CA1147953A - Swing over snow wing - Google Patents
Swing over snow wingInfo
- Publication number
- CA1147953A CA1147953A CA000405649A CA405649A CA1147953A CA 1147953 A CA1147953 A CA 1147953A CA 000405649 A CA000405649 A CA 000405649A CA 405649 A CA405649 A CA 405649A CA 1147953 A CA1147953 A CA 1147953A
- Authority
- CA
- Canada
- Prior art keywords
- blade
- bracket
- rotation
- arm
- wing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
- E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
- E01H5/06—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades
- E01H5/067—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades by side-wing snow-plough blades
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7663—Graders with the scraper blade mounted under a frame supported by wheels, or the like
- E02F3/7686—Graders with the scraper blade mounted under a frame supported by wheels, or the like with the vertical centre-line of the scraper blade disposed laterally relative to the central axis of the frame
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Body Structure For Vehicles (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
There is provided an improved wing plough apparatus for attachment to a road maintenance vehicle comprising at least one support member adapted to be secured to said vehicle and including forward and rearward longitudinally spaced points for pivotal connection of a wing blade and a wing blade pivotally connected at said two points to said at least one member for rotation about an axis parallel to the longitudinal axis of said vehicle, said first pivotal connection at said forward point comprising a first bracket secured to the inner end of said blade and pivotally connected at said forward point; and said second pivotal connection comprising a bell crank pivotally connected at its centre pivot to said rearward point and rigidly connected relative to its direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said at least one support member, whereby the action of said hydraulic cylinders causes the rotation of said bell crank and hence of said blade about said parallel axis.
There is provided an improved wing plough apparatus for attachment to a road maintenance vehicle comprising at least one support member adapted to be secured to said vehicle and including forward and rearward longitudinally spaced points for pivotal connection of a wing blade and a wing blade pivotally connected at said two points to said at least one member for rotation about an axis parallel to the longitudinal axis of said vehicle, said first pivotal connection at said forward point comprising a first bracket secured to the inner end of said blade and pivotally connected at said forward point; and said second pivotal connection comprising a bell crank pivotally connected at its centre pivot to said rearward point and rigidly connected relative to its direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said at least one support member, whereby the action of said hydraulic cylinders causes the rotation of said bell crank and hence of said blade about said parallel axis.
Description
~79S3 This application is a divison of Application Serial No.
360,641.
This invention relates to a wing plough for a road maintenance or the like vehicle.
Snow removal in northern areas is a perennnial problem in the solution of which improved methods and equipment are continuously being sought. One commonly used implement in snow removal from roads, etc., is the snow wing. The wing is often used in combination with a front-mounted blade or the like to enable the machine to sweep a wider area with the blades and to enable snow to be pushed back beyond ditches and the like where the machine itself cannot safely travel.
These machines generally have the wing and assembly mounted adjacent the driver's cab and on the right hand side of the machine. In some cases a pair of similar wings are mounted on opposite sides of the machine giving the added versatility of being able to use a wing on either side without regard to the direction of travel of the machine.
The present invention is di rected toward the improvement of the control of the wing angle in these and similar situations whereby to increase the versatility of such wings. Improvements are obtained in a general sense and in such specialized applications as ditching.
PRIOR ART
Road machines such as graders or the like with hinged adjustable side wings are well known. For example, such devices are dealt with in Canadian patents 318,372; 411,010; and 514,047; and in U.S. patents 1,964,617; 1,994,817; 2,281,512; and 2,547,680. None of these deals with a wing attachment means such as that of the present ~79S3 invention. Generally these patents deal with arrangements wherein the outer end of the wing is supported from a vertical post or mast at the side of the vehicle. Such assemblies tend to be awkward and cumbersome, to obstruct the view of the operator, and to partially block entry and exit from the vehicle; and, specifically, are of limited versatility.
SUMMARY OF THE INVENTION
_~.
The present invention utilizes a bell crank arrangement to obtain an improved range of movement of a wing plough and to thus increase its versatility.
