Root pump
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsMasahiro Inagaki, Shinya Yamamoto, Makoto Yoshikawa, Yuya Izawa
Life of this patent
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Abstract
A housing of a Roots pump is configured by joining a lower housing member and an upper housing member that are separable from each other. With the upper and lower housing members joined together, an upper accommodating portion and a lower accommodating portion form a front bearing accommodating portion and a rear bearing accommodating portion, which accommodate whole bearings, respectively. The Roots pump further includes bearing holders attached to the bearings and fixed to the lower housing member so that the bearings are received in the lower accommodating portion in a positioned state.
Claims5
A root pump comprising a rotary shaft, a housing supporting the rotary shaft through a bearing, and a rotor rotatable integrally with the rotary shaft, the root pump transporting fluid through rotation of the rotor together with the rotary shaft,
- wherein the housing is a two-piece structure comprising a lower housing member and an upper housing member,
- wherein the lower housing member includes a lower accommodating portion that has an upward opening so as to receive a lower portion of the bearing and the upper housing member includes an upper accommodating portion that has a downward opening so as to accommodate an upper portion of the bearing, wherein, with the upper and lower housing members joined together, the upper and lower accommodating portions form a bearing accommodating portion that accommodates the entire bearing, and
- wherein the root pump includes a positioning member that is attached to the bearing and fixed to the lower housing member in such a manner that the bearing is accommodated in the lower accommodating portion in a positioned state.
Dependencies are inferred from the claim text.