JP2016074363A - Door driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door driving device which reduces the number of driving sources for driving doors and achieves downsizing in an air conditioner for a vehicle which includes the opening/closing doors.SOLUTION: A door driving device 11 is formed including a belt mechanism 14, a driving motor 15, and a switching mechanism 16. Power from the driving motor 15 is transmitted to a door shaft 13 of an opening/closing door by the belt mechanism 14. The switching mechanism 16 includes a pulley 20, a clutch plate, and a slide part and causes the clutch plate to slide to switch a state of the door between a transmission state and an interruption state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a door driving device that drives an opening / closing door of a ventilation path in a vehicle air conditioner.

  2. Description of the Related Art Conventionally, a vehicle air conditioner is provided with a plurality of open / close doors that open and close a ventilation path, such as an inside / outside air switching door, an air mix door, and a blow mode switching door. In order to drive the open / close door, for example, an actuator such as a servo motor that individually drives each open / close door is installed (see, for example, Patent Document 1).

JP 2010-63310 A

  In the configuration described in Patent Document 1 described above, it is necessary to install a servo motor for each axis of the opening / closing door to be driven. Therefore, it is necessary to increase the number of installed servo motors every time a ventilation path switching function of the vehicle air conditioner is added. As a result, there is a problem that the size of the vehicle air conditioner increases.

  Accordingly, the present invention has been made in view of the above-described problems, and in a vehicle air conditioner including a plurality of opening and closing doors, the door can be reduced in size by suppressing the number of drive sources that drive each door. An object is to provide a drive device.

  The present invention employs the following technical means in order to achieve the aforementioned object.

  The present invention is a door drive device that is provided in a vehicle air conditioner and drives a plurality of opening and closing doors that open and close a ventilation path in an air conditioning case, and each opening and closing door is angularly displaced. Each supporting door shaft is provided, and a belt mechanism that transmits power to each door shaft by a belt, a drive source that supplies power to the belt, and each door shaft that transmits power from the belt mechanism to the door shaft. And a switching mechanism that switches between a transmission state that is not transmitted to the door shaft and a blocking state that is not transmitted to the door shaft.

  According to the present invention as described above, the door drive device includes a belt mechanism, a drive source, and a switching mechanism. Power from a drive source is transmitted to the door shaft of the open / close door by a belt mechanism. Therefore, if there is at least one drive source for driving the belt, a plurality of open / close doors can be driven. Further, the transmission state and the cutoff state can be switched for each door shaft by the switching mechanism. As a result, power from the belt can be transmitted only to the door shaft that is to be angularly displaced. Therefore, even with one drive source, the selected door shaft can be driven. Since the number of drive sources can be reduced in this way, it is not necessary to install the same number of drive sources as the open / close door as in the prior art, and the installation space for the drive sources can be reduced. Therefore, the vehicle air conditioner can be reduced in size.

  In addition, the code | symbol in the bracket | parenthesis of each above-mentioned means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a side view which shows the vehicle air conditioner. It is sectional drawing which expands and shows the door drive device 11 in the interruption | blocking state. It is sectional drawing which expands and shows the door drive device 11 in a transmission state.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. The vehicle air conditioner 10 is a so-called auto air-conditioning system configured to control an air-conditioning unit that air-conditions a vehicle interior by an air-conditioner ECU in a vehicle such as an automobile. The air conditioning unit is an air conditioner unit that can adjust the temperature of the space in the passenger compartment and change the air outlet mode. The air conditioning unit includes an air conditioning case 12 that is disposed in front of the vehicle interior of the vehicle and through which the blown air passes.

  The air conditioning case 12 is formed with an air inlet on one side and a plurality of air outlets through which air toward the passenger compartment passes on the other side. The air conditioning case 12 has a ventilation path through which the blown air passes between the air intake and the air outlet.

  In the air conditioning case 12, a plurality of opening / closing doors 13 for opening and closing the ventilation path are provided. The open / close door 13 is, for example, a defroster door, a face door, or a foot door that functions as an outlet switching door. The air outlet switching door switches the air outlet mode by opening and closing. Examples of the outlet mode include a face mode, a bi-level (B / L) mode, a foot mode, a foot / defroster mode, and a defroster mode.

  The open / close door 13 is, for example, an air mix door for adjusting the temperature of the vehicle interior space. The air mix door adjusts the air volume ratio between the cold air passing through the evaporator and the hot air passing through the heater core according to the opening degree. The open / close door 13 is, for example, a rear outlet door that opens and closes the outlet of the rear seat.

  The door drive device 11 of this embodiment includes four open / close doors 13 that control ventilation, a belt mechanism 14 that drives the open / close door 13, a drive motor 15 that provides power to the belt mechanism 14, and power to the open / close door 13. And a switching mechanism 16 for controlling the transmission state.

  The drive motor 15 is a drive source, and one drive motor 15 is used in this embodiment. The drive motor 15 is provided outside the air conditioning case 12. The drive motor 15 is, for example, a servo motor. The driving force of the rotational motion is output to the belt mechanism 14 via the drive shaft 17 of the drive motor 15.

  The belt mechanism 14 includes a belt 18 and a tensioner 19. The belt mechanism 14 transmits power to the door shafts 13 a of the four open / close doors 13 by the belt 18. As shown in FIG. 1, an annular belt 18 is hung on the drive shaft 17 of the drive motor 15. The belt 18 is also hung on the pulley 20 of the switching mechanism 16 of the four open / close doors 13. As a result, when the drive shaft 17 of the drive motor 15 rotates, the belt 18 is unwound and each pulley 20 rotates due to the frictional force of the belt 18.

  A tensioner 19 is provided on the side surface of the air conditioning case 12. The tensioner 19 is an idling rotating plate that suppresses the slackness of the belt 18. The tensioner 19 is also installed to adjust the path of the belt 18.

  The open / close door 13 is a flat plate door made of resin. The open / close door 13 is configured integrally with a door substrate portion having a rectangular planar shape and a door shaft 13a formed at one end of the door substrate portion. The door substrate portion is disposed in the ventilation path in the air conditioning case 12 and serves as a part for opening and closing the ventilation path.

  The door shaft 13a is provided so as to protrude outward from the air conditioning case 12, and is supported by the air conditioning case 12 so as to be angularly displaced. As shown in FIGS. 2 and 3, the door shaft 13a is formed with a notch 21, and the switching mechanism 16 is connected to the notch 21 of the door shaft 13a so as to drive the open / close door 13. It is composed.

  The door shaft 13 a is provided in a cylindrical bearing portion 22 provided in the air conditioning case 12. An electromagnet 23 is built in the tip of the bearing portion 22. Moreover, the front-end | tip part of the bearing part 22 is provided with the latching claw 24 which protrudes outside. The locking claw 24 restricts the displacement of the pulley 20 in the axial direction. A case side friction plate 25 is provided at the tip of the bearing portion 22. The case-side friction plate 25 is excellent in frictional force and is provided so that the frictional force is increased when it comes into surface contact. The case side friction plate 25 is realized by cork, for example.

  The switching mechanism 16 is provided on each door shaft 13a and switches between a transmission state in which the power of the belt mechanism 14 is transmitted to the door shaft 13a and a cut-off state in which the power is not transmitted to the door shaft 13a. The switching mechanism 16 includes a pulley 20, a clutch plate 26, a slide portion 27, and a tension spring 28.

  The pulley 20 is provided for each door shaft 13a, and the power from the belt 18 is transmitted over both the transmission state and the cutoff state. As shown in FIGS. 1 and 2, the pulley 20 has a belt 18 hung on a groove on the outer peripheral surface thereof, and is driven by the belt 18. As shown in FIG. 2, the pulley 20 is a circular cylindrical body having a bottom and is a so-called pan shape. The pulley 20 forms an accommodation space for accommodating the clutch plate 26 therein.

  A pulley side friction plate 29 is provided at the bottom of the pulley 20. The pulley-side friction plate 29 is provided with an excellent frictional force so that the frictional force is increased when it comes into surface contact. The pulley-side friction plate 29 is realized by cork, for example.

  Further, a convex portion 30 that is convex inward is provided at the tip of the pulley 20 on the air conditioning case 12 side. The convex portion 30 is a portion with which the locking claw 24 of the bearing portion 22 can be engaged. Therefore, the inner diameter of the protrusion 30 is smaller than the outer diameter of the locking claw 24. The pulley 20 is locked by the locking claw 24 and can rotate freely with respect to the air conditioning case 12.

  The clutch plate 26 is provided for each door shaft 13a, connected in the rotational direction of the door shaft 13a, and slidably displaced in the axial direction of the door shaft 13a. The clutch plate 26 is provided inside the pulley 20. The clutch plate 26 includes a disk-shaped main body 31 and a protrusion 32 protruding from the main body 31. The main body 31 is accommodated in the pulley 20, and the protrusion 32 protrudes from the pulley 20.

  The protruding portion 32 is disposed inside the bearing portion 22. The tip of the protrusion 32 is inserted into the notch 21 formed in the door shaft 13a. The tip of the protrusion 32 is connected to the rotation direction by the notch 21. Therefore, when the protrusion 32 rotates, the door shaft 13a also rotates. The protrusion 32 is slidable in the axial direction with respect to the notch 21. Therefore, the notch 21 is fitted to the protrusion 32 so as to act as a guide in the axial direction. When viewed as a whole, the clutch plate 26 is configured such that the clutch plate 26 can move in the axial direction with respect to the door shaft 13a. Further, when viewed as a whole, the clutch plate 26 is restrained in the rotational direction with respect to the door shaft 13a and can transmit the rotational motion.

  The slide part 27 is provided in the air conditioning case 12 for each door shaft 13a, and changes the relative position between the pulley 20 and the clutch plate 26. An electromagnet 23 is used as a power source for the slide portion 27. The bearing portion 22 is provided with the electromagnet 23 as described above. A permanent magnet 33 is built in a portion of the clutch plate 26 that faces the tip of the bearing portion 22. When the electromagnet 23 is energized to generate a magnetic force, the magnetic pole is set so as to repel the permanent magnet 33. As a result, when the electromagnet 23 is energized, the protrusion 32 is guided by the bearing 22 and the clutch plate 26 is displaced in a direction away from the case.

