Engineering Limiting the torque and safety torque elements

[Amaelle]

Homework Statement

Identify the elements of the safety clutches (look at the image)

Relevant Equations

safety clutches

Greetings
I need to identify the elements of the following safety cluches: we have three different clutches.
I lready identified most of them exept for number 14

Any help would be appreciated !
thank you!
1- output shaft
2-friction surface
3-preloaded spring
4-nut
5- input shaft

6- output shaft
7- input shaft
8-ogival seat
9-sphere
10-preloaded spring
11-nut
12-input shaft
13-output shaft
15-pin

 

[Amaelle]

is it a spline?

thank you!

 

[Lnewqban]

1 seems not to be a shaft.
15 has a special characteristic.
Could 12 and 13 be either?

How are 5 and 7 transferring power to their mechanisms?
It should be the same for 14.
No spline seems to be represented.

 

[Amaelle]

thank you
5 is the input shaft
1 is the output shaft
on 1 there is a friction disk mounted (not repesented) so there is a friction between the friction disk and the friction surface
the friction surface is connected to the input shaft through a housing which transfer power.for the the middle picture
the input shaft 7 is connected to the preolad spring and the sphere. there is a friction between the sphere and an the ogival seat. the ogival seat is on the output shaft, so this is how the torque is transmitted.

 

[Lnewqban]

thank you
5 is the input shaft
1 is the output shaft
on 1 there is a friction disk mounted (not repesented) so there is a friction between the friction disk and the friction surface
the friction surface is connected to the input shaft through a housing which transfer power.for the the middle picture
the input shaft 7 is connected to the preolad spring and the sphere. there is a friction between the sphere and an the ogival seat. the ogival seat is on the output shaft, so this is how the torque is transmitted.

No, no, before all that happens.
Why are splines needed?

 

[Amaelle]

I´m just guessing here,
maybe we need to connect the input shaft to another mechanisam and the spline gives a good way for it?

 

[Lnewqban]

Perfect!
The part inmediately connected to the shaft needs to have a way to avoid rotating respect to the shaft.
Sometimes, both must keep a specific angular position respect to each other.
Again, we don’t have a spline here.

 

[Amaelle]

so no idea about this strange line?

Perfect!
The part inmediately connected to the shaft needs to have a way to avoid rotating respect to the shaft.
Sometimes, both must keep a specific angular position respect to each other.
Again, we don’t have a spline here.

 

[Amaelle]

can this be a key slot?

 

[Lnewqban]

can this be a key slot?

Exactly!
The drawings show each two solid lines, which represent the three elements at once: key slot for the shaft, key itself and key slot for the part onto which the torque is transferred via the key.

Please, see:
https://en.m.wikipedia.org/wiki/Key_(engineering)

https://www.lovejoy-inc.com/resourc...r-transmission-shafts-have-both-keys-keyways/

 

[Amaelle]

thanks a million! was very rewarding discussing with you!

 

[Lnewqban]

Likewise, Amaelle.

 

[Lnewqban]