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WO2005050062A1 - A linear ballscrew actuator with a safety unlocking device - Google Patents

A linear ballscrew actuator with a safety unlocking device Download PDF

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Publication number
WO2005050062A1
WO2005050062A1 PCT/EP2004/012202 EP2004012202W WO2005050062A1 WO 2005050062 A1 WO2005050062 A1 WO 2005050062A1 EP 2004012202 W EP2004012202 W EP 2004012202W WO 2005050062 A1 WO2005050062 A1 WO 2005050062A1
Authority
WO
WIPO (PCT)
Prior art keywords
axially
rod
actuator according
controlled
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2004/012202
Other languages
French (fr)
Inventor
Levi Sappe'
Mariano Ruggiero
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF AB
Original Assignee
SKF AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SKF AB filed Critical SKF AB
Priority to DE112004002095T priority Critical patent/DE112004002095T5/en
Publication of WO2005050062A1 publication Critical patent/WO2005050062A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2021—Screw mechanisms with means for avoiding overloading

Definitions

  • the present invention relates to a linear ballscrew actuator with a ballscrew mechanism and a safety unlocking device for uncoupling the ballscrew mechanism from a mechanical member controlled by the mechanism in the event of a failure .
  • Ballscrew actuators are often used for accomplishing movements and positioning of mechanical members in many different applications, for example in the aeronautical field.
  • An inconvenience that may occur with a ballscrew is the jamming of the balls along their path within the ballscrew.
  • the translational movements of an input control member are detected by a sensor which drives an electric motor associated with a ballscrew.
  • the rotational movement of the rotor of the electric motor is converted into translational movement by the ballscrew mechanism for controlling the translation of a controlled mechanical member with an axial force of multiplied strength with respect to the force imparted to the control member.
  • a primary object of the present invention is to provide a reliable actuator, capable of ensuring control of the driven member also in the event of a mechanical failure (for example jamming) of the ballscrew mechanism and/or an electrical or mechanical failure of the drives controlling it (typically an electric motor) .
  • Another object of the invention is to provide a linear actuator having compact dimensions, consisting of a reduced number of components, economical to manufacture.
  • Figure 1 is a schematic sectional view of an actuator according to the invention
  • Figure 2 is an enlarged view of a detail indicated II in figure 1
  • Figure 3 is a further enlarged view of another detail of Figure 1.
  • the translating control member 1 is a lever connected to a brake pedal (not shown) .
  • a brake pedal not shown
  • the electromechanical actuator 2 comprises an electric motor 4, preferably of the brushless type, with an outer stator 5 and an inner rotor 6 keyed onto the nut 7 of a ballscrew mechanism 8 comprised of an inner screw 9 axially translatable along the longitudinal axis x.
  • the rotation of the nut 7 which is supported at opposite ends by bearings 10 and 11, causes the screw 9 to translate linearly so as to transmit this linear motion to the output member 3, which is in form of a piston.
  • the spherical end la of the control member 1 is engaged in a block 12 axially slidably accommodated within a bushing 13 which, in turn, is slidably accommodated in the actuator housing 14.
  • the screw 9 forms a cylindrical axial central passage 15 in which there is guided a tubular stem 16 - herein termed "intermediate" - which is coupled with the bushing 13 at the input end (to the right in the drawing) , whilst it cooperates at the output end (to the left) in a thrust relationship with the piston 3, which is also guided and partially accommodated in the cylindrical passage 15.
  • a ball locking and unlocking device which allows to axially releasably connect the screw 9 to the output piston 3, as described herein after.
  • the axially innermost length of the output piston 3 is tubular and has a cylindrical cavity 3a crossed by a number of radial passages 17 containing respective locking balls 18 radially interposed between a circumferential groove 19 (figure 2) formed on the axial cylindrical passage 15 of the screw 9 and a radial circumferential protrusion 21 of an unlocking rod 20.
