阅读说明：本技术 一种传动机构模糊卡塞故障强制解锁机电作动器及方法 (Electromechanical actuator and method for forcibly unlocking fuzzy jamming fault of transmission mechanism ) 是由 宋洪舟 于志远 董辉立 徐强 欧杨湦 宋显成 侯占林 于 2021-07-16 设计创作，主要内容包括：一种传动机构模糊卡塞故障强制解锁机电作动器,包括：双向电磁制动组件、周向旋转壳体组件、轴向花键承载组件以及机电作动器组件。机电作动器组件、双向电磁制动组件、周向旋转壳体组件、轴向花键承载组件依次布置于同一轴线上,轴向花键承载组件安装于周向旋转壳体组件的内部,构成往复直线运动,且轴向花键承载组件与机电作动器组件的输出转轴连接,构成螺旋传动副；双向电磁制动组件通过主动通电控制同时产生径向和轴向吸合力,使得周向旋转壳体组件脱开与机电作动器组件的固定连接,作出旋转运动,进而迫使轴向花键承载组件与机电作动器组件的连接作用失效,强制解除机电作动器组件中的转子丝杆与轴向花键承载组件的传动机构卡塞或卡滞故障。(An electro-mechanical actuator for forcibly unlocking a fuzzy jam fault of a transmission mechanism, comprising: the brake comprises a bidirectional electromagnetic brake assembly, a circumferential rotating shell assembly, an axial spline bearing assembly and an electromechanical actuator assembly. The electromechanical actuator assembly, the bidirectional electromagnetic brake assembly, the circumferential rotating shell assembly and the axial spline bearing assembly are sequentially arranged on the same axis, the axial spline bearing assembly is arranged inside the circumferential rotating shell assembly to form reciprocating linear motion, and the axial spline bearing assembly is connected with an output rotating shaft of the electromechanical actuator assembly to form a spiral transmission pair; the bidirectional electromagnetic braking assembly simultaneously generates radial and axial suction forces through active power-on control, so that the circumferential rotating shell assembly is disconnected from the fixed connection with the electromechanical actuator assembly to make a rotating motion, the connection between the axial spline bearing assembly and the electromechanical actuator assembly is forced to fail, and the jamming or clamping stagnation faults of a rotor screw rod in the electromechanical actuator assembly and a transmission mechanism of the axial spline bearing assembly are forced to be relieved.)

1. The utility model provides a drive mechanism fuzzy jam trouble is forced and is unblock electromechanical actuator which characterized in that: the method comprises the following steps: the device comprises a bidirectional electromagnetic braking assembly, a circumferential rotating shell assembly, an axial spline bearing assembly and an electromechanical actuator assembly;

the electromechanical actuator assembly, the bidirectional electromagnetic brake assembly, the circumferential rotating shell assembly and the axial spline bearing assembly are sequentially arranged on the same axis, the axial spline bearing assembly is arranged inside the circumferential rotating shell assembly to form reciprocating linear motion, and the axial spline bearing assembly is connected with an output rotating shaft of the electromechanical actuator assembly to form a spiral transmission pair; the bidirectional electromagnetic braking assembly simultaneously generates radial and axial suction forces through active power-on control, so that the circumferential rotating shell assembly is disconnected from the fixed connection with the electromechanical actuator assembly to make a rotating motion, the connection between the axial spline bearing assembly and the electromechanical actuator assembly is forced to fail, and the jamming or clamping stagnation faults of a rotor screw rod in the electromechanical actuator assembly and a transmission mechanism of the axial spline bearing assembly are forced to be relieved.

2. The actuator according to claim 1, wherein the actuator further comprises: the bidirectional electromagnetic brake assembly includes: the magnetic motor comprises an axial magnetic rotor (1), a floating magnetic stator (2), an electromagnetic coil stator (3), a spring (4), a fixing screw (5) and a magnetic steel ball (6);

the circumferentially rotatable housing assembly comprises: a circumferential rotation bearing seat (7) and an actuator shell (12);

the axial spline carrier assembly includes: an axial spline nut (10) and an axial spline barrel (11);

an electromechanical actuator assembly comprising: the device comprises a lead screw supporting bearing (8), a rotor lead screw (9), a front end cover (13), a front lug (14), a servo motor (15) and a rear lug (16);

an electromagnetic coil stator (3) of the bidirectional electromagnetic braking assembly is fixed on a circumferential rotating bearing seat (7), and an axial magnetic rotor (1) is fixed on a rotor screw rod (9);

