A clutch type electronic lock for vehicle charging interface

Abstract

The present invention relates to the field of vehicle charging technology, and in particular to a clutch-type electronic lock for a vehicle charging interface, which includes a housing, a motor and a lock rod; the motor output shaft is fixedly connected with a worm, a horizontally placed mandrel is fixedly arranged in the housing, a worm wheel, a clutch block and a first gear are sequentially sleeved on the mandrel in a rotationally connected manner, the worm wheel is meshed with the worm, a keyway is provided on the side of the clutch block close to the worm wheel, a spline slidably inserted in the keyway is connected to the side wall of the worm wheel, the clutch block is slidably connected to the mandrel, a spring is provided between the side wall of the keyway of the clutch block and the spline, meshing teeth that mesh with each other are provided on the adjacent surfaces of the clutch block and the first gear, the meshing teeth are used to make the clutch block and the first gear rotate synchronously, and a connecting piece that can drive the lock rod to move linearly with the rotation of the first gear is provided in the housing. The present invention can protect the device after the lock rod locks the charging gun, and avoid the situation where the device is damaged due to motor stalling as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and in particular to a clutch type electronic lock of a vehicle charging interface. Background Art

[0002] The electronic lock at the vehicle charging port is mainly to ensure that the charging gun and the charging port are firmly connected during the charging process, to prevent the charging gun from accidentally falling off or being pulled out manually, thereby ensuring the safety and reliability of the charging process. This electronic lock is especially important for public charging stations because it prevents unauthorized users from pulling out the charging gun, ensuring that the vehicle being charged can complete the charging smoothly, thus providing safety and convenience.

[0003] An electronic lock usually includes one or more movable mechanical parts in the charging port, such as a lock pin or a buckle. When the charging gun is inserted into the charging port, these parts will automatically lock the charging gun so that it cannot be easily pulled out. When the owner unlocks the vehicle, the charging gun can be unlocked by a manual unlocking mechanism inside the car, or it can be automatically sensed and unlocked by a sensor. A Chinese patent document with the authorization announcement number CN117424032B discloses an electronic locking device for a car charging port, including a housing, a locking rod, a traction rope and a dial block. A motor is provided in the housing, and the motor can drive the locking rod to move to achieve locking and unlocking of the charging gun.

[0004] With regard to the above-mentioned related technologies, after the locking rod locks the charging gun, the locking rod cannot move further, and the motor is blocked, which will cause the motor to continue to run in a high temperature state, which may damage the insulation material of the motor and even cause the generator to burn out. Long-term blocking may cause damage to the locking rod, gears or other mechanical parts, which may cause wear, breakage or deformation of the parts. Summary of the invention

[0005] In view of this, the present invention provides a clutch type electronic lock for a vehicle charging port, aiming to solve the technical problem in the prior art that the motor may be blocked after the lock rod is locked, which may cause damage to the device.

[0006] To solve the above technical problems, the present invention provides a clutch-type electronic lock for a vehicle charging interface, which adopts the following technical solution: a clutch-type electronic lock for a vehicle charging interface, comprising a shell, a motor and a lock rod; the motor output shaft is fixedly connected to a worm, a horizontally placed core shaft is fixedly arranged in the shell, a worm wheel, a clutch block and a first gear are sequentially sleeved on the core shaft in a rotationally connected manner, the worm wheel is meshed with the worm, a key slot is provided on the side of the clutch block close to the worm wheel, a spline slidably inserted in the key slot is connected to the side wall of the worm wheel, the clutch block is slidably connected to the core shaft, a spring is provided between the side wall of the key slot of the clutch block and the spline, mutually meshing meshing teeth are provided on the adjacent surfaces of the clutch block and the first gear, the meshing teeth are used to make the clutch block and the first gear rotate synchronously, and a connecting piece is provided in the shell that can drive the lock rod to move linearly as the first gear rotates.

[0007] By adopting the above technical solution, when the device is running, the motor drives the worm wheel to rotate through the worm, and at the same time drives the clutch block and the first gear to rotate, thereby realizing the linear movement of the control lock rod; when the lock rod position is fixed, as the motor rotates, when the torque of the clutch block exceeds the upper limit value of the clutch structure design, the clutch block compresses the spring, the clutch block moves away from the first gear and close to the worm wheel, and the clutch block is separated from the first gear, thereby avoiding the situation where the motor is blocked and causes damage to the device as much as possible.