  • the rod 20 is coaxially accommodated and axially slidingly guided within the axial cavity 22 of the tubular stem 16 and is fixed at the input end to the block 12.
  • a helical compression spring 26 is axially interposed between the block 12 and the bushing 13. It should be noted that in the normal operation position illustrated in figure 1 the block 12 is axially spaced apart from the right end of the tubular stem 16.
  • the rod 20 is in an axial position such that the radial circumferential protrusion 21 is radially aligned with the groove 19 of the screw 9, and the locking balls 18 are held in a radially outer locking position engaged in the groove 19.
  • the locking balls 18 determine a path along which the axial forces and movements of the screw 9 are transmitted to the output piston 3.
  • An axial force applied (by the brake pedal) to the input control member 1 causes the block 12 to shift axially.
  • a sensor 24 detects the relative axial movement between the block 12 and the bushing 13 and, through a cable 25, activates the electric motor 4.
  • the driving torque outputted by the electric motor is converted by the screw mechanism 8 in a linear translation of the screw 9, which pulls the piston 3 with it owing to the locking action exerted by the balls 18.
  • a rotation sensor (not shown) operatively connected to an electronic processing unit (not shown) for providing data of the angular position of the nut 7 indicative of the instantaneous axial position of the screw 9 and the piston 3.
  • the screw 9 can not translate axially, the block 12 can be urged into abutment against the input end of the intermediate tubular stem 16 , compressing the spring 26.
  • the rod 20 slides with respect to the tubular stem 16 and the piston 3, and reaches, with respect to these members, a more advanced relative axial position in which the locking balls 18 are forced to retract into a radially inner position in a length 27 of smaller diameter of the rod (figure 2) , to such an extent that the ballscrew mechanism is axially uncoupled from the output piston 3.
  • the movements imparted by the control member 1 are so transmitted directly to the output piston 3 through the alternative path defined by the intermediate tubular stem 16. In other words, the electric motor 4 and the screw mechanism 8 are bypassed and control of the output member 3 is ensured.
  • a circlip 23 is mounted in a groove 28 formed in the inner cylindrical surface of the bushing 13 for the purpose of preventing the block 12 from slipping off the bushing 13 when the block 12 approaches its end position to the right.
  • the circlip 23, on the other hand, does not hinder relative axial movement between the block 12 and the bushing 13 when the control member 1 translates towards the right .
  • the control that provokes relative sliding of the rod 20 with respect to the tubular stem 16, and therefore the uncoupling of the balls 18, may either be of mechanical kind, as in the illustrated example, or of other kind, for example of electrical kind, through an electromagnet or other means.
  • unlocking is determined by the fact that the control force overcomes the resistance offered by the opposing spring.
  • the invention is not limited to the embodiment described and illustrated herein, which is to be considered as an example of the actuator; in fact, the invention can be modified in respect of the form and arrangements of parts and details of construction, and in respect of its operation.
  • the translatable member of the screw mechanism may be the nut instead of the screw, as will be apparent to those skilled in the art.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The actuator controls the axial translation of a controlled output member (3) in response to axial movements of an input control member (1). A ballscrew mechanism (8.) has a rotatable nut (7) and an axially translatable screw (9) for coupling to the output member (3). An unlocking device includes a rod (20) secured to the control member (1) and locking balls (18) interposed between the rod (20), the controlled member (3) and the screw (9), whereby axial movement of the rod (20) with respect to the screw (9) causes the locking balls (18) to move from radially outer positions, in which the controlled member (3) is axially locked to the screw (9), to radially inner positions in which the controlled member (3) is axially released from the screw (9). An intermediate stem (16) is slidable in a passage (15) formed through the screw (9). The stem (16) transmits the axial movements of the control member (1) to the controlled member (3) when the latter is axially released from the screw (9).

