Electric vehicle charger cable arrangement device

Abstract

The present invention relates to an electric vehicle charger cable arrangement device capable of automatically arranging cables when a charger is not in use. The electric vehicle charger cable arrangement device includes: a rotation unit which is installed in a charger and on which a cable is wound, and which rotates to release the wound cable when a user pulls the cable; a motor which rotates the rotation unit according to control, so as to wind the cable on the rotation unit; and a control unit that controls the motor, wherein the control unit controls the motor to wind the cable on the rotation unit when the cable is not in use and there is no force applied to a connector located at the end of the cable.

Description

Electric vehicle charger cable organizer

[0001] The present invention relates to an electric vehicle charger cable management device, and more specifically, to a cable management device capable of automatically and safely managing an electric vehicle charger cable.

[0002]

[0003] An electric vehicle charger is a device that includes a power inlet, charging circuit, charging cable, and charging coupler. It plugs into an electric vehicle's socket to charge the battery. These chargers typically have a charging cable length of approximately 6-7 meters to accommodate the varying charging port locations for each vehicle. Consequently, after the vehicle is finished charging, the cable often drags along the floor, leaving it untidy. Furthermore, because it collects dirt, mud, and other foreign substances, few users bother to clean it up properly.

[0004] These loose cables can be damaged by vehicle wheels or users' shoes, which can lead to a risk of electric shock and leakage of electricity due to the exposed cables. In addition, the loose cables can ruin the appearance of the charging station.

[0005]

[0006] The present invention has been devised to solve the technical problem described above, and the purpose of the electric vehicle charger cable management device according to the present invention is to provide an electric vehicle charger cable management device that can automatically organize cables when the charger is not in use.

[0007]

[0008] In order to solve the technical problem described above, the electric vehicle charger cable organizing device according to the present invention comprises a rotating part installed in a charger, on which a cable is wound, and which rotates when a user pulls the cable to unwind the wound cable, a motor that rotates the rotating part according to control to wind the cable around the rotating part, and a control part that controls the motor, wherein the control part controls the motor to wind the cable around the rotating part when the cable is not in use and no force is applied to a connector located at the end of the cable.

[0009] In addition, the connector further includes an acceleration sensor that senses movement of the connector, and the control unit controls the motor based on the sensing value of the acceleration sensor.

[0010] Additionally, the control unit controls the motor to wind the cable around the rotating unit if the connector does not move for a reference time or longer through the acceleration sensor.

[0011] In addition, the invention further includes a roller disposed between the rotating portion and the connector to change the direction in which the cable is drawn out.

[0012] In addition, it further includes a reduction gear installed between the rotation shaft of the motor and the rotation part.

[0013] In addition, the reduction gear includes a worm connected to the rotational axis of the motor, and a worm wheel that is meshed with the worm and rotates according to the rotation of the worm, and is connected to the rotating part.

[0014] In addition, the present invention further includes a winding sensor that senses the degree to which the cable is wound around the rotating part due to the operation of the motor, and the control unit stops the operation of the motor if the degree of rotation of the motor and the sensing value of the winding sensor do not match by a certain degree or more.

[0015] In addition, the case into which the cable is introduced and withdrawn and a foreign matter inflow sensor that senses a substance introduced into the case are included, and the control unit, when the motor operates to wind the cable around the rotating part, if it is determined based on the sensing value of the foreign matter inflow sensor that a substance other than the cable is introduced into the case, the control unit stops the operation of the motor.

[0016] Additionally, the rotating part is a ratchet wheel to prevent rotation in the opposite direction to the direction in which the user pulls the cable.

[0017] In addition, the ratchet wheel includes a driving wheel having a ratchet gear formed on an outer surface thereof and connected to a driving unit and rotating according to an operation of the driving unit, a first driven wheel coaxially positioned with the driving wheel and formed on an outer side of the driving wheel, the first driven wheel including a plurality of holes that penetrate therethrough at a predetermined angle, a pawl that is formed rotatably on one side of both sides of the first driven wheel in the direction of the driving wheel and is positioned adjacent to the hole, and when the driving wheel rotates clockwise, the pawl engages the ratchet gear so that the clockwise rotation of the driving wheel is transmitted to the first driven wheel, and a second driven wheel coaxially formed and protrudingly formed on one side of the first driven wheel, the releaser being inserted into the hole, and when the second driven wheel rotates counterclockwise, the releaser rotates the pawl so that it is not engaged with the ratchet gear.

[0018] In addition, it further includes a mainspring located between the first driven wheel and the second driven wheel, one end of which is connected to the first driven wheel and the other end of which is connected to the second driven wheel, and which returns the second driven wheel to its original position when no external force is applied to the second driven wheel.

[0019] In addition, at least one of the first driven wheel and the second driven wheel has a recessed surface facing each other, and includes a seating space in which the mainspring is seated.

[0020] Additionally, the second driven wheel includes a winding portion formed in a recessed shape on the outer surface to which a cable is wound.

[0021] In addition, the driving side wheel includes an insertion hole formed through the center portion, and includes a buffer part inserted into the insertion hole and connected to the rotational axis of the driving part to rotate the driving side wheel according to the rotational axis of the driving part.

[0022] In addition, the buffer portion includes a recessed portion formed on the outer surface, and the driving side wheel includes an insertion portion formed to protrude to a certain degree toward the center of the inner surface of the insertion hole and inserted into the recessed portion, but formed to be smaller than the recessed portion.

[0023] In addition, the buffer portion includes an insertion portion that protrudes in a vertical direction from the outer circumference on the outer circumference, and the driving side wheel includes a recessed portion that is formed to be recessed toward the outside on the inner circumference of the insertion hole and into which the insertion portion is inserted, but is formed to be larger than the insertion portion.

[0024] In addition, the first driven wheel includes a rotating protrusion formed to protrude in the direction of the driving wheel on one side of both sides, and into which the pole is inserted to form a rotating axis of the pole.

[0025] In addition, the first driven wheel includes an outer protrusion formed so that the outer surface protrudes in the direction of the driving wheel and an elastic member coupled to the inner surface of the outer protrusion to support the pole, and when the second driven wheel rotates counterclockwise and the releaser rotates the pole, the elastic member is compressed by the pole, and when the external force applied to the second driven wheel is removed, the elastic member expands to return the pole to its original position.

[0026]

[0027] According to the electric vehicle charger cable organizing device according to various embodiments of the present invention as described above, there is an effect of automatically organizing cables used in a charger.

[0028] In addition, according to the present invention, the rotating part used to wind the charger cable is implemented as a ratchet wheel including a releaser, so that only the one-way rotational motion of the motor is transmitted to the rotating part where the cable is wound, and when the user pulls and releases the cable, the rotational motion of the rotating part is not transmitted to the motor side, so that unnecessary rotation can be prevented.

[0029] In addition, according to the present invention, the motor and the rotating part are connected to each other by a worm gear, so that a high reduction ratio can be implemented in a narrow space, and at the same time, the rotating part is implemented by a ratchet wheel including a releaser, so that the rotational motion of the rotating part is not transmitted to the motor side.

[0030]

[0031] Figure 1 is a schematic diagram of a charger having an electric vehicle charger cable management device installed according to one embodiment of the present invention.

[0032] Figure 2 is a perspective view of a cable management device according to one embodiment of the present invention.

[0033] FIG. 3 is a perspective view of a cable management device according to an embodiment of the present invention viewed from the rear, with the case illustrated in FIG. 2 omitted.

[0034] FIG. 4 illustrates a state in which the cables of a charger are organized with an electric vehicle charger cable organizing device installed according to an embodiment of the present invention.

[0035] Figure 5 is a perspective view of a ratchet wheel of a general structure.

[0036] Figure 6 is a front view of Figure 5,

[0037] Figure 7 is an exploded perspective view of a rotating part used in a cable management device according to one embodiment of the present invention.

[0038] Figure 8 is a front view of a cable management device according to an embodiment of the present invention when no external force is applied to the ratchet wheel.

[0039] Figure 9 is a front view of the second driven wheel of the ratchet wheel according to the first embodiment of the present invention when it rotates counterclockwise.

[0040]

[0041] <Explanation of symbols>

[0042] 10: Driving side wheel 20: Driven side wheel

[0043] 30: Anti-reverse pole 40: Charger

[0044] 41: Organizing section 50: Rotating section

[0045] 60: Cable 61: Connector

[0046] 62 ; Stopper 70 : Case

[0047] 71: Motor 72: Worm

[0048] 73: Worm wheel

[0049] 80: Roller 100: Drive side wheel

[0050] 110: Ratchet gear 120: Insertion hole

[0051] 121: Insertion part 130: Buffer part

[0052] 131: Depression 210: First-type side wheel

[0053] 211: Hole 212: Outer projection

[0054] 213: Rotating protrusion 310: Second driven side wheel

[0055] 311: Releaser 312: Winding part

[0056] 313: Settling space 400: Pole

[0057] 500: Mainspring 600: Bearing

[0058] 700: Elasticity

[0059]

[0060] The above-described objects, features, and advantages of the present invention will become more apparent through the following examples taken in conjunction with the accompanying drawings. The specific structural and functional descriptions below are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and should not be construed as limited to the embodiments described in this specification or application. Since embodiments according to the concept of the present invention may have various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention. Terms such as first and / or second may be used to describe various components, but the components are not limited to the terms. The above terms are used solely for the purpose of distinguishing one component from another, for example, without departing from the scope of the rights according to the concept of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. When a component is referred to as being connected or coupled to another component, it should be understood that it may be directly connected or coupled to the other component, but there may also be other components in between. Conversely, when a component is referred to as being directly connected or coupled to another component, it should be understood that there are no other components in between. Other expressions used to describe the relationship between components, such as between, directly between, adjacent to, and directly adjacent to, should be interpreted similarly.The terminology used herein is used solely to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. It should be understood that terms such as "comprise" or "have" as used herein indicate the presence of a described feature, number, step, operation, component, part, or combination thereof, and do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein. Hereinafter, the present invention will be described in detail by describing a preferred embodiment of the present invention with reference to the accompanying drawings. The same reference numerals in each drawing represent the same parts.

[0061]

[0062] FIG. 1 is a schematic diagram of a charger (40) having an electric vehicle charger cable management device (hereinafter referred to as a cable management device) installed according to one embodiment of the present invention.

[0063] As illustrated in FIG. 1, a cable management device according to one embodiment of the present invention can be applied to a charger (40) for charging an electric vehicle, and can include a rotating part (50), a motor (not shown), and a control part (not shown).

[0064] The rotating part (50) is installed on the charger (40) and functions to unwind or wind the cable (60). The cable (60) unwinds when the motor, which will be described later, rotates the cable (60) wound around the rotating part (50) in a direction that unwinds it, or when the user performs an action such as pulling the cable (60) to charge the electric vehicle. Conversely, the cable (60) winds when the motor rotates the rotating part (50) in the direction in which the cable (60) winds it to organize the cable (60).

[0065] The rotating part (50) can have any shape as long as it can rotate while the cable (60) is wound around it, and can have a shape such as a circle, an oval, or a polygon. However, if the shape of the rotating part (50) is a polygon, but each angle is small, there is a possibility that pressure is applied to the cable (60) wound around the surface of the rotating part (50), causing the covering to peel off. Therefore, when the rotating part (50) is a polygon, it is preferable that it be a hexagon or larger. The shape of the rotating part (50) mentioned above refers to the shape of the part where the cable (60) is wound around, and as long as it is not the shape of the part where the cable (60) is wound around, the rotating part (50) can have any shape.

[0066] In this embodiment, the rotating part (50) may be a ratchet wheel to prevent reverse rotation. A ratchet wheel is a device that transmits the rotational motion of the motor to another wheel connected to the motor only when the rotational direction of the motor is in one direction, and prevents the rotational motion of the motor from being transmitted to another wheel connected to the motor when the rotational direction of the motor is in a different direction. In the present invention, the rotating part (50) rotates only when the motor rotates in the direction in which the cable (60) is wound, and the rotating part (50) does not rotate when the motor rotates in the direction in which the cable (60) is released. The rotating part (50) implemented as a ratchet wheel will be described later.

[0067] The control unit controls the motor according to the situation, and serves to organize the cable (60) or stop the motor when an accident occurs. More specifically, the control unit controls the motor to rotate the rotating unit (50) in the direction in which the cable (60) is wound when the cable (60) for charging the electric vehicle is not in use, that is, when both the conditions of the connector (61) located at the end of the cable (60) not being connected to the electric vehicle and the force being applied to the connector (61) are satisfied.

[0068] For the above-described operation, the cable management device according to one embodiment of the present invention may further include an acceleration sensor.

[0069] An acceleration sensor senses the movement of the connector (61). The acceleration sensor can be installed on the connector (61), senses the acceleration of the connector (61), and transmits the sensed information to the control unit, whether the connector (61) is being moved by a user. Based on the sensing value of the acceleration sensor, when the connector (61) is not moving and the cable (60) is not in use, the control unit controls the motor (71) to rotate the rotating unit (50), so that the cable (60) is wound around the rotating unit (50).

[0070] The control unit can control the motor to rotate the rotating unit (50) only when the connector (61) does not move for more than a reference time and the cable (60) is not in use. This is because the user may not touch the cable (60) and connector (61) while doing something else for a while. The reference time can be set to various criteria, and can be set to 10 minutes, for example.

[0071] The control unit can rotate the rotational speed of the rotating unit (50) relatively slowly. For example, the control unit can adjust the rotational speed of the rotating unit (50) so that the cable (60) is wound at a rate of 2 mm per second. This is to prevent the user's clothes from being entangled in the cable (60) and dragged along with it.

[0072] As illustrated in FIG. 1, a cable management device according to one embodiment of the present invention may further include a stopper (62) coupled to the center portion of a cable (60). The stopper (62) is a member for limiting the extent to which the cable (60) is introduced. The stopper (62) may be formed to be larger than the size of the inlet (74) of the case (70) described above.

[0073] FIG. 2 is a perspective view of a cable management device according to an embodiment of the present invention, and FIG. 3 is a perspective view of a cable management device according to an embodiment of the present invention viewed from the rear with the case illustrated in FIG. 2 omitted.

[0074] As shown in FIGS. 2 and 3, a cable management device according to one embodiment of the present invention includes a case (70) and a roller (80).

[0075] As illustrated in FIGS. 2 and 3, the motor (71) and a portion of the rotating part (50) are sealed inside the case (70), and the roller (80) is installed on the outside of the case (70). In FIGS. 2 and 3, the case (70) is illustrated in a form in which one side is open, but the present invention is not limited to the form of the case (70) therein. In order to protect the motor (71) and a portion of the rotating part (50), it is preferable that the case (70) be formed with a space inside so as to surround all of the devices. The case (70) may be a part of the charger (40).

[0076] The roller (80) can be installed on the outside of the case (70) and formed to rotate. The cable (60) wound on the portion of the rotating part (50) exposed to the outside of the case (70) is unwound in a direction changed through the roller (80). In the present embodiment illustrated in FIGS. 2 and 3, the roller (80) changes the discharge direction of the cable (60) wound on the rotating part (50) to the downward direction, but the present invention is not limited to the direction of the roller (80) thereto, and the roller (80) can be installed to change the discharge direction of the cable (60) wound on the rotating part (50) to the front, rear, upper, and other various directions of the case (70), and accordingly, the roller (80) can be installed at various positions on the outside of the case (70).

[0077] As shown in Fig. 3, the rotation shaft and the rotation part (50) of the motor (71) can be connected to each other through a reduction gear, and in this embodiment, the reduction gear can be a worm (72) and a worm wheel (73).

[0078] The worm (72) is connected to the rotational axis of the motor (71), and the worm wheel (73) is coaxially connected to the rotational part (50) and meshes with the worm (72). The motor (71) has a very high rotational speed due to its characteristics. However, in the present invention, the rotational speed of the rotational part (50) does not have to be the same as the rotational axis of the motor (71), and a reduction gear can be used to lower the torque and rotational speed of the rotational part (50). In the present invention, the reduction gear is a worm gear including a worm (72) and a worm wheel (73). In the worm gear, two axes (worm and worm wheel) are perpendicular to each other, and the worm (72) rotates the worm wheel (73) as it rotates, thereby transmitting power. The worm gear can obtain a large reduction ratio, and the reduction gear of the worm gear is determined according to the number of strings of the worm (72) and the number of teeth of the worm wheel (73). In general, worm gears can achieve a reduction ratio of about 1 / 5 to 1 / 70. Due to the nature of worm gears, the worm wheel (73) rotates only when the worm (72) rotates, and even if the worm wheel (73) rotates, the worm (72) does not rotate due to the large reduction ratio and resistance. In the embodiment illustrated in Fig. 3, the reduction gear is implemented as a worm gear, but the present invention is not limited to the type of reduction gear thereto, and various types of reduction gears can be configured to connect the motor (71) and the rotating part (50) to each other.

[0079] A cable management device according to one embodiment of the present invention may further include a winding sensor.

[0080] The winding sensor is a sensor that determines whether the rotation of the rotating part (50) is performed in the same manner as the operation of the motor (71). In the present invention, if the rotation of the motor (71) and the sensing value of the winding sensor do not match within a certain range, the control unit may determine that the cable (60) is caught on the user's foot or an obstacle, or a foreign substance is caught in the inlet (74) of the case (70), and stop the operation of the motor (71). The winding sensor may be implemented by comparing the rotation speed of the motor (71) with the rotation speed of the rotating part (50). However, the present invention is not limited to the implementation of the winding sensor by comparing the rotation speed of the motor (71) with the rotation speed of the rotating part (50), and the winding sensor may be implemented in other ways.

[0081] A cable management device according to an embodiment of the present invention may further include a foreign matter inflow sensor. The foreign matter inflow sensor senses foreign matter inflow into the inlet (74) formed in the case (70). Foreign matter that may be inflowed into the case (70) may include the clothes or hands of the charger user, and in addition, various types of trash may be inflowed together during the storage process of the cable (60). The foreign matter inflow sensor may sense foreign matter inflow into the case (70) through the inlet (74) using a type of image processing method, and the control unit may stop the operation of the motor (71) if foreign matter other than the cable (60) is inflowed into the case (70) based on the sensing value of the foreign matter inflow sensor.

[0082] FIG. 4 illustrates a state in which the cables of a charger equipped with an electric vehicle charger cable organizing device according to one embodiment of the present invention are organized.

[0083] As illustrated in FIG. 4, a organizing portion (41) is installed on the charger (40), so that the cable (60) can be wound around the portion to a certain extent, thereby preventing the cable (60) from being dragged on the ground. The organizing portion (41) may be formed to extend in a shape that includes a curved surface in cross-section, and may be configured so that the cable (60) is positioned on the curved portion. The organizing portion (41) may be installed on the charger (40) and may be installed rotatably. The organizing portion (41) may be fixed on the charger (40) so as to have a frictional force of a certain degree or greater, so that rotational movement is only possible when a force of a certain degree or greater is applied, or it may be fixed so that rotation is only possible when a separate button is pressed.

[0084] As described above, in the present invention, the motor (71) and the rotating part (50) are connected to each other through a worm (72) and a worm wheel (73). As described above, the rotating part (50) may be a ratchet wheel. In the case of a general ratchet wheel, when the rotating part (50) is rotated by a user, the rotation axis of the rotating part (50) also rotates, and the worm wheel (73) connected thereto must also rotate. However, since the worm wheel (73) is engaged with the worm (72), it does not rotate, and therefore the rotating part (50) cannot be rotated by the user. This will be described in detail with reference to the drawings.

[0085] Fig. 5 is a perspective view of a ratchet wheel of a general structure, and Fig. 6 is a front view of Fig. 5.

[0086] As shown in FIGS. 5 and 6, a typical ratchet wheel includes a driving wheel (10), a driven wheel (20), and a reverse rotation prevention pawl (30).

[0087] The driving wheel (10) is a part that is connected to the motor and rotates directly by the rotation of the motor, and has a ratchet gear formed on the outer surface.

[0088] The driven wheel (20) is formed coaxially with the driving wheel (10) and has a larger diameter than the driving wheel (10). On both sides of the driven wheel (20), a reverse rotation prevention pawl (30) is configured to be rotatable on the driving wheel (10) side.

[0089] At least two reverse rotation prevention pawls (30) are connected to one side of the driving wheel (10) so that they can rotate at least once. The reverse rotation prevention pawl (30) has its end hooked to a ratchet gear formed on the outside of the driving wheel (10), so that when the driving wheel (10) rotates clockwise, the driven wheel (20) rotates together with the driving wheel (10), and when the driving wheel (10) rotates counterclockwise, it serves to prevent the rotational power of the driving wheel (10) from being transmitted to the driven wheel (20). A situation in which a user pulls a cable to rotate the ratchet wheel can be said to be a situation in which the driven wheel (20) rotates counterclockwise, in which case the rotational power of the driven wheel (20) is transmitted to the driving wheel (10) by the reverse rotation prevention pawl (30). However, when the worm wheel (73) is coupled to the driving wheel (10), the worm (72) does not rotate in accordance with the rotation of the worm wheel (73). That is, when the worm wheel (73) meshed with the worm (72) is coupled to the driving wheel (10), the driven wheel (20) cannot rotate counterclockwise.

[0090] Fig. 7 is an exploded perspective view of a rotating part used in a cable management device according to one embodiment of the present invention.

[0091] As shown in Fig. 7, the ratchet wheel, which is the rotating part (50) in this embodiment, includes a driving side wheel (100), a first driven side wheel (210), a pole (400), and a second driven side wheel (310).

[0092] The driving wheel (100) has a ratchet gear (110) formed on the outer surface and is connected to a driving unit and rotates according to the operation of the driving unit. Here, the driving unit may be a motor (71). The driving wheel (100) serves to transmit the rotational motion by the motor (71) to the second driven wheel (310), and when transmitting the rotational motion from the driving wheel (100) to the second driven wheel (310), the rotational direction may be clockwise when looking at the driving wheel (100) from the lower left of FIG. 7. The second driven wheel (310) may be a portion exposed to the outside of the case (70) in FIG. 2.

[0093] The first driven wheel (210) is coaxially connected to the driving wheel (100). The first driven wheel (210) may have an outer protrusion (212) formed so that the outer surface protrudes toward the driving wheel (100). The first driven wheel (210) may include a hole (211) formed to penetrate in the direction of the rotation axis. A plurality of holes (211) included in the first driven wheel (210) may be formed to be spaced apart from each other at a certain angle with respect to the rotation axis, and as shown in FIG. 5, a total of four holes (211) may be formed. The distance from the center of the first driven wheel (210) (center of the rotation axis) to the hole (211) may be longer than the distance from the center of the driving wheel (100) to the outer end of the ratchet gear (110). That is, when the driving side wheel (100) and the first driven side wheel (210) are coupled to each other, the hole (211) can be located outside in the outer circumferential direction than the driving side wheel (100).

[0094] The pole (400) may be formed to be rotatable on one side of both sides of the first driven wheel (210) in the direction of the driving wheel (100). The number of poles (400) may be the same as the number of holes (211) described above, and the poles (400) may be arranged adjacent to the holes (211). In the present embodiment, as illustrated in FIG. 5, four poles (400) may be formed at a constant angular interval around the rotation axis. In order for the pole (400) to rotate, there must be a part that serves as the rotation axis. To this end, a rotation protrusion (213) into which the pole (400) is inserted may be formed on one side of both sides of the first driven wheel (210) in the direction of the driving wheel (100) so that the pole (400) can rotate. The number of rotating protrusions (213) can also be formed in the same manner as the number of poles (400), and as shown in Fig. 7, a total of four rotating protrusions (213) can be formed.

[0095] When the driving wheel (100) is rotated clockwise by the driving unit, the end of the pawl (400) is caught by the ratchet gear (110), so that the clockwise rotational motion of the driving wheel (100) is transmitted to the first driven wheel (210) and the second driven wheel (310). Conversely, when the driving wheel (100) is rotated counterclockwise by the driving unit, the pawl (400) is not caught by the ratchet gear (110), so that the rotational motion of the driving wheel (100) is not transmitted to the first driven wheel (210) and the second driven wheel (310).

[0096] As illustrated in FIG. 7, the second driven wheel (310) is formed coaxially with the first driven wheel (210). In addition, the second driven wheel (310) includes a releaser (311) that is protrudingly formed on one side of the first driven wheel (210) among both sides. In the present embodiment, a total of four releasers (311) are arranged at a constant angular interval and are inserted into the hole (211) described above when all members are joined. The releaser (311) serves to rotate the pawl (400) so that it is not caught by the ratchet gear (110) when the second driven wheel (310) rotates counterclockwise, and the ratchet wheel according to the present invention prevents the counterclockwise rotational movement of the second driven wheel (310) from being transmitted to the driving wheel (100) through the operation of the releaser (311).

[0097] In the above description, it was explained that the driving wheel (100), the first driven wheel (210), and the second driven wheel (310) are formed coaxially with each other. However, this does not mean that the driving wheel (100), the first driven wheel (210), and the second driven wheel (310) are connected to each other by a rotational axis so that they always rotate simultaneously, but it only means that the positions of the first driven wheel (210) and the second driven wheel (310) are coaxial with the driving wheel (100). To this end, although not shown in the drawing, a separate shaft may be inserted into a rotational axis hole formed in each of the first driven wheel (210) and the second driven wheel (310) so as not to be physically connected to the first driven wheel (210) and the second driven wheel (310).

[0098] FIG. 8 is a front view of a cable management device according to an embodiment of the present invention when no external force is applied to the ratchet wheel, and FIG. 9 is a front view of a second driven wheel of the ratchet wheel according to the first embodiment of the present invention when it rotates counterclockwise.

[0099] As illustrated in FIGS. 8 and 9, the releaser (311) is shaped such that the outer peripheral end of the second driven wheel (310) extends toward the pole (400). As the outer peripheral end of the second driven wheel (310) extends toward the pole (400), the releaser (311) rotates so that the end of the pole (400) is not caught by the ratchet gear (110) when the second driven wheel (310) rotates counterclockwise, as illustrated in FIG. 9, thereby preventing the counterclockwise rotational movement of the second driven wheel (310) and the first driven wheel (210) from being transmitted to the driving wheel (100).

[0100] The state illustrated in FIG. 9 may be a state in which an external force is applied to the second driven wheel (310). However, if the state is changed to a state in which an external force is not applied to the second driven wheel (310), the state illustrated in FIG. 9 should be changed to the state illustrated in FIG. 8 so that when the motor (71) rotates the driving wheel (100), the rotational motion can be transmitted to the first driven wheel (210) and the second driven wheel (310). To this end, as illustrated in FIG. 7, the ratchet wheel according to the first embodiment of the present invention further includes a spring spring (500), and in addition, as illustrated in FIGS. 8 and 9, further includes an elastic member (700).

[0101] The mainspring (500) is located between the first driven wheel (210) and the second driven wheel (310), and one end is connected to the first driven wheel (210), and the other end is connected to the second driven wheel (310). The mainspring (500) may be formed of metal so as to have elasticity. The mainspring (500) plays the same role as a general mainspring. That is, when an external force is applied to the second driven wheel (310) and the second driven wheel (310) rotates counterclockwise, the mainspring (500) is compressed in the rotational direction to store elastic energy, and when an external force is not applied to the second driven wheel (310), the mainspring (500) is released in the clockwise direction to return the second driven wheel (310) to its original position.

[0102] Since the mainspring (500) has a certain thickness, sufficient space is required for the mainspring (500) to be positioned. As illustrated in FIG. 3, in the ratchet wheel according to the first embodiment of the present invention, the mainspring (500) is positioned in a seating space (313) formed by recessing one side of the second driven wheel (310) toward the first driven wheel (210). However, the present invention is not limited to the location of the mainspring (500) to the settling space (313) formed in the second driven wheel (310), and it is also possible to have the mainspring (500) positioned in a space where one side of the first driven wheel (210) in the direction of the second driven wheel (310) is sunken, or both sides of the first driven wheel (210) and the second driven wheel (310) facing each other are sunken to form a space where the mainspring (500) is settling.

[0103] However, even if the spring (500) returns the second driven wheel (310) to its original position, since the pawl (400) itself is not affected by the spring (500), the pawl (400) located at the lower side based on the direction of gravity may not return to its original position, and if the pawl (400) is not engaged with the ratchet gear (110), there is a problem that the rotational motion of the driving wheel (100) may not be transmitted to the first driven wheel (210) and the second driven wheel (310). The elastic member (700) plays a role in returning the pawl (400) that has rotated in this way to its original position. More specifically, as illustrated in FIGS. 4 and 5, the elastic member (700) has a shape like a kind of bracket, and when no external force is applied, it supports the pawl (400) by being coupled to the inner surface of the outer protrusion (212). The elastic member (700) is positioned between the pole (400) and the outer protrusion (212) and is compressed when the second driven wheel (310) rotates counterclockwise and the releaser (311) pushes and rotates the pole (400). Afterwards, when the external force applied to the second driven wheel (310) is removed, the elastic member (700) expands and returns the pole (400) to its original position, so that it is engaged with the ratchet gear (110).

[0104] The elastic part (700) illustrated in FIGS. 8 and 9 is a type of bracket shape, but the present invention is not limited to the shape of the elastic part (700), and a part such as a spring may be used, or a separate elastic member such as rubber or silicone may be installed at the position of the elastic part (700) to function as the elastic part (700).

[0105] The second driven wheel (310) may have a recessed outer surface and may include a winding portion (312) on which a cable is wound. The winding portion (312) may have a curved surface, which may be to minimize damage to the wound cable and to guide the cable wound around the winding portion (312) to the center.

[0106] The ratchet wheel according to the present invention can be used by being connected to the power cable of a corded vacuum cleaner, or by being connected to the charging cable at an electric vehicle charging station. That is, when the cable is wound around the winding member (312), when the user pulls the cable, the second driven wheel (310) rotates counterclockwise, releasing the wound cable. During this process, the releaser (311) pushes and rotates the pole (400), thereby preventing the rotational motion of the second driven wheel (310) from being transmitted to the driving wheel (100).

[0107] As shown in FIGS. 7 to 9, in the ratchet wheel, which is the rotating part (50) of the present embodiment, the driving wheel (100) includes an insertion hole (120) formed through the center, and the buffer part (130) may include a buffer part (130) that is inserted into the insertion hole (120) and is connected to the rotational axis of the driving part to rotate the driving wheel (100) according to the rotation of the rotational axis of the driving part.

[0108] As shown in FIGS. 7 to 9, in this embodiment, the buffer portion (130) may include a recessed portion (131), and the driving side wheel (100) may include an insertion portion (121).

[0109] The recessed portion (131) is a portion that is recessed and formed on the outer surface of the buffer portion (130), and the insertion portion (121) is a portion that protrudes to a certain extent from the inner surface of the insertion hole toward the center and is inserted into the recessed portion (131), but is formed to be smaller than the recessed portion (131). The sizes at which the recessed portion (131) and the insertion portion (121) are formed can be expressed as a predetermined angular range based on the rotation axis, and the fact that the insertion portion (121) is formed to be smaller than the recessed portion (131) means that the angle at which the insertion portion (121) is formed is smaller than the angle at which the recessed portion (131) is formed. That is, the insertion portion (121) moves inside the recessed portion (131) according to the rotation of either the buffer portion (130) or the driving wheel (100). This is to prevent the driving wheel (100) from rotating to a certain degree due to interference of the ratchet gear (110) by the rotating pole (400) when the releaser (311) pushes the pole (400) and rotates the pole (400). This is to prevent the driving wheel (100) from rotating to a certain degree from being transmitted to the driving unit, and to make the rotation of the pole (400) more smooth.

[0110] In the present embodiment illustrated in FIGS. 7 to 9, a recessed portion is formed on the outer surface of the buffer portion (130), and an insertion portion (121) is formed on the inner surface of the insertion hole of the driving wheel (100). However, the present invention is not limited to the combined structure of the buffer portion (130) and the driving wheel (100), and it is of course possible to have an embodiment in which an insertion portion is formed on the outer surface of the buffer portion (130), and a recessed portion is formed on the inner surface of the insertion hole of the driving wheel (100).

[0111] As illustrated in FIG. 7, the ratchet wheel, which is the rotating part (50) of the present embodiment, may further include a bearing (600).

[0112] The bearing (600) is intended to reduce the frictional force of the second driven wheel (310), and is inserted into a shaft located in the rotational axis hole of the second driven wheel (310), thereby reducing the frictional force generated between the shaft and the second driven wheel (310).

[0113]

[0114] Although preferred embodiments of the present invention have been described above, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but rather to explain it. Therefore, the technical spirit of the present invention includes not only each disclosed embodiment but also a combination of disclosed embodiments, and further, the scope of the technical spirit of the present invention is not limited by these embodiments. In addition, those skilled in the art to which the present invention pertains can make numerous changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications should be considered as equivalents and falling within the scope of the present invention.

[0115]

[0116] This invention is a result of the following national research and development project.

[0117] 1. Assignment ID: 1415186770

[0118] 2. Subproject number: 20222020800190

[0119] 3. Ministry Name: Ministry of Trade, Industry and Energy

[0120] 4. Project Management (Specialist) Agency Name: Korea Institute of Energy Technology Evaluation and Planning

[0121] 5. Research Project Name: Energy Demand Management Core Technology Development Project

[0122] 6. Research Project Name: Development and Demonstration of a 600kW Automatic Charging System for a 50-Vehicle Parking Tower, Capable of Simultaneously Charging 8 Vehicles to Accelerate Carbon Neutrality

[0123] 7. Name of the project performing organization: Everon Co., Ltd.

[0124] 8. Research Period: April 1, 2022 - March 31, 2026.

Claims

1. A rotating part that is installed on the charger and winds the cable, and when the user pulls the cable, it rotates to unwind the wound cable; A motor that rotates the rotating part according to control and winds the cable around the rotating part; and A control unit for controlling the above motor; Including, but not limited to, The above control unit, An electric vehicle charger cable management device, which controls the motor to wind the cable around the rotating member when the cable is not in use and no force is applied to the connector located at the end of the cable.

2. In paragraph 1, An acceleration sensor for sensing movement of the above connector; Including more, The above control unit, An electric vehicle charger cable management device that controls the motor based on the sensing value of the acceleration sensor.

3. In paragraph 2, The above control unit, An electric vehicle charger cable management device that controls the motor to wind the cable around the rotating part when the connector does not move for a reference time or longer through the acceleration sensor.

4. In paragraph 1, A roller arranged between the rotating part and the connector to change the direction in which the cable is drawn out; An electric vehicle charger cable management device further comprising:

5. In paragraph 1, A reduction gear installed between the rotation shaft of the above motor and the above rotating part; An electric vehicle charger cable management device further comprising:

6. In paragraph 5, The above reduction gear is, a worm connected to the rotation shaft of the above motor; and A worm wheel that is interlocked with the worm and rotates according to the rotation of the worm, and is connected to the rotating part; An electric vehicle charger cable management device comprising:

7. In paragraph 1, A winding sensor that senses the degree to which the cable is wound around the rotating part due to the operation of the motor; Including more, The above control unit, An electric vehicle charger cable management device that stops the operation of the motor if the rotational degree of the motor and the sensing value of the winding sensor do not match by a certain degree or more.

8. In paragraph 1, A case in which the above cable is introduced and withdrawn; and A foreign matter inflow sensor that senses a substance flowing into the inside of the case; Including, The above control unit, An electric vehicle charger cable management device that stops the operation of the motor when, when the motor operates and the cable is wound around the rotating part, it is determined that a substance other than the cable has entered the case based on the sensing value of the foreign substance inflow sensor.

9. In paragraph 1, The above rotating part, An electric vehicle charger cable management device having a ratchet wheel to prevent rotation in the opposite direction of the direction in which the user pulls the cable.

10. In paragraph 9, The above ratchet wheel, A driving wheel having a ratchet gear formed on the outer surface and connected to a driving unit and rotating according to the operation of the driving unit; A first driven wheel positioned coaxially with the driving wheel and formed on the outer side of the driving wheel, the first driven wheel including a plurality of holes passing through the wheel at a predetermined angle from each other; A pawl formed so as to be rotatable on one side of the first driven wheel in the direction of the driving wheel, and positioned adjacent to the hole, and when the driven wheel rotates clockwise, is engaged with the ratchet gear so that the clockwise rotation of the driven wheel is transmitted to the first driven wheel; and A second driven wheel formed coaxially with the first driven wheel and including a releaser protrudingly formed on one surface of the first driven wheel, the releaser being inserted into the hole; Including, but not limited to, An electric vehicle charger cable management device, wherein when the second driven wheel rotates counterclockwise, the releaser rotates so that the pawl does not get caught by the ratchet gear.

11. In paragraph 10, A spring positioned between the first driven wheel and the second driven wheel, having one end connected to the first driven wheel and the other end connected to the second driven wheel, and returning the second driven wheel to its original position when no external force is applied to the second driven wheel; An electric vehicle charger cable management device further comprising:

12. In paragraph 11, At least one of the first driven side wheel and the second driven side wheel, A seating space in which the mainspring is seated, with the surfaces facing each other sunken; An electric vehicle charger cable management device comprising:

13. In paragraph 10, The above second type of wheel is, An electric vehicle charger cable management device including a winding portion formed in a recessed shape on an outer surface to allow a cable to be wound.

14. In paragraph 10, The above driving side wheel is, Includes an insertion hole formed through the center portion, A buffer part inserted into the insertion hole and connected to the rotational shaft of the driving part to rotate the driving side wheel according to the rotation of the rotational shaft of the driving part; An electric vehicle charger cable management device comprising:

15. In paragraph 14, The above buffer section, A depression formed on the outer surface; Including, The above driving side wheel is, An insertion portion formed to protrude to a certain extent toward the center of the inner surface of the insertion hole and inserted into the recessed portion, but formed to be smaller than the recessed portion; An electric vehicle charger cable management device comprising:

16. In paragraph 14, The above buffer section, An insert formed on the outer surface protruding in a vertical direction from the outer surface; Including, The above driving side wheel is, A recessed portion formed toward the outside on the inner surface of the insertion hole, into which the insertion portion is inserted, but which is formed larger than the insertion portion; An electric vehicle charger cable management device comprising:

17. In paragraph 10, The above first-type side wheel is, A rotating protrusion formed by protruding in the direction of the driving side wheel on one side of the two sides, into which the pole is inserted to form a rotating axis of the pole; An electric vehicle charger cable management device comprising:

18. In paragraph 10, The above first-type side wheel is, An outer protrusion formed such that the outer protrusion protrudes in the direction of the driving wheel; and An elastic member that is coupled to the inner surface of the outer projection to support the pole, is compressed by the pole when the second driven wheel rotates counterclockwise so that the releaser rotates the pole, and expands when the external force applied to the second driven wheel is eliminated to return the pole to its original position; An electric vehicle charger cable management device comprising:

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