CA2228103A1 - Box-type earth scraper - Google Patents
Box-type earth scraper Download PDFInfo
- Publication number
- CA2228103A1 CA2228103A1 CA 2228103 CA2228103A CA2228103A1 CA 2228103 A1 CA2228103 A1 CA 2228103A1 CA 2228103 CA2228103 CA 2228103 CA 2228103 A CA2228103 A CA 2228103A CA 2228103 A1 CA2228103 A1 CA 2228103A1
- Authority
- CA
- Canada
- Prior art keywords
- box
- blade
- assembly
- pivotally connected
- scraper
- 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.)
- Abandoned
Links
Classifications
-
- 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
- E02F3/64—Buckets cars, i.e. having scraper bowls
- E02F3/65—Component parts, e.g. drives, control devices
- E02F3/654—Scraper bowls and components mounted on them
- E02F3/658—Cutting edge
-
- 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
- E02F3/64—Buckets cars, i.e. having scraper bowls
- E02F3/6454—Towed (i.e. pulled or pushed) scrapers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
Abstract
The scraper comprises an open-bottomed box having a front wall open at its bottom end. A blade, carrying ripper teeth, extends across the bottom of the front opening. The box is suspended from a front hitch and a pivotally connected rear wheel assembly. The hitch is pivotally connected with the front of the box. Hydraulic cylinders are pivotally connected between the hitch and the box. A hydraulic cylinder is pivotally connected between the top end of the box rear wall and the wheel assembly. A second blade extends across the rear end of the box and protrudes beneath its bottom rim. By manipulation of the cylinders, the box can be forwardly tilted so that the blade/tooth assembly is downwardly slanted and the weight of the box acts to press it downwardly. When so tilted, the box can be advanced to break up hard or frozen material. The broken material is deposited back on the ground through the open bottom of the box. On a second pass, the box can be leveled to collect and remove the broken material using the second blade.
The box can then be raised to leave or spread the broken material.
The box can then be raised to leave or spread the broken material.
Description
2 The present invention relates to a box scraper which can be pulled by a 3 tractor and used for breaking up hard ground, for earth moving, for leveling 4 and the like.
7 The invention was originally developed in connection with breaking up 8 and removing moguls and built-up layers of frozen animal waste in northern 9 cattle feed lots.
It is common practice in cattle feed lot operations to feed the animals at 11 long trouc,~hs (referred to as feed bunks). During feeding, the cattle commonly 12 drop waste. Under cold weather conditions, the waste freezes and begins to 13 build up, often in the form of humps or moguls. These slippery humps are 14 hazardous for the cattle. As a result, it becomes necessary for the feed lot operator to periodically break up and remove frozen waste and associated 16 straw and earth, to bring the surface of the lot down to a desirable level 17 elevation.
18 The implement commonly used for this function has long been a 19 backhoe. However this is a machine which many feed lot operators do not own - thE~y have to pay for a contractor to truck a backhoe in and carry out the 21 work. This is expensive to do.
22 Front end loaders are common equipment at feed lots, but they are not 23 very useful for this purpose. The loader bucket tends to slide over the hard, 24 slippery, frozen material.
1 It was the original objective in developing the present invention to 2 provide sin implement, usable with a tractor and affordable for feed lot 3 operators, which could effectively penetrate, break up and remove the frozen 4 waste. -This was achieved. However, once developed and tested, the implement has been found to also be useful for other applications such as 6 earth moving and leveling.
9 The implement developed in accordance with the invention comprises, when in a~ level position:
11 ~ A substantially horizontal, thick steel blade carrying forwardly 12 projecting, spaced apart ripper teeth (collectively referred to as the 13 blade/tooth assembly);
14 ~ A heavy steel box formed by rear and side walls and a front wall extending down only partway, so that the box is open-bottomed and 16 has a transversely extending opening at its bottom front end;
17 ~ The blade extends across the bottom of the opening and is 18 connected with the lower front segments of the side walls;
19 ~ The box is pivotally connected at the front to a rigid beam assembly ?0 which functions as a hitch for connection with the hitch of a tractor;
~'.1 ~ The box is also connected at the rear with a pivoting wheel 2 assembly. The wheel assembly preferably comprises a frame a3 pivotally connected with the rear wall of the box. The frame carries ~4 one or more wheels. A hydraulic cylinder means is pivotally connected at its lower end to the wheel frame and at its upper end 1 to the box rear wall. The cylinder assembly can be extended or 2 contracted to raise or lower the box from the rear end;
3 ~ A pivotally connected hydraulic cylinder means is angled up from 4 the hitch to the front of the box;
~ The pivot connection of the hitch with the box and the pivot 6 connections of the front cylinder means with the box and hitch thus 7 form a "three point connection" so that the front cylinder means can 8 be used to tilt the box from the front end;
9 ~ Thus the rear and front cylinder assemblies can be independently used to tilt the box and raise or lower its rear end, to orient the 11 blade and teeth downwardly with part of the box weight pressing 12 down on the blade. In addition the cylinder assemblies can be 13 adjusted to substantially level the box for collecting broken material;
14 ~ The rear wheel assembly inherently also acts as a gauge wheel for the box. It controls the cutting depth or elevation of the bladeltooth 16 assembly;
17 ~ The rear wheel assembly and front hitch suspend the box between 18 them and prevent the downwardly slanted bladeltooth assembly 19 from diving downwardly as the implement is advanced; and ~'0 ~ An internal downwardly slanted second blade is connected with the 2.1 rear portion of the box, so as to protrude below the bottom rim of ~2 the box, transversely to the direction of advance.
~3 The implement (referred to as a box scraper or scraper-ripper) is usually ~4 operated in two passes. On the first pass, the rear cylinder means is ~5 expanded and the front cylinder means is contracted to thereby tilt the box 1 forward, slant the bladeltooth assembly downwardly and position it at the 2 desired cutting depth. The tractor is then advanced with the bladeltooth 3 assembly breaking up the ground through which it passes. The hitch and rear 4 wheel assembly function to keep the bladeltooth assembly at the desired elevation. The broken material flows in a strip over the blade and drops back 6 onto the undisturbed ground as the box passes over it. On the second pass, 7 the cylinder assemblies are adjusted so that the box is brought to a generally 8 level condition - usually it is laid flat on the ground. The bladeltooth assembly 9 is now out of the broken material but the second blade penetrates into it.
When they unit is now advanced on the second pass over the same path, the 11 broken material curls up the second blade and rear wall and drops forward to 12 be trapped in the box. After the second pass, the box can then be moved to a 13 dumping location. To unload the contents, the cylinder means are adjusted to 14 raise the box so that it can be driven away, leaving the broken material on the ground to~ be subsequently removed by a front end loader or the like.
16 Broadly stated, the invention is directed to a box scraper which, when 17 level, connprises: an open-bottomed box having side, front and rear walls, the 18 front wall extending down only part way to leave a lower front opening 19 extending across the box, the box having a bottom rim and comprising a rear ~0 end portiion and a front end portion, the box further forming an internal ~1 chamber; a substantially horizontal bladeltooth assembly mounted to the ~2 box and .extending across the lower front opening, said assembly comprising ~3 a blade connected with the side walls at their lower front segments, said blade ~?4 carrying a plurality of forwardly directed ripping teeth spaced apart along its ?5 length; a downwardly slanted second blade mounted to the box rear end 1 portion and extending transversely of the box chamber, said second blade 2 protruding beneath the box bottom rim; a hitch assembly comprising 3 elongatecl rigid beam means pivotally connected at its rear end with the box 4 front portion above the blade/tooth assembly, said hitch assembly having means ai: its front end for connection with a pulling vehicle; first cylinder 6 means having a first end connected to the box front end portion at a point 7 above thE; beam means and a second end pivotally connected with the beam 8 means, thereby forming part of a three point connection between the hitch 9 assembly and the box; and a wheel assembly having at least one rotatable wheel and a member for pivotally mounting the wheel to the box rear end 11 portion, said wheel assembly further comprising second cylinder means 12 having an upper end pivotally connected to the box rear end portion and a 13 lower end pivotally connected to the member; so that, in a first pass mode, the 14 first and second cylinder means may be adjusted to tilt the box forwardly, to lower and downwardly slant the bladeltooth assembly and to bring part of the 16 box weight to bear on the bladeltooth assembly, whereby if the scraper is 17 pulled forwardly the bladeltooth assembly will penetrate and break up the 18 ground to form a strip of broken material which passes over the blade and 19 through the open bottom of the box to be re-deposited on the unbroken 0 ground while the hitch assembly and wheel assembly suspend the box with its ~1 blade maintained at the desired depth; and so that, in a second pass mode, 22 the box rnay be leveled by adjusting the first and second cylinder means so 3 that the bladeltooth assembly is substantially out of the ground while the 24 second blade penetrates the broken material, whereby when the scraper is again pulled forwardly the second blade will cause the broken material to 1 collect in the box chamber so that it may be carried along with the box; and so 2 that, in an unloading mode, the box may be lifted by adjusting the first and 3 second cylinder means to leave the collected material on the ground as the 4 scraper is. pulled away.
7 Figure 1 is a side view of the scraper;
8 Figure 2 is a top view of the scraper;
9 Figure 3 is a rear view of the scraper, showing the rear wheel assembly;
11 Figure 4 is a front view of the scraper;
12 Figure 5 is a simplified side view showing the tractorlscraper unit in the 13 first pass mode, with the box steeply downwardly tilted so that the bladeltooth 14 assembly is breaking up material which is being laid back down on the undisturbed ground by passing through the open bottom of the box;
16 Figure 6 is a simplified side view showing the unit in the second pass 17 mode, with the box slightly upwardly tilted so that the bladeltooth assembly is 18 out of the ground and the second blade is penetrating the broken material and 19 causing it to curl up and be collected and carried by the box as it advances;
Fic,~ure 7 is a simplified side view showing the unit with the box in an 21 intermediate downwardly tilted position with both blades operative - this mode 22 can be used to both cut and pick up material at the same time. It is used in 23 soft ground and in a scraping leveling function; and 24 Figure 8 is a simplified side view showing the unit with the box raised to leave collected material on the ground as the scraper moves away.
2 Having reference to the drawings, a box-type scraper 1 is shown. It is 3 designed to be pulled by a tractor 2 or like vehicle.
4 The scraper 1 comprises a box 3 having a front hitch 4 and rear wheel assembly 5.
6 The box 3 is generally rectangular in configuration. It comprises a rear 7 wall 6 and a pair of parallel, forwardly projecting side walls 7. The box 3 has 8 an open top 8 and bottom 9. A partial front wall 10 connects the front portions 9 7a of they side walls 7 at their upper ends. Thus an opening 11 extends across the bottom front end of the box 3.
11 The bladeltooth assembly 12 extends across the bottom of the opening 12 11 and connects the side walls 7 at their lower front end segments 7b. The 13 assembly 12 comprises a blade 13 carrying a plurality of attached ripper teeth 14 14 (otherwise known as "grousers"). The ripper teeth 13 are spaced apart along the blade's length. When the box 3 is in a level or horizontal position, 16 the blade 13 and teeth 14 are slightly downwardly slanted.
17 The scraper is intended for heavy duty use. In addition, the blade/tooth 18 assembly 12 is to be capable of being forced into and through very hard 19 material. And finally the box 3 is to supply the forcing weight for the blade/tooth assembly 12. It follows that the box, blade and teeth should be 21 formed using heavy steel plate and reinforcing beams, such as is commonly 22 used in the construction of highway earth-moving equipment.
1 A downwardly slanted second blade 15 extends across the bottom 2 lower end of the box chamber 16 at its rear and is connected to the lower rear 3 portions 7 c of the side walls 7 and the rear wall 6. The blade 15 protrudes 4 beneath the bottom rim 17 of the box 3.
A hitch 4 extends forwardly from the box 3. The hitch shown 6 comprises a pair of side beams 18 pivotally connected by pins 18a to the box 7 front end portion 3a. The side beams 18 are inwardly forwardly converging to 8 form a V-shaped frame 19. A reinforcing central beam 20 connects with the 9 side beams 18 at the apex and is pivotally connected by a pin 20a at its rear end with the box front end portion 3a. The rear pivot connections of the 11 beams 18, 20 are positioned above the blade 3.
12 Right and left hydraulic cylinders 21,22 are each pivotally connected at 13 their ends by pins 21 a, 22a and 21 b, 22b with the box front end portion 3a 14 and the adjacent side beam 18. Thus each side beam and its associated cylinder is connected with the box 3 to provide a three-point connection.
16 Expansion or contraction of the cylinders 21, 22 wil I cause the box 3 to pivot 17 or tilt about the front pins 18a, 20a.
18 The hitch 4 has a tongue 23 pivotally mounted to its front end 4a by a 19 horizontal pivot pin 24. The tongue 23 is pivotally connected to the tractor hitch 25 by a vertical pin 26. Thus the scraper 1 can follow and turn with the 21 tractor 2 pulling it.
1 A rear wheel assembly 5 extends from the box rear section 36. As 2 shown, support lugs 30 extend from the box rear wall 6. The end lugs 30 3 carry bearing assemblies 31. A horizontal shaft 32 is supported by the 4 bearing assemblies 31 for rotation. A rearwardly extending member or frame 33 is connected with the shaft 32. A pair of wheels 34 are rotatably mounted 6 to the frame 33.
7 A pair of spaced apart lugs 35 extend rearwardly from the top portion 8 6a of the box rear wall 6. A pair of spaced apart lugs 36 extend upwardly 9 from the shaft 32. A second hydraulic cylinder 37 is pivotally connected at its ends with the lugs 35, 36 by pins 38, 39. The cylinder 37 can extend or 11 contract to rotate the shaft 32 and attached frame 33 and wheels 34 about 12 their connection with the box 3. The cylinder 37 can be locked to lock the 13 wheels 34 at a desired elevation.
14 The rear wheel assembly 5 has been mounted centrally to the rear end wall 6 of the box 3. This enables the box 3 to be brought close to feed bunks.
16 However, the wheels 34 and supporting structure could be alternatively 17 mounted to the side walls 7 if desired.
18 The hydraulic hoses (not shown) of the tractor 2 will be connected to 19 actuate the front and rear cylinders 21, 22, 37 in a conventional manner.
Having reference to Figures 5 - 7, the operation of the scraper 1 on the 21 first pass will now be described. For penetrating and breaking up a strip of 22 ground, the box 3 is tilted relatively steeply, as shown in Figure 5, to bring the 23 bladeltooth assembly 12 down and tilt it downwardly. This is achieved by 24 expanding the rear cylinder 37 and contracting the front cylinders 21, 22.
The unit (tractor 2 and scraper 1 ) is then advanced. The ripper teeth 14 and blade 1 13 break up the ground. The broken material flows over the blade 13 and 2 drops back down through the box open bottom 9 onto the undisturbed ground.
3 The tractor 2, hitch 4 and locked cylinders 21, 22 form a front support; the 4 frame 33, wheels 34 and locked cylinder 37 form a rear support - these supports function to suspend the box 3 so that the advancing downwardly 6 slanted blade 13 can't draw down or dive into the ground.
7 On the second pass, illustrated in Figure 6, the front cylinders 21, 22 8 are expanded and the rear cylinder 37 contracted to generally level the box 9 and adjust the elevation of the rear blade 15 so that its bottom edge is brought to about the cutting elevation of the first pass. In many situations the box 3 11 can be lowered so that its bottom rim rests on the ground - the rear wheels 12 may be out of contact with the ground. As the unit is advanced, the broken 13 material curls up along the rear blade 15 and box rear wall 6 and cascades 14 forwardly to collect in the advancing box chamber 16.
The elevation and tilt of the box 3 can be adjusted to suit the situation.
16 In Figure 7, the box 3 is tilted less severely forward (in comparison to Figure 17 5) for use in softer ground. In this mode the rear blade 15 is close to the 18 cutting pane and the ground is both broken and collected in one pass.
19 To discharge collected broken ground, the rear cylinder 37 is expanded as shown in Figure 8 to raise the rear of the box 3 high, so that it can be 21 driven over the collected load of broken material 40.
22 Advantages 23 The invention is characterized by certain advantages, more particularly:
24 ~ The scraper can be modest in size and thus provides an affordable implement for a farm or feed lot operation;
1 ~ It can be used to break up ground, frozen or soft, and then operated 2 to collect the broken material, level the ground as it passes over it 3 and convey the collected material to a dumping location or spread it 4 thinly elsewhere;
~ It is unlikely to get plugged or stuck and can work in wet or dry 6 conditions; and 7 ~ Once set at a cutting depth, it is maintained at that depth until the 8 cylinders are adjusted.
9 The foregoing has described applicant's specific best mode of the invention. The scope of the invention is set forth in the claims now following.
7 The invention was originally developed in connection with breaking up 8 and removing moguls and built-up layers of frozen animal waste in northern 9 cattle feed lots.
It is common practice in cattle feed lot operations to feed the animals at 11 long trouc,~hs (referred to as feed bunks). During feeding, the cattle commonly 12 drop waste. Under cold weather conditions, the waste freezes and begins to 13 build up, often in the form of humps or moguls. These slippery humps are 14 hazardous for the cattle. As a result, it becomes necessary for the feed lot operator to periodically break up and remove frozen waste and associated 16 straw and earth, to bring the surface of the lot down to a desirable level 17 elevation.
18 The implement commonly used for this function has long been a 19 backhoe. However this is a machine which many feed lot operators do not own - thE~y have to pay for a contractor to truck a backhoe in and carry out the 21 work. This is expensive to do.
22 Front end loaders are common equipment at feed lots, but they are not 23 very useful for this purpose. The loader bucket tends to slide over the hard, 24 slippery, frozen material.
1 It was the original objective in developing the present invention to 2 provide sin implement, usable with a tractor and affordable for feed lot 3 operators, which could effectively penetrate, break up and remove the frozen 4 waste. -This was achieved. However, once developed and tested, the implement has been found to also be useful for other applications such as 6 earth moving and leveling.
