Set up as shown below. The RB accelerates through the gauntlet protecting the ball. The players with the hand shields should try to deliver a forward blow. Set up as shown below. Linebackers or other RB's can be used as pass rushers.
Emphasis is on proper angle of attack and exploding into the defender on initial contact.
This drill can also include situations where the pass rusher drops into coverage and the RB check releases. The drills for pass receiving and routes should the same as those you use for your receivers.