Variable shaft for hydraulic unit

Patent metadata

Field	Value
Publication number	US-2016146244-A1
Application number	US-201414551990-A
Country	US
Kind code	A1
Filing date	Nov 24, 2014
Priority date	Nov 24, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

A variable shaft of a hydraulic unit is provided including a body having a first end and a second opposite end. A first flange and a substantially identical second flange are integrally formed with the body of the shaft adjacent the second end. The first flange and the second flange each have an axial length parallel to a longitudinal axis of the body of about 0.085±0.010 inches (0.216±0.0254 cm). The first flange and the second flange have an outer diameter of 1.359 inches (3.452 cm). The first flange and the second flange are separated by from one another by a distance of about 0.3162 inches (0.8031 cm). A portion of the body between the first flange and the second flange has an outer diameter of about 1.2013 inches (3.051 cm).

First claim

What is claimed is:

1 . A variable shaft of a hydraulic unit, comprising:
a body having a first end and a second opposite end, a first flange and a substantially identical second flange integrally formed with the body of the shaft adjacent the second end, the first flange and the second flange each having an axial length parallel to a longitudinal axis of the body of about 0.085±0.010 inches (0.216±0.0254 cm), the first flange and the second flange having an outer diameter of 1.359 inches (3.452 cm), the first flange and the second flange being separated by from one another by a distance of about 0.3162 inches (0.8031 cm), wherein a portion of the body between the first flange and the second flange has an outer diameter of about 1.2013 inches (3.051 cm).

2 . The variable shaft according to claim 1 , wherein a relief is formed about a circumference of the body, a first portion of the body extending between the first end and the relief, a second portion of the body being arranged adjacent the relief, opposite the first portion, and a third portion of the body extending from adjacent the second flange towards the first end, wherein an outer diameter of the first portion is 0.6680+0.000−0.0005 inches (1.697+0.000−0.0013 cm), an outer diameter of the second portion is 0.703±0.010 inches (1.786±0.0254 cm), and an outer diameter of the third portion is about 0.810±0.010 inches (2.057±0.0254 cm).

3 . The variable shaft according to claim 2 , wherein a distance from the first end of the shaft to a first surface of the second flange is about 2.875±0.005 inches (7.303±0.0127 cm), the third portion of the shaft extends over an axial length from a second surface of the second flange of about 0.563±0.030 inches (1.430±0.0762 cm), and a distance from the first end of the shaft to a far end of the relief is about 0.380±0.010 inches (0.965±0.0254 cm).

4 . The variable shaft according to claim 3 , wherein the relief has an axial length of about 0.060 inches (0.1524 cm) and a thickness extending perpendicular to the longitudinal axis of about 0.010±0.005 inches (0.0254±0.0127 cm), the relief including an angle formed at a first end thereof and a radius formed at a second end thereof, the angle being about 45°±10° and the radius being about 0.010+0.010, −0.005 inches (0.0254+0.0254, −0.0127 cm).

5 . The variable shaft according to claim 4 , wherein a plurality of first splines are integrally formed with an exterior of the body between the second portion and the third portion, a first end of the first splines being located a distance of 1.522±0.010 inches (3.866±0.0254 cm) from a first surface of the second flange, and the plurality of first splines has an axial length of about 0.676±0.035 inches (1.717±0.089 cm).

6 . The variable shaft according to claim 5 , wherein the plurality of first splines are constructed in accordance with Table 1.

7 . The variable shaft according to claim 5 , wherein a through hole is formed in a portion of the body extending through the first splines, the through hole having a diameter of about 0.095±0.005 inches (0.2413±0.0127 cm) and being located at an axial distance of about 1.475 inches (3.747 cm) from the first end.

8 . The variable shaft according to claim 7 , wherein the body has a substantially hollow interior a first hollow portion adjacent the second end has an inner diameter of about 0.938±0.010 inches (2.383±0.0254 cm) and has an axial length extending from the second end of about 0.364±0.010 inches (0.925±0.0254 cm).

9 . The variable shaft according to claim 8 , wherein a second hollow portion adjacent the first hollow portion and aligned with the third portion, the plurality of first splines, and at least part of the second portion of the body has an inner diameter of about 0.517±0.010 inches (1.313±0.0254 cm).

10 . The variable shaft according to claim 9 , wherein a plurality of second splines are integrally formed with an interior surface of the body adjacent the first end, a third hollow portion being defined by the plurality of second splines, an end of the plurality of second splines being spaced from the second end of the shaft by an axial distance of 2.351±0.015 inches (5.972±0.038 cm).

11 . The variable shaft according to claim 10 , wherein the plurality of second splines are constructed in accordance with Table 2.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Campbell Kris H
• Lemmers Jr Glenn C
• Franklin Mark J

Classifications

• F05D2260/406

  through hydraulic systems · CPC title

• F02C7/32

  Arrangement, mounting, or driving, of auxiliaries · CPC title

• F16C19/26

  with a single row of rollers · CPC title

• F16C2360/23

  Gas turbine engines · CPC title

• F16H39/14

  with cylinders carried in rotary cylinder blocks or cylinder-bearing members · CPC title