Driving device

Patent metadata

Field	Value
Publication number	US-11242876-B2
Application number	US-201716473606-A
Country	US
Kind code	B2
Filing date	Dec 27, 2017
Priority date	Dec 27, 2016
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A drive device includes a screw-and-nut system comprising a threaded rod and a first nut that is connected to the threaded rod by means of a screw connection; a gearset, allowing a rotational movement to be transmitted to the threaded rod, a first toothed wheel and a second toothed wheel engaged with the first toothed wheel; a set of stops comprising a first stop connected to the first wheel rotating about an axis of rotation of the first wheel and a second stop connected to the second toothed wheel rotating about an axis of rotation of the second wheel, the first stop and the second stop being configured and arranged to butt against one another so as to limit an angular travel of the threaded rod at a first angular position in a first direction.

First claim

The invention claimed is:

1. A drive device comprising:
a screw-and-nut system comprising a threaded rod and a first nut that is connected to the threaded rod by means of a screw connection;
a gearset, allowing a rotational movement to be transmitted to the threaded rod, a first toothed wheel and a second toothed wheel engaged with the first toothed wheel;
a set of stops comprising a first stop connected to the first wheel rotating about an axis of rotation of the first wheel and a second stop connected to the second toothed wheel rotating about an axis of rotation of the second wheel, the first stop and the second stop being configured and arranged to butt against one another so as to limit an angular travel of the threaded rod at a first angular position in a first direction.

2. The drive device as claimed in claim 1 , wherein the first stop and the second stop are configured and arranged to butt against one another so as to limit the angular travel of the threaded rod at a second angular position in a second direction, opposite the first direction.

3. The drive device as claimed in claim 1 , wherein the set of stops comprises a third stop connected to the first wheel rotating about the axis of rotation of the first wheel or connected to the second toothed wheel rotating about the axis of rotation of the second wheel and configured and arranged to butt against the second stop, or respectively against the first stop, so as to limit the angular travel of the threaded rod at a second angular position in a second direction, opposite the first direction.

4. The drive device as claimed in claim 1 , wherein the set of stops comprises a first additional stop connected to the second toothed wheel rotating about the axis of rotation of the second wheel and a second additional stop connected to the first wheel rotating about the axis of rotation of the first wheel, the first additional stop and the second additional stop being configured and arranged to butt against one another so as to limit an angular travel of the threaded rod at a second angular position in the second direction, opposite the first direction.

5. The drive device as claimed in claim 1 , wherein the first toothed wheel has a first number of teeth and the second toothed wheel has a second number of teeth, different from the first number of teeth.

6. The drive device as claimed in claim 5 , wherein the first number of teeth and the second number of teeth together make a prime number.

7. The drive device as claimed in claim 1 , wherein at least one stop of the set of stops is able to occupy a plurality of predetermined set angular positions, with respect to the wheel to which it is rotationally connected, about the axis of rotation of the wheel.

8. The drive device as claimed in claim 7 , wherein at least one stop is mounted removably on the first wheel or on the second wheel at one angular position taken from a plurality of angular positions.

9. The drive device as claimed in claim 1 , comprising a motor that is coupled to the threaded rod and drives the threaded rod so that it rotates on the longitudinal axis.

10. The drive device as claimed in claim 9 , wherein the threaded rod is coupled to the motor via a torque limiter.

11. The drive device as claimed in claim 9 , wherein the threaded rod is coupled to the motor via a torque limiter and a freewheel which are configured to limit a turning torque of the threaded rod on its longitudinal axis to one direction of rotation only.

12. The drive device as claimed in claim 9 , comprising a control member and at least one sensor for detecting a first operational maximum angular position of the threaded rod in the first direction preceding the first angular position in the first direction, the control member receiving measurements from the first position sensor and being configured to control the motor on the basis of the measurements from the sensor so as to stop the motor when the first limit angular position is reached.

13. The drive device as claimed in claim 1 , comprising a grip that is rigidly connected to one toothed wheel of the gearset allowing an operator to turn said toothed wheel on an axis of rotation of said toothed wheel.

14. A strapping device for binding an object comprising a clamping strip comprising a first end and a second end and forming a loop that is intended to surround the object, the strapping device comprising a drive device as claimed in claim 1 , the drive device allowing the two ends to move with respect to one another so as to increase or decrease the size of the loop, the first end of the strap being rigidly connected to the first nut in translation along the axis of the threaded rod.

15. The strapping device as claimed in claim 14 , wherein the first nut is engaged with a first screw thread of the threaded rod, the screw-and-nut system comprising a second nut engaged with a second screw thread of the threaded rod which is formed in the opposite direction to the first thread, the second end of the clamping strip being rigidly connected to the second nut in translation along the axis of the threaded rod.

16. A holding device for gripping a hollow object, said device comprising a first pad and a second pad which are capable of pressing against a hollow object, on the interior of the object, the holding device comprising a drive device as claimed in claim 1 , configured to move the two pads in relation to one another so as to move them away from one another in order to grip the object or to move them closer together in order to release the object, the first pad being rigidly connected to the first nut in translation along the axis of the threaded rod, the screw-and-nut system comprising a second nut engaged with a second screw thread which is formed in the opposite direction to the first thread, the second pad being rigidly connected to the second nut in translation along the axis of the threaded rod.

Assignees

• Thales Sa

Inventors

• Cadalen François
• Fraisse Yohann
• Warnan François

Classifications

• B64D7/00

  Arrangement of military equipment, e.g. armaments, armament accessories or military shielding, in aircraft; Adaptations of armament mountings for aircraft (dropping bombs or the like B64D1/00) · CPC title

• F16H2025/2059

  Common movement by two screws or two nuts, e.g. two connected screws with opposite thread direction · CPC title

• F16B2/08

  using bands · CPC title

• F16H25/2015

  Means specially adapted for stopping actuators in the end position; Position sensing means · CPC title

• F16B2/065 Primary

  using screw-thread elements (F16B2/08 - F16B2/12 take precedence) · CPC title