Description

A linear ballscrew actuator with a safety unlocking device
The present invention relates to a linear ballscrew actuator with a ballscrew mechanism and a safety unlocking device for uncoupling the ballscrew mechanism from a mechanical member controlled by the mechanism in the event of a failure .
Ballscrew actuators are often used for accomplishing movements and positioning of mechanical members in many different applications, for example in the aeronautical field. An inconvenience that may occur with a ballscrew is the jamming of the balls along their path within the ballscrew.
With an electromechanical linear actuator with a ballscrew mechanism, to which the present invention pertains, the translational movements of an input control member are detected by a sensor which drives an electric motor associated with a ballscrew. The rotational movement of the rotor of the electric motor is converted into translational movement by the ballscrew mechanism for controlling the translation of a controlled mechanical member with an axial force of multiplied strength with respect to the force imparted to the control member.
In the event of a mechanical failure of the ballscrew mechanism, or an electrical failure of the electric motor or the electronics associated therewith, the transmission of the movements between the control member and the controlled member is interrupted.
In an attempt to ensure the transmission of movement also in case of a mechanical failure of the ballscrew, several arrangements have been proposed providing for example dual driving members or a dual ballscrew. See, for example, US- 4637272, US-4149430, US-5144851.
A primary object of the present invention is to provide a reliable actuator, capable of ensuring control of the driven member also in the event of a mechanical failure (for example jamming) of the ballscrew mechanism and/or an electrical or mechanical failure of the drives controlling it (typically an electric motor) .
Another object of the invention is to provide a linear actuator having compact dimensions, consisting of a reduced number of components, economical to manufacture.
These and other objects and advantages, which will be made clearer below, are achieved according to the invention by an actuator having the features defined in the attached claims .
The structural and functional features of a preferred but not restrictive embodiment of an actuator according to the invention will now be described; reference is made- to the attached drawings, in which: Figure 1 is a schematic sectional view of an actuator according to the invention; Figure 2 is an enlarged view of a detail indicated II in figure 1; and Figure 3 is a further enlarged view of another detail of Figure 1.
With reference to figure 1, the axial translating movements of an input control member 1 are amplified and transmitted by an electromechanical actuator designated overall 2 to an axially translatable output member 3.
Throughout the present description and in the following claims, terms and expressions indicating positions and orientations such as "radial", "transversal" or "axial" and "longitudinal" are considered to relate to the longitudinal axis x of the controlled member 3.
In the illustrated example, the translating control member 1 is a lever connected to a brake pedal (not shown) . Naturally, reference to this possible field of use should not be interpreted as in any way limiting of the scope of the invention.
The electromechanical actuator 2 comprises an electric motor 4, preferably of the brushless type, with an outer stator 5 and an inner rotor 6 keyed onto the nut 7 of a ballscrew mechanism 8 comprised of an inner screw 9 axially translatable along the longitudinal axis x. The rotation of the nut 7 which is supported at opposite ends by bearings 10 and 11, causes the screw 9 to translate linearly so as to transmit this linear motion to the output member 3, which is in form of a piston.
The spherical end la of the control member 1 is engaged in a block 12 axially slidably accommodated within a bushing 13 which, in turn, is slidably accommodated in the actuator housing 14.
The screw 9 forms a cylindrical axial central passage 15 in which there is guided a tubular stem 16 - herein termed "intermediate" - which is coupled with the bushing 13 at the input end (to the right in the drawing) , whilst it cooperates at the output end (to the left) in a thrust relationship with the piston 3, which is also guided and partially accommodated in the cylindrical passage 15.
In order to ensure the transmission of the axial movement from the screw mechanism 8 to the piston 3 there is provided a ball locking and unlocking device which allows to axially releasably connect the screw 9 to the output piston 3, as described herein after.
The axially innermost length of the output piston 3 is tubular and has a cylindrical cavity 3a crossed by a number of radial passages 17 containing respective locking balls 18 radially interposed between a circumferential groove 19 (figure 2) formed on the axial cylindrical passage 15 of the screw 9 and a radial circumferential protrusion 21 of an unlocking rod 20. The rod 20 is coaxially accommodated and axially slidingly guided within the axial cavity 22 of the tubular stem 16 and is fixed at the input end to the block 12.
A helical compression spring 26 is axially interposed between the block 12 and the bushing 13. It should be noted that in the normal operation position illustrated in figure 1 the block 12 is axially spaced apart from the right end of the tubular stem 16.
During normal operation, as shown also in figure 2, the rod 20 is in an axial position such that the radial circumferential protrusion 21 is radially aligned with the groove 19 of the screw 9, and the locking balls 18 are held in a radially outer locking position engaged in the groove 19. In this position, the locking balls 18 determine a path along which the axial forces and movements of the screw 9 are transmitted to the output piston 3. An axial force applied (by the brake pedal) to the input control member 1 causes the block 12 to shift axially. A sensor 24 detects the relative axial movement between the block 12 and the bushing 13 and, through a cable 25, activates the electric motor 4. The driving torque outputted by the electric motor is converted by the screw mechanism 8 in a linear translation of the screw 9, which pulls the piston 3 with it owing to the locking action exerted by the balls 18.
Fitted to the bearing 10 is a rotation sensor (not shown) operatively connected to an electronic processing unit (not shown) for providing data of the angular position of the nut 7 indicative of the instantaneous axial position of the screw 9 and the piston 3.
If, owing to an electrical failure of the motor 4 or a mechanical failure of the mechanism 8, the screw 9 can not translate axially, the block 12 can be urged into abutment against the input end of the intermediate tubular stem 16 , compressing the spring 26. In these conditions, the rod 20 slides with respect to the tubular stem 16 and the piston 3, and reaches, with respect to these members, a more advanced relative axial position in which the locking balls 18 are forced to retract into a radially inner position in a length 27 of smaller diameter of the rod (figure 2) , to such an extent that the ballscrew mechanism is axially uncoupled from the output piston 3. The movements imparted by the control member 1 are so transmitted directly to the output piston 3 through the alternative path defined by the intermediate tubular stem 16. In other words, the electric motor 4 and the screw mechanism 8 are bypassed and control of the output member 3 is ensured.
With reference to figure 3, a circlip 23 is mounted in a groove 28 formed in the inner cylindrical surface of the bushing 13 for the purpose of preventing the block 12 from slipping off the bushing 13 when the block 12 approaches its end position to the right. The circlip 23, on the other hand, does not hinder relative axial movement between the block 12 and the bushing 13 when the control member 1 translates towards the right .
The control that provokes relative sliding of the rod 20 with respect to the tubular stem 16, and therefore the uncoupling of the balls 18, may either be of mechanical kind, as in the illustrated example, or of other kind, for example of electrical kind, through an electromagnet or other means. In the preferred embodiment shown in the drawings, unlocking is determined by the fact that the control force overcomes the resistance offered by the opposing spring.
It is to be understood that the invention is not limited to the embodiment described and illustrated herein, which is to be considered as an example of the actuator; in fact, the invention can be modified in respect of the form and arrangements of parts and details of construction, and in respect of its operation. For example, the translatable member of the screw mechanism may be the nut instead of the screw, as will be apparent to those skilled in the art.

