Need suggestions for new concept of rifle mechanism

[everydefense]

While viewed from above, the bolt and counter-bolt hypothetically balance each other linearly, assuming all the kinks/details are worked out, but consider that from the (left) side view in your drawing, the bolt and counter-bolt are both (more or less) "rotating" around the gear, counterclockwise, which could impart inertia/torque on the overall gun: down on the muzzle, up on the buttstock. That might not be the same as recoil, but could affect shootability/accuracy.

Instead, you could have the bolt and counter-bolt as concentric cylinders. The bolt would be standard, but the counter-bolt would be a larger diameter hollow cylinder, surrounding the bolt (not touching). That would keep all forces aligned axially. The main trick would be transferring the energy between the masses. Perhaps you could use a fluid (oil in a closed system, air might also work) that the bolt could compress, which would force the counter-bolt forward... I'm imagining something comparable to how a hydraulic system works. For that matter, as the illustration shows, you could even tune the hydraulic system to apply more (or less) pressure on the counter-bolt to optimize reciprocating masses in the system, making the weapon easier to lug around.

Definitely the trickiest part about any mechanical system with fluids under pressure like this is the seals, which would likely kill its usefulness beyond a range toy.

(This picture does not show a concentric system, but is just to help you visualize the hydraulics I mentioned.)

http://www.smithshydraulic.com/what-exactly-are-hydraulics/

It's been done. One of the French machine gun designs in the late 1890's.

Apparently it worked, it could sustain good rate of fire while keeping on target.
The problem is that reversing the thrust required a really REALLY heavy receiver
to keep it from cracking and breaking, which made the gun so heavy
the operators hated it in the field.

If I recall, the description said that most of them broke during action
at the very beginning of WW I and were left in the field, broken.

Metallurgy has improved a lot since the 1890s. Sounds like the receiver needed to be a tough, resilient (not necessarily super strong) steel with surface hardening. Who knows what kinds of impurities and defects they had in their steel back then, and if the metal was very brittle it could have quickly developed cracks under high impact.

WHAT ! it was done before I thought mine was original and thanks to all

It's always a good mental exercise to come up with new ideas, even if they don't pan out. I was proud of myself for conceptualizing a (simplified) continuously variable transmission (CVT) in junior high and was disappointed to find out that my "new" design was already in production in industry, lol. Just don't forget to take the necessary patent/trademark precautions if you DO come up with a novel idea someday- you'd hate to get your idea stolen by someone claiming to be the inventor

 

[CapnMac]

Instead, you could have the bolt and counter-bolt as concentric cylinders. The bolt would be standard, but the counter-bolt would be a larger diameter hollow cylinder, surrounding the bolt (not touching). That would keep all forces aligned axially.

Yeah, I had a poorly-formed thought about that way above.

"Float" the barrel inside another tube. Connect them with some studs on the barrel, and a helical groove on the sleeve. The sleve would then be indexed to the frame with anothe set of studs and helical grooves.
Barrel would go back, sleeve would go forward, frame backwards. The system would have a lot of friction loss from the need for mechanical slack. It would be frighteningly heavy, too, to be effective.

The motions ought to cancle each other out, some, but I'll wager there'd still be a ton of torque to suppress. Thought about a flywheel, but it would be hard to get one moving in the incredibly short amount of time the high energy impulse is available.

Which made me thin about a high spring rate clockwork spring--but, that's just adding breakable parts to the assembly for hiddly-piddly results.

 

[entropy]

Any major advancements in firearms will either be from changing the propellants, or eliminating the "fire" part entirely. The phased plasma rifle in the 40 watt range isn't here yet, but you can bet DARPA and many other such agencies are working on it 24/7.

 

[ved]

ok friends i'll look forward to it ,captain you're the best gunsmith and again thanks to ya all

 

[CapnMac]

No gun plumber I, just a half-donkey engineer with a bit of practical experience with things mechanical.

 

[Jim K]

"...recoil happens even before the slide/bolt begins to move."

Recoil begins when the projectile begins to move, and no sooner.

Jim

 

[Varminterror]

"...recoil happens even before the slide/bolt begins to move."

Recoil begins when the projectile begins to move, and no sooner.

Jim

And also no later.