This invention relates generally to landscaping and construction equipment and more particularly to an improved tiltable implement attachment such as a tiltable bucket attachment, a tiltable blade attachment or the like for a vehicle such as a skid steerer, tractor or the like.
A wide variety of implement attachments such as buckets or blades for vehicles such as skid steerers, tractors or the like for landscaping and construction are available and in use. One type of an implement attachment configuration that is in use includes a bucket that is tiltable along a vertical, lateral plane, wherein the sides of the bucket can be tilted up or down vertically. These types of bucket attachments are particularly useful in finish grading, leveling, digging trenches, creating waterways and other applications where a precise contour is critical.
Various tiltable bucket attachment configurations can be found in U.S. Pat. Nos. 6,360,459; 5,964,301; 5,732,781; 5,403,144; and 4,999,022. The designs disclosed in these patents suffer from certain shortcomings. One shortcoming is that some of the designs found in the prior art are fairly complex, requiring a great amount of effort and time in attaching and detaching the implements to and from the vehicles. Another shortcoming is that in prior art bucket configurations, the pivot point about which the bucket is tilted is vertically located behind the bucket. With such a design, the sides of the bucket are simply just tilted up and down and remain at substantially the same distance or radius from the center point of the vehicle as compared to the untilted positions. Thus, for an implement having a large width, for example, one that extends well beyond the width of the vehicle, the tilted side edge will remain outside the outer perimeter of the vehicle. For such configurations, when the tilted side is engaged with the ground, the vehicle may lack the leverage or traction needed to perform the desired operation since the moment arm extending from the center of the vehicle or other support point to the tilted side of the implement will be fairly large and will laterally extend beyond the traction tires or treads of the vehicle.
An improved tiltable implement configuration is needed in the art. The present invention addresses the described deficiencies of the prior art tilting implement configurations by providing a relatively simple, reliable, and improved design.
The invention provides an improved tiltable implement attachment such as a bucket or a blade for a vehicle such as a skid steerer, tractor or the like.
According to one aspect of the invention, the invention includes a tiltable implement attachment for a motor vehicle. The implement could be a number of operative tools such as a bucket, blade, or the like. The tiltable attachment has a hitch assembly including a first locking structure and a second locking structure, wherein the first locking structure is constructed for removably coupling the hitch assembly to the vehicle. The tiltable attachment also includes an implement assembly that has an interlock structure that mates with the second locking structure of the hitch assembly to removably couple the implement assembly to the hitch assembly, wherein the implement assembly is pivotally movable relative to the hitch assembly between an untilted or neutral configuration and a fully tilted configuration. The implement assembly includes an implement working surface that defines a top edge, wherein the implement assembly is pivotally movable relative to the hitch assembly about a pivot point located above the top edge of the working surface of the implement.
According to another aspect of the invention, the invention includes a tiltable implement attachment for a motor vehicle including a right ground engaging fraction mechanism (hereinafter simply referred to as a wheel) and a left ground engaging traction mechanism (i.e., wheel). The right wheel defines a right outer edge and the left wheel defines a left outer edge. It will be understood that terminology such as ground engaging mechanism includes wheels, tracks, treads, etc.
The tiltable attachment includes a hitch assembly constructed to couple an implement assembly to the vehicle. The implement assembly is pivotally movable relative to the hitch assembly between an untilted or neutral configuration and a fully tilted configuration. The implement assembly includes an implement with a right end, a left end, and an implement width defined therebetween. The implement may have a width longer than the distance between the right outer edge defined by the right wheel and the left outer edge defined by the left wheel. The tiltable attachment is configured to move the implement assembly in a manner such that the right end of the implement is configured to be positioned inside the right outer edge when the implement assembly is fully tilted to a right side and the left end of the implement is configured to be positioned inside the left outer edge when the implement assembly is fully tilted to a left side.
Referring now to the Drawings, wherein like numerals represent like parts throughout the several views:
Referring to
The preferred embodiment of the tiltable bucket attachment 100 shown and described in this application is constructed to include such a universal hitch structure for use with a toe-heel type attachment carrier found in most vehicles. It should be understood, however, that in other embodiments, the tiltable bucket attachment could include other kinds of attachment structures depending on the type of vehicle and attachment carrier utilized.