[0008] Optionally, the connecting member includes a second gear meshing with the first gear, a toggle shaft eccentrically arranged with the second gear, and a moving rod fixedly connected to the locking rod, and the moving rod is provided with a toggle groove matching the toggle shaft.

[0009] By adopting the above technical solution, as the first gear rotates, the second gear is driven to rotate, the toggle shaft rotates and drives the moving rod to move linearly, thereby controlling the linear movement of the locking rod and achieving a stable structure.

[0010] Optionally, a limit block is connected to the second gear and rotates synchronously with the second gear.

[0011] By adopting the above technical solution, the rotation range of the second gear is limited, thereby limiting the linear movement range of the locking rod, thereby reducing the conflict between structures.

[0012] Optionally, a traction rope and a toggle block for manual unlocking are provided on the shell, the traction rope is connected to the toggle block, a connecting rod is connected in series between the toggle block and the limit block, and the connecting rod is coaxially arranged with the second gear.

[0013] By adopting the above technical solution, the traction rope is pulled to drive the toggle block to rotate, and the connecting rod and the second gear to rotate, so as to realize manual unlocking, and the structure is stable and easy to operate.

[0014] Optionally, one end of the traction rope passes through the toggle block and is fixedly connected to a toggle ball, and the toggle block is provided with a groove matching the toggle ball.

[0015] By adopting the above technical solution, the friction between the traction rope and the toggle block is reduced, the smoothness of the device is improved, and the toggle ball is provided to achieve more accurate positioning.

[0016] Optionally, a pin rod is coaxially arranged at one end of the locking rod located in the charging gun, and a clearance groove is opened in the charging gun. The clearance groove enables the pin rod and the locking rod to move away from the central axis of the charging gun while approaching the shell. A sensor for monitoring the position of the locking rod is provided in the shell.

[0017] By adopting the above technical solution, when the charging gun is pulled out by excessive external force, the pin rod and the lock rod are moved into the clearance groove, and the pin rod and the lock rod are retracted into the shell partly. When the sensor senses the movement of the lock rod, the car and the external charger are powered off to protect the car and reduce the damage to the vehicle. The pin rod can abut against the side wall of the clearance groove to limit the movement of the lock rod and the pin rod, and avoid the charging gun being pulled out directly when the car is not powered off.

[0018] Optionally, the end of the pin rod is configured to be conical.

[0019] By adopting the above technical solution, the pin rod can move along the radial direction of the charging gun, thereby avoiding as much as possible the situation where the structure cannot be moved and the device is damaged due to conflict between structures.

[0020] Optionally, one end of the locking rod connected to the pin rod is configured as a rounded corner.

[0021] By adopting the above technical solution, the locking rod is facilitated to move toward the direction close to the shell.

[0022] In summary, the present invention includes the following beneficial technical effects:

[0023] 1. After the lock rod locks the charging gun, the lock rod cannot move further. As the motor rotates, the worm drives the worm wheel to rotate, and the worm wheel and the clutch block rotate synchronously, but the rotation of the first gear is limited. When the torque of the clutch block exceeds the upper limit of the clutch structure design, the clutch block compresses the spring, the clutch block moves away from the first gear and approaches the worm wheel, the meshing teeth on the clutch block separate from the meshing teeth of the first gear, the clutch block rotates, but the first gear and the lock rod are not affected, reducing the damage to the device.

[0024] 2. The limit block rotates with the second gear. During the rotation of the limit block, it can abut against the two ends of the moving rod, limiting the rotation range of the limit block and the second gear, that is, limiting the extension and retraction distance of the locking rod, so that the locking rod can move linearly within the limited range, reducing the conflict between structures, protecting the device, and extending the service life of the device.

[0025] 3. A pin rod and a sensor are set. When the charging gun is subjected to excessive external force, the pin rod and the lock rod retract to a certain distance inside the shell. The sensor senses the electronic lock status and the displacement of the lock rod, cuts off the power of the car, and causes the motor to actively drive the lock rod to retract, thereby reducing the damage to the device caused by excessive external force on the charging gun. Cutting off the power of the car can also protect the safety of the car, improve the flexibility of the device, and avoid directly pulling out the charging gun when the car is not powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the clutch block and the connecting member in an embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the worm gear, the clutch block and the first gear in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of a connecting member and a locking rod in an embodiment of the present invention;

[0030] Figure 5 for Figure 1 A partial enlarged schematic diagram of part A;

[0031] Figure 6 Schematic diagram of the structure of the locking rod and the charging gun in an embodiment of the present invention.