Thus, the invention provides a wing plough apparatus for attachment to a road maintenance vehicle comprising:
at least one support member adapted to be secured to said vehicle and including forward and rearward longitudinally spaced points for pivotal connection of a wing blade;
a wing blade pivotally connected at said two points to said at least one member for rotation about an axis parallel to the longitudinal axis of said vehicle~ said first pivotal connection at said forward point comprising a first bracket secured to the inner end of said blade and pivotally connected at said forward point; and said second pivotal connection comprises a bell crank pivotally connected at its centre pivot to said rearward point and rigidly connected relative to its direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank connected to a pair of oppositely acting hydraulic cylinders which are ~4795~
in turn rotatably secured to said at least one support member, whereby the action of said hydraulic cylinders causes the rotation of said bell crank and hence of said blade about said parallel axis.
In a further embodiment the invention provides a swing-over snow wing apparatus for operation on either side of a grad~r or like vehicle comprising a radial arm rotatably mounted at its inner end on a horizontal axis extending longitudinally from the rear of the vehicle; a wing blade rotatably mounted on the outer end of said arm, and means for rotating said arm through 180 to swing said wing blade from one side of the vehicle to the other; and wherein said radial arm has a section forwardly extending from its outer end and wherein said blade is rotatably attached to said arm for vertical rotation relative to the plane of said arm by means of two pivotal connections, a first of said connections comprising a first bracket secured to the inner end of said blade and rotatably connected to a forward part of said forwardly extending section of said arm and the second of said connections comprising a bell crank bracket rotatably connected at its centre pivot to said arm and rigidly connected relative to the direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank bracket connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said radial arm, whereby the rotation of said bell crank bracket and hence of said blade can be controlled.
BRIEF DESCKIPTION OF THE DRAWINGS
In drawings which illustrate embodiments of the invention:
Figure 1 is a rear elevation view of one embodiment of the apparatus according to the invention;
Figure 2 is a top plan view of the embodiment of Figure l;
Figure 3 shows in elevation detail of the bell crank mechanism of one embodiment of the present invention;
Figure 4 is a plan view of the embodiment of Figure 4;
Figure 5 illustrates the effect of the bell crank embodiment of Figure 3 and 4;
DETAILED DESCRIPTION OF THE INVENTION
The wing plough of the present invention may be utilized in a swing over configuration useable on both sides of the supporting vehicle; or in a conventional wing designed for use on one side only of a vehicle. The swing over use is described in greater detail because of the additional complexity of construction.
With reference to the drawings, the rear end of a grader 2 is shown in discontinuous lines. The framework 4 is attached to the rear end of the frame of grader 2. The particular configuration of the framework 4 is not of great significance other than that it be such as to provide support for the radial arm 6 and9 in a preferred embodiment, for the guide member 8.
Thus the framework 4 in the embodiment shown includes the vertical hollow structural sections 10 connected to the grader frame.
The sections 10 carry the transverse members 12 and 13 from the former of which longitudinally extending arms 14 emanate. Members 12 and 13 also carry centrally located transverse plate 15. The outer ~7953 ends of arms 14 in turn support the vertical arms 16 and the transverse members 17, 1~ and 21. The transverse plate 15 and member 21 provide bearing support for the centrally located longitudinally extending horizontal shaft 18.
The basic swing-over capability of the wing plough is achieved by rotation of the radial arm 6 about the shaft 18. The radial arm 6 is a hollow structural section pivoted at its inner end on the shaft 18 and being of such a length that its outer ~nd at any appropriate point in its rotation extends beyond the vehicle wheels in order to avoid interference with the wheels in operation. At its outer end the radial arm 6 has a forwardly extending section 20 giving the radial arm 6 an overall L-shaped configuration. The section 20 is also a hollow structural section rigidly secured to the outer reach of the arm 6 and at substantially a right angle thereto.
The means for effecting rotation of the radial arm 6 about the shaft 18 includes a substantially semi-circular guide member 8 preferably secured to the framework 4 between the radial arm 6 and the rear of the vehicle 2. The radial arm 6 has associated with it power transmission means which cooperates with guide member 8 to effect rotation.
