An electric locking mechanism

Abstract

This invention discloses an electric locking mechanism, comprising a housing, a motor triggering assembly, a locking assembly, a turntable assembly, a bearing, a split nut assembly, and a connecting bolt. When the motor is energized, it drives a rocker arm to rotate at a certain angle, causing the rocker arm to move away from the rocker arm and releasing the mechanical constraint on the rocker arm assembly. A ratchet on the upper surface of the turntable assembly, through a locking tooth, flips the rocker arm assembly upwards, disengaging the locking tooth from the ratchet. After the constraint is removed, the turntable assembly rotates rapidly clockwise, causing the split nuts in the split nut assembly to gradually change from a locked, tightly closed state to an open state, releasing the connecting bolt and unlocking the electric locking mechanism. This mechanism can be reset and reused after unlocking. The unlocking configuration, which uses a "rotation" method to disengage the contact, avoids the influence of surface wear on the unlocking resistance, exhibits strong adaptability to vibration environments, high unlocking margin, and higher unlocking reliability, while also making the reset operation simpler and more convenient.

Description

Technical Field

[0001] This invention belongs to the field of aerospace locking and releasing technology, and relates to an electric locking mechanism. Background Technology

[0002] Locking mechanisms are essential in aerospace applications, including inter-module connection and separation, satellite-rocket connection and separation, fairing connection and separation, and solar panel clamping and release. These mechanisms generally require high reliability, strong adaptability to vibration, shock, and other mechanical environments, reliable connection during locking, and rapid release during unlocking. A common locking mechanism is a pin / pull-out type. During ground preparation, the locking pin is manually inserted into the pin hole, mechanically limiting its position and achieving the locking function. Upon receiving a release signal, pneumatic or electric actuators first release the mechanical limit of the locking pin, and the pin is then pulled out of the pin hole under the action of a pull-out spring, achieving the unlocking function. During space launches, engine combustion jets and high-Mach-number air vibrations generate high-energy, high-frequency vibrations and impacts on the spacecraft. Locking mechanisms using this locking method experience significant wear on the contact surface between the locking pin and the pin hole. In severe cases, this can even lead to metal adhesion between the locking pin and the pin hole, increasing resistance during pin removal. If this resistance exceeds the elastic force provided by the pin-pulling spring, it can result in the inability to unlock, reducing launch reliability. Furthermore, when resetting a pin-type locking mechanism, a reset fixture is required to assist in re-inserting the pin into the pin hole, and manual verification of pin hole alignment is necessary, making the operation complex and unreliable. Traditional locking mechanisms commonly use a pin-type configuration, where the pin and pin hole are generally in surface contact and require a "sliding" motion to disengage. This makes them highly sensitive to the surface quality and coefficient of friction of the contact surface. Especially after the locking mechanism experiences harsh mechanical environments such as high-frequency vibrations, significant wear occurs on the contact surface, increasing frictional resistance and reducing the operational reliability of the locking mechanism. In severe cases, it can even cause metal to stick together on the contact surface, making the frictional resistance exceed the unlocking force, thus preventing the mechanism from unlocking. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide an electric locking mechanism with high reliability, strong adaptability to mechanical environment, and convenient reset. It has high unlocking reliability and convenient reset operation without the need for additional reset tooling.

[0004] The technical solution of this invention is: an electric locking mechanism, comprising: a housing, a motor triggering assembly, a locking assembly, a turntable assembly, a bearing, a split nut assembly, and a connecting bolt; the motor triggering assembly, the locking assembly, and the split nut assembly are directly fixed to the housing, the turntable assembly is fixed to the housing via the bearing, and the connecting bolt can be screwed into the split nut assembly; when the electric locking mechanism is in the locked state, the motor triggering assembly contacts and presses against the locking assembly, preventing the locking assembly from flipping up, thus achieving continuous locking of the turntable assembly; the turntable assembly further maintains the split nuts in the split nut assembly in a tightly closed state; the connecting bolt is screwed into the split nuts, and a bolt preload is applied to achieve the locking function.

[0005] The shell is a hollow cylindrical shell structure.

[0006] The motor triggering assembly includes a motor, a motor base, and a rocker arm. The motor base is fixed to the housing of the electric locking mechanism by fasteners. The motor is mounted on the motor base, and the output end of the motor is connected to the rocker arm, which can rotate synchronously with the output shaft of the motor. In the locked state, the rocker arm is located directly above the locking assembly and presses against the locking assembly, thereby limiting the locking assembly and preventing it from flipping up.

[0007] The locking assembly includes a swing arm, a locking tooth, a swing arm return torsion spring, a locking tooth return torsion spring, and a central pin. The central pin passes through the housing and is fixed to the housing by a thread at one end. The swing arm return torsion spring is fitted onto the central pin, with one end fixed to the housing and the other end fixed to the swing arm. When the swing arm rotates upward around the central pin, it applies an elastic force to the swing arm return torsion spring and stores the elastic potential energy within the spring. The locking tooth has a toothed structure, is coaxially mounted with the swing arm, and provides unidirectional limitation for the swing arm; that is, the locking tooth can only rotate around the central pin. The central axis of the swing arm rotates counterclockwise; when the locking tooth rotates clockwise, it drives the swing arm to rotate clockwise synchronously; the locking tooth return torsion spring is mounted on the central pin, with one end fixed to the swing arm and the other end fixed to the locking tooth; when the locking tooth rotates counterclockwise around the central pin, it will apply an elastic force to the locking tooth return torsion spring and store the elastic potential energy in the locking tooth return torsion spring; there is a protrusion facing the housing side at the middle position of the swing arm, which contacts and is pressed against the swing rod, and the upward movement of the swing arm will be mechanically limited by the swing rod.

[0008] The turntable assembly is a rotating body that can rotate around the center of the housing along with the bearing; the upper end face of the turntable assembly has ratchet teeth distributed in the circumferential direction for engaging with locking teeth; when the locking teeth engage with the ratchet teeth, the turntable assembly is limited and cannot rotate; when the locking teeth disengage from the ratchet teeth, the turntable assembly is released from the limit and can rotate around the center of the housing.

[0009] The segmented nut assembly is formed by dividing a complete nut into multiple segments along the axial direction, creating multiple segmented nuts. After each segmented nut recloses into a single nut, the mating bolt can be screwed in and a bolt preload can be applied. When each segmented nut separates, it disengages from the mating bolt and releases the mating bolt.

[0010] The multi-lobed structure can be three or four lobes.

[0011] The unlocking process of the electric locking mechanism is as follows: First, the motor is powered on and rotated, causing the swing arm to rotate at a certain angle, so that the swing arm moves away from the protrusion and releases the mechanical limit on the swing arm; at this time, the ratchet on the upper end face of the turntable assembly flips the locking assembly upward through the locking teeth, so that the locking teeth disengage from the ratchet; after the limit is lost, the turntable assembly will rotate clockwise, causing the segmented nuts in the segmented nut assembly to gradually change from the tight state when locked to the open state, and release the connecting bolts, thereby unlocking the electric locking mechanism.

[0012] After the electric locking mechanism is unlocked, it can be reset and locked again, as follows:

[0013] When unlocking, when the locking component is pushed upward, it will apply an elastic force to the swing arm return torsion spring and store the elastic potential energy in the torsion spring; after unlocking, the locking component will automatically flip back under the action of the elastic potential energy stored in the swing arm return torsion spring, so that the locking teeth re-engage with the ratchet teeth, and the locking component will automatically return to the initial locked state.

[0014] Power on the motor to continue rotating, causing the swing arm to rotate again to the protrusion on the swing arm, thus reapplying mechanical limit to the swing arm;

[0015] Manually rotating the turntable assembly counterclockwise causes the ratchet to push the locking tooth to swing counterclockwise at a certain angle, disengaging it from the locking tooth and applying an elastic force to the locking tooth return torsion spring, storing the elastic potential energy within the spring. Once the turntable assembly has rotated counterclockwise to its final position, the segmented nuts in the segmented nut assembly will return to their tightened state, merging into a single complete nut. The mating bolt can then be screwed back into the segmented nut, and a bolt preload can be applied. Simultaneously, the locking tooth will automatically flip back under the elastic potential energy stored in the locking tooth return torsion spring, re-engaging with the ratchet on the turntable assembly, achieving a complete reset.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1) A ratchet locking / unlocking mechanism configuration was designed. During unlocking, the contact surface between the locking teeth and the ratchet teeth on the turntable disengages through rotation. When the mechanism unlocks, the motion pair first rotates under the unlocking force, disengaging from the large-area contact, thus avoiding the influence of surface wear on unlocking resistance. This achieves strong environmental adaptability of the locking mechanism and improves its unlocking reliability. Even after experiencing severe wear damage on the surface due to harsh mechanical environments such as high-frequency vibration, the locking mechanism can still effectively unlock.

[0018] 2) Compared to traditional insert / pull-out pin locking mechanisms, the ratio of sliding friction power to resistance during the unlocking process is difficult to increase within a limited space. The mechanism configuration adopted in this invention allows for a larger ratio of unlocking power arm to resistance arm within a limited space, resulting in higher unlocking margin and higher unlocking reliability.

[0019] 3) Compared to traditional insert / pull-out pin locking mechanisms, which require a reset tool to assist in re-inserting the pin after unlocking and necessitate manual verification of pin alignment, making the operation complex and unreliable, this invention utilizes a ratchet mechanism integrated into the unlocking mechanism. The ratchet transmits power during unlocking and automatically locks the turntable during reset. Reset is convenient without additional tooling or manual verification, resulting in a simpler, more convenient, and more reliable reset operation. Attached Figure Description

[0020] Figure 1 This is a diagram showing the composition of the electric locking mechanism of the present invention;

[0021] Figure 2 Diagram showing the components of the motor trigger assembly;

[0022] Figure 3 Diagram of the locking assembly (first view direction);

[0023] Figure 4 Diagram of the locking assembly (second view direction);

[0024] Figure 5 This is a schematic diagram showing the unlocked state of the electric locking mechanism. Detailed Implementation

[0025] Figure 1This is a schematic diagram of a highly reliable and environmentally adaptable electric locking mechanism with convenient rotary locking and reset. It includes a housing 1, a motor trigger assembly 2, a locking assembly 3, a rotary assembly 4, a bearing 5, a split nut connecting and bearing assembly 6, a connecting bolt 7, and the connected component 8. The housing 1 provides fixed support for the motor trigger assembly 2, locking assembly 3, rotary assembly 4, bearing 5, and split nut connecting and bearing assembly 6. When the electric locking mechanism is in the locked state, the motor trigger assembly 2 contacts and presses against the locking assembly 3, preventing the locking assembly 3 from flipping upwards. This achieves continuous locking of the rotary assembly 4. The rotary assembly 4 further maintains the split nuts in the split nut connecting and bearing assembly 6 in a tightly closed state. The connecting bolt 7 passes through the connected component 8 and can be screwed into the split nuts, applying a bolt preload, thus achieving the locking function of the connected component 8.

[0026] The motor triggering component 2 of the present invention is as follows Figure 2 As shown, it mainly includes a motor 2-1, a motor base 2-2, and a rocker arm 2-3. The motor base 2-2 can be fixed to the housing 1 of the electric locking mechanism with screws. The motor 2-1 is mounted on the motor base 2-2, and the output end 2-4 of the motor is connected to the rocker arm 2-3. The rocker arm 2-3 can rotate synchronously with the output shaft 2-4 of the motor. In the locked state, the bottom of the rocker arm 2-3 is located at the protrusion 3-2-1 of the rocker arm 3-2 in the locking assembly 3, thereby limiting the rocker arm 3-2 and preventing it from flipping upwards.

