JP2013117506A - Door opening/closing control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that an exclusive space is required for the attachment of an encoder in the case of independently attaching the encoder, and the encoder ends up with an exclusive encoder and the versatility of the encoder device is not achievable in the case of (integrally) including the encoder in a clutch and a bearing.SOLUTION: There is provided an encoder device for easily mounting a magnet to the outer periphery of a clutch driving wheel. The outer periphery of the crutch driving wheel is used, and a flexible magnet having the mutual polarities of N pole and S pole is arranged so as to be annularly rounded by a predetermined pitch at the portion so that an encoder can be attached without changing any existing clutch. Also, the flexible magnet is used so that the encoder can be attached regardless of the outer diameter of the clutch, and a magnetic detection device part is commonly used so that inexpensive and wide application can be achieved.

Description

  The present invention relates to an automotive door opening / closing control device.

  In recent automobiles, automatic door opening and closing is often adopted. Many of them are sliding doors, back doors, tailgates and trunk lids. Except for sliding doors, gas dampers and spring balancers are installed. For automatic opening / closing, it is composed of an actuator that opens and closes, an actuator that pulls from a half latch to full lock, a pinch sensor, and an electronic control unit (ECU) that controls the sensor. The actuator that pulls from half-lock to full-lock has a function to release the latch. The automatic opening and closing of these doors has a manual mode in consideration of breakdowns, battery exhaustion, stopping during opening and closing such as pinching, etc., and a clutch that disconnects power transmission for automatic and manual switching is generally incorporated . An encoder is attached to detect the position of the door, and is attached to the output side of the clutch to detect the position of the door even during manual operation. As a result, the position of the door can be monitored even during manual operation, and automatic operation can be performed in the middle of opening and closing. The encoder can detect not only the position of the door but also the opening / closing speed of the door, and controls the output of the motor by inputting it to the electronic control unit. The present invention relates to an encoder retrofitted to a clutch incorporated in an actuator that opens and closes.

  A device that electrically opens and closes the back door of the vehicle body is installed, and the device can determine the operation of the back door based on the amount of change in the strain gauge, detect the opening and closing operation regardless of the stop position, and start the automatic opening and closing operation It has been known. (For example, refer to Patent Document 1.)

  2. Description of the Related Art A clutch device is known which is a clutch device and incorporates a rotational speed detection sensor on each of the input and output sides so that the disengagement can be accurately determined. (For example, see Patent Document 2.)

  An encoder that uses a multi-pole magnet, which is a so-called plastic magnet made of a magnetic material containing magnetic powder and thermoplastic resin. There are known devices. (For example, refer to Patent Document 3.)

  The electronic control device is configured to detect the amount of leakage magnetic flux generated in the electromagnetic clutch with a Hall IC and detect the rotation state of the rotating machine. Devices are known that are smaller than detectors that use coils and do not require the placement of other magnetic materials such as magnets. (For example, see Patent Document 4)

It is a rolling bearing unit, and a rubber magnet sheet formed by alternately magnetizing S poles and N poles constituting an encoder on a support ring is rounded and attached to cope with changes in the magnetic flux to be attached. There is known a device composed of a coil for inducing a voltage. (For example, refer to Patent Document 5.)

  In order to control an anti-brake system or a traction control system of an automobile, it is necessary to detect the rotation of a wheel, and a method of detecting a steel sheet voltage in a winding coil by a magnet and a transducer is known. (For example, see Patent Document 6.)

  Rubber magnets (magnet sheets) are commercially available as flexible belt members with magnetic poles alternately magnetized. Magnets that can be easily cut with scissors and cutter knives are available. ing. (For example, refer nonpatent literature 1.)

JP 2009-108605 A JP 2005-214234 A JP 2010-249536 A JP 2007-024257 A JP-A-10-253647 US Patent No. 5,200,277

Niroku Seisakusho Co., Ltd., “Magnet Product Catalog” P15-16, [Search on Dec. 5, 2011], Internet <URL: http: // www. 26magnet. co. jp / webshop / catalog. pdf>

  In Patent Document 1, a strain gauge is used, and a characteristic can be exhibited in detecting activation of an opening / closing operation. However, the speed and position detection during electric opening / closing cannot be detected digitally.