Claims

1. A linear ballscrew actuator for controlling translation movements of a controlled output member (3) along a longitudinal axis (x) in response to axial movements of an input control member (1) , of the type comprising a ballscrew mechanism (8) with a nut (7) and a screw (9) , one of which (9) is a member axially translatable along said axis (x) and capable of coupling with the output member (3) for causing axial translation thereof, characterised by comprising: an unlocking device with a rod (20) axially secured to the control member (1) and at least one locking means (18) interposed between the rod (20) , the controlled member (3) and the translatable member (9) of the ballscrew mechanism (8) , whereby axial movement of the rod (20) with respect to the translatable member (9) causes a substantially radial movement of the locking means (18) from a radially outer position, in which the controlled member (3) is axially locked to the translatable member (9) of the ballscrew mechanism (8) , to a radially inner position in which the controlled member (3) is in an axially released condition from the translatable member (9) , and an intermediate stem (16) slidingly accommodated in a longitudinal passage (15) formed through the ballscrew mechanism (8) , said stem (16) being disposed between the controlled member (3) and the control member (1) for transmitting axial movements of the control member (1) to the controlled member (3) when the latter is in said axially released condition from the translatable member (9) .
2. An actuator according to claim 1, characterised in that the rod (20) and the intermediate stem (16) are both accommodated in the longitudinal passage formed through the ballscrew mechanism (8) .
3. An actuator according to claim 2, characterised in that the intermediate stem (16) is a tubular stem with an axial cavity (22) and the rod (20) is accommodated coaxially and guided axially slidingly within said axial cavity (22) of the tubular stem (16) .
4. An actuator according to claim 1, characterised in that the controlled member (3) has an end portion with an axial cavity (3a) accommodating a portion of the rod (20) having a radial protrusion (21) for urging the locking means (18) in said radially outer position against a seat (19) formed in the translatable member (9) of the ballscrew mechanism (8) .
5. An actuator according to claim 4, characterised in that the end portion of the controlled member (3) having said axial cavity (3a) is crossed by at least one radial passage (17) containing said locking means (18) .
6. An actuator according to claim 5, characterised by comprising a plurality of said locking means (18) contained in respective radial passages (17) formed at angularly spaced positions through said end portion of the controlled member
(3) having said axial cavity (3a) .
7. An actuator according to claim 1, characterised in that the rod (20) is fixed at an input end thereof to a block (12) connected to the input control member (1) .
8. An actuator according to claim 7, characterised in that the block (12) is axially slidingly coupled with to a body (13) fixed to the intermediate stem (16) .
9. An actuator according to claim 8, characterised in that the body (13) is a bushing slidingly accommodated in a housing (14) of the actuator.
10. An actuator according to claim 8, characterised in that between the block (12) and the body (13) there is interposed an elastic means (26) adapted for being axially compressed when the rod (20) moves axially with respect to the translatable member (9) for axially releasing the controlled member (3) from the ballscrew mechanism (8) .
11. An actuator according to claim 7, characterised in that the block (12) is axially spaced apart from the input end of the tubular stem (16) when the controlled member (3) is axially locked to the screw mechanism (8) .
12. An actuator according to claim 1, characterised in that the actuator is an electromechanical actuator (2) comprising an electric motor (4) with an outer stator (5) and an inner rotor (6) secured onto the rotatable nut (7) of a ballscrew mechanism (8) comprised of an axially translatable inner screw (9) .
13. An actuator according to claim 1, characterised in that the axial movements of the rod (20) and/or the stem (16) are imparted by an electromagnetically driven input control member (1) .
PCT/EP2004/012202 2003-10-31 2004-10-28 A linear ballscrew actuator with a safety unlocking device Ceased WO2005050062A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112004002095T DE112004002095T5 (en) 2003-10-31 2004-10-28 Linear ball screw actuator with safety release device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2003A000856 2003-10-31
ITTO20030856 ITTO20030856A1 (en) 2003-10-31 2003-10-31 LINEAR SCREW SCREW ACTUATOR WITH A SAFETY RELEASE DEVICE.

