 1000 of the first slot member 1010 is substantially aligned (e.g., ±95% aligned or concentric) with the slot 1000 of the second slot member 1010. The first slot member 1010 and the second slot member 1010 are configured to receive the outer end 710 of the actuator 705 with a space therebetween. A pin 1030 is inserted through the slot 1000 of the first slot member 1010, a hole defined by the outer end portion 710 of the actuator 705, and finally through the slot 1000 of the second slot member 1010. A locking ring 1035 is fixed to an opposite end of the pin 1030 to hold the pin 1030 within the slot 1000. In this configuration, the outer end 710 of the actuator 705 is pivotally coupled to the pin 1030, and the pin 1030 is slidably coupled to the floating member 715 via the slot 1000 defined by the first slot member and the second slot member 1010. Specifically, the pin 1030 and the outer end 710 of the actuator 705 coupled to the pin 1030 are configured to slide in the direction 1005 within the slot 1000. In some embodiments, the length of the slot 1000 is one inch, two inches, or more than two inches to allow a corresponding movement of the pin 1030 in the direction 1005 within the one-inch, two-inch, or more-than-two-inch slot 1000.

[0044] Since the outer end 710 of the actuator 705 is configured to slide (e.g., translate) in the direction 1005 via the floating member 715, the first link 500 is permitted to rotate a relatively small amount (e.g., less than 30°) about the second pivot joint 525 to move the third pivot joint 530 toward or away from the outer end 710 of the actuator 705. The permitted rotation of the first link 500 achieved by the movement of the outer end 710 within the slot 1000 of the floating member 715 corresponds to the tilting (e.g., rotation) of the plowshare 135 about the second pivot joint 525. If the bottom 145 of the plowshare 135 contacts an obstacle (e.g., a bump, a rock, an oblique, a drop, a leveling change along the bottom 145 of the plowshare, or some other obstacle), the floating member 715 allows the outer side surface 150 of the plowshare 135 to tilt upward or downward to overcome the obstacle or maintain contact with the ground surface 170 or the working material. For example, as Figure 12 depicted in, the floating member 715 allows the plowshare 135 to move (e.g., tilt) between the first position 1200 and the second position 1205 without any actuation of the actuator 705 of the third link 510. In this way, the plowshare 135 is permitted to "float" along the ground surface 170 during operation.

[0045] As Figure 10 depicted in etc., the first link 500 is pivotally coupled to the plowshare 135 via the first pivot joint 520. The first pivot joint 520 includes a pin 1015 received in a hole 1025 extending from the first link 500 and apertures formed in two plates 1040 protruding from the plowshare 135. The hole 1025 of the first link 500 is positioned between the two plates 1040 of the plowshare 135. A locking ring 1045 is fixed to opposite ends of the pin 1015 to hold the pin 1015 within the apertures formed by the plates 1040 and within the hole 1025. The length of the hole 1025 is less than the distance between the two plates 1040. Accordingly, the hole 1025 and the first link 500 from which the hole 1025 extends are configured to slide along the pin 1015 between the plates 1040 of the plowshare 135 in the direction 1020. In many cases, gravity will hold the top of the hole 1025 in abutting engagement with the underside of the topmost plate 1040. However, if the plowshare 135 encounters an obstacle (e.g., a bump, a rock, an oblique, a drop, a leveling change along the bottom 145 of the plowshare, or some other obstacle), the plowshare 135 is permitted to move (e.g., lift) in the direction 1020 to overcome the obstacle. In this way, the plowshare 135 is further configured to "float" along the ground surface 170 during operation.

[0046] Now referring to Figure 13, the cab 120 of the motor grader 100 includes at least one window 1300. The plow blade 135 is positioned at least partially across the window 1300, with the snow wing assembly 130 in the stowed position. For example, in the stowed position, the plow blade 135 is folded back towards the first side 105 of the motor grader 100 such that the back side 440 of the plow blade 135 faces the window 1300 of the cab 120. The bottom 145 of the plow blade 135 is positioned substantially horizontally (e.g., ±15° from horizontal) across the window 1300, with the snow wing assembly 130 in the stowed position. Thus, an operator positioned within the cab 120 (e.g., the operator operating the motor grader 100) will have a view that is at least partially blocked by the plow blade 135. However, as discussed above with respect to Figure 3 Since the linkage assembly 165 extends at an angle 405 relative to the centerline 400 of the motor grader 100, and since the rear linkage assembly 410 includes a retractable rear linkage actuator 415, the stowed position includes the plow blade 135 positioned against the first side 105 of the motor grader 100 (e.g., within two feet thereof), with the bottom 145 oriented substantially horizontally. In this orientation, the upper viewing portion 1305 of the window 1300 is above the top 140 of the plow blade 135. The upper viewing portion 1305 allows the operator to clearly see above the plow blade 135, which further provides the operator with a clear line of sight to the first side 105 of the motor grader. Similarly, the lower viewing portion 1310 of the window 1300 is below the bottom 145 of the plow blade 135. The lower viewing portion 1310 allows the operator to clearly see below the bottom 145 of the plow blade 135, which further provides the operator with a clear line of sight to the ground surface 170. Additionally, the lower viewing portion 1310 allows the operator to see the floating member 715 and the pin 1015 such that the operator can easily determine if the plow blade 135 is floating.