  In Patent Document 2, only a rotational speed is detected by a sensor provided to accurately determine disengagement, and position detection as an encoder cannot be performed. Because it is built into the clutch, it must be designed exclusively for each clutch.

  In Patent Document 3, the so-called plastic magnet formed of a magnetic material containing magnetic powder and a thermoplastic resin cannot be attached to a non-magnetic material because it must be joined and integrated with an iron core in an abutting state.

  In Patent Document 4, it is not necessary to arrange another magnetic body such as a magnet, but the encoder must be designed exclusively for each clutch.

  In Patent Document 5, although a rotation detection function is added to a rolling bearing, the space becomes large when used in combination with an existing clutch device. Further, the change of magnetic flux is detected by a coil, and when incorporated in a clutch, it is large and complicated, and has a dedicated design as described above.

  In Patent Document 6, an alternating voltage is detected by a magnet, a transducer, and a winding coil for rotation detection. However, when incorporated in a clutch, it is large and complicated, and has a dedicated design as described above.

  In order to solve the above-mentioned problems, the present invention provides a door opening / closing device that moves a door by the power of a motor via a clutch, wherein magnetic poles are alternately magnetized on the outer periphery of the driving wheel of the clutch. A door opening / closing control device comprising a flexible belt member, a magnetic detection device provided at a position facing the belt member, and a control circuit for detecting rotation of the clutch drive wheel.

  The second solving means is a door opening / closing control device which is a flexible member made of elastomer in which the belt member has alternating magnetic poles of N poles and S poles at a predetermined pitch.

  Furthermore, a third development means is a door opening / closing control device in which a door member that moves up and down at the rear of an automobile is supported by a balancer.

    By attaching a flexible band member with magnetic poles alternately magnetized to the outer periphery of the clutch drive wheel, an encoder can be constructed without producing a dedicated magnet and without depending on the outer diameter and material of the clutch. Further, since the encoder is configured using the outer periphery of the clutch, the encoder can be configured in a space-saving manner without modifying or changing the existing clutch.

  If you want to incorporate an encoder into the clutch, you can only design it as a clutch-integrated encoder, but if you use this method, there is no need for a dedicated design for each vehicle type and door type, and parts management and inspection are common. Can be used, and existing products can be used.

In the case of a two-phase encoder, if a magnetic detection unit composed of two magnetic sensors corresponding to the magnetization pitch of the S pole and N pole is made, rotation detection, rotation speed detection, rotation can be performed regardless of the outer diameter of the clutch. An encoder capable of speed detection can be configured. Moreover, the magnetization pitch of the S pole and the N pole and the magnetic detection unit are used as a set, and the resolution can be easily changed by changing the pitch.

  It is explanatory drawing of the vehicle body mounted | worn with the power slide door of this Embodiment 1.   It is explanatory drawing of the vehicle body mounted | worn with the power back door of this Embodiment 2. FIG.   It is explanatory drawing of the operation principle of the actuator for power slide doors by this Embodiment 1. FIG.   It is explanatory drawing of the operation principle of the actuator for power back doors by this Embodiment 2. FIG.   It is explanatory drawing of the encoder part by this Embodiment 1,2.   It is explanatory drawing of the magnet row adjustment part of the encoder by this Embodiment 1,2.   It is explanatory drawing which shows the example of the magnet single-piece | unit used for this Embodiment 1,2.   It is operation | movement explanatory drawing of the encoder when it drives from the motor side of this Embodiment 1, 2, ie, the state in which the clutch was turned on.   It is operation | movement explanatory drawing when the driven side is moved by the clutch of this Embodiment 1, 2 being OFF.   It is explanatory drawing of the signal input into the control apparatus from the encoder of this Embodiment 1,2.

  Hereinafter, the vehicle body 1 which employ | adopted the opening-and-closing actuator 3a with a clutch for the sliding door 2 for motor vehicles in Embodiment 1 by this invention is demonstrated. FIG. 1 shows a device that opens and closes a sliding door 2 with actuators 3a and 3b. The actuator is installed on the body side or in the door. FIG. 1 shows the case where it is installed in the body. As a method of transmitting power from the actuator 3a to the slide door 2, there is a belt or a wire cable 3b.

