Gear pump and printing apparatus provided with same
AssigneeSeiko Epson Corporation
InventorsMasaaki ANDO, Noritaka MITSUO, Norihiro MARUYAMA
Life of this patent
Estimating the term…
Abstract
A gear pump includes a pump casing and a gear assembly. The gear assembly includes a driving gear, a driven gear, a driving gear shaft, a driven gear shaft, and a bearing frame. The bearing frame includes a frame main body, a pair of driving side bearing portions, and a pair of driven side bearing portions. The frame main body has a pair of bearing support potions, in which the driving side bearing portion and the driven side bearing portion are provided, and a connecting portion which connects the bearing support portions. The bearing support portions and the connecting portion are integrated together as a one-piece member.
Claims14
A gear pump for transporting a fluid comprising:
- a pump casing;
- and
- a gear assembly which is accommodated in the pump casing,
- the gear assembly including
- a driving gear,
- a driven gear that meshes with the driving gear,
- a driving gear shaft to which the driving gear is attached,
- a driven gear shaft to which the driven gear is attached, and
- a bearing frame that rotatably supports the driving gear shaft and rotatably supports the driven gear shaft,
- the bearing frame including
- a frame main body,
- a pair of driving side bearing portions which is provided in the frame main body and which supports the driving gear shaft, and
- a pair of driven side bearing portions which is provided in the frame main body and which supports the driven gear shaft,
- the frame main body having a pair of bearing support potions, in which the driving side bearing portion and the driven side bearing portion are provided, and a connecting portion which connects the bearing support portions, the bearing support portions and the connecting portion being integrated together as a one-piece member.
A manufacturing method for a gear pump for transporting a fluid comprising:
- providing a pump casing;
- and
- providing a gear assembly in the pump casing, the gear assembly including
- a driving gear,
- a driven gear that meshes with the driving gear,
- a driving gear shaft to which the driving gear is attached,
- a driven gear shaft to which the driven gear is attached, and
- a bearing frame that rotatably supports the driving gear shaft and rotatably supports the driven gear shaft,
- the bearing frame including
- a frame main body,
- a pair of driving side bearing portions which is provided in the frame main body and which supports the driving gear shaft, and
- a pair of driven side bearing portions which is provided in the frame main body and which supports the driven gear shaft,
- the frame main body having a pair of bearing support potions, in which the driving side bearing portion and the driven side bearing portion are provided, and a connecting portion which connects the bearing support portions,
- the providing of the gear assembly including integrally forming the frame main body by the bearing support portions and the connecting portion.
Dependencies are inferred from the claim text.