JP2010095964A - Powered door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a powered door which enables the smooth behavior of a door body during braking. <P>SOLUTION: This powered door for opening/closing a door opening by driving the door body through the use of power of a motor (510) via a power transmission mechanism includes: a regenerating brake circuit (514) for a motor, capable of being turned on/off; a worm speed reducing mechanism (530) which exists in the power transmission mechanism by positioning a worm gear (532) on the side of the motor and positioning a worm wheel (534) on the side of the door body, and which can reversibly transmit the power between the worm gear and the worm wheel (534); a clutch (520) which can be turned on/off and which connects a revolving shaft (512) of the motor and the worm gear (532) of the worm speed reducing mechanism together; and a control means for time-series controlling a combination of the on/off state of the regenerating brake circuit (514) and that of the clutch (520) when the door body is braked. <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.

  The motor is provided with a regenerative brake circuit that can be turned on and off, and braking and non-braking of the motor are performed by turning on and off the regenerative brake circuit, respectively. A clutch is provided in the power transmission mechanism, and the clutch is turned on when the door body is driven and is turned off when the door is not driven. When the clutch is turned off, the door body becomes free and can be opened and closed manually.

  Depending on the combination of ON / OFF of the regenerative brake circuit and ON / OFF of the clutch, the door body is in a state of either strong braking, weak braking, or free braking. That is, the combination of turning on the regenerative brake circuit and turning on the clutch puts the door body in a strong brake state, and the combination of turning off the regenerative brake circuit and turning on the clutch puts the door body in a weak brake state and turns off the regenerative brake circuit. The door body is in a free state by the combination of clutch off.

  Since the door body in the free state may start to move under its own weight when the vehicle is tilted back and forth, any one of the strong brake, the weak brake and the free state maintenance is performed according to the moving speed of the door body. When the moving speed is excessive, strong braking is performed, when the moving speed is within a predetermined range, weak braking is performed, and otherwise, the free state is maintained (see, for example, Patent Document 1).

  When a worm reduction mechanism is provided in the power transmission mechanism, a clutch is provided on the output side (worm wheel side) of the worm reduction mechanism, and the door body is weakly braked by turning the clutch on and off (for example, Patent Document 2). reference).

When the clutch is provided on the input side (worm gear side) of the worm reduction mechanism, the worm reduction mechanism can transmit power reversibly between the worm gear and the worm wheel so that the door body can be manually opened and closed when the clutch is off. It has a structure (see, for example, Patent Document 3).
Japanese Patent No. 3521835 (paragraph numbers 0013-0016, 0019-0021, FIGS. 1, 2, 4) Japanese Patent No. 3848289 (paragraph numbers 0038, 0045-0048, FIG. 4-5) Japanese Patent No. 4058332 (paragraph numbers 0013-0015, 0021, FIG. 2-5)

  The door body in the free state can be closed (or opened) with human power. In such a case, if a strong brake is performed as described in Patent Document 1, a hand may be shocked by a sudden stop of the door body. In order to avoid this, it is sufficient to start with a weak brake and then shift to a strong brake. However, in the technique described in Patent Document 1, a strong brake is applied from the beginning. Impossible.

  Further, as described in Patent Document 2, when the clutch is turned on and off in small increments to perform weak braking, the behavior of the door body becomes jerky and abnormal noise is easily generated. Furthermore, the clutch is required to be strong enough to withstand frequent on / off.

  Therefore, an object of the present invention is to realize a power door in which the behavior of the door body during braking is smooth.

  The invention according to claim 1 as means for solving the problem is a power door that opens and closes the door opening by driving the door body with the power of the motor via a power transmission mechanism, and can be turned on and off for the motor. A regenerative brake circuit, a speed reducing mechanism that is present in the power transmission mechanism and capable of reversible power transmission, a clutch that is present in the power transmission mechanism and that can be turned on / off, and the regenerative brake when braking the door body A power door comprising a control means for controlling a combination of an on / off state of a circuit and an on / off state of the clutch in time series.

  The invention according to claim 2 as means for solving the problem is that the control means first combines a combination of the on / off state of the regenerative brake circuit and the on / off state of the clutch. 2. The power door according to claim 1, wherein the power door is a combination of an ON state of the clutch, and then a combination of an ON state of the regenerative brake circuit and an ON state of the clutch.

  The invention according to claim 3 as a means for solving the problem, in the control means, the combination of the on / off state of the regenerative brake circuit and the on / off state of the clutch, first, the off state of the regenerative brake circuit and the A combination of the clutch on state, then a combination of the regenerative brake circuit on state and the clutch on state, and then a combination of the regenerative brake circuit off state and the clutch on state, The power door according to claim 1, wherein the regenerative brake circuit is in an off state or an on state and a combination of the clutch in an off state.

