CA2509883A1 - Rock picker with floating reel and rigid batts - Google Patents
Rock picker with floating reel and rigid batts Download PDFInfo
- Publication number
- CA2509883A1 CA2509883A1 CA 2509883 CA2509883A CA2509883A1 CA 2509883 A1 CA2509883 A1 CA 2509883A1 CA 2509883 CA2509883 CA 2509883 CA 2509883 A CA2509883 A CA 2509883A CA 2509883 A1 CA2509883 A1 CA 2509883A1
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- Canada
- Prior art keywords
- reel
- apron
- pick
- frame
- supported
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- 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.)
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B43/00—Gatherers for removing stones, undesirable roots or the like from the soil, e.g. tractor-drawn rakes
Abstract
A rock picking apparatus for pulling behind a tractor features a wheel mounted frame, a reel assembly having batts or rakes for dislodging rocks from a ground surface, a hopper or container for storing the collected rocks and an apron, fork or grille for providing an inclined pathway from the ground surface to the hopper.
To avoid jamming, the present invention has a floating reel assembly with batts rigidly mounted thereon. The reel is pivotally supported for movement relative to the frame limited by an abutment member. If a batt comes into contact with an immovable obstruction while sweeping the ground surface, the entire reel assembly is raised, allowing the reel to continue rotating and the batt to pass over the obstruction. The apron is also floating in order to pass over obstructions.
The floating reel assembly moves with the floating apron, but is also free to move relative thereto.
To avoid jamming, the present invention has a floating reel assembly with batts rigidly mounted thereon. The reel is pivotally supported for movement relative to the frame limited by an abutment member. If a batt comes into contact with an immovable obstruction while sweeping the ground surface, the entire reel assembly is raised, allowing the reel to continue rotating and the batt to pass over the obstruction. The apron is also floating in order to pass over obstructions.
The floating reel assembly moves with the floating apron, but is also free to move relative thereto.
Description
ROCK PICKER WITH FLOATING REEL AND RIGID
B ATTS
The present invention relates to a rock picker having a floating reel assembly wherein the batts of the assembly are rigidly supported on the reel without springs or pivots.
BACKGROUND
Numerous types of rock picking devices have been developed for use in the agriculture industry. These devices are primarily used to remove rocks from located on or near the surface of farmland in preparation for tilling. The present invention concerns changes to the fork and reel assembly often used in rock picking devices towed behind tractors. Such an assembly features a reel having rakes, or batts, that when rotated remove rocks from the soil and pull them rearwards over a fork (also known as an apron or grille), into a container to be transported out of the field. The container is often pivotally mounted so that an actuator can be used to tip the container for dumping the collected rocks stored within.
United States Patent Numbers 4,296,818, 4,319,641 and 4,296,818 are examples of fork and reel assembly rock pickers. While all three patents describe rock picking devices that are different in many ways, all three feature rakes that are pivotally supported on the reel and biased to a preferred position by springs. These features are intended to provide flexibility to the fork and reel assembly in order to prevent the occurrence of jamming where large rocks block the rotational motion of the rakes.
However, these features add to the required components and complexity of the overall apparatus which increases both the initial and maintenance costs. As a result, there is a demand for a rock picker which can provide measures for preventing damaging jams without the added complexity of spring biased pivoting batts.
SUMMARY
According to one aspect of the present invention there is provided a rock picking apparatus comprising:
a wheel mounted support frame;
a hopper supported on the frame having an opening therein;
an apron extending between the opening of the hopper and ground level, said apron comprising a plurality of parallel longitudinal bars transversely spaced apart;
a pick up reel floatably supported on the frame for upward and downward motion relative to said frame due to protrusions from and recesses in the ground level;
the pick up reel being rotatable about a transverse axis forwardly spaced from the apron;
the pick up reel having a plurality of angularly spaced rakes supported thereon and extending in radial planes thereof;
each rake comprising a transverse pick up bar having a plurality of picking teeth spaced therealong;
the teeth being arranged to engage the ground level during rotational motion of the pick up reel, thereby dislodging rocks protruding upward from beneath or atop said ground level, moving said rocks rearwardly along said ground level and moving said rocks along the apron for entry to the hopper.
each rake being rigid such that a radial distance from the transverse axis of the reel to the teeth of the rake is fixed and upward motion of the teeth due to engagement of said teeth with one of the protrusions from the ground level during the rotational motion of the pick up reel is transferred through the rake to the pick up reel;
The present invention provides a floating reel in combination with longer rakes than the prior art. The floating reel arrangement allows the rakes to rise up and down relative to the frame with changes in ground level caused by obstructions and bumps or dips in the land. For example, if the picker engages an excessively large rock or other heavy obstacle that it cannot remove from the ground, the reel will tend to move up and over the object instead. Jamming is avoided without the need for spring biased pivotal members. In addition, longer rakes result in a larger sweeping diameter about the rotational axis of the reel. As a result, the picking teeth of the rakes contact the ground over a larger surface area per rotation of the reel, increasing the clearing effectiveness of the apparatus.
Preferably each rake further comprises a pair of longitudinal legs for supporting the transverse pick up bar, each leg being supported on the pickup reel at an opposite end thereof.
Preferably the hopper is supported for motion between a storing position in which in the opening of the hopper is adjacent to the apron and a dumping position in which the opening generally faces the ground level.
Preferably there is provided an actuator supported on the frame for moving the hopper between the storing position and the dumping position.
Preferably the actuator comprises at least one hydraulic cylinder.
Preferably there is provided at least one reel abutment member supported on the frame for limiting at least one of the upward motion and the downward motion of the pick up reel relative to the frame.
Preferably there is provided a reel pivot mechanism supported on the frame for supporting the pick up reel for the upward and downward motion thereof relative to the frame.
Preferably the rakes are angularly spaced about the pick up reel by a generally equal amount.
Preferably the apron is floatably supported on the frame for upward and downward motion relative to said frame due to engagement between said apron and the protrusions from and recesses in the ground level.