[0032] Explanation of the accompanying drawings: 1. Housing; 11. Core shaft; 2. Motor; 21. Worm; 3. Lock rod; 4. Worm wheel; 41. Spline; 5. Clutch block; 51. Keyway; 6. First gear; 61. Meshing tooth; 7. Connecting piece; 71. Second gear; 72. Toggle shaft; 73. Moving rod; 731. Toggle slot; 74. Limit block; 8. Traction rope; 81. Toggle block; 82. Toggle ball; 83. Connecting rod; 9. Pin rod; 91. Give way slot; 92. Sensor; 10. Charging gun. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0034] The following is combined with Figure 1 -Attached Figure 6 The present invention is described in further detail.

[0035] The embodiment of the invention discloses a clutch type electronic lock of a vehicle charging interface.

[0036] Reference Figure 1 , Figure 2 and Figure 3 A clutch type electronic lock for a vehicle charging interface includes a housing 1, a motor 2 and a lock rod 3. The output shaft of the motor 2 is fixedly connected to a worm 21, which is horizontally arranged and rotatably connected to the inner bottom wall of the housing 1. When the motor 2 is started, the worm 21 can be driven to rotate. A horizontally placed mandrel 11 is fixedly arranged in the housing 1, and the mandrel 11 is located above the worm 21. The side wall of the mandrel 11 is sequentially sleeved with a worm wheel 4, a clutch block 5 and a first gear 6 in a rotatably connected manner. The bottom of the worm wheel 4 contacts the top of the worm 21 and the worm wheel 4 meshes with the worm 21. When the worm 21 rotates, the worm wheel 4 is driven to rotate. The clutch block 5 is in an annular shape as a whole. A key slot 51 is provided on one side of the clutch block 5 close to the worm wheel 4. The key slot 51 extends along the axis of the mandrel 11. There are two key slots 51. The two key slots 51 are arranged along the circumference of the mandrel 11. The side wall of the worm wheel 4 is connected with two splines 41. The two splines 41 correspond to the two key slots 51 one by one. The splines 41 are slidably inserted in the key slots 51. When the worm wheel 4 rotates, the clutch block 5 is driven to rotate through the splines 41. The clutch block 5 is slidably connected to the mandrel 11. A spring is provided between the side wall of the key slot 51 of the clutch block 5 and the splines 41. The meshing teeth 61 that mesh with each other are provided on the adjacent surfaces of the clutch block 5 and the first gear 6. The meshing teeth 61 are used to make the clutch block 5 and the first gear 6 rotate synchronously; when the clutch block 5 contacts the first gear 6, the clutch block 5 rotates to drive the first gear 6 to rotate synchronously. When the clutch block 5 is separated from the first gear 6, the clutch block 5 rotates.

[0037] When the device is running, the motor 2 drives the worm wheel 4 to rotate through the worm 21, and drives the clutch block 5 and the first gear 6 to rotate at the same time. After the lock rod 3 locks the charging gun 10, the lock rod 3 cannot move further. As the motor 2 rotates, the worm 21 drives the worm wheel 4 to rotate, and the worm wheel 4 rotates synchronously with the clutch block 5, but the rotation of the first gear 6 is limited. When the torque of the clutch block 5 exceeds the upper limit of the clutch structure design, the clutch block 5 compresses the spring, the clutch block 5 moves away from the first gear 6 and approaches the worm wheel 4, and the meshing teeth 61 on the clutch block 5 are separated from the meshing teeth 61 of the first gear 6. The clutch block 5 rotates and no longer affects the first gear 6, reducing the damage to the device. Among them, the output torque of the motor 2, the rotational torque of the clutch block 5 and its upper limit are technical contents well known to those skilled in the art, and the calculation method and specific values ​​are not described in detail here.

[0038] Reference Figure 2 and Figure 4 , a connecting member 7 is provided in the shell 1, which can drive the locking rod 3 to move linearly as the first gear 6 rotates. The connecting member 7 includes a second gear 71, a toggle shaft 72 and a moving rod 73. The second gear 71 is vertically placed in the shell 1 and is rotatably connected to the shell 1. The second gear 71 is meshed with the first gear 6. When the first gear 6 rotates, the second gear 71 is driven to rotate. The toggle shaft 72 is connected to the side wall of the second gear 71, and the toggle shaft 72 is eccentrically arranged with the second gear 71. A toggle groove 731 matching the toggle shaft 72 is provided on the moving rod 73. As the second gear 71 rotates, the toggle shaft 72 is driven to rotate around the central axis of the second gear 71, thereby pushing the moving rod 73 to move linearly. The structure is stable, which is convenient for utilizing the internal space of the shell 1 and is conducive to the reasonable layout of the structure.