9 The implement developed in accordance with the invention comprises, when in a~ level position:
11 ~ A substantially horizontal, thick steel blade carrying forwardly 12 projecting, spaced apart ripper teeth (collectively referred to as the 13 blade/tooth assembly);
14 ~ A heavy steel box formed by rear and side walls and a front wall extending down only partway, so that the box is open-bottomed and 16 has a transversely extending opening at its bottom front end;
17 ~ The blade extends across the bottom of the opening and is 18 connected with the lower front segments of the side walls;
19 ~ The box is pivotally connected at the front to a rigid beam assembly ?0 which functions as a hitch for connection with the hitch of a tractor;
~'.1 ~ The box is also connected at the rear with a pivoting wheel 2 assembly. The wheel assembly preferably comprises a frame a3 pivotally connected with the rear wall of the box. The frame carries ~4 one or more wheels. A hydraulic cylinder means is pivotally connected at its lower end to the wheel frame and at its upper end 1 to the box rear wall. The cylinder assembly can be extended or 2 contracted to raise or lower the box from the rear end;
3 ~ A pivotally connected hydraulic cylinder means is angled up from 4 the hitch to the front of the box;
~ The pivot connection of the hitch with the box and the pivot 6 connections of the front cylinder means with the box and hitch thus 7 form a "three point connection" so that the front cylinder means can 8 be used to tilt the box from the front end;
9 ~ Thus the rear and front cylinder assemblies can be independently used to tilt the box and raise or lower its rear end, to orient the 11 blade and teeth downwardly with part of the box weight pressing 12 down on the blade. In addition the cylinder assemblies can be 13 adjusted to substantially level the box for collecting broken material;
14 ~ The rear wheel assembly inherently also acts as a gauge wheel for the box. It controls the cutting depth or elevation of the bladeltooth 16 assembly;
17 ~ The rear wheel assembly and front hitch suspend the box between 18 them and prevent the downwardly slanted bladeltooth assembly 19 from diving downwardly as the implement is advanced; and ~'0 ~ An internal downwardly slanted second blade is connected with the 2.1 rear portion of the box, so as to protrude below the bottom rim of ~2 the box, transversely to the direction of advance.
~3 The implement (referred to as a box scraper or scraper-ripper) is usually ~4 operated in two passes. On the first pass, the rear cylinder means is ~5 expanded and the front cylinder means is contracted to thereby tilt the box 1 forward, slant the bladeltooth assembly downwardly and position it at the 2 desired cutting depth. The tractor is then advanced with the bladeltooth 3 assembly breaking up the ground through which it passes. The hitch and rear 4 wheel assembly function to keep the bladeltooth assembly at the desired elevation. The broken material flows in a strip over the blade and drops back 6 onto the undisturbed ground as the box passes over it. On the second pass, 7 the cylinder assemblies are adjusted so that the box is brought to a generally 8 level condition - usually it is laid flat on the ground. The bladeltooth assembly 9 is now out of the broken material but the second blade penetrates into it.
When they unit is now advanced on the second pass over the same path, the 11 broken material curls up the second blade and rear wall and drops forward to 12 be trapped in the box. After the second pass, the box can then be moved to a 13 dumping location. To unload the contents, the cylinder means are adjusted to 14 raise the box so that it can be driven away, leaving the broken material on the ground to~ be subsequently removed by a front end loader or the like.
16 Broadly stated, the invention is directed to a box scraper which, when 17 level, connprises: an open-bottomed box having side, front and rear walls, the 18 front wall extending down only part way to leave a lower front opening 19 extending across the box, the box having a bottom rim and comprising a rear ~0 end portiion and a front end portion, the box further forming an internal ~1 chamber; a substantially horizontal bladeltooth assembly mounted to the ~2 box and .extending across the lower front opening, said assembly comprising ~3 a blade connected with the side walls at their lower front segments, said blade ~?4 carrying a plurality of forwardly directed ripping teeth spaced apart along its ?5 length; a downwardly slanted second blade mounted to the box rear end 1 portion and extending transversely of the box chamber, said second blade 2 protruding beneath the box bottom rim; a hitch assembly comprising 3 elongatecl rigid beam means pivotally connected at its rear end with the box 4 front portion above the blade/tooth assembly, said hitch assembly having means ai: its front end for connection with a pulling vehicle; first cylinder 6 means having a first end connected to the box front end portion at a point 7 above thE; beam means and a second end pivotally connected with the beam 8 means, thereby forming part of a three point connection between the hitch 9 assembly and the box; and a wheel assembly having at least one rotatable wheel and a member for pivotally mounting the wheel to the box rear end 11 portion, said wheel assembly further comprising second cylinder means 12 having an upper end pivotally connected to the box rear end portion and a 13 lower end pivotally connected to the member; so that, in a first pass mode, the 14 first and second cylinder means may be adjusted to tilt the box forwardly, to lower and downwardly slant the bladeltooth assembly and to bring part of the 16 box weight to bear on the bladeltooth assembly, whereby if the scraper is 17 pulled forwardly the bladeltooth assembly will penetrate and break up the 18 ground to form a strip of broken material which passes over the blade and 19 through the open bottom of the box to be re-deposited on the unbroken 0 ground while the hitch assembly and wheel assembly suspend the box with its ~1 blade maintained at the desired depth; and so that, in a second pass mode, 22 the box rnay be leveled by adjusting the first and second cylinder means so 3 that the bladeltooth assembly is substantially out of the ground while the 24 second blade penetrates the broken material, whereby when the scraper is again pulled forwardly the second blade will cause the broken material to 1 collect in the box chamber so that it may be carried along with the box; and so 2 that, in an unloading mode, the box may be lifted by adjusting the first and 3 second cylinder means to leave the collected material on the ground as the 4 scraper is. pulled away.
