Charging pile electronic lock

Abstract

The invention relates to an electronic lock of a charging pile, which is characterized in that a movable terminal and a static terminal are arranged on one side of a transmission rod, and a lug rotating along with the transmission rod is used for controlling the connection or disconnection of the movable terminal and the static terminal, so that the function of sending a locking or unlocking signal by a microswitch is realized, and the situation that the microswitch is used for sending a signal can be avoided; and meanwhile, the mounting flexibility of the static terminal and the movable terminal is higher, the static terminal and the movable terminal can be conveniently arranged in the charging pile electronic lock, the size of the charging pile electronic lock can be further reduced, the winding cost of the charging pile electronic lock is further reduced, and meanwhile the assembling flexibility of the charging pile electronic lock in the charging pile is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic locks, and in particular relates to an electronic lock for a charging pile. Background Art

[0002] Existing electronic locks for charging piles usually send out signals of electronic lock lock or unlock status through internal micro switches. However, the cost of micro switches is high and their performance is unstable. The fixed size limits the internal layout design of electronic locks for charging piles, resulting in a generally large structure of electronic locks for charging piles, making it difficult to further reduce costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a charging pile electronic lock with a compact internal structure and without using a micro switch, so as to solve the technical problem that the current charging pile electronic lock has a large volume and high cost due to the use of a micro switch.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an electronic lock for a charging pile, comprising a shell, a locking rod movably plugged into the shell, and a driving mechanism for driving the locking rod, wherein one end of the locking rod extends out of the shell and the other end is inserted into the shell, and the driving mechanism is arranged inside the shell. The driving mechanism drives the locking rod to extend and retract along its axial direction, and the driving mechanism comprises a driving motor and a transmission rod, the transmission rod is connected to the driving motor through a transmission pair, a cam is connected to the transmission rod, and a swing rod is connected to the end of the cam away from the transmission rod, the swing rod and the transmission rod are arranged parallel and apart, the locking rod is vertically arranged on one side of the transmission rod, and a slot opening in the direction of the transmission rod is opened at one end of the locking rod located in the shell, and the swing rod is inserted into the slot. When the transmission rod drives the swing rod to swing up and down through the cam, the swing rod The locking rod is driven to move axially back and forth. A U-shaped moving terminal is provided on the side of the transmission rod away from the locking rod. The two side walls of the moving terminal are arranged along the radial direction of the transmission rod. A protrusion is provided on the cam or the transmission rod. The protrusion rotates with the transmission rod. The rotation path of the protrusion interferes with the side wall of the moving terminal close to the transmission rod. When the protrusion rotates to interfere with the moving terminal, the moving terminal is pushed to elastically deform in the direction away from the transmission rod. A static terminal is provided on the side of the moving terminal close to the transmission rod. The static terminal is opposite to the top of the side wall of the moving terminal close to the transmission rod. When the transmission rod drives the locking rod to extend to a locked state or retract to an unlocked state, the protrusion abuts or separates from one side of the moving terminal, driving the moving terminal to disconnect or conduct with the static terminal. The moving terminal and the static terminal are respectively connected to the housing.

[0005] As a preferred solution, when the transmission rod drives the locking rod to extend, the protrusion abuts against one side of the moving terminal and pushes the moving terminal to separate from the static terminal. When the transmission rod drives the locking rod to retract, the protrusion separates from one side of the moving terminal, and the moving terminal abuts against the static terminal to become conductive under the action of its own elastic force.

[0006] As a preferred embodiment, a first worm is coaxially arranged on the output shaft of the driving motor, a first turbine is rotatably connected in the outer casing, the first turbine is meshed with the first worm, a second worm is coaxially arranged on one end of the first turbine, a second turbine meshed with the second worm is coaxially connected to one end of the transmission rod, and the other end of the transmission rod is rotatably connected to the outer casing.

[0007] As a preferred solution, one end of the transmission rod is driven by a driving motor, and the other end is coaxially connected to a transmission gear. A reset shaft is rotatably connected to the outer shell, and the reset shaft is arranged on one side of the transmission rod parallel to the transmission rod. One end of the reset shaft extends out of the outer shell and is connected to a reset handle. The other end of the reset shaft is located in the outer shell and is sleeved with a reset gear. The reset gear is meshed with the transmission gear. The reset gear can rotate within a limited angle relative to the reset shaft or cannot rotate relative to the reset shaft. When the reset handle is rotated, the reset handle drives the transmission rod to rotate through the reset shaft, the reset gear and the transmission gear, thereby driving the rocker arm and the locking rod to move.

[0008] As a preferred solution, the reset gear can rotate within a limited angle relative to the reset shaft, a groove extending circumferentially at a certain central angle is provided on the inner wall of the inner hole of the reset gear, and a toggle block plugged into the groove is provided on the outer wall of the reset shaft. The toggle block can swing back and forth in the groove along the circumference of the reset shaft.

[0009] As a preferred solution, the central angle of the groove is 30°-120°.

[0010] As a preferred solution, a sector-shaped area continuous in the circumference of the reset gear is a transmission area, teeth are arranged on the periphery of the transmission area, and the remaining sector-shaped areas are limit areas. The top radius of the area close to the teeth on the periphery of the limit area is not less than the top circle of the reset gear, and the central angle of the transmission area is equal to the rotation angle of the transmission rod.

[0011] The beneficial effects of the present invention are as follows: the present invention arranges a moving terminal and a static terminal on one side of the transmission rod, and uses a convex block that rotates with the transmission rod to control the conduction or disconnection of the moving terminal and the static terminal, so as to realize the function of sending a locking or unlocking signal by a micro switch, thereby avoiding the use of a micro switch to send a signal and reducing production costs. At the same time, the static terminal and the moving terminal have higher installation flexibility and are convenient for arrangement in the charging pile electronic lock, which can further reduce the volume of the charging pile electronic lock, further reduce the cost of the charging pile electronic lock, and improve the assembly flexibility of the charging pile electronic lock in the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 is an exploded view of the three-dimensional structure of Example 1; Figure 2 is a three-dimensional diagram of the overall structure of Example 1; Figure 3 is a three-dimensional diagram of the specific structure of the reset gear 18 described in Example 1; Figure 4 is a schematic diagram of the gear distribution structure of the reset gear 18 described in Example 1; Figure 1~Figure 4 In: 1. Housing; 2. Lock rod; 3. Drive motor; 4. Transmission rod; 5. Cam; 6. Rocker; 7. Slot; 8. Moving terminal; 9. Bump; 10. Static terminal; 11. First worm; 12. First turbine; 13. Second worm; 14. Second turbine; 15. Transmission gear; 16. Reset shaft; 17. Reset handle; 18. Reset gear; 19. Inner hole; 20. Groove; 21. Toggle block; 22. Transmission area; 23. Teeth; 24. Limit area. DETAILED DESCRIPTION

[0013] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1

[0014] like Figure 1~Figure 4The charging pile electronic lock shown comprises a shell 1, a lock rod 2 movably plugged into the shell 1, and a driving mechanism for driving the lock rod 2. One end of the lock rod 2 extends out of the shell 1 and the other end is inserted into the shell 1. The driving mechanism is arranged inside the shell 1. The driving mechanism drives the lock rod 2 to extend and retract along its axial direction. The driving mechanism comprises a driving motor 3 and a transmission rod 4. The transmission rod 4 is connected to the driving motor 3 through a transmission pair. A cam 5 is connected to the transmission rod 4. An end of the cam 5 away from the transmission rod 4 is connected to a swing rod 6. The swing rod 6 is arranged parallel to the transmission rod 4. The lock rod 2 is vertically arranged on one side of the transmission rod 4. A slot 7 opening in the direction of the transmission rod 4 is opened at one end of the lock rod 2 located in the shell 1. The swing rod 6 is inserted in the slot 7. When the transmission rod 4 drives the swing rod 6 to swing up and down through the cam 5, the swing rod 6 drives the lock rod 2 to move back and forth axially. When the lock rod 2 is extended, the charging gun head is locked, and when the lock rod 2 is retracted, the charging gun head is unlocked. A U-shaped moving terminal 8 is provided on the side of the transmission rod 4 away from the locking rod 2, and the two side walls of the moving terminal 8 are arranged along the radial direction of the transmission rod 4. A protrusion 9 is provided on the cam 5 or the transmission rod 4, and the protrusion 9 rotates with the transmission rod 4. The rotation path of the protrusion 9 interferes with the side wall of the moving terminal 8 close to the transmission rod 4. When the protrusion 9 rotates to interfere with the moving terminal 8, the moving terminal 8 is pushed to elastically deform in the direction away from the transmission rod 4. A static terminal 10 is provided on the side of the moving terminal 8 close to the transmission rod 4, and the static terminal 10 is opposite to the top of the side wall of the moving terminal 8 close to the transmission rod 4. In this embodiment, when the transmission rod 4 drives the locking rod 2 to extend to the locked state, the protrusion 9 abuts against one side of the moving terminal 8 and pushes the moving terminal 8 to separate from the static terminal 10. When the transmission rod 4 drives the locking rod 2 to retract, the protrusion 9 separates from one side of the moving terminal 8, and the moving terminal 8 abuts against the static terminal 10 under the action of its own elastic force to conduct.

[0015] The transmission rod 4 in this embodiment is a special-shaped structure. The part of the transmission rod 4 that is arranged opposite to the swing rod 6 is eccentrically arranged on one side of the transmission rod 4 and is arranged on both sides of the axis of the transmission rod 4 with the swing rod 6 to improve the dynamic balance of the transmission rod 4 and the swing rod 6 when they swing, and reduce the vibration of the charging pile electronic lock. The end of the transmission rod 4 away from the cam 5 is connected to the second turbine 14. The swing rod 6 is a hollow tubular structure to reduce the weight of the swing rod 6, save materials, reduce costs, and reduce the difficulty of adjusting the dynamic balance body. In order to improve the dynamic balance, the part that does not participate in the meshing can also be cut according to the actual swing angle of the second turbine 14, while further reducing the manufacturing cost.

[0016] The drive motor 3 in this embodiment is controlled by the controller of the charging pile, and the positive and negative electrodes of the drive motor are connected to the external drive circuit through the housing 1. This structure is a conventional technology in the charging pile electronic lock, and will not be described here. Please refer to the description of the drive motor connection method disclosed in the invention patent with patent number ZL 201920486949.5, "A new energy vehicle electronic lock with a mechanical unlocking device".

[0017] Both the moving terminal 8 and the static terminal 10 have one end extending outside the housing 1 and connected to the control circuit. When the moving terminal 8 is connected to the static terminal 10, the controller of the charging pile will receive a high level or a low level. When the moving terminal 8 is disconnected from the static terminal 10, the electrical signal received by the controller of the charging pile will change, thereby judging that the locking state of the electronic lock of the charging pile has changed. This control method is more common in charging piles and belongs to conventional technology. Only a brief description is given here to explain so that those skilled in the art can more easily understand the present invention.

[0018] According to the above technical solution, in practical applications, the connection and separation relationship between the static terminal 10 and the dynamic terminal 8 can also be reversed, for example, when the convex block 9 pushes the side wall of the dynamic terminal 8 to elastically deform, the dynamic terminal 8 and the static terminal 10 are in contact to achieve connection, and vice versa to achieve disconnection. This setting method belongs to equivalent replacement and falls within the protection scope of the present invention.

[0019] The specific structure of the transmission rod 4 and the drive motor 3 described in the above technical solution is that the output shaft of the drive motor 3 is coaxially provided with a first worm 11, and the housing 1 is rotatably connected with a first turbine 12, and the first turbine 12 is meshed with the first worm 11. A second worm 13 is coaxially provided at one end of the first turbine 12, and a second turbine 14 meshed with the second worm 13 is coaxially connected at one end of the transmission rod 4, and the other end of the transmission rod 4 is rotatably connected with the housing 1.

[0020] In this embodiment, one end of the transmission rod 4 is driven by the driving motor 3, and the other end is coaxially connected to a transmission gear 15. A reset shaft 16 is rotatably connected to the housing 1. The reset shaft 16 is arranged on one side of the transmission rod 4 in parallel with the transmission rod 4. One end of the reset shaft 16 extends out of the housing 1 and is connected to a reset handle 17. The other end of the reset shaft 16 is located in the housing 1 and is sleeved with a reset gear 18. The reset gear 18 is meshed with the transmission gear 15. The reset gear 18 can rotate within a limited angle relative to the reset shaft 16. A groove 20 extending circumferentially at a certain central angle is provided on the inner wall of the inner hole 19 of the reset gear 18. A toggle block 21 plugged into the groove 20 is provided on the outer wall of the reset shaft 16. The toggle block 21 can swing back and forth in the groove 20 along the circumference of the reset shaft 16.

[0021] When the reset handle 17 is rotated, the reset handle 17 drives the transmission rod 4 to rotate through the reset shaft 16, the reset gear 18 and the transmission gear 15, thereby driving the swing rod 6 and the locking rod 2 to move.

[0022] The purpose of providing the groove 20 is to prevent the reset shaft 16 and the reset handle 17 from always rotating along with the rotation of the transmission rod 4 .

[0023] Of course, in actual application, the user may also keep the reset shaft 16 and the reset gear 18 circumferentially fixed.

[0024] The central angle of the groove 20 in this embodiment is 30°-120°, and is preferably not less than the sum of the central angles corresponding to the swing angle of the transmission rod 4 and the length of the toggle block 21 in the circumferential direction of the reset gear 18 .

[0025] A circumferentially continuous sector-shaped area of ​​the transmission gear 15 is a transmission area 22, and teeth 23 are arranged on the periphery of the transmission area 22. The remaining sector-shaped areas are limit areas 24. The top radius of the area near the teeth 23 on the periphery of the limit area 24 is not less than the tooth top circle of the transmission gear 15, and the central angle of the transmission area 22 is equal to the rotation angle of the transmission rod 4.

[0026] The purpose of setting the limit area 24 is to limit the rotation range of the reset handle 17 by the transmission gear 15 to prevent the reset handle 17 from excessively rotating and causing the swing rod 6 to swing excessively and damage the lock rod 2 or disengage from the slot 7 on the lock rod 2.

[0027] The working process of the present invention is: Figure 1 The figure shows the unlocked state of the electronic lock of the charging pile. At this time, the moving terminal 8 abuts against the static terminal 10, causing the signal circuit to be connected, and sending an electrical signal representing the unlocked state to the controller of the charging pile. At this time, the controller of the charging gun will not connect the charging circuit. When a charging gun is inserted into the charging pile and is in place, the controller of the charging pile will receive a signal representing that the charging gun is in place through other detection devices, and will control the drive motor 3 to rotate. The drive motor 3 drives the transmission rod 4 to rotate through the transmission pair, and the transmission rod 4 drives the cam 5 to rotate. The cam 5 drives the swing rod 6 and the protrusion 9 to rotate synchronously. The swing rod 6 swings upward, driving the lock rod 2 to rise to lock the charging gun. At the same time, the protrusion 9 rotates toward the moving terminal 8. When the lock rod 2 rises to the locking hole inserted into the charging gun, the protrusion 9 abuts and pushes the moving terminal 8 to elastically deform in the direction away from the static terminal 10 and separate the moving terminal 8 from the static terminal 10. At this time, the signal circuit connected by the moving terminal 8 and the static terminal 10 is disconnected, and the controller of the charging pile receives another electrical signal indicating the locked state, and the controller connects the charging circuit according to the signal.

[0028] When charging is completed, the controller can reversely control the drive motor to unlock. After unlocking is completed, the dynamic terminal 8 and the static terminal 10 are restored to connection, and the controller cuts off the charging circuit.

[0029] When a fault occurs in the charging pile device and the controller cannot actively control the charging pile electronic lock to unlock, the user can drive the swing rod 6 to swing by turning the reset handle 17, thereby driving the lock rod 2 to retract and unlock, or drive the lock rod 2 to extend and lock.

[0030] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A charging pile electronic lock, comprising a housing (1), a locking rod (2) movably plugged into the housing (1), and a driving mechanism for driving the locking rod (2), wherein one end of the locking rod (2) extends out of the housing (1) and the other end is inserted into the housing (1), and the driving mechanism is arranged inside the housing (1), and the driving mechanism drives the locking rod (2) to extend and retract along its axial direction, characterized in that: The driving mechanism comprises a driving motor (3) and a transmission rod (4), the transmission rod (4) and the driving motor (3) being connected to each other via a transmission pair, a cam (5) being connected to the transmission rod (4), an end of the cam (5) away from the transmission rod (4) being connected to a swing rod (6), the swing rod (6) being arranged parallel to and apart from the transmission rod (4), the locking rod (2) being arranged vertically on one side of the transmission rod (4), one end of the locking rod (2) located in the housing (1) being provided with a slot (7) opening in the direction of the transmission rod (4), the swing rod (6) being inserted into the slot (7), when the transmission rod (4) drives the swing rod (6) to swing up and down via the cam (5), the swing rod (6) drives the locking rod (2) to move back and forth axially, and a U-shaped moving terminal (8) is arranged on the side of the transmission rod (4) away from the locking rod (2), the two side walls of the moving terminal (8) being arranged radially along the transmission rod (4). The cam (5) or the transmission rod (4) is provided with a protrusion (9), the protrusion (9) rotates with the transmission rod (4), the rotation path of the protrusion (9) interferes with the side wall of the moving terminal (8) close to the transmission rod (4), when the protrusion (9) rotates to interfere with the moving terminal (8), the moving terminal (8) is pushed to elastically deform in a direction away from the transmission rod (4), a static terminal (10) is provided on the side of the moving terminal (8) close to the transmission rod (4), the static terminal (10) is opposite to the top of the side wall of the moving terminal (8) close to the transmission rod (4), when the transmission rod (4) drives the locking rod (2) to extend to a locked state or retract to an unlocked state, the protrusion (9) abuts against or separates from one side of the moving terminal (8), driving the moving terminal (8) and the static terminal (10) to be disconnected or connected, and the moving terminal (8) and the static terminal (10) are respectively connected to the housing (1).

2. The charging pile electronic lock according to claim 1, characterized in that: When the transmission rod (4) drives the locking rod (2) to extend, the protrusion (9) abuts against one side of the movable terminal (8) and pushes the movable terminal (8) to separate from the static terminal (10); when the transmission rod (4) drives the locking rod (2) to retract, the protrusion (9) separates from one side of the movable terminal (8), and the movable terminal (8) abuts against the static terminal (10) to be conductive under the action of its own elastic force.

3. The charging pile electronic lock according to claim 1, characterized in that: A first worm (11) is coaxially arranged on the output shaft of the drive motor (3); a first turbine (12) is rotatably connected in the housing (1); the first turbine (12) meshes with the first worm (11); a second worm (13) is coaxially arranged at one end of the first turbine (12); a second turbine (14) meshes with the second worm (13) is coaxially connected to one end of the transmission rod (4); and the other end of the transmission rod (4) is rotatably connected to the housing (1).

4. The charging pile electronic lock according to claim 1, characterized in that: One end of the transmission rod (4) is driven by the driving motor (3), and the other end is coaxially connected to a transmission gear (15). A reset shaft (16) is rotatably connected to the housing (1). The reset shaft (16) is arranged on one side of the transmission rod (4) in parallel with the transmission rod (4). One end of the reset shaft (16) extends out of the housing (1) and is connected to a reset handle (17). The other end of the reset shaft (16) is located in the housing (1) and is sleeved with a reset gear (18). The reset gear (18) is meshed with the transmission gear (15). The reset gear (18) can rotate within a limited angle relative to the reset shaft (16) or cannot rotate relative to the reset shaft (16). When the reset handle (17) is rotated, the reset handle (17) drives the transmission rod (4) to rotate through the reset shaft (16), the reset gear (18) and the transmission gear (15), thereby driving the swing rod (6) and the lock rod (2) to move.

5. The charging pile electronic lock according to claim 4, characterized in that: The reset gear (18) can rotate within a limited angle relative to the reset shaft (16); a groove (20) extending circumferentially at a certain central angle is provided on the inner wall of the inner hole (19) of the reset gear (18); a toggle block (21) plugged into the groove (20) is provided on the outer wall of the reset shaft (16); the toggle block (21) can swing back and forth in the groove (20) along the circumference of the reset shaft (16).

6. The charging pile electronic lock according to claim 5, characterized in that: The central angle corresponding to the groove (20) is 30°-120°.

7. The charging pile electronic lock according to claim 4, characterized in that: A circumferentially continuous sector-shaped area of ​​the reset gear (18) is a transmission area (22), teeth (23) are arranged on the periphery of the transmission area (22), and the remaining sector-shaped areas are limit areas (24), the top radius of the area near the teeth (23) on the periphery of the limit area (24) is not less than the tooth top circle of the reset gear (18), and the center angle of the transmission area (22) is equal to the rotation angle of the transmission rod (4).

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