[0039] Reference Figure 2 and Figure 4 The second gear 71 is connected to a limit block 74 which rotates synchronously with the second gear 71 .

[0040] The limit block 74 rotates with the second gear 71. During the rotation process, the limit block 74 can abut against the two ends of the moving rod 73, limiting the rotation range of the limit block 74 and the second gear 71, that is, limiting the extension and retraction distance of the locking rod 3, so that the locking rod 3 can move linearly within the limited range, reducing the conflict between the structures, protecting the device, and extending the service life of the device.

[0041] Reference Figure 1 , Figure 2 and Figure 5 The housing 1 is provided with a traction rope 8 and a toggle block 81 for manual unlocking. One end of the traction rope 8 passes through the toggle block 81 and is fixedly connected to a toggle ball 82. The toggle block 81 is provided with a groove matching the toggle ball 82. A connecting rod 83 is connected in series between the toggle block 81 and the limit block 74. The connecting rod 83 is coaxially arranged with the second gear 71.

[0042] Pulling the traction rope 8 drives the toggle block 81 to rotate, and drives the connecting rod 83 and the second gear 71 to rotate, so as to realize manual unlocking, and the structure is stable and easy to operate.

[0043] Reference Figure 1 , Figure 2 and Figure 6 A pin rod 9 is coaxially arranged at one end of the lock rod 3 located in the charging gun 10, a groove matching the pin rod 9 is provided in the charging gun 10, a clearance groove 91 is provided in the charging gun 10, and the clearance groove 91 is located on the side of the charging gun 10 close to the car. The clearance groove 91 can make the pin rod 9 and the lock rod 3 move away from the central axis of the charging gun 10 while approaching the shell 1, so that the charging gun 10 can be away from the car for a distance. A sensor 92 for monitoring the position of the moving rod 73 and the lock rod 3 is provided in the shell 1. The end of the pin rod 9 is set to a cone shape, and the end of the lock rod 3 connected to the pin rod 9 is set to a rounded corner, so that the pin rod 9 and the lock rod 3 can move along the radial direction of the charging gun 10, so as to avoid the situation where the structure cannot be moved and the device is damaged due to the conflict between the structures as much as possible.

[0044] When the charging gun 10 is subjected to excessive external force, the pin rod 9 and the lock rod 3 are retracted to a certain distance inside the housing 1, and the sensor 92 senses the electronic lock state and the displacement of the lock rod 3, so that the car is powered off, and the motor 2 actively drives the lock rod 3 to retract, thereby reducing the damage to the device caused by excessive external force on the charging gun 10. Powering off the car can also protect the safety of the car and improve the flexibility of the device. When the pin rod 9 and the lock rod 3 move to the point where the side wall of the pin rod 9 abuts against the side wall of the clearance groove 91, the charging gun 10 abuts against the pin rod 9, limiting the further backward movement of the pin rod 9 and the lock rod 3, reducing the damage to other structures caused by the excessive backward movement of the lock rod 3, and avoiding the charging gun 10 from being directly pulled out when the car is not powered off.

[0045] The implementation principle of a clutch-type electronic lock of a vehicle charging interface in an embodiment of the present invention is as follows:

[0046] When the device is running, the motor 2 drives the worm wheel 4 to rotate through the worm 21, and at the same time drives the clutch block 5 and the first gear 6 to rotate, the second gear 71 rotates, and the toggle shaft 72 pushes the moving rod 73 and the locking rod 3, so that the locking rod 3 moves linearly, thereby controlling the locking and unlocking of the locking rod 3 and the charging gun 10.

[0047] After the locking rod 3 locks the charging gun 10, the locking rod 3 cannot move further. As the motor 2 rotates, the worm 21 drives the worm wheel 4 to rotate, and the worm wheel 4 rotates synchronously with the clutch block 5, but the rotation of the first gear 6 is limited. When the torque of the clutch block 5 exceeds the upper limit of the clutch structure design, the clutch block 5 compresses the spring, the clutch block 5 moves away from the first gear 6 and approaches the worm wheel 4, the meshing teeth 61 on the clutch block 5 are separated from the meshing teeth 61 of the first gear 6, and the clutch block 5 rotates, which no longer affects the first gear 6 and the locking rod 3, thereby reducing the possibility of damage to the device.