  In the invention according to claim 4 as means for solving the problem, the speed reduction mechanism has a worm gear on the motor side and a worm wheel on the door body side, and reversibly transmits power between the worm gear and the worm wheel. 4. The power door according to claim 3, wherein the clutch is configured such that a rotary shaft of the motor and a worm gear of the worm reduction mechanism are coupled to be turned on and off.

  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 via the power transmission mechanism includes a regenerative brake circuit that can be turned on and off for the motor, and the power transmission. A speed reducing mechanism that is present in the mechanism and capable of reversibly transmitting power; a clutch that is present in the power transmitting mechanism and that can be turned on / off; and an on / off state of the regenerative brake circuit and an on / off state of the clutch when the door body is braked Since the control means for controlling the combination of states in time series is provided, it is possible to realize a power door in which the behavior of the door body during braking is smooth.

  According to the second aspect of the present invention, the control means first sets a combination of the on / off state of the regenerative brake circuit and the on / off state of the clutch as a combination of the off state of the regenerative brake circuit and the on state of the clutch. Next, since the combination of the ON state of the regenerative brake circuit and the ON state of the clutch is used, the state of the door body can be shifted in stages from the weak brake state to the strong brake.

  According to a third aspect of the present invention, the control means sets the combination of the on / off state of the regenerative brake circuit and the on / off state of the clutch as a combination of the off state of the regenerative brake circuit and the on state of the clutch. Next, a combination of the on state of the regenerative brake circuit and the on state of the clutch, and then a combination of the off state of the regenerative brake circuit and the on state of the clutch, and then the off state of the regenerative brake circuit. As a combination of the state or on state and the clutch off state, the door body state is gradually shifted from the weak brake state to the strong brake state, and from that state to the free state step by step. Can be migrated to.

  According to a fourth aspect of the present invention, the speed reduction mechanism is a worm speed reduction mechanism capable of reversibly transmitting power between the worm gear and the worm wheel with the worm gear on the motor side and the worm wheel on the door body side. Therefore, the speed reduction mechanism can be made compact, and the clutch connects the rotating shaft of the motor and the worm gear of the worm speed reduction mechanism so as to be able to be turned on and off, so that power transmission is turned on and off at the input side of the speed reduction mechanism. The clutch can be reduced in size.

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 an opening and closing mechanism that uses the power of the motor. The opening / closing mechanism will be described later.

  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. The slide door 200 is an example of a door body in the present invention. The door opening 300 is an example of a door opening in the present invention.

  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 includes an ECU (Electronic Control Unit) 10. The ECU 10 is the center of the sliding door control system 1.

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

  An input signal from the main SW 30 is a signal that indicates ON / OFF of the main SW 30. The main SW 30 is turned on and off by the passenger. The ECU 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 ECU 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 ECU 10 recognizes the movement amount of the slide door 200 based on the input signal from the door movement amount detection circuit 50. The ECU 10 obtains the current position of the slide door 200 from the integrated value of the door movement amount. ECU10 calculates | requires the moving speed (door moving speed) of the sliding door 200 from the change rate of door movement 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 sliding door 200 is opened / closed by the power of the motor according to the corresponding control command of the ECU 10. . That is, the sliding door is opened and closed in the power mode. In the power mode, the ECU 10 adjusts the door moving speed based on the target speed.

  FIG. 4 schematically shows an example of a main part of the opening / closing mechanism 500. As shown in FIG. 4, the opening / closing mechanism 500 includes a motor 510, a clutch 520, and a worm reduction mechanism 530. The motor 510 has a rotating shaft 512. The worm reduction mechanism 530 includes a worm gear 532 and a worm wheel 534. The worm gear 532 is an input shaft of the worm reduction mechanism 530, and the central shaft 534 c of the worm wheel 534 is an output shaft of the worm reduction mechanism 530.

  The motor 510 is an example of a motor in the present invention. As the motor 510, for example, a DC motor that can rotate in both forward and reverse directions is used. Motor 510 has a regenerative braking circuit that is turned on and off by relay 514. The regenerative braking circuit is activated (on) and deactivated (off) in response to the relay 514 being turned on and off, respectively. Hereinafter, the regenerative brake circuit is represented by the relay 514, and on / off of the relay 514 is also referred to as on / off of the regenerative brake circuit 514. The regenerative brake circuit 514 is an example of a regenerative brake circuit in the present invention.