7 Figure 1 is a side view of the scraper;
8 Figure 2 is a top view of the scraper;
9 Figure 3 is a rear view of the scraper, showing the rear wheel assembly;
11 Figure 4 is a front view of the scraper;
12 Figure 5 is a simplified side view showing the tractorlscraper unit in the 13 first pass mode, with the box steeply downwardly tilted so that the bladeltooth 14 assembly is breaking up material which is being laid back down on the undisturbed ground by passing through the open bottom of the box;
16 Figure 6 is a simplified side view showing the unit in the second pass 17 mode, with the box slightly upwardly tilted so that the bladeltooth assembly is 18 out of the ground and the second blade is penetrating the broken material and 19 causing it to curl up and be collected and carried by the box as it advances;
Fic,~ure 7 is a simplified side view showing the unit with the box in an 21 intermediate downwardly tilted position with both blades operative - this mode 22 can be used to both cut and pick up material at the same time. It is used in 23 soft ground and in a scraping leveling function; and 24 Figure 8 is a simplified side view showing the unit with the box raised to leave collected material on the ground as the scraper moves away.
2 Having reference to the drawings, a box-type scraper 1 is shown. It is 3 designed to be pulled by a tractor 2 or like vehicle.
4 The scraper 1 comprises a box 3 having a front hitch 4 and rear wheel assembly 5.
6 The box 3 is generally rectangular in configuration. It comprises a rear 7 wall 6 and a pair of parallel, forwardly projecting side walls 7. The box 3 has 8 an open top 8 and bottom 9. A partial front wall 10 connects the front portions 9 7a of they side walls 7 at their upper ends. Thus an opening 11 extends across the bottom front end of the box 3.
11 The bladeltooth assembly 12 extends across the bottom of the opening 12 11 and connects the side walls 7 at their lower front end segments 7b. The 13 assembly 12 comprises a blade 13 carrying a plurality of attached ripper teeth 14 14 (otherwise known as "grousers"). The ripper teeth 13 are spaced apart along the blade's length. When the box 3 is in a level or horizontal position, 16 the blade 13 and teeth 14 are slightly downwardly slanted.
17 The scraper is intended for heavy duty use. In addition, the blade/tooth 18 assembly 12 is to be capable of being forced into and through very hard 19 material. And finally the box 3 is to supply the forcing weight for the blade/tooth assembly 12. It follows that the box, blade and teeth should be 21 formed using heavy steel plate and reinforcing beams, such as is commonly 22 used in the construction of highway earth-moving equipment.
1 A downwardly slanted second blade 15 extends across the bottom 2 lower end of the box chamber 16 at its rear and is connected to the lower rear 3 portions 7 c of the side walls 7 and the rear wall 6. The blade 15 protrudes 4 beneath the bottom rim 17 of the box 3.
A hitch 4 extends forwardly from the box 3. The hitch shown 6 comprises a pair of side beams 18 pivotally connected by pins 18a to the box 7 front end portion 3a. The side beams 18 are inwardly forwardly converging to 8 form a V-shaped frame 19. A reinforcing central beam 20 connects with the 9 side beams 18 at the apex and is pivotally connected by a pin 20a at its rear end with the box front end portion 3a. The rear pivot connections of the 11 beams 18, 20 are positioned above the blade 3.
12 Right and left hydraulic cylinders 21,22 are each pivotally connected at 13 their ends by pins 21 a, 22a and 21 b, 22b with the box front end portion 3a 14 and the adjacent side beam 18. Thus each side beam and its associated cylinder is connected with the box 3 to provide a three-point connection.
16 Expansion or contraction of the cylinders 21, 22 wil I cause the box 3 to pivot 17 or tilt about the front pins 18a, 20a.
18 The hitch 4 has a tongue 23 pivotally mounted to its front end 4a by a 19 horizontal pivot pin 24. The tongue 23 is pivotally connected to the tractor hitch 25 by a vertical pin 26. Thus the scraper 1 can follow and turn with the 21 tractor 2 pulling it.