when active power-on control is carried out, the electromagnetic coil stator (3) is axially attracted with the floating magnetic stator (2) and the axial magnetic rotor (1), so that the magnetic stator (2), the axial magnetic rotor (1) and the rotor screw rod (9) are fixedly connected into a whole; the electromagnetic coil stator (3) is used for radially attracting the magnetic steel ball (6), the steel ball (6) compresses the spring (4) to enter a groove where the circumferential rotating bearing seat (7) is located, so that the circumferential rotating bearing seat (7) is disconnected from the revolving connection with the shell of the servo motor (15), and the fixing screw (5) limits the steel ball (6) to move outwards, so that the spring (4) always forms a pre-pressing state;

the axial spline nut (10) and the rotor screw rod (9) are arranged on the same axis, and when the rotor screw rod (9) rotates in a fixed shaft mode, the axial spline nut (10) moves linearly through spiral transmission; the circumferential rotating bearing block (7) supports the bearing of the rotor screw rod (9) to rotate;

the outer circumference of the axial spline nut (10) is provided with a convex spline which is axially connected with a circumferential inner spline groove of the axial spline cylinder (11); the axial spline cylinder (11) is connected with the front lug (14) into a whole through threads and is used for being installed with an external rack; the screw rod supporting bearing (8), the rotor screw rod (9), the actuator shell (12), the front end cover (13), the front lug (14), the servo motor (15) and the rear lug (16) are sequentially arranged on the same axis.

3. The actuator according to claim 2, wherein the actuator further comprises: the relative rotation motion between the circumferential rotation bearing seat (7) and the rotor screw rod (9) is connected by a screw rod supporting bearing (8).

4. The actuator according to claim 2, wherein the actuator further comprises: the protruding spline that axial spline nut (10) lateral surface interlude was equipped with is the rectangular spline, and when axial spline nut (10) and rotor lead screw (9) normally meshed the transmission, a plurality of rectangular splines of axial spline nut (10) lateral surface interlude and the spline groove cooperation that axial spline section of thick bamboo (11) inner wall was equipped with are connected for both can only do axial reciprocating motion.

5. The actuator according to claim 4, wherein the actuator further comprises: when the axial spline cylinder (11) is driven to rotate by the actuator shell (12), the rectangular splines on the axial spline nut (10) are disconnected with the spline grooves on the inner side of the axial spline cylinder (11).

6. The actuator according to claim 5, wherein the actuator further comprises: when the axial spline nut (10) and the rotor lead screw (9) are jammed or stuck, the two-way electromagnetic brake assembly is actively electrified and controlled, the actuator shell (12) drives the axial spline cylinder (11) to rotate for a certain angle, and the axial spline cylinder (11) and the axial spline nut (10) are forced to be disconnected from axial connection.

7. The actuator according to claim 5, wherein the actuator further comprises: a raised square block is arranged on the outer side of the axial spline nut (10) and reciprocates in a sliding groove of the actuator shell (12); the height of the convex square block is greater than the height of the convex spline arranged on the outer side of the axial spline nut (10).

8. The actuator according to claim 7, wherein the actuator further comprises: the side surface of the axial spline cylinder (11) is provided with a fan-shaped notch for avoiding the geometric interference of a convex square block arranged on the axial spline nut (10).

9. The actuator according to claim 2, wherein the actuator further comprises: the electromechanical actuator assembly further comprises a linear displacement sensor, and after the linear displacement sensor of the electromechanical actuator assembly feeds back that the rotation distance of the ball screw pair is inconsistent with the linear displacement distance, the occurrence of jamming, clamping stagnation or loosening faults is judged.

10. The method for forcibly unlocking the fuzzy jamming fault of the transmission mechanism by the electromechanical actuator according to any one of claims 2 to 9 is characterized by comprising the following steps:

step one, judging that jamming, clamping stagnation or loosening faults occur after a linear displacement sensor of a electromechanical actuator assembly feeds back that the rotation distance and the linear displacement distance of a ball screw pair are inconsistent;

secondly, the bidirectional electromagnetic braking component is actively electrified and controlled, the electromagnetic coil stator is axially attracted with the floating magnetic stator (2) and the axial magnetic rotor (1), so that the floating magnetic stator (2), the axial magnetic rotor (1) and a rotor screw rod (9) are fixedly connected into a whole;

step three, the magnetic steel ball (6) is radially sucked by the electromagnetic coil stator, and the steel ball (6) compresses the spring (4) to enter a groove arranged on the circumferential rotating bearing seat (7), so that the circumferential rotating bearing seat (7) is disconnected from the revolving connection with the shell of the servo motor (15);

and fourthly, the actuator shell (12) drives the axial spline cylinder (11) to rotate for a certain angle, the axial spline cylinder (11) is forced to be disconnected from the axial spline nut (10) in the axial direction, the connection function of the axial spline bearing assembly is further forced to be invalid, and the jamming and clamping faults of a transmission mechanism of the rotor screw rod (9) and the axial spline nut (10) are forcibly removed, so that the axial spline cylinder (11) and the front support lug (14) are in a floating state.