[0027] The locking component 3 of the present invention is as follows Figure 3 , Figure 4 As shown, it mainly includes a swing arm 3-2, a locking tooth 3-3, a swing arm return torsion spring 3-1, a locking tooth return torsion spring 3-5, and a central pin 3-4. The swing arm 3-2, locking tooth 3-3, swing arm return torsion spring 3-1, and locking tooth return torsion spring 3-5 are connected in series on the central pin 3-4 and can rotate around the central pin 3-4. The central pin 3-4 is located on the axis of symmetry of the circular cross-section of the housing and is fixed to the housing 1 of the electric locking mechanism by a threaded connection at its end. One end of the swing arm return torsion spring 3-1 is fixed to the swing arm 3-2, and the other end is fixed to the housing 1. When the swing arm flips upward around the central axis, it applies an elastic force to the swing arm return torsion spring and stores the elastic potential energy within the torsion spring. One end of the locking tooth return torsion spring 3-5 is fixed to the swing arm 3-2, and the other end is fixed to the locking tooth 3-3. When the locking tooth 3-3 rotates around the central axis, it will apply an elastic force to the locking tooth return torsion spring 3-5 and store the elastic potential energy in the torsion spring. The protrusion 3-2-1 on the swing arm 3-2 contacts the bottom of the swing rod 2-3, and its upward movement will be mechanically limited by the swing rod 2-3.

[0028] The turntable assembly 4 of the present invention is a rotating body, such as... Figure 3 , Figure 4As shown, a certain number of ratchet teeth are distributed circumferentially at the top, and the waist is fixed to the housing 1 by bearing 5, and can rotate around the center of the housing with bearing 5. Figure 3 , Figure 4 This indicates the locking state of the electric locking mechanism. Figure 3 When the turntable assembly 4 rotates clockwise, it pushes the segmented nut in the segmented nut connecting the bearing assembly 6 from a tightly closed state to an open state, thereby separating it from the connecting bolt 7, releasing the bolt preload of the connecting bolt 7, and realizing the separation function; when the turntable assembly 4 rotates counterclockwise, it pushes the segmented nut in the segmented nut connecting the bearing assembly 6 from an open state to a tightly closed state, merging into a complete nut, so that the connecting bolt 7 can be screwed into the segmented nut and apply bolt preload, realizing the connection function.

[0029] like Figure 3 , Figure 4 As shown, for the electric locking mechanism to be in the locked state, the turntable assembly 4 must remain stationary. At this time, a spring is installed inside the turntable assembly 4 and is in a compressed state. Under the action of the spring's elastic restoring force, the turntable assembly 4 is always subjected to a clockwise tangential rotational force F. This force is transmitted to the locking tooth 3-3 through the engagement of the ratchet teeth on the turntable. Because the turntable assembly 4 is limited by the locking tooth 3-3, the reaction force exerted by the locking tooth 3-3 on the turntable assembly 4 balances the aforementioned rotational force F, keeping the ratchet turntable assembly 4 stationary, i.e., maintaining the locked state.

[0030] The core principle of this electric locking mechanism is to keep the turntable assembly 4 stationary by using the motor trigger component 2 and the locking component 3. The mechanical solution employed is that the locking teeth 3-3 in the locking component 3 engage with the ratchet teeth 4-1 on the top of the turntable assembly 4, limiting the ratchet turntable assembly 4 to a clockwise position. This balances the clockwise rotational force F initially borne by the ratchet turntable, ensuring that the electric locking mechanism remains in a locked state.

[0031] The core principle of this electric locking mechanism for unlocking is as follows: First, the motor 2-1 is energized and rotated, causing the swing arm 2-3 to rotate at a certain angle, thus moving the swing arm 2-3 away from the protrusion 3-2-1 and releasing the mechanical limit on the swing arm 3-2. At this time, the ratchet on the turntable assembly 4, under the action of the clockwise rotational force F, will push the locking assembly 3 upward, causing the locking teeth 3-3 to disengage from the turntable ratchet. After losing the limit, the turntable assembly 4 will rotate rapidly clockwise, causing the split nut in the bearing assembly 6 to gradually change from the tightly closed state during locking to the open state, thereby separating from the connecting bolt 7, releasing the bolt preload of the connecting bolt 7, and realizing the unlocking of the electric locking mechanism. The unlocked state is as follows. Figure 5 As shown.