[0048] When manually unlocking, the traction rope 8 is pulled to drive the toggle block 81 to rotate, and the door can be manually unlocked.

[0049] When the charging gun 10 is subjected to excessive external force, the pin rod 9 and the lock rod 3 are moved into the clearance groove 91 under the pushing action of the inner wall of the charging gun 10, and the pin rod 9 and the lock rod 3 deviate from the central axis of the charging gun 10 and approach the shell 1. The pin rod 9 and the lock rod 3 are retracted to a certain distance inside the shell 1. The sensor 92 senses the electronic lock state and the displacement of the lock rod 3, cuts off the power of the car, and causes the motor 2 to actively drive the lock rod 3 to retract, thereby reducing the damage to the device caused by excessive external force on the charging gun 10. Cutting off the power of the car can also protect the safety of the car and improve the flexibility of the device.

[0050] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A clutch-type electronic lock for a vehicle charging port, comprising a housing (1), a motor (2) and a lock rod (3), characterized in that: The output shaft of the motor (2) is fixedly connected to a worm (21); a horizontally placed mandrel (11) is fixedly arranged in the housing (1); a worm wheel (4), a clutch block (5) and a first gear (6) are sequentially sleeved on the mandrel (11) in a rotationally connected manner; the worm wheel (4) is meshed with the worm (21); a keyway (51) is provided on a side of the clutch block (5) close to the worm wheel (4); and a spline (51) slidably inserted into the keyway (51) is connected to a side wall of the worm wheel (4). 41), the clutch block (5) is slidably connected to the core shaft (11), a spring is provided between the side wall of the keyway (51) of the clutch block (5) and the spline (41), mutually meshing meshing teeth (61) are provided on the adjacent surfaces of the clutch block (5) and the first gear (6), the meshing teeth (61) are used to make the clutch block (5) and the first gear (6) rotate synchronously, and a connecting member (7) is provided in the housing (1) which can drive the locking rod (3) to move linearly with the rotation of the first gear (6); The connecting member (7) comprises a second gear (71) meshing with the first gear (6), a toggle shaft (72) eccentrically arranged with the second gear (71), and a moving rod (73) fixedly connected to the locking rod (3), wherein the moving rod (73) is provided with a toggle groove (731) matching with the toggle shaft (72); The second gear (71) is connected to a limit block (74) which rotates synchronously with the second gear (71); After the lock rod (3) locks the charging gun (10), the lock rod (3) cannot move further. As the motor (2) rotates, the worm (21) drives the worm wheel (4) to rotate. The worm wheel (4) and the clutch block (5) rotate synchronously, but the rotation of the first gear (6) is restricted. When the torque of the clutch block (5) exceeds the upper limit of the clutch structure design, the clutch block (5) compresses the spring, the clutch block (5) moves away from the first gear (6) and approaches the worm wheel (4), the meshing teeth (61) on the clutch block (5) are separated from the meshing teeth (61) of the first gear (6), and the clutch block (5) rotates and no longer affects the first gear (6).

2. The clutch type electronic lock of the vehicle charging port according to claim 1, characterized in that: The housing (1) is provided with a traction rope (8) and a toggle block (81) for manual unlocking, the traction rope (8) being connected to the toggle block (81), a connecting rod (83) being connected in series between the toggle block (81) and the limit block (74), and the connecting rod (83) being coaxially arranged with the second gear (71).

3. The clutch type electronic lock of the vehicle charging port according to claim 2, characterized in that: One end of the traction rope (8) passes through the toggle block (81) and is fixedly connected to a toggle ball (82); a groove matching the toggle ball (82) is provided on the toggle block (81).

4. The clutch type electronic lock of the vehicle charging port according to claim 1, characterized in that: A pin rod (9) is coaxially arranged at one end of the lock rod (3) located in the charging gun (10), and a clearance groove (91) is provided in the charging gun (10). The clearance groove (91) enables the pin rod (9) and the lock rod (3) to move away from the central axis of the charging gun (10) while approaching the housing (1). A sensor (92) for monitoring the position of the lock rod (3) is provided in the housing (1).

5. The clutch type electronic lock of the vehicle charging port according to claim 4, characterized in that: The end of the pin rod (9) is configured to be conical.

6. The clutch type electronic lock of the vehicle charging port according to claim 5, characterized in that: One end of the locking rod (3) that is connected to the pin rod (9) is configured as a rounded corner.

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