What Are Common Assembly Flaws in Bevel Gearbox Designs?

[mech-14]

Hello! I need help in identifying flaws in this drawing. The torque in this bevel gearbox is being transferred from input shaft(1) to the bevel (2) and finally to the output shaft(3). The drawings has some errors in its assembly, functional error, or arrangement of bearings or sealings. Can you help me in identifying any flaws?

 

[Baluncore]

Welcome to PF.

A bevel gear will have a tapered face with the angle determined by the gear ratio. For a 1:1 ratio box it will be 45°.

There needs to be a thrust bearing on the output shaft. What type of bearing is installed there?

Is this homework?

 

[Baluncore]

@Lnewqban.
We do not know if this is homework yet.
Keep a few points for later.

 

[Lnewqban]

@Lnewqban.
We do not know if this is homework yet.
Keep a few points for later.

Oops!
Sorry, believed it was work, being on the Engineering forum.

 

[Baluncore]

@Lnewqban
Never mind, there are plenty of more obvious problems.

 

[jrmichler]

The drawings has some MANY errors in its assembly, functional error, or arrangement of bearings or sealings.

Think about:
What is the necessary geometry for a bevel gear pair.
Manufacturing tolerances.
Thermal expansion.
What adjustments are needed and why?
Assembly. Imagine a pile of loose parts, then putting them together one part at a time.
Do all fasteners have wrench access?
Bearings and bearing loads (radial, thrust, combined).

MTA: And it looks more like a final exam problem than a homework problem.

 

[Baluncore]

Draw a longitudinal section and measure the gear diameters.

 

[kamicaz]

View attachment 263192

Hello! I need help in identifying flaws in this drawing. The torque in this bevel gearbox is being transferred from input shaft(1) to the bevel (2) and finally to the output shaft(3). The drawings has some errors in its assembly, functional error, or arrangement of bearings or sealings. Can you help me in identifying any flaws?

There is lot of error

1- at the lower left bearing is impossible for assembly you need to change diameter of the axle on the left side of the bc type bearing (or one row bearing) lower diameter same size of the inner ring of the bearing
2- at lower left side at the exit you need to remove the slut or move it to the left side outside the cover otherwise you cannot install the left side cover
3 at lower left the cover doesn’t need to hold the one row bearing since we have double row bearing at the right its already blocked from movement
You need to leave the one row bearing free (the outer ring )3- now at the lower right the bever gear at lower side will contact (or touch)the outer box you need to extend it ..

4 - at the lower right side the slut is touching the double row bearing
You need to make the slut just little be shorter

5 -the contact between the gears you need to add vertical line at the bever gear (the gape were the teeth are meshing )Note I don’t understand what type of gears are used
If they are (hypoid gears or bever gears)
In drawing look like spur gear with bever gear which is wrong they cannot mesh together

And there is lot more error

 

[berkeman]

There is lot of error

1- at the lower left bearing is impossible for assembly you need to change diameter of the axle on the left side of the bc type bearing (or one row bearing) lower diameter same size of the inner ring of the bearing

Welcome to PF.

Please keep in mind that we do not do a student's homework for them. We give hints, ask probing questions, find errors in their work, but the student must do the bulk of thye work.

Having said that, this thread is 2 years old and the OP is long gone. In cases like that, it is generally okay to post solutions. This old thread is now closed.