[0047] Now refer to Figure 14, in an alternative embodiment, the rear link assembly 410 and the first link 500 are shown. According to this embodiment, the second end 425 of the rear link actuator 415 is coupled to the first link 505, rather than being coupled to the rear mount 430. The first link 505 may include a mounting member 1400 that is configured to be coupled to the second end 425 of the rear link actuator 415. The mounting member 1400 may be a portion, region, or feature of the first link 505 that is spaced apart from the back side 440 of the plow blade 135. Since the mounting member 1400 is spaced apart from the back side 440 of the plow blade 135, the rear link actuator 415 is oriented at an angle relative to the plow blade 135. When the rear link actuator 415 extends, the plow blade 135 pivots about the first pivot joint 520 to rotate the plow blade 135 in an outward direction (e.g., away from the first side 105 of the motor grader 100). When the rear link actuator 415 retracts, the plow blade 135 pivots about the first pivot joint 520 to rotate the plow blade 135 in an inward direction (e.g., toward the first side 105 of the motor grader 100). In this embodiment, the snow wing assembly 130 is not coupled to the rear portion 305 of the motor grader 100. Instead, the snow wing assembly 130 is coupled to the motor grader 100 via a link assembly 165 that is coupled to the underside 300 of the motor grader 100, as discussed above. Since the snow wing assembly 130 is not coupled to the rear portion 305 of the motor grader 100, the snow wing assembly 130 can be stowed close to the motor grader 100 or positioned to improve operator visibility.

[0048] Industrial Applicability

[0049] The disclosed solution has several industrial applications. Generally, the snow wing assembly 130 is configured for use with a machine (such as a motor grader 100) during snow removal operations, road grading operations, gravel cleaning operations, or any other operation that uses a machine to move a working material (e.g., dirt, snow, gravel, sand, or some other working material). In particular, the snow wing assembly 130 is configured to act as an auxiliary or secondary blade to engage a working material positioned at the side of the machine. For example, the snow wing assembly 130 is configured to engage a working material to one side of the machine to push (e.g., plow) the working material to one side of the machine, as in the case of removing snow from a road surface during a snow removal operation.

[0050] The disclosed solution also includes a linkage assembly 165 and a rear linkage assembly 410 to actuate the plow blade 135 of the snow wing assembly 130. Specifically, the linkage assembly 165 is a four-bar linkage system that includes an adjustable (e.g., extendable) third link 510 that is configured to rotate the first link 500 about an inclination axis 725 of a second pivot joint 525. By rotating the first link 500 about the inclination axis 725, the adjustable third link 510 causes the plow blade 135 to tilt via the four-bar linkage (e.g., raise or lower the outer side surface 150 relative to the inner side surface 155). Since this functionality is incorporated within the linkage assembly 165 (i.e., the four-bar linkage assembly), no separate link or hydraulic actuator is required to perform the tilting function. Additionally, the second pivot joint 525 about which the first link 500 rotates is part of the linkage assembly 165 rather than a separate pivot joint (e.g., a pivot joint protruding through the surface 160 of the plow blade). The linkage assembly 165 also includes a floating member 715 coupled to the adjustable third link 510 that allows the plow blade 135 to tilt a certain amount (e.g., from about 1° to about 15°) without extending or retracting the actuator 705 of the third link 510. Further, the snow wing assembly 130 includes a first link 500 that slidably engages and floats on a pin 1030 of a first pivot joint 520, e.g., the first link allows the plow blade to raise or lower a certain amount without operating the actuator 700 of the second link 505. Thus, the plow blade 135 floats along the ground surface 170 to facilitate an improved engagement between the plow blade 135 and the working material. Similarly, the floating connections of the floating member 715 and the first link 500 to the first pivot joint 520 allow the plow blade 135 to easily move over obstacles (e.g., rocks, bumps, gravel, ice, or other obstacles) that might otherwise impede the operation of or damage the snow wing assembly 130.