Publications (1)

Publication Number Publication Date
WO2005050062A1 true WO2005050062A1 (en) 2005-06-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/012202 Ceased WO2005050062A1 (en) 2003-10-31 2004-10-28 A linear ballscrew actuator with a safety unlocking device

Country Status (3)

Country Link
DE (1) DE112004002095T5 (en)
IT (1) ITTO20030856A1 (en)
WO (1) WO2005050062A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002322475B2 (en) * 2001-06-26 2008-02-21 North Carolina State University Blocking peptide for inflammatory cell secretion
EP1785346A3 (en) * 2005-11-15 2008-03-26 Honeywell International Inc. Flight control surface actuator assembly
EP2051353A3 (en) * 2007-10-15 2012-11-07 Schaeffler Technologies AG & Co. KG Drive unit
DE102011118240A1 (en) * 2011-11-10 2013-05-16 Liebherr-Aerospace Lindenberg Gmbh Mechanical release mechanism
WO2014012409A1 (en) * 2012-07-18 2014-01-23 上海鸣志电器股份有限公司 Linear stepper motor
FR3006379A1 (en) * 2013-06-04 2014-12-05 Sagem Defense Securite ACTUATING DEVICE FOR MOVING A MOBILE HOOD FROM A THRUST INVERTER
EP3339685A1 (en) * 2016-12-22 2018-06-27 Goodrich Actuation Systems SAS An actuator
WO2019078727A1 (en) * 2017-10-17 2019-04-25 Electrical Subsea & Drilling As Electro mechanical power actuator
IT201900001797A1 (en) * 2019-02-07 2020-08-07 Automotive Lighting Italia Spa DEVICE FOR TRANSMISSION OF MOTION BETWEEN A FIRST AND A SECOND COMPONENT WITH A FORCE LIMITER FUNCTION, IN PARTICULAR APPLICABLE TO A LIGHTING DEVICE FOR VEHICLES
CN116172723A (en) * 2023-02-08 2023-05-30 天津大学 Manipulator for controlling surgical robots
US20230358300A1 (en) * 2022-05-04 2023-11-09 Halliburton Energy Services, Inc. Linear actuators, motor assemblies, and methods to actuate a device or load

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US4179944A (en) * 1977-06-27 1979-12-25 United Technologies Corporation Fail safe redundant actuator
DE3228646A1 (en) * 1982-07-31 1984-02-09 Peddinghaus, Rolf, Dipl.-Ing., 5828 Ennepetal Parallel vice with device for idle displacement of the movable clamping jaw
EP0569775A1 (en) * 1992-05-07 1993-11-18 A RÖMHELD GmbH & CO KG Spindle drive with quick release drive spindle
US6237433B1 (en) * 1998-05-12 2001-05-29 Trw Systemes Aeronauliques Civils Electromechanical actuator of the type having a screw-and-nut system

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US4179944A (en) * 1977-06-27 1979-12-25 United Technologies Corporation Fail safe redundant actuator
DE3228646A1 (en) * 1982-07-31 1984-02-09 Peddinghaus, Rolf, Dipl.-Ing., 5828 Ennepetal Parallel vice with device for idle displacement of the movable clamping jaw
EP0569775A1 (en) * 1992-05-07 1993-11-18 A RÖMHELD GmbH & CO KG Spindle drive with quick release drive spindle
US6237433B1 (en) * 1998-05-12 2001-05-29 Trw Systemes Aeronauliques Civils Electromechanical actuator of the type having a screw-and-nut system

