The Rake is a Farm Rake. Not that little Rake you can get at Home depot. More like a bunch of three feet long baling hooks. One Rake was a log with wooden spikes all over it.
In the Monkey King stories, Pig uses a Rake. Because of this Legendary referance, the Rake tends to be a higher level weapon with very advanced concepts attributed to it. At the lower levels, the Rake is like hitting people with a bag full of knives.