Patent Application
20060016634
This invention deals generally with automatic bale wagons of the type adapted to pick up crop material bales in the field and automatically form stacks of these bales utilizing a variety of selected stacking patterns to form a stable, interlocked stack of bales.
Present day practices in crop harvesting involve the formation of bales of crop material such as hay or other crops into stacks for storage by using an automatic bale wagon. One type of bale wagon that has achieved wide spread commercial acceptance is the automatic bale wagon which uses three tables.
Such bale wagons include a first table which receives bales from a bale loader or pick up device mounted on the bale wagon. The first table accumulates a predetermined number of bales with the bales being arranged in a row in a pattern determined by a computer on board the bale wagon. A second table receives the rows of bales from the first table and accumulates several such rows. This group of rows is commonly referred to as a “tier”. A third table or load rack then receives the tiers from the second table and accumulates these tiers to form a “stack” on the load rack.
Once the stack has been accumulated on the load rack, it may be unloaded by pivoting the load rack 90 degrees and depositing the stack on the ground or other surface so that the first tier of bales which was accumulated on the second table is now the lowermost tier of the stack on the ground surface.
Although the stack arranging apparatus for such bale wagons is automatic, the loading and unloading functions of such wagons still requires many manual controls, because such functions vary with every load and must be coordinated with the position of the bale wagon. The loading and unloading controls have typically included two large control levers and an array of electrical switches. The control levers are directly linked to mechanical rods that operate hydraulic controls on the bale wagon, and the electrical switches control other functions.
The difficulty with such an arrangement is that the frequent push and pull movements of the levers lead to significant operator fatigue. Furthermore, the mechanical linkages required between the control levers and the mechanical operating rods limit the ability to isolate the operator cab from the vibration and noise of the bale wagon's operations.
It would be very beneficial to have a control system that not only reduces operator fatigue but also isolates the operator from the noise and vibration.
The present invention completely eliminates the mechanical linkages between the control and operating system of a bale wagon and uses a completely electronic control system for the loading and unloading controls of bale wagons. Each of the new electronic controls is interconnected with a control circuit or computer that operates a solenoid valve within the bale loader's hydraulic system, and the solenoid valves operate hydraulic cylinders or motors that provide the necessary motion to perform the final task. This arrangement not only makes it possible to completely isolate the operator cab from mechanical vibrations caused by the previous mechanical linkages, but the location and layout of the controls are designed to minimize operator fatigue and allow the position of the controls to be adjusted for individual operator's preferences. Furthermore, the new controls are designed so that, although several electronic controls are added, they do not require any expansion of the operator cab's control panel and they are located at the operator's fingertips when the operator's arm is resting on the armrest of the operator's seat.
All this is accomplished by adding a handle-style loading control panel mounted on a support tube that protrudes out of the approximately horizontal surface of the conventional planar control panel. The loading control panel has two sections which are oriented an angle to each other, and each section has a surface facing the operator's position. In the preferred embodiment, one section is near horizontal and is located just above the conventional planar control panel. It is essentially a hand rest section upon which the palm of the operator's hand can be rested, and the other section, a control section, includes the loading and unloading pushbutton controls on its side surface. The pushbuttons can then be operated by the operator's thumb. Moreover, when the operator's hand is resting on the hand rest section, the controls on the surface of the conventional planar control panel are within easy reach of the fingers of that hand. Thus, the operator's arm does not have to move any significant distance or push against any force since the loading control panel itself does not move.
The loading control panel of the invention can also be repositioned to adjust to the operators reach, chair position, and posture. This adjustment is available in three directions. The first adjustment is axial along the support tube. The support tube of the loading control panel is actually constructed as an inside tube telescoping within a second slightly larger concentric outer tube. The outer tube has a circular clamp, similar to a pipe damp, at its top end. This clamp is tightened to hold the inner tube or loosened to permit raising or lowering the inner tube and the loading control panel attached to it. Furthermore, when the clamp atop the outer tube is loosened, the loading control panel can also be rotated to adjust its orientation relative to the operator's seat within the control cab and a user's hand. The use of hollow tubes for the support structure allows the wires interconnecting the loading control panel with the control circuitry to be held and protected within the tubes, and provides the means for the wires to penetrate the conventional planar control panel.
The support tube and loading control panel can also be pivoted forward away from the operator′ seat or back toward the operator's seat. This is accomplished in the preferred embodiment by attaching the bottom of the support tube to a slot within a vertical panel and clasping the upper part of the support tube with a tight fitting grommet as the tube passes through the conventional planar control panel. Thus, by loosening a thumbscrew passing through the bottom slot, the support tube and loading control panel can be pivoted forward and back at the tight fitting grommet as the thumbscrew slides within the slot.
An alternate arrangement for pivoting the support tube uses a ball joint on the existing control panel and lock screws on the ball joint. This apparatus furnishes an additional direction of motion for the adjustment by also allowing right and left adjustment along with forward and back.
Overall, the present invention provides a compact, ergonomically comfortable loading control panel that takes up very little space in a bale wagon control cab.
Referring to
Bale wagon 10 is provided with bale loader 18 adapted to pick bales up from the field and deposit them on first table 20. First table 20 is provided with cross conveyor 22 positioned between rails 24 and 26, so that the bales are dropped onto the first table 20 and are held by cross conveyor 22.
Cross conveyor 22 initially receives the bales and moves them toward the left side (the far side in
After the appropriate number of bales has been deposited on first table 20, first table 20 operates to deposit the bales onto second table 28. Depending upon the way in which first table rails 24 and 26 are actuated, the bales will be placed upon second table 28 in either the “on edge” or “flat” orientation. After a plurality of bales has been deposited on second table 28 so as to form a tier 30, second table 28 is operated to deposit tier 30 onto load rack 32. For this purpose, hydraulic cylinder 34 is used for raising table 28.
Load rack 32 has a plurality of support tines 36 at its rear end, and also has rolling rack 38 against which the various tiers of bales are deposited. As succeeding tiers are deposited onto load rack 32, rolling rack 38 is retracted a distance substantially equal to the thickness of a tier, thus providing the necessary space for newly added tier 30. After a complete stack has been formed on load rack 32, the operator of the bale wagon drives the wagon to the appropriate location for storage of the stack, and then actuates the appropriate control mechanism to extend hydraulic cylinder 40 causing load rack 32 to pivot approximately 90 degrees. Thereafter, pusher feet (not shown) are extended and the stack of bales is pushed off of support tines 36 and deposited on the ground. Load bed 32 is then returned to its position shown in
As shown in
Button 48 is the auto/manual button and is used to switch the stack pattern system between automatic and manual modes. The stack pattern system determines the pattern in which the bales are stacked, and each time button 48 is pushed, the system switches from the mode it is in to the other mode. The mode in which the bale wagon is operating is indicated on a display (not shown) on the conventional planar control panel in the cab.
Button 50 is the bale loader control. Pressing the left side of switch 50 lowers bale loader 18, and pressing the right side of switch 50 raises bale loader 18. Button 52 is the control that starts and stops the bail loader chain (not shown) that is located within bale loader 18. A second button 54 performs the same actions as button 52 and is located on the backside of hand rest section 46 so that it can be pushed by the operator's fingers. Button 56 controls cross conveyor 22 and is used to start and stop cross conveyor 22 when bale wagon 10 is in manual mode.
Buttons 52 and 54 are a significant change for the operator as they replace the need to push a lever with the action of pressing a switch. The prior art used a large lever to activate the bale loader chain that raises bales to the first table. Over the course of a work day the fore and aft movement of the lever required for each bale was very fatiguing to the operator. Replacing this arm motion with a simple button results in a more ergonomic action and reduces operator fatigue.
