Drive hub for planet pinion carrier freeness check

1. An assembly, comprising:

a sun gear including external gear teeth and internal axial spline teeth;

a drive hub including a first body having radial holes and a second body having a chamfer at an axial end;

inserts, each including a sleeve in one of the holes and secured to the first body, a plunger located in the sleeve, and a spring urging the plunger radially outward toward engagement with the spline teeth.

2. The assembly of claim 1 , wherein:

each of the holes includes an internal screw thread; and

each of the inserts includes an external screw thread engaged with one of the internal screw threads.

3. The assembly of claim 1 , wherein:

the second body is a cylinder extending from the first body, which is a cylinder, and the chamfer extends around an entire circumference of the second body.

4. The assembly of claim 1 including a third body extending from the first body and including a lateral hole configured to be engaged for driving the drive hub, with the plungers in turn driving the sun gear.

5. The assembly of claim 1 , wherein each of the plungers includes a convex spherical surface at a radial outer end.

6. The assembly of claim 1 , wherein:

the sun gear further includes a second chamfer located at axial end of the spline teeth; and

the chamfer of the second body pilots the drive hub axially into the spline teeth.

7. An assembly, comprising:

a drive hub including a first body formed with radial holes and a second body extending from the first body and including a chamfer located at an axial end of the second body;

inserts, each including a sleeve in one of the holes and secured to the first body, a plunger located in the sleeve for displacement along the sleeve, and a spring urging the plunger radially outward; with each plunger including a convex spherical surface at a radially outer end.

8. The assembly of claim 7 , wherein:

each of the holes includes an internal screw thread; and

each of the inserts includes an external screw thread engaged with one of the internal screw threads.

9. The assembly of claim 7 wherein the first and second bodies each have the form of a right circular cylinder.

10. The assembly of claim 7 , wherein the second body is cylindrical and extends axially from the first body, which is cylindrical and has a diameter greater than the second body, and a cylindrical third body extending from the first body in an opposite direction from the second body and having a diameter less than the first body.

11. An assembly, comprising:

a gear including external gear teeth and internal spline teeth;

a drive hub including a cylindrical first body, a cylindrical second body extending axially from the first body and having a diameter less than the first body, and a cylindrical third body extending from the first body in an opposite direction from the second body and having a diameter less than the first body, the first body having radial holes;

plungers, each extending radially from a respective one of the holes, and springs, each urging one of the plungers radially outward into engagement with the spline teeth.

12. The assembly of claim 11 , wherein the second body has a chamfer at an end opposite from the first body.

13. The assembly of claim 11 , wherein the gear includes a chamfer at an axial end of the spline teeth, and the second body has a chamfer at an end opposite from the first body for piloting the drive hub axially into the spline teeth.

14. The assembly of claim 11 , wherein each of the plungers includes a convex spherical surface at a radially outer end, the spherical surfaces in contact with the spline teeth.

15. The assembly of claim 14 , wherein the gear includes a chamfer at an axial end of the spline teeth, and the second body has a chamfer at an end opposite from the first body for piloting the drive hub axially into the spline teeth.