  When the regenerative brake circuit 514 is on, a strong braking force is applied to the rotating shaft 512 of the motor 510. When the regenerative brake circuit 514 is off, a weak braking force acts on the rotating shaft 512 of the motor 510. The weak braking force is derived from the rotational resistance (cogging torque) of the rotor of the motor 510. Hereinafter, the braking force acting on the rotating shaft 512 of the motor 510 is simply referred to as braking force acting on the motor 510.

  The clutch 520 is an example of a clutch in the present invention. For example, an electromagnetic clutch or the like is used as the clutch 520. Clutch 520 coaxially couples worm gear 532 of worm reduction mechanism 530 to rotating shaft 512 of motor 510.

  As the clutch, a clutch that turns on / off power transmission on the output side of the worm reduction mechanism may be used. Hereinafter, an example of a clutch that turns on / off power transmission on the input side of the worm speed reduction mechanism will be described, but the same applies to the case where power transmission is turned on / off on the output side of the worm speed reduction mechanism.

  The worm speed reduction mechanism 530 is an example of a speed reduction mechanism in the present invention, and is also an example of a worm speed reduction mechanism. The worm speed reduction mechanism 530 constitutes a part of the power transmission mechanism in the present invention. As the worm reduction mechanism 530, a mechanism capable of reversibly transmitting power between the worm gear 532 and the worm wheel 534 is used.

  In such a worm reduction mechanism, the advance angle of the worm gear 532 is set in a range of 15 degrees to 35 degrees. Thus, both power transmission with the worm gear 532 as the main drive side and the worm wheel 534 as the driven side and power transmission with the worm wheel 534 as the main drive side and the worm gear 532 as the driven side are possible.

  As the speed reduction mechanism, an appropriate speed reduction mechanism capable of reversibly transmitting power may be used instead of the worm speed reduction mechanism. Hereinafter, an example of a worm speed reduction mechanism will be described, but the same applies to other types of speed reduction mechanisms.

  The worm gear 532 has a permanent magnet 532 m at the end opposite to the clutch 520. A Hall IC 532h is provided in the vicinity of the permanent magnet 532m. The permanent magnet 532m and the Hall IC 532h constitute a pulse generator for the door moving speed detection circuit 50.

  The rotation of the rotation shaft 512 of the motor 510 is controlled by the ECU 10. Hereinafter, the rotation of the rotating shaft 512 of the motor 510 is simply referred to as the rotation of the motor 510. On / off of relay 514 and on / off of clutch 520 are also controlled by ECU 10.

  The ECU 10 releases the drive of the slide door 200 when the slide door 200 reaches a position immediately before full opening or a position immediately before full closing, or when the main SW 30 is turned off during operation in the power mode.

  When the drive is released, the motor 510 is not energized, and the relay 514 and the clutch 520 are turned off. When the relay 514 is turned off, the regenerative brake circuit 514 is turned off, and the motor 510 enters a weak braking state. Further, when the clutch 520 is turned off, the worm reduction mechanism 530 is in a state where the worm gear 532 can rotate without resistance. At this time, the slide door 200 is in a free state.

  In the drive release state, the slide door 200 may still move due to inertia or the like, may start to move due to the inclination of the vehicle body, or may be opened and closed manually. In such a case, the ECU 10 controls the slide door 200 as follows. The ECU 10 is an example of a control unit in the present invention.

  FIG. 5 shows a flowchart of the sliding door control. As shown in FIG. 5, when the drive is released in step S1, it is determined in step S2 whether or not a brake operation condition is satisfied. The brake operation condition is defined, for example, that the door moving speed is equal to or higher than a predetermined speed.

When the determination is NO, looping is performed at step S2. When the determination is YES, the clutch is turned on at step S3. As a result, the clutch 520 is turned on, and the rotating shaft 512 of the motor 510 and the worm gear 532 of the worm reduction mechanism 530 are coupled.
At this time, since the relay 514 is turned off when the drive is released, the combination of the on / off state of the regenerative brake circuit 514 and the on / off state of the clutch 520 is a combination of the regenerative brake circuit 514 off and the clutch 520 on.

  When the regenerative brake circuit 514 is turned off, the motor 510 is in a weak braking state, and such a motor 510 is coupled to the worm reduction mechanism 530 when the clutch 520 is turned on, so that a weak braking force acts on the slide door 200. To do.

  In this way, when the brake operation condition is established, first, a weak brake is applied to the slide door 200. Therefore, a strong braking force is not applied all at once as when the regenerative brake is operated from the beginning. In addition, since the weak brake is based on the rotational resistance of the motor 510, there is no jerky behavior or abnormal noise as when the clutch is turned on and off in small increments.

