Fastening structure of power unit

摘要

A hybrid transaxle 200 that is a transmission is provided with a junction surface 20 that contacts a junction surface of an internal combustion engine. A bolt span portion 20a of the junction surface 20 is provided with a protrusion portion 25 that elastically deforms so that the internal combustion engine-side junction surface and the hybrid transaxle 200-side junction surface 20 closely contact each other.

主权项

1. A fastening structure of a power unit formed by fastening an internal combustion engine and a transmission, comprising:
a first junction surface provided on the internal combustion engine; a second junction surface provided on the transmission; a plurality of bolts which are respectively inserted into a plurality of insertion holes that are formed in the first junction surface and second junction surface, and which integrally fasten the internal combustion engine and the transmission together while the first junction surface and the second junction surface are placed in contact with each other, wherein at least one of the first junction surface and the second junction surface includes a bolt span portion positioned between insertion holes, the bolt span portion located at a position of contact between the first junction surface and the second junction surface; and a protrusion portion provided in the bolt span portion, wherein the protrusion portion is integral with and protrudes from a part of the bolt span portion in a direction in which the internal combustion engine and the transmission are fastened, and the protrusion portion contacts the one of the first junction surface and the second junction surface that the protrusion portion faces, and wherein the junction surfaces have an offset from a straight line that connects two of the insertion holes that are positioned at opposite ends of the bolt span portion in which the protrusion portion is provided.