Preferably the pick up reel is supported on the apron such that said pick up reel undergoes the upward and downward motion due to engagement between said apron and the protrusions from and recesses in the ground level and the upward and downward motion relative to said frame due to the engagement of the teeth of the batts with the protrusions from or recesses in said ground level during the rotational motion of said pick up reel.
Preferably there is provided an apron pivot mechanism supported on the frame for supporting the apron for the upward and downward motion thereof relative to said frame.
Preferably the apron is supported for movement between a clearing apron position and a transporting apron position, said clearing apron position being characterized by engagement between said apron and the ground level and said transporting apron position being characterized by a vertical distance between said apron and said ground level.
Preferably there is provided an apron actuator for moving the apron between the clearing apron position and the transporting apron position.
Preferably the apron actuator comprises at least one hydraulic apron cylinder.
Preferably the pick up reel is supported for movement between a clearing reel position and a transporting reel position, said clearing reel position being characterized by engagement between the teeth of one of the batts and the ground level at a lowest point reached by said batt during the rotational motion of the pick up reel and said transporting reel position being characterized by a vertical distance between the teeth of said one of the batts and said ground level at said lowest point.
There may be provided a reel actuator for moving the reel between the clearing reel position and the transporting reel position. In this case the reel actuator preferably comprises at least one hydraulic reel cylinder.
Preferably there is provided a drive source for driving rotation of the pick up reel.
Preferably the drive source comprises a hydraulic motor.
Preferably the drive source further comprises:
a drive sprocket engaged to the hydraulic motor for rotation thereby;
a reel sprocket engaged to the pick up reel for rotation thereof; and a chain engaged around a portion of the drive sprocket and a portion of the reel sprocket for transferring rotational motion of the drive sprocket to the reel sprocket.
Preferably the drive source is supported on the pick up reel such that said drive source undergoes the upward and downward motion of said reel.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a side elevational view of the rock picking apparatus with the floating reel assembly in a lower position.
Figure 2 is a side elevational view of the rock picking apparatus with the floating reel assembly in an upper position.
Figure 3 is a top plan view of the rock picking apparatus.
Figure 4 is an isometric view of the frame, reel assembly and apron assembly of the rock picking apparatus.
Figure 5 is a side elevational view of the reel and apron assemblies of the rock picking apparatus as supported on the frame in a clearing position.
Figure 6 is a side elevational view of the reel and apron assemblies of the rock picking apparatus as supported on the frame in a transporting position.
Figure 7 is a side elevational view of the rock picking apparatus with the hopper in a dumping position.
Figure 8 is an isometric view of the reel and apron assemblies illustrating the reel drive system.
Figure 9 is an isometric view of the rock picking apparatus with a movable portion of the frame arranged in a side position.
DETAILED DESCRIPTION
The present invention illustrated in Figures 1 and 2 is a rock picking apparatus, generally indicated by 1, having a frame assembly 10, a storage assembly 20, an apron assembly 30 and a reel assembly 40. The rock picker 1 is towed behind a tractor (not shown) to remove rocks from farmland so that the fields can be tilled in preparation for the planting of crops without damaging the machinery used. The rock picker 1 is connected at a front end to the tractor by means of an engaging device 18.
Such devices are well known to those of skill in the art and therefore not described here in detail. The picker is supported by the frame 10 and rolls over a ground surface by means of wheels 12 that are supported on a rotating shaft 12 transverse to the frame 10. The reel assembly 40 dislodges rocks from the ground surface and pushes them up the apron assembly 30 toward the storage assembly 20 where the rocks are stored in a container or hopper 22. Once the hopper is full or clearing is completed, the rocks collected by the picker 1 are transported within the hopper 22 to a suitable dumping location.
As in a typical rock picker of this type, the reel assembly 40 has a plurality of rakes or batts 62 supported on a reel 52 mounted for rotation about a transverse axis 54. Each batt 62 has a pair of longitudinal legs 56 extending radially to the axis 54, the legs 56 of each batt 62 being supported by attachment plates 51 near opposite ends of the reel 52. At a distal end opposite the reel 52, the two legs 56 are connected by a transverse pick up bar 58. A plurality of picking teeth 60 for engaging rocks on or near the ground surface being cleared are spaced along the bar 58. As the reel 52 rotates, the picking teeth 60 move in a circular path about the transverse axis 54. In a lower portion of this path, the picking teeth will come into contact with the ground surface and move therealong, catching upwardly protruding rocks at or near the surface and dislodging them from the soil.
Unlike the devices disclosed in the prior art, the present invention does not feature spring biased pivot mounts for the batts 62. The legs 56, pick up bar 58 and teeth 60 of the batts 62 of the present invention are all rigid members which are fixedly attached to the reel 52. In order to prevent jamming of the batts 62 caused by engagement with an immovable object protruding from the ground, the reel assembly 40 is floatably mounted for motion between a raised position shown in Figure 1 and a lowered position shown in Figure 2. The position of the reel assembly 40 relative to the frame 10 is controlled by a combination of gravity and changes in the ground surface level. The weight of the reel assembly 40 tends to keep it in the lowered position, but an increase in the height of the ground surface localized beneath the reel assembly 40 will push upward on a rigid batt 62 in contact with the ground, causing the reel assembly 40 to rise. While the wheels 12 accommodate for gradual changes in surface height such as slopes and contours by orienting the frame 10 accordingly, the floating reel assembly 40 accommodates for sudden changes in height before the wheels 12 reach the disruption in ground level.
The floatation of the reel assembly 40 is provided by reel support arms 50 at opposite ends of the reel 52 which are mounted for movement about a pivot 48 on support member 46. Each support member 46 is rigidly attached to an abutment member 44, which serves to limit the pivotal motion of the respective reel support arm 50. A carrying member 42 supports each abutment member 44 and connected components of the reel assembly above the frame 10. The weight of the floating reel assembly 40 creates a moment about the pivots 48 which causes the reel support arms 50 to rotate clockwise (as viewed in Figures 1 and 2) toward the lowered position shown in Figure 1, where each arm 50 comes into contact with a cushioning stop 45 mounted on the respective abutment member 44. This prevents further rotation about the axis 54 in that direction. An upward force induced in a rigid batt 62 by a local increase in surface height that has yet to reach the wheels 12 is transferred to the reel 52 causing the support arms 50 to rotate counter clockwise (as viewed in Figures 1 and 2) about the pivots 48. The reel support arms 50 are prevented from rotating beyond the upper position shown in Figure 2 by contact with the abutment members 44 rearward of the pivots 48.
The apron assembly 30 supported on the frame 10 by the carrying members 42 provides a path between the ground surface and the storage assembly over which the rocks dislodged from the ground pass on their way to the hopper 22. As shown in Figures 1 and 2, the apron 30 extends downward and forward from the hopper 22. As shown in Figure 4, the apron 30 features a plurality of transversely spaced curved longitudinal bars 32 located between linear longitudinal end bars 31 on either side. The bars 31 and 32 have pointed tips 36 on the end for providing a smooth incline between the ground and the bars so that rocks engaged by the apron will move up along the curved bars 32. The bars 31 and 32 are all connected by means of a longitudinal strip 33 extending across the apron 30 near the tips 36 on the bottom surfaces of the bars 31 and 32. The curved bars 32 are further connected on their bottom surfaces by a plate 35 extending between the carrying members 42. The apron 30 is attached to each carrying member 42 by means of an apron support arm 34 and an end plate 37.
The floating reel assembly 40 is carried forward of the apron 30 such that rotation of the reel 52 not only causes the picking teeth 60 of the batts 62 to move along the ground surface and dislodge protruding rocks, but further causes the teeth 60 to push the rocks rearward and upward along the apron 30. The picking teeth 60 transversely spaced along the pick up bars 58 of the batts 62 and the longitudinal bars 31 and 32 transversely spaced across the apron 30 are arranged such that an opening between adjacent apron bars 31 and 32 allows a respective tooth 60 on each batt 62 to pass therethrough during rotation of the reel 52.
The reel assembly 40 and apron assembly 30 are movable between a clearing position and a transporting position as shown in Figure 5 and 6 respectively.
As seen in Figure 4, each carrying member 42 is supported for pivotal motion about pivot 80 of the frame 10 by arms 41 and 43. Movement between the two positions is controlled by means of a cylinder 86, which is connected to a pivot support 84 mounted on the left side frame member 15. The actuating portion of the cylinder 86 is connected to a moving pivot point 90 on a lever 92, which is pivotally supported on the carrying member 42 by another pivot 94. The weight of the reel assembly 40 and the apron assembly 30 creates a counter clockwise (as view in Figures 4-9) moment about the pivot 80, causing engagement between an L-shaped member 96, mounted on the carrying member 42 and the abutment member 44, and the lever 92. Actuating the cylinder 86 causes clockwise (as view in Figures 4-9) rotation of the lever 92 about the pivot 94, which in turn causes clockwise rotation of the carrying members 42 about the pivot 80 by means of the engagement between the lever 92 and the L-shaped member 96. With the cylinder 86 not extended, the assemblies 30 and 40 take on the clearing position, shown in Figure 5, due to the angled orientation of the carrying member 42. In this position the apron 30 is angled downward towards the ground and the reel assembly 40 is driven for rotation of the batts 62 in order to clear rocks from the ground and move them up the apron 30 into the hopper 22. With the cylinder 86 extended, the assemblies 30 and 40 take on the transporting position, shown in Figure 6, due to the vertical orientation of the carrying member 42. In this position, the apron 30 is horizontally oriented above ground level and the batts 62 don't contact the ground during rotation of the reel 52, even with the reel assembly 40 in the lowered position about its pivot 48. This position is adopted when the apparatus is either not in use or being used to transport rocks in the hopper 22 after clearing a field.
Like the reel assembly 40, the apron assembly 30 is arranged to float with respect to the frame in order to allow for upward and downward motion in response to changes in ground level caused by surface contours or obstructions. With the cylinder 86 not extended (see Figure 5) during clearing of a field, an upward force exerted by a protrusion from the ground surface on the apron 30 creates a clockwise (as viewed in Figures 4-9) moment about the pivot 80, causing the carrying members 42 to rotate about the pivots 80, thereby lifting the apron 30 upwards over the protrusion.
This rotation causes the L-shaped member 96 to lift off of the lever 92. Once either the apron 30 returns to its original elevation or the wheels 12 reach the same protrusion and raise the frame accordingly, the apron loses contact with the ground, eliminating the upward force and the resulting moment. As explained above, the weight of the reel assembly 40 and apron 30 induce engagement between the L-shaped member 96 and the lever 92, returning the apron 30 to its lower original position. Since the reel assembly 40 is supported on the same carrying members 42 as the apron 30, the two components move together during rotation of the carrying members 42. So both assemblies move in response to contact between the apron and obstructions immovable thereby, but the reel assembly 40 is free for further movement independent of the apron 30 about its own pivot point 48.
The storage assembly 20 features a hopper 22 having a grated lower surface 21 as shown in Figures 3 and 9. Openings in the grate 21 allow loose material, such as soil, that is inadvertently collected with rocks to fall through the bottom of the hopper 22 back to the ground surface. The hopper 22 is supported on the frame 10 by upper support members 24 pivotally attached to rear frame members 26 by pivot 81 on opposite sides of the apparatus 1. On each side, extending members 23 and 25 are pivotally connected to the upper support member 24 and rear support member 26 respectively, and are connected to each other by means of another pivot 27. A
cylinder 28 supported on each of the side members 13 and 15 of the frame 10 in order to control the pivotal movement of the hopper 22. A fixed end of each cylinder 28 is supported on a pivot 29 provided on the frame 10 and an actuating end of the cylinder 28 is connected to the extending members 23 and 25 at the pivot 27. The cylinder 28 is actuated to pivot the upper support members 24 about the pivot 81 so that the attached hopper 22 moves relative to the frame 10 to a dumping position shown in Figure 7. In this position, the rocks collected by the picker 1 are dumped from the hopper 22. With the cylinder 28 not extended, the hopper 22 remains in a storing position, as shown in Figures 1-3 and 9, in which it is oriented to receive rocks passed up the apron 30 by the batts 62 of the reel assembly 40.