  Thereafter, the relay is turned on in step S4. As a result, the relay 514 is turned on, and the regenerative brake circuit 514 is closed. At this time, since the clutch 520 is already on, the combination of the on / off state of the regenerative brake circuit 514 and the on / off state of the clutch 520 is a combination of the regenerative brake circuit 514 on and the clutch 520 on.

  When the regenerative brake circuit 514 is turned on, the motor 510 is forcedly operated, and a strong braking force acts on the worm speed reduction mechanism 530 through the clutch 520. As a result, a strong braking force acts on the slide door 200.

  In this way, the strong brake works on the sliding door 200 following the weak brake. For this reason, since the braking force acts on the slide door 200 stepwise from the weak brake to the strong brake, the behavior during braking becomes smooth.

  In addition, even when the sliding door 200 in the free state is closed (or opened) with human power, a weak braking force is initially applied, so that a situation where the hand is shocked does not occur.

  In step S5, it is determined whether or not a brake release condition is satisfied. The brake release condition is defined as, for example, that the door moving speed is a predetermined speed or less. The predetermined speed for releasing the brake is, for example, a speed lower than the predetermined speed for operating the brake.

  When the determination is NO, looping is performed at step S5. When the determination is YES, the relay is turned off at step S6. As a result, the relay 514 is turned off, and the regenerative brake circuit 514 is opened.

  At this time, since the clutch 520 remains on, the combination of the on / off state of the regenerative brake circuit 514 and the on / off state of the clutch 520 is a combination of the regenerative brake circuit 514 turned off and the clutch 520 turned on. The brake is weak.

  Thereafter, in step S7, it is determined whether or not a clutch-off condition is satisfied. As the clutch-off condition, for example, it is defined that a predetermined second has elapsed since the sliding door 200 stopped, that the sliding door 200 has reached the fully open position, or the fully closed position.

  When the determination is NO, looping is performed at step S7. When the determination is YES, the clutch is turned off at step S8. At this time, since the relay 514 is already off, the combination of the on / off state of the regenerative brake circuit 514 and the on / off state of the clutch 520 is a combination of the regenerative brake circuit 514 off and the clutch 520 off. The door 200 is in a free state. When the clutch 520 is turned off, the slide door 200 enters a free state regardless of whether the regenerative brake circuit 514 is turned on or off.

  Thus, when the brake release condition is satisfied, the clutch 520 is not turned off at once, and the clutch is turned off through the weak brake state, so that the distortion accumulated in the power transmission mechanism during the strong brake operation is gradually released. , No shaking or abnormal noise of related parts occur.

  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 typically the principal part of an opening-and-closing mechanism. It is a flowchart which shows operation | movement of a sliding door control system.

Explanation of symbols

1: Sliding door control system 10: ECU
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: Opening / closing mechanism 510: Motor 512: Rotating shaft 514: Relay 520: Clutch 530: Worm reduction mechanism 532: Worm gear 532m: Permanent magnet 532h: Hall IC
534: Worm wheel 534c: Output shaft

Claims (4)

A power door that opens and closes the door opening by driving the door body with the power of the motor via a power transmission mechanism,
An on / off regenerative brake circuit for the motor;
A deceleration mechanism that is present in the power transmission mechanism and capable of reversibly transmitting power;
A clutch that is present in the power transmission mechanism and can be turned on and off;
A power door comprising: control means for controlling a combination of an on / off state of the regenerative brake circuit and an on / off state of the clutch in time series when the door body is braked. The control means includes
A combination of an on / off state of the regenerative brake circuit and an on / off state of the clutch,
First, a combination of an off state of the regenerative brake circuit and an on state of the clutch,
The power door according to claim 1, wherein the power door is a combination of an on state of the regenerative brake circuit and an on state of the clutch. The control means includes
A combination of an on / off state of the regenerative brake circuit and an on / off state of the clutch,
First, a combination of an off state of the regenerative brake circuit and an on state of the clutch,
Next, a combination of the on state of the regenerative brake circuit and the on state of the clutch,
Next, a combination of an off state of the regenerative brake circuit and an on state of the clutch,
The power door according to claim 1, wherein the regenerative brake circuit is in an off state or an on state and a combination of the clutch in an off state. The deceleration mechanism is
The worm gear is a worm reduction mechanism capable of reversibly transmitting power between the worm gear and the worm wheel, with the worm gear on the motor side and the worm wheel on the door body side.
The clutch is
4. The power door according to claim 3, wherein the rotary shaft of the motor and the worm gear of the worm reduction mechanism are coupled so as to be turned on and off.

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