  A vehicle body 4 in which a clutch opening / closing actuator 6 is employed in an automobile back door 5 according to a second embodiment of the present invention will be described. FIG. 2 shows a device that opens and closes the back door 5 by transmitting power to the actuator 6 connected through a connecting rod 27. In the opening operation, the electronic control device 26 receives an opening signal from a remote control key or a switch, and after the latch of the auto closer 7 is released, the opening operation is performed by the actuator 6. When the open end is detected by the pulse count of the encoder, the actuator 6 stops the opening operation and turns off the clutch.

In the closing operation, the electronic control unit 26 receives the closing signal from the remote control key or the switch 23, performs the closing operation by the actuator 6, and when the auto closer 7 detects the half lock, the actuator 6 stops the closing operation, and the auto closer 7 Pull in until the latch is fully locked. The back door is provided with a balancer such as a gas damper 24 and a spring. This mechanism can be used for sedan type trunk lids as well.

  FIG. 3 shows a drive mechanism when the present invention is the wire cable type of the automobile slide door 2 of FIG. 1 according to the first embodiment and the actuators 3a and 3b are installed in the body. The output of the speed reducer integrated motor 10 a is input to the clutch 12. The output of the clutch 12 is connected to the wire cable take-up drum 31. By rotating the take-up drum 31, the slide door connecting bracket 35 moves to the left and right via the wire cable 32. Since the slide door connection bracket 35 is connected to the slide door 2 of FIG. 1, the slide door is opened and closed as a result. In the present invention, the clutch outer ring 12b of the clutch 12 is on the output side of the clutch 12, and a flexible magnet 14 formed by alternately magnetizing the S pole and the N pole is attached to the clutch outer ring 12b. A magnetic sensor 15a is mounted on the sensor board 15 to provide a compact and easily attachable encoder without modifying the clutch.

  In order to open and close the automobile back door 5 of FIG. 2 according to the second embodiment of the present invention, an actuator will be described with reference to FIG. The output of the motor 10 is input to the speed reducer 11 and the output of the speed reducer is input to the clutch 12. The output of the clutch 12 is input to the speed reducer 11 and transmitted to the output drive arm 28 to open and close the back door 5 via the connecting rod 27 in FIG. In the present invention, the clutch outer ring 12b of the clutch 12 is on the output side of the clutch 12, and a flexible magnet 14 formed by alternately magnetizing the S pole and the N pole is attached to the clutch 12 at a position facing the magnet 14. A magnetic sensor 15a is mounted on the sensor board 15 to be installed, and a compact and easily attachable encoder without modifying the clutch 12 is provided. When the clutch outer ring 12b rotates, an alternating magnetic field is generated in the magnetic sensor unit, converts the magnetism into an electric signal, and sends it to the electronic control unit 26 as a pulse signal. Thus, the electronic control unit 26 can detect the opening / closing angle and opening / closing speed of the back door and can control the output of the motor 10.

ただし、ｎは整数のこと。The mechanism of the encoder part of the present invention in the first and second embodiments will be described with reference to FIG. The case of an A-phase and B-phase two-phase encoder is taken as an example. A flexible belt member magnet 14 having S poles and N poles magnetized alternately is attached around the clutch outer ring 12b. The magnetization pitch of the magnets 14 is Pm. A sensor substrate 15 is installed at an opposing position, and two magnetic sensors 15a are installed there, and the pitch is Ps. The relationship between Ps and Pm can be expressed by the following equation.

However, n is an integer.

An alternating magnetic field is generated in the magnetic sensor unit when the clutch outer ring 12b rotates, and the magnetism is converted into an electric signal and output as a pulse signal to the electronic control unit, and the magnetic sensor output is as shown in FIG. When the clutch outer ring 12b rotates at a constant speed, the pulse signals output from the A-phase and B-phase magnetic sensors are 90 degrees out of phase. In the case of a two-phase encoder, the value obtained by multiplying the magnetized pitch of the magnet by an integer and adding +1/2 pitch is the pitch Ps between the magnetic sensors. As an example, when the magnetized pitch of the magnet is 5 mm, the pitch between the magnetic sensors is 2.5 mm, 7.5 mm, 12.5 mm, 17.5 mm,. When the magnetic sensor pitch Ps is 7.5 mm, if the diameter of the magnet attached to the clutch is 30.6 mm or more, the error is 1% or less. While the magnetic sensor is mounted on a linear printed circuit board, the magnet attached to the clutch is a circular arc, and the error increases as the diameter increases. Conversely, by narrowing the pitch between the magnetic sensors, the error is reduced and it becomes possible to deal with a small-diameter clutch. If the magnetic sensor is mounted on a flexible board and installed in a circular arc concentric with the magnet, there will be no error.