Thus in the embodiment illustrated in Figure 1 the radial arm 6, which, as indicated, is preferably a hollow structural section, has secured within it a power transmission means comprising a hydraulic motor 22 and a gear reducer 24. The gear reducer 24 turns the shaft 26 which extends through the side of radial arm 6 and drives exterior to the arm 6 a gear wheel 28. Gear wheel 28 is in opera-795;;~
tional engagement with guide means 8.
For this purpose guide member 8 in the embodiment illustrated in Figure 1 has secured to the semi-circular periphery thereof a roller chain 30. The driven gear wheel 28 is in the form of a sprocket which engages the roller chain 30 to thereby cause the radial arm 6 to rotate on the shaft 18.
While the power transmission means 22 and the gear reducer 24 are preferably respectively an hydraulic motor and a worm-type reducer, any other suitable power transmission means is acceptable.
In a further preferred embodiment the semi-circular member 8 is provided with gear teeth 32 around its inner edge, and the gear wheel 28 engages the teeth to cause the radial arm 6 to rotate on the shaft 18. Clearly this embodiment requires that power transmission means 22 be located such that shaft 26 and gear wheel 28 pass through the side of radial arm 6 at a point different from the case where the roller chain 30 is utilized on the outside of the guide 8.
While the guide means 8 has been referred to as semi-circular or substantially semi-circular, these terms should both be taken to include the preferred embodiment wherein guide means 8 encompasses somewhat more than 180 . This allows the radial arm 6 to reach a point in its rotation somewhat below the horizontal, as illustrated, for example, in Figure 1. This provides clear advantages in terms of positioning the wing for some operating positinns, enabling the wing, for example, when used with the bell crank arrangement to be described below, to operate horizontally on the ~7~53 surface over which the machine is moving.
While the arrangement provided allows for the positioning of radial arm 6 for operating purposes at any desired point on guide means 8, it also permits the arm 6 to be moved to a vertical or near vertical position for convenient transport. The wing 38 in this situation is folded by means of the mechanism to be described to a position such that the longitudinal axis of the wing is parallel to that of the machine. The mechanism can be locked in this position for travelling by means of a locking pin inserted through hole 33 in guide means 8 and a cooperating hole through radial arm 6.
In order to provide full flexibility of operations of the wing, provision is preferably made for two axes of rotation of the wing about the radial arm 6. Thus, in the preferred embodiment a pair of axially aligned longitudinally disposed (relative to the direction of travel of the machine) pivot pins 34 and 36 are suitably supported near the outer extremity of the arm 6, pin 36 extending through the forward end of section 20 of arm 6. The axis of pins 34 and 36 provides d fixed axis of rotation about which the wing 38 can be angled into and out of the plane of L-shaped radial arm 6.
The pin 36 is preferably of a configuration having a perpendicular portion 40 beyond the forward end of section 20 of arm 6 to provide a variable pivotal axis. The wing 38 can thereby be angled relative to the longitudinal axis of the machine 2. This axis will vary with rotation of pin 36.
The wing 38 is rotatably attached to pins 34 and 36 by means of brackets 42 and 44 respectively.
~7~53 The bracket 42 includes a bell crank like device 46 illustrated in detail in Figures 3 and 4. The intermediate pivot 48 of the bell crank 46 rotates about pin 34. The two outer ends 66 and 68 of the bell crank 44 are rotatably connected at pins 62 and 64 to piston rods 58 and 60 of hydraulic cylinders 54 and 56. The cylinders 54 and 56 are in turn pivotally connected at pins 50 and 52 to the side of radial arm 6.
lhe bracket 44 as illustrated in Figure 2, is connected to the pin 36 so as to be rotatable with that pin about the axis through pins 34 and 36 and also to be rotatable about the perpendicular portion 40 of pin 36. The bracket is rigidly fixed to wing 38 near the inner end thereof.
Movement of the wing 38 about the two axes of rotation is accomplished through a linkage consisting of hydraulic cylinder 70, members 72 and 74, and bracket 76, The cylinder 70 is rotatably attached at one end at 78 to bracket 44, member 72 is rotatably attached at one end at 80 to bracket 42 and member 74 is rotatably attached at one end at 82 to bracket 76, which bracket is rigidly fixed to wing 38 near the outer end of the wing. Piston rod 84 associated with cylinder 70 is rotatably connected at 86 to the other ends of members 72 and 74 to complete the linkage.
In operation the angle of wing 38 relative to the longitudinal axis of the machine 2 is controlled by the hydraulic cylinder 70 and its associated piston rod 84. Extension of rod 84 will act via members 72 and 74 on the outer end of wing 38 to cause rotation of the wing about the axis through the part 40 of the pin 36, 7~5~
thus increasing the angle c7~ illustrated in Figure 2. Retraction of piston rod 84 will have the opposite effect, decreasing angle c~.
The angle ~ of the longitudinal axis of wing 38 relative to the plane of L-shaped radial arm 6 is controlled by the hydraulic cylinders 54 and 56 and their associated piston rods 58 and 60. The rods ~8 and 60 move in opposed relation such that when one of the two is being retracted the other is being extended and vice versa.
Thereby rotation is effected of brackets 42 and 44 about the common axis through pins 34 and 36. Thus through the linkage described above to bracket 76 at the outer end of the wing 38 and the direct connection of bracket 44 to the inner end of wing 38, the angle ~ as il1ustrated in Figure 5 can be varied.
It should be noted that in the specific manner of rotation illustrated in the drawings, there is a degree of interaction between the two modes of movernent of the wing 38. Thus assuming a constant amount of rotation of bracket 42, as the angle c~ is decreased the maximum effective value attainable by angle ~ is also necessarily decreased. Thus the angle will always be limited in its upper value by the angle c~ except in the case where the angle c~is 90 . In that case the angle ~ is limited only by the amount of rotation of bracket 42. It should also be noted that the converse is not true. That is, the angle ~ in no way 1imits the angle c~.
The preferred maximum value forc~ is 80 and for~ , 60.
All of the functions discussed above are preferably hydraulically controlled from the machine cab.
., It will be clear that the bell crank and double pivot attachment arrangement is readily applicable to the case where the vehicle is not fitted for the swing over capability. The wing support members need only be provided with the pivot points longitudinally spaced and at an appropriate level above the travelled surface.
While the invention has been described in detail in respect of the preferred embodiments, it will be understood that it is not intended to limit the invention to those embodiments. On the contrary it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the present invention.
360,641.
This invention relates to a wing plough for a road maintenance or the like vehicle.
Snow removal in northern areas is a perennnial problem in the solution of which improved methods and equipment are continuously being sought. One commonly used implement in snow removal from roads, etc., is the snow wing. The wing is often used in combination with a front-mounted blade or the like to enable the machine to sweep a wider area with the blades and to enable snow to be pushed back beyond ditches and the like where the machine itself cannot safely travel.
These machines generally have the wing and assembly mounted adjacent the driver's cab and on the right hand side of the machine. In some cases a pair of similar wings are mounted on opposite sides of the machine giving the added versatility of being able to use a wing on either side without regard to the direction of travel of the machine.
The present invention is di rected toward the improvement of the control of the wing angle in these and similar situations whereby to increase the versatility of such wings. Improvements are obtained in a general sense and in such specialized applications as ditching.
PRIOR ART
Road machines such as graders or the like with hinged adjustable side wings are well known. For example, such devices are dealt with in Canadian patents 318,372; 411,010; and 514,047; and in U.S. patents 1,964,617; 1,994,817; 2,281,512; and 2,547,680. None of these deals with a wing attachment means such as that of the present ~79S3 invention. Generally these patents deal with arrangements wherein the outer end of the wing is supported from a vertical post or mast at the side of the vehicle. Such assemblies tend to be awkward and cumbersome, to obstruct the view of the operator, and to partially block entry and exit from the vehicle; and, specifically, are of limited versatility.
SUMMARY OF THE INVENTION
_~.
The present invention utilizes a bell crank arrangement to obtain an improved range of movement of a wing plough and to thus increase its versatility.
Thus, the invention provides a wing plough apparatus for attachment to a road maintenance vehicle comprising:
at least one support member adapted to be secured to said vehicle and including forward and rearward longitudinally spaced points for pivotal connection of a wing blade;
a wing blade pivotally connected at said two points to said at least one member for rotation about an axis parallel to the longitudinal axis of said vehicle~ said first pivotal connection at said forward point comprising a first bracket secured to the inner end of said blade and pivotally connected at said forward point; and said second pivotal connection comprises a bell crank pivotally connected at its centre pivot to said rearward point and rigidly connected relative to its direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank connected to a pair of oppositely acting hydraulic cylinders which are ~4795~
in turn rotatably secured to said at least one support member, whereby the action of said hydraulic cylinders causes the rotation of said bell crank and hence of said blade about said parallel axis.
In a further embodiment the invention provides a swing-over snow wing apparatus for operation on either side of a grad~r or like vehicle comprising a radial arm rotatably mounted at its inner end on a horizontal axis extending longitudinally from the rear of the vehicle; a wing blade rotatably mounted on the outer end of said arm, and means for rotating said arm through 180 to swing said wing blade from one side of the vehicle to the other; and wherein said radial arm has a section forwardly extending from its outer end and wherein said blade is rotatably attached to said arm for vertical rotation relative to the plane of said arm by means of two pivotal connections, a first of said connections comprising a first bracket secured to the inner end of said blade and rotatably connected to a forward part of said forwardly extending section of said arm and the second of said connections comprising a bell crank bracket rotatably connected at its centre pivot to said arm and rigidly connected relative to the direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank bracket connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said radial arm, whereby the rotation of said bell crank bracket and hence of said blade can be controlled.
BRIEF DESCKIPTION OF THE DRAWINGS
In drawings which illustrate embodiments of the invention:
Figure 1 is a rear elevation view of one embodiment of the apparatus according to the invention;
Figure 2 is a top plan view of the embodiment of Figure l;
Figure 3 shows in elevation detail of the bell crank mechanism of one embodiment of the present invention;
Figure 4 is a plan view of the embodiment of Figure 4;
Figure 5 illustrates the effect of the bell crank embodiment of Figure 3 and 4;
DETAILED DESCRIPTION OF THE INVENTION
The wing plough of the present invention may be utilized in a swing over configuration useable on both sides of the supporting vehicle; or in a conventional wing designed for use on one side only of a vehicle. The swing over use is described in greater detail because of the additional complexity of construction.
With reference to the drawings, the rear end of a grader 2 is shown in discontinuous lines. The framework 4 is attached to the rear end of the frame of grader 2. The particular configuration of the framework 4 is not of great significance other than that it be such as to provide support for the radial arm 6 and9 in a preferred embodiment, for the guide member 8.
Thus the framework 4 in the embodiment shown includes the vertical hollow structural sections 10 connected to the grader frame.
The sections 10 carry the transverse members 12 and 13 from the former of which longitudinally extending arms 14 emanate. Members 12 and 13 also carry centrally located transverse plate 15. The outer ~7953 ends of arms 14 in turn support the vertical arms 16 and the transverse members 17, 1~ and 21. The transverse plate 15 and member 21 provide bearing support for the centrally located longitudinally extending horizontal shaft 18.
The basic swing-over capability of the wing plough is achieved by rotation of the radial arm 6 about the shaft 18. The radial arm 6 is a hollow structural section pivoted at its inner end on the shaft 18 and being of such a length that its outer ~nd at any appropriate point in its rotation extends beyond the vehicle wheels in order to avoid interference with the wheels in operation. At its outer end the radial arm 6 has a forwardly extending section 20 giving the radial arm 6 an overall L-shaped configuration. The section 20 is also a hollow structural section rigidly secured to the outer reach of the arm 6 and at substantially a right angle thereto.