Once attached, the tiltable bucket attachment 100 can be operated and moved, generally by hydraulic power, by the vehicle.
The tiltable bucket attachment 100 generally includes a hitch assembly 102 (e.g., a universal type hitch assembly for use with a toe/heel type attachment carrier) and a bucket assembly 104. The hitch assembly 102 may also be referred to as the primary attachment assembly and the bucket assembly 104 may also be referred to as the secondary attachment assembly. In
The hitch assembly 102 of the tiltable bucket attachment 100 is shown in
At the front face 108 of the main plate 106, the hitch assembly 102 includes a support bar 124 that is coupled to the main plate 106. In a preferred embodiment, the support bar 124 is welded to the main plate 106. The support bar 124 is located at the center of the main plate 106 and extends upwardly from the main plate 106. The support bar 124 includes a hole 126 at a top end 128 of the support bar 124. About halfway up from the bottom end 130 of the support bar 124, there is provided a cylinder bracket 132 on the support bar 124. The cylinder bracket 132 is constructed to receive one end of a hydraulic cylinder 134 that is used for tilting the bucket attachment 100. About halfway between the hole 126 at the end of the support bar 124 and the cylinder bracket 132, there is provided a pin bracket 136 on the support bar 124. The pin bracket 136 is used to receive a pin (not shown) to lock the hitch assembly 102 to the bucket assembly 104 once the two assemblies are coupled together. The pin bracket 136 may also be referred to as a pair of clevis tabs.
At the front face 108 of the main plate 106, there is also provided a slide guide 140 located underneath the support bar 124. The slide guide 140 includes an interlock portion 142 and a track portion 144. The interlock portion 142 is generally parallel to the front face 108 of the main plate 106 and is connected to the front face 108 of the main plate 106 via the track portion 144, which extends generally perpendicularly to the front face 108 of the main plate 106. The interlock portion 142 and the track portion 144 are defined by two curved plates that are preferably welded together. As will be discussed in further detail below, the interlock portion 142 is used to slidably engage the slide guide 146 of the bucket assembly 104. The track portion 144 is used to slidably support the slide guide 146 of the bucket assembly 104 as the slide guide 146 of the bucket assembly 104 slides across the track portion 144 of the slide guide 140 of the hitch assembly 102. The bucket attachment 100 is tiltable in a vertical direction and generally parallel to a lateral plane that is defined generally along the front face 108 of the main plate 106.
The bucket assembly 104 of the tiltable bucket attachment 100 is illustrated in
The rear plate 154 extends between the top end 164, the bottom end 166 and the right end 168 and the left end 170 of the bucket 148. The rear plate 154 includes a front face 172 and a rear face 174. Mounted on the rear face 174, there is provided two tilt bars 176, 178 and the slide guide 146 located underneath the two tilt bars 176, 178. The two tilt bars 176, 178 are connected together at their respective top ends 180, 182 by a pair of brackets 184, 186. The brackets 184, 186 are fastened to the tilt bars 176, 178 via fasteners 185. There is provided a handle 196 on the bracket 184 for carrying the bucket assembly 104. The two tilt bars 176, 178 angle away from each other in the direction going from their respective top ends 180, 182 to their respective bottom ends 188, 190. The bottom ends 188, 190 of the tilt bars 176, 178 are connected to the rear face 174 of the rear plate 154 of the bucket 148, preferably by welding.
The brackets 184, 186 that are used to connect together the top ends 180, 182 of the tilt bars 176, 178 include holes 192. The holes 192 are configured to align with the hole 126 defined at the top end 128 of the support bar 124 when the hitch assembly 102 is engaged with the bucket assembly 104. When engaged, the support bar 124 is captured between the two brackets 184, 186 and between the tilt bars 176, 178. An L-shaped pivot rod 194 is inserted through the hole 126 at the top end 128 of the support bar 124 and through the holes 192 in the brackets 184, 186 once they are aligned to interlock the hitch assembly 102 to the bucket assembly 104. A portion of the pivot rod 194 is captured in between the clevis tabs 136 with a pin (not shown) to lock the two assemblies 102, 104.
