JP2010077758A - Power door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power door wherein the behavior of a door body is smooth in operation of a regeneration brake. <P>SOLUTION: The power door configured to drive the door body by power of a motor to thereby open and close a door opening and also to operate the regeneration brake when the moving speed of the door body is excessive includes a switching means (600) which switches the strength of braking force of the regeneration brake. The switching means increases the braking force when the door body is close to a full-close position and/or close to a full-open position of the door opening, and decreases the braking force in other positions. The switching of the braking force is performed by switching the internal resistance of a regeneration brake circuit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power door, and more particularly to a power door that opens and closes a door opening by driving a door body with the power of a motor.

  In one-box and minivan vehicles, the rear side door is often a power slide door that is opened and closed by the power of a motor. In the power slide door, the door body is pulled out of the door opening and opened by the power of the motor, and is inserted into the door opening and closed.

In the case of a power slide door, for example, when the vehicle body is tilted back and forth, such as when stopping on a slope, the opening and closing speed may be excessive due to acceleration due to the weight of the door body. In such a case, a regenerative brake provided in the motor is operated to prevent an abnormal speed increase of the door body (see, for example, Patent Document 1).
JP 2006-274541 A (paragraph numbers 0020-0025, 0057-0058, FIG. 3-5)

  The regenerative brake is released when the speed of the door body is lower than the target speed, and when the increased speed exceeds the target speed, the regenerative brake is operated again, so that the operation of the regenerative brake is intermittent. For this reason, the opening and closing speed pulsates, and the behavior of the door body becomes jerky.

  Accordingly, an object of the present invention is to realize a power door in which the door body behaves smoothly when the regenerative brake is operated.

  The invention according to claim 1 as means for solving the problem is a power for driving the door body by the power of the motor to open and close the door opening, and for operating the regenerative brake when the moving speed of the door body is excessive. The door is a power door comprising switching means for switching the strength of the braking force of the regenerative brake.

  The invention according to claim 2 as means for solving the problem is that the switching means increases the braking force when the door body is near the fully open position and / or near the fully open position of the door opening, The power door according to claim 1, wherein braking force is weakened at other positions.

  The invention according to claim 3 as means for solving the problem is characterized in that the switching of the braking force is performed by switching the internal resistance of the regenerative brake circuit. It is a power door.

  The invention according to claim 4 as means for solving the problem is the power door according to claim 3, wherein the switching of the internal resistance is performed by a relay.

  According to the first aspect of the present invention, the power door that opens and closes the door opening by driving the door body with the power of the motor and that activates the regenerative brake when the movement speed of the door body is excessive is the power door of the regenerative brake. Since the switching means for switching the strength of the braking force is provided, it is possible to realize a power door in which the behavior of the door body when the regenerative brake is operated is smooth.

  According to the invention of claim 2, the switching means increases the braking force when the door body is near the fully closed position and / or near the fully open position of the door opening, and at other positions the braking force. Is weakened, so both smoothness and safety of behavior can be achieved. Further, since the gentle braking toward the target speed is possible by the weak braking, the frequency of operation of various relays is reduced and the wear of the operating portion is reduced as compared with the case of the forced operation.

According to the invention of claim 3, since the switching of the braking force is performed by switching the internal resistance of the regenerative braking circuit, the switching of the braking force can be performed appropriately.
According to the invention of claim 4, since the switching of the internal resistance is performed by a relay, the switching of the internal resistance can be performed appropriately.

The best mode for carrying out the invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the best mode for carrying out the invention.
FIG. 1 schematically shows the appearance of the left side of a vehicle equipped with a power sliding door. As shown in FIG. 1, the vehicle 100 is equipped with a power slide door 200. The power slide door 200 is an example of the best mode for carrying out the invention. The configuration of the power slide door 200 shows an example of the best mode for carrying out the invention relating to the power door. Hereinafter, the power slide door is also simply referred to as a slide door.

  The upper portion, the lower portion, and the rear portion of the slide door 200 engage with guide rails 112, 114, and 116 provided on the upper portion, the lower portion, and the rear portion of the body 110 of the vehicle 100, respectively. The sliding door 200 opens and closes the door opening on the side surface of the body 110 by a reciprocating sliding motion to the rear along the guide rails 112, 114, and 116. The sliding door 200 is opened and closed by a known opening / closing mechanism using the power of the motor.

  FIG. 2 schematically shows the configuration of the sliding door and the door opening. FIG. 2 corresponds to an AA cross-sectional view of vehicle 100 shown in FIG. In FIG. 2, the top is the outdoor, the bottom is the indoor, the left is the front, and the right is the back.

