Load cell attachment structure

• US 7,373,846 B2
• Filed: 09/02/2005
• Issued: 05/20/2008
• Est. Priority Date: 09/07/2004
• Status: Expired

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company), TS Tech Company Limited
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company), TS Tech Company Limited
• Inventors: Kojima, Mikihito, Furukawa, Takashi, Kumakiri, Naotaka, Yoshifuku, Masashi, Yamazaki, Tatsuya, Shindo, Toyohiko, Sato, Kenji, Endo, Shigeru, Nishide, Harutomi
• Primary Examiner(s): Lefkowitz; Edward
• Assistant Examiner(s): ROY, PUNAM P
• Application Number:
  US11/219,213
• Publication Number:
  US 20060048582A1
• Time in Patent Office: 991 Days
• Field of Search: 737/61, 738/626.21, 738/626.22, 738/626.32, 177/136, 177/144, 177/184, 177/187, 177/189
• US Class Current: 73/862.621
• CPC Class Codes: G01N 2203/0676 Force, weight, load, energy, speed or acceleration
• CPC Class Codes: G01N 3/02 Details

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

1. A load cell attachment structure for attaching a load cell to an attachment plate, comprising:

a first fastening part which is formed on a load sensing part 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, comprising:

a first fastening part which is formed on a load sensing part 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, comprising:

a male screw which is formed on a load sensing part 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, comprising:

a male screw which is formed on a load sensing part 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.