KR-102963737-B1 - LOCKING-UNLOCKING DEVICE FOR PLUG OF ELECTRIC VEHICLE SUPPLY EQUIPMENT

Abstract

The present invention relates to a charging plug locking-unlocking device for an electric vehicle charging facility, and more specifically, to a charging plug locking-unlocking device for an electric vehicle charging facility that prevents a backdrive phenomenon with respect to a power transmission means that transmits driving force to a locking rod, thereby maintaining a stable locked operating state even when external force or impact is applied.

Inventors

• 노혁준

Assignees

• 에이치와이자동차부품 주식회사

Dates

Publication Date

20260512

Application Date

20241114

Claims (9)

1. A device mounted on the charging port of an electric vehicle to lock and unlock the charging plug of an electric vehicle charging facility: A device case in which a receiving space is formed inside; A drive motor capable of forward and reverse rotation mounted inside the above device case; A locking rod that is coupled through the device case and moves linearly in a direction protruding or retracting from the device case by the rotational driving force of the drive motor, and locks and unlocks the charging plug; Power transmission means for transmitting the rotational driving force of the above-mentioned drive motor to the above-mentioned locking rod; and It includes a manual operation module connected to the power transmission means and operated to move the locking rod in a straight line by user operation, and the power transmission means includes a composite planetary gear module formed not to operate in response to external force input from the locking rod. The above composite planetary gear module is, A first ring gear having a first internal tooth profile formed on its inner surface and rotatably fixedly mounted inside the device case; A second ring gear having a second internal tooth profile formed on its inner surface and positioned oppositely to the first ring gear on the same axis and rotatably mounted; A planetary gear having a first planetary gear portion meshing with the first internal tooth profile and a second planetary gear portion meshing with the second internal tooth profile, each formed in both axial directions; and A sun gear having a first sun gear formed in one side region based on the axial direction to mesh with the first planetary gear. A charging plug locking-unlocking device for an electric vehicle charging facility, comprising, wherein the rotational driving force of the drive motor is transmitted to the sun gear, and the locking rod is coupled to move linearly according to the rotation of the second ring gear.
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3. In claim 1, A pinion gear that rotates integrally with the second ring gear is coupled to the second ring gear, and A charging plug locking-unlocking device for an electric vehicle charging facility, wherein the above locking rod has a rack gear formed at one end that meshes with the pinion gear and moves linearly according to the rotation of the pinion gear.
4. In claim 3, A charging plug locking-unlocking device for an electric vehicle charging facility, wherein a stopper means is provided to limit the operating range of the power transmission means so as to limit the linear travel distance of the locking rod, and the stopper means is formed to adjust the limiting range for the linear travel distance of the locking rod.
5. In claim 4, The above stopper means is A stopper body that is slidably inserted into one side of the pinion gear and rotates integrally with the pinion gear, with a stopper projection formed on one side of its outer surface; and A stopper catch formed inside the device case so as to engage with the stopper projection when the stopper body rotates. A charging plug locking-unlocking device for an electric vehicle charging facility, comprising, wherein the stopper body is formed such that the rotational position angle can be selectively adjusted during the process of sliding insertion into the pinion gear.
6. In claim 4, The above stopper means is First and second stopper bodies that are sequentially slidably inserted into a coupling protrusion protruding from one side of the pinion gear and rotate integrally with the pinion gear, with a protruding step formed on one side of each outer circumference; and A stopper catch formed inside the device case so as to engage with the protruding step when the first and second stopper bodies rotate. A charging plug locking-unlocking device for an electric vehicle charging facility, comprising, wherein the first and second stopper bodies are formed such that their respective rotational placement angles are selectively adjustable during the process of sliding insertion into the pinion gear.
7. In claim 1, The above sun gear is formed such that the first sun gear section, the second sun gear section, and the third sun gear section are arranged in a line along the axial direction, and The above power transmission means is A charging plug locking-unlocking device for an electric vehicle charging facility, further comprising a first gear train that is engaged with the second sun gear unit to transmit the rotational driving force of the drive motor to the sun gear.
8. In claim 7, The above manual operation module is A manual operating lever rotatably mounted on the above device case; and A second gear train that is engaged with the third sun gear unit to transmit the rotational driving force of the manual operation lever to the sun gear. A charging plug locking-unlocking device for an electric vehicle charging facility, including
9. In claim 1, It further includes a detection sensor capable of detecting the operating status of the locking and unlocking of the above-mentioned locking rod, A charging plug locking-unlocking device of an electric vehicle charging facility, wherein the above-described sensing sensor operates in such a manner that it is pressed or released by the locking rod as the locking rod operates in locking and unlocking operations.