  As shown in FIG. 2, the slide door 200 is closed in a state where the slide door 200 is fitted in the door opening 300 of the body 110. In this state, the outer surface of the slide door 200 has no step with respect to the outer surface of the body 110 and is so-called flush. Further, the door trim 202 on the inner surface of the slide door 200 is also flush with the inner surface of the body 110. Hereinafter, the door opening is also simply referred to as opening.

  The rear portion of the sliding door 200 is engaged with the guide rail 116 via the engaging member 204 in the opening 300. The engaging member 204 has a hinge on the slide door 200 side and a roller on the guide rail 116 side. The guide rail 116 obliquely enters the opening 300 from the outer surface of the body 110, and the roller of the engaging member 204 is positioned near the end of the oblique portion of the guide rail 116.

  The front portion of the sliding door 200 is engaged with the socket 118 by the boss 206 in the opening 300. The socket 118 is provided on the rear surface of the center pillar 120 of the body 110 in the opening 300. On the inner periphery of the opening 300, an opening flange 302 is provided on the indoor side. A weather strip 400 is provided at the front end of the opening flange 302.

  FIG. 3 is a block diagram showing the configuration of the sliding door control system 1. As shown in FIG. 3, the slide door control system 1 has a microcomputer 10. The microcomputer 10 forms the center of the sliding door control system 1.

  The microcomputer 10 receives signals from a main switch (switch) 30, an operation switch (switch) 40, and a door movement amount detection circuit 50. The microcomputer 10 controls the slide door 200 through the door opening / closing control circuit 60 by a predetermined program based on these input signals.

  An input signal from the main SW 30 is a signal representing ON / OFF of the main SW 30. The main SW 30 is turned on / off by the passenger. The microcomputer 10 recognizes the input state of the main SW 30 based on the input signal from the main SW 30.

  The input signal from the operation SW 40 is a signal representing the operation state of the operation SW 40. The operation SW 40 is operated in the opening direction or the closing direction of the slide door 200 by the passenger. The microcomputer 10 recognizes the operation state of the operation SW 40 based on the input signal from the operation SW 40.

  An input signal from the door movement amount detection circuit 50 is a signal (door movement amount signal) indicating the movement amount of the slide door 200. The door movement amount signal is obtained, for example, as a count value of pulses generated with the rotation of the power motor. The pulse generator is composed of a combination of a permanent magnet and a Hall IC, for example.

  The microcomputer 10 recognizes the movement amount of the slide door 200 based on the input signal from the door movement amount detection circuit 50. The microcomputer 10 obtains the current position of the slide door 200 from the integrated value of the door movement amount. The microcomputer 10 also obtains the moving speed (door moving speed) of the slide door 200 from the change rate of the door moving amount.

  In the state where the main SW 30 is turned on, when the operation SW 40 is operated in the opening direction or the closing direction by the passenger, the control command of the microcomputer 10 corresponding thereto and the operation of the door opening / closing control circuit 60 based on the control command are performed. The sliding door 200 is opened and closed by the power of the motor. That is, the sliding door is opened and closed in the power mode. In the power mode, the microcomputer 10 adjusts the opening / closing speed of the slide door 200 based on the target speed.

  When the main SW 30 is turned off during operation in the power mode, the microcomputer 10 stops driving the slide door 200. By stopping the driving, the sliding door 200 enters a free state. The sliding door 200 in the free state can be opened and closed by human power.

  FIG. 4 shows a motor 500 serving as a power source for the sliding door 200, its drive circuit 600 and a battery 700 for power supply. As shown in FIG. 4, the electric power of the battery 700 is supplied to the motor 500 through the drive circuit 600. The drive circuit 600 corresponds to the main part of the door opening / closing control circuit 60. The battery 700 is, for example, a main battery of a vehicle.

  The motor 500 is a DC motor that can rotate in both forward and reverse directions. The motor 500 has a pair of input terminals A and B, and is rotated by a current flowing from the input terminal A to the input terminal B. For example, the motor 500 rotates in the positive direction and flows from the input terminal B to the input terminal A. For example, it rotates in the reverse direction.

  Hereinafter, the current that enters from the input terminal A and exits from the input terminal B is referred to as a forward current, and the current that enters from the input terminal B and exits from the input terminal A is referred to as a backward current. In addition, the forward / reverse of the current direction is a relative name, and when one of them is set as the forward, the other is reversed.

  For example, the slide door 200 is opened by forward rotation of the motor 500 and closed by reverse rotation. On the contrary, the slide door 200 may be opened by reverse rotation of the motor 500 and closed by forward rotation. In any case, the forward / reverse direction of rotation is also a relative name.

  The drive circuit 600 includes relays 601, 602, 603, and 604, a resistor 605, a switching element 606, and diodes 607 and 608. As the switching element 606, for example, an FET (Field Effect Transistor) is used.