The drive system for the reel assembly 40 is located within a housing 100 mounted on the support arm 50 such that the drive system moves with the floating assembly. The housing 100 is mounted on the same side of the reel assembly 40 as the cylinder 86 such that its weight is well supported. In Figure 9, an exterior panel has been removed from the housing 100 in order to illustrate its contents. A
hydraulic motor 102 is supported on the housing 100 and attached to a sprocket (not shown) inside. A
second larger sprocket is attached to the reel 52 and a chain (not shown) is fitted around the two sprockets such the motor 102 can be driven to cause rotation of the reel 52 and attached batts 62. Drive systems of this type are well known to those of skill in the art.
The rock picking apparatus is pulled behind a tractor with the hopper 22 in the storing position and the reel assembly 52 driven for clockwise rotation about the axis 54 such that the rigidly attached batts 62 engage the ground surface, thereby dislodging rocks from the earth by means of the picking teeth 60. After lifting rocks from the surface, each batt 62 further pushes the rocks rearward to the apron 30 and along the apron 30 such that the rocks continue into the hopper 22. Once the rock clearing process is completed the picker is towed to a dump site where the cylinder 28 is actuated to pivot the hopper 22 into the dumping position and the rocks are unloaded from the picker 1.
Long batts 62 are used such that the distance between the reel 52 and teeth 60 is in the order of six feet. It is desirable to use a long batt 62 as doing so increases the distance over which the teeth 60 of the batt 62 are engaged with the ground surface in each rotation of the reel 52. The larger the circle defined by the motion of the teeth 60 about the axis 54, the longer the arcuate portion of that circle during which the batt 62 and ground are in contact. This increases the overall effectiveness of the picker, as the area of the ground surface cleared with each sweep of one of the batts 62 is larger.
The frame 10 of the rock picking apparatus 1 features a movable attachment portion 16 at the front of the apparatus 1 with an engaging device 18 for connection to a tractor in a towing arrangement. A linkage arrangement 17 allows the attachment portion 16 to move between a linear position and an offset position. In the linear position shown in Figure 3, the engaging device 18 is positioned directly between side members 13 and 15 of the frame 10 such that the apparatus 1 is towed in line with the tractor. In the offset position shown in Figure 9, the engaging device 18 is position off to one side of the frame 10 such that the apparatus 1 is towed in an offset position relative to the tractor.
The use of hydraulic cylinders 28 and 86 and hydraulic motor 102 allows the various aspects of the apparatus 1 to be controlled by existing hydraulic systems provided on typical tractors. Such systems and means for connecting devices to such systems are well known to those of skill in the art.
Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without department from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
B ATTS
The present invention relates to a rock picker having a floating reel assembly wherein the batts of the assembly are rigidly supported on the reel without springs or pivots.
BACKGROUND
Numerous types of rock picking devices have been developed for use in the agriculture industry. These devices are primarily used to remove rocks from located on or near the surface of farmland in preparation for tilling. The present invention concerns changes to the fork and reel assembly often used in rock picking devices towed behind tractors. Such an assembly features a reel having rakes, or batts, that when rotated remove rocks from the soil and pull them rearwards over a fork (also known as an apron or grille), into a container to be transported out of the field. The container is often pivotally mounted so that an actuator can be used to tip the container for dumping the collected rocks stored within.
United States Patent Numbers 4,296,818, 4,319,641 and 4,296,818 are examples of fork and reel assembly rock pickers. While all three patents describe rock picking devices that are different in many ways, all three feature rakes that are pivotally supported on the reel and biased to a preferred position by springs. These features are intended to provide flexibility to the fork and reel assembly in order to prevent the occurrence of jamming where large rocks block the rotational motion of the rakes.
However, these features add to the required components and complexity of the overall apparatus which increases both the initial and maintenance costs. As a result, there is a demand for a rock picker which can provide measures for preventing damaging jams without the added complexity of spring biased pivoting batts.
SUMMARY
According to one aspect of the present invention there is provided a rock picking apparatus comprising:
a wheel mounted support frame;
a hopper supported on the frame having an opening therein;
an apron extending between the opening of the hopper and ground level, said apron comprising a plurality of parallel longitudinal bars transversely spaced apart;
a pick up reel floatably supported on the frame for upward and downward motion relative to said frame due to protrusions from and recesses in the ground level;
the pick up reel being rotatable about a transverse axis forwardly spaced from the apron;
the pick up reel having a plurality of angularly spaced rakes supported thereon and extending in radial planes thereof;
each rake comprising a transverse pick up bar having a plurality of picking teeth spaced therealong;
the teeth being arranged to engage the ground level during rotational motion of the pick up reel, thereby dislodging rocks protruding upward from beneath or atop said ground level, moving said rocks rearwardly along said ground level and moving said rocks along the apron for entry to the hopper.
each rake being rigid such that a radial distance from the transverse axis of the reel to the teeth of the rake is fixed and upward motion of the teeth due to engagement of said teeth with one of the protrusions from the ground level during the rotational motion of the pick up reel is transferred through the rake to the pick up reel;
The present invention provides a floating reel in combination with longer rakes than the prior art. The floating reel arrangement allows the rakes to rise up and down relative to the frame with changes in ground level caused by obstructions and bumps or dips in the land. For example, if the picker engages an excessively large rock or other heavy obstacle that it cannot remove from the ground, the reel will tend to move up and over the object instead. Jamming is avoided without the need for spring biased pivotal members. In addition, longer rakes result in a larger sweeping diameter about the rotational axis of the reel. As a result, the picking teeth of the rakes contact the ground over a larger surface area per rotation of the reel, increasing the clearing effectiveness of the apparatus.