Switch 58 controls both tables 1 and 2. Pressing the top, labeled as 1, raises second table 28, and pressing the bottom, labeled as 2, lowers second table 28. Pressing the left side of switch 58, labeled 3, delivers bales from first table 20 to second table 28 in the “flat” condition. Pressing the right side of switch 58, labeled 4, delivers the bales to second table 28 “on edge”.
Switch 60 is the load rack and rolling rack control and is the most complex control on loading control panel 42 because it is actually a six position switch. Pressing the top of switch 60, labeled 1, raises load rack 32, and pressing the bottom of switch 60, labeled 2, lowers load rack 32. Each of these switch positions is itself a two part switch. Pressing either position part way provides a slow speed while pressing it fully provides a faster speed. The right and left sides of switch 60 control rolling rack 38. Pressing the left side, labeled 3, moves rolling rack 38 to the rear of load rack 32, while pressing the right side of switch 60, labeled 4, moves rolling rack 38 forward on load rack 32. Pressing positions 2 and 4 of switch 60 simultaneously brings rolling rack 38 forward while lowering load rack 32.
The remaining switches on loading control panel 42 are push-off feet switches 62 and 64. The push-off feet (not shown in
The adjustment of loading control panel 42 is available in three directions. The axial extension adjustment is available to move loading control panel 42 away from conventional planar control panel 74. This is easily accomplished in the preferred embodiment in which support tube 44 is an inside tube that can be slid within outer tube 45 that is slightly larger than and concentric with support tube 44. Outer tube 45 has circular clamp 66, similar to a pipe clamp, at its top end. Clamp 66 is tightened to hold support tube 44 in position or loosened to permit raising or lowering support tube 44 and loading control panel 42 attached to it. Also, when clamp 66 atop outer tube 45 is loosened, loading control panel 42 can be rotated to adjust its orientation relative to the operator's seat (not shown) within control cab 16.
In the preferred embodiment of the invention, loading control panel 42 can also be pivoted forward away from the operator's seat in control cab 16 or back toward the operator's seat. Thumbscrew 70 attaches the bottom of outer tube 45 to vertical panel 68 of the cab at slot 72 which is formed in vertical panel 68, and the upper region of the outer tube 45 passes through conventional planar control panel 74 with grommet 76 clasped tightly on outer tube 45. Thus, by loosening thumbscrew 70 within slot 72, outer tube 45, along with loading control panel 42 can be pivoted forward and back as thumbscrew 70 slides within slot 72 and outer tube 45 pivots within grommet 76.
It should be appreciated that support tube 44 and outer tube 45 are not part of the bale wagon control operation and do not move for that purpose. They are required to be stationary during operation of the bale wagon, and their only movements are for the purpose of ergonomically adjusting the position of loading control panel 42 for the operator. Furthermore, support tube 44 and outer tube 45 together form a conduit for the wires necessary to connect all the controls on loading control panel 42 to the control circuitry (not shown) of bale wagon 10, and support tube 44 and outer tube 45 also furnish a convenient and safe way for the wires to penetrate conventional planar control panel 74.
The present invention thereby provides a wide selection of additional electronic controls for loading and unloading a bale wagon, and does so without significant encroachment on the limited space in the operator cab. Furthermore the new controls are easily accessible and do not cause operator fatigue.
It is to be understood that the form of this invention as shown is merely a preferred embodiment. Various changes may be made in the function and arrangement of parts; equivalent means may be substituted for those illustrated and described; and certain features may be used independently from others without departing from the spirit and scope of the invention as defined in the following claims.
For example, loading control panel 42 can be used for other control functions and with more or fewer control buttons Moreover, additional controls can be located on the backside of loading control panel 42 along with or in place of button 54, and a different type of clamp can be used to hold support tube 44 within outer tube 45. Furthermore, an entirely different apparatus could be used to furnish the axial extension of support tube 44.