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002322475B2 (en) * 2001-06-26 2008-02-21 North Carolina State University Blocking peptide for inflammatory cell secretion
EP1785346A3 (en) * 2005-11-15 2008-03-26 Honeywell International Inc. Flight control surface actuator assembly
US7610828B2 (en) 2005-11-15 2009-11-03 Honeywell International Inc. Flight control surface actuator assembly including a free trial mechanism
EP2051353A3 (en) * 2007-10-15 2012-11-07 Schaeffler Technologies AG & Co. KG Drive unit
DE102011118240A1 (en) * 2011-11-10 2013-05-16 Liebherr-Aerospace Lindenberg Gmbh Mechanical release mechanism
DE102011118240B4 (en) 2011-11-10 2023-08-24 Liebherr-Aerospace Lindenberg Gmbh Mechanical release mechanism
WO2014012409A1 (en) * 2012-07-18 2014-01-23 上海鸣志电器股份有限公司 Linear stepper motor
FR3006379A1 (en) * 2013-06-04 2014-12-05 Sagem Defense Securite ACTUATING DEVICE FOR MOVING A MOBILE HOOD FROM A THRUST INVERTER
CN105378258A (en) * 2013-06-04 2016-03-02 萨基姆防卫安全 Actuating device for moving the movable cowl of the thrust reverser
US9476384B2 (en) 2013-06-04 2016-10-25 Sagem Defense Securite Actuation device for moving a movable cowling of a thrust-reverser
CN105378258B (en) * 2013-06-04 2016-10-26 萨基姆防卫安全 Actuating device for moving the movable cowl of the thrust reverser
WO2014195371A1 (en) * 2013-06-04 2014-12-11 Sagem Defense Securite Actuation device for moving a movable cowling of a thrust-reverser
EP3339685A1 (en) * 2016-12-22 2018-06-27 Goodrich Actuation Systems SAS An actuator
US10844938B2 (en) 2016-12-22 2020-11-24 Goodrich Actuation Systems Sas Actuator
WO2019078727A1 (en) * 2017-10-17 2019-04-25 Electrical Subsea & Drilling As Electro mechanical power actuator
GB2581687A (en) * 2017-10-17 2020-08-26 Electrical Subsea & Drilling As Electro mechanical power actuator
AU2018351421B2 (en) * 2017-10-17 2021-01-21 Electrical Subsea & Drilling As Electro mechanical power actuator
GB2581687B (en) * 2017-10-17 2022-07-20 Electrical Subsea & Drilling As Electro mechanical power actuator
US11454307B2 (en) 2017-10-17 2022-09-27 Electrical Subsea & Drilling As Electro mechanical power actuator
EP3693217A1 (en) * 2019-02-07 2020-08-12 Marelli Automotive Lighting Italy S.p.A. Con Socio Unico Linear motion transmission device between a first and a second component with a force limiter function, in particular applicable to a lighting device for vehicles
IT201900001797A1 (en) * 2019-02-07 2020-08-07 Automotive Lighting Italia Spa DEVICE FOR TRANSMISSION OF MOTION BETWEEN A FIRST AND A SECOND COMPONENT WITH A FORCE LIMITER FUNCTION, IN PARTICULAR APPLICABLE TO A LIGHTING DEVICE FOR VEHICLES
US20230358300A1 (en) * 2022-05-04 2023-11-09 Halliburton Energy Services, Inc. Linear actuators, motor assemblies, and methods to actuate a device or load
US11867263B2 (en) 2022-05-04 2024-01-09 Halliburton Energy Services, Inc. Linear actuators, motor assemblies, and methods to actuate a device or load
AU2022457107B2 (en) * 2022-05-04 2025-11-13 Halliburton Energy Services, Inc. Linear actuators, motor assemblies, and methods to actuate a device or load
CN116172723A (en) * 2023-02-08 2023-05-30 天津大学 Manipulator for controlling surgical robots
CN116172723B (en) * 2023-02-08 2026-01-23 天津大学 Manipulator for controlling surgical robot

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Publication number Publication date
ITTO20030856A1 (en) 2005-05-01
DE112004002095T5 (en) 2006-09-07

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