Hydraulic unit

Patent metadata

Field	Value
Publication number	US-10228013-B2
Application number	US-201615287198-A
Country	US
Kind code	B2
Filing date	Oct 6, 2016
Priority date	Nov 24, 2014
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

A hydraulic unit includes a housing, a pump located in the housing, and a motor located in the housing and operably connected to the pump such that the motor is driven in response to fluid pressure delivered to the motor from the pump. An output shaft is operably connected to and driven by the motor and includes a body having a first end and a second opposite end, and a first flange and a substantially identical second flange integrally formed with the body of the shaft adjacent the second end. A relief is formed about a circumference of the body. A plurality of first splines are integrally formed with an exterior of the body between the second portion and the third portion, and a plurality of second splines are integrally formed with an interior surface of the body adjacent the second end.

First claim

What is claimed is:

1. A hydraulic unit, comprising:
a housing;
a pump disposed in the housing;
a motor disposed in the housing and operably connected to the pump such that the motor is driven in response to fluid pressure delivered to the motor from the pump;
an output shaft operably connected to and driven by the motor, including:
a body having a first end and a second opposite end; and

a first flange and a substantially identical second flange integrally formed with the body of the shaft adjacent the second end, the second end of the body having an outer diameter of 0.990±0.005 inches (2.515±0127 cm), 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);
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; and

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);
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 located a distance of 1.269±0.010 inches (3.223±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);
wherein the body has a substantially hollow interior and an inner diameter of the hollow interior adjacent the first portion, the second portion, the plurality of first splines, and the third portion of the body is about 0.517±0.010 inches (1.313±0.0254 cm); and

wherein a plurality of second splines are integrally formed with an interior surface of the body adjacent the second end, a first portion of the hollow interior being defined by the plurality of second splines such that the first portion of the hollow interior has an inner diameter of about 0.760±0.010 inches (1.930±0.0254 cm).

2. The hydraulic unit according to claim 1 , wherein a distance from the first end of the shaft to a first surface of the second flange is about 2.622±0.005 inches (6.660±0.0127 cm), the third portion of the shaft extends over an axial length from a second surface of the second flange of about 0.250±0.030 inches (0.635±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).

3. The hydraulic unit according to claim 1 , 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).

4. The hydraulic unit according to claim 1 , 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.

5. The fixed shaft according to claim 4 , wherein a second portion of the hollow interior, substantially aligned with the spacing between the first flange and the second flange has an inner diameter of 0.900±0.010 inches (2.286±0.0254 cm) and an axial length of about 0.125±0.015 inches (0.3175±0.038 cm).

Assignees

• Hamilton Sundstrand Corp
• Hamilton Sundstand Corp

Inventors

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

Classifications

• F04B1/20

  having rotary cylinder block · CPC title

• F16H39/14

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

• F01B3/00

  Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis · CPC title

• F16C33/581

  integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels · CPC title

• F16C3/02 Primary

  Shafts; Axles · CPC title