[0032] This electric locking mechanism can be reset and locked again after unlocking, making it reusable. The reset and locking process consists of the following three steps.

[0033] In the first step, when the locking assembly 3 is pushed upward in the locked state, an elastic force is applied to the swing arm return torsion spring 3-1, and the elastic potential energy is stored in the torsion spring. After the electric locking mechanism unlocks, the spring in the turntable assembly 4 returns to its free state, and the rotational force F on the turntable 4 disappears. At this time, the locking assembly 3 will automatically flip back under the action of the elastic potential energy stored in the swing arm return torsion spring 3-1, so that the locking teeth 3-3 re-engage with the turntable ratchet, and the locking assembly 3 returns to the initial locked state.

[0034] The second step is to power on motor 2-1 and let it continue to rotate, which will drive swing arm 2-3 to rotate again onto protrusion 3-2-1 of swing arm 3-2, and apply mechanical limit to swing arm 3-2 again.

[0035] Third, manually rotate turntable 4 counterclockwise. The ratchet on the turntable will push the locking tooth 3-3 to swing back a certain angle and disengage from the locking tooth 3-3 again. At the same time, the rotation of the turntable will gradually compress the spring in the turntable assembly 4, allowing the spring to store elastic force F again. After the turntable rotates counterclockwise to its final position, the split nuts in the split nut connecting the bearing assembly 6 also return to their tightened state, merging into a complete nut. This allows the mating bolt 7 to be screwed back into the split nut, applying bolt preload and realizing the reuse of the electric locking mechanism. When the locking tooth 3-3 swings back, it will apply elastic force to the locking tooth return torsion spring 3-5 and store elastic potential energy in the torsion spring. When the turntable rotates to its final position, the locking tooth 3-3 will automatically flip back under the action of the elastic potential energy stored in the locking tooth return torsion spring 3-5, allowing the locking tooth 3-3 to re-engage with the ratchet on the turntable 4, achieving complete reset.

[0036] The key features of this invention are: a highly reliable and environmentally adaptable electric locking mechanism based on a motor as the drive device; a ratchet-driven unlocking mechanism on a turntable that allows for "rotational disengagement" instead of "sliding disengagement"; and a self-resetting locking component. This mechanism facilitates convenient turntable locking and resetting. The locking mechanism uses a combination of locking teeth and turntable ratchet engagement for locking. During unlocking, the unlocking force on the turntable actively pushes the locking teeth to rotate, disengaging the engagement. This avoids the impact of surface wear on unlocking resistance, achieving strong environmental adaptability and improving unlocking reliability. Even after experiencing severe wear and damage from high-frequency vibrations or other harsh mechanical environments, the locking mechanism can still effectively unlock. Both the swing arm and locking teeth are connected to torsion springs, and neither torsion spring is under stress in the locked state. When unlocking, the torsion spring connected to the swing arm automatically applies torque, and after unlocking, it can automatically return to the locked state under the action of torque; when resetting, the torsion spring connected to the locking teeth passively applies torque, and after resetting, it can automatically return to the locked state under the action of torque; the entire reset operation can be easily reset without additional tooling, and there is no need for manual interpretation, making the operation simple, convenient, and more reliable.

[0037] (I) Unlocking process

[0038] Powering on motor 2-1 causes it to rotate, rotating rocker arm 2-3 by a certain angle. This moves rocker arm 2-3 away from protrusion 3-2-1, releasing the mechanical constraint on rocker arm 3-2. Subsequently, the turntable assembly rotates clockwise under the internal rotational force F, pushing locking assembly 3 upwards and disengaging locking teeth 3-3 from the turntable ratchet. The circumferentially unconstrained turntable rotates rapidly, causing the segmented nuts in the segmented nut connecting the bearing assembly 6 to open, releasing the mating bolt 7 and unlocking the electric locking mechanism.

