help device implementation

[Micius88]

hello to all... is there anyone who could give me tips on how to make a device like that represented schematically in the annex? ?
must be complete with all components such as spacers, washers, bearing housings....
Thank you.

 

[sampom]

hello to all... is there anyone who could give me tips on how to make a device like that represented schematically in the annex? ?
must be complete with all components such as spacers, washers, bearing housings....
Thank you.

Here.
. But what is not clear to you? because the pattern that places is sufficiently explanatory and complete with everything (both, lack the lengths of the trees with the axial positions of the bearings, but those will be at your "discretion" and irrelevant for the purposes of operation).

It is simply two parallel trees with two toothed wheels, and two handles joined by a biella.
try to throw down a "crash" with the dimensions, you will notice that that device transforms the circular/continuous motion of the primary tree to in oscillatory motion/pink to the shaft b. bringing everything back to the exit on the dentate wheels you will have realized a "reducer / oscillator" craft:smile: (see colombo and filippetti et simili, although those are mostly cams).

you just have to proceed to the modeling of the trees, the cranks and the biella and the "box" that will support everything. you have all kinds of used bearings (find all in skf.it) so you don't even have to make calculations for size (as well as the forces in play are not specified, so it is a pure design exercise and for lengths you can go "to pleasure").

if you have to do everything with solidworks of course you will need to know at least the basics of cad 3d (but first of all technical design and technology).. Is this the problem?

greetings
Marco:smile:

p.s. as new user to the first message is good standard to read the regulation (http://www.cad3d.it/forum1/showthread.php?t=13677) and then proceed to a brief presentation.

 

[marcof]

you will notice that that device transforms the circular/continuous motion of the primary tree into oscillatory/pink motion to the tree b.

I thought that the circular motion of the tree was simply transferred to the tree b through the biella-handle link.

 

[reggio]

I thought that the circular motion of the tree was simply transferred to the tree b through the biella-handle link.

Perhaps because the scheme shows two equal handles, in relativity the odds are different.

 

[Micius88]

the truth is that I am not very hard on the topic and therefore I find myself in difficulty for example in making the elements related to the bearings (supports, elements to bind them as wreaths and rings).
Could you tell me a possible solution for my problem? Thank you very much

 

[stefanobruno]

I thought that the circular motion of the tree was simply transferred to the tree b through the biella-handle link.

You're kidding, right?

 

[Mike1967]

You're kidding, right?

but also I interpret that cranks are connected by snodes and bar
threaded... No?

 

[stefanobruno]

but also I interpret that cranks are connected by snodes and bar
threaded... No?

Of course they are connected as you say but, from a rotating hand crank connected to another crank with a tie, you will never be able to have a regular motion transmission.
As soon as the uncertainty of the movement arrives at the dead point, it becomes absolute.
Moreover the speed is for a moment nothing, so you can't even put a flywheel that helps you overcome the stall.
the only possible movement is the oscillating one, in fact the two handles of the theme have different arm, a continuous wheel (the one at the left) and the other goes forward and indrè.
one has the bearings because it rotates continuously and the other the bushings, more indicated for the alternating movement with smaller corners of the turn angle.

Bye.

 

[Er Presidente]

I sell squid used as new!
avoid perditempo.

:biggrin:

 

[Mike1967]

Of course they are connected as you say but, from a rotating hand crank connected to another crank with a tie, you will never be able to have a regular motion transmission.
As soon as the uncertainty of the movement arrives at the dead point, it becomes absolute.
Moreover the speed is for a moment nothing, so you can't even put a flywheel that helps you overcome the stall.
the only possible movement is the oscillating one, in fact the two handles of the theme have different arm, a continuous wheel (the one at the left) and the other goes forward and indrè.
one has the bearings because it rotates continuously and the other the bushings, more indicated for the alternating movement with smaller corners of the turn angle.

Bye.

provided that I do not have an appropriate degree of study, I am to what is deduced from the annex pdf:

75 mm leverage tree rotates, while the leverage tree
from 175 mm has an oscillating motion, I see nothing strange.
in the text is not contemplated the type of movement.
the toothed wheels, among other things, do not come into contact (if I did not miss the calculations)
The wheels are independent. one wheel, the other swings.

 

[MBT]

I sell sciacciasassi used as new!
avoid perditempo.

:biggrin:

I buy it.

 

[Mike1967]

I'm definitely wrong.. .

 

[Mike1967]

I buy it.

6 ot.........:biggrin:
http://www.youtube.com/watch?v=yljjvfr2olu

 

[stefanobruno]

I'm definitely wrong.. .

look that my observation was not related to what you said but to this below

I thought that the circular motion of the tree was simply transferred to the tree b through the biella-handle link.

Let's go back to the subject, I saw the footage and that's exactly what micius88 has to do.

Hi.

 

[sampom]

75 mm leverage tree rotates, while the leverage tree
from 175 mm has an oscillating motion, I see nothing strange.
in the text is not contemplated the type of movement.
the toothed wheels, among other things, do not come into contact (if I did not miss the calculations)
The wheels are independent. one wheel, the other swings.

And then you see that you understood right? :finger:

at the exit of the "box" you will have two motorcycle solutions; to one wheel the continuous rotation and to the other an oscillatory / almond (forwards and back:biggrin.
just like certain intermittents/commercial oscillators.

greetings
Marco:smile:

This is nothing to do with "study title." once "read" the design (even only that quoted pattern) the device is solved (as you have shown). :biggrin:

 

[Micius88]

Can someone tell me how to bind the 4 bearings on the 2 trees?

 

[cacciatorino]

Can someone tell me how to bind the 4 bearings on the 2 trees?

you could buy a mechanical drawing book of theitis, usually these topics are treated very well and extensively.

Anyway, I'd like to tell you, since you're a student, to put down a solution and propose it on the forum, and then you'll see that you'll be given advice on how to improve it and make it acceptable. the best way to become a good technician is to learn from their mistakes thanks to the comparison with experienced technicians, instead copying the solutions proposed by others is a work not useful in future.

 

[marcof]

I thought that the circular motion of the tree was simply transferred to the tree b through the biella-handle link.

You're kidding, right?

Of course not! I looked at the pattern and the one on the fly I thought. :redface:

And then, if I take something out, I'm not gonna throw myself back and I'm going to make some crazy excuses. Who did you get me for? :smile:

 

[marcof]

I sell sciacciasassi used as new!
avoid perditempo.

:biggrin:

:hahahah::hahahah:
mi fai schiantare!

 

[marcof]

I sell sciacciasassi used as new!
avoid perditempo.

:biggrin:

I buy it.

I sell it!
If you want you can buy his oak drummer as President, the one with the wheels in the hubs of the wheels, so much so now he no longer rises from the fighting wheelchair, and the rosters also has them in that... :biggrin: