Load sensing pin

Patent metadata

Field	Value
Publication number	US-9338937-B2
Application number	US-201314047372-A
Country	US
Kind code	B2
Filing date	Oct 7, 2013
Priority date	Jan 8, 2007
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A load sensing pin disposed to receive a load applied in a direction substantially transverse to a longitudinal axis of the pin. A load sensor is substantially fixedly oriented with respect to the applied load or alternatively with respect to the pin which is rotationally restrained with respect to a support structure. The load sensor is disposed to generate a load signal corresponding to strain of the pin resulting from the applied load.

First claim

The invention claimed is:

1. An agricultural implement, comprising:
a frame;
a plurality of row units supported from said frame, each said row unit configured to open a trench, each said row unit including a subframe;
a depth adjusting mechanism incorporated in each of said plurality of row units, said depth adjusting mechanism configured to modify a depth of said trench;
a component which transfers load from said depth adjusting mechanism to said subframe, said component being substantially fixedly oriented with respect to said subframe; and
a load sensor mounted to said component, said load sensor disposed to generate load signals corresponding to strain of said component resulting from said load, wherein said load sensor is in communication with processing circuitry to operably communicate said load signal to said processing circuitry, said processing circuitry generating load values corresponding to said load signals, and visually displaying said generated load values on a display monitor visible to an operator of the agricultural implement.

2. The agricultural implement of claim 1 , wherein a correlation of said load signal to known loads is programmed into a microcontroller of said processing circuitry.

3. The agricultural implement of claim 2 , wherein said processing circuitry is configured to automatically regulate downforce based on said generated load signals as the agricultural implement traverses a field.

4. The agricultural implement of claim 1 , further comprising:
a restraint substantially fixedly orienting said component with respect to said subframe.

5. The agricultural implement of claim 1 , wherein said component is substantially rotationally restrained in relation to said subframe.

6. The agricultural implement of claim 1 , further comprising:
a restraint substantially rotationally restraining said component with respect to said subframe.

7. The agricultural implement of claim 1 , further comprising:
an opening disk blade disposed to open said trench; and
a gauge wheel disposed to rollingly contact a soil surface, said gauge wheel limiting said depth of said trench, wherein said load increases as a force between said gauge wheel and said soil surface increases.

8. The agricultural implement of claim 7 , wherein said component comprises a pin, whereby said depth adjusting mechanism is pivotally joined to said subframe by said pin.

9. The agricultural implement of claim 8 , further comprising:
an opening disk blade disposed to open said trench; and
a gauge wheel disposed to rollingly contact a soil surface, said gauge wheel limiting said depth of said trench, wherein said load increases as a force between said gauge wheel and said soil surface increases, and
wherein pivotal adjustment of said depth adjusting mechanism about said pin modifies a maximum height of said gauge wheel relative to said opening disk blade.

10. An agricultural implement, comprising:
a frame;
a plurality of row units supported from said frame, each said row unit configured to open a trench, each said row unit including a subframe;
a depth adjusting mechanism incorporated in each of said plurality of row units, said depth adjusting mechanism configured to modify a depth of said trench;
a component which transfers load from said depth adjusting mechanism to said subframe, said component being substantially fixedly oriented; and
a load sensor mounted to said component, said load sensor disposed to generate a load signal corresponding to strain of said component resulting from said load, wherein said load sensor is in communication with processing circuitry to operably communicate said load signal to said processing circuitry, said processing circuitry generating load values corresponding to said load signals and visually displaying said generated load values on a display monitor visible to an operator of the agricultural implement.

11. The agricultural implement of claim 10 , wherein a correlation of said load signal to known loads is programmed into said processing circuitry, and wherein said processing circuitry is configured to monitor said load.

12. The agricultural implement of claim 11 , wherein said processing circuitry is configured to automatically regulate downforce as the agricultural implement traverses a field.

13. The agricultural implement of claim 10 , further comprising:
a restraint substantially fixedly orienting said component.

14. The agricultural implement of claim 10 , wherein said component is substantially rotationally restrained.

15. The agricultural implement of claim 10 , further comprising:
a restraint substantially rotationally restraining said component.

16. The agricultural implement of claim 10 , further comprising:
an opening disk blade disposed to open said trench; and
a gauge wheel disposed to rollingly contact a soil surface, said gauge wheel limiting said depth of said trench, wherein said load increases as a force between said gauge wheel and said soil surface increases.

17. The agricultural implement of claim 16 , wherein said component comprises a pin, whereby said depth adjusting mechanism is pivotally joined to said subframe by said pin.

18. The agricultural implement of claim 17 , further comprising:
an opening disk blade disposed to open said trench; and
a gauge wheel disposed to rollingly contact a soil surface, said gauge wheel limiting said depth of said trench, wherein said load increases as a force between said gauge wheel and said soil surface increases, and
wherein pivotal adjustment of said depth adjusting mechanism about said pin modifies a maximum height of said gauge wheel relative to said opening disk blade.

19. The agricultural implement of claim 10 , further comprising:
a restraint substantially fixedly orienting said component.

20. The agricultural implement of claim 19 , wherein said component is substantially rotationally restrained.

21. The agricultural implement of claim 19 , further comprising:
a restraint substantially rotationally restraining said component.

22. The agricultural implement of claim 19 , further comprising:
an opening disk blade disposed to open said trench; and
a gauge wheel disposed to rollingly contact a soil surface, said gauge wheel limiting said depth of said trench, wherein said load increases as a force between said gauge wheel and said soil surface increases.

23. The agricultural implement of claim 22 , wherein said component comprises a pin, whereby said depth adjusting mechanism is pivotally joined to said subframe by said pin.

24. The agricultural implement of claim 23 , further comprising:
an opening disk blade disposed to open said trench; and
a gauge wheel disposed to rollingly contact a soil surface, said gauge wheel limiting said depth of said trench, wherein said load increases as a force between said gauge wheel and said soil surface increases, and
wherein pivotal adjustment of said depth adjusting mechanism about said pin modifies a maximum height of said gauge wheel relative to said opening disk blade.

25. The load sensing pin of claim 10 wherein said pin is under 4-point bending stress.

26. The load sensing pin of claim 10 wherein said pin is under 3-point bending stress.

27. The load sensing pin of claim 10 wherein said load sensor comprises a strain gauge transducer.

28. The load sensing pin of claim 12 wherei

Assignees

• Prec Planting Llc

Inventors

• Sauder Gregg A
• Sauder Derek A
• Koch Justin

Classifications

• A01B63/008 Primary

  Vertical adjustment of tools (A01B63/10 takes precedence) · CPC title

• A01B49/027

  with a rotating, soil working support element, e.g. a roller · CPC title

• G01L1/2218

  the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction · CPC title

• G01L5/0038

  applying a pushing force · CPC title

• G01L5/136

  Force sensors associated with a vehicle traction coupling (vehicle connections B60D; control of vehicle brakes B60T) · CPC title