Overhead wire tensioning device
AssigneesCentral Japan Railway Company, Dengyo Incorporated, NHK Spring Co., Ltd.
InventorsSatoshi Ageishi, Hiroshi Amano, Yoshio Narumiya, Toru Uchikoshi, Shoji Konta, Yoshinori Wakabayashi, Takeyoshi Shinbori, Takeshi Uchida
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Abstract
The overhead wire tensioning device of the present invention is improved in reliability and eliminates the need for constant maintenance work by protecting the slide mechanism between the cylinder case of the gas spring type overhead wire tensioning device and the cylinder rod, and the pivoting mechanism for the connecting rod connecting this cylinder with the overhead wire from external influences.
Claims7
A tensioning device for applying a prescribed tension to overhead wire, comprising:
- a tubular outer casing having a first end connected to a fixed part;
- a spring mechanism received in said tubular outer casing and having one end fixed to a second end of said outer casing inside said outer casing;
- a tension rod having one end connected to the overhead wire, and another end received inside said outer casing and pivotally supported by the other end of the spring mechanism so as to accommodate a variable tension of the overhead wire, said one end of said tension rod extending out of an opening which is formed at said second end of said outer casing;
- said outer casing being substantially enclosed except for said opening, and a swaying movement of said overhead wire being accommodated by a pivoting movement of said tension rod to an extent permitted by said opening;
- and
- wherein said first end connected to said fixed part is located at a first axial end of the tubular outer casing and said second end of the outer casing in which said opening is formed is located at a second axial end of the tubular outer casing.
An overhead wire tensioning device, comprising:
- a tubular outer casing having a first end connected to a fixed part;
- a spring mechanism received in said tubular outer casing and having one end fixed to a second end of said outer casing inside said outer casing;
- a tension rod having one end connected to the overhead wire, and another end received inside said outer casing and pivotally supported by the other end of the spring mechanism so as to accommodate a variable tension of the overhead wire, said one end of said tension rod extending out of an opening which is formed at said second end of said outer casing;
- said outer casing being substantially enclosed except for said opening, and a swaying movement of said overhead wire being accommodated by a pivoting movement of said tension rod to an extent permitted by said opening;
- and
- wherein said spring mechanism comprises a gas spring including a cylinder case defining a sealed gas chamber filled with high pressure gas and an oil chamber capable of expanding and shrinking so as to transmit pressure, and a cylinder rod having one end passed into the oil chamber so as to be moveable in an axial direction.
Dependencies are inferred from the claim text.