Bolt and a nut locking mechanism
AssigneeHitachi, Ltd.
InventorsTakeji Shiokawa, Toshimitsu Nakagawa, Mitsukiyo Tani
Life of this patent
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Abstract
A present invention provides a locking mechanism capable of preventing a bolt from loosening. A bolt 5 has a head provided with a first part which comprises openings 511. A locking washer 4 is provided with a second part which includes outer projections 411 and a third part which includes insertion projections 401 on an outer edge. A taper piece 1 has a portion provided with a fourth part which comprises openings 105. The first part and the second part can engage with each other and the third part and the fourth part can engage with each other when said bolt 5 fastens at least two members 7 and 8 trough said washer 4 and said taper piece 1. Accordingly, the bolt 5 is prevented from rotating in an loosening direction.
Claims19
A bolt locking mechanism, comprising:
- a bolt for fastening at least two members together, said bolt having a head and a shaft and one of said head and shaft is provided with a first part in the side;
- a plate member for putting between said bolt and one of the members, said plate member having a second part on one face to be contacted with said bolt and a third part on another face and a first hole for passing said bolt through;
- a taper piece for embedding in said one of the members, said taper piece having a portion provided with a fourth part on a face to be contacted with said another face of said plate member and a second hole for passing said bolt through;
- wherein, when said bolt fastens the members through said plate member and said taper piece, said first part and second part engage with each other and said third part and said fourth part engage with each other for preventing said bolt from loosening respectively.
A locking mechanism, comprising:
- a bolt and a nut for fastening at least two members together, one of said bolt and said nut having a first part;
- a taper piece for embedding in one of the members, said taper piece having a portion provided with a second part on a face to contact with one of said bolt and said nut and a hole for passing said bolt through;
- and
- wherein said first part and said second part engage with each other for preventing one of said bolt and said nut from loosening when said bolt and said nut fasten the members through said taper piece.
A nut locking mechanism, comprising:
- a bolt and a nut for fastening at least two members together between said bolt and said nut;
- wherein said nut is provided with a first part in the side;
- a plate member for putting between said nut and one of the members, said plate member having a second part on one face to contact with said nut and a third part on another face and a first hole for passing said bolt through;
- a taper piece for embedding in said one of the members, said taper piece having a portion provided with a fourth part on a face to contact with said another face of said plate member and a second hole for passing said bolt through;
- wherein, when said bolt and said nut fasten the members through said plate member and said taper piece, said first part and second part engage with each other and said third part and said forth part engage with each other for preventing said nut from loosening, respectively.
Dependencies are inferred from the claim text.