Preferably each rake further comprises a pair of longitudinal legs for supporting the transverse pick up bar, each leg being supported on the pickup reel at an opposite end thereof.
Preferably the hopper is supported for motion between a storing position in which in the opening of the hopper is adjacent to the apron and a dumping position in which the opening generally faces the ground level.
Preferably there is provided an actuator supported on the frame for moving the hopper between the storing position and the dumping position.
Preferably the actuator comprises at least one hydraulic cylinder.
Preferably there is provided at least one reel abutment member supported on the frame for limiting at least one of the upward motion and the downward motion of the pick up reel relative to the frame.
Preferably there is provided a reel pivot mechanism supported on the frame for supporting the pick up reel for the upward and downward motion thereof relative to the frame.
Preferably the rakes are angularly spaced about the pick up reel by a generally equal amount.
Preferably the apron is floatably supported on the frame for upward and downward motion relative to said frame due to engagement between said apron and the protrusions from and recesses in the ground level.
Preferably the pick up reel is supported on the apron such that said pick up reel undergoes the upward and downward motion due to engagement between said apron and the protrusions from and recesses in the ground level and the upward and downward motion relative to said frame due to the engagement of the teeth of the batts with the protrusions from or recesses in said ground level during the rotational motion of said pick up reel.
Preferably there is provided an apron pivot mechanism supported on the frame for supporting the apron for the upward and downward motion thereof relative to said frame.
Preferably the apron is supported for movement between a clearing apron position and a transporting apron position, said clearing apron position being characterized by engagement between said apron and the ground level and said transporting apron position being characterized by a vertical distance between said apron and said ground level.
Preferably there is provided an apron actuator for moving the apron between the clearing apron position and the transporting apron position.
Preferably the apron actuator comprises at least one hydraulic apron cylinder.
Preferably the pick up reel is supported for movement between a clearing reel position and a transporting reel position, said clearing reel position being characterized by engagement between the teeth of one of the batts and the ground level at a lowest point reached by said batt during the rotational motion of the pick up reel and said transporting reel position being characterized by a vertical distance between the teeth of said one of the batts and said ground level at said lowest point.
There may be provided a reel actuator for moving the reel between the clearing reel position and the transporting reel position. In this case the reel actuator preferably comprises at least one hydraulic reel cylinder.
Preferably there is provided a drive source for driving rotation of the pick up reel.
Preferably the drive source comprises a hydraulic motor.
Preferably the drive source further comprises:
a drive sprocket engaged to the hydraulic motor for rotation thereby;
a reel sprocket engaged to the pick up reel for rotation thereof; and a chain engaged around a portion of the drive sprocket and a portion of the reel sprocket for transferring rotational motion of the drive sprocket to the reel sprocket.
Preferably the drive source is supported on the pick up reel such that said drive source undergoes the upward and downward motion of said reel.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a side elevational view of the rock picking apparatus with the floating reel assembly in a lower position.
Figure 2 is a side elevational view of the rock picking apparatus with the floating reel assembly in an upper position.
Figure 3 is a top plan view of the rock picking apparatus.
Figure 4 is an isometric view of the frame, reel assembly and apron assembly of the rock picking apparatus.
Figure 5 is a side elevational view of the reel and apron assemblies of the rock picking apparatus as supported on the frame in a clearing position.
Figure 6 is a side elevational view of the reel and apron assemblies of the rock picking apparatus as supported on the frame in a transporting position.
Figure 7 is a side elevational view of the rock picking apparatus with the hopper in a dumping position.
Figure 8 is an isometric view of the reel and apron assemblies illustrating the reel drive system.
Figure 9 is an isometric view of the rock picking apparatus with a movable portion of the frame arranged in a side position.
DETAILED DESCRIPTION
The present invention illustrated in Figures 1 and 2 is a rock picking apparatus, generally indicated by 1, having a frame assembly 10, a storage assembly 20, an apron assembly 30 and a reel assembly 40. The rock picker 1 is towed behind a tractor (not shown) to remove rocks from farmland so that the fields can be tilled in preparation for the planting of crops without damaging the machinery used. The rock picker 1 is connected at a front end to the tractor by means of an engaging device 18.
Such devices are well known to those of skill in the art and therefore not described here in detail. The picker is supported by the frame 10 and rolls over a ground surface by means of wheels 12 that are supported on a rotating shaft 12 transverse to the frame 10. The reel assembly 40 dislodges rocks from the ground surface and pushes them up the apron assembly 30 toward the storage assembly 20 where the rocks are stored in a container or hopper 22. Once the hopper is full or clearing is completed, the rocks collected by the picker 1 are transported within the hopper 22 to a suitable dumping location.
As in a typical rock picker of this type, the reel assembly 40 has a plurality of rakes or batts 62 supported on a reel 52 mounted for rotation about a transverse axis 54. Each batt 62 has a pair of longitudinal legs 56 extending radially to the axis 54, the legs 56 of each batt 62 being supported by attachment plates 51 near opposite ends of the reel 52. At a distal end opposite the reel 52, the two legs 56 are connected by a transverse pick up bar 58. A plurality of picking teeth 60 for engaging rocks on or near the ground surface being cleared are spaced along the bar 58. As the reel 52 rotates, the picking teeth 60 move in a circular path about the transverse axis 54. In a lower portion of this path, the picking teeth will come into contact with the ground surface and move therealong, catching upwardly protruding rocks at or near the surface and dislodging them from the soil.
Unlike the devices disclosed in the prior art, the present invention does not feature spring biased pivot mounts for the batts 62. The legs 56, pick up bar 58 and teeth 60 of the batts 62 of the present invention are all rigid members which are fixedly attached to the reel 52. In order to prevent jamming of the batts 62 caused by engagement with an immovable object protruding from the ground, the reel assembly 40 is floatably mounted for motion between a raised position shown in Figure 1 and a lowered position shown in Figure 2. The position of the reel assembly 40 relative to the frame 10 is controlled by a combination of gravity and changes in the ground surface level. The weight of the reel assembly 40 tends to keep it in the lowered position, but an increase in the height of the ground surface localized beneath the reel assembly 40 will push upward on a rigid batt 62 in contact with the ground, causing the reel assembly 40 to rise. While the wheels 12 accommodate for gradual changes in surface height such as slopes and contours by orienting the frame 10 accordingly, the floating reel assembly 40 accommodates for sudden changes in height before the wheels 12 reach the disruption in ground level.
The floatation of the reel assembly 40 is provided by reel support arms 50 at opposite ends of the reel 52 which are mounted for movement about a pivot 48 on support member 46. Each support member 46 is rigidly attached to an abutment member 44, which serves to limit the pivotal motion of the respective reel support arm 50. A carrying member 42 supports each abutment member 44 and connected components of the reel assembly above the frame 10. The weight of the floating reel assembly 40 creates a moment about the pivots 48 which causes the reel support arms 50 to rotate clockwise (as viewed in Figures 1 and 2) toward the lowered position shown in Figure 1, where each arm 50 comes into contact with a cushioning stop 45 mounted on the respective abutment member 44. This prevents further rotation about the axis 54 in that direction. An upward force induced in a rigid batt 62 by a local increase in surface height that has yet to reach the wheels 12 is transferred to the reel 52 causing the support arms 50 to rotate counter clockwise (as viewed in Figures 1 and 2) about the pivots 48. The reel support arms 50 are prevented from rotating beyond the upper position shown in Figure 2 by contact with the abutment members 44 rearward of the pivots 48.
The apron assembly 30 supported on the frame 10 by the carrying members 42 provides a path between the ground surface and the storage assembly over which the rocks dislodged from the ground pass on their way to the hopper 22. As shown in Figures 1 and 2, the apron 30 extends downward and forward from the hopper 22. As shown in Figure 4, the apron 30 features a plurality of transversely spaced curved longitudinal bars 32 located between linear longitudinal end bars 31 on either side. The bars 31 and 32 have pointed tips 36 on the end for providing a smooth incline between the ground and the bars so that rocks engaged by the apron will move up along the curved bars 32. The bars 31 and 32 are all connected by means of a longitudinal strip 33 extending across the apron 30 near the tips 36 on the bottom surfaces of the bars 31 and 32. The curved bars 32 are further connected on their bottom surfaces by a plate 35 extending between the carrying members 42. The apron 30 is attached to each carrying member 42 by means of an apron support arm 34 and an end plate 37.
The floating reel assembly 40 is carried forward of the apron 30 such that rotation of the reel 52 not only causes the picking teeth 60 of the batts 62 to move along the ground surface and dislodge protruding rocks, but further causes the teeth 60 to push the rocks rearward and upward along the apron 30. The picking teeth 60 transversely spaced along the pick up bars 58 of the batts 62 and the longitudinal bars 31 and 32 transversely spaced across the apron 30 are arranged such that an opening between adjacent apron bars 31 and 32 allows a respective tooth 60 on each batt 62 to pass therethrough during rotation of the reel 52.
The reel assembly 40 and apron assembly 30 are movable between a clearing position and a transporting position as shown in Figure 5 and 6 respectively.
As seen in Figure 4, each carrying member 42 is supported for pivotal motion about pivot 80 of the frame 10 by arms 41 and 43. Movement between the two positions is controlled by means of a cylinder 86, which is connected to a pivot support 84 mounted on the left side frame member 15. The actuating portion of the cylinder 86 is connected to a moving pivot point 90 on a lever 92, which is pivotally supported on the carrying member 42 by another pivot 94. The weight of the reel assembly 40 and the apron assembly 30 creates a counter clockwise (as view in Figures 4-9) moment about the pivot 80, causing engagement between an L-shaped member 96, mounted on the carrying member 42 and the abutment member 44, and the lever 92. Actuating the cylinder 86 causes clockwise (as view in Figures 4-9) rotation of the lever 92 about the pivot 94, which in turn causes clockwise rotation of the carrying members 42 about the pivot 80 by means of the engagement between the lever 92 and the L-shaped member 96. With the cylinder 86 not extended, the assemblies 30 and 40 take on the clearing position, shown in Figure 5, due to the angled orientation of the carrying member 42. In this position the apron 30 is angled downward towards the ground and the reel assembly 40 is driven for rotation of the batts 62 in order to clear rocks from the ground and move them up the apron 30 into the hopper 22. With the cylinder 86 extended, the assemblies 30 and 40 take on the transporting position, shown in Figure 6, due to the vertical orientation of the carrying member 42. In this position, the apron 30 is horizontally oriented above ground level and the batts 62 don't contact the ground during rotation of the reel 52, even with the reel assembly 40 in the lowered position about its pivot 48. This position is adopted when the apparatus is either not in use or being used to transport rocks in the hopper 22 after clearing a field.
Like the reel assembly 40, the apron assembly 30 is arranged to float with respect to the frame in order to allow for upward and downward motion in response to changes in ground level caused by surface contours or obstructions. With the cylinder 86 not extended (see Figure 5) during clearing of a field, an upward force exerted by a protrusion from the ground surface on the apron 30 creates a clockwise (as viewed in Figures 4-9) moment about the pivot 80, causing the carrying members 42 to rotate about the pivots 80, thereby lifting the apron 30 upwards over the protrusion.
This rotation causes the L-shaped member 96 to lift off of the lever 92. Once either the apron 30 returns to its original elevation or the wheels 12 reach the same protrusion and raise the frame accordingly, the apron loses contact with the ground, eliminating the upward force and the resulting moment. As explained above, the weight of the reel assembly 40 and apron 30 induce engagement between the L-shaped member 96 and the lever 92, returning the apron 30 to its lower original position. Since the reel assembly 40 is supported on the same carrying members 42 as the apron 30, the two components move together during rotation of the carrying members 42. So both assemblies move in response to contact between the apron and obstructions immovable thereby, but the reel assembly 40 is free for further movement independent of the apron 30 about its own pivot point 48.
The storage assembly 20 features a hopper 22 having a grated lower surface 21 as shown in Figures 3 and 9. Openings in the grate 21 allow loose material, such as soil, that is inadvertently collected with rocks to fall through the bottom of the hopper 22 back to the ground surface. The hopper 22 is supported on the frame 10 by upper support members 24 pivotally attached to rear frame members 26 by pivot 81 on opposite sides of the apparatus 1. On each side, extending members 23 and 25 are pivotally connected to the upper support member 24 and rear support member 26 respectively, and are connected to each other by means of another pivot 27. A
cylinder 28 supported on each of the side members 13 and 15 of the frame 10 in order to control the pivotal movement of the hopper 22. A fixed end of each cylinder 28 is supported on a pivot 29 provided on the frame 10 and an actuating end of the cylinder 28 is connected to the extending members 23 and 25 at the pivot 27. The cylinder 28 is actuated to pivot the upper support members 24 about the pivot 81 so that the attached hopper 22 moves relative to the frame 10 to a dumping position shown in Figure 7. In this position, the rocks collected by the picker 1 are dumped from the hopper 22. With the cylinder 28 not extended, the hopper 22 remains in a storing position, as shown in Figures 1-3 and 9, in which it is oriented to receive rocks passed up the apron 30 by the batts 62 of the reel assembly 40.
The drive system for the reel assembly 40 is located within a housing 100 mounted on the support arm 50 such that the drive system moves with the floating assembly. The housing 100 is mounted on the same side of the reel assembly 40 as the cylinder 86 such that its weight is well supported. In Figure 9, an exterior panel has been removed from the housing 100 in order to illustrate its contents. A
hydraulic motor 102 is supported on the housing 100 and attached to a sprocket (not shown) inside. A
second larger sprocket is attached to the reel 52 and a chain (not shown) is fitted around the two sprockets such the motor 102 can be driven to cause rotation of the reel 52 and attached batts 62. Drive systems of this type are well known to those of skill in the art.
The rock picking apparatus is pulled behind a tractor with the hopper 22 in the storing position and the reel assembly 52 driven for clockwise rotation about the axis 54 such that the rigidly attached batts 62 engage the ground surface, thereby dislodging rocks from the earth by means of the picking teeth 60. After lifting rocks from the surface, each batt 62 further pushes the rocks rearward to the apron 30 and along the apron 30 such that the rocks continue into the hopper 22. Once the rock clearing process is completed the picker is towed to a dump site where the cylinder 28 is actuated to pivot the hopper 22 into the dumping position and the rocks are unloaded from the picker 1.
Long batts 62 are used such that the distance between the reel 52 and teeth 60 is in the order of six feet. It is desirable to use a long batt 62 as doing so increases the distance over which the teeth 60 of the batt 62 are engaged with the ground surface in each rotation of the reel 52. The larger the circle defined by the motion of the teeth 60 about the axis 54, the longer the arcuate portion of that circle during which the batt 62 and ground are in contact. This increases the overall effectiveness of the picker, as the area of the ground surface cleared with each sweep of one of the batts 62 is larger.
The frame 10 of the rock picking apparatus 1 features a movable attachment portion 16 at the front of the apparatus 1 with an engaging device 18 for connection to a tractor in a towing arrangement. A linkage arrangement 17 allows the attachment portion 16 to move between a linear position and an offset position. In the linear position shown in Figure 3, the engaging device 18 is positioned directly between side members 13 and 15 of the frame 10 such that the apparatus 1 is towed in line with the tractor. In the offset position shown in Figure 9, the engaging device 18 is position off to one side of the frame 10 such that the apparatus 1 is towed in an offset position relative to the tractor.
The use of hydraulic cylinders 28 and 86 and hydraulic motor 102 allows the various aspects of the apparatus 1 to be controlled by existing hydraulic systems provided on typical tractors. Such systems and means for connecting devices to such systems are well known to those of skill in the art.
Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without department from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims (21)
1. A rock picking apparatus comprising:
a wheel mounted support frame;
a hopper supported on the frame having an opening therein;
an apron extending between the opening of the hopper and ground level, said apron comprising a plurality of parallel longitudinal bars transversely spaced apart;
a pick up reel floatably supported on the frame for upward and downward motion relative to said frame due to protrusions from and recesses in the ground level;
the pick up reel being rotatable about a transverse axis forwardly spaced from the apron;
the pick up reel having a plurality of angularly spaced rakes supported thereon and extending in radial planes thereof;
each rake comprising a transverse pick up bar having a plurality of picking teeth spaced therealong;
the teeth being arranged to engage the ground level during rotational motion of the pick up reel, thereby dislodging rocks protruding upward from beneath or atop said ground level, moving said rocks rearwardly along said ground level and moving said rocks along the apron for entry to the hopper.
each rake being rigid such that a radial distance from the transverse axis of the reel to the teeth of the rake is fixed and upward motion of the teeth due to engagement of said teeth with one of the protrusions from the ground level during the rotational motion of the pick up reel is transferred through the rake to corresponding upward motion of the axis of the pick up reel;
the transversely spaced longitudinal bars of the apron being arranged such that an adjacent pair of said bars is spaced such that a respective tooth of each rake can pass therebetween;
a wheel mounted support frame;
a hopper supported on the frame having an opening therein;
an apron extending between the opening of the hopper and ground level, said apron comprising a plurality of parallel longitudinal bars transversely spaced apart;
a pick up reel floatably supported on the frame for upward and downward motion relative to said frame due to protrusions from and recesses in the ground level;
the pick up reel being rotatable about a transverse axis forwardly spaced from the apron;
the pick up reel having a plurality of angularly spaced rakes supported thereon and extending in radial planes thereof;
each rake comprising a transverse pick up bar having a plurality of picking teeth spaced therealong;
the teeth being arranged to engage the ground level during rotational motion of the pick up reel, thereby dislodging rocks protruding upward from beneath or atop said ground level, moving said rocks rearwardly along said ground level and moving said rocks along the apron for entry to the hopper.
