Car door lock
By using a double-slide linkage structure and a lock pin drive mechanism based on the energy storage and release principle of a return spring, combined with an electromagnetic lock assembly, the locking device of the electric tricycle door lock has been optimized, solving the problems of unstable locking and unsmooth operation, and achieving a highly efficient, stable and safe locking effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-04-10
AI Technical Summary
Existing electric tricycle door locks have deficiencies in locking stability and linkage mechanisms, resulting in insecure locking and awkward operation, which increases the risk of vehicle theft and accidental opening of the door.
The locking pin drive mechanism, which adopts a double-slide linkage structure and a return spring energy storage-release principle, combined with an electromagnetic lock assembly, achieves efficient conversion from handle rotation to linear locking pin movement. Furthermore, the transmission is optimized through non-contact clearance fit and inclined guide structure, enhancing locking accuracy and security.
It improves the smoothness and stability of lock operation, reduces component wear, enhances the safety and reliability of locking, and provides redundant operation with both mechanical and electromagnetic dual control to ensure controllability in emergency situations.
Smart Images
Figure CN224107096U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of door lock, especially relates to a door lock suitable for electric tricycle. BACKGROUND
[0002] As a convenient and practical traffic tool, electric tricycles have been widely used in daily life and logistics transportation fields. However, the existing electric tricycle door lock has many deficiencies in performance and safety, which is difficult to meet the growing needs of users.
[0003] In the locking structure, the locking device of the traditional electric tricycle door lock is designed simply, and the movement of the lock pin is often not stable, which is easy to cause jamming or inaccurate positioning. This not only affects the normal use of the door lock, but also may cause the door to be unable to lock firmly, increasing the risk of vehicle theft or accidental opening of the door during driving.
[0004] In the linkage mechanism of the handle and the locking device, the transmission component structure of the existing door lock is not reasonable, and the transmission efficiency is low. When the handle is rotated, it is difficult to efficiently and accurately convert the rotary motion into linear motion of the lock pin, resulting in that the unlocking and locking operation is not smooth, and the user needs to exert a large force to complete the operation, which brings inconvenience to the user.
[0005] In summary, the existing electric tricycle door lock has obvious defects in locking stability and linkage mechanism. Therefore, it is necessary to develop a new type of electric tricycle door lock to improve the performance and safety of the door lock and meet the needs of the market and users. UTILITY MODEL CONTENT
[0006] In view of the problems existing in the prior art, the utility model provides a door lock for improving the performance of the door lock.
[0007] The utility model discloses a kind of vehicle door locks, including lock body, the lock body is used to connect door and is equipped with lock cylinder installation part, abutting lock cylinder installation part is equipped with plug-in slot;Handle is rotatably arranged in the outside of lock body, the hinged end of the handle is hinged with lock body by swivel pin;And locking device is arranged in the inside of lock body, the locking device is formed with handle drive connection;Its characterized in that: the handle other end is equipped with linkage protruding block inserted into plug-in slot, and anti-interference structure is equipped between linkage protruding block and plug-in slot;Locking portion is equipped with linkage protruding block corresponding lock cylinder side;The locking device includes lock pin drive mechanism and transmission mechanism;Lock pin drive mechanism includes lock pin that makes linear motion along predetermined track, the first end of the lock pin is equipped with lock bolt for cooperating with door frame, and second end is formed with drive connection part;Transmission mechanism converts the rotary motion of the handle into the linear motion of lock pin, and includes transmission component that is connected between linkage protruding block of handle and lock pin drive connection part;When the handle rotates outward around swivel pin axis, realizes unlocking by the motion transmission of transmission component, drive lock pin moves in retracting direction;When the handle resets, lock pin moves in extending direction and realizes locking.
[0008] Further preferably, non-contact gap fitting structure formed between linkage protruding block and guide wall, and / or inclined surface guide structure arranged on the movement track of linkage protruding block are included.
[0009] Further preferably, the transmission component includes transmission connection part, the middle part of the transmission connection part is rotatably connected with lock body by pin shaft, first linkage arm that extends into first sliding groove of handle linkage protruding block is arranged on the transmission connection part, and second linkage arm that is inserted into second sliding groove of lock pin is arranged on the second end of the transmission connection part;The first linkage arm abuts against the upper end inner wall of first sliding groove, and the second linkage arm abuts against the left end inner wall of second sliding groove.
[0010] Further preferably, anti-disengagement inclined surface is arranged on the end face where first sliding groove and first linkage arm abut against each other.
[0011] Further preferably, protrusion is arranged on the end face where second sliding groove and second linkage arm abut against each other, and the top end of the protrusion is circular arc transition surface.
[0012] Further preferably, the lock pin drive mechanism further includes lock pin housing fixed to the inside of lock body, horizontal guide groove is arranged in the inside of the lock pin housing;The lock pin is slidably arranged in the horizontal guide groove, and radial flange is arranged on the side of the lock pin close to transmission component;End cover is arranged on the end of the lock pin housing away from door frame, reset spring is sleeved on the lock pin between the end cover and radial flange;When the lock pin is retracted, the radial flange compresses reset spring to store energy, and when the handle is released, the reset spring pushes the lock pin to reset and extend.
[0013] Further preferably, a limiting slot is arranged on the lower surface of the lock pin near the end of the lock tongue, and a threaded mounting hole perpendicular to the movement direction of the lock pin is arranged on the bottom of the lock pin housing; a limiting pin is fixed in the threaded mounting hole by threaded cooperation, and the head of the limiting pin extends into the limiting slot of the lock pin upward; when the reset spring pushes the lock pin to extend to the locking position, the vertical inner wall near the lock tongue side of the limiting slot abuts against the side surface of the head of the limiting pin.
[0014] Further preferably, a long strip-shaped manual sliding groove parallel to the movement direction of the lock pin is arranged on the upper surface of the lock pin housing; a manual yoke is detachably mounted on the top of the lock pin by screws, and the manual yoke passes through the manual sliding groove and is exposed on the upper surface of the lock pin housing.
[0015] Further preferably, the manual yoke is an L-shaped manual yoke, which comprises a horizontally extended lock pin connecting part fixedly connected with the threaded hole of the top of the lock pin by screws, and a vertically upward bent operating handle part passing through the manual sliding groove and exposed on the upper surface of the lock pin housing; when the operating handle part is manually pushed, the operating handle part slides along the manual sliding groove and drives the lock pin to move linearly.
[0016] Further preferably, an electromagnetic lock assembly is fixedly installed on the inner side wall of the lock body, and the electromagnetic lock assembly comprises an electromagnet fixed horizontally in an electromagnet housing mounting cavity, a guide hole coaxially arranged with the electromagnet, a cylindrical electromagnetic lock pin slidingly arranged in the guide hole, and a lock pin hole matched with the electromagnetic lock pin arranged on the side of the linkage protrusion facing the electromagnetic lock assembly; when the electromagnet is powered off, the electromagnetic lock pin is inserted into the lock pin hole under the action of the magnetic force of the electromagnetic lock pin to realize mechanical locking; when the electromagnet is powered on, the electromagnetic lock pin is retracted to release the locking.
[0017] The utility model has the advantages and technical effects that the utility model vehicle door lock realizes multi-level technical effects through integrated design, and significantly improves the performance of the vehicle lock.
[0018] Motion conversion and transmission optimization
[0019] The transmission mechanism adopts a double sliding groove linkage structure, and the rotation motion of the handle is accurately converted into linear displacement of the lock pin through the abutting cooperation of the first linkage arm and the handle sliding groove and the limiting contact of the second linkage arm and the lock pin sliding groove. The anti-disengagement inclined surface and the arc protrusion design effectively disperse the motion impact force, the mechanical hard limit ensures the action stop point control, realizes the double promotion of transmission precision and component life.
[0020] Reset and limiting mechanism innovation
[0021] The lock pin driving mechanism utilizes the energy storage and release principle of a return spring, cooperates with the radial flange and the end cover limiting, guarantees the quick and stable extension of the lock pin, forms bidirectional constraint through the limiting groove and the vertical limiting pin, limits the axial end position of the lock pin, and improves the locking precision and long-term use stability.
