JP2014044847A - Charging port control device for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging port control device for an electric vehicle, which can avoid sudden release of connection between a charging port and a charging connector during charging, and has excellent durability.SOLUTION: A charging port control device for an electric vehicle can be switched to a locked state and an unlocked state by an operation of a restriction member when performing charging by a charging connector having an engaging member. At this time, when moving the restriction member to a predetermined position that is in the locked state or the unlocked state, the charging port control device comprises: an electrical drive mechanism for moving the restriction member to a position at a near side from the predetermined position by electrically adding torque by a motor; and a mechanical drive mechanism for moving the restriction member from the near side position to the predetermined position by mechanically adding torque. When the restriction member is energized and driven, energization and non-energization are intermittently repeated, and a non-energization time period is set to be equal to or longer than a time period which is required for the restriction member to return to an operation start position by the mechanical drive mechanism.

Description

  The present invention relates to a charging port control device for an electric vehicle for charging a battery mounted on the vehicle.

  As a technique related to a charging port control device for an electric vehicle, a technique described in Patent Document 1 is disclosed. This publication discloses a charging connector that connects a charging port of an electric vehicle and a charging stand that is a power supply means, and includes a link 41 that is rotatably provided in conjunction with an operator's button operation, Engaging with the protrusion 34 in the charging inlet 11 prevents the charging connector and the charging inlet from coming off during charging. In addition, a configuration including a slide-type lock bar (hereinafter referred to as a lock mechanism) that disables the rotation of the link 41 in order to prevent the charging cable from being removed and stolen during charging is also disclosed. .

JP 2010-264847 A

  Here, when the above-described lock mechanism is operated by a motor, if the motor and the lock bar are always interlocked, an excessive load is applied to the motor, the link mechanism, and the like, and there is a problem in durability.

  The present invention has been made paying attention to the above-mentioned problem, and can prevent the connection between the charging port and the charging connector from being unexpectedly released during charging, and has excellent durability. An object of the present invention is to provide a charging port control device.

  In order to achieve the above object, in the charging port control device for an electric vehicle according to the present invention, the charging can be switched between the locked state and the unlocked state by the operation of the limiting member when charging is performed by the charging connector having the engaging member. At this time, when the restricting member is moved to a predetermined position that is in a locked state or an unlocked state, an electric drive mechanism that is moved by electrically applying torque to a position closer to the front side than the predetermined position; A mechanical drive mechanism that moves by mechanically applying torque from the near side position to the predetermined position, and intermittently energizes and deenergizes the energizing drive of the limiting member. At the same time, the non-energization time is set to be longer than the time required for the limiting member to return to the operation start position by the mechanical drive mechanism.

  Therefore, since the entire operating range of the limiting member is not operated by the motor, it is possible to avoid an excessive load from acting on the limiting means, and it is possible to improve durability. If the restricting member cannot be rotated to a position where the restricting member can achieve the locked state due to the influence of the obstacle or the like when the restricting member is driven, the energization and the non-energization are repeated intermittently to obstruct the object. On the other hand, a load by the limiting member is repeatedly applied. Thereby, an obstacle etc. can be removed and a limiting member can be rotated to the position which can achieve a locked state. The restricting member whose movement is hindered by an obstacle or the like is returned to a predetermined position where the restricting member is unlocked by the mechanical drive mechanism. Therefore, when the energization and deenergization are repeated intermittently, the deenergization time is set to the time required to return to the unlocked state where the restriction member is the operation start position, so that the restriction member can A load can be applied with a large rotation, and obstacles and the like can be effectively removed.

It is the schematic showing the mode at the time of charge of the vehicle provided with the charge port control apparatus of the electric vehicle of Example 1. FIG. It is a schematic sectional drawing showing the state which connected the connector for charge of Example 1 and the charge port. It is a side view showing the structure of the locking mechanism of Example 1. FIG. FIG. 3 is a bottom view illustrating the configuration of the lock mechanism according to the first embodiment. It is an internal structure figure showing the machine composition of the lock mechanism of Example 1. It is a bottom view showing the structure of the swing arm of the lock mechanism of Example 1. It is a schematic perspective view in the state where the connector for charge and the charge port of Example 1 were connected. It is a perspective view in the state where the connector for charge and the charge port of Example 1 were connected. 3 is a schematic cross-sectional view illustrating a positional relationship between an engaging member and a swing arm according to Embodiment 1. FIG. It is a schematic sectional drawing showing the positional relationship of an engaging member and a swing arm when the engaging member of Example 1 is forcibly operated in the separation direction. It is a schematic explanatory drawing of the part provided with the toggle spring of Example 1. FIG. FIG. 3 is a schematic diagram illustrating a mechanical operation of the toggle spring according to the first embodiment. FIG. 6 is a characteristic diagram illustrating a positional relationship between a toggle spring and a torque acting range of a motor and a swing arm according to the first embodiment. FIG. 3 is a schematic top view showing the positional relationship between the engaging member and the swing arm according to the first embodiment. It is the figure which removed the worm wheel, the drive gear, and the driven member from the internal structure figure showing the mechanical structure of the lock mechanism shown in FIG. 3 is a perspective view of a switch member of Example 1. FIG. FIG. 3 is a schematic diagram illustrating an energized state by a switch member of Example 1. 3 is a time chart showing an energization drive state for the lock mechanism of the first embodiment. It is the schematic showing the position of the electricity supply terminal of Example 1, and the operating state of an electricity supply terminal.

[Example 1]
FIG. 1 is a schematic diagram illustrating a state in which a vehicle including the charging port control device for an electric vehicle according to the first embodiment is charged. In front of the vehicle 3 and in front of the hood hood 31, a charging port 4 electrically connected to the in-vehicle battery 6 mounted on the floor of the vehicle 3 by a cable 43 is provided. The charging port 4 is provided at a position that is substantially the same height as the upper end of the tire wheel arch 33 and lower than the side mirror 34, and is closed by the charging lid 32 when not charged. The charging stand 1 is provided with a charging connector 2 for supplying power, and at the time of charging, charging is performed by opening the charging lid 32 and inserting the charging connector 2 into the charging port 4 for connection. The vehicle according to the first embodiment has both a quick charge port when connected to a quick charger and a normal charge port when charged with household electricity. In the case of the first embodiment, the vehicle is normally charged. A port will be described as an example. This is because when using the quick charge port, the connection is relatively short, and there are few scenes where it is left for a long time. Needless to say, a lock mechanism may be provided on the quick charge port side.

  FIG. 2 is a schematic cross-sectional view illustrating a state where the charging connector and the charging port according to the first embodiment are connected. The charging port 4 includes an inserted member 41 that is fixed to the vehicle body side via the bracket 74 to the body component B1 and the charging connector 2 is inserted, a cable 43 that is connected to the inserted member 41 on the inner side of the vehicle body, And a tube 42 that covers the connecting portion of the cable 43. A convex portion 41 a (engaged portion) is formed on the outer periphery of the inserted member 41, and an insertion hole that can be inserted only in a predetermined positional relationship with the insertion portion 22 is formed on the inner periphery of the inserted member 41. Yes.

  The charging connector 2 is a type that is generally widely installed, is a standard product whose format and size are determined by a unified standard, and is connected to the charging port 4 of the vehicle by an operator. The charging connector 2 can be engaged / released between the grip portion 21 held by the operator, the insertion portion 22 inserted into the charging port 4 on the vehicle side, and the charging port 4 by the operator. Engaging member 23. When the charging member 2 is connected to the charging port 4, the engaging member 23 engages with a convex portion 41 a provided on the charging port 4 side, thereby pulling out the charging connector 2 from the charging port 4. Regulate the movement of

  The engaging member 23 is a member that rotates around a support point 23 c fixed to the case member of the charging connector 2. The engaging member 23 is urged by an elastic body (not shown) so that the release button 23a is positioned upward in FIG. 2 (so that the claw portion 23d is positioned downward in FIG. 2). A release button 23 a that can be pressed while the operator holds the grip portion 21 is provided at an end portion on the grip portion 21 side. On the other hand, the end portion on the insertion portion 22 side has a claw portion 23d that engages with the convex portion 41a. The claw portion 23d has a key claw shape having a curved surface portion 23d1 having a smooth curved surface in the insertion direction and a step portion 23d2 having an acute angle with respect to the pulling direction. On the other hand, an inclined surface 41a1 is formed on the end surface on the vehicle body outside of the convex portion 41a, and an engagement surface 41a2 is formed on the end surface on the vehicle body inner side that is substantially perpendicular to the pulling direction, thereby forming an anisotropic convex shape. doing.

  When the charging connector 2 is inserted into the charging port 4, the curved surface portion 23d1 at the tip of the claw portion 23d can get over the slope of the convex portion 41a without operating the special release button 23a. Thereafter, when the step portion 23d2 passes through the engagement surface 41a2, the claw portion 23d is pushed downward by the action of an elastic body (not shown), and the claw portion 23d and the convex portion 41a are engaged. The charging connector 2 may be inserted while pressing the release button 23a. Thereby, even if the operator pulls the charging connector 2 in the direction in which the release button 23a is not operated, the movement in the extraction direction is restricted by the engagement between the step portion 23d2 and the engagement surface 41a2. . When releasing this engagement, the engagement member 23 is rotated about the support point 23c by pushing the release button 23a, and the claw portion 23d is moved above the engagement surface 41a2 to engage the engagement. Canceled.

FIG. 3 is a side view illustrating the configuration of the locking mechanism of the first embodiment, and FIG. 4 is a bottom view illustrating the configuration of the locking mechanism of the first embodiment.
Above the charging port 4, a lock mechanism 7 that restricts the rotation of the engaging member 23 is provided. The lock mechanism 7 achieves a state in which the claw portion 23d is positioned in the direction away from the convex portion 41a to limit the separation (hereinafter, locked state), and does not limit the separation by not being positioned in the separation direction ( Hereinafter, the swing arm 71 that achieves the unlocked state, a lock actuator 73 that drives the swing arm 71, and a bracket 74 that fixes and supports the lock actuator 73 and the inserted member 41 of the charging port 4 are provided.

  As shown in the side view of FIG. 3 and the bottom view of FIG. 4, the bracket 74 extends from the upper surface portion 74d so as to cover the movable range of the swing arm 71 by fixing the lock actuator 73 with the bolt 74e. The support extending portion 74b provided, the side surface portion 74c to which the inserted member 41 or the like is bent at a substantially right angle with respect to the upper surface portion 74d, and the side facing the upper surface portion 74d are attached. The cover member 74g is sandwiched between the upper surface portion 74d and the upper surface portion 74d. The upper surface portion 74d, the lock actuator 73, and the cover member 74g are integrally assembled by a plurality of bolts 74e and nuts 74f. The upper surface portion 74d is formed with a failure forced opening 74a capable of operating a fixing screw 72, which will be described later (see FIGS. 2, 7, etc.), and an operator can open the hood and turn it with a screwdriver or the like. ing. The reason will be described later. A toggle spring 100 that assists the operation of the swing arm 71 is provided between the support extending portion 74 b and the swing arm 71. The toggle spring 100 applies torque toward the position where the swing arm 71 is in the locked state from the position before the position where the swing arm 71 is in the locked state. Similarly, torque is applied from a position before the swing arm 71 is unlocked to a position where the swing arm 71 is unlocked. Details of the toggle spring 100 will be described later.

  FIG. 5 is an internal structure diagram illustrating a mechanical configuration of the lock mechanism according to the first embodiment. The lock actuator 73 includes a connector portion 73a connected to an external power source and a controller, a motor 731 that is rotationally driven based on a command signal, a worm 732 that rotates integrally with the rotor of the motor 731, and a worm that meshes with the worm 732 and rotates. A wheel 734, a drive gear 734a that is smaller in diameter than the worm wheel 734 and has the same rotational axis as the worm wheel 734, and that rotates relative to the worm wheel 734, and a driven member 735 that meshes with the drive gear 734a and has a tooth surface on the outer periphery. And having. Engaging convex portions 7341 that are partially raised are provided on the surface of the worm wheel 734, and an engaged portion 734a1 extending in a substantially fan shape is formed on the outer diameter of the drive gear 734a. When the worm wheel 734 rotates, the engaging convex portion 7341 also rotates. At this time, the drive gear 734a does not rotate in a state where the engagement convex portion 7341 and the engaged portion 734a1 are not engaged. When the engaging convex portion 7341 and the engaged portion 734a1 are engaged, the driving gear 734a starts rotating. This operation is the same whether the worm wheel 734 rotates clockwise or counterclockwise in FIG.

  In the first embodiment, the swing arm 71 is rotated by the torque of the motor 731 from the position where the swing arm 71 is locked or unlocked to the near side (corresponding to an electric drive mechanism). The swing arm 71 is rotated by the torque of the toggle spring 100 until it reaches a position where the state is unlocked or unlocked (corresponding to a mechanical drive mechanism). At this time, the driven member 735 is further rotated by the torque of the toggle spring 100. Then, the engaging projection 7341 of the worm wheel 734 that operates integrally with the motor 731 rotates in a direction in which the engaged portion 734a1 that operates integrally with the driven member 735 moves away, so the movement of the motor 731 is This rotation is not affected. With this configuration, even if the motor 731 has an abnormality and cannot be rotated, it can be easily rotated when the swing arm 71 is rotated and released manually. It can be done. The relationship with the toggle spring 100 will be described later.

  The driven member 735 has a meshing portion 735a having a substantially sector shape and a tooth surface formed on the outer periphery, and a rotating shaft portion 735b assembled to be integrated with the swing arm 71. The swing arm 71 is a member that operates using the rotation shaft portion 735b as a rotation shaft. In other words, the swing arm 71 is in a direction different from the insertion / removal direction of the charging connector 2 and is different from the rotation axis direction of the engagement member 23. Has a pivot axis. In the lock mechanism of the first embodiment, since the swing arm 71 only needs to operate within a predetermined angle range, by using the driven member 735 having a tooth surface partially, an operation that secures torque even with a small motor 731 is achieved. realizable. An elongated hole 735c is formed between the meshing portion 735a of the driven member 735 and the rotating shaft portion 735b, and an engaging portion 739a of a switch member 739 described later is inserted into the elongated hole 735c. Thus, when the driven member 735 rotates, a force in the rotation direction acts on the engaging portion 739a, and the switch member 739 also rotates in conjunction with it. Details of the operation of the switch member 739 will be described later. The lock actuator 73 is also used in an automatic door lock mechanism of a general vehicle, and the manufacturing cost can be reduced by diverting these parts as they are.

  FIG. 6 is a bottom view illustrating the configuration of the swing arm of the lock mechanism according to the first embodiment. The swing arm 71 includes an attachment portion 710 attached so as not to rotate relative to the rotation shaft portion 735b of the lock actuator 73, and a cylindrical cylindrical wall 713 covering the outer periphery of the attachment portion 710. Three concave portions 712 are formed on the circumference of the attachment portion 710, and the convex portion formed on the rotating shaft portion 735b side is fitted into the concave portion 712, thereby restricting relative movement in the rotational direction. A through hole 711 is formed at the center of the attachment portion 710, and a fixing screw 72 for fixing the swing arm 71 and the rotation shaft portion 735 integrally therethrough. Since the through-hole 711 makes the upper part of the swing arm 71 and the lock actuator 73 side communicate with each other, the operation of the swing arm 71 becomes difficult due to freezing or the like. It also functions as a flow passage through which hot water circulates to quickly improve the frozen state. The fixing screw 72 is screwed by a female screw portion provided on the rotating shaft portion 735 side, whereby the rotating shaft portion 735 and the swing arm 71 are integrally operated.

  Here, the fastening direction of the fixing screw 72 is set to be the same as the direction in which the swing arm 71 rotates in the unlocking direction. That is, even if a failure or the like occurs in the lock actuator 73 and the release operation cannot be performed at all, the swing arm 71 can be rotated in the release direction by tightening the fixing screw 72. Because.

  FIG. 7 is a schematic perspective view of the charging connector and the charging port according to the first embodiment in a connected state. Referring to FIG. 7 and FIG. 2 in detail, the fixing screw 72 is provided in the forcible operation opening 74a at the time of failure and so as to be exposed in the bonnet hood. To open the hood, the hood hood release lever in the passenger compartment is usually operated. If the release lever can be operated, the position can be easily accessed. In other words, the position cannot be accessed even if the charging lid 32 is opened. Therefore, it is devised so that others who cannot access the passenger compartment cannot operate it without permission. Moreover, since it can be easily operated by a plus driver or the like equipped on the in-vehicle tool or the like, it can be released by the operator.

  A plate-like arm member 71d extends from the cylindrical wall 713 on the left side in FIG. The arm member 71d is designed to expand in a fan shape at the tip and overlap the claw portion 23d in a top view (corresponding to being positioned in the engaging member separation direction). The arm member 71d is formed with a lightening portion 71d1 for reducing the weight and a rib 714 for ensuring a required strength.

  The swing arm 71 is formed of resin and is formed in an asymmetric shape in the top view as shown in FIG. Hereinafter, the rotation center of the swing arm 71 (the center of the swing arm 71 in the thickness direction coincides with the rotation axis) and the rotation center of the engagement member 23 in the locked state (the width direction of the engagement member 23). An axis 01 that is a line connecting the center of the axis and a point that coincides with the rotation axis) is a reference line in the top view, and a symmetrical virtual line that is symmetrical in the vertical direction is drawn with a dotted line, and explanation is based on the relationship with this symmetrical virtual line To do. In other words, the portion above the axis 01 is a region where the swing arm 71 escapes when shifting from the restricted state by the lock mechanism to the unrestricted state. Therefore, the area above the axis 01 is defined as the escape area and the area below is defined as the passing area.

  When the swing arm 71 is symmetrical in the escape area and the passage area, there are many areas located on the escape area side of the claw portion 23d. In this case, there are the following problems. That is, since the position of the charging port 4 is provided at a relatively low position of the vehicle, it is assumed that when another vehicle travels nearby, sherbet-like snow, muddy water, etc. is wound up and scattered into the charging port 4. Is done. Further, when charging is performed in a cryogenic environment, it is assumed that the scattered sherbet-like snow and muddy water are frozen, and a slab-like obstacle is formed using the arm member 71d of the swing arm 71 as a roof. In this case, when the area of the arm member 71d is wide in the escape area, it becomes easy to form a glazed obstacle or the like, and even if a lock release command is output, the obstacle of the swing arm 71 and the claw portion 23d are caught. The lock may not be released.

  Therefore, the arm member 71d is greatly scraped from the symmetrical virtual line to the vicinity of the claw portion 23d. In other words, the area 71d3 existing in the escape region of the arm member 71d (restricted with reference to a line connecting the rotation center of the swing arm 71 and the rotation center of the claw 23d when positioned in the separation direction of the claw 23d) Is the area 71d2 (the center of rotation when the claw portion 23d is in the separating direction) and the center of rotation of the claw portion 23d. With respect to the line connecting the two, the surface area of the upper surface in the direction of rotation to an unrestricted state is determined to be smaller. Therefore, the roof portion in the escape area can be made small, and it is difficult to form icicle-like obstacles, so that the swing arm 71 can be smoothly operated when unlocking. In particular, by scraping to the limit of the area overlapping with the claw portion 23d in a top view, it is possible to reduce the possibility that an obstacle or the like is further formed while reliably restricting the movement of the claw portion 23d in the separation direction.

  Next, in the top view shape of the outermost diameter portion 71f of the swing arm 71, the shape is symmetrical with the axis line 01 as the reference line. That is, when the swing arm 71 is rotated by the operation of the lock actuator 73, assuming that the swing arm 71 does not sufficiently rotate due to a failure or the like, the length of the outermost diameter portion 71f is secured more reliably. This is because the swing arm 71 can be positioned in the separation direction of 23d.

  FIG. 8 is a perspective view of the charging connector and the charging port according to the first embodiment in a connected state. The charging connector 2 is inserted into the charging port 4, the lock mechanism 7 is operated, and the swing arm 71 is positioned in the separation direction of the claw portion 23d, so that the claw portion 23d cannot move in the separation direction even if the release button 23a is pressed. . Accordingly, the engagement between the convex portion 41a and the claw portion 23d cannot be released, and the charging connector 2 is prohibited from being extracted. At this time, the charging port 4 of the vehicle is provided with a cover member 9 for protecting entry of dust and the like into the lock mechanism 7 and the like. The cover member 9 has an opening 91 that covers the lock mechanism 7 from the insertion / removal direction side of the charging connector 2 and into which the claw portion 23d can be inserted and a part of the swing arm 71 is exposed.

  It is assumed that the operator leaves the place and starts charging by inserting the charging connector 2 into the charging port 4 and operating the lock mechanism 7. At this time, as shown in FIG. 8, the outermost diameter portion 71f of the swing arm 71 is exposed. If the gap between the cover member 9 and the outermost diameter portion 71f is large, it is possible to forcibly open the swing arm 71 by inserting a finger or the like into the gap. Therefore, the gap between the swing arm 71 and the cover member 9 is set narrow so as not to contact.

  Further, in a state where the removal of the charging connector 2 is restricted by the lock mechanism 7, all the openings 91 are closed by the outermost diameter portion 71 f of the swing arm 71. In other words, the rotation direction length of the outermost diameter part 71f is set longer than the opening width (length in the rotation direction) of the opening 91. As described above, if there is a gap between the end of the opening 91 and the end of the swing arm 71, the swing arm 71 may be forcibly opened by inserting a finger or the like there. It is for eliminating.

  Furthermore, returning to FIG. 6, the relationship between the cover member 9 and the swing arm 71 will be described in detail. As shown in FIG. 6, the distance between the inner peripheral surface of the cover member 9 and the locus of the outermost diameter portion 71 f when the swing arm 71 rotates is set to increase as the distance from the opening 91 increases. ing. That is, when the charging connector 2 is connected to the charging port 4 with dust or the like (gum, mud, lump of dust, etc.) attached to the claw portion 23d, the swing arm 71 rotates to It will work while scraping (sweeping) garbage. At this time, if the interval between the inner peripheral surface of the cover member 9 and the locus of the outermost diameter portion 71f is set to be gradually narrowed, the scraped dust will fit into this interval, resulting in a large resistance. There is a possibility that the operation of the swing arm 71 may be hindered. Therefore, by setting the interval between the inner peripheral surface of the cover member 9 and the locus of the outermost diameter portion 71f to increase as the distance from the opening 91 increases, the scraped dust falls down appropriately. , Avoiding clogging of garbage.

  FIG. 9 is a schematic cross-sectional view illustrating the positional relationship between the engaging member and the swing arm according to the first embodiment. A predetermined gap a1 is provided between the upper surface of the swing arm 71 and the support extending portion 74b, and a predetermined gap b1 is also provided between the lower surface of the swing arm 71 and the claw portion 23d. Therefore, since the swing arm 71 does not come into contact with the support extending portion 74b and the claw portion 23d when the swing arm 71 rotates, the swing arm 71 can be operated smoothly. Here, when the height of the region where the stepped portion 23d2 and the engagement surface 41a2 overlap is c1, when viewed from the direction in which the charging connector 2 is inserted and removed, the relationship of c1> (a1 + b1) is established. . Therefore, even if the claw portion 23d is forcibly pushed up and the gaps a1 and b1 disappear as shown in FIG. 10, the engagement between the step portion 23d2 and the engagement surface 41a2 is maintained.

  FIG. 10 is a schematic cross-sectional view showing the positional relationship between the engaging member and the swing arm when the engaging member of Example 1 is forcibly operated in the separation direction. When the lock mechanism 7 is activated and the movement of the engaging member 23 in the separating direction is restricted, if the release button 23a is pushed in, the upper surface of the claw portion 23d comes into contact with the lower surface of the swing arm 71 and the swing arm 71 is pushed up. At this time, the swing arm 71 itself is made of resin, and the rotation shaft portion 735b of the lock actuator 73 is not so strongly designed. Therefore, the swing arm 71 is easily moved upward by deformation or tilting of the rotation shaft. Will be pushed up.

  However, since the support extending portion 74b is provided, further deformation is suppressed by contact with the support extending portion 74b. In addition, since only a force is applied in the thickness direction of the swing arm 71, even the resin swing arm 71 can ensure a sufficient strength against the compressive force. That is, the swing axis of the swing arm 71 has a rotation axis that is different from the insertion / removal direction of the charging connector 2 and that is different from the rotation axis direction of the engagement member 23. Furthermore, in other words, the rotation axis direction of the swing arm 71 and the rotation axis direction of the engaging member 23 are not in a parallel relationship, and the swing arm 71 is interposed and limited in the separating direction of the claw portion 23d, and The support extending portion 74b is provided. Therefore, even if an unreasonable force is input from the claw portion 23d, the swing arm 71 does not act in the turning direction, so that it is not necessary to make the swing arm 71 robust in the turning direction. Sufficient restricted state can be maintained without having to make the structure near the shaft robust.

  Next, the operation of the toggle spring will be described. FIG. 11 is a schematic explanatory diagram of a portion provided with the toggle spring of the first embodiment, FIG. 12 is a schematic diagram showing mechanical operation of the toggle spring of the first embodiment, and FIG. 13 is a torque of the toggle spring and motor of the first embodiment. It is a characteristic view showing the positional relationship of an action range and a swing arm. The horizontal axis represents the rotational position of the swing arm 71, and represents the position in the locked state (hereinafter referred to as the locked position), the position in the unlocked state (hereinafter referred to as the unlocked position), and the center position. The vertical axis represents the torque acting on the swing arm 71. The upper part of the vertical axis represents the toggle spring torque acting in the locking direction, and the lower part of the vertical axis represents the toggle spring torque acting in the unlocking direction.

  As shown in FIG. 11, the toggle spring 100 includes a coil portion 100a that generates elastic force, a swing arm side foot portion 101 that extends from the coil portion 100a and engages with the swing arm 71, and a swing arm side foot portion 101. The insertion portion 102 is bent in a substantially right angle direction and is rotatably inserted into an engagement hole 750 formed in the swing arm 71. Similarly, the toggle spring 100 includes a vehicle body side foot portion 103 that extends from the coil portion 100a and engages with the support extending portion 74b, and the vehicle body side foot portion 103 is bent in a substantially right angle direction to form a support extending portion 74b. An insertion portion 104 is rotatably inserted into the formed engagement hole 74b1.

  A description will be given corresponding to the schematic top view of FIG. FIG. 11 is a schematic view of the swing arm 71 viewed from the lateral direction in the neutral position, and the corresponding top surface configuration is a view shown in the neutral position portion of FIG. At this time, the toggle spring 100 is in a bent state. In this case, the toggle spring 100 tries to push and spread the respective foot portions 101 and 103, but the force acts in the radial direction with respect to the rotation center of the swing arm 71 and rotates the swing arm 71. Does not affect the direction.

  From this state, when the swing arm 71 is rotated in the locking direction by the motor 731, the coil portion 100 a is displaced downward in FIG. 12. As a result, the force that pushes and spreads the feet 101 and 103 of the toggle spring 100 has a rotational component in the locking direction of the swing arm 71, and the swing arm 71 is directed to the locked position by this torque. Is energized. Similarly, when the swing arm 71 is rotated in the unlocking direction by the motor 731, the coil portion 100a is displaced upward in FIG. As a result, the force that pushes and spreads the respective foot portions 101 and 103 of the toggle spring 100 has a rotational component in the unlocking direction of the swing arm 71, and the swing arm 71 is unlocked by this torque. It is energized towards.

  Thus, when the relationship between the rotation of the swing arm 71 and the operation of the toggle spring 100 is seen, it can be seen that the toggle spring 100 moves in the gap between the swing arm 71 and the support extending portion 74b. As these movements generate friction, the toggle spring 100 has a position where the insertion portion 74b1 and the insertion portion 750 are aligned with the swing arm rotation center (hereinafter referred to as a spring center position). A predetermined dead zone is generated in both directions around the center. In other words, if the toggle spring 100 does not rotate to some extent from when it is in the spring center position, it is not possible to generate a rotational torque that overcomes the friction.

  The relationship between the action of the toggle spring and the motor operation will be described in more detail with reference to the characteristic diagram of FIG. 13 and the schematic top view showing the positional relationship between the engaging member and the swing arm of FIG. In addition, the top view in Example 1 is substantially the same as that seen from the direction in which the claw portion 23d is separated from the engagement surface 41a2. As described in the lock mechanism, the motor 731 operates the swing arm 71 to the near side that reaches the lock position or the unlock position. At this time, the range in which the motor torque is output is a range from the unlock position to the predetermined lock region (hereinafter referred to as a first region) for the region acting in the lock direction. On the other hand, the region acting in the unlocking direction is a range from the lock position to the predetermined unlocking region beyond the center (hereinafter referred to as a second region).

  Here, since there is a dead zone in the toggle spring 100, if the operation of the motor 731 is stopped within this dead zone, the swing arm 71 cannot move due to the toggle spring force. Therefore, when operating the motor 731, the motor 731 is always driven to exceed the dead zone of the toggle spring 100. In other words, the motor 731 is controlled so that the first region and the second region overlap. The dead zone of the toggle spring 100 is formed at a position overlapping the overlapping region. Thereby, the swing arm 71 can be moved to the lock position or the unlock position by the torque of the toggle spring 100.

  Here, the positional relationship between the swing arm 71 and the claw 23d when the swing arm 71 moves from the unlocked position toward the locked position will be described in detail. As shown in FIG. 14, when the swing arm 71 rotates to the “front side position” that forms the first region, the swing arm 71 and the claw portion 23 d overlap when viewed from above. In other words, when the motor 731 that is an electric drive mechanism is electrically applied with torque and moved to the “front side position”, the top-view side end 71g that is a part of the swing arm 71 is separated from the separation direction. It overlaps with the claw part 23d. When the swing arm 71 is rotated to the “front side position”, the end portion 71g on the top view side of the swing arm 71 is positioned on the lock side with respect to the center line of the claw portion. When paying attention to the length in the rotational direction, the outer diameter portion 71f is configured to overlap more than half of the claw portion 23d when viewed from the separation direction at the “front side position”.

  Furthermore, in the first embodiment, when the swing position of the swing arm 71 is “center position” (position on the unlock side with respect to the front position) shown in FIG. Is positioned closer to the lock side than the center line of the claw, in other words, the outermost diameter portion 71f is nail when viewed from the separation direction in the “center position” on the unlock side rather than the “front side position”. It overlaps part 23d by more than half.

  Further, when the swing arm 71 is rotated from the unlock position to the “dead zone start position” that is the unlock side position relative to the “center position”, similarly, the upper end portion 71g of the swing arm 71 is viewed from the top side. Is rotated to a position beyond the center line of the claw portion 23d (see FIG. 14) toward the lock side.

  That is, in the first embodiment, from the viewpoint of improving durability, a first region for applying torque electrically using the motor 731 and a region for applying torque mechanically using the toggle spring 100 are formed. To do. As a result, the entire operating range of the swing arm 71 is not operated by the motor. Therefore, the swing arm 71 avoids an excessive load acting on the motor and the like to improve durability and is attached to a predetermined position by the toggle spring 100. A predetermined position is stably maintained by applying a force.

  Here, if the swing arm 71 and the claw portion 23d are not engaged at all when reaching the region that operates only by the toggle spring 100, that is, when they do not overlap at all when viewed from the separated direction, The achievement of the locked state depends only on the elastic force of the toggle spring 100. However, it is assumed that the swing arm 71 may not be sufficiently operated with a small torque due to contamination (garbage, mud, etc.) or freezing in a cold region. In such a scene, it depends on only the elastic force of the toggle spring 100. There is a possibility that sufficient rotation cannot be obtained, and there is a concern about reliability with respect to the locking operation.

  On the other hand, the swing arm 71 and the claw portion 23d overlap each other in a top view before the first region where the motor 731 can electrically and securely apply torque is completed. Reliability in operation can be ensured, and both improvement in durability and improvement in reliability can be achieved.

  Next, the dead zone is set in a region offset from the center position of the swing arm 71 toward the lock side. In other words, the dead zone is formed at a position that overlaps more in the region existing on the lock side from the neutral position than in the region existing on the unlock side from the neutral position. Here, a specific dead zone offset method will be described. In the description of FIG. 12, for the sake of simplicity, the insertion portion 74b1 and the insertion portion 750 have been described as the spring center position aligned with the swing arm rotation center in the neutral position. By forming offset on the lock side, the dead zone can be offset. In this way, the unlocked state can be more reliably ensured by arranging the dead zone offset on the lock side. In addition, although the example which offset the dead zone to the lock | rock side rather than the center position of the swing arm 71 was shown, it cannot be overemphasized that a dead zone may be provided symmetrically with respect to the center position of the swing arm 71.

  Next, the reason for securing the unlocked state will be described. Basically, when the vehicle is stopped, no vibration or the like is input, and the swing arm 71 is not affected. Therefore, when the vehicle is in a stopped state such as during charging, the locked state is maintained. That is not difficult. On the other hand, since vibration or the like is input during traveling, if resonance frequency vibration of the swing arm 71 is input, the swing arm 71 may move to the locked state even though the swing arm 71 is unlocked. . Then, when the operator stops the vehicle at the charging stand and tries to charge it, the swing arm 71 is in the locked state, so the charging connector 2 cannot be inserted. Since the operator does not particularly operate the lock mechanism, such a situation is uncomfortable. Therefore, even if vibration or the like is input during traveling, the operator can avoid an uncomfortable feeling by ensuring the unlocked state.

  Next, an energization switching mechanism for realizing the application of motor torque shown in FIGS. 13 and 14 to the swing arm 71 will be described. FIG. 15 is a diagram in which the worm wheel 734, the drive gear 734a, and the driven member 735 are removed from the internal structure diagram showing the mechanical configuration of the lock mechanism shown in FIG. The lock mechanism has a donut-shaped switch member 739 on the back side of the worm wheel 734. The switch member 739 has an engaging portion 739a that protrudes from the donut-shaped disk portion toward the driven member 735, and is inserted into the elongated hole 735c. FIG. 16 is a perspective view of the switch member. On the back surface side of the disk portion of the switch member 739, there is an energization terminal 739b having a leaf spring shape and formed with a plurality of legs. The energization terminal 739b has a first contact portion 739b1 and a second contact portion 739b2 that are in sliding contact with an energization portion, which will be described later, and energizes between the energization portions in contact with both.

  On the back side of the switch member 739, a first energizing portion 736a, a second energizing portion 736b, and a third energizing portion 736c, which are bus bars for electrically connecting a power source (not shown) and the motor 731, A first diode 737a that allows only a current flow from the first energization unit 736a to the second energization unit 736b, a second diode 737b that only allows a current flow from the third energization unit 736c to the second energization unit 736b, Have The third energization portion 736c is connected to the terminal 731a of the motor 731. On the other hand, the terminal 731b of the motor 731 is electrically connected to a power source (not shown) via the bus bar 738.

  In the switch member 739, the energization terminal 739b rotates according to the operation of the driven member 735 (swing arm 71), and slides on the first, second and third energization portions. At this time, the switch member 739 (mechanical switch) is arranged such that the first contact portion 739b1 is located at the first energization portion 736a and the second contact portion 739b2 is located at the second energization portion 736b. The first position where the second current-carrying part 736b communicates, the first contact part 739b1 is located at the first current-carrying part 736a, and the second contact part 739b2 is located at the third current-carrying part 736b, thereby The second position where the third current-carrying part 736c communicates, the first contact part 739b1 is located at the second current-carrying part 736a, and the second contact part 739b2 is located at the third current-carrying part 736b. It has a current-carrying terminal 739b set to a length that can achieve three positions of the third position communicating with the third current-carrying part 736c.

  Next, the relationship between the position of the energization terminal 739b and the energization state will be described. FIG. 17 is a schematic diagram illustrating an energized state by the switch member of the first embodiment. The lock mechanism of the first embodiment controls the energization state (energization on / off and energization direction) to the motor 731 based on the energization command from the control unit CU. For example, as shown in FIG. 17A, in the case of energization driving from the unlocked state to the locked state, the first energizing portion 736a is set to plus and the bus bar 738 is set to minus. At this time, in the unlocked state, since the energization terminal 739b is in the first position, the current flows from the first energization portion 736a to the second energization portion 736b via the energization terminal 739b and through the second diode 737b. The motor 731 is driven by flowing to the 3 energization section 736c.

  Next, when the swing arm 71 is rotated by driving the motor 731, the switch member 739 is also rotated together as shown in FIG. 17B, and the energizing terminal 739b is in the second position. This second position corresponds to a state in which the first region and the second region shown in FIGS. 13 and 14 overlap each other, and the motor 731 is configured to be energized in either direction regardless of the diode. Control.

  Next, when the swing arm 71 is further rotated by driving the motor 731, as shown in FIG. 17C, the energization terminal 739b is in the third position. In this case, since the first diode 737a prohibits the energization from the first energization unit 736a to the second energization unit 736b, the energization state cannot be obtained. In this case, the swing arm 71 is rotated by the torque of the toggle spring 100, and the switch member 739 is also rotated accordingly. Thereby, the swing arm 71 completes the movement to the lock position. The timing at which the energization terminal 739b is switched between the second position and the third position is a position corresponding to the “front side” of the first region in FIGS.

  Next, when driving from the locked position to the unlocked position, the energization direction is switched from the state shown in FIG. 17C as shown in FIG. Then, the motor 731 is driven in the opposite direction by flowing from the third energization unit 736c to the second energization unit 736b via the energization terminal 739b and to the first energization unit 736a via the first diode 737a. Since the subsequent operation is basically the same as the operation toward the unlock position, the description thereof is omitted.

  FIG. 18 is a time chart showing the energization drive state for the lock mechanism of the first embodiment. In the lock mechanism of the first embodiment, when the swing arm 71 is driven to be energized, energization and de-energization are intermittently repeated. At this time, the on-time t1 is a time during which the swing arm 71 can reliably move from the unlock position to the lock position, or from the lock position to the unlock position when there is no obstacle or the like within the operating range of the swing arm 71. Time to move is secured. On the other hand, the non-energization time t2 is set to be longer than the time necessary for the swing arm 71 to return to the operation start position by the toggle spring 100. Here, the reason for intermittent energization and the definition of the non-energization time will be described in detail.

  When the swing arm 71 is driven, it is assumed that an obstacle such as ice or mud adheres to the swing arm 71 itself or the claw 23d and cannot be rotated to a lockable position. In this case, the swing arm 71 is made to function like a hammer by energizing intermittently, and the obstacle is shocked a plurality of times to remove the obstacle.

  At this time, as shown in FIG. 14, when the swing arm 71 rotates to the dead zone, the swing arm 71 rotates to a lockable position. In this case, there is no problem because the locked state can be secured. However, the locked state cannot be secured if the obstacle can only turn to the front of the dead zone. At this time, when the energization is completed, the swing arm 71 is returned to the unlock position, which is the operation start position, by the action of the toggle spring 100. Therefore, the swing arm 71 is made to function like a hammer by utilizing the action of the toggle spring 100 and intermittently energizing it.

  When removing or crushing an obstacle by causing the swing arm 71 to function like a hammer, the swing arm 71 should be driven by energization again after the swing arm 71 has surely returned to the unlocked position by the action of the toggle spring 100. As compared with the case where energization is resumed before the motor returns to the unlock position, a larger inertial force can be applied to the swing arm 71. Accordingly, the non-energization time t2 is secured by the toggle spring 100 for the time required for the swing arm 71 to return from the dead zone to the unlock position.

  Next, the action of the actual current in the normal state shown in FIG. 18 will be described based on the schematic diagram of FIG. FIG. 19 is a schematic diagram illustrating the position of the energizing terminal and the operating state of the energizing terminal according to the first embodiment. When the first contact portion 739b1 is in the position P1 corresponding to the unlock position, an ON signal is output for the energization time t1 by an energization command based on the lock request. When there is no obstacle or the like, the swing arm 71 exceeds the dead zone by driving based on the energization command. Therefore, the first contact portion 739b1 moves to the position P3 corresponding to the lock position by the action of the toggle spring 100. Since this position is the third position, energization is mechanically interrupted by the first diode 737a. Therefore, even if an ON command is output intermittently as an energization command, no current flows through the motor 731 and wasteful current consumption is suppressed.

Next, the action of the actual current at the time of abnormality shown in FIG. 18 will be described based on FIG. Here, when there is an obstacle, the swing arm 71 is turned to the front side of the dead band, and then the obstacle is destroyed by the swing arm 71 to enable rotation. Show.
When there is an obstacle, the first contact portion 739b1 can move only to the position P2 before the dead zone. Here, when the energization time t1 elapses, thereafter, the off signal is secured for the non-energization time t2. Then, the swing arm 71 is returned to the unlock position, which is the operation start position, by the action of the toggle spring 100. Next, when the non-energization time t2 elapses, an on signal is output thereafter. As a result, the swing arm 71 can function like a hammer and can be swung over to destroy obstacles. If the obstacle is successfully destroyed by this operation, then the swing arm 71 rotates to the lock position. At this time, since energization is mechanically interrupted by the first diode 737a as described above, no current flows through the motor 731 even if an energization command is output thereafter. In other words, until the obstacle is successfully destroyed, the swing arm 71 can function as a hammer by the number of intermittent energizations, and when the obstacle is successfully destroyed, an ON command is output thereafter. Even so, a configuration in which no current flows can be obtained mechanically. Therefore, on the control unit CU side, it is only necessary to repeat the energization and non-energization commands a predetermined number of times set in advance, so that the control logic can be simplified.

As described above, Example 1 has the following effects.
(1) a charging port 4 having a convex portion 41a (engaged portion) that engages with the engaging portion of the charging connector 2 by a user's operation and to which power from an external power source is supplied in the engaged state; When the claw 23d (engagement portion) and the convex portion 41a are in the engaged state, the swing arm that restricts the release operation of the engaged state by restricting the release operation in which the claw portion 23d is separated from the convex portion 41a. 71 (restricting member), and the swing arm 71 operated by energization driving, overlaps with the claw portion 23d when viewed from the separation direction, restricts the release operation of the claw portion 23d, and the claw portion 23d A locking mechanism 7 (locking state control means) that achieves an unlocking state that allows a releasing operation without wrapping, and the locking mechanism 7 has a predetermined position in which the swing arm 71 is locked or unlocked. Between the swing arm 71 and the vehicle body side from the front side to the predetermined position from the front side to the predetermined position. When the swing arm 71 is energized and driven, the energization and de-energization are intermittently repeated and the non-energization is performed. The energization time was set to be longer than the time necessary for the swing arm 71 to return to the operation start position by the toggle spring 100.
Therefore, since the entire operating range of the swing arm 71 is not operated by the motor, the swing arm 71 can avoid an excessive load from acting on the motor and the like, and can improve durability. Moreover, since it is moved by the toggle spring 100, an urging force can be applied to a predetermined position, and the predetermined position can be stably maintained. Further, when there is an obstacle, when the off signal is secured for the non-energization time t2, the swing arm 71 is returned to the unlocked position, which is the operation start position, by the action of the toggle spring 100. After that, an ON signal is output, so that the swing arm 71 can function like a hammer and can be shaken largely to destroy an obstacle.

(2) The lock mechanism 7 includes a first energization portion 736a, a second energization portion 736b, a third energization portion 736c, and a first energization for electrically connecting to an actuator that operates the restriction member by energization driving. A first diode 737a that allows only current flow from the part 736a to the second energization part 736b, and a second diode 737b that allows only current flow from the third energization part 736c to the second energization part 736b. In conjunction with the rotation of the swing arm 71, a first position where the first energizing portion 736a and the second energizing portion 736b are communicated, a second position where the first energizing portion 736a and the third energizing portion 736c are communicated, A switch member 739 (mechanical switch) that can achieve three positions of the third position that communicates the second energization part 736b and the third energization part 736c is provided.
Therefore, until the obstacle is successfully destroyed, the swing arm 71 can function as a hammer as many times as the number of intermittent energizations. When the obstacle is successfully destroyed, an ON command is output thereafter. However, a configuration in which no current flows can be obtained mechanically. Therefore, on the control unit CU side, it is only necessary to repeat energization and de-energization for a predetermined number of times set in advance, so that unnecessary energization of current can be avoided while simplifying the control logic.

(3) The mechanical drive mechanism is a toggle spring 100 provided between the swing arm 71 and the vehicle body side.
Therefore, the urging force can be applied only to a desired region with a simple configuration, and a stable operation can be realized at a low cost.

(4) As a limiting member, a swing arm 71 that switches between a locked state and an unlocked state by rotation is adopted.
Therefore, it is possible to achieve a sufficiently restricted state while having a simple configuration. In addition, the manufacturing cost can be reduced by diverting the parts used in the existing automatic door lock mechanism and the like as they are.

  Although the present invention has been described based on the embodiments, other configurations may be used. In the first embodiment, an example in which the charging port is provided in front of the vehicle is shown. However, the charging port may be provided in the rear of the vehicle or in the side of the vehicle. Moreover, although the electric vehicle has been described in the embodiment, a plug-in hybrid vehicle or the like may be used.

  In the first embodiment, the configuration using the coil spring as the toggle spring is shown as an example. However, other configurations can be applied without any problem as long as the same effect is exhibited. For example, a method of applying an urging force such as a seesaw type toggle switch may be used. In the embodiment, an example of switching between a state restricted by rotation and a state not restricted as a lock mechanism has been described. However, the lock mechanism is not limited to rotation, and is configured to be switched by a configuration that slides in the front-rear direction and the left-right direction. It doesn't matter. Further, in the embodiment, as shown in FIG. 14, the claw portion center line and the lock position are the same position, but the lock position may be a further rotated position or a slightly forward position.

DESCRIPTION OF SYMBOLS 1 Charging stand 2 Charging connector 4 Charging port 6 Car-mounted battery 7 Lock mechanism 8 Lock mechanism 9 Cover member 23 Engaging member 23a Release button 23c Support point 23d Claw part 71 Swing arm (restriction member)
73 Lock actuator
100 Toggle spring (mechanical drive mechanism)
736a 1st current-carrying part
736b Second energizing section
736c 3rd energizing part
737a First diode
737b Second diode
739 Switch members (mechanical switches)

Claims (4)

A charging port that has an engaged portion that engages with an engaging portion of the charging connector by a user's operation, and that is supplied with power from an external power source in the engaged state;
A restricting member that restricts release of the engaged state by restricting a release operation in which the engaged portion is separated from the engaged portion when the engaged portion and the engaged portion are in the engaged state. When,
By operating the restriction member by energization driving, the locking member overlaps with the engagement member when viewed from the separation direction and restricts the release operation of the engagement portion, and does not overlap with the engagement member. A locked state control means for achieving an unlocked state allowing the release operation to
Have
The lock state control means moves the restricting member to a position closer to the front side than the predetermined position by electrically applying torque when moving the restricting member to a predetermined position in a locked state or an unlocked state. An electric drive mechanism, and a mechanical drive mechanism that moves by mechanically applying torque from the near side position to the predetermined position. A charging port control device for an electric vehicle characterized by intermittently repeating energization and setting the non-energization time to a time required for the limiting member to return to the operation start position by the mechanical drive mechanism. . The charging port control device for an electric vehicle according to claim 1,
The lock state control means includes a first energization unit, a second energization unit, a third energization unit, and the first energization unit for electrically connecting to an actuator that operates the restriction member by energization driving. A first diode that allows only a current flow to the second energization unit, and a second diode that allows only a current flow from the third energization unit to the second energization unit. In conjunction with the movement, a first position where the first energization unit and the second energization unit communicate with each other, a second position where the first energization unit and the third energization unit communicate with each other, and the second energization unit A charging port control device for an electric vehicle, comprising a mechanical switch capable of achieving three positions of a third position that communicates with the third energization section. In the charging port control device for an electric vehicle according to claim 1 or 2,
The charging port control device for an electric vehicle, wherein the mechanical drive mechanism is a toggle spring provided between the restriction member and the vehicle body side. In the charging port control device for an electric vehicle according to any one of claims 1 to 3,
The charging port control device for an electric vehicle, wherein the limiting member is a swing arm that is switched between a locked state and an unlocked state by turning.

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