Description

Locking-Unlocking Device for Charging Plug of Electric Vehicle Supply Equipment The present invention relates to a charging plug locking-unlocking device for an electric vehicle charging facility. More specifically, the invention relates to a charging plug locking-unlocking device for an electric vehicle charging facility that prevents a backdrive phenomenon with respect to a power transmission means transmitting driving force to a locking rod, thereby maintaining a stable locked operating state even when external force or impact is applied. As the use of electric vehicles (EVs) increases globally, the expansion of charging infrastructure to support them is becoming essential, and accordingly, various technologies for EV charging facilities are being researched and developed. The charging of an electric vehicle battery is carried out by supplying power for a certain period of time while the charging plug of the charging facility is connected to the charging port of the electric vehicle. Therefore, it is very important to maintain a stable connection between the charging plug and the charging port of the electric vehicle during the charging process. Generally, electric vehicle charging plugs are designed to be physically connected to the vehicle's charging port to ensure the stable flow of high voltage and high current during the charging process. However, if the charging plug becomes unstable or unexpectedly detaches from the charging port due to external impact or other factors, it may cause charging to stop or result in safety accidents. Accordingly, the charging port of an electric vehicle is typically equipped with a locking-unlocking device to prevent the charging plug from becoming detached during the charging process. The charging plug locking-unlocking device basically operates to physically lock and secure the charging plug while the charging operation is in progress, and to unlock the charging plug after the charging operation is completed. In particular, since the charging plug must not be separated by external force or impact while the charging plug is inserted into the charging port and the charging process is in progress, the charging plug locking-unlocking device must also be designed so that the connection is not released due to external force or impact. Since the arrangement of such charging plug locking-unlocking devices varies depending on the vehicle type, the structure of the charging plug and the charging port, etc., it is required that the locking state not be released due to self-weight or vehicle vibration under worst-case conditions, and consequently, it is fundamentally required that the locking-unlocking device not be unlocked by external force. A charging plug locking-unlocking device is generally configured such that a locking rod moves in a straight line to engage or disengage with the charging plug. The locking rod is typically configured to move by receiving driving force from a drive motor through a power transmission means, such as a gear module. However, such gear modules cannot completely prevent the back drive phenomenon, and consequently, if an external force is applied to the locking rod, the locking rod may move due to the back drive phenomenon, causing the charging plug to unlock. To prevent the backdrive phenomenon of such gear modules, a form using worms and worm gears in gear modules is being introduced. However, when worms and worm gears are applied, there is a disadvantage that the operating speed is slow due to the gear structure, and if the lead angle of the worm and worm gear is significantly changed to increase the operating speed, there are problems such as the inability to completely prevent the backdrive phenomenon. FIG. 1 is a perspective view schematically illustrating the external appearance of a charging plug locking-unlocking device of an electric vehicle charging facility according to one embodiment of the present invention. FIG. 2 is a partially exploded perspective view schematically illustrating the configuration of a charging plug locking-unlocking device of an electric vehicle charging facility according to one embodiment of the present invention. FIG. 3 is a perspective view schematically illustrating the configuration of a power transmission means according to one embodiment of the present invention. FIG. 4 is a partially exploded perspective view schematically illustrating the detailed configuration of a power transmission means according to one embodiment of the present invention. FIG. 5 is a plan view schematically illustrating the configuration of a power transmission means according to one embodiment of the present invention. FIG. 6 is a cross-sectional view schematically illustrating the structure of a composite planetary gear module of a power transmission means according to one embodiment of the present invention. Figure 7 is a cross-sectional view taken along the "AA" and "BB" lines shown in Figure 6. FIG. 8 is a schematic diagram i