[0039] (II) Reset and Locking Process

[0040] First, after the electric locking mechanism unlocks, the locking assembly 3 automatically flips back under the torque of the swing arm return torsion spring 3-1, causing the locking tooth 3-3 to re-engage with the ratchet of the turntable, and the locking assembly 3 returns to its initial locked state. Second, the motor 2-1 is energized and rotates, causing the swing arm 2-3 to rotate again onto the protrusion 3-2-1 of the swing arm 3-2, reapplying mechanical restraint to the swing arm 3-2. Finally, the turntable 4 is manually rotated counterclockwise. The ratchet on the turntable pushes the locking tooth 3-3 to swing back a certain angle and disengage from the locking tooth 3-3 again. The turntable 4 is continuously rotated until the split nut in the split nut connecting the bearing assembly 6 returns from the open state to the closed state. At this point, the turntable is stopped, and the locking tooth 3-3 automatically flips back under the torque of the locking tooth return torsion spring 3-5, causing the locking tooth 3-3 to re-engage with the ratchet on the turntable 4, keeping the split nut in the closed state, thus completing the entire reset operation.

[0041] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention based on the above-disclosed technical content without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. An electric locking mechanism, characterized in that, include: The components include a housing (1), a motor trigger assembly (2), a locking assembly (3), a turntable assembly (4), a bearing (5), a split nut assembly (6), and a connecting bolt (7). The motor trigger assembly (2), the locking assembly (3), and the split nut assembly (6) are directly fixed to the housing (1). The turntable assembly (4) is fixed to the housing (1) via the bearing (5). The connecting bolt (7) can be screwed into the split nut assembly (6). When the electric locking mechanism is in the locked state, the motor trigger assembly (2) contacts and presses the locking assembly (3), preventing the locking assembly (3) from flipping up and achieving continuous locking of the turntable assembly (4). The turntable assembly (4) further maintains the split nuts in the split nut assembly (6) in a tight state. The connecting bolt (7) is screwed into the split nuts and a bolt preload is applied to achieve the locking function. The locking assembly (3) includes a swing arm (3-2), a locking tooth (3-3), a swing arm return torsion spring (3-1), a locking tooth return torsion spring (3-5), and a central pin (3-4). The central pin (3-4) passes through the housing (1) and is fixed to the housing (1) by a thread at one end. The swing arm return torsion spring (3-1) is fitted onto the central pin (3-4), with one end fixed to the housing (1) and the other end fixed to the swing arm (3-2). When the swing arm (3-2) flips upward around the central pin (3-4), it applies an elastic force to the swing arm return torsion spring (3-1) and stores the elastic potential energy in the swing arm return torsion spring (3-1). The locking tooth (3-3) has a toothed structure, is coaxially mounted with the swing arm (3-2), and provides unidirectional limitation for the swing arm (3-2). That is, the locking tooth (3-3) only... It can rotate counterclockwise around the central axis of the swing arm (3-2); when the locking tooth (3-3) rotates clockwise, it drives the swing arm (3-2) to rotate clockwise synchronously; the locking tooth return torsion spring (3-5) is fitted on the central pin (3-4), one end is fixed on the swing arm (3-2), and the other end is fixed on the locking tooth (3-3); when the locking tooth (3-3) rotates counterclockwise around the central pin (3-4), it will apply an elastic force to the locking tooth return torsion spring (3-5) and store the elastic potential energy in the locking tooth return torsion spring (3-5); there is a protrusion (3-2-1) in the middle position of the swing arm (3-2) facing the housing (1), the protrusion (3-2-1) contacts the swing rod (2-3) and is pressed, and the upward movement of the swing arm (3-2) will be mechanically limited by the swing rod (2-3); The turntable assembly (4) is a rotating body that can rotate around the center of the housing (1) along with the bearing (5); the upper end face of the turntable assembly (4) is circumferentially distributed with ratchet teeth (4-1) for engaging with locking teeth (3-3); when the locking teeth (3-3) engage with the ratchet teeth (4-1), the turntable assembly (4) is limited and cannot rotate; when the locking teeth (3-3) disengage from the ratchet teeth (4-1), the turntable assembly (4) is released from its limited position and can rotate around the center of the housing (1); The motor triggering assembly (2) includes a motor (2-1), a motor base (2-2), and a rocker arm (2-3). The motor base (2-2) is fixed to the housing (1) of the electric locking mechanism by fasteners. The motor (2-1) is installed on the motor base (2-2). The output end (2-4) of the motor (2-1) is connected to the rocker arm (2-3). The rocker arm (2-3) can rotate synchronously with the output end (2-4) of the motor. In the locked state, the rocker arm (2-3) is located directly above the locking assembly (3) and presses against the locking assembly (3), thereby limiting the locking assembly (3) and preventing it from flipping up.

2. The electric locking mechanism according to claim 1, characterized in that, The shell (1) is a hollow cylindrical shell structure.

3. The electric locking mechanism according to claim 2, characterized in that, The segmented nut assembly (6) is formed by dividing a complete nut into multiple segments along the axial direction to form multiple segmented nuts. After each segmented nut is closed back into a nut, the mating bolt (7) is screwed in and a bolt preload is applied. When each segmented nut is separated, it disengages from the mating bolt (7) and releases the mating bolt (7).

4. The electric locking mechanism according to claim 3, characterized in that, The multi-lobed structure can be three or four lobes.

5. The electric locking mechanism according to claim 3, characterized in that, The unlocking process of the electric locking mechanism is as follows: First, the motor (2-1) is powered on and rotated, which drives the swing arm (2-3) to rotate at a certain angle, so that the swing arm (2-3) moves away from the protrusion (3-2-1) and releases the mechanical limit on the swing arm (3-2); at this time, the ratchet (4-1) on the upper end face of the turntable assembly (4) flips the locking assembly (3) upward through the locking tooth (3-3), so that the locking tooth (3-3) disengages from the ratchet (4-1); after the limit is lost, the turntable assembly (4) will rotate clockwise, which drives the split nut in the split nut assembly (6) to gradually change from the tight state when locked to the open state, and releases the connecting bolt (7), thereby realizing the unlocking of the electric locking mechanism.

6. The electric locking mechanism according to claim 3, characterized in that, After the electric locking mechanism is unlocked, it can be reset and locked again, as follows: When unlocking, when the locking assembly (3) is pushed up, it will apply an elastic force to the swing arm return torsion spring (3-1) and store the elastic potential energy in the torsion spring; after unlocking, the locking assembly (3) will automatically flip back under the action of the elastic potential energy stored in the swing arm return torsion spring (3-1), so that the locking tooth (3-3) re-engages with the ratchet tooth (4-1), and the locking assembly (3) automatically returns to the initial locked state; Power on the motor (2-1) and continue to rotate, causing the swing arm (2-3) to rotate again onto the protrusion (3-2-1) of the swing arm (3-2), thus reapplying mechanical limit to the swing arm (3-2); When the turntable assembly (4) is manually rotated counterclockwise, the ratchet (4-1) will push the locking tooth (3-3) to swing counterclockwise at a certain angle and disengage from the locking tooth (3-3) again, and apply an elastic force to the locking tooth reset torsion spring (3-5) and store the elastic potential energy in the torsion spring; when the turntable assembly (4) is rotated counterclockwise to the position, the split nuts in the split nut assembly (6) will return to the tight state and merge into a complete nut, and the connecting bolt (7) will be screwed into the split nut again and the bolt preload will be applied; at the same time, the locking tooth (3-3) will automatically flip back under the action of the elastic potential energy stored in the locking tooth reset torsion spring (3-5), so that the locking tooth (3-3) will re-engage with the ratchet (4-1) on the turntable assembly (4) to achieve complete reset.

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