[0022] Control redundancy and safety enhancement
[0023] The electromagnetic lock assembly realizes the electric control unlocking function, the electromagnetic lock pin is automatically inserted into the linkage protrusion lock pin hole to form mechanical locking when power is off, and the electromagnetic force drives the lock pin to retract to release the locking when power is on. The L-shaped manual yoke provides an emergency manual operation channel, ensures that the position of the lock pin is controllable in an emergency, and enhances the safety redundancy of the system.
[0024] Compact structure and reliability improvement
[0025] The overall design adopts non-contact gap cooperation and inclined surface guiding structure to reduce motion interference, the anti-interference structure prolongs the service life of components, the compact layout adapts to the limited space of the door, the rotary connection of the transmission components forms a stable fulcrum, and multidirectional force transmission ensures smooth feeling and operation stability.
[0026] The vehicle door lock realizes the fusion of efficiency, stability and safety of the lock through mechanical-electromagnetic dual-mode control, efficient motion conversion, precise limiting reset and redundant control design, and provides an innovative solution for the vehicle door lock. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 is a structural schematic diagram of the utility model;
[0028] Figures 2 to 4 is a three-dimensional structural schematic diagram of the utility model;
[0029] Figure 5 is an A-A sectional view in the figure;
[0030] Figure 6 is a structural schematic diagram of the embodiment 2 of the utility model;
[0031] Figure 7 is a schematic diagram of the internal structure of the embodiment 2 of the utility model.
[0032] In the figure, 1, lock body; 11, lock core mounting part; 12, plug-in slot; 13, lock core; 2, handle; 21, hinged end; 22, linkage protrusion; 23, locking part; 24, first sliding groove; 25, anti-falling inclined surface; 3, rotating pin; 4, locking device; 41, lock pin driving mechanism; 410, lock pin; 411, lock tongue; 412, driving connection part; 413, second sliding groove; 414, protrusion; 415, radial flange; 416, limiting groove; 417, long strip-shaped manual sliding groove; 42, transmission mechanism; 420, transmission part; 421, transmission connection part; 422, first linkage arm; 423, second linkage arm; 43, lock pin housing; 431, horizontal guide groove; 432, end cover; 433, threaded mounting hole; 44, return spring; 45, limiting pin; 46, manual shift fork; 461, lock pin connection part; 462, screw; 463, operation handle part; 5, electromagnetic lock assembly; 51, electromagnetic lock housing; 52, guide hole; 53, electromagnetic lock pin; 54, lock pin hole; 55, guide plate; 56, guide stand. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will combine with examples to make the utility model more detailed. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.
[0034] Example 1, please refer to Figures 1 to 5A vehicle door lock, comprising a lock body 1 for connecting a vehicle door and provided with a lock cylinder mounting portion 11, a plug-in slot 12 being provided adjacent to the lock cylinder mounting portion; a handle 2 rotatably arranged outside the lock body, a hinge end 21 of the handle being hingedly connected to the lock body via a hinge pin 3; and a locking device 4 arranged inside the lock body, the locking device being drivingly connected to the handle; the handle further comprising a linkage protrusion 22 arranged to be inserted into the plug-in slot, an anti-interference structure being arranged between the linkage protrusion and the plug-in slot; the anti-interference structure comprising a non-contact clearance fit structure formed between the linkage protrusion and a guide wall, and / or a slope guide structure arranged on a movement track of the linkage protrusion; the linkage protrusion being provided with a locking portion 23 corresponding to a lock cylinder 13 side; the locking device 4 comprising a lock pin driving mechanism 41 and a transmission mechanism 42; the lock pin driving mechanism 41 comprising a lock pin 410 linearly moving along a predetermined track, a first end of the lock pin being provided with a lock tongue 411 for cooperating with a door frame, and a second end of the lock pin being formed with a driving connection portion 412; the transmission mechanism 42 converting a rotary movement of the handle around the hinge pin 3 into a linear movement of the lock pin 410, and comprising a transmission component 420 drivingly connected between the linkage protrusion of the handle and the lock pin driving connection portion; when the handle is rotated outwardly around the hinge pin axis, the lock pin is driven to move in a retracting direction to realize unlocking through movement transmission of the transmission component; when the handle is reset, the lock pin is driven to move in an extending direction to realize locking.
[0035] When the handle is pulled to rotate outwardly around the hinge pin, the linkage protrusion moves accordingly. The transmission component in the transmission mechanism converts the rotary movement of the handle into the linear movement of the lock pin, so that the lock pin moves in the retracting direction, the lock tongue is separated from the door frame, and unlocking is realized. When the handle is reset, the transmission component moves reversely to drive the lock pin to move in the extending direction, the lock tongue cooperates with the door frame, and locking is realized. Meanwhile, the anti-interference structure between the linkage protrusion and the plug-in slot can avoid movement interference and ensure smooth operation.
[0036] The vehicle door lock has reasonable structure design and convenient operation. The driving connection between the handle and the locking device makes unlocking and locking actions easily completed. The cooperation of the lock pin driving mechanism and the transmission mechanism realizes efficient conversion from rotary movement to linear movement, and improves the reliability of the lock. The arrangement of the anti-interference structure reduces component wear and prolongs the service life of the lock. In addition, the overall structure is compact, which is conducive to installation in the limited space of the vehicle door, and provides an efficient and stable solution for vehicle door locks.
[0037] Further preferably, the transmission component 420 comprises a transmission connecting portion 421, a middle portion of the transmission connecting portion is rotationally connected with the lock body through a pin shaft, a first linkage arm 422 extending into the first sliding groove 24 of the handle linkage protrusion is arranged on the transmission connecting portion, and a second linkage arm 423 inserted into the second sliding groove 413 of the lock pin is arranged on the second end of the transmission connecting portion; the first linkage arm abuts against the upper end inner wall of the first sliding groove, and the second linkage arm abuts against the left end inner wall of the second sliding groove. The transmission component forms a stable fulcrum through the rotational connection of the transmission connecting portion and the lock body, and efficiently converts the rotary motion of the handle into the linear displacement of the lock pin. The abutting cooperation of the first linkage arm and the first sliding groove of the handle realizes accurate guidance of action transmission, and avoids transmission idle stroke; the limiting contact of the second linkage arm and the second sliding groove of the lock pin ensures the straightness of the lock tongue extension and retraction trajectory, and prevents motion deviation. The first and second double sliding groove linkage structures realize action stop point control through mechanical hard limiting, effectively disperse motion impact force while improving transmission accuracy, and reduce component wear. The overall structure realizes multidirectional force transmission in a compact space layout, which not only ensures the smooth feeling of handle operation, but also enhances the operation stability of the locking device.
[0038] Further preferably, an anti-disengagement inclined surface 25 is arranged on the end face where the first sliding groove and the first linkage arm abut against each other.
[0039] Further preferably, a protrusion 414 is arranged on the end face where the second sliding groove and the second linkage arm abut against each other, and the top end of the protrusion is a circular arc transition surface.
[0040] Further preferably, the lock pin driving mechanism 41 further comprises a lock pin housing 43 fixed to the inner side of the lock body, a horizontal guide groove 431 is arranged in the lock pin housing, the lock pin 410 is slidingly arranged in the horizontal guide groove, a radial flange 415 is arranged on the side of the lock pin close to the transmission component, an end cover 432 is arranged on the end of the lock pin housing away from the door frame, a return spring 44 is arranged on the lock pin between the end cover and the radial flange, when the lock pin is retracted, the radial flange compresses the return spring to store energy, and when the handle is released, the return spring pushes the lock pin to reset and extend. The lock pin driving mechanism realizes efficient resetting through the cooperation of the return spring and the radial flange. When the lock pin is retracted under the drive of the transmission component, the radial flange compresses the return spring to store energy; after the operation force is released, the spring elastic potential energy is released, and the lock pin is quickly reset and extended along the horizontal guide groove. Through the mechanical energy storage and release principle, this technical feature not only ensures the response speed of the lock pin action, but also uses the limiting design of the end cover and the flange to ensure the stable extension of the lock pin, buffer impact and prolong the service life, and realizes efficient and reliable operation of the door lock mechanism.