Technical Field

The invention relates to an electromechanical actuator, in particular to an electromechanical actuator for forcibly unlocking a fuzzy jamming fault of a transmission mechanism.

Background

In a traditional electromechanical actuator, a ball or roller screw is an important transmission mechanism for converting the rotary motion of a motor into linear motion, and has the characteristics of high efficiency and high precision. In the traditional application field, the failure modes of the transmission mechanism mainly comprise: breakage, reduced efficiency, mismatch in rotational and linear reach, lead instability, etc. However, the ball screw for the aerospace field generally has the use characteristics of high speed, high frequency and high overload. Under the special operating condition of aerospace, the failure mode of the transmission mechanism is different from that of the traditional application field, and the jamming and the clamping stagnation of the balls or the rollers are typical failure modes in the aerospace field.

From domestic and foreign patents, the principle of a linear electromechanical actuator for removing jamming or clamping stagnation faults is mostly based on redundancy design consideration, and two sets of ball screw pairs or roller screw pairs are adopted, so that the weight and the volume of the mechanism are obviously increased, and the power density is seriously reduced. The technical scheme of the prior transmission mechanism blocking and unlocking method is that the fault of a screw pair is required to be completely blocked, a servo motor can transmit torque to a shell by using a blocking point to remove the fault, but the problem of 'blocking and false blocking' of the screw pair possibly exists under the common condition, and the prior technical scheme cannot remove the fuzzy condition.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the electromechanical actuator has the greatest characteristic that the electromechanical actuator can carry out fault isolation forcibly no matter the 'jamming or clamping stagnation', and realizes safety after fault on the basis that the volume and the weight of the electromechanical actuator are not increased.

The technical solution of the invention is as follows:

an electro-mechanical actuator for forcibly unlocking a fuzzy jam fault of a transmission mechanism, comprising: the device comprises a bidirectional electromagnetic braking assembly, a circumferential rotating shell assembly, an axial spline bearing assembly and an electromechanical actuator assembly;

the electromechanical actuator assembly, the bidirectional electromagnetic brake assembly, the circumferential rotating shell assembly and the axial spline bearing assembly are sequentially arranged on the same axis, the axial spline bearing assembly is arranged inside the circumferential rotating shell assembly to form reciprocating linear motion, and the axial spline bearing assembly is connected with an output rotating shaft of the electromechanical actuator assembly to form a spiral transmission pair; the bidirectional electromagnetic braking assembly simultaneously generates radial and axial suction forces through active power-on control, so that the circumferential rotating shell assembly is disconnected from the fixed connection with the electromechanical actuator assembly to make a rotating motion, the connection between the axial spline bearing assembly and the electromechanical actuator assembly is forced to fail, and the jamming or clamping stagnation faults of a rotor screw rod in the electromechanical actuator assembly and a transmission mechanism of the axial spline bearing assembly are forced to be relieved.

Further, the bi-directional electromagnetic brake assembly comprises: the device comprises an axial magnetic rotor, a floating magnetic stator, an electromagnetic coil stator, a spring, a fixing screw and a magnetic steel ball;

the circumferentially rotatable housing assembly comprises: the circumferential rotation bearing seat and the actuator shell;

the axial spline carrier assembly includes: an axial spline nut and an axial spline barrel;

an electromechanical actuator assembly comprising: the device comprises a lead screw supporting bearing, a rotor lead screw, a front end cover, a front support lug, a servo motor and a rear support lug;

an electromagnetic coil stator of the bidirectional electromagnetic braking assembly is fixed on the circumferential rotating bearing seat, and an axial magnetic rotor is fixed on a rotor screw rod;

