Switching to drummode and back

[Sven Hillebrand]

Hi Everybody,
I'm currently transcribing a Leadsheet for my Jazz Combo and the 
original contains  four bars with drumnotes. When I insert the notes via 
\drummode it just prints normal notes on the center line:

\version "2.18.2"
{
   \repeat unfold 8 {e''8}
   \drummode { \clef percussion
  hh4. r4. hh4.  }
   \clef bass d1
}

Is there a way to make it look like the original in the attachment?

Thank you very much

Sven

Leadsheet_with_drums.jpg
Description: JPEG image