  Relays 601, 602, 603, and 604 are all relays having two switching contacts. Of the two switching contacts, the ON contact is closed when the excitation circuit is energized, and is normally open, and the OFF contact is normally closed, when the excitation circuit is energized. It is a normally closed contact that opens. Hereinafter, closing the ON contact is referred to as relay ON, and closing the OFF contact is referred to as relay OFF. On / off of the relays 601 602 603 604 is controlled by the microcomputer 10. The excitation circuit of each relay is not shown.

  Depending on the combination of ON / OFF of the relays 601, 602, 603, and 604, the drive circuit 600 has (1) a circuit configuration for supplying a forward current to the motor 500, and (2) a circuit configuration for supplying a reverse current to the motor 500. (3) Circuit configuration for short-circuiting between the input terminals A and B of the motor 500, (4) Circuit configuration for connecting the input terminals A and B of the motor 500 with a predetermined resistance, and (5) Input of the motor 500 The circuit is switched to one of the circuit configurations in which the terminals A and B are opened.

  In FIG. 4, the drive circuit 600 has a circuit configuration for supplying a forward current to the motor 500. That is, from the + B terminal of the battery 700, the ON contact of the relay 601, the input terminal A of the motor 500, the motor 500, the input terminal B of the motor 500, the ON contact of the relay 603, the OFF contact of the relay 602, and the switching element 606 Then, a current path reaching the GND terminal of the battery 700 is formed, and a forward current is supplied from the battery 700 to the motor 500. The forward current is PWM (pulse width modulated) by the switching element 606. The duty ratio of PWM is controlled by the microcomputer 10. The same applies hereinafter.

  The diode 607 is connected in series with reverse polarity between the + B terminal of the battery 700 and the drain of the switching element 606, and the diode 608 is connected in parallel with reverse polarity between the drain and source of the switching element 606 to protect the diode 607. The circuit is configured. The same applies hereinafter.

  In FIG. 5, the drive circuit 600 has a circuit configuration for supplying a reverse current to the motor 500. That is, from the + B terminal of the battery 700, the ON contact of the relay 602, the ON contact of the relay 603, the input terminal B of the motor 500, the motor 500, the input terminal A of the motor 500, the OFF contact of the relay 601, and the switching element 606 Then, a current path reaching the GND terminal of the battery 700 is formed, and a reverse current is supplied from the battery 700 to the motor 500. The reverse current is PWMed by the switching element 606.

  In FIG. 6, the drive circuit 600 has a circuit configuration that short-circuits between the input terminals A and B of the motor 500. That is, a current path is formed from the input terminal B of the motor 500 to the input terminal A of the motor 500 through the ON contact of the relay 603, the OFF contact of the relay 602, and the OFF contact of the relay 601. The terminals A and B are short-circuited by such a current path. Since the internal resistance of the short circuit is a low resistance consisting of the conductor resistance and the contact resistances of the relays 601, 602, and 603, a large regenerative current flows when the motor 500 rotates, whereby the motor 500 has a strong braking force.

  The current path from the input terminal B of the motor 500 to the input terminal A of the motor 500 through the ON contact of the relay 603, the OFF contact of the relay 602, and the OFF contact of the relay 601 is an example of a regenerative brake circuit in the present invention. It is.

  In FIG. 7, the drive circuit 600 has a circuit configuration in which the input terminals A and B of the motor 500 are connected with a predetermined resistance. That is, a current path is formed from the input terminal B of the motor 500 to the input terminal A of the motor 500 through the OFF contact of the relay 603, the OFF contact of the relay 604, the resistor 605, and the OFF contact of the relay 601. The input terminals A and B are connected by a resistor 605.

  This forms a closed circuit having a resistor 605 in series. Since the closed circuit has the resistor 605, the regenerative current when the motor 500 rotates is smaller than the regenerative current flowing in the short circuit. For this reason, a weaker braking force is applied to the motor 500 than in the case of a short circuit.

Here, if a plurality of switchable resistors are used as the resistor 605, a plurality of steps can be provided for a weak braking force.
The current path from the input terminal B of the motor 500 through the OFF contact of the relay 603, the OFF contact of the relay 604, the resistor 605, and the OFF contact of the relay 601 to the input terminal A of the motor 500 is a regenerative brake circuit in the present invention. It is an example.

  In FIG. 8, the drive circuit 600 has a circuit configuration that opens the input terminals A and B of the motor 500. That is, the input terminal B of the motor 500 is opened via the OFF contact of the relay 603 and the ON contact of the relay 604, and the input terminal A of the motor 500 is opened by the OFF contact of the relay 601, the OFF contact of the relay 602, and the ON of the relay 603. Opened via contact.

  Since the input terminals A and B are opened, neither the drive current nor the regenerative current flows, and the motor 500 enters a free state. When the motor 500 is in a free state, the slide door 200 can be opened and closed manually.

  When the sliding door 200 is opened in the power mode while the vehicle is inclined downward, or when the sliding door 200 is closed in the power mode while the vehicle is inclined downward Due to the acceleration of the door 200 due to its own weight, the door moving speed may become excessive. Moreover, the sliding door 200 that is half open and free may start to move under its own weight when the vehicle body is tilted back and forth. For such a sliding door 200, the microcomputer 10 performs control as described below.

  FIG. 9 shows a flowchart of the control operation. As shown in FIG. 9, in step S1, the current speed is acquired. Thereby, the current value of the door moving speed is obtained. In step S2, a target speed is acquired. Thereby, the target value of the door moving speed is obtained.

  In step S3, it is determined whether or not the current speed exceeds A times the target speed. The multiple A is an appropriate numerical value of 1 or more. When the determination is NO, that is, when it is determined that the current speed does not exceed A times the target speed, it is determined in step S4 whether or not the current speed is below the target speed, and the determination is YES. In step S5, speed control by PWM is performed. If NO, the process ends without doing anything.

  When the determination in step S3 is YES, that is, when it is determined that the current speed exceeds A times the target speed, it is determined in step S6 whether or not the door position is near the close position. The close vicinity means the vicinity of the fully closed position of the slide door 200.

  In step S6, it may be determined whether or not the door position is near the open position. The vicinity of the opening is the vicinity of the fully open position of the slide door 200. Hereinafter, an example in which it is determined whether or not it is close to the closing position will be described.

  If the determination is NO, that is, if the door position is not near the closing position, weak brake control is performed in step S7. The weak brake control is to connect the input terminals A and B of the motor 500 with a resistor 605 as shown in FIG. As a result, a weak braking force acts on the motor 500.

  When the weak braking force acts on the motor 500, the door moving speed gradually decreases and approaches the target speed, so that the release and operation of the regenerative brake are not frequently repeated as in the prior art. For this reason, the pulsation of the door moving speed is eliminated, and the behavior of the sliding door 200 becomes smooth. Further, the frequency of ON / OFF of the relays 601, 602, 603, and 604 is reduced, and their wear is reduced, enabling long-term use.

  If the determination in step S6 is YES, that is, if the door position is near the close position, strong brake control is performed in step S8. The strong brake control is to short-circuit the input terminals A and B of the motor 500 as shown in FIG. As a result, a strong braking force acts on the motor 500.

  By applying a strong braking force, it is possible to rapidly decelerate the sliding door 200 just before closing and prevent dangers such as a human body being caught. However, the door moving speed may pulsate due to sudden braking, but is limited to just before closing, and is acceptable as a trade-off with safety. The microcomputer 10 and the drive circuit 600 related to the operations of steps S3, S6, S7, and S8 are an example of switching means in the present invention.

  As mentioned above, the power door for the vehicle has been exemplified as the best mode for carrying out the invention. However, the power door of the present invention is not limited to the vehicle, but is used for power doors for ships, aircrafts, etc., or indoors and outdoors. It may be a power door for an appropriate use such as a power door to be used. The power door is not limited to a slide type power door, and may be a front door or a back door that opens and closes by a swing, or a power door of a luggage trunk.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view of a vehicle equipped with a power slide door as an example of the best mode for carrying out the invention. It is a figure which shows the structure of a slide door and a door opening. It is a block diagram which shows the structure of a slide door control system. It is a figure which shows the principal part of a door opening / closing control circuit. It is a figure which shows the principal part of a door opening / closing control circuit. It is a figure which shows the principal part of a door opening / closing control circuit. It is a figure which shows the principal part of a door opening / closing control circuit. It is a figure which shows the principal part of a door opening / closing control circuit. It is a flowchart which shows operation | movement of a sliding door control system.

Explanation of symbols

1: Slide door control system 10: Microcomputer 30: Main SW
40: Operation SW
50: Door movement amount detection circuit 60: Door opening / closing control circuit 100: Vehicle 110: Body 112, 114, 116: Guide rail 118: Socket 120: Center pillar 200: Power slide door 202: Door trim 204: Engaging member 206: Boss 300: Door opening 302: Opening flange 400: Weather strip 500: Motor 600: Drive circuit 601, 602, 603, 604: Relay 605: Resistance 606: Switching element 607,608: Diode 700: Battery

Claims (4)

A power door that opens and closes the door opening by driving the door body with the power of the motor, and activates the regenerative brake when the movement speed of the door body is excessive,
A power door comprising switching means for switching the strength of the braking force of the regenerative brake. The switching means increases the braking force when the door body is near the fully closed position and / or near the fully open position of the door opening, and weakens the braking force at other positions. The power door according to 1. The power door according to claim 1 or 2, wherein switching of the braking force is performed by switching an internal resistance of the regenerative brake circuit. The power door according to claim 3, wherein the switching of the internal resistance is performed by a relay.

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