when the active power-on control is carried out, the electromagnetic coil stator axially attracts the floating magnetic stator and the axial magnetic rotor, so that the magnetic stator, the axial magnetic rotor and the rotor screw rod are fixedly connected into a whole; the electromagnetic coil stator radially attracts a magnetic steel ball, a steel ball compression spring enters a groove where the circumferential rotating bearing seat is located, so that the circumferential rotating bearing seat is disconnected from the revolving connection with the shell of the servo motor, and the fixing screw limits the steel ball to move outwards, so that the spring always forms a prepressing state;

the axial spline nut and the rotor screw rod are arranged on the same axis, and when the rotor screw rod rotates in a fixed shaft mode, the axial spline nut moves linearly through spiral transmission; the circumferential rotating bearing seat supports the bearing of the rotor screw rod to rotate;

the outer circumference of the axial spline nut is provided with a convex spline which is axially connected with a spline groove on the inner side of the circumference of the axial spline cylinder; the axial spline cylinder is connected with the front lug in a threaded manner and is used for being installed with an external rack; the screw rod supporting bearing, the rotor screw rod, the actuator shell, the front end cover, the front support lug, the servo motor and the rear support lug are sequentially arranged on the same axis.

Furthermore, the relative rotation motion between the circumferential rotation bearing seat and the rotor screw rod is connected by adopting a screw rod supporting bearing.

Further, the protruding form spline that axial spline nut lateral surface interlude was equipped with is the rectangular spline, and when axial spline nut and rotor lead screw normally meshed the transmission, a plurality of rectangular splines of axial spline nut lateral surface interlude and the spline groove cooperation that axial spline section of thick bamboo inner wall was equipped with are connected for both can only do axial reciprocating motion.

Further, when the axial spline cylinder is driven to rotate by the actuator shell, the rectangular splines on the axial spline nut are disconnected with the spline grooves on the inner side of the axial spline cylinder.

Furthermore, when the axial spline nut and the rotor screw rod are jammed or stuck, the bidirectional electromagnetic brake assembly is actively electrified and controlled, and the actuator shell drives the axial spline cylinder to rotate for a certain angle, so that the axial spline cylinder and the axial spline nut are forced to be disconnected from axial connection.

Furthermore, a convex square block is arranged on the outer side of the axial spline nut and reciprocates in a sliding groove of the actuator shell; the height of the convex square block is greater than the height of the convex spline arranged on the outer side of the axial spline nut.

Further, the axial spline cylinder side is equipped with fan-shaped breach for avoid being equipped with the geometric interference of protruding square piece with axial spline nut.

Furthermore, the electromechanical actuator assembly further comprises a linear displacement sensor, and after the linear displacement sensor of the electromechanical actuator assembly feeds back that the rotation distance of the ball screw pair is inconsistent with the linear displacement distance, the occurrence of jamming, clamping stagnation or loosening faults is judged.

Further, the invention also provides a forced unlocking method for the fuzzy jamming fault of the transmission mechanism, which comprises the following steps:

step one, judging that jamming, clamping stagnation or loosening faults occur after a linear displacement sensor of a electromechanical actuator assembly feeds back that the rotation distance and the linear displacement distance of a ball screw pair are inconsistent;

secondly, the bidirectional electromagnetic braking component is actively electrified and controlled, and the electromagnetic coil stator is axially attracted with the floating magnetic stator and the axial magnetic rotor, so that the floating magnetic stator and the axial magnetic rotor are fixedly connected with a rotor screw rod into a whole;

step three, the magnetic steel ball is radially attracted by the electromagnetic coil stator, and the steel ball compression spring enters a groove arranged on the circumferential rotating bearing seat, so that the circumferential rotating bearing seat is disconnected from the revolving connection with the shell of the servo motor;

and step four, the actuator shell drives the axial spline cylinder to rotate for a certain angle, so that the axial spline cylinder is forced to be disconnected from the axial spline nut in the axial direction, the connection effect of the axial spline bearing assembly is forced to be invalid, and the jamming and clamping stagnation faults of the transmission mechanism of the rotor lead screw and the axial spline nut are forced to be relieved, so that the axial spline cylinder and the front lug are in a floating state.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the technical scheme of the electromechanical actuator for forced unlocking under the fuzzy jamming fault of the transmission mechanism, the problem that the electromechanical actuator of the ball screw can be isolated from the fault by using the output torque of the servo motor after jamming or jamming is solved, the safety of the actuator after the fault is realized, and meanwhile, the electromechanical actuator can work after the fault by using the cooperation of the two linear displacement sensors again.

(2) According to the technical scheme for forcibly unlocking the electromechanical actuator under the condition of the fuzzy jamming fault of the transmission mechanism, the power switching in two directions is realized by utilizing the bidirectional control electromagnetic brake, the requirement of the electromechanical actuator on high power density is met, and the weight and the volume cannot be obviously increased.

