Cooler, housing, and rotating electric machine

1 . A housing comprising:

a cooler configured to define a coolant passage of the housing;

an outer tube component configured to constitute an outer peripheral portion of the housing; and

an inner tube component configured to constitute an inner peripheral portion of the housing,

wherein

each of the cooler, the outer tube component, and the inner tube component is constituted by a separate cylindrical component,

the cooler is disposed radially outward of the inner tube component,

the outer tube component is disposed radially outward of the cooler and the inner tube component,

an outer tube flange formed at one end of the outer tube component and an inner tube flange formed at one end of the inner tube component are connected to integrate the outer tube component, the cooler, and the inner tube component,

the cooler includes:

a base material; and

a plurality of ribs protruding from a main surface of the base material,

a first end portion of the base material is located at an inflow end into which a coolant flows,

a second end portion of the base material is located at an outflow end from which the coolant flows out,

the plurality of ribs include a first rib group including a plurality of the ribs arranged in a second direction that intersects a first direction which is a direction from the first end portion of the base material toward the second end portion of the base material,

the first rib group includes a first rib among the plurality of ribs, a second rib among the plurality of ribs, and a third rib among the plurality of ribs,

the second rib is located between the first rib and the third rib,

a distance between a base end of the first rib and a base end of the second rib in the second direction is larger than a distance between a protruding end of the first rib and a protruding end of the second rib in the second direction, and

a distance between the base end of the second rib and a base end of the third rib in the second direction is smaller than a distance between the protruding end of the second rib and a protruding end of the third rib in the second direction.

2 . The housing according to claim 1 , wherein

the plurality of ribs further include a second rib group located in the first direction with respect to the first rib group,

the second rib group includes a fourth rib among the plurality of ribs, and a fifth rib among the plurality of ribs,

at least a portion of the fourth rib is located in a first extension space obtained by virtually extending a first partial passage defined by the first rib and the second rib,

at least a portion of the fifth rib is located in a second extension space obtained by virtually extending a second partial passage defined by the second rib and the third rib, and

a distance between a base end of the fourth rib and a base end of the fifth rib in the second direction is different from a distance between a protruding end of the fourth rib and a protruding end of the fifth rib in the second direction.

3 . The housing according to claim 1 , wherein

a direction in which each of the ribs protrudes is inclined at 3 to 45 degrees with respect to the main surface of the base material.

4 . The housing according to claim 1 , wherein

a distance between an upstream side end portion of the first rib and an upstream side end portion of the second rib in the second direction is different from a distance between a downstream side end portion of the first rib and a downstream side end portion of the second rib in the second direction.

5 . A rotating electric machine comprising the housing according to claim 1 .

6 . The housing according to claim 1 , wherein

thermal grease is applied to at least part of an outer peripheral surface of the inner tube component, and

the cooler is fitted to an inner side of the inner tube component.