1 A rear wheel assembly 5 extends from the box rear section 36. As 2 shown, support lugs 30 extend from the box rear wall 6. The end lugs 30 3 carry bearing assemblies 31. A horizontal shaft 32 is supported by the 4 bearing assemblies 31 for rotation. A rearwardly extending member or frame 33 is connected with the shaft 32. A pair of wheels 34 are rotatably mounted 6 to the frame 33.
7 A pair of spaced apart lugs 35 extend rearwardly from the top portion 8 6a of the box rear wall 6. A pair of spaced apart lugs 36 extend upwardly 9 from the shaft 32. A second hydraulic cylinder 37 is pivotally connected at its ends with the lugs 35, 36 by pins 38, 39. The cylinder 37 can extend or 11 contract to rotate the shaft 32 and attached frame 33 and wheels 34 about 12 their connection with the box 3. The cylinder 37 can be locked to lock the 13 wheels 34 at a desired elevation.
14 The rear wheel assembly 5 has been mounted centrally to the rear end wall 6 of the box 3. This enables the box 3 to be brought close to feed bunks.
16 However, the wheels 34 and supporting structure could be alternatively 17 mounted to the side walls 7 if desired.
18 The hydraulic hoses (not shown) of the tractor 2 will be connected to 19 actuate the front and rear cylinders 21, 22, 37 in a conventional manner.
Having reference to Figures 5 - 7, the operation of the scraper 1 on the 21 first pass will now be described. For penetrating and breaking up a strip of 22 ground, the box 3 is tilted relatively steeply, as shown in Figure 5, to bring the 23 bladeltooth assembly 12 down and tilt it downwardly. This is achieved by 24 expanding the rear cylinder 37 and contracting the front cylinders 21, 22.
The unit (tractor 2 and scraper 1 ) is then advanced. The ripper teeth 14 and blade 1 13 break up the ground. The broken material flows over the blade 13 and 2 drops back down through the box open bottom 9 onto the undisturbed ground.
3 The tractor 2, hitch 4 and locked cylinders 21, 22 form a front support; the 4 frame 33, wheels 34 and locked cylinder 37 form a rear support - these supports function to suspend the box 3 so that the advancing downwardly 6 slanted blade 13 can't draw down or dive into the ground.
7 On the second pass, illustrated in Figure 6, the front cylinders 21, 22 8 are expanded and the rear cylinder 37 contracted to generally level the box 9 and adjust the elevation of the rear blade 15 so that its bottom edge is brought to about the cutting elevation of the first pass. In many situations the box 3 11 can be lowered so that its bottom rim rests on the ground - the rear wheels 12 may be out of contact with the ground. As the unit is advanced, the broken 13 material curls up along the rear blade 15 and box rear wall 6 and cascades 14 forwardly to collect in the advancing box chamber 16.
The elevation and tilt of the box 3 can be adjusted to suit the situation.
16 In Figure 7, the box 3 is tilted less severely forward (in comparison to Figure 17 5) for use in softer ground. In this mode the rear blade 15 is close to the 18 cutting pane and the ground is both broken and collected in one pass.
19 To discharge collected broken ground, the rear cylinder 37 is expanded as shown in Figure 8 to raise the rear of the box 3 high, so that it can be 21 driven over the collected load of broken material 40.
22 Advantages 23 The invention is characterized by certain advantages, more particularly:
24 ~ The scraper can be modest in size and thus provides an affordable implement for a farm or feed lot operation;
1 ~ It can be used to break up ground, frozen or soft, and then operated 2 to collect the broken material, level the ground as it passes over it 3 and convey the collected material to a dumping location or spread it 4 thinly elsewhere;
~ It is unlikely to get plugged or stuck and can work in wet or dry 6 conditions; and 7 ~ Once set at a cutting depth, it is maintained at that depth until the 8 cylinders are adjusted.
9 The foregoing has described applicant's specific best mode of the invention. The scope of the invention is set forth in the claims now following.
