| 摘要 |
PURPOSE:To largely improve load bearing ability of a through-bolt to heat exchanger units, by disposing a collar in the position confronting the flange of a through-bolt to accumulate heat exchanger units, in a heat exchanger for a car in which engine oil exchanges heat for cooling water. CONSTITUTION:A heating exchanger 9 is composed of the primary and the secondary plates 4 and 5 which are connected at both ends. The primary plate 4 and the secondary plate 5 respectively has a through-hole 6, a communicating hole 7 and a flow inlet hole 8 in the confronting position. When a number of heat exchanger units 9 are accumulated, these holes are respectively connected to another to form a through passage 10, a communicating passage 11 and a flow inlet passage 12. A collar 38 in the shape of a letter C is interposed in the position confronting the through-holes 6. Oil being fed into the units 9 through the flow inlet passage 8 flow into the through passage 10, after flowing along the outer periphery of a collar 38. Further, a through-bolt 31 having a flange part 52 is fitted in a through-hole 14 in such a manner that the flange part 52 is located in the position confronting the collar 38.
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