Abstract:
A cart for transporting and conveying agricultural materials is provided. The cart includes a frame; a set of wheels or tracks coupled with said frame; and a hitch assembly coupled with said frame to allow the cart to be towed on the wheels or tracks behind a tow vehicle. The cart further includes a hopper defined by a plurality of walls supported by the frame and having a hopper opening to receive agricultural material and a discharge opening for discharging agricultural material. The cart further includes a conveyor assembly coupled to the hopper, the conveyor assembly including an inlet in communication with the discharge opening to receive agricultural material therefrom and an outlet to discharge agricultural material. The conveyor assembly includes a lower conveyor section and an upper conveyor section. The lower conveyor section includes a lower conveyor housing and a lower conveyor extending within the lower conveyor housing and the upper conveyor section including an upper conveyor housing and an upper conveyor extending within the upper conveyor housing. The upper conveyor section is pivotable about a second tilt axis located between said lower and upper conveyor sections and positioned at an acute angle from vertical.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation-in-part of U.S. patent application Ser. No. 14/642,449, filed on Mar. 9, 2015, which is a continuation-in-part of U.S. patent application Ser. No. 14/231,166, filed on Mar. 31, 2014, which is a continuation of U.S. patent application Ser. No. 13/190,311, filed on Jul. 25, 2011, now U.S. Pat. No. 8,702,368; and claims the benefit of U.S. Provisional Patent Application Ser. No. 61/982,693, filed on Apr. 22, 2014, all of which are incorporated by reference herein in their entirety. 
     
    
     BACKGROUND 
     Field of the Invention 
       [0002]    The present invention is generally directed to carts for transporting agricultural materials and specifically directed to a grain cart with a folding auger having adjustable elevation. 
       Discussion of the Background Art 
       [0003]    Carts, such as grain carts, can be used to shorten harvesting time by improving the efficiency of harvesting equipment such as combines. Such carts can, for example, be used to transport grain from harvesters or combines in the field to grain trucks or bins at the side of the field. Carts are often preferred for use compared to grain bins or grain trucks because grain bins are typically immobile and grain trucks typically do not perform well in muddy or rough field conditions and have the potential to spark fires in dry fields. Carts usually comprise a bin (e.g., a container, hopper, or box) sitting atop a wheeled frame in combination with an auger means or mechanism for unloading grain from the bin. Carts can be designed to handle soft or rough fields with ease and can be designed to be drawn by a tractor alongside a combine that unloads its contents into the cart. Carts can be used to enable a combine to continue to harvest while unloading the grain into the cart. This grain unloading arrangement can increase productivity dramatically because combines need never stop to unload. In addition, it is not necessary for the combines themselves to travel to grain trucks or bins at the side of the field each time the combine is full. After a cart is loaded with grain or other material by one or more combines, the grain is unloaded from the cart into a bin for temporary storage or into a waiting grain truck for transport to another location, such as a grain elevator. Because carts offer a combination of economy, versatility, production savings, and maneuverability, they have been widely accepted by farmers and widely produced by equipment manufacturers. 
         [0004]    Carts capable of unloading grain directly into a grain truck or bin often use a conveyor to do so. Often the conveyor is in the form of an auger. Various auger configurations are known. Auger structures can, for example, be contained inside the hopper structure, located entirely outside of it, or in another desired location. Auger configurations can, for example, have a single auger or multiple augers. The auger structure can, for example, be located at the front, side, back, corner, or another desired location of the cart. 
         [0005]    In auger configurations having an auger that extends through the hopper such that there is an auger structure contained inside the hopper structure, grain removal from the hopper can be significantly impaired because internal auger structures can hinder downward grain flow. Therefore, it is often desirable that the auger structure be located entirely outside of the hopper. 
         [0006]    A double auger configuration can have, for example, a lower auger and an upper auger. The lower auger can, for example, receive material from the hopper and deposit it into the upper auger. The upper auger can then, for example, carry the material received from the lower auger and deposit it into a trailer, such as a grain trailer. Triple auger configurations are also known, which can include, for example, a lower, horizontally disposed drag auger, a vertically disposed lift auger, and an upper, horizontally disposed discharge auger. 