As shown in
Mounted on the top plate 156 of the bucket 148, there is provided a cylinder bracket 202 that receives the other end of the hydraulic cylinder 134 (shown only diagrammatically in the FIGS.) extending from the cylinder bracket 132 of the support bar 124 of the hitch assembly 102. In a preferred embodiment of the tiltable bucket attachment 100, the hydraulic cylinder 134 has a travel distance Dc of 8 inches for a 5 feet bucket. In other embodiments, the hydraulic cylinder 134 can have a travel distance of up to 16 inches. As shown in
As shown in
As shown in the FIGS., the pivot point 204 of the bucket attachment is located above the top edge 165 defined by the working surface 149 of the bucket 148. In one embodiment, the pivot point 204 is located approximately 1 foot to 3 feet above the top edge 165 of the working surface 149 (defined within area A) of the bucket 148 when the bucket is in a neutral position. In a preferred embodiment, the pivot point 204 is located approximately 2 feet above the top edge 165 of the working surface 149 of the bucket 148 for a bucket that is 5 feet wide. The dimensions of the bucket assembly 104 and the hitch assembly 102 including the pivot point location should be such that when the bucket attachment 104 is fully tilted to the right or to the left, the tilted end (e.g., the right end 168 or the left end 170 of the bucket 148) should preferably end up inside the outer edges 206, 208 of the vehicle defined by its ground engaging traction mechanisms (i.e., wheels, tracks, treads) 210, 212. Preferably, when the bucket 148 is in the untilted configuration, the right or the left ends 168, 170 of the bucket extend out 2 inches to 6 inches outside of the outer edges 206, 208 of the vehicle. The hitch assembly and the bucket assembly are configured such that when the bucket is tilted from an untilted position to a tilted position, the right or the left end 168, 170 of the bucket can end up positioned within the inside of the outer edges 206, 208 of the vehicle even if the ends 168, 170 extend out 2 inches to 6 inches outside of the outer edges 206, 208 in an untilted position.
In
It should be noted that the location of the height of the pivot point 204 measured from the top edge 165 of the working surface would be partially dictated by the width WB of the bucket utilized. The distance between the pivot point 204 and the top edge 165, as well as the width WB of the bucket 148 and the width of the vehicle Wv should be such that the tilted end of the bucket 148 ends up inside the outer edges 206, 208 of the vehicle defined by the respective wheels 210, 212 when the bucket assembly 104 is tilted. With the pivot point being located above the top edge 165 of the working surface 149 of the bucket 148, even if the width WB of the bucket is longer than the distance between the wheels 210, 212, the right and the left ends 168, 170 of the bucket 148 may still be positioned inside the outer edges 206, 208 defined by the wheels when the bucket assembly is fully tilted. This occurs because the moment arm M defined from the center of the bucket attachment 100 to an end 168, 170 of the bucket 148 is substantially reduced as compared to the untilted configuration when the pivot point is located generally above the top edge 165 of the working surface 149 of the bucket 148. It should be noted that the tilted end of the bucket 148 does not necessarily have to end up inside the outer edges 206, 208 of the vehicle defined by the respective wheels 210, 212 when the bucket is fully tilted, as long as the moment arm M is substantially reduced to provide the desired leverage.
It will be appreciated that while a preferred embodiment, description and application of the invention has been disclosed, other modifications of the invention not specifically disclosed or referred to herein will be apparent to those skilled in the art in light of the foregoing description. This invention is intended to provide a specific example of a preferred embodiment structure which clearly discloses the apparatus and its operative principles. Accordingly, the invention is not limited to any particular embodiment or configuration or component parts thereof or to the used of any particular materials for their construction. All alternatives, modifications, and variations of the present invention which fall within the spirit and broad scope of the appended claims are covered.
This application is a continuation of application Ser. No. 11/526,157, filed Sep. 22, 2006, which claims the benefit of provisional application Ser. No. 60/719,746, filed Sep. 22, 2005, which applications are incorporated herein by reference in their entirety.
Number | Date | Country | |
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60719746 | Sep 2005 | US |
Number | Date | Country | |
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Parent | 11526157 | Sep 2006 | US |
Child | 12769227 | US |