  A method of adjusting the circumference pasted to the clutch by the encoder magnet portion of the present invention will be described with reference to FIG. When a commercially available clutch outer ring 12b and magnet 14 are used, when a magnet is attached to the outer ring 12b of the clutch, the magnetization pitch of the joint portion may become irregular. In order to adjust this, an outer diameter adjusting spacer 13 is inserted into the outer ring 12b of the clutch. Thereby, the magnetization pitch of the joint portion can be made equal. If the magnetic sensor is mounted on a flexible substrate and bent into a circular arc concentric with the magnet, the error can be eliminated.

  FIG. 7 is an image view of a rubber magnet of a flexible band member in which magnetic poles used in the present invention are alternately magnetized. The flexible magnet formed by alternately magnetizing the S pole and the N pole can use the single-sided multi-pole magnetized pitch of a commercially available rubber magnet manufactured by Niroku Seisakusho Co., Ltd. Are lineup of 2.0mm, 2.5mm, 3,0mm, 5.0mm. When accuracy is required, the accuracy can be improved by using a narrow magnetizing pitch. (From the magnet product catalog of Nikko Manufacturing Co., Ltd.)

  In FIG. 8, when the clutch is ON and the motor rotates, power is transmitted to the speed reducer, clutch input side, clutch output side, speed reducer, and back door, and the back door is opened and closed. At that time, an encoder attached to the output side of the clutch detects the rotational speed and the rotational speed, recognizes the open / close angle, and performs open / close control. When the back door stops at an obstacle, or when a foreign object is caught and the opening / closing speed of the back door is slowed or stopped, an abnormality can be detected and the drive is stopped and an abnormality detection process is performed. The direction of the arrow indicates the direction of drive and signal transmission.

  In FIG. 9, when the clutch is OFF, power is transmitted to the reduction gear and the clutch output side when an abnormality occurs or when the back door is manually opened and closed. The electronic control unit can recognize the opening degree of the back door even if it is manually opened and closed by an encoder retrofitted to the clutch output side, and automatic opening and closing is possible from any state. The direction of the arrow indicates the direction of drive and signal transmission.

  The power sliding door and truck lid also have an automatic mode (electrical opening and closing) and a manual mode, similar to the back door. When an abnormality is detected during automatic opening and closing, the drive is stopped and the clutch is turned off to enable manual operation. In addition, after the opening operation, a manual closing operation is possible with the clutch off. Since the electronic control device needs to recognize the position of the door during manual operation, it is possible to add the encoder easily and inexpensively by attaching the encoder of the present invention to the output side of the clutch. Although it is possible to incorporate a single encoder, it is disadvantageous in terms of space, transmission mechanism for installation, and cost, and the problem is solved by adopting the encoder of the present invention that can be installed with minimum parts. The

  The electronic control unit monitors the start signal or start switch, and automatically opens and closes when the automatic mode is enabled. At that time, the door position is recognized by the number of pulses from the encoder, and control suitable for the opening is performed. Also, during automatic opening and closing, the electronic control unit monitors the pulse signal from the encoder and recognizes that the pulse time is long, that is, the opening and closing speed has slowed down, so that it is judged that a foreign object has been caught or an obstacle has been hit. It can be stopped. Even if the door is manually operated in the case of an abnormal stop, the electronic control device can always recognize the opening degree of the door because the encoder is attached to the output side (door side) of the clutch. As a result, the automatic opening / closing can be restarted from any position of the door so that the door can be opened / closed normally.

  Any clutch can be used as long as it can fix a flexible magnet formed by alternately magnetizing S poles and N poles on the outer periphery. Installation is possible without developing an encoder.

In automotive actuators, environmental performance is required, and the required performance can be satisfied by using a flexible magnet that clears −40 to 80 ° C.

