JP2004044112A - Position detection device for slide door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position detection device for an electric slide door capable of detecting a position of the electric slide door with high accuracy and, at the same time, also reducing the number of mounting manhours to a vehicle with high reliability at a low cost. <P>SOLUTION: The position detection device for the electric slide door includes a motor 102 for opening, closing and driving the slide door 106, a reducer 103 continuously connected to the motor 102 and a potentiometer meter 11 for detecting a rotational angle of a rotary shaft 103a of the reducer 103 in order to detect an opening and closing position of the slide door 106, and the potentiometer 11 is embedded in a recess section 103b bored in the reducer 103. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric slide door position detection device that can detect the position of an electric slide door.
[0002]
[Prior art]
In recent years, vehicles 100 provided with an electric sliding door system are commercially available. In arranging the electric sliding door system in a vehicle, a driving device (motor) for driving the sliding door 106 is, of course, an open / close position of the sliding door 106 driven by the driving device. Need to be detected.
[0003]
As one method for detecting the position of the slide door 106, a method in which a limit switch 91 is provided on the vehicle body 101 shown in FIG. As shown in FIG. 8, a limit switch 91 is provided at each of the lower right end and the lower left end of the door frame of the vehicle body 101. The limit switch 91 is provided by a trigger (not shown) provided on the slide door 106. , 92 are turned on, an electric signal is output. The fully open position and the fully closed position of the slide door 106 can be detected.
[0004]
However, in the method of detecting the door position by the limit switch 91, it is necessary to arrange a number of limit switches 91 on the vehicle body 101 side in order to detect the position of the sliding door with high accuracy. For this reason, there has been a problem that the work of attaching the limit switch 91 to the vehicle body 101 and the work of attaching the trigger to the slide door 106 become complicated.
[0005]
Further, since the limit switches 91 and 92 are configured to be exposed to the outside, the limit switches 91 and 92 must be rust-proof and the material of the limit switches 91 and 92 themselves must be a rust-proof material. However, there is a problem that the manufacturing cost is increased.
[0006]
On the other hand, as another method for detecting the position of the sliding door, there is a method using a pulse sensor. According to this method, it is possible to detect the position of the sliding door by counting the pulses generated according to the movement of the door.
[0007]
However, since the price of the pulse sensor itself is expensive, there has been a problem that as a result, the manufacturing cost of the position detection device increases.
[0008]
The present invention has been made to solve the above problems, and the present invention can detect the position of the sliding door with high accuracy, and can also reduce the number of man-hours for mounting on a vehicle. Still another object of the present invention is to provide a highly reliable and inexpensive slide door drive device.
[0009]
[Means for Solving the Problems]
The position detecting device for a sliding door according to claim 1, wherein the motor for opening and closing the slide door, a speed reducer connected to the motor, and the speed reducer for detecting an open / close position of the slide door. A potentiometer for detecting the rotation angle of the rotation shaft portion of the reduction gear, the potentiometer is buried in a recess formed in the reduction gear, the rotation shaft portion of the potentiometer in the buried state and the reduction gear A connecting member for connecting the rotating shaft and a rotating shaft of the speed reducer connected to the rotating shaft of the potentiometer via the connecting member also prevent the body of the potentiometer from rotating. A rotation preventing member.
[0010]
According to a second aspect of the present invention, there is provided a position detecting device for a sliding door according to the first aspect of the present invention, wherein the position detecting device is attached to and fixed to the speed reducer in order to prevent the potentiometer from coming out of a recess formed in the speed reducer. And a rotation that comes into surface contact with the outer peripheral flat portion of the main body of the potentiometer in order to prevent the rotation of the potentiometer erected on the escape prevention piece and embedded in the speed reducer. Equipped with a prevention piece.
[0011]
According to a third aspect of the present invention, in the position detecting apparatus for a sliding door according to the first or second aspect, both the detachment preventing piece and the rotation preventing piece are formed from a single metal piece. The rotation preventing piece is formed by folding a notch formed in the metal piece.
[0012]
According to a fourth aspect of the present invention, there is provided a slide door position detecting device according to the third aspect, wherein the detachment preventing piece has a detachable edge formed at the edge of a hole formed after the rotation preventing piece is folded up. An anti-extraction claw is provided.
[0013]
The position detecting device for a sliding door according to claim 5 is the position detecting device for a sliding door according to any one of claims 1 to 4, wherein the connecting member is made of a material having a high coefficient of friction, and It is constituted by a friction ring that contacts both the peripheral surface of the rotary shaft of the potentiometer and the wall surface of the concave portion of the speed reducer when assembled in the concave portion.
[0014]
According to a sixth aspect of the present invention, there is provided the position detecting device for a sliding door according to any one of the first to fifth aspects, wherein the rotation shaft of the motor is constituted by a worm gear, and the rotation of the speed reducer. The shaft portion is constituted by a worm wheel having a concave portion, and the potentiometer is fitted into the concave portion of the worm wheel.
[0015]
According to a seventh aspect of the present invention, there is provided the position detecting device for a slide door according to any one of the first to sixth aspects, further comprising a winding drum for winding a wire or a chain connected to the slide door. The winding drum is disposed on a side of the worm wheel opposite to the side on which the potentiometer is disposed.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Needless to say, the following embodiments are merely preferred embodiments of the present invention, and the technical scope of the present invention is not limited to the following embodiments.
[0017]
FIG. 1 is a schematic diagram showing a state in which a slide door position detecting device (hereinafter simply referred to as “position detecting device”) 1 according to an embodiment of the present invention is mounted on a vehicle 100, and FIG. FIG. 4 is a schematic diagram of an opening / closing drive mechanism of a slide door 106.
[0018]
First, an outline of an electric sliding door system for a vehicle will be described with reference to FIGS. 1 and 2. When a predetermined switch operation is performed by a rider of the vehicle 100, a signal is transmitted from the ECU 12 to a driver unit (not shown) of the motor 102, and the motor 102 mounted on the vehicle body 101 rotates. The rotation (driving force) of the motor 102 is transmitted through a speed reducer 103, a winding drum 104, and a wire (a kind of traction tool, of course, a chain or belt other than a wire) 105. It is transmitted to 106. By transmitting the rotation of the motor 102 to the slide door 106 in this way, the slide door 106 is slid (slid) in the arrow A direction or the arrow B direction, that is, opened (arrow B direction) or closed (arrow B). (In the direction of arrow A). The opening and closing speed of the slide door 106 is proportional to the motor current (Im).
[0019]
FIG. 3 is a partial sectional view of the position detecting device 1 according to one embodiment of the present invention, and FIG. 4 is a plan view of the position detecting device 1 shown in FIG. As shown in FIGS. 3 and 4, the position detecting device 1 includes a motor 102, a speed reducer 103, a potentiometer 11, an O-ring 13, a removal prevention piece 14, a winding drum 104, an ECU 12 ( FIG. 1).
[0020]
The motor 102 drives the opening and closing of the slide door 106 as described above, and is attached and fixed to the vehicle body 101 side. The rotating shaft of the motor 102 is constituted by a worm gear 102a having a thread groove.
[0021]
The reduction gear 103 is connected to the motor 102 and reduces the rotation speed of the motor 102 to an appropriate rotation speed. By reducing the rotation speed by the reduction gear 103, the capacity of the motor 102 is reduced. However, the torque required to open and close the slide door 106 can be obtained. The rotation shaft of the speed reducer 103 is constituted by a wheel shaft 103a1 disposed on the center side of the worm wheel 103a that meshes with the worm gear 102a of the motor 102. Needless to say, the worm wheel 103a and the wheel shaft 103a1 are not limited to separate members, and may be integrated.
[0022]
The potentiometer 11 is (one means) for detecting the position of the slide door 106, and for measuring the rotation angle (amount) of the motor 102 via the speed reducer 103, as shown in FIGS. The reduction gear 103 is embedded coaxially with the worm wheel 103 a (wheel shaft 103 a 1) (the center of rotation is the same) and in a recess 103 b formed in the reduction gear 103. The potentiometer 11 outputs a voltage having a magnitude corresponding to the rotation angle of the reduction gear 103 (in this embodiment, the rotation angle of the motor 102 is detected as the rotation angle of the reduction gear 103) (hereinafter, for convenience, "potentiometer output"). Voltage) is output in analog form. Here, since the rotation angle of the speed reducer 103 and the position of the slide door 106 correspond one-to-one, the position of the slide door 106 is determined based on the magnitude of the analog output potentiometer output voltage (Vp). Can be detected. Therefore, the position of the slide door 106 can be detected with high accuracy and at low cost as compared with the conventional method (limit switch method, pulse sensor method). Also, when the vehicle manufacturer attaches the position detection device 1 to the vehicle 100, any sensor (for example, a sensor or a trigger) is attached to the vehicle body 101 and the slide door 106 for the worker of the vehicle manufacturer. In other words, it is possible to prevent the complicated work of wiring the harness (cable) in consideration of the movement amount of the slide door 106, in other words, to reduce the labor of the worker required for the mounting process of the position detection device 1. It can be reduced. The rotation angle of the motor 102 may be measured directly without passing through the speed reducer 103. However, the height of the potentiometer 11 can be reduced by using the speed reducer 103 or the control is complicated. Can be eliminated, which is preferable. Further, the depth of the concave portion 103b formed in the speed reducer 103 can be reduced, and the effect of preventing rotation can be achieved even if the thickness of the rotation preventing piece portion 14a described later is thin. It is preferable from the viewpoint that it can be performed.
[0023]
Further, as described above, the potentiometer 11 is fixed while being buried in the recess 103b of the speed reducer 103. Therefore, the potentiometer 11 can be integrated with the speed reducer 103 and the motor 102 (in a single package), that is, the position detecting device 1 having a driving function can be provided. Further, since the concave portion 103b of the speed reducer 103 is mainly formed on the wheel shaft 103a1 (constituted by the wheel shaft 103a1 having a concave surface on one side), the height of the concave portion 103b can be reduced. Thus, the position detecting device 1 can be made more compact.
[0024]
The O-ring 13 is for connecting the rotating shaft 11a of the potentiometer 11 fitted into the recess 103b of the reduction gear 103 and the worm wheel 103a, and is made of a material having a high friction coefficient. When the speed reducer 103 is assembled to the concave portion 103b, it contacts both the peripheral surface of the rotating shaft portion 11a of the potentiometer 11 and the inner wall surface of the concave portion 103b of the speed reducer 103. Therefore, the rotation of the worm wheel 103a can be transmitted to the rotation shaft 11a of the potentiometer 11 although the configuration is simple. In addition, it is possible to easily provide a connecting mechanism for the assembling operation.
[0025]
As shown in FIGS. 3 and 4, the removal prevention piece 14 is for preventing the removal of the potentiometer 11 buried and fixed in the recess 103 b of the speed reducer 103. The prevention piece 14 is provided with a rotation prevention piece part 14a for preventing the main body part 11b of the potentiometer 11 embedded in the concave part 103b of the reduction gear 103 from rotating with the rotation of the rotation shaft part 11a. Is established. The rotation preventing piece 14a restricts the rotation of the potentiometer 11 by contacting the outer peripheral flat portion 11c of the main body 11b of the potentiometer 11. Therefore, the rotation can be restricted in spite of the simple mechanism. In addition, the concave portion 103b of the speed reducer 103 can be increased by the thickness of the rotation preventing piece portion 14a, so that the operation of inserting the potentiometer 11 can be prevented from being complicated.
