Motor control unit cooling device
First Claim
1. A cooling apparatus for an electric motor control unit comprising a heat sink (H) contacting a module (Um, Ug) of an electric motor control unit (U), a concave portion (20b) continuously formed in the heat sink, and a wall member (22) mounted on an opening face side of the concave portion so as to be fixed to the heat sink, which defines a coolant passage in the heat sink together with the concave portion of the heat sink, characterized in that the heat sink includes a projection (20e) projecting from a mounting surface with respect to the wall member;
- the wall member includes a hole (22a) fitted into the projection; and
the wall member is fixed to the heat sink by caulking the projection of the heat sink.
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Accused Products
Abstract
A cooling apparatus for an electric motor control unit includes a heat sink H contacting modules of the unit, a concave portion continuously formed in the heat sink and a wall member 22 mounted on an opening face side of the concave portion so as to be fixed to the sink, which defines a coolant passage L in the heat sink together with the concave portion of the heat sink. In the heat sink, a projection 20e projects from a mounting surface with respect to the wall member, and is fitted into a hole 22a of the wall member and fixed to the heat sink by caulking. Thus, fluid leakage from cavities in a thin wall portion at a bottom of a bolt such as in the case of conventional bolting is prevented.
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Citations
8 Claims
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1. A cooling apparatus for an electric motor control unit comprising a heat sink (H) contacting a module (Um, Ug) of an electric motor control unit (U), a concave portion (20b) continuously formed in the heat sink, and a wall member (22) mounted on an opening face side of the concave portion so as to be fixed to the heat sink, which defines a coolant passage in the heat sink together with the concave portion of the heat sink, characterized in that
the heat sink includes a projection (20e) projecting from a mounting surface with respect to the wall member; -
the wall member includes a hole (22a) fitted into the projection; and
the wall member is fixed to the heat sink by caulking the projection of the heat sink. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification