Charging pile electronic lock

Abstract

The utility model 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 that a microswitch sends a locking or unlocking signal is realized, and the situation that the microswitch is used for sending the 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] This utility model belongs to the field of electronic lock technology, and specifically relates to an electronic lock for a charging pile. Background Technology

[0002] Existing charging station electronic locks typically use internal microswitches to signal whether the lock is locked or unlocked. However, microswitches are expensive and have unstable performance. Their fixed size limits the internal layout design of charging station electronic locks, resulting in generally large structures and making it difficult to further reduce costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a charging pile electronic lock with a compact internal structure that does not use micro switches, thereby solving the technical problems of large size and high cost caused by the use of micro switches in current charging pile electronic locks.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an electronic lock for charging piles, including a housing, a locking rod movably inserted into the housing, and a driving mechanism for driving the locking rod. One end of the locking rod extends out of the housing and the other end is inserted into the housing. The driving mechanism is located inside the housing and drives the locking rod to extend and retract along its axial direction. The driving mechanism includes a drive motor and a transmission rod. The transmission rod and the drive motor are connected by a transmission pair. A cam is connected to the transmission rod, and a rocker arm is connected to the end of the cam away from the transmission rod. The rocker arm is parallel to and separate from the transmission rod. The locking rod is vertically arranged on one side of the transmission rod. The end of the locking rod inside the housing has a slot that opens towards the transmission rod. The rocker arm is inserted into the slot. When the transmission rod drives the rocker arm to swing up and down through the cam, the rocker arm... The lever drives the locking lever to move back and forth axially. A U-shaped moving terminal is provided on the side of the transmission lever away from the locking lever. The two sidewalls of the moving terminal are arranged radially along the transmission lever. A protrusion is provided on the cam or transmission lever. The protrusion rotates with the transmission lever. The rotation path of the protrusion interferes with the sidewall of the moving terminal near the transmission lever. When the protrusion rotates to the point of interfering with the moving terminal, it pushes the moving terminal to elastically deform away from the transmission lever. A stationary terminal is provided on the side of the moving terminal near the transmission lever. The top of the stationary terminal is opposite to the top of the sidewall of the moving terminal near the transmission lever. When the transmission lever drives the locking lever to extend to the locked state or retract to the unlocked state, the protrusion abuts or separates from one side of the moving terminal, causing the moving terminal to disconnect or connect with the stationary terminal. The moving terminal and the stationary terminal are respectively connected to the outer shell.

[0005] As a preferred embodiment, 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 stationary 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 stationary terminal and conducts electricity under its own elastic force.

[0006] As a preferred embodiment, a first worm is coaxially mounted on the output shaft of the drive motor, and a first turbine is rotatably connected inside the housing. The first turbine meshes with the first worm, and a second worm is coaxially mounted on one end of the first turbine. One end of the transmission rod is coaxially connected to the second turbine, which meshes with the second worm, and the other end of the transmission rod is rotatably connected to the housing.

[0007] As a preferred embodiment, one end of the transmission rod is driven by a drive motor, and the other end is coaxially connected to a transmission gear. A reset shaft is rotatably connected to the housing, and the reset shaft is parallel to the transmission rod and disposed on one side of the transmission rod. One end of the reset shaft extends out of the housing and is connected to a reset handle, while the other end of the reset shaft is located inside the housing and is fitted with a reset gear. The reset gear meshes with the transmission gear. The reset gear can rotate relative to the reset shaft within a limited angle 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 swing arm and the locking rod to move.

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

[0009] As a preferred embodiment, the central angle corresponding to the groove is 30°-120°.

[0010] As a preferred embodiment, a continuous fan-shaped area in the circumference of the reset gear is a transmission zone, with teeth arranged around the periphery of the transmission zone, and the remaining fan-shaped areas are limiting zones. The top radius of the area near the teeth on the periphery of the limiting zone is not less than the tooth tip circle of the reset gear, and the central angle of the transmission zone is equal to the rotation angle of the transmission rod.

[0011] The beneficial effects of this utility model are as follows: By setting a moving terminal and a stationary terminal on one side of the transmission rod, and using a protrusion that rotates with the transmission rod to control the connection or disconnection of the moving terminal and the stationary terminal, the micro switch can be used to send locking or unlocking signals. This avoids the need to use a micro switch to send signals, reducing production costs. At the same time, the installation flexibility of the stationary and moving terminals is higher, making it easier to arrange them inside the charging pile electronic lock. This further reduces the size of the charging pile electronic lock, further reduces the cost of the charging pile electronic lock, and improves the assembly flexibility of the charging pile electronic lock inside the charging pile. Attached Figure Description

[0012] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0013] Figure 1This is an exploded three-dimensional view of Example 1;

[0014] Figure 2 This is a three-dimensional view of the overall structure of Example 1;

[0015] Figure 3 This is a perspective view of the specific structure of the reset gear 18 described in Embodiment 1;

[0016] Figure 4 This is a schematic diagram of the gear distribution structure of the reset gear 18 described in Embodiment 1;

[0017] Figures 1-4 In the middle: 1. Outer shell; 2. Locking rod; 3. Drive motor; 4. Transmission rod; 5. Cam; 6. Rocker arm; 7. Slot; 8. Moving terminal; 9. Protrusion; 10. Stationary terminal; 11. First worm gear; 12. First turbine; 13. Second worm gear; 14. Second turbine; 15. Transmission gear; 16. Reset shaft; 17. Reset handle; 18. Reset gear; 19. Inner hole; 20. Groove; 21. Actuating block; 22. Transmission area; 23. Gear; 24. Limiting area. Detailed Implementation

[0018] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings. Example 1

[0019] like Figures 1-4The charging pile electronic lock shown includes a housing 1, a locking rod 2 movably inserted into the housing 1, and a drive mechanism for driving the locking rod 2. One end of the locking rod 2 extends out of the housing 1 and the other end is inserted into the housing 1. The drive mechanism is located inside the housing 1 and drives the locking rod 2 to extend and retract along its axial direction. The drive mechanism includes a drive motor 3 and a transmission rod 4. The transmission rod 4 and the drive motor 3 are connected by a transmission pair. A cam 5 is connected to the transmission rod 4. A rocker arm 6 is connected to the end of the cam 5 away from the transmission rod 4. The rocker arm 6 is parallel to and separate from the transmission rod 4. The locking rod 2 is vertically arranged on one side of the transmission rod 4. The end of the locking rod 2 located inside the housing 1 has a slot 7 that opens towards the transmission rod 4. The rocker arm 6 is inserted into the slot 7. When the transmission rod 4 drives the rocker arm 6 to swing up and down through the cam 5, the rocker arm 6 drives the locking rod 2 to move back and forth axially. When the locking rod 2 extends, it locks the charging gun head. When the locking rod 2 retracts, it unlocks the charging gun head. A U-shaped movable terminal 8 is provided on the side of the transmission rod 4 away from the locking rod 2. The two sidewalls of the movable terminal 8 are arranged radially along the transmission rod 4. A protrusion 9 is provided on the cam 5 or the transmission rod 4. The protrusion 9 rotates with the transmission rod 4. The rotation path of the protrusion 9 interferes with the sidewall of the movable terminal 8 near the transmission rod 4. When the protrusion 9 rotates to interfere with the movable terminal 8, it pushes the movable terminal 8 to elastically deform away from the transmission rod 4. A stationary terminal 10 is provided on the side of the movable terminal 8 near the transmission rod 4. The top of the stationary terminal 10 is opposite to the top of the sidewall of the movable terminal 8 near 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 movable terminal 8 and pushes the movable terminal 8 to separate from the stationary 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 stationary terminal 10 and conducts under its own elastic force.

[0020] In this embodiment, the transmission rod 4 has an irregular shape. A portion of the transmission rod 4 opposite to the swing arm 6 is eccentrically positioned on one side of the transmission rod 4 and separated from the swing arm 6 on opposite sides of the transmission rod 4's axis. This improves the dynamic balance of the transmission rod 4 and swing arm 6 during swinging, reducing vibration of the charging pile's electronic lock. The end of the transmission rod 4 furthest from the cam 5 is connected to the second turbine 14. The swing arm 6 has a hollow tubular structure to reduce its weight, save materials, lower costs, and simplify dynamic balance adjustment. To further improve dynamic balance, the non-meshing portion can be reduced based on the actual swing angle of the second turbine 14, further reducing manufacturing costs.

[0021] In this embodiment, the drive motor 3 is controlled by the charging pile controller, and the positive and negative terminals of the drive motor pass through the outer casing 1 and are connected to the external drive circuit. This structure is conventional technology in charging pile electronic locks and will not be described here. For a more detailed description of the drive motor connection method, please refer to the utility model patent with patent number ZL 201920486949.5, which discloses "An Electronic Lock for New Energy Vehicles with a Mechanical Unlocking Device".

[0022] Both the moving terminal 8 and the stationary terminal 10 have one end extending out of the outer casing 1 and connected to the control circuit. When the moving terminal 8 and the stationary terminal 10 are connected, the controller of the charging pile will receive a high level or a low level. When the moving terminal 8 and the stationary terminal 10 are disconnected, the electrical signal received by the controller of the charging pile will change, thereby determining that the locking state of the charging pile electronic lock has changed. This control method is common in charging piles and belongs to conventional technology. It is only briefly described here to make it easier for those skilled in the art to understand this utility model.

[0023] According to the above technical solution, in practical applications, the conduction separation relationship between the stationary terminal 10 and the moving terminal 8 can also be reversed. For example, when the protrusion 9 pushes one side wall of the moving terminal 8 to elastically deform, the moving terminal 8 and the stationary terminal 10 come into contact to achieve conduction; conversely, they are disconnected. This arrangement is an equivalent substitution and falls within the protection scope of this utility model.

[0024] The specific structure of the transmission rod 4 and the drive motor 3 connected by a transmission pair in the above technical solution is as follows: a first worm gear 11 is coaxially mounted on the output shaft of the drive motor 3, and a first turbine gear 12 is rotatably connected inside the housing 1, with the first turbine gear 12 meshing with the first worm gear 11. A second worm gear 13 is coaxially mounted at one end of the first turbine gear 12, and a second turbine gear 14 that meshes with the second worm gear 13 is coaxially connected to one end of the transmission rod 4. The other end of the transmission rod 4 is rotatably connected to the housing 1.

[0025] In this embodiment, one end of the transmission rod 4 is driven by the drive motor 3, and the other end is coaxially connected to a transmission gear 15. A reset shaft 16 is rotatably connected to the outer casing 1. The reset shaft 16 is parallel to the transmission rod 4 and is disposed on one side of the transmission rod 4. One end of the reset shaft 16 extends out of the outer casing 1 and is connected to a reset handle 17. The other end of the reset shaft 16 is located inside the outer casing 1 and is sleeved with a reset gear 18. The reset gear 18 meshes with the transmission gear 15. The reset gear 18 can rotate relative to the reset shaft 16 within a limited angle. A groove 20 extending circumferentially by a certain central angle is provided on the inner wall of the inner hole 19 of the reset gear 18. A toggle block 21 is provided on the outer wall of the reset shaft 16 and is inserted into the groove 20. The toggle block 21 can swing back and forth along the circumference of the reset shaft 16 within the groove 20.

[0026] 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, which in turn drives the swing rod 6 and the locking rod 2 to move.

[0027] The purpose of setting the groove 20 is to prevent the reset shaft 16 and the reset handle 17 from always rotating with the rotation of the transmission rod 4.

[0028] Of course, in practical applications, users can also keep the reset shaft 16 and the reset gear 18 circumferentially fixed.

[0029] In this embodiment, the central angle corresponding to the groove 20 is 30°-120°, and is more preferably not less than the sum of the swing angle of the transmission rod 4 and the central angle corresponding to the length of the toggle block 21 in the circumferential direction of the reset gear 18.

[0030] The transmission gear 15 has a continuous fan-shaped area in the circumference as the transmission area 22. The transmission area 22 is surrounded by teeth 23. The remaining fan-shaped areas are the limiting areas 24. The top radius of the area of ​​the limiting area 24 near the teeth 23 is not less than the tooth tip circle of the transmission gear 15. The central angle of the transmission area 22 is equal to the rotation angle of the transmission rod 4.

[0031] The purpose of setting the limit zone 24 is to limit the rotation range of the reset handle 17 by using the transmission gear 15, so as to prevent the reset handle 17 from rotating excessively and causing the rocker arm 6 to swing excessively, damaging the locking rod 2 or disengaging from the slot 7 on the locking rod 2.

[0032] The working process of this utility model is as follows: Figure 1 The diagram shows the unlocked state of the charging pile's electronic lock. At this time, the moving terminal 8 and the stationary terminal 10 abut against each other, causing the signal circuit to be connected. An electrical signal representing the unlocked state is sent to the charging pile's controller. At this time, the charging gun's controller will not connect the charging circuit. When a charging gun is inserted into the charging pile and fully inserted, the charging pile's controller will receive a signal representing the charging gun being inserted through other detection devices. It will then control the drive motor 3 to rotate. The drive motor 3 drives the transmission rod 4 to rotate through the transmission pair. The transmission rod 4 drives the cam 5 to rotate. The cam 5 drives the swing arm 6 and the protrusion 9 to rotate synchronously. The swing arm 6 swings upward, causing the locking rod 2 to rise and lock the charging gun. At the same time, the protrusion 9 rotates towards the moving terminal 8. When the locking rod 2 rises to the locking hole on the charging gun, the protrusion 9 abuts against and pushes the moving terminal 8 to elastically deform away from the stationary terminal 10, causing the moving terminal 8 to separate from the stationary terminal 10. At this time, the signal circuit connected by the moving terminal 8 and the stationary terminal 10 is disconnected. The charging pile's controller then receives another electrical signal representing the locked state. The controller connects the charging circuit based on this signal.