[0026]
FIG. 5D is a plan view of the detachment prevention piece 14. As shown in FIG. 5 (d), the removal prevention piece 14 is provided on each side with a removal prevention claw 14c protruding from the hole edge 14b. Therefore, the detachment can be prevented by a simple mechanism. A mounting hole 14d is formed in the removal prevention piece 14, and the removal prevention piece 14 is fixed to the case body 103c of the speed reducer 103 via the mounting hole 14d.
[0027]
FIG. 5 and FIG. 6 are views showing each forming process in the two embodiments of the detachment prevention piece 14. In forming the detachment preventing piece 14, first, as shown in FIG. 5B, a notch 200a is formed in one metal disk piece 200 (see FIG. 5A). Then, as shown in FIG. 5C, by turning up the notch 200a, the rotation preventing piece 14a is formed. Further, a portion which remains after the folding up forms a removal prevention claw portion 14c. After the formation of the removal prevention claw portion 14c, the mounting hole 14d is formed to complete the process of forming the removal prevention piece 14. As described above, since the removal prevention piece 14 having both the rotation prevention mechanism and the removal prevention mechanism is formed from one metal disk piece, the manufacturing cost of the position detecting device 1 can be reduced.
[0028]
On the other hand, the forming process shown in FIGS. 6A to 6C shows a process of forming a bar portion 14e instead of a process of forming a claw portion 14c on a hole edge portion 14b.
[0029]
Next, an assembly process of the potentiometer 11 will be described with reference to FIG. First, the potentiometer 11 is fitted into the concave portion 103b formed in the speed reducer 103. Then, the detachment prevention piece 14 is further placed thereon. As described above, the potentiometer 11 as the position detecting means can be easily fixed to the speed reducer 103 which is a part of the driving device without providing any sensors or the like on the slide door 106 side. FIG. 7 is a partial sectional view for easy understanding of the invention.
[0030]
The ECU 12 performs control necessary for running the vehicle 100, control necessary for operating various accessories such as a car navigation system, and the like. It is composed of devices (RAM, ROM, etc.), converters (A / D converter, D / A converter) and the like.
[0031]
Here, an example of specific control executed by the ECU 12 will be described. As shown in FIG. 2, the ECU 12 converts the potentiometer output voltage (Vp) and the motor current (Im) into digital signals at predetermined time intervals (for example, every 1 ms) and detects ((1), (2)). The position of the slide door 106 is detected based on the digitally converted potentiometer output voltage and motor current. Then, a control signal is transmitted to the drive unit of the electric motor 102 according to the detected position ((3)).
[0032]
The winding drum 104 is disposed (attached and fixed) coaxially (with the rotation center being the same center) with the worm wheel 103 a (rotating shaft) of the reduction gear 103, and a wire 105 is attached to the winding drum 104. The slide door 106 is mounted and opened and closed by winding the wire 105. The winding drum 104 is provided on the worm wheel 103a on the side opposite to the side where the potentiometer 11 is provided. Therefore, the winding drum 104 can be integrated with the position detecting device 1 in spite of a simple mechanism. The winding drum 104 is protected by a drum cover 104d.
[0033]
As described above, the present invention has been described based on the embodiments. However, it can be easily inferred that the above embodiments can be variously modified and modified without departing from the spirit of the present invention. The technical scope of the present invention includes these various modifications.
[0034]
For example, according to the present embodiment, the O-ring 13 connects the rotation shaft 11a of the potentiometer 11 assembled (fitted) into the recess 103b of the speed reducer 103 and the worm wheel 103a. . However, the connection mechanism between the rotating shaft portion 11a of the potentiometer 11 and the worm wheel 103a is not necessarily limited to the O-ring 13, but may be connected by another connection mechanism. Specifically, by fitting a thin plate or a spring or the like to a groove 11c formed at the tip of the rotating shaft portion 11a of the potentiometer 11, and fixing the thin plate or the spring to the inner wall surface of the worm wheel 103a, The worm wheel 103a and the rotating shaft of the potentiometer 11 may be connected. The same applies to a case where a groove (not shown) is formed along the axial direction of the peripheral wall of the rotating shaft portion 11a of the potentiometer 11.
[0035]
【The invention's effect】
According to the position detection device for a slide door, a potentiometer for detecting an open / close position of the slide door is buried in a recess formed in the speed reducer, and the potentiometer inserted into the recess is used. Since the rotation angle of the rotation shaft of the reduction gear is detected, the position of the electric slide door can be detected with high accuracy, and the amount of harness required to detect the open / close position of the slide door is greatly reduced. This has the effect of being able to reduce. Further, since the potentiometer is buried in the recess formed in the speed reducer as described above, there is an effect that the slide door position detecting device can be integrated with the slide door opening / closing drive device (one package).
[0036]
On the other hand, even when the rotation shaft of the speed reducer connected to the rotation shaft of the embedded potentiometer via the connection member is rotated by the rotation preventing member, the rotation of the rotation shaft of the speed reducer also causes the potentiometer to rotate. Is also prevented from rotating, so that there is an effect that a highly accurate slide position detecting device can be realized by a simple mechanism.
[0037]
According to the position detecting device for a sliding door according to the second aspect, in addition to the effect of the position detecting device for the sliding door according to the first aspect, a hole is formed in the speed reducer by a detachment preventing piece attached to and fixed to the speed reducer. The detachment of the potentiometer from the recessed portion is prevented, and the rotation preventing piece erected on the detachment preventing piece comes into surface contact with the outer peripheral flat portion of the body of the potentiometer. Thus, the potentiometer buried in the speed reducer can be prevented from rotating.
[0038]
According to the position detecting device for a sliding door according to the third aspect, in addition to the effect of the position detecting device for a sliding door according to the first or second aspect, both the detachment prevention piece and the rotation prevention piece are one metal piece. Since the rotation preventing piece is formed by turning up the notch formed in such a metal piece, it is possible to remove and rotate the potentiometer despite its simple configuration. This has the effect that it can be prevented.
[0039]
According to the position detecting device for a sliding door of the fourth aspect, in addition to the effect of the position detecting device for a sliding door of the third aspect, the detachment preventing piece is formed after the rotation preventing piece is folded up. Since the anti-detachment claw is provided at the edge of the hole formed, even when both the anti-detachment piece and the anti-rotation piece are formed from one metal piece, the extraction can be firmly prevented. This has the effect.
[0040]
According to the position detecting device for a sliding door of the fifth aspect, in addition to the effect of the position detecting device for a sliding door according to any one of the first to fourth aspects, the position detecting device for a potentiometer is made of a material having a high coefficient of friction. When the speed reducer is assembled to the recess, the connecting member is constituted by a friction ring that comes into contact with both the peripheral surface of the rotating shaft of the potentiometer and the inner wall surface of the recess, so the structure is simple and the connecting mechanism can be easily assembled. This has the effect that it can be provided.
[0041]
According to the position detecting device for a sliding door according to the sixth aspect, in addition to the effect of the position detecting device for a sliding door according to any one of the first to fifth aspects, the rotating shaft portion of the motor is constituted by a worm gear. On the other hand, the rotating shaft portion of the speed reducer is constituted by a worm wheel, and a potentiometer is inserted into a concave portion provided in the worm wheel, so that a mechanism for attaching the potentiometer to the speed reducer is simplified. It has the effect of being able to.
[0042]
According to the position detecting device for a sliding door according to the seventh aspect, in addition to the effect of the position detecting device for a sliding door according to any one of the first to sixth aspects, further, the worm wheel is located on the opposite side from the side where the potentiometer is provided. A winding drum for winding a wire or a chain connected to the sliding door is provided on the side, so that the winding mechanism can be wound with respect to the sliding door position detecting device despite a simple mechanism. This has the effect that the drum can also be integrated.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a vehicle equipped with a slide door position detection device (position detection device) according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of an opening / closing drive mechanism of a slide door.
FIG. 3 is a partial cross-sectional view of the position detection device.
FIG. 4 is a plan view of the position detection device shown in FIG.
FIG. 5 is a view showing one forming step of the removal prevention piece constituting the position detecting device. In detail, (a) is a perspective view of one metal disk piece, (b) is a perspective view showing a step of forming a notch in the metal disk piece, and (c) is a notch. FIG. 4D is a perspective view showing a step of folding up, and FIG. 4D is a plan view of the removal prevention piece 14 after formation.
FIG. 6 is a view showing another forming step of the removal preventing piece constituting the position detecting device. Specifically, (a) is a perspective view showing a step of forming a notch in a metal disk piece, (b) is a perspective view showing a step of folding the notch, and (c) is a perspective view showing a step of folding the notch. It is a perspective view of the removal prevention piece 14 after.
FIG. 7 is a view showing an assembling process of the position detecting device.
FIG. 8 is a conceptual diagram of a vehicle equipped with a conventional slide door position detecting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Position detecting device 11 for sliding door Potentiometer 11a Rotating shaft 12 ECU
13 O-ring 14 Removal prevention piece 101 Vehicle body (body)
102 Motor 102a Worm gear 103 Reduction gear 103a Worm wheel (rotary shaft)
104 Winding drum 106 Slide door 107 Wire (traction means)
200 Metal disk piece 200a Notch

Claims (7)

A motor for opening and closing the sliding door,
A speed reducer connected to the motor;
A potentiometer for detecting a rotation angle of a rotation shaft portion of the speed reducer for detecting an open / close position of the slide door,
The potentiometer is embedded in a recess formed in the speed reducer,
A connecting member for connecting the rotating shaft of the potentiometer and the rotating shaft of the speed reducer in the buried state,
A rotation preventing member for preventing the main body of the potentiometer from rotating with the rotation of the rotating shaft of the speed reducer connected to the rotating shaft of the potentiometer via the connecting member. Position detecting device for a sliding door. A detachment prevention piece attached to and fixed to the speed reducer to prevent the removal of the potentiometer from the recess formed in the speed reducer;
In order to prevent rotation of the potentiometer erected on the removal prevention piece and embedded in the speed reducer, a rotation prevention piece that comes into surface contact with the outer peripheral flat portion of the main body of the potentiometer is provided. The position detecting device for a sliding door according to claim 1, wherein: Both the removal prevention piece and the rotation prevention piece are formed by processing a single metal piece,
The position detecting device for a sliding door according to claim 1, wherein the rotation preventing piece is formed by folding a notch formed in the metal piece. The position detecting device for a slide door according to claim 3, wherein the detachment preventing piece has a detachment preventing claw provided at an edge of a hole formed after the rotation preventing piece is folded up. The connecting member is made of a material having a high coefficient of friction, and in a state where the potentiometer is mounted on the concave portion of the speed reducer, is constituted by a friction ring that comes into contact with both the peripheral surface of the rotary shaft of the potentiometer and the concave portion wall surface of the speed reducer. The position detecting device for a sliding door according to any one of claims 1 to 4, wherein: The rotating shaft of the motor is constituted by a worm gear,
The rotation shaft of the reduction gear is constituted by a worm wheel having a concave portion,
The position detecting device for a sliding door according to any one of claims 1 to 5, wherein the potentiometer is fitted into a concave portion of the worm wheel. Equipped with a winding drum for winding the wire or chain connected to the sliding door,
7. The slide door position detecting device according to claim 1, wherein the winding drum is disposed on a side of the worm wheel opposite to a side on which the potentiometer is disposed.

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