each rake being rigid such that a radial distance from the transverse axis of the reel to the teeth of the rake is fixed and upward motion of the teeth due to engagement of said teeth with one of the protrusions from the ground level during the rotational motion of the pick up reel is transferred through the rake to corresponding upward motion of the axis of the pick up reel;
the transversely spaced longitudinal bars of the apron being arranged such that an adjacent pair of said bars is spaced such that a respective tooth of each rake can pass therebetween;
2. The apparatus according to claim 1 wherein each rake further comprises a pair of longitudinal legs for supporting the transverse pick up bar, each leg being supported on the pickup reel at an opposite end thereof.
3. The apparatus according to claims 1 to 2 wherein the hopper is supported for motion between a storing position in which in the opening of the hopper is adjacent to the apron and a dumping position in which the opening generally faces the ground level.
4. The apparatus according to claim 3 wherein there is provided an actuator supported on the frame for moving the hopper between the storing position and the dumping position.
5. The apparatus according to claim 4 wherein the actuator comprises at least one hydraulic cylinder.
6. The apparatus according to claims 1 to 5 wherein there is provided at least one reel abutment member supported on the frame for limiting at least one of the upward motion and the downward motion of the pick up reel relative to the frame.
7. The apparatus according to claims 1 to 6 wherein there is provided a reel pivot mechanism supported on the frame for supporting the pick up reel for the upward and downward motion thereof relative to the frame.
8. The apparatus according to claims 1 to 7 wherein the rakes are angularly spaced about the pick up reel by a generally equal amount.
9. The apparatus according to claims 1 to 8 wherein the apron is floatably supported on the frame for upward and downward motion relative to said frame due to engagement between said apron and the protrusions from and recesses in the ground level.
10. The apparatus according to claim 9 wherein the pick up reel is supported on the apron such that said pick up reel undergoes the upward and downward motion due to engagement between said apron and the protrusions from and recesses in the ground level and the upward and downward motion relative to said frame due to the engagement of the teeth of the batts with the protrusions from or recesses in said ground level during the rotational motion of said pick up reel.
11. The apparatus according to claims 9 to 10 wherein there is provided an apron pivot mechanism supported on the frame for supporting the apron for the upward and downward motion thereof relative to said frame.
12. The apparatus according to claims 1 to 11 wherein the apron is supported for movement between a clearing apron position and a transporting apron position, said clearing apron position being characterized by engagement between said apron and the ground level and said transporting apron position being characterized by a vertical distance between said apron and said ground level.
13. The apparatus according to claim 12 wherein there is provided an apron actuator for moving the apron between the clearing apron position and the transporting apron position.
14. The apparatus according to claim 13 wherein the apron actuator comprises at least one hydraulic apron cylinder.
15. The apparatus according to claims 1 to 12 wherein the pick up reel is supported for movement between a clearing reel position and a transporting reel position, said clearing reel position being characterized by engagement between the teeth of one of the batts and the ground level at a lowest point reached by said batt during the rotational motion of the pick up reel and said transporting reel position being characterized by a vertical distance between the teeth of said one of the batts and said ground level at said lowest point.
16. The apparatus according to claim 15 wherein there is provided a reel actuator for moving the reel between the clearing reel position and the transporting reel position.
17. The apparatus according to claim 16 wherein the reel actuator comprises at least one hydraulic reel cylinder.
18. The apparatus according to claims 1 to 17 wherein there is provided a drive source for driving rotation of the pick up reel.
19. The apparatus according to claim 18 wherein the drive source comprises a hydraulic motor.
20. The apparatus according to claim 19 wherein the drive source further comprises:
a drive sprocket engaged to the hydraulic motor for rotation thereby;
a reel sprocket engaged to the pick up reel for rotation thereof; and a chain engaged around a portion of the drive sprocket and a portion of the reel sprocket for transferring rotational motion of the drive sprocket to the reel sprocket.
a drive sprocket engaged to the hydraulic motor for rotation thereby;
a reel sprocket engaged to the pick up reel for rotation thereof; and a chain engaged around a portion of the drive sprocket and a portion of the reel sprocket for transferring rotational motion of the drive sprocket to the reel sprocket.
21. The apparatus according to claims 18 to 20 wherein the drive source is supported on the pick up reel such that said drive source undergoes the upward and downward motion of said reel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2509883 CA2509883A1 (en) | 2005-06-14 | 2005-06-14 | Rock picker with floating reel and rigid batts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2509883 CA2509883A1 (en) | 2005-06-14 | 2005-06-14 | Rock picker with floating reel and rigid batts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2509883A1 true CA2509883A1 (en) | 2006-12-14 |
Family
ID=37545751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2509883 Abandoned CA2509883A1 (en) | 2005-06-14 | 2005-06-14 | Rock picker with floating reel and rigid batts |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2509883A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150208569A1 (en) * | 2014-01-29 | 2015-07-30 | Lester F. Pritchard | Rock Picking System |
| CN105519271A (en) * | 2016-02-04 | 2016-04-27 | 张德兵 | Mulching film uncovering machine |
-
2005
- 2005-06-14 CA CA 2509883 patent/CA2509883A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150208569A1 (en) * | 2014-01-29 | 2015-07-30 | Lester F. Pritchard | Rock Picking System |
| CN105519271A (en) * | 2016-02-04 | 2016-04-27 | 张德兵 | Mulching film uncovering machine |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Dead |
Effective date: 20130218 |