Rotary actuation mechanism

Patent metadata

Field	Value
Publication number	US-10215301-B2
Application number	US-201715622331-A
Country	US
Kind code	B2
Filing date	Jun 14, 2017
Priority date	Jun 14, 2016
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

An actuation mechanism for a rotary element, comprises an electric drive motor coupled to a threaded drive spindle. A threaded drive nut is received on said drive spindle for movement along said drive spindle. A rack gear is coupled to said drive nut. A pinion gear is drivingly engaged with said rack gear and drivingly couplable to the rotary element. The rotary element may be a valve element.

First claim

The invention claimed is:

1. A rotary valve assembly comprising:
a valve element rotatably mountable within a flow passage for rotary motion between an open position in which it permits flow through the flow passage and a closed position in which it blocks flow through the flow passage;
a valve housing comprising a duct portion receiving said valve element and an actuation portion receiving an actuation mechanism; and
said actuation mechanism including:
an electric drive motor coupled to a threaded drive spindle;
a threaded drive nut received on said drive spindle for movement along said drive spindle;
a rack gear coupled to said drive nut; and
a pinion gear drivingly engaged with said rack gear and drivingly couplable to said rotary element;

wherein said actuation portion comprises an overhanging portion that laterally overhangs over a side of said duct portion, said drive motor being at least partially arranged in said overhanging portion, wherein the drive spindle is arranged parallel to a longitudinal direction of the flow passage
an anti-rotation element operatively cooperating with said drive nut to prevent said drive nut rotating on said drive spindle; and
the anti-rotation element comprises a shaft extending parallel to said drive spindle, said drive nut comprising a collar which is slidably received on said shaft.

2. A rotary valve assembly as claimed in claim 1 , wherein distal ends of said drive spindle and said shaft are supported in a common support.

3. A rotary valve assembly as claimed in claim 1 , wherein said pinion gear projects over said shaft.

4. A rotary valve assembly as claimed in claim 1 , wherein said pinion gear extends over an angle of less than 360°.

5. A rotary valve assembly as claimed in claim 4 , wherein said pinion gear is a quadrant gear.

6. A rotary valve assembly as claimed in claim 1 , wherein said valve element comprises a disc.

7. A rotary valve assembly as claimed in claim 1 , wherein said actuator portion is integral with said duct portion.

8. A rotary valve assembly as claimed in claim 1 , further comprising a cover removably closing said actuation portion.

9. A rotary valve assembly as claimed in claim 8 , wherein said cover comprises an electrical connector for connection of a power supply to said electric drive motor.

10. A rotary valve assembly as claimed in claim 1 wherein said duct portion comprises mounting flanges at opposed ends thereof.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Kwasniewski Pawel

Classifications

• F16K31/54

  with pinion and rack · CPC title

• F16H2025/204

  Axial sliding means, i.e. for rotary support and axial guiding of nut or screw shaft · CPC title

• F16H19/04

  comprising a rack · CPC title

• F16H25/20

  Screw mechanisms (with automatic reversal F16H25/12) · CPC title

• F16K1/221

  specially adapted operating means therefor (operating means per se F16K31/00) · CPC title