The means for effecting rotation of the radial arm 6 about the shaft 18 includes a substantially semi-circular guide member 8 preferably secured to the framework 4 between the radial arm 6 and the rear of the vehicle 2. The radial arm 6 has associated with it power transmission means which cooperates with guide member 8 to effect rotation.
Thus in the embodiment illustrated in Figure 1 the radial arm 6, which, as indicated, is preferably a hollow structural section, has secured within it a power transmission means comprising a hydraulic motor 22 and a gear reducer 24. The gear reducer 24 turns the shaft 26 which extends through the side of radial arm 6 and drives exterior to the arm 6 a gear wheel 28. Gear wheel 28 is in opera-795;;~
tional engagement with guide means 8.
For this purpose guide member 8 in the embodiment illustrated in Figure 1 has secured to the semi-circular periphery thereof a roller chain 30. The driven gear wheel 28 is in the form of a sprocket which engages the roller chain 30 to thereby cause the radial arm 6 to rotate on the shaft 18.
While the power transmission means 22 and the gear reducer 24 are preferably respectively an hydraulic motor and a worm-type reducer, any other suitable power transmission means is acceptable.
In a further preferred embodiment the semi-circular member 8 is provided with gear teeth 32 around its inner edge, and the gear wheel 28 engages the teeth to cause the radial arm 6 to rotate on the shaft 18. Clearly this embodiment requires that power transmission means 22 be located such that shaft 26 and gear wheel 28 pass through the side of radial arm 6 at a point different from the case where the roller chain 30 is utilized on the outside of the guide 8.
While the guide means 8 has been referred to as semi-circular or substantially semi-circular, these terms should both be taken to include the preferred embodiment wherein guide means 8 encompasses somewhat more than 180 . This allows the radial arm 6 to reach a point in its rotation somewhat below the horizontal, as illustrated, for example, in Figure 1. This provides clear advantages in terms of positioning the wing for some operating positinns, enabling the wing, for example, when used with the bell crank arrangement to be described below, to operate horizontally on the ~7~53 surface over which the machine is moving.
While the arrangement provided allows for the positioning of radial arm 6 for operating purposes at any desired point on guide means 8, it also permits the arm 6 to be moved to a vertical or near vertical position for convenient transport. The wing 38 in this situation is folded by means of the mechanism to be described to a position such that the longitudinal axis of the wing is parallel to that of the machine. The mechanism can be locked in this position for travelling by means of a locking pin inserted through hole 33 in guide means 8 and a cooperating hole through radial arm 6.
In order to provide full flexibility of operations of the wing, provision is preferably made for two axes of rotation of the wing about the radial arm 6. Thus, in the preferred embodiment a pair of axially aligned longitudinally disposed (relative to the direction of travel of the machine) pivot pins 34 and 36 are suitably supported near the outer extremity of the arm 6, pin 36 extending through the forward end of section 20 of arm 6. The axis of pins 34 and 36 provides d fixed axis of rotation about which the wing 38 can be angled into and out of the plane of L-shaped radial arm 6.
The pin 36 is preferably of a configuration having a perpendicular portion 40 beyond the forward end of section 20 of arm 6 to provide a variable pivotal axis. The wing 38 can thereby be angled relative to the longitudinal axis of the machine 2. This axis will vary with rotation of pin 36.
The wing 38 is rotatably attached to pins 34 and 36 by means of brackets 42 and 44 respectively.
~7~53 The bracket 42 includes a bell crank like device 46 illustrated in detail in Figures 3 and 4. The intermediate pivot 48 of the bell crank 46 rotates about pin 34. The two outer ends 66 and 68 of the bell crank 44 are rotatably connected at pins 62 and 64 to piston rods 58 and 60 of hydraulic cylinders 54 and 56. The cylinders 54 and 56 are in turn pivotally connected at pins 50 and 52 to the side of radial arm 6.
lhe bracket 44 as illustrated in Figure 2, is connected to the pin 36 so as to be rotatable with that pin about the axis through pins 34 and 36 and also to be rotatable about the perpendicular portion 40 of pin 36. The bracket is rigidly fixed to wing 38 near the inner end thereof.
Movement of the wing 38 about the two axes of rotation is accomplished through a linkage consisting of hydraulic cylinder 70, members 72 and 74, and bracket 76, The cylinder 70 is rotatably attached at one end at 78 to bracket 44, member 72 is rotatably attached at one end at 80 to bracket 42 and member 74 is rotatably attached at one end at 82 to bracket 76, which bracket is rigidly fixed to wing 38 near the outer end of the wing. Piston rod 84 associated with cylinder 70 is rotatably connected at 86 to the other ends of members 72 and 74 to complete the linkage.
In operation the angle of wing 38 relative to the longitudinal axis of the machine 2 is controlled by the hydraulic cylinder 70 and its associated piston rod 84. Extension of rod 84 will act via members 72 and 74 on the outer end of wing 38 to cause rotation of the wing about the axis through the part 40 of the pin 36, 7~5~
thus increasing the angle c7~ illustrated in Figure 2. Retraction of piston rod 84 will have the opposite effect, decreasing angle c~.
The angle ~ of the longitudinal axis of wing 38 relative to the plane of L-shaped radial arm 6 is controlled by the hydraulic cylinders 54 and 56 and their associated piston rods 58 and 60. The rods ~8 and 60 move in opposed relation such that when one of the two is being retracted the other is being extended and vice versa.
Thereby rotation is effected of brackets 42 and 44 about the common axis through pins 34 and 36. Thus through the linkage described above to bracket 76 at the outer end of the wing 38 and the direct connection of bracket 44 to the inner end of wing 38, the angle ~ as il1ustrated in Figure 5 can be varied.
It should be noted that in the specific manner of rotation illustrated in the drawings, there is a degree of interaction between the two modes of movernent of the wing 38. Thus assuming a constant amount of rotation of bracket 42, as the angle c~ is decreased the maximum effective value attainable by angle ~ is also necessarily decreased. Thus the angle will always be limited in its upper value by the angle c~ except in the case where the angle c~is 90 . In that case the angle ~ is limited only by the amount of rotation of bracket 42. It should also be noted that the converse is not true. That is, the angle ~ in no way 1imits the angle c~.
The preferred maximum value forc~ is 80 and for~ , 60.
All of the functions discussed above are preferably hydraulically controlled from the machine cab.
., It will be clear that the bell crank and double pivot attachment arrangement is readily applicable to the case where the vehicle is not fitted for the swing over capability. The wing support members need only be provided with the pivot points longitudinally spaced and at an appropriate level above the travelled surface.
While the invention has been described in detail in respect of the preferred embodiments, it will be understood that it is not intended to limit the invention to those embodiments. On the contrary it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the present invention.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A wing plough apparatus for attachment to a road maintenance vehicle comprising:
at least one support member adapted to be secured to said vehicle and including forward and rearward longitudinally spaced points for pivotal connection of a wing blade;
a wing blade pivotally connected at said two points to said at least one member for rotation about an axis parallel to the longitudinal axis of said vehicle, said first pivotal connection at said forward point comprising a first bracket secured to the inner end of said blade and pivotally connected at said forward point; and said second pivotal connection comprising a bell crank pivotally connected at its centre pivot to said rearward point and rigidly connected relative to its direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said at least one support member, whereby the action of said hydraulic cylinders causes the rotation of said bell crank and hence of said blade about said parallel axis.
at least one support member adapted to be secured to said vehicle and including forward and rearward longitudinally spaced points for pivotal connection of a wing blade;
a wing blade pivotally connected at said two points to said at least one member for rotation about an axis parallel to the longitudinal axis of said vehicle, said first pivotal connection at said forward point comprising a first bracket secured to the inner end of said blade and pivotally connected at said forward point; and said second pivotal connection comprising a bell crank pivotally connected at its centre pivot to said rearward point and rigidly connected relative to its direction of rotation to the outer end of said blade by means of a hinged linkage, the outer pivots of said bell crank connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said at least one support member, whereby the action of said hydraulic cylinders causes the rotation of said bell crank and hence of said blade about said parallel axis.
2. The apparatus of claim 1 wherein said blade is rotatably attached to said arm for varying the angle of the longitudinal axis of said blade relative to the longitudinal axis of the machine by means of a pivotal connection comprising a second bracket secured to the inner end of said blade and rotatably connected to said at least one support member and wherein said rotation is controlled by an hydraulic cylinder pivotally connected to said second bracket and operatively connected to said hinged linkage, whereby said linkage may be hingedly opened or closed to vary the said angle.
3. The apparatus of claim 2 wherein said first bracket and said second bracket comprise a single bracket having two axes of rotation.
4. A swing-over snow wing apparatus for operation on either side of a grader or like vehicle comprising a radial arm rotatably mounted at its inner end on a horizontal axis extending longitudinally from the rear of the vehicle; a wing blade rotatably mounted on the outer end of said arm, and means for rotating said arm through 180°
to swing said wing blade from one side of the vehicle to the other;
and wherein said radial arm has a section forwardly extending from its outer end and wherein said blade is rotatably attached to said arm for rotation into and out of the plane of said arm by means of two pivotal connections, a first of said connections comprising a first bracket secured to the inner end of said blade and rotatably connected to a forward part of said forwardly extending section of said arm and the second of said connections comprising a bell crank bracket rotatably connected at its centre pivot to said arm and rigidly connected relative to the direction of rotation to the outer end of said blade, the outer pivots of said bell crank bracket connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said radial arm, whereby the rotation of said bell crank bracket and hence of said blade can be controlled.
to swing said wing blade from one side of the vehicle to the other;
and wherein said radial arm has a section forwardly extending from its outer end and wherein said blade is rotatably attached to said arm for rotation into and out of the plane of said arm by means of two pivotal connections, a first of said connections comprising a first bracket secured to the inner end of said blade and rotatably connected to a forward part of said forwardly extending section of said arm and the second of said connections comprising a bell crank bracket rotatably connected at its centre pivot to said arm and rigidly connected relative to the direction of rotation to the outer end of said blade, the outer pivots of said bell crank bracket connected to a pair of oppositely acting hydraulic cylinders which are in turn rotatably secured to said radial arm, whereby the rotation of said bell crank bracket and hence of said blade can be controlled.
5. The apparatus of claim 4 wherein said blade is rotatably attached to said arm for varying the angle of the longitudinal axis of said blade relative to the longitudinal axis of the machine by means of a pivotal connection comprising a second bracket secured to the inner end of said blade and rotatably connected to said forwardly extending section of said arm and wherein said rotation is controlled by an hydraulic cylinder pivotally connected to said second bracket and operatively connected to said hinged linkage, whereby said linkage may be hingedly opened or closed to vary the said angle.
6. The apparatus of claim 5 wherein said first bracket and said second bracket comprise a single bracket having two axes of rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000405649A CA1147953A (en) | 1982-06-21 | 1982-06-21 | Swing over snow wing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000405649A CA1147953A (en) | 1982-06-21 | 1982-06-21 | Swing over snow wing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1147953A true CA1147953A (en) | 1983-06-14 |
Family
ID=4123066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000405649A Expired CA1147953A (en) | 1982-06-21 | 1982-06-21 | Swing over snow wing |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1147953A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2623830A1 (en) * | 1987-12-01 | 1989-06-02 | Brouillet Liliane | Snow-plough device mounted on a vehicle |
| FR2626912A1 (en) * | 1988-02-05 | 1989-08-11 | Sico Metal Jura | Blade system, particularly a snow clearer system, adapted to be mounted on a carrying vehicle |
-
1982
- 1982-06-21 CA CA000405649A patent/CA1147953A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2623830A1 (en) * | 1987-12-01 | 1989-06-02 | Brouillet Liliane | Snow-plough device mounted on a vehicle |
| FR2626912A1 (en) * | 1988-02-05 | 1989-08-11 | Sico Metal Jura | Blade system, particularly a snow clearer system, adapted to be mounted on a carrying vehicle |
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