       SUMMARY 
       [0007]    According to a first aspect, a cart for transporting and conveying agricultural materials is provided. The cart includes a frame; a set of wheels or tracks coupled with the frame; and a hitch assembly coupled with the frame to allow the cart to be towed on the wheels or tracks behind a tow vehicle. The cart further includes a hopper defined by a plurality of walls supported by the frame and having a hopper opening to receive agricultural material and a discharge opening for discharging agricultural material. The cart further includes a conveyor assembly coupled to the hopper, the conveyor assembly including an inlet in communication with the discharge opening to receive agricultural material therefrom and an outlet to discharge agricultural material. The conveyor assembly includes a lower conveyor section and an upper conveyor section. The lower conveyor section includes a lower conveyor housing and a lower conveyor extending within the lower conveyor housing and the upper conveyor section includes an upper conveyor housing and an upper conveyor extending within the upper conveyor housing. The upper conveyor section is pivotable about a second tilt axis located between the lower and upper conveyor sections and positioned at an acute angle from vertical. 
         [0008]    In some embodiments, the second tilt axis is at an angle from vertical from about 5° to about 40°. In some embodiments, the cart further includes a tilting assembly coupled to an end of the lower conveyor housing and having a first tilt axis that is generally horizontal, and the tilting assembly is configured to pivot the conveyor assembly about the first tilt axis. In some embodiments, the first tilt axis is parallel to a longitudinal axis of the frame. In some embodiments, the second tilt axis is oriented to allow the upper conveyor section to pivot fore and aft. 
         [0009]    In some embodiments, the upper conveyor is connected to the lower conveyor via a universal joint. In some embodiments, the tilting assembly further includes at least one trunnion extending from the upper and lower conveyor housings and at least one bearing assembly on the other housing configured to receive the at least one trunnion. In some embodiments, the tilting assembly further includes a linear actuator having one end connected to the lower conveyor section and another end connected to the upper conveyor section. 
         [0010]    In some embodiments, the tilting assembly is configured to allow up to 20° of tilt in either direction relative to an in-line position where longitudinal axes of the upper and lower conveyor sections are in-line. In some embodiments, the conveyor assembly includes a first portion having a first set of helical flights of first diameter and first pitch and a second portion having a second set of helical flights of second diameter and second pitch, wherein the first diameter is larger than the second diameter, and wherein the first pitch is larger than the second pitch, and wherein the first portion is in one of the lower conveyor section and the upper conveyor section and the second portion is in one of the lower conveyor section and the upper conveyor section. 
         [0011]    In some embodiments, the tilting assembly is configured to allow the upper conveyor section to pivot between a first operating position in which a longitudinal axis of the upper conveyor section is generally collinear with a longitudinal axis of the lower conveyor section and a second operating position in which the longitudinal axis of the upper conveyor section is angled relative to the longitudinal axis of the lower conveyor section. In some embodiments, the longitudinal axis of the upper conveyor section extends upwardly at a first acute angle in a plane generally perpendicular to the longitudinal axis of the hopper in the first operating position and extends forwardly at a second acute angle relative to the first plane in the second operating position. In some embodiments, a height of the discharge outlet in the first and second operating positions is the same; in other embodiments, a height of the discharge outlet in the second operating position is higher than a height of the discharge outlet in the first operating position. 
         [0012]    In some embodiments, the second tilt axis is configured such that a discharge height when longitudinal axes of the lower and upper conveyor sections are inline is the lowest height position of the tilt movement, whereby as the upper conveyor section moves forward and rearward through the second tilt axis, the height increases. 
         [0013]    In some embodiments, the tilt assembly is configured to be controlled by a control system. In some embodiments, the control system is configured to automatically move the discharge outlet outward about a pivot axis approximately perpendicular to the second tilt axis so that an amount of side reach is maintained. In some embodiments, the control system is configured to automatically move the discharge outlet sideways about an axis in-line with a longitudinal axis of the upper conveyor section so that an amount of side reach is maintained. 
         [0014]    In some embodiments, the conveyor assembly further includes an intermediate section, the intermediate conveyor section including an intermediate conveyor housing and an intermediate conveyor extending within the intermediate conveyor housing, and the cart further comprising a folding assembly coupled to an end of the intermediate conveyor housing and having a fold axis, the folding assembly configured to pivot the upper conveyor section about the fold axis between a stored position and an operating position. 
         [0015]    According to a second aspect, a cart for transporting and conveying agricultural materials is provided. The cart includes a frame; a set of wheels or tracks coupled with the frame; and a hitch assembly coupled with the frame to allow the cart to be towed on the wheels or tracks behind a tow vehicle. The cart further includes a hopper defined by a plurality of walls supported by the frame and having a hopper opening to receive agricultural material and a discharge opening for discharging agricultural material, the plurality of walls including a front wall. The cart further includes a first conveyor assembly including a conveyor disposed in the hopper and operable to move agricultural material from the hopper towards the discharge opening. The cart further includes a second conveyor assembly disposed forwardly of the front wall, the second conveyor assembly including an inlet in communication with the discharge opening to receive agricultural material therefrom and an outlet to discharge agricultural material, wherein the second conveyor assembly includes a lower conveyor section, an upper conveyor section, and an intermediate conveyor section. The lower conveyor section including a lower conveyor housing and a lower conveyor extending within the lower conveyor housing, the intermediate conveyor section including an intermediate conveyor housing and an intermediate conveyor extending within the intermediate conveyor housing, and the upper conveyor section including an upper conveyor housing and an upper conveyor extending within the upper conveyor housing. The cart further includes a folding assembly coupled to an end of the intermediate conveyor housing and having a fold axis, the folding assembly configured to pivot the upper conveyor section about the fold axis between a stored position and an operating position. The cart further includes a tilting assembly coupled to an end of the intermediate conveyor housing and having a tilt axis, the tilting assembly configured to pivot the upper conveyor section about the tilt axis when the upper conveyor section is in the operating position. 
         [0016]    In some embodiments, the fold axis is oriented generally horizontally and parallel to a longitudinal axis of the hopper to allow the upper conveyor section, when the upper conveyor section is in the most rearward operating position, to fold across a front of the hopper. In some embodiments, the intermediate conveyor section includes a first end adjacent the lower conveyor section and a second end adjacent the upper conveyor section, and wherein the fold axis is positioned at the second end of the intermediate conveyor section and the second tilt axis is positioned at the first end of the intermediate conveyor section. In some embodiments, the intermediate conveyor has a first end connected to the lower conveyor and has a second end configured to mate with the upper conveyor when the upper conveyor section is in the operating position and to be detached from the upper conveyor when the upper conveyor section is not in the operating position. 
         [0017]    In some embodiments, the intermediate conveyor is connected to the lower conveyor via a universal joint. In some embodiments, the tilting assembly includes at least one trunnion extending from one of the upper and intermediate conveyor housings and at least one bearing assembly on the other housing configured to receive the at least one trunnion. In some embodiments, the tilting assembly includes a linear actuator having one end connected to the lower conveyor section and another end connected to the intermediate conveyor section. In some embodiments, the folding assembly includes a linear actuator having one end connected to the upper conveyor section and another end connected to one of the lower conveyor section, the intermediate conveyor section, and the frame. In some embodiments, the tilt and fold assemblies are configured to be controlled by a control system. In some embodiments, the control system is configured to only move the upper conveyor section to the stored position when the upper conveyor section is in a predefined tilt position. In some embodiments, the control system is configured to automatically move the upper conveyor section to a suitable tilt position before moving the upper conveyor section to the stored position. In some embodiments, the control system is configured to automatically move the discharge outlet outward about a pivot axis approximately perpendicular to the tilt axis so that an amount of side reach is maintained. In some embodiments, the control system is configured to automatically move the discharge outlet sideways about an axis in-line with a longitudinal axis of the upper conveyor section so that an amount of side reach is maintained. 
         [0018]    Other features and advantages of embodiments of the invention will become apparent to those of skill in the art upon reviewing the following detailed description of the preferred embodiments and the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]    The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments and, together with the detailed description, serve to explain the principles of the invention and to enable a person skilled in the art to make and use the invention. In the drawings, like reference numbers are used to indicate identical or functionally similar elements. 
           [0020]      FIG. 1  is a top view of an embodiment of a cart with an upper auger section having adjustable forward reach. 
           [0021]      FIG. 2  is a side view of an embodiment of a cart with an upper auger section having adjustable forward reach. 
           [0022]      FIG. 3  is a front view of an embodiment of a cart with an upper auger section having adjustable forward reach. 
           [0023]      FIG. 4A  is a front view of an embodiment of a cart with an upper auger section having adjustable forward reach. 
           [0024]      FIG. 4B  is a section view along line E-E in  FIG. 4A . 
           [0025]      FIGS. 5A-5C  are detail views of an embodiment of a tilting assembly for a grain cart with an upper auger section having adjustable forward reach. 
           [0026]      FIGS. 6A and 6B  are detail views of an embodiment of a fold assembly for a grain cart with an upper auger section having adjustable forward reach. 
           [0027]      FIG. 7  is a perspective view of an embodiment of a cart with an upper auger section having adjustable forward reach. 
           [0028]      FIG. 8  is a perspective view of a track system. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0029]    While the present invention may be embodied in many different forms, a number of illustrative embodiments are described herein with the understanding that the present disclosure is to be considered as providing examples and not intended to limit the invention to the preferred embodiments described and/or illustrated herein. 
         [0030]    Referring now to  FIGS. 1-7 , a grain cart  100  according to an embodiment of the present invention includes a rolling frame  112  for attachment behind a tow vehicle such as a tractor, a bin  114  mounted on the frame for storing a quantity of grain, and an auger assembly, such as second conveyor assembly  116 , for unloading grain from the bin. In the embodiment shown in  FIGS. 1 and 2 , the frame  112  is supported for rolling movement on a set of wheels  118  with tires. In some embodiments, the frame  112  may be supported for rolling movement on a track system, such as track system  800  (shown in  FIG. 8 ). The frame  112  also includes a hitch  122  that extends forwardly from the frame  112  for attachment to a tractor. In the embodiment shown in  FIGS. 1 and 2 , the bin  114  includes a front wall  124 , a rear wall  126 , and right and left side walls  128  and  130  defining a space for storing grain. The grain cart  100  may also include a gate or door near a bottom of the bin  114  that separates the grain storage space from a sump area  132 . The grain cart  100  may also include a first conveyor assembly  115  disposed in the sump area  132  for moving agricultural material from the bin to a discharge opening in the front bin wall  124 . First conveyor assembly  115  may include a conveyor, such as an auger or flighting, or other suitable conveyor type for a grain cart such as a belt conveyor. 
         [0031]    Second conveyor assembly  116  includes a lower conveyor section  134 , an upper conveyor section  136 , and an intermediate conveyor section  135 . The upper conveyor section  136  includes a tubular upper housing and an upper auger (not shown) with helical flights rotatably disposed within the upper housing. The upper conveyor section  136  also includes a discharge spout  140  at a top end of the upper housing. The discharge spout  140  may include a discharge opening  141  which allows agricultural material such as grain to exit from the spout. The lower conveyor section  134  includes a tubular lower housing and a lower auger (not shown) with helical flights rotatably disposed within the lower housing. The lower conveyor section  134  extends upwardly, forwardly, and laterally outwardly from the sump area  132  to connect with a bottom end of the upper conveyor section  136  proximate a front left corner of the bin  114  (e.g., proximate the intersection of the front and left walls of the bin). In an embodiment, intermediate conveyor section  135  is located between upper conveyor section  136  and lower conveyor section  134 . The intermediate conveyor section  135  includes a tubular intermediate housing and an intermediate auger (not shown) with helical flights rotatably disposed within the intermediate housing. In some embodiments, the lower conveyor section  134  connects with a bottom end of the intermediate conveyor section  135  and the upper conveyor section  134  connects with a top end of the intermediate conveyor section  135 . In some embodiments, the lower and intermediate sections are connected by a joint, such as, for example, a universal joint. 
         [0032]    In embodiments, second conveyor assembly  116  is in communication with sump  132 . In some embodiments, the lower conveyor section  134  of the second conveyor assembly is in communication with sump  132  via the first conveyor assembly  115 . 
         [0033]    The upper and lower conveyor sections are connected by a hinge assembly that defines a pivot axis about which the upper auger section  136  can be pivoted between an operating position and a transport position. In an embodiment, folding of the upper auger section  136  can be effectuated by a fold actuator  604  connected between the upper auger section and the lower auger section, the frame  112 , and/or the bin  114 . In the embodiment shown, the fold actuator  604  is a hydraulic cylinder connected between the upper and intermediate auger sections  136  and  135 . In the operating position, shown in  FIGS. 1 and 2 , the bottom end of the upper housing abuts a top end of the intermediate housing so that the upper auger section  136  extends upwardly from the intermediate auger section  135  and grain can be conveyed from the sump  132  to the discharge spout  140  via rotation of the augers. In the transport position, the upper auger section  136  is folded relative to the lower auger section  134  so that the upper auger section extends along a wall of the bin  114 , e.g., such that the upper auger portion extends rearwardly from the lower auger portion along a side of the bin for easier transport and storage. In an embodiment, the fold axis is oriented generally horizontally and parallel to a longitudinal axis of the bin to allow the upper conveyor section to fold across a front of the bin. 
         [0034]    The figures show the different positions that the second conveyor assembly  116  may assume. For example,  FIGS. 1 and 2  each show the second conveyor assembly in one of three different operating positions, described herein. These three different operating positions are exemplary of the range of motion, and other operating positions are possible.  FIGS. 3 and 7  each show the second conveyor assembly  116  in both an operating position and a storage position. One of ordinary skill in the art will appreciate that the second conveyor assembly  116  is in one position at any one time, and that the figures are for illustrative purposes. 
         [0035]    As described in detail below, second conveyor assembly  116  includes a lower conveyor section  134 , an upper conveyor section  136  with a discharge end or spout  140 , and an intermediate conveyor section or housing  135  coupled between the upper and lower conveyor sections. Also described further herein are a tilting assembly  150 , and a folding assembly  152 . As described further herein, second conveyor assembly  116  is designed to allow upper conveyor section  136  and intermediate conveyor section  135  to tilt with respect to lower conveyor section  134  via tilting assembly  150  such that a position of discharge end relative to the frame can be adjusted (e.g., to increase the forward position or reach of the conveyor assembly). Additionally, a height of discharge end  140  can be adjusted to correspond to a trailer, truck, bin, or other receptacle. Second conveyor assembly  116  can be pivoted between a lowered and elevated position, and any position in between. In some embodiments, an operator is not limited to choosing solely between these two positions, but may also choose any position between an elevated position and a lowered position. It is appreciated that adjusting the height of discharge end  140  of second conveyor assembly  116  enables the height of discharge end  140  to more closely match a height of a trailer into which material from bin  114  is to be unloaded. Accordingly, a gap between discharge end  140  and the trailer is minimized, thereby minimizing loss of material from bin  114  due to wind during unloading. Moreover, the adjustable elevation makes it easier for operators to position the chute over the trailer. For example, the position (e.g., forward position or reach of the conveyor assembly) may be adjusted to increase operator visibility. Such adjustments also may lessen the amount that the tractor and cart have to move during the unload operating by allowing the discharge spout to move fore and aft (relative to the cart frame) to cover a larger range of trailer hopper length. It is appreciated that second conveyor assembly  116  may be configured to be controlled via a controller disposed on cart  100 , or can be controlled by a control system (e.g. remotely from a cab of the tractor or other suitable location). 
         [0036]    In one embodiment, the elevation of discharge end  140  of second conveyor assembly  116  may be adjusted from about 126 inches in a lowered position to about 161 inches in an elevated position. This range of heights is suitable to load most common trailers. The taller height is suitable for loading a tall trailer known as a Super B trailer, and the shorter height is suitable for loading a short trailer known a standard North American trailer. By more closely matching the height of the discharge end  140  to the height of the trailer, any gap between them is minimized thereby minimizing grain loss due to wind during the unloading process. 
         [0037]    As further described herein, second conveyor assembly  116  is designed to allow upper conveyor section  136  to fold with respect to lower conveyor section  134  and intermediate conveyor section  135  via folding assembly  152  at a folding joint  602  such that upper conveyor section can be folded back against a front or side of cart  100  while in storage, transport, or in other situations. For example,  FIG. 3  shows the second conveyor assembly  116  in both folded and unfolded positions. The various components of second conveyor assembly  116  will be described in further detail below. 
         [0038]    Lower conveyor section  134  has a lower or bottom end in communication with sump  132  and an upper or top end configured to couple with intermediate section  135 . In an embodiment, the lower conveyor section  134  is a tubular member of cylindrical configuration. A lower conveyor is movably (e.g., rotatably) disposed with lower conveyor section  134  to convey material, such as grain, from sump  132  to upper conveyor section  136 . The lower conveyor can be in the form of a rotatable auger or, in some embodiments, can be in the form of another suitable conveyor type for a grain cart, such as a suitable belt conveyor. 
         [0039]    In an embodiment, second conveyor assembly  116  is pivotable about tilt axes  402  and  502 . For example, in one embodiment, the lower tilt axis  402  can be positioned at an angle from vertical from 5° to 40°, for example, the lower tilt axis may be 15° or 30° from vertical.  FIG. 4B , which shows a section view along line E-E of  FIG. 4A , illustrates a tilt axis  402  having a 30° orientation from vertical. In this embodiment, upper and intermediate conveyor sections tilt relative to the lower conveyor section. 
         [0040]    Tilting assembly  150 , described below, may be configured to allow tilting about tilt axis  502  by a tilt angle of up to ±35°, or more preferably of up to ±20°. A negative angle indicates a rearward direction. For example, tilting assembly  150  may allow tilting by a forward tilt angle from 0° to 10° to 20° (in a forward direction), and from 0° to −10° to −20° (in a rearward direction). In some embodiments, slide coupling  411  (see  FIGS. 4A, 5A ) facilitates the tilting assembly allowing tilting of the second conveyor assembly  116  about the tilt axis  502 , by permitting second conveyor assembly  116  to slide along the a wall of the bin. 
         [0041]    In some embodiments, the lower tilt axis  402  is configured to such that the height of the discharge end of the upper conveyor section is at the lowest height position of the tilt movement when the upper and lower conveyor sections are inline to each other, so that the height of the discharge end increases during the tilt movement. In some embodiments this feature can be achieved by orienting the lower tilt axis  402  away from vertical in a direction such that the top of the tilt pivot is away from the upper conveyor tilt direction. In this case the top of the tilt pivot will be toward the bin  114 . To get a forward reach movement range that does not decrease the discharge height from when the upper and intermediate conveyor sections are in-line with the lower conveyor section, the angle is equal or greater to the amount of forward tilt angle. So in the case of tilting forward 20°, the lower tilt axis  402  off of vertical is at least 20°. This causes the discharge end to arch upward as it moves forward. If the lower tilt axis  402  is half of the total forward tilt angle, then the discharge end of the upper conveyor section will arch upward until a middle tilt angle. The second half of the tilt angle will then bring the discharge end downward. And the start and finished discharge height at the extreme ends of the tilt movement will be the same height. 
         [0042]    As used in this application, conveyor sections being in-line with each other refers to their longitudinal axes being substantially in-line. For example, the upper and intermediate conveyor sections are in-line means that the upper and intermediate conveyor sections are positioned such that their longitudinal axes are substantially in-line. 
         [0043]    In some embodiments, the lower conveyor section  134  is angled toward the hitch  122 . This is different from the configuration where the base of the lower conveyor section moves parallel to the front container wall. By having the lower conveyor section angled about half of the total forward tilt angle movement (e.g., total forward universal joint angle movement), this allows the second conveyor assembly to move at a greater total forward distance given, for example, the same universal joint angle limitation. For example, if the limit on the universal joint is 20°, the lower conveyor section would be angled forward 20 degrees. The intermediate and upper conveyor sections would move forward toward the hitch 20° as well as backwards 20° thereby providing a wider tilt movement range as well as getting the discharge end closer to the hitch. In some embodiments, a second universal joint may be used between the gearbox and the first fighting screw section. 
         [0044]    Intermediate section  135  is coupled to both upper conveyor section  136  and lower conveyor section  134  and is designed to allow upper conveyor section  136  and intermediate conveyor section  135  to securely tilt relative to lower conveyor section  134  without spilling material such as grain or seeds passing through second conveyor assembly  116 . Intermediate section  135  includes a rounded lower end configured to sit within a curved recess or cavity formed at the upper end of lower conveyor section  134 . 
         [0045]    Intermediate section  135  is coupled to upper conveyor section  136  via folding assembly  152 . Folding assembly  152  is configured to allow an intermediate housing flange of intermediate section  135  to abut against an upper conveyor housing flange of upper conveyor section  136  in an unfolded position, and further allows upper conveyor section  136  to pivot about a conveyor fold hinge pin relative to intermediate section  135  to position the upper conveyor section  136  in a folded position. For example,  FIG. 3  shows the second conveyor assembly  116  in both a folded position and an unfolded position. Folding assembly  152  can include a conveyor fold actuator  604 , such as a hydraulic cylinder, that is rotatably fixed at a first end to intermediate section  135  and rotatably fixed at a second end to upper conveyor section  136 . In some embodiments, the first end can be fixed at a location other than intermediate section  135  and the second end can be fixed at a location other than upper conveyor section  136 . For example, in some embodiments, the first end can be rotatably fixed on lower conveyor section  134 . As another example, the second end can be rotatably fixed on intermediate section  135 . Conveyor fold actuator  604  can, for example, be a hydraulic cylinder designed to facilitate folding and unfolding of upper conveyor section  136 . Conveyor fold actuator  604  can be configured to lock upper conveyor section  136  in either an unfolded or folded state as desired. 
         [0046]    Intermediate section  135  is coupled to lower conveyor section  134  via tilting assembly  150 . Tilting assembly  150  is configured to allow upper conveyor section  136  and intermediate section  135  to tilt relative to lower conveyor section  134 . Control logic may, in some embodiments, prevent the tilting operation to occur unless the upper conveyor section is locked in the unfolded or operating position. Tilting assembly  150  can, for example, include a conveyor tilt actuator  504 , such as a hydraulic cylinder, that is rotatably fixed at a first end to frame  112  and rotatably fixed at a second end to intermediate section  135 . In some embodiments, the first end can be fixed at a location other than frame  112  and the second end can be fixed at a location other than intermediate section  135 . For example, in some embodiments, the first end can be rotatably fixed to lower conveyor section  134  or to intermediate section  135 . As another example, the second end can be rotatably fixed to upper conveyor section  136 . 
         [0047]    Conveyor tilt actuator  504  can, for example, be a hydraulic cylinder for facilitating tilting of intermediate section  135  and upper conveyor section  136 . Conveyor tilt actuator  504  can be configured to lock upper conveyor section  136  in either a tilted or untilted (i.e., oriented in line with the lower conveyor housing) state as desired. Tilting assembly  150  can further include one or more conveyor tilt trunnions extending from intermediate section  135  along a tilt axis. Conveyor tilt trunnions can be designed such that they can be pivoted within a bearing assembly secured to lower conveyor section  134  or another suitable part of cart  100 , such as frame  112 . In some embodiments, the bearing assembly can be coupled to a bearing arm extending from lower conveyor section  134 . In some embodiments, conveyor tilt trunnions can be mounted on the lower conveyor section and a bearing assembly can be mounted on the intermediate section. 
         [0048]    Upper conveyor section  136  is coupled to lower conveyor section  134  via intermediate section  135 . Upper conveyor section  136  includes a lower or bottom end configured to abut the intermediate section  135  in an unfolded operating position and an upper or top end with a discharge end  140 , which can for example be in the form of a discharge spout. In the embodiment shown, the upper conveyor section  136  is a tubular member of cylindrical configuration, and an upper conveyor is movably (e.g., rotatably) disposed in the upper conveyor section such that a lower end of the upper conveyor is generally longitudinally aligned with folding joint  602 . Upper conveyor section  136  is configured to convey material, such as grain, from the lower conveyor section  134  to discharge end  140 . The upper conveyor of upper conveyor section  136  can be in the form of an auger. In some embodiments, the upper conveyor can be in the form of another suitable conveyor type for a grain cart, such as a suitable belt conveyor. 
         [0049]    In accordance with some embodiments, sump  132  and lower conveyor section  134  are designed to stay fixed relative to bin  114  and frame  112 . Upper conveyor section  136  is designed to pivot about a tilt axis, e.g., as defined by one or more shafts (e.g., trunnions). Such shafts can be secured by a bearing assembly, or bushings, to lower conveyor section  134 . The mating surfaces between intermediate section  135  and lower conveyor section  134  can be arched, curved or rounded, to allow for a secure tilting motion. The figures provided herein depict a semi-spherical shape, but this shape could instead be a boxed section, and include for example appropriate arched, curved or rounded sides. These surfaces can include a seal of some manner to seal material from escaping second conveyor assembly  116 . The tilt motion is moved by an actuator, which can for example be a linear actuator such as a hydraulic cylinder. One end of the actuator attached to the upper tilting portion, such as intermediate section  135 , upper conveyor section  136 , or another tilting portion of the second conveyor assembly  116 , and the other end can be fixed to lower conveyor section  134 , frame  112 , or another non-tilting portion of cart  100 . 
         [0050]    In some embodiments, a control system with a computer processor and a memory storing computer code for execution by the processor can be coupled to one or more of the actuators and configured to only allow the second conveyor assembly  116  to be folded once it is in a predetermined tilt position. For example, the control system can be configured to only allow second conveyor assembly  116  to be folded when it is in an untilted position. In some embodiments, the control system can be configured to receive a command to fold second conveyor assembly  116  and determine whether second conveyor assembly  116  is in an acceptable tilt position to allow folding. If the control system determines that second conveyor assembly  116  is not in an acceptable tilt position for folding, the control system can provide an alert to an operator, which can, for example, provide an indication to the operator to adjust the second conveyor assembly to a suitable tilt position. Alternatively or additionally, control system can automatically move second conveyor assembly  116  such that it is in a suitable tilt position without requiring operator intervention. In some embodiments, a suitable tilt position for folding can include the highest tilted position. In some embodiments, a suitable tilt position for folding can include a zero tilt position. In some embodiments, the control system moves the adjustable forward reach to a rearward position (e.g., moves the tilt axis to the −20° position) prior to moving the upper conveyor section to the transport position, thereby allowing the design to minimize tongue length and to prevent the upper conveyor section from hitting a tractor cab towing the cart or bin  114 . 
         [0051]    While the invention has been particularly taught and described with reference to certain preferred embodiments, those versed in the art will appreciate that modifications in form and detail may be made without departing from the spirit and scope of the invention. For example, although second conveyor assembly  116  is illustrated as being a corner auger located at the front left corner of bin  114  of cart  100 , second conveyor assembly  116  may alternatively be a corner auger located any corner of bin  114 . Further, the invention is also applicable to carts having an auger that is not a corner auger. 
         [0052]    By way of further example, while the second conveyor assembly  116  depicted in the figures is configured such that the upper conveyor section folds to a storage position in which the upper conveyor section extends across a front side of the bin in the storage position, it will be appreciated that the second conveyor assembly can be configured such that the upper conveyor section extends rearwardly along a side of the bin (e.g., a left side) in a storage position. 
         [0053]    It is appreciated that cart  100  can include one or more features of the grain carts described in the above-mentioned related applications which have been incorporated by reference. 
         [0054]    While various embodiments/variations of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments. Further, unless stated, none of the above embodiments are mutually exclusive. Thus, the present invention may include any combinations and/or integrations of the features of the various embodiments. For example, while the conveyor is shown as an auger with flighting, it will be appreciated that other types of conveyors, such as belt conveyors, can be used. Also, while wheels are shown coupled to a frame in the various embodiments, it will be appreciated that track assemblies comprising a track or belt looped around a plurality of wheels may be used. All numbers in this description and figures indicating amounts, ratios of materials, physical properties of materials, and/or use are to be understood as modified by the word “about,” except as otherwise explicitly indicated. Dimensions shown in the figures are designated in inches. The choice of materials for the parts described herein can be informed by the requirements of mechanical properties, temperature sensitivity, moldability properties, or any other factor apparent to a person having ordinary skill in the art. For example, one or more of the parts described herein (or a portion of one of the parts) can be made from suitable metals, alloys, plastics, and/or other suitable materials. 
         [0055]    In the preceding specification, various preferred embodiments have been described with reference to the accompanying drawings. It will, however, be evident that various modifications and changes may be made thereto, and additional embodiments may be implemented, without departing from the broader scope of the invention. The specification and drawings are accordingly to be regarded in an illustrative rather than restrictive sense. It is also appreciated that the steps of the various methods described herein may be performed in any suitable order. These and other modifications of the present invention are intended to be within the scope of the appended claims. 
         [0056]    For example, the second conveyor assembly may be configured such that the sections are positioned in the order lower conveyor section, tilt assembly, intermediate conveyor section, fold assembly, upper conveyor section. Alternatively, the second conveyor assembly may be configured such that the sections are positioned in the order lower conveyor section, fold assembly, intermediate conveyor section, tilt assembly, upper conveyor section. In this alternative embodiment, the intermediate and upper conveyor sections fold relative to the lower conveyor section, and the upper conveyor section tilts relative to the lower and intermediate conveyor sections.