  The material of the rubber magnet to be used is not limited as long as it is flexible. Select a thickness and material that are easy to install depending on the outer diameter of the clutch. In 73.08 made by KEB Japan Co., Ltd., the clutch is attached with a sheet thickness of 1.0 mm by one-sided multipolar magnetization / isotropy of a rubber magnet made by Niroku Seisakusho. If EW-610B manufactured by Asahi Kasei Electronics Co., Ltd. is used with a clearance of 0.5 mm, it functions as an encoder without any problem.

  As the magnetic sensor, an alternating magnetic field detection latch type Hall IC series (EW-610B, EW-710B, etc.) manufactured by Asahi Kasei Electronics Co., Ltd. or a similar Hall IC (A3187, A1227, etc.) manufactured by Allegro Microsystems is used for the Hall IC. it can.

  When 73.08 made by KE Japan Co., Ltd. is used for the clutch, the outer peripheral diameter of the outer ring of the clutch is Φ106. If a rubber magnet having an outer periphery of about 333 mm and a magnetization pitch of 2.5 mm is used, the number of poles becomes 133. Since the encoder is used with an even number of poles and the encoder is used with a quadruple ratio of 132 poles, it becomes 528 counts / rotation and a resolution of about 0.6818 ° / count. If the magnetization pitch is set to 5 mm, it becomes 264 counts / revolution by 4 times, and the resolution is about 1.3636 ° / count.

  In the above case, the rubber magnet is wound in a circumferential shape, and the end point portion is a magnetized portion having a non-equal pitch. In the combination of commercially available clutches and rubber magnets, there is a low possibility that the circumference and the rubber magnet length actually match. By programming that an electronic control device has an irregular portion at one rotation, the irregular portion can be controlled. If it is absolutely necessary to arrange magnets with equal pitches on the entire circumference, insert a spacer between the outer ring of the clutch and the rubber magnet so that the circumference is divisible by the magnetized pitch and make the outer ring diameter of the clutch slightly larger. Can be resolved.

  A method for adjusting the outer ring diameter of the clutch will be described with reference to FIG. When using commercially available clutch outer ring 12b and magnet 14, when magnet 14 is affixed to clutch outer ring 12b, the magnetization pitch of the joints may become irregular. In order to adjust this, an outer diameter adjusting spacer 13 is inserted into the clutch outer ring 12b. Thereby, the magnetization pitch of the joint portion can be made equal. Conversely, by leaving an anomalous part, it can also play the role of the Z phase in a general encoder serving as a reference point for one rotation.

  If it is not necessary to determine the rotational direction, one magnetic sensor can be used.

  A rubber magnet can be attached by using double-sided tape and adhesive, so that it is not necessary to cut holes or screws in the clutch, and it is possible to construct an easy and inexpensive encoder without modifying the existing clutch.

1: Car body with sliding door 2: Sliding door 3a: Electric actuator for sliding door (motor, reducer, clutch)
3b: Electric actuator for sliding door (wire cable, rail)
4: Car body with back door 5: Back door 6: Electric actuator for back door 7: Auto closer 10: Motor 10a: Reducer integrated motor 11: Reducer 12: Clutch 12a: Clutch inner ring 12b: Clutch outer ring 13: Clutch outer shape adjustment Spacer 14: Magnet 15: Sensor board 15a: Magnetic sensor 21: Pinch sensor 22: Outer handle 23: Closed switch 24: Gas damper 25: Striker 26: Electronic control unit (ECU)
27: Connecting rod 28: Drive arm 29: Switch 31: Wire cable take-up drum 32: Wire cable 33: Pulley 34: Slide door rail 35: Slide door connecting bracket

Claims (3)

  In a door opening and closing device that moves a door by the power of a motor via a clutch, a flexible belt member with magnetic poles alternately magnetized on the outer periphery of a clutch drive wheel and a position facing a pre-roll belt member A door opening / closing control device comprising a magnetism detection device and a control circuit for detecting the rotation of the clutch drive wheel.   2. The door opening / closing control device according to claim 1, wherein the belt member is an elastomeric flexible member having alternating magnetic poles of N poles and S poles at a predetermined pitch.   The door opening / closing control device according to claim 1, wherein a door member that moves up and down at a rear portion of the automobile is supported by a balancer.

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