(3) The technical scheme of the electromechanical actuator for forcibly unlocking the fuzzy jamming fault of the transmission mechanism provided by the invention solves the problem that the roller or the ball screw possibly has jamming and false jamming, and can forcibly remove and isolate the fault.

(4) The technical scheme of the electromechanical actuator for forcibly unlocking the fuzzy jamming fault of the transmission mechanism skillfully utilizes the characteristic of large torque output of the servo motor, adopts a common power source to forcibly remove jamming and jamming points, and can be borrowed into other actuators.

(5) The technical scheme of the electromechanical actuator for forced unlocking of the fuzzy jamming fault of the transmission mechanism can be expanded and applied to the technical field of high-reliability and high-safety actuation, such as a main flight control surface of a civil passenger aircraft, an auxiliary flight control surface of a fighter aircraft, engine thrust vector control, a flight control surface of a repeatedly-usable aircraft which can reciprocate heaven and earth, and the like, and has wider application prospect.

Drawings

FIG. 1 is a structural diagram of internal components of an electromechanical actuator for forcibly unlocking a transmission mechanism in case of fuzzy jamming failure, according to an embodiment of the present invention;

FIG. 2 is an internal cross-sectional view of an axially splined carrier assembly according to an embodiment of the present invention;

FIG. 3 is an internal cross-sectional view of a bi-directional electromagnetic brake assembly provided by an embodiment of the present invention;

FIG. 4 is a schematic external view of an axial spline housing provided in accordance with an embodiment of the present invention;

fig. 5 is an external view of an axially splined nut according to an embodiment of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Aiming at the condition that the fuzzy condition of clamping stagnation and clamping plug cannot be relieved by the prior technical scheme, the invention provides an electromechanical actuator for forcibly unlocking the fuzzy clamping plug fault of a transmission mechanism, which mainly comprises: the device comprises a bidirectional electromagnetic braking assembly, a circumferential rotating shell assembly, an axial spline bearing assembly and an electromechanical actuator assembly;

the electromechanical actuator assembly, the bidirectional electromagnetic brake assembly, the circumferential rotating shell assembly and the axial spline bearing assembly are sequentially arranged on the same axis, the axial spline bearing assembly is arranged inside the circumferential rotating shell assembly to form reciprocating linear motion, and the axial spline bearing assembly is connected with an output rotating shaft of the electromechanical actuator assembly to form a spiral transmission pair; the bidirectional electromagnetic braking assembly simultaneously generates radial and axial suction forces through active power-on control, so that the circumferential rotating shell assembly is disconnected from the fixed connection with the electromechanical actuator assembly to make a rotating motion, the connection between the axial spline bearing assembly and the electromechanical actuator assembly is forced to fail, and the jamming or clamping stagnation faults of a rotor screw rod in the electromechanical actuator assembly and a transmission mechanism of the axial spline bearing assembly are forced to be relieved.

As shown in fig. 1, the bi-directional electromagnetic brake assembly of the present invention includes: the magnetic rotor comprises an axial magnetic rotor 1, a floating magnetic stator 2, an electromagnetic coil stator 3, a spring 4, a fixing screw 5 and a magnetic steel ball 6; the circumferentially rotatable housing assembly comprises: a circumferential rotary bearing seat 7 and an actuator housing 12; the axial spline carrier assembly includes: an axial spline nut 10 and an axial spline barrel 11; an electromechanical actuator assembly comprising: the screw rod supporting bearing 8, the rotor screw rod 9, the front end cover 13, the front support lug 14, the servo motor 15 and the rear support lug 16.

An electromagnetic coil stator 3 of the bidirectional electromagnetic braking assembly is fixed on a circumferential rotating bearing seat 7, and an axial magnetic rotor 1 is fixed on a rotor screw rod 9;

as shown in fig. 3, when active power-on control is performed, the electromagnetic coil stator 3 axially attracts the floating magnetic stator 2 and the axial magnetic rotor 1, so that the magnetic stator 2, the axial magnetic rotor 1 and the rotor lead screw 9 are fixedly connected into a whole; the electromagnetic coil stator 3 is radially attracted with the magnetic steel ball 6, the steel ball 6 compresses the spring 4 to enter the groove where the circumferential rotating bearing seat 7 is located, so that the circumferential rotating bearing seat 7 is disconnected from the revolving connection with the shell of the servo motor 15, and the fixing screw 5 limits the outward movement of the steel ball 6, so that the spring 4 always forms a prepressing state;