  The tension spring 28 is an elastic member and is provided between the door shaft 13 a and the clutch plate 26. The tension spring 28 applies an elastic force in a direction in which the clutch plate 26 is separated from the pulley 20. In other words, the tension spring 28 acts in a direction in which the clutch plate 26 is pulled toward the air conditioning case 12 side. Therefore, when the electromagnet 23 is not energized, the clutch plate 26 is pulled toward the air conditioning case 12 by the tension spring 28 as shown in FIG.

  The air conditioner ECU controls the switching mechanism 16 installed on each door shaft 13a. Each door shaft 13a is provided with detection means for detecting the rotation angle of each door shaft 13a. The detection means is realized by a potentiometer or a magnetic encoder, for example. The detecting means gives the detected information to the air conditioner ECU. The air conditioner ECU controls the open / close state of each open / close door 13 based on information from the detection means. Further, when driving the open / close door 13, the air conditioner ECU energizes the electromagnet 23 corresponding to the door shaft 13 a to be driven and drives the drive motor 15.

  Next, the operation of the door drive device 11 will be described. In the shut-off state shown in FIG. 2 in which the open / close door 13 is not driven, the clutch plate 26 installed inside the pulley 20 is pulled toward the air conditioning case 12 by the pull spring 28. As a result, the air conditioning case 12 and the clutch plate 26 are contact-coupled by the case side friction plate 25 and are fixed to the air conditioning case 12. Therefore, the door shaft 13 a is also fixed in the rotational direction with respect to the air conditioning case 12. As a result, the door position can be maintained even when a force is applied in the air conditioning case 12 to rotate the door base plate due to the wind pressure.

  In other words, as shown in FIG. 2, when the clutch plate 26 is displaced by the slide portion 27 and the clutch plate 26 and the pulley 20 are separated from each other, the power transmitted to the pulley 20 is transferred to the clutch plate 26. It is cut off without being transmitted.

  When driving the open / close door 13, the air conditioner ECU energizes the electromagnet 23 corresponding to the switching mechanism 16 of the door shaft 13a to be driven. Then, the electromagnet 23 generates a force repelling the magnetic force of the permanent magnet 33 installed on the clutch plate 26. At this time, since the permanent magnet 33 is repelled by a force stronger than the force pulled by the pull spring 28, the clutch plate 26 is separated from the air conditioning case 12, and the clutch plate 26 is contact-coupled to the pulley-side friction plate 29. As a result, the power from the belt 18 is transmitted to the clutch plate 26 and the door shaft 13a via the pulley 20. In this state, the drive motor 15 is driven to transmit the power to the belt 18 so that the power is transmitted as described above. Thus, the air conditioner ECU can drive the door shaft 13a to be driven.

  In other words, as shown in FIG. 3, when the clutch plate 26 is displaced by the slide portion 27 and the clutch plate 26 and the pulley 20 are in contact, the power transmitted to the pulley 20 is transferred to the clutch plate 26. It is transmitted and becomes a transmission state.

  As described above, the door drive device 11 of the present embodiment includes the belt mechanism 14, the drive motor 15, and the switching mechanism 16. Power from the drive motor 15 is transmitted to the door shaft 13 a of the open / close door 13 by the belt mechanism 14. Therefore, if there is at least one drive motor 15 that drives the belt 18, the plurality of doors 13 can be driven. Further, the transmission mechanism and the cutoff state can be switched for each door shaft 13a by the switching mechanism 16. As a result, the power from the belt 18 can be transmitted only to the door shaft 13a to be angularly displaced. Therefore, even with one drive motor 15, the selected door shaft 13a can be driven. Since the number of drive motors 15 can be reduced in this way, it is not necessary to install the same number of drive motors 15 as the open / close doors 13 as in the prior art, and the installation space for the drive motors 15 can be reduced. Therefore, the vehicle air conditioner 10 can be reduced in size.

  In other words, in the door drive device 11 of this embodiment, the drive motor 15 that has been conventionally installed for each door shaft 13a can be integrated into one by the above-described configuration, and the cost is reduced by reducing the number of parts. Can be realized.

  In addition, by using the belt 18 and the pulley 20, it is possible to eliminate the point that the physique of the actuator is a restriction in designing the position of the door shaft 13a of the vehicle air conditioner 10. Thereby, the design freedom of the position of the door shaft 13a of the vehicle air conditioner 10 can be improved.

  In the present embodiment, the switching mechanism 16 includes a pulley 20, a clutch plate 26, and a slide portion 27. Then, the clutch plate 26 is slid to switch between the transmission state and the cutoff state. By controlling the contact state between the clutch plate 26 and the pulley 20 in this way, the transmission state and the cutoff state can be switched. Therefore, the switching mechanism 16 can be realized with a simple configuration.

  Further, in the present embodiment, the air conditioning case 12 is provided with an electromagnet 23, and the clutch plate 26 is provided with a permanent magnet 33. