Wood Gear Ratchet 

You're so welcome! Thanks for watching. Please subscribe! That is what keeps this channel going. Ron

What if the axle isn't symmetrical? What then huh?

some bicycles use wedged rollers (aka one way bearings), but same idea, except you have rollers that wedge against the housing in one way, and don't in the other way. but most have a ratchet system, though it is inverted, the pawls are on the inside and the ratchet on the outside.

Just about it is called a "Sprag" gear or clutch.

in this configuration it should be much stronger though

A safety pin is an excellent idea!

Thank you for your kind comment. Have a look around my channel. You will probably find other subjects of interest. Thanks for watching. Please subscribe! That is what keeps this channel going. Ron

Nearly four years ago... time flies. Actually, I made both clutches for a project I was working on and then got sidetracked building organs and other stuff. So that particular project remains "in progress". The first one I made was the One Way Dog Clutch, which is more difficult to make (I think). The Wood Gear Ratchet is smoother as it does not take as much torque to operate.The springs in the One Way Dog Clutch were from ink pens. The same springs could probably be used in the Wood Gear Ratchet as well... pushing on the pawls. Thanks for watching. Please Subscribe! Ron

Thanks for the quick response Ron! Just subscribed...I am sure I'll be in touch again during my build. Thanks, Mike

i was thinking the same thing. i think this is very cool stuff, and it inspires the imagination!

You can if the axle is the same in both directions, in application that might not be the case tho.

Glad you enjoyed it! Thanks for watching. Ron

Thank you. That is very much appreciated! Please subscribe! You should find other projects of interest on my channel. Ron

Glad you like it. Thanks for watching. Please subscribe! That is what keeps this channel running. Ron

Glad you liked it. I have a number of wood projects on my channel that you would also like. Thanks for watching. Please subscribe. Ron

@@RonaldWalters2010 Just did. Great stuff!

Thank you. Please check out the rest of my channel! Ron

You are welcome. Glad you enjoyed it. Thanks for watching. Please subscribe! That is what keeps this channel running. Ron

MAMODMAN95 I have no plans for that at this time.

At 3:04 the application is clearly explained. A spring would be attached to the back of the mechanism. A small gear would drive the large gear to wind the spring. Then the spring would drive the axle. Thanks for watching. Please subscribe. That is what keeps this channel running. Ron

Being made of wood and the pawls small, the intent is to spread the load evenly between two pawls. If I wanted (or needed) more positions of engagement I would put more teeth on the ratchet while maintaining simultaneous engagement of the two pawls. This also helps keep the mechanism balanced on the axle and it is less likely to wrack or twist. Thanks for watching.

If you spun it fast enough in reverse, centrifugal force would carry the pawls away from the teeth. Playing with weighted pawls would vary how fast it would need to spin to accomplish this. Perhaps a better option would be a one-way sprag or trapped roller clutch. Google it. There are many examples on RU-vid. Also thang10146 on RU-vid and 507movements.com have many animated mechanisms.

+Shirantadka Rajashekhar Don't know if I can help you but go ahead and ask.

Thanks Ronald. Basically, I want to use this as my main mechanism to convert an from an oscillating swing motion, to a unidirectional rotatory motion. Since, kids might not swing at insane revs, I might have to use a step down to increase the revs - so that an electro magnet can generate electricity. I just wanted to get some of your experience in figuring out all the mechanisms needed for this project.

+Shirantadka Rajashekhar Look at: Mechanical Movements Powers And Devides knowledgepublications.com/history/mechanical_movements_detail.htm You might consider these movements - about half way down the page:ALTERNATE RECTILINEAR MOTION FROM A SWINGING LEVER WITH SECTOR AND RACKRECIPROCATING RECTILINEAR MOTION OF A DOUBLE RACK Also watch my video: Making Movement 123 -Reciprocating Rack Mechanismru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Cas_tOSgz8Y.html A lot of these movements look feasible in theory but they can be very tedious to get to work reliably. Your “swing” would need solid suspension rods (not chain or rope) and the force of keeping the mechanism running is continuously trying to stop the swing or make it swing unstable. I suspect you will want something that spins a flywheel (generator) in both directions of the swinging motion. People are constantly trying to get me to help them build or invent something. Sorry, I just do not have the time. Good luck with your project.

Thanks Ronald. Appreciate the help

How did it work out?

No, a ratcheting clutch only works in one direction. If it ratcheted in both directions it would not be able to drive anything. This can be made to ratchet in either direction (but not both directions at the same time) I also have a video on making a dog clutch. One-Way Ratcheting Dog Clutch ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TpQpAXu4wOg.html Thanks for watching. Please Subscribe. That is what keeps this channel running. Ron

MAMODMAN95 One end of the spring would be attached to the large gear hub and the other end attached to the frame of the mechanism. The frame would also contain the bearing supports for the driven axle. This would work like any wind up mechanism, toy or clock.

Jackson Robinson Torsion Coil Spring made from very small gauge piano wire. I salvaged these from an old printer I scrapped out (this is why I keep a junk parts box). It does not require much of a spring to make this mechanism work. Look around on eBay or try winding some yourself.

Ronald Walters is it strong?

David English Strong enough for a wood gear mechanism.

Ronald Walters i made a wood catapult and its pretty hard to pull it back so i want to make a which and i was wondering if this would work?

David English Not knowing the scale of what we are talking about, I am at somewhat of a disadvantage. The weakness of my mechanism is the pawl support pin. I have two paws so each one takes half the load. Four pawls would take one quarter of the load. Or google "catapult ratchet" to see what others have built. Winching it is one thing... firing it another... and the wear of the ratcheting mechanism.

It's called left hand or right hand as you find necessary for a permanent installation, like a left hand or right hand thread, a left hand or right hand glove, a left hand or right hand pistol... comprende?

Haha, yes, I know....couldn't think of the term....it was late and my brain was tired. Your sprocket assembly appears to be SYMMETRICAL, which means you can install it either way, negating the need to reverse the internal parts. Comprende??

Ray Kent---haha! thanks for the validation ;) Ronald didn't believe me!

The point of reversing the interior components is so that you can change the position of the access cover depending on where and how the gear is installed. If you turn the whole assembly around the the access cover may get buried against the wall of the assembly. It isn't important 100% of the time but there are cases where you may want to leave the gear installed and only remove the cover to replace the springs, the pawls, or the ratcheting gear. Of course he could make both sides removable instead of having one side fixed, and then just turn the gear around without even having to consider that, but then it would be more complicated to secure the posts that the pawls are mounted on. In fact.. no it's much more complicated repair wise to not have one side fixed. It's better to have an access plate and to have that access plate... accessible.

Sorry for the delayed answer. RU-vid is mixing up the messages and I missed it. No plans or sizes for this one. You just work out the ratios for your particular project

As small as you need it to be, but different materials are needed, wood can only go so far.

Sorry, I do not have any drawings nor notes for this build. Just use my video as a guideline. Ron

@@RonaldWalters2010 okay, no problem. Thank you 😊

There is no other (quieter) noise. Try watching it again. Occasionally the audio will get offset when playing a video on the internet... not usually but sometimes. Thanks for watching. Ron

+Harry Huang Sorry, the plan is not available. But I show you how to draw your own in the video and you can use the gear template generator on woodgears.ca

Ronald Walters I have this generator but I don't know the parameter.

+Harry Huang I did not keep notes on this project. You can see in the video the large gear printed on paper. The squares are 1" and the gear is 9" which is too large for a single sheet of our standard paper size which is 8.5" x 11" so it ends up being printed on two sheets of paper. The ratchet was derived from a 3" diameter 12 tooth gear. With a magnifying glass you can see in upper left hand corner the large gear has 44 teeth and is standard 20 degree contact angle which is what the gear template generator starts with. The shaft is 1/2" dowel. The rest is up to your experimentation and development.

The video shows you how I developed the ratchet using a gear template. The size of your ratchet would be determined by you for your project. I used no drawings other than the templates shown.

Or forwoods and not backward. :-) Thanks for watching! Ron

@@RonaldWalters2010 🤣🤣🤣 'course forwoods

No, sorry. I am just showing you how to make your own.

@@RonaldWalters2010 thank you that helps a lot!

Thank you! Please subscribe! That is what keeps this channel going. Ron