[0033] Once charging is complete, the controller can reverse the drive motor to unlock. After unlocking, the moving terminal 8 and the stationary terminal 10 are reconnected, and the controller cuts off the charging circuit.

[0034] When a charging pile device malfunctions and the controller cannot actively control the electronic lock of the charging pile to unlock, the user can drive the swing arm 6 to swing by rotating the reset handle 17, thereby driving the lock arm 2 to retract to unlock, or drive the lock arm 2 to extend to lock.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some of the application examples, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. An electronic lock for a charging station, comprising a housing (1), a locking rod (2) movably inserted 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 disposed 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 includes a drive motor (3) and a transmission rod (4). The transmission rod (4) is connected to the drive motor (3) through a transmission pair. A cam (5) is connected to the transmission rod (4). A rocker arm (6) is connected to the end of the cam (5) away from the transmission rod (4). The rocker arm (6) is parallel to and separate from the transmission rod (4). The locking rod (2) is vertically arranged on one side of the transmission rod (4). The locking rod (2) has a slot (7) opening towards the transmission rod (4) at one end inside the housing (1). The rocker arm (6) is inserted into the slot (7). When the transmission rod (4) drives the rocker arm (6) to swing up and down through the cam (5), the rocker arm (6) drives the locking rod (2) to move back and forth axially. A U-shaped moving terminal (8) is provided on the side of the transmission rod (4) away from the locking rod (2). The two sidewalls of the moving terminal (8) are arranged radially along the transmission rod (4). A protrusion (9) is provided on the cam (5) or transmission rod (4). 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) near the transmission rod (4). When the protrusion (9) rotates to interfere with the moving terminal (8), it pushes the moving terminal (8) to elastically deform away from the transmission rod (4). A stationary terminal (10) is provided on the side of the moving terminal (8) near the transmission rod (4). The top of the stationary terminal (10) is opposite to the top of the side wall of the moving terminal (8) near the transmission rod (4). When the transmission rod (4) drives the locking rod (2) to extend to the locked state or retract to the unlocked state, the protrusion (9) abuts or separates from the side of the moving terminal (8), causing the moving terminal (8) to disconnect or connect with the stationary terminal (10). The moving terminal (8) and the stationary terminal (10) are respectively connected to the outer shell (1).

2. The electronic lock for the charging pile 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 moving terminal (8) and pushes the moving terminal (8) to separate from the stationary 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 stationary terminal (10) and conducts under its own elastic force.

3. The electronic lock for the charging pile according to claim 1, characterized in that, The output shaft of the drive motor (3) is coaxially provided with a first worm (11), and a first turbine (12) is rotatably connected inside the housing (1). The first turbine (12) meshes with the first worm (11). A second worm (13) is coaxially provided at one end of the first turbine (12). A second turbine (14) meshes with the second worm (13) at 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 electronic lock for a charging station according to claim 1, characterized in that, One end of the transmission rod (4) is driven by the drive motor (3), and the other end is coaxially connected to a transmission gear (15). A reset shaft (16) is rotatably connected to the outer shell (1). The reset shaft (16) is parallel to the transmission rod (4) and is set on one side of the transmission rod (4). One end of the reset shaft (16) extends out of the outer shell (1) and is connected to a reset handle (17). The other end of the reset shaft (16) is located inside the outer shell (1) and is fitted with a reset gear (18). The reset gear (18) meshes with the transmission gear (15). The reset gear (18) can rotate relative to the reset shaft (16) within a limited angle 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 locking rod (2) to move.

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

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

7. The electronic lock for a charging station according to claim 4, characterized in that, The reset gear (18) has a continuous fan-shaped area in the circumference as a transmission area (22). The transmission area (22) is surrounded by teeth (23), and the remaining fan-shaped areas are limit areas (24). The top radius of the area of ​​the limit area (24) near the teeth (23) is not less than the tooth tip circle of the reset gear (18). The central angle of the transmission area (22) is equal to the rotation angle of the transmission rod (4).

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