Damper device

Patent metadata

Field	Value
Publication number	US-10260793-B2
Application number	US-201515307001-A
Country	US
Kind code	B2
Filing date	Apr 22, 2015
Priority date	Apr 30, 2014
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A damper apparatus possible to suppress abnormal sounds immediately after the locking of gears has been released is provided. In a first lock mechanism of the damper apparatus, a first arcuate outer-peripheral part peripherally adjacent to a teeth-missing gear in a drive gear enters a portion of a plurality of teeth in which some teeth are narrowed in the axial direction to restrain a sector gear, the teeth being meshed with the drive gear in the sector gear. In the tooth nearest to the first arcuate outer-peripheral part in the teeth-missing gear, the curvature of a first tooth flank on the side opposite the first arcuate outer-peripheral part is less than the curvature of a second tooth flank on the first arcuate outer peripheral part side, and the tooth has a curved surface continuous from the first tooth flank to the second tooth flank.

First claim

The invention claimed is:

1. A damper device comprising:
a frame in which an opening part is formed;
a baffle configured to open and close the opening part;
a drive mechanism structured to drive the baffle; and
a case which accommodates the drive mechanism;
wherein the drive mechanism comprises a stepping motor and a gear train structured to transmit rotation of the stepping motor;
wherein the gear train comprises a drive gear and a sector gear engaged with the drive gear and driven by the drive gear;
wherein a first lock mechanism is structured between the drive gear and the sector gear at a movement restricted position in one of a closing direction and an open direction of the baffle, and the first lock mechanism prevents turning of the sector gear to the other of the closing direction and the open direction of the baffle;
wherein the first lock mechanism is structured so that a first circular arc-shaped outer peripheral part of the drive gear concentrically formed so as to have the same or larger diameter than a tooth tip circle of a partially toothless gear engaged with the sector gear and disposed at a position adjacent in a circumferential direction to the partially toothless gear is entered into a portion of a tooth whose dimension in an axial line direction is narrowed of a plurality of teeth of the sector gear engaged with the drive gear and thereby the sector gear is restricted; and
wherein a tooth on a most first circular arc-shaped outer peripheral part side of the partially toothless gear is formed so that a curvature of a first tooth face on an opposite side to a first circular arc-shaped outer peripheral part side is smaller than a curvature of a second tooth face on the first circular arc-shaped outer peripheral part side.

2. The damper device according to claim 1 , wherein a tooth face of the tooth on the most first circular arc-shaped outer peripheral part side of the partially toothless gear is formed in a continuously curved face from a side of the first tooth face to the second tooth face.

3. The damper device according to claim 2 , wherein the tooth face of the tooth on the most first circular arc-shaped outer peripheral part side of the partially toothless gear is formed in a continuously curved face from the side of the first tooth face to the first circular arc-shaped outer peripheral part.

4. The damper device according to claim 3 , wherein the first lock mechanism prevents turning of the sector gear at the movement restricted position in the closing direction of the baffle.

5. The damper device according to claim 4 , wherein
a portion of the baffle contacting with the frame when the baffle sets the opening part in a closed state is made of an elastic member, and
the elastic member is elastically deformed by contacting with the frame in a state that the opening part is closed by the baffle.

6. The damper device according to claim 5 , wherein
a first stopper mechanism is structured between the drive gear and the case and the first stopper mechanism restricts a movable range in a first turning direction of the drive gear when the baffle is turned in the closing direction, and
the first lock mechanism is structured so that a dimension in an axial line direction of a tooth at the most end position in a circumferential direction of the plurality of the teeth of the sector gear engaged with the drive gear is narrowed.

7. The damper device according to claim 6 , further comprising a second stopper mechanism which restricts a movable range in a second turning direction of the drive gear when the baffle is turned in the open direction,
wherein the movable range of the baffle set in a range from a position where the first stopper mechanism is operated to a front position before the second stopper mechanism is operated.

8. The damper device according to claim 7 , wherein
a bottom plate part of the case is formed with a stopper protruded part,
the drive gear is formed with a protruded part, and
the first stopper mechanism and the second stopper mechanism are structured of the stopper protruded part and the protruded part.

9. The damper device according to claim 7 , wherein
a second lock mechanism is structured between the drive gear and the sector gear for holding the sector gear in a stopped state at the front position, and
the second lock mechanism is structured so that a second circular arc-shaped outer peripheral part of the drive gear concentrically formed so as to have the same or larger diameter than the tooth tip circle of the partially toothless gear engaged with the sector gear and disposed at a position adjacent in the circumferential direction to the partially toothless gear is entered into a portion of a tooth whose dimension in an axial line direction is narrowed of the plurality of the teeth of the sector gear engaged with the drive gear and thereby the sector gear is restricted.

10. The damper device according to claim 9 , wherein
the drive gear is formed with a circular arc-shaped protruded part lower than a dimension in the axial line direction of the partially toothless gear on an opposite side to the partially toothless gear,
the circular arc-shaped protruded part is connected from the first circular arc-shaped outer peripheral part to the second circular arc-shaped outer peripheral part, and
an outer peripheral face of the circular arc-shaped protruded part is provided with the same or larger diameter than the tooth tip circle of the partially toothless gear and formed concentrically with the tooth tip circle.

11. The damper device according to claim 1 , wherein the sector gear is an output gear connected with the baffle.

12. The damper device according to claim 1 , wherein an imaginary line which connects a turning center position of the drive gear and a turning center position of he sector gear is obliquely extended for all of four side plate parts of the case which surround the drive mechanism.

13. The damper device according to claim 1 , wherein a pitch circle radius of a large diameter gear of a first gear engaged with a motor pinion of the stepping motor is set so that a length obtained by adding a pitch circle radius of the motor pinion to the pitch circle radius of the large diameter gear of the first gear is larger than a length obtained by adding a radius of the stepping motor and a pitch circle radius of a small diameter gear of the first gear.

14. The damper device according to claim 1 , wherein the first lock mechanism prevents turning of the sector gear at the movement restricted position in the closing direction of the baffle.

15. The damper device according to claim 14 , wherein
a portion of the baffle contacting with the frame when the baffle sets the opening part in a closed state is made of an elastic member, and
the elastic member is elastically deformed by contacting with the frame in a state that the opening part is closed by the baffle.

16. The damper device according to claim 15 , wherein
a first stopper mechanism is structured between the drive gear and the case and the first stopper mechanism restricts a movable range in a first turning direction of the drive gear when the baffle is turned in the closing direction, and
the first lock mechanism is structured so that a dimension in an axial line direction of a tooth at the most end position in a circumferential direction of the plurality of the teeth of the sector gear engaged with the drive gear is narrowed.

17. The damper device according to claim 16 , further comprising a second stopper mechanism which restricts a movable range in a s

Assignees

• Nidec Sankyo Corp

Inventors

• Saito Shunji
• Hayashi Katsuhiko

Classifications

• F16H1/06

  with parallel axes · CPC title

• F16K31/53

  with toothed gearing · CPC title

• F16K31/04

  using a motor · CPC title

• F16H27/08

  with driving toothed gears with interrupted toothing · CPC title

• F16H55/08

  Profiling · CPC title