as shown in fig. 2, the axial spline nut 10 and the rotor lead screw 9 are installed on the same axis, and when the rotor lead screw 9 rotates in a fixed axis manner, the axial spline nut 10 makes a linear motion through screw transmission; the circumferential rotating bearing block 7 supports the bearing of the rotor screw rod 9 to rotate;

the outer circumference of the axial spline nut 10 is provided with a convex spline which is axially connected with a circumferential inner spline groove of the axial spline barrel 11; the axial spline barrel 11 is connected with the front lug 14 into a whole in a threaded manner and is used for being installed with an external rack; the screw rod supporting bearing 8, the rotor screw rod 9, the actuator shell 12, the front end cover 13, the front support lug 14, the servo motor 15 and the rear support lug 16 are sequentially arranged on the same axis.

The relative rotation between the circumferential rotation bearing seat 7 and the rotor screw 9 is connected by a screw support bearing 8.

As shown in fig. 4 and 5, the raised splines arranged at the middle section of the outer side surface of the axial spline nut 10 are rectangular splines, and when the axial spline nut 10 and the rotor screw 9 are normally engaged for transmission, a plurality of rectangular splines at the middle section of the outer side surface of the axial spline nut 10 are in fit connection with spline grooves arranged on the inner wall of the axial spline cylinder 11, so that the axial spline nut and the rotor screw can only do axial reciprocating movement.

When the axial spline cylinder 11 is driven to rotate by the actuator housing 12, the rectangular splines on the axial spline nut 10 are disconnected from the spline grooves on the inner side of the axial spline cylinder 11.

When the axial spline nut 10 and the rotor screw 9 are jammed or stuck, the bidirectional electromagnetic brake assembly is actively electrified and controlled, and the actuator shell 12 drives the axial spline cylinder 11 to rotate for a certain angle, so that the axial spline cylinder 11 and the axial spline nut 10 are forced to be disconnected from axial connection.

As shown in fig. 4 and 5, a convex square block is arranged outside the axial spline nut 10 and reciprocates in a sliding groove of the actuator housing 12; the height of the raised square block is greater than the height of the raised spline provided on the outside of the axial spline nut 10.

The side face of the axial spline cylinder 11 is provided with a fan-shaped notch for avoiding the geometric interference of a convex square block arranged on the axial spline nut 10.

Preferably, the electromechanical actuator assembly further comprises a linear displacement sensor, and when the linear displacement sensor of the electromechanical actuator assembly feeds back that the rotation distance of the ball screw pair is inconsistent with the linear displacement distance, the occurrence of jamming, clamping stagnation or loosening faults is judged.

The working principle is as follows:

when the linear displacement sensing feedback ball screw pair of the electromechanical actuator is inconsistent in rotation and linear displacement distance, faults of jamming, clamping stagnation, loosening and the like are judged. Then, the bidirectional electromagnetic brake component is actively electrified and controlled, at the moment, the electromagnetic coil stator is axially attracted with the floating magnetic stator 2 and the axial magnetic rotor 1, so that the magnetic stator 2, the axial magnetic rotor 1 and the rotor lead screw 9 are fixedly connected into a whole; the electromagnetic coil stator radially attracts a magnetic steel ball 6, a compression spring 4 of the steel ball 6 enters a groove formed in the circumferential rotating bearing seat 7, the circumferential rotating bearing seat 7 is connected with a shell of a servo motor 15 in a disengaging mode, an actuator shell 12 drives an axial spline cylinder 11 to rotate for a certain angle, the axial spline cylinder 11 is forced to disengage from an axial spline nut 10 in an axial connection mode, further the connection effect of an axial spline bearing assembly is forced to fail, the transmission mechanism jam and clamping stagnation faults of a rotor lead screw 9 and the axial spline nut 10 are forced to be relieved, and therefore the axial spline cylinder 11 and a front lug 14 are enabled to be in a floating state.

Example (b):

according to the implementation scheme of the electromechanical actuator for forced unlocking of the fuzzy jamming fault of the transmission mechanism, when the linear thrust of the actuator reaches 30kN, the unlocking torque of a servo motor is not less than 20Nm, the diameter of a steel ball is not less than 5mm, the suction force of an axial electromagnetic brake is not less than 20Nm, and the suction force of a radial electromagnetic brake is not less than 5 Nm.

The invention is not described in detail and is within the knowledge of a person skilled in the art.