[0041] Further preferably, the lower surface of the lock pin 410 is provided with a limiting groove 416 close to the end of the lock tongue, and the bottom of the lock pin housing is provided with a threaded mounting hole 433 perpendicular to the movement direction of the lock pin; the limiting pin 45 is fixed in the threaded mounting hole by threaded cooperation, and the head portion thereof extends upward into the limiting groove 416 of the lock pin; when the reset spring pushes the lock pin to extend to the locking position, the vertical inner wall of the limiting groove close to the lock tongue side abuts against the side surface of the head portion of the limiting pin. This limiting structure realizes precise positioning through the abutment of the rectangular groove and the limiting pin. When the lock pin extends, the vertical inner wall of the rectangular groove of the lower surface of the lock pin abuts against the side surface of the head portion of the limiting pin tightly, and the vertical limiting pin of the threaded mounting hole forms bidirectional constraint. This technical feature not only limits the axial end position of the lock pin to ensure the locking accuracy, but also replaces the traditional friction limiting with mechanical limiting, significantly improves the position stability of the lock pin during long-term use, avoids the risk of limiting failure caused by repeated extension and contraction, and at the same time, the rectangular groove design facilitates machining and assembly, and enhances the reliability and durability of the overall structure.
[0042] Further preferably, the upper surface of the lock pin housing is provided with an elongated manual sliding groove 417 parallel to the movement direction of the lock pin; the top of the lock pin is detachably provided with a manual yoke 46 by screws, and the manual yoke passes through the manual sliding groove and is exposed on the upper surface of the lock pin housing. Further preferably, the manual yoke 46 is an L-shaped manual yoke, which includes a horizontally extended lock pin connecting portion 461 fixedly connected with the threaded hole of the top of the lock pin by screws 462, a vertically upward bent operating handle portion 463 passing through the manual sliding groove and exposed on the upper surface of the lock pin housing, and when the operating handle portion is manually pushed, the operating handle portion slides along the manual sliding groove and drives the lock pin to move linearly. The manual yoke realizes manual control of the lock pin through the elongated sliding groove, and provides emergency operation redundancy. This technical feature enables the lock pin to manually overcome the spring force to extend and retract, enhances the use flexibility, facilitates debugging and maintenance, and at the same time ensures that the position of the lock pin is controllable in emergency situations.
[0043] Embodiment 2, please refer to the drawings and Figure 7An electromagnetic lock assembly 5 is fixedly installed on the inner side wall of the lock body, and the electromagnetic lock assembly comprises: an electromagnet horizontally fixed in an electromagnet housing 51 installation cavity; a guide hole 52 coaxially arranged with the electromagnet; a cylindrical electromagnetic lock pin 53 slidingly arranged in the guide hole; a lock pin hole 54 matching the electromagnetic lock pin is formed on one side of the linkage protrusion towards the electromagnetic lock assembly; when the electromagnet is powered off, the electromagnetic lock pin is inserted into the lock pin hole under the action of the electromagnetic lock pin magnetic force to achieve mechanical locking; when the electromagnet is powered on, the electromagnetic lock pin is retracted to release the locking. The electromagnetic lock assembly is remotely unlocked through electric control. When the electromagnet is powered off, the lock pin is inserted into the lock pin hole of the linkage protrusion under the action of the magnetic force to form mechanical locking; when the electromagnet is powered on, the electromagnetic force overcomes the spring force inside the electromagnetic lock housing to make the lock pin retract to release the locking. In order to ensure that the cylindrical electromagnetic lock pin 53 moves linearly, a guide plate 55 and a guide vertical plate 56 are further arranged at the rear end of the cylindrical electromagnetic lock pin 53 and cooperate with each other. The technical feature combines electromagnetic control and mechanical limiting, can realize quick unlocking through electric control, retains the reliability of mechanical locking, improves the system safety and operation convenience, reduces manual intervention, and prolongs the service life.
[0044] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A car door lock, comprising a lock body for connecting to a car door and having a lock cylinder mounting portion, wherein an insertion slot is provided adjacent to the lock cylinder mounting portion; a handle rotatably disposed on the outside of the lock body, wherein the hinge end of the handle is hinged to the lock body via a pivot pin; and a locking device disposed on the inside of the lock body, wherein the locking device is drivenly connected to the handle; characterized in that: The handle is provided with a linkage protrusion inserted into the insertion slot, and an anti-interference structure is arranged between the linkage protrusion and the insertion slot; the linkage protrusion is provided with a locking portion corresponding to the side of the lock cylinder; the locking device comprises a lock pin driving mechanism and a transmission mechanism; The lock pin driving mechanism comprises a lock pin moving linearly along a predetermined track, the first end of the lock pin is provided with a lock tongue for cooperating with the door frame, and the second end is formed with a driving connection portion; The transmission mechanism converts the rotary motion of the handle into the linear motion of the lock pin, and comprises a transmission component connected between the linkage protrusion of the handle and the driving connection portion of the lock pin; When the handle rotates outwardly around the rotation pin axis, the lock pin is driven to move in the retracting direction to realize unlocking through the motion transmission of the transmission component; when the handle is reset, the lock pin moves in the extending direction to realize locking.
2. The door lock according to claim 1, characterized in that: The non-contact gap cooperation structure is formed between the linkage protrusion and the guide wall, and / or the inclined surface guide structure is arranged on the motion track of the linkage protrusion.
3. The vehicle door lock according to claim 1, characterized in that: The transmission component comprises a transmission connection portion, the middle portion of the transmission connection portion is rotationally connected to the lock body through a pin shaft, the transmission connection portion is provided with a first linkage arm inserted into the first sliding groove of the handle linkage protrusion, and the second end is provided with a second linkage arm inserted into the second sliding groove of the lock pin; the first linkage arm abuts against the upper end inner wall of the first sliding groove, and the second linkage arm abuts against the left end inner wall of the second sliding groove.
4. The door lock according to claim 3, characterized in that: An anti-disengagement inclined surface is arranged on the end face of the first sliding groove abutting against the first linkage arm.
5. The door lock of claim 3, wherein: A protrusion is arranged on the end face of the second sliding groove abutting against the second linkage arm, and the top end of the protrusion is a circular arc transition surface.
6. The door lock of claim 1, wherein: The lock pin driving mechanism further comprises a lock pin housing fixed to the inner side of the lock body, a horizontal guide groove is formed in the inside of the lock pin housing, the lock pin is slidably arranged in the horizontal guide groove, and a radial flange is arranged on the side of the lock pin close to the transmission component; an end cover is arranged at the end of the lock pin housing away from the door frame, a return spring is sleeved on the lock pin between the end cover and the radial flange; when the lock pin is retracted, the radial flange compresses the return spring to store energy, and when the handle is released, the return spring pushes the lock pin to reset and extend.
7. The door lock according to claim 6, characterized in that: A limiting groove is arranged on the lower surface of the lock pin close to the lock tongue end, a threaded mounting hole perpendicular to the motion direction of the lock pin is arranged on the bottom of the lock pin housing; a limiting pin is fixed in the threaded mounting hole through threaded cooperation, and the head of the limiting pin extends upward into the limiting groove of the lock pin; when the return spring pushes the lock pin to extend to the locking position, the vertical inner wall close to the lock tongue side of the limiting groove forms abutment limiting with the side surface of the head of the limiting pin.
8. The door lock of claim 6, wherein: A long strip-shaped manual sliding groove parallel to the motion direction of the lock pin is formed on the upper surface of the lock pin housing; a manual yoke is detachably installed on the top of the lock pin through a screw, the manual yoke passes through the manual sliding groove and is exposed on the upper surface of the lock pin housing.
9. The door lock of claim 8, wherein: The manual shifting fork is an L-shaped manual shifting fork, comprising a horizontally extended locking pin connecting part fixedly connected with a threaded hole at the top of the locking pin by a screw; a vertically upward bent operating handle part penetrating through the manual sliding groove and exposed on the upper surface of the locking pin shell; when the operating handle part is manually shifted, the operating handle part slides along the manual sliding groove and drives the locking pin to move linearly.
10. A door lock according to any one of claims 1 to 9, characterized in that: An electromagnetic lock assembly is fixedly installed on the inner side wall of the lock body, comprising an electromagnet horizontally fixed in an electromagnet shell mounting cavity; a guide hole coaxially arranged with the electromagnet; a cylindrical electromagnetic lock pin slidingly arranged in the guide hole; a lock pin hole matching the electromagnetic lock pin is formed on one side of the linkage protrusion towards the electromagnetic lock assembly; when the electromagnet is powered off, the electromagnetic lock pin is inserted into the lock pin hole under the action of the magnetic force to realize mechanical locking; when the electromagnet is powered on, the electromagnetic lock pin is retracted to release the locking.