Final drive disconnect mechanism

Patent metadata

Field	Value
Publication number	US-9726227-B2
Application number	US-201514711256-A
Country	US
Kind code	B2
Filing date	May 13, 2015
Priority date	Mar 13, 2013
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

The present disclosure provides a disconnect mechanism for removably coupling an input member and an output member to one another. The mechanism includes a drive member configured to be rotationally driven and a driven member rotationally coupled to the drive member. A collar is rotatably coupled to the driven member, where rotation of the drive member induces rotational and longitudinal movement of the collar along a shaft passing through the driven member. The mechanism further includes a coupler member coupled to the collar such that the coupler member is adapted to be removably coupled to the input member and output member. As the collar moves along the longitudinal shaft, the coupler member moves longitudinally between a first position in which the input member and output member are coupled and a second position in which the input member and output member are decoupled from one another.

First claim

What is claimed is:

1. A disconnect mechanism for removably coupling an input member and an output member to one another, comprising:
a drive member configured to be rotationally driven;
a driven member rotationally coupled to the drive member;
a collar rotatably coupled to the driven member, where rotation of the drive member induces rotational and longitudinal movement of the collar along a longitudinal shaft, wherein the longitudinal shaft extends through the collar and is fixed longitudinally and rotationally with respect to the drive member; and
a coupler member coupled to the collar, the coupler member adapted to removably couple the input member to the output member;
wherein, as the collar moves longitudinally along the longitudinal shaft, the coupler member moves longitudinally between a first position in which the input member and output member are coupled and a second position in which the input member and output member are decoupled from one another.

2. A disconnect mechanism for removably coupling an input member and an output member to one another, comprising:
a drive member configured to be rotationally driven;
a driven member rotationally coupled to the drive member;
a collar rotatably coupled to the driven member, where rotation of the drive member induces rotational and longitudinal movement of the collar along a longitudinal shaft, wherein the longitudinal shaft is fixed longitudinally with respect to the drive member; and
a coupler member coupled to the collar, the coupler member adapted to removably couple the input member to the output member;
wherein, as the collar moves longitudinally along the longitudinal shaft, the coupler member moves longitudinally between a first position in which the input member and output member are coupled and a second position in which the input member and output member are decoupled from one another; and
wherein the driven member comprises a substantially disc-shaped body having a first flange and a second flange, the first and second flanges extending longitudinally from the disc-shaped structure.

3. The disconnect mechanism of claim 2 , wherein the collar comprises a substantially cylindrical body having a bore defined therethrough for threadedly engaging the shaft.

4. The disconnect mechanism of claim 3 , wherein the substantially cylindrical body has an outer thickness and a first recessed portion and a second recessed portion defined in the substantially cylindrical body, where the first recessed portion is radially offset from the second recessed portion.

5. The disconnect mechanism of claim 4 , wherein the first flange engages the first recessed portion and the second flange engages the second recessed portion, whereby the driven member and collar rotate in a substantially concomitant relationship to one another.

6. The disconnect mechanism of claim 2 , wherein:
the coupler member comprises a substantially cylindrical body having a bore defined therethrough; and
the coupler member comprises a shoulder disposed internally within the bore, where a bearing is disposed between the shoulder and the collar.

7. The disconnect mechanism of claim 2 , wherein:
the drive member is disposed along a first centerline;
the driven member, collar, and coupler member are disposed along a second centerline, where the first centerline and second centerline are offset from one another.

8. A disconnect mechanism, comprising:
an output member and an input member, the output member configured to rotationally drive the input member;
an intermediate member disposed between the output member and input member, where the intermediate member is removably coupled to the output member and rotationally coupled to the input member;
a drive member configured to be rotationally driven;
a driven member rotationally coupled to the drive member;
a collar rotatably coupled to the driven member, where rotation of the drive member induces longitudinal movement of the collar along an elongated shaft; and
a coupler member coupled to the collar, the coupler member adapted to be removably coupled to the output member;
wherein, as the collar moves longitudinally along the elongated shaft, the coupler member moves between a first position on the longitudinal shaft and a second position on the longitudinal shaft;
further wherein, in the first position the intermediate member and output member are rotatably coupled to the coupler member, and in the second position the output member is decoupled from the coupler member;
an outer housing in which at least the drive member, driven member, intermediate member, collar and coupler member are disposed;
an access port defined in the outer housing, the access port being axially aligned with the drive member such that the drive member is accessible through the access port; and
a securable fastener coupled to the outer housing at the access port, wherein when the fastener is coupled to the access port, the fastener is adapted to limit or prevent rotational movement of the drive member.

9. The disconnect mechanism of claim 8 , wherein:
the drive member is disposed along a first centerline;
the input member is disposed along a second centerline; and
the intermediate member, driven member, collar, and coupler member are disposed along a third centerline;
wherein, the first centerline, second centerline, and third centerline are parallel and offset from one another.

10. The disconnect mechanism of claim 8 , wherein:
the driven member comprises a substantially disc-shaped body having a first flange and a second flange, the first and second flanges extending longitudinally from the disc-shaped structure; and
the collar comprises a substantially cylindrical body having a bore defined therethrough for threadedly engaging the shaft, the substantially cylindrical body defining a first recessed portion and a second recessed portion, where the first recessed portion is radially offset from the second recessed portion;
further wherein, the first flange engages the first recessed portion and the second flange engages the second recessed portion, whereby the driven member and collar rotate in a substantially concomitant relationship to one another.

11. A disconnect mechanism for removably coupling an input member and an output member to one another, comprising:
a drive member configured to be rotationally driven;
a driven member rotationally coupled to the drive member;
a collar rotatably coupled to the driven member, where rotation of the drive member induces rotational and longitudinal movement of the collar along a longitudinal shaft, wherein the longitudinal shaft is fixed longitudinally with respect to the drive member; and
a coupler member coupled to the collar, the coupler member adapted to removably couple the input member to the output member;
wherein, as the collar moves longitudinally along the longitudinal shaft, the coupler member moves longitudinally between a first position in which the input member and output member are coupled and a second position in which the input member and output member are decoupled from one another, and wherein the driven member comprises a substantially disc-shaped body having a flange extending longitudinally from the disc-shaped structure.

12. The disconnect mechanism of claim 11 , wherein the collar comprises a substantially cylindrical body having a bore defined therethrough for threadedly engaging the shaft.

13. The disconnect mechanism of claim 12 , wherein the substantially cylindrical body has an outer thickness and a first recessed portion and a second recessed portion defined in the substantially cylindrical body, where the

Assignees

• Allison Transm Inc

Inventors

• Combs Robert F
• Barker Charles A
• Priest James

Classifications

• F16D11/14 Primary

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• F16D2023/123

  Clutch actuation by cams, ramps or ball-screw mechanisms · CPC title

• F16D23/12

  Mechanical clutch-actuating mechanisms arranged outside the clutch as such (specific for combined clutches F16D21/00; mechanisms specific for synchronisation F16D23/02) · CPC title