Claims (2)
1. A box scraper, which when level, comprises:
an open-bottomed box having side, front and rear walls, the front wall extending down only part way to leave a lower front opening extending across the box, said box having a bottom rim and comprising a rear end portion and a front end portion, said box forming an internal chamber;
a substantially horizontal blade/tooth assembly mounted to the box and extending across the lower front opening, said assembly comprising a blade connected with the side walls at their lower front segments, said blade carrying a plurality of forwardly directed ripping teeth spaced apart along its length;
a downwardly slanted second blade mounted to the box rear end portion and extending transversely of the box chamber, said second blade protruding beneath the box bottom rim;
a hitch assembly comprising elongated rigid beam means pivotally connected at its rear end with the box front portion above the blade/tooth assembly, said hitch assembly having means at its front end for connection with a pulling vehicle;
first cylinder means having a first end connected to the box front end portion at a point above the beam means and a second end pivotally connected with the beam means, thereby forming part of a three point connection between the hitch assembly and the box; and a wheel assembly having at least one rotatable wheel and a member for pivotally mounting the wheel to the box rear end portion, said wheel assembly further comprising second cylinder means having an upper end pivotally connected to the box rear end portion and a lower end pivotally connected to the member;
so that, in a first pass mode, the first and second cylinder means may be adjusted to tilt the box forwardly, to lower and downwardly slant the blade/tooth assembly and to bring part of the box weight to bear on the blade/tooth assembly, whereby if the scraper is pulled forwardly the blade/tooth assembly will penetrate and break up the ground to form a strip of broken material which passes over the blade and through the open bottom of the box to be re-deposited on the unbroken ground while the hitch assembly and wheel assembly suspend the box with its blade maintained at the desired depth; and so that, in a second pass mode, the box may be leveled by adjusting the first and second cylinder means so that the blade/tooth assembly is substantially out of the ground while the second blade penetrates the broken material, whereby when the scraper is again pulled forwardly the second blade will cause the broken material to collect in the box chamber so that it may be carried along with the box; and so that, in an unloading mode, the box may be lifted by adjusting the first and second cylinder means to leave the collected material on the ground as the scraper is pulled away.
an open-bottomed box having side, front and rear walls, the front wall extending down only part way to leave a lower front opening extending across the box, said box having a bottom rim and comprising a rear end portion and a front end portion, said box forming an internal chamber;
a substantially horizontal blade/tooth assembly mounted to the box and extending across the lower front opening, said assembly comprising a blade connected with the side walls at their lower front segments, said blade carrying a plurality of forwardly directed ripping teeth spaced apart along its length;
a downwardly slanted second blade mounted to the box rear end portion and extending transversely of the box chamber, said second blade protruding beneath the box bottom rim;
a hitch assembly comprising elongated rigid beam means pivotally connected at its rear end with the box front portion above the blade/tooth assembly, said hitch assembly having means at its front end for connection with a pulling vehicle;
first cylinder means having a first end connected to the box front end portion at a point above the beam means and a second end pivotally connected with the beam means, thereby forming part of a three point connection between the hitch assembly and the box; and a wheel assembly having at least one rotatable wheel and a member for pivotally mounting the wheel to the box rear end portion, said wheel assembly further comprising second cylinder means having an upper end pivotally connected to the box rear end portion and a lower end pivotally connected to the member;
so that, in a first pass mode, the first and second cylinder means may be adjusted to tilt the box forwardly, to lower and downwardly slant the blade/tooth assembly and to bring part of the box weight to bear on the blade/tooth assembly, whereby if the scraper is pulled forwardly the blade/tooth assembly will penetrate and break up the ground to form a strip of broken material which passes over the blade and through the open bottom of the box to be re-deposited on the unbroken ground while the hitch assembly and wheel assembly suspend the box with its blade maintained at the desired depth; and so that, in a second pass mode, the box may be leveled by adjusting the first and second cylinder means so that the blade/tooth assembly is substantially out of the ground while the second blade penetrates the broken material, whereby when the scraper is again pulled forwardly the second blade will cause the broken material to collect in the box chamber so that it may be carried along with the box; and so that, in an unloading mode, the box may be lifted by adjusting the first and second cylinder means to leave the collected material on the ground as the scraper is pulled away.
2. The scraper as set forth in claim 1 wherein:
the wheel assembly comprises a frame pivotally connected to the box rear wall, said frame carrying at least one rotatable wheel and the second cylinder means has its upper end pivotally connected to the box rear wall and its lower end pivotally connected to the frame.
the wheel assembly comprises a frame pivotally connected to the box rear wall, said frame carrying at least one rotatable wheel and the second cylinder means has its upper end pivotally connected to the box rear wall and its lower end pivotally connected to the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2228103 CA2228103A1 (en) | 1998-01-28 | 1998-01-28 | Box-type earth scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2228103 CA2228103A1 (en) | 1998-01-28 | 1998-01-28 | Box-type earth scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2228103A1 true CA2228103A1 (en) | 1999-07-28 |
Family
ID=29409171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2228103 Abandoned CA2228103A1 (en) | 1998-01-28 | 1998-01-28 | Box-type earth scraper |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2228103A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007095681A1 (en) * | 2006-02-21 | 2007-08-30 | Loriden Pty Ltd | Improved ripper assembly for ground scrapers |
-
1998
- 1998-01-28 CA CA 2228103 patent/CA2228103A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007095681A1 (en) * | 2006-02-21 | 2007-08-30 | Loriden Pty Ltd | Improved ripper assembly for ground scrapers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |