US 10,954,718 B2Granted

Transmission device

AssigneeSewell Power Transfer Pty Ltd

InventorSamuel John Sewell

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Abstract

A transmission device including a body, an input member extending along the body, and having a rotational axis, a gear assembly connected to the input member, having an inner gear, one or more intermediate gears engaged with the inner gear; and an outer gear engaged with one or more intermediate gears, wherein in a first position the gear assembly is configured to rotate at substantially the same rate as the input member and axial movement of at least one component to a second position, in a direction substantially parallel to the axis of rotation, allows the gear assembly to provide to an output member a different output rate relative to the input member, and an actuator movable between a first position at which the gear assembly moves to its first position and a second position at which the gear assembly moves to its second position, the actuator moves under hydraulic pressure.

Claims45

Dependent claims

A transmission device comprising:

a body assisting to support components including:
an input member extending at least part way along the body, the input member having an axis of rotation;
a gear assembly that is connected to the input member, the gear assembly having:
an inner gear;
one or more intermediate gears engaged with the inner gear;
and
an outer gear engaged with the one or more intermediate gears;
wherein in a first position the gear assembly is configured with the input member to rotate at substantially the same rate as the input member and axial movement of at least one component to a second position, in a direction substantially parallel to the axis of rotation, allows the gear assembly to provide to an output member a different output rate relative to the input member;
and
an actuator is movable between a first position at which the gear assembly can move to its first position, and a second position at which the gear assembly can move to its second position, said actuator being movable under the influence of hydraulic pressure,
wherein in response to the fluid pressure being on one side of a predetermined value or a determined value, the fluid is directed in the first direction and in response to the fluid pressure being on another side of the predetermined value or determined, the fluid is directed in the second direction.

8 more elements

A transmission device comprising:

a body assisting to support components including:
an input member extending at least part way along the body, the input member having an axis of rotation;
a gear assembly that is connected to the input member, the gear assembly having:
an inner gear;
one or more intermediate gears engaged with the inner gear;
and
an outer gear engaged with the one or more intermediate gears;
wherein in a first position the year assembly is configured with the input member to rotate at substantially the same rate as the input member and axial movement of at least one component to a second position, in a direction substantially parallel to the axis of rotation, allows the rear assembly to provide to an output member a different output rate relative to the input member;
and
an actuator is movable between a first position at which the gear assembly can move to its first position, and a second position at which the gear assembly can move to its second position, said actuator being movable under the influence of hydraulic pressure;
wherein the transmission device further includes a control system;
wherein the control system comprises at least one sensor for sensing hydraulic pressure in an hydraulic motor, the control system determining if hydraulic pressure is increasing and, if the control system determines that the rate of increase of the hydraulic pressure has slowed to below a predetermined value or to zero, the control system determining or recording a pressure value at which the rate of increase of the hydraulic pressure slowed to below the predetermined value or to zero, the control system then calculating a gear change hydraulic pressure from the determined or recorded pressure value, the key change hydraulic pressure representing a pressure at which the control system sends a signal to cause the transmission device to change from a higher output speed to a lower output speed.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/336,860Filed 28 Sep 2017
Priority: AU 201690393328 Sep 2016
Published: US 2019/0226281 A125 Jul 2019
Granted: 23 Mar 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

E21B 4/006
Drives for drilling, used in the borehole: mechanical motion converting means, e.g. reduction gearings
F16H 3/44
Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion: using gears having orbital motion
F16H 3/54
Comprising orbital spur gears: one of the central gears being internally toothed and the other externally toothed
F16H 59/14
Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion: inputs being a function of torque or torque demand