[0051] The snow wing assembly 130 includes a rear link assembly 410 to adjust the angle of the plow blade 135. The rear link assembly 410 includes a rear link actuator 415 that, for example, extends to rotate the plow blade 135 away from the motor grader 100 in an outward direction. The rear link assembly 410 includes a rear link actuator 415 that, for example, retracts to rotate the plow blade 135 toward the motor grader 100 in an inward direction. The rear link assembly 410 does not include a rigid link that connects the plow blade 135 to the motor grader 100. Similarly, the rear link assembly 410 does not include a shear pin that couples the rear link assembly 410 to the motor grader 100. Instead, the rear link assembly 410 includes an adjustable (e.g., telescoping) rear link actuator 415 positioned between the plow blade 135 and the motor grader 100. The rear link actuator 415 retracts to pull the plow blade toward the motor grader 100 to a stowed position. Because the rear link assembly 410 includes a retractable adjustable rear link actuator rather than a rigid or non-extendable link, the plow blade 135 is configured to stow closely to the motor grader 100 (e.g., within one foot, within two feet, or within some other distance). Similarly, the plow blade 135 is configured to stow in a substantially horizontal position with the bottom 145 of the plow blade 135. The rear link assembly 410 includes a pressure relief valve 560 that is fluidly coupled to the rear link actuator 415 and is configured to release the pressure within the rear link actuator 415 in the event of a pressure peak. In this manner, when the plow blade 135 is subjected to an impact force generated by contact with a rigid obstacle (e.g., a rock, a tree, or some other obstacle), the pressure within the rear link actuator 415 is reduced via the pressure relief valve 560, thereby allowing the rear link actuator 415 to retract to dynamically absorb the impact force. By absorbing the impact force in this manner, shear pins (e.g., pins configured to break in response to an impact force) are not used, and there is no need to tediously replace shear pins.

[0052] The snow wing assembly 130 provides improved operator visibility in several respects. For example, when the bottom 145 of the plow blade 135 engages the working material, the snow wing assembly 130 provides improved visibility of the bottom 145. The linkage assembly 165 of the snow wing assembly 130 is configured to extend at an angle 405 from the centerline 400 of the motor grader 100 or some other machine. Because the linkage assembly 165 is angled relative to the centerline 400, an operator within the cab 120 of the motor grader 100 has visibility of at least a portion of the floating member 715, the pin 1030, and the bottom 145 of the plow blade 135. For example, an operator can observe when the plow blade 135 is "floating" by observing the position of the outer end 710 of the actuator 705 within the slot 1000 of the floating member 715, or by observing the position of the plate 1040 of the plow blade 135 relative to the hole 1025 of the first linkage 500. This increased visibility provides the operator with increased awareness of the machine's functionality.

[0053] When the snow wing assembly 130 is in the stowed position, the snow wing assembly 130 also provides improved visibility around the plow blade 135 (e.g., above and below). For example, the plow blade 135 is configured to be positioned against the first side 105 of the motor grader 100 (e.g., within one foot, two feet, or some other distance), such that the plow blade 135 extends across at least a portion of the window 1300 of the cab 120. The rear linkage assembly 410 and the linkage assembly 165 are configured to position the plow blade 135 horizontally (e.g., substantially horizontal with the bottom 145), such that a larger portion of the window 1300 is unobstructed, rather than extending across the window 1300 in an upward or angled direction. Specifically, the upper viewing portion 1305 provides the operator with visibility above the top 140 of the plow blade 135, and the lower viewing portion 1310 provides the operator with visibility below the bottom 145 of the plow blade 135. When the snow wing assembly 130 is in the stowed position, the upper viewing window 1305 and the lower viewing window 1310 together provide increased visibility for an operator within the cab 120.

[0054] The snow wing assembly 130 is configured to allow an operator to control the tilt orientation, lift orientation, and angular orientation independently of each other. Specifically, actuation of the actuator 705 to tilt the plow blade 135 (e.g., raise or lower the outer side surface 150 relative to the inner side surface 155) can be performed independently of any actuation of the actuator 700 to change the working height 200 of the plow blade 135 (e.g., raise or lower the plow blade 135 relative to the ground surface 170). For example, the actuator 705 is capable of tilting the plow blade 135 without affecting or requiring any corresponding change in the working height 200 of the plow blade 135 by the actuator 700. The linkage assembly 165 and the rear linkage assembly 410 are configured for a one-to-one relationship between actuation of the actuator and movement of the plow blade 135 such that actuation of one actuator (e.g., the actuator 705) causes movement of the plow blade 135 in one direction (e.g., rotation about the tilt axis 725 to tilt the plow blade 135). In this way, the operator can control the snow wing assembly 130 with greater precision and in a more simplified manner.

