USRE43989EExpiredUtilityPatentIndex 92

Load cell attachment structure

Assignee: HONDA MOTOR CO LTDPriority: Sep 7, 2004Filed: May 20, 2010Granted: Feb 12, 2013

Est. expirySep 7, 2024(expired)· nominal 20-yr term from priority

Inventors:FURUKAWA TAKASHI KUMAKIRI NAOTAKA KOJIMA MIKIHITO YOSHIFUKU MASASHI YAMAZAKI TATSUYA SHINDO TOYOHIKO NISHIDE HARUTOMI ENDO SHIGERU SATO KENJI

G01N 3/02G01N 2203/0676

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Claims

Abstract

This load cell attachment structure includes a male screw which is formed on a load sensing part of the load cell, a nut which attaches the load cell to the attachment plate by engaging with the male screw, and a wave washer which is disposed between the attachment plate and the nut.

Claims

exact text as granted — not AI-modified

1. A load cell attachment structure for attaching a load cell to an attachment plate, the load cell including a main body and a load sensing part, the load cell attachment structure comprising:
a first fastening part which is formed on a load sensing part the main body of the load cell;
a second fastening part which attaches the load cell to the attachment plate by engaging with the first fastening part;
an elastic body which is disposed between the attachment plate and the second fastening part; and
a washer part which entirely covers the load sensing part, and is disposed between the attachment plate and the load sensing part.

2. A load cell attachment structure according to claim 1 , further comprising:
a collar part which is disposed between the washer part and the second fastening part, wherein
a length of the collar part along an axis thereof is longer than a thickness of the attachment plate.

3. A load cell attachment structure according to claim 2 , wherein
the first fastening part comprises a male screw,
the second fastening part comprises a nut,
the elastic body is disposed between the attachment plate and the nut, and
the collar part is disposed between the washer part and the nut.

4. A load cell attachment structure according to claim 2 , wherein the collar part is formed as a single body with the washer part.

5. A load cell attachment structure for attaching a load cell to an attachment plate, the load cell including a main body and a load sensing part, the load cell attachment structure comprising:
a first fastening part which is formed on a load sensing part the main body of the load cell;
a second fastening part which attaches the load cell to the attachment plate by engaging with the first fastening part;
a washer part which entirely covers the load sensing part, and is disposed between the load sensing part and the attachment plate; and
a collar part which is disposed between the washer part and the second fastening part, wherein
a length of the collar part along an axis thereof is longer than a thickness of the attachment plate.

6. A load cell attachment structure according to claim 5 , wherein
the first fastening part comprises a male screw,
the second fastening part comprises a nut, and
the collar part is disposed between the washer part and the nut.

7. A load cell attachment structure according to claim 5 , wherein the collar part is formed as a single body with the washer part.

8. A load cell attachment structure for attaching a load cell to an attachment plate, the load cell including a main body and a load sensing part, the load cell attachment structure comprising:
a male screw which is formed on a load sensing part the main body of the load cell and which is inserted into an attachment hole formed in the attachment plate;
a nut which attaches the load cell to the attachment plate by engaging with the male screw;
an elastic body which is disposed between the attachment plate and the nut fastened on the male screw; and
a washer having a washer part and a collar part and which is disposed between the load sensing part and the attachment plate, in which the washer part covers all of the load sensing part and contacts the load sensing part, and the collar part is disposed between the washer part and the nut, wherein
the male screw is inserted into the collar part,
the collar part is inserted into the attachment hole,
the length of the collar part along an axis thereof is longer than a thickness of the attachment plate to have a space between the nut and the attachment plate, and
the elastic body having a thickness greater than the space is disposed between the attachment plate and the nut, and the nut is engaged with the male screw until the nut contacts the collar part.

9. A load cell attachment structure for attaching a load cell to an attachment plate, the load cell including a main body and a load sensing part, the load cell attachment structure comprising:
a male screw which is formed on a load sensing part the main body of the load cell and which is inserted into an attachment hole formed in the attachment plate;
a nut which attaches the load cell to the attachment plate by engaging with the male screw;
a plate-spring which is composed of a flat plate part and a tapered part disposed on the outside edge of the flat plate part and which is disposed between the attachment plate and the nut fastened on the male screw to push the attachment plate to the load sensing part; and,
a washer having a washer part and a collar part and which is disposed between the load sensing part and the attachment plate, in which the washer part contacts the load sensing part, and the collar part is disposed between the washer part and the nut;
wherein the flat plate part of the plate spring is disposed between the collar part and the nut.

10. The load cell attachment structure according to claim 9 , wherein an elastic cover is disposed on an edge of the attachment hole.

11. The load cell attachment structure according to claim 10 , wherein a space is formed between the elastic cover and the collar part.

12. The load cell attachment structure of claim 10 , wherein the elastic cover is disposed between the attachment plate and the washer part.

13. The load cell attachment structure according to claim 9 , wherein a second washer is disposed between the flat plate part and the collar part.

14. The load cell attachment structure according to claim 13 , wherein a third washer is disposed between the nut and the flat plate part, and an outer diameter of the third washer is larger than that of the second washer.

15. The load cell attachment structure according to claim 2, wherein the elastic body is arranged at a periphery of the collar part.

16. The load cell attachment structure according to claim 4, wherein the elastic body is arranged at a periphery of the collar part.

17. The load cell attachment structure according to claim 1, wherein the washer part contacts the load sensing part.

18. The load cell attachment structure according to claim 1, wherein an outer edge of the elastic body is farther than a periphery of the main body of the load cell from the first fastening part arranged at a center of the main body.

19. The load cell attachment structure according to claim 1, wherein the washer part is larger in diameter than the load sensing part.

20. The load cell attachment structure according to claim 1, wherein an outer edge of the elastic body is farther than a periphery of the main body of the load cell from the male screw arranged at the center of the main body.

21. The load cell attachment structure according to claim 7, wherein the load cell warps when load downwardly acts on the load sensing part, and thereby the load acting on the load sensing part is measured by the load cell.

22. The load cell attachment structure according to claim 7, further comprising an elastic body which is disposed between the washer part and the second fastening part.

23. The load cell attachment structure according to claim 22, wherein the elastic body includes an inclination part.

24. The load cell attachment structure according to claim 5, wherein the washer part contacts the load sensing part.

25. The load cell attachment structure according to claim 5, wherein the load cell warps when a load downwardly acts on the load sensing part, and thereby the load acting on the load sensing part is measured by the load cell.

26. The load cell attachment structure according to claim 5, further comprising an elastic body which is disposed between the washer part and the second fastening part.

27. The load cell attachment structure according to claim 26, wherein the elastic body includes an inclination part.

28. The load cell attachment structure according to claim 26, wherein a second washer is disposed between the collar part and a nut included in the second fastening part.

29. The load cell attachment structure according to claim 26, wherein the elastic body includes a bending part.

30. The load cell attachment structure according to claim 26, wherein an end of the elastic body close to the second fastening part contacts a second washer.

31. The load cell attachment structure according to claim 26, wherein the attachment plate includes an attachment hole to which the first fastening part is inserted, and
a cover is disposed between a hole portion and the collar part.

32. The load cell attachment structure according to claim 31, wherein the cover prevents the collar part from contacting an attachment hole of an attachment plate.

33. The load cell attachment structure according to claim 31, wherein the cover is an independent member from the elastic body.

34. The load cell attachment structure according to claim 31, wherein the cover comprises an insertion portion to be inserted to the attachment hole, and an extension part outwardly-extending in a radial direction from the insertion portion.

35. The load cell attachment structure according to claim 31, wherein the elastic body includes a bending part.

36. The load cell attachment structure according to claim 5, wherein a second washer is disposed between the collar part and a nut included in the second fastening part.

37. The load cell attachment structure according to claim 5, further comprising an elastic body which is disposed between the attachment plate and the second fastening part, wherein the elastic body includes a bending part.

38. The load cell attachment structure according to claim 5, wherein the washer part is larger in diameter than the load sensing part.

39. The load cell attachment structure according to claim 5, further comprising an elastic body which is disposed between the attachment plate and the second fastening part, wherein an end of the elastic body close to the second fastening part contacts a second washer.

40. The load cell attachment structure according to claim 5, further comprising an elastic body which is disposed between the attachment plate and the second fastening part, wherein the elastic body is arranged at a periphery of the collar part.

41. The load cell attachment structure according to claim 5, further comprising an elastic body which is disposed between the attachment plate and the second fastening part, wherein an outer edge of the elastic body is farther than a periphery of the main body of the load cell from the male screw arranged at the center of the main body.

42. The load cell attachment structure according to claim 5, wherein the attachment plate includes an attachment hole to which the first fastening part is inserted, and
a cover is disposed between a hole portion and the collar part.

43. The load cell attachment structure according to claim 42, wherein the cover prevents the collar part from contacting an attachment hole of an attachment plate.

44. The load cell attachment structure according to claim 8, wherein the washer part contacts the load sensing part.

45. The load cell attachment structure according to claim 8, wherein an outer edge of the elastic body is farther than a periphery of the main body of the load cell from the male screw arranged at a center of the main body.

46. The load cell attachment structure according to claim 8, wherein the elastic body is arranged at a periphery of the collar part.

47. The load cell attachment structure according to claim 8, wherein the washer part is larger in diameter than the load sensing part.

48. A load cell attachment structure for attaching a load cell to an attachment plate, the load cell including a main body and a load sensing part, the load cell attachment structure comprising:
a first fastening part which is formed on the main body of the load cell; a second fastening part which attaches the load cell to the attachment plate by engaging with the first fastening part; a washer part which entirely covers the load sensing part, and is disposed between the load sensing part and the attachment plate; a collar part which is disposed between the washer part and the second fastening part; and an elastic body which is disposed between the washer part and the second fastening part, wherein the elastic body is arranged at a periphery of the collar part, and a length of the collar part along an axis thereof is longer than a thickness of the attachment plate.

49. The load cell attachment structure according to claim 48, wherein the elastic body includes an inclination part.

50. The load cell attachment structure according to claim 48, wherein a second washer is disposed between the collar part and a nut included in the second fastening part.

51. The load cell attachment structure according to claim 48, wherein the elastic body includes a bending part.

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