[0055] As used herein with respect to numerical ranges, the terms "approximate," "about," "substantially," and similar terms generally mean + / - 10% of the disclosed value, unless otherwise stated. As used herein with respect to structural features (e.g., describing shape, size, orientation, direction, relative position, etc.), the terms "approximate," "about," "substantially," and similar terms are intended to cover, for example, minor variations in structure that may occur during manufacturing or assembly processes and are intended to have a broad meaning consistent with the common usage accepted by those of ordinary skill in the art to which the subject matter of the present invention pertains. Accordingly, these terms should be interpreted as indicating that non-substantive or immaterial modifications or alterations to the described and claimed subject matter are considered to be within the scope of the present invention as set forth in the appended claims.

[0056] It should be noted that the term "exemplary" and its variants as used herein to describe various embodiments are intended to indicate that such embodiments are possible examples, representations, or illustrations of possible embodiments (and such terms are not intended to imply that such embodiments are necessarily exceptional or superlative examples).

[0057] As used herein, the term "coupled" and variations thereof mean that two components are directly or indirectly connected to each other. Such connection can be stationary (e.g., permanent or fixed) or movable (e.g., removable or releasable). Such connection can be achieved by: two components being directly connected to each other; two components being connected to each other using a separate intermediate component and any additional intermediate components; or two components being connected to each other using an intermediate component integrally formed as a single unit with one of the two components. If "coupled" or variations thereof are modified by additional terms (e.g., directly coupled), the general definition of "coupled" provided above is modified by the plain language meaning of the additional term (e.g., "directly coupled" means that two components are connected without any separate intermediate component), thereby resulting in a definition that is narrower than the general definition of "coupled" provided above. Such coupling can be mechanical, electrical, or fluidic.

[0058] References herein to the position of elements (e.g., "top", "bottom", "above", "below") are for purposes of describing the orientation of the various elements in the drawings only. It should be noted that, depending on other exemplary embodiments, the orientation of the various elements can be different, and such variations are intended to be covered by the present invention.

[0059] It is important to note that the construction and arrangement of the snow wing assembly 130 and its components as shown in the various exemplary embodiments are illustrative only. Additionally, any element disclosed in one embodiment can be combined with or utilized with any other embodiment disclosed herein.

Claims

1. A snow wing assembly for a machine, comprising: moldboard; as well as A connecting rod assembly, the connecting rod assembly comprising: a first link coupled to the moldboard; a second link pivotally coupled to the first link at a first outboard end of the second link; a third link pivotally coupled to the first link at a second outboard end of the third link; and a fourth link coupled to the machine and pivotally coupled to the first inboard end of the second link and the second inboard end of the third link; Wherein, the third link is selectively adjustable to change a distance between the second outboard end and the second inboard end for tilting the moldboard.

2. The snow wing assembly according to claim 1, wherein: The linkage assembly extends non-perpendicularly from a centerline of the machine.

3. The snow wing assembly of any one of claims 1 and 2, the second link comprising a hydraulic actuator and at least one side member, the at least one side member defining an opening configured to receive at least one hydraulic hose in fluid communication with the hydraulic actuator.

4. A snow wing assembly according to any one of claims 1 to 3, wherein: The third link is a second hydraulic actuator, the moldboard includes an outboard side and an inboard side opposite the outboard side, wherein retraction of the second hydraulic actuator is configured to tilt the outboard side upward relative to the inboard side.

5. The snow wing assembly according to any one of claims 1 to 4, wherein: The first outboard end of the second link is coupled to the first link at a pivot joint, and the second outboard end of the third link is coupled to the first link via a floating member slidably coupled to the second outboard end to allow the moldboard to freely rotate an amount about the pivot joint.

6. A snow wing assembly according to any one of claims 1 to 5, wherein: The moldboard is pivotally coupled to the first link at a pivot joint, and the linkage assembly further includes a rear linkage assembly including an actuator configured to selectively rotate the moldboard about the pivot joint relative to the first link to rotate the moldboard between a deployed position and a stowed position.

7. The snow wing assembly of claim 6, the moldboard including a bottom, the actuator being configured to retract to move the moldboard to a stowed position, the stowed position including the bottom of the moldboard positioned substantially parallel to a ground surface and positioned above the rear wheels of the machine.

8. A connecting rod assembly for a machine, comprising: a first link defining a first axis; a second link pivotally coupled to the first link at a first outboard end of the second link; a third link pivotally coupled to the first link at a second outboard end of the third link; as well as a fourth link configured to be coupled to the machine, the fourth link being pivotally coupled to the first inboard end of the second link and the second inboard end of the third link, Wherein, the third link is selectively adjustable to change the orientation of the first axis relative to a ground surface.

9. The connecting rod assembly according to claim 8, wherein: The third link may extend to rotate the first link about a second axis, wherein the second link is coupled to the first link at the second axis.

10. The connecting rod assembly according to any one of claims 8 and 9, wherein: At least the second link includes a hydraulic actuator that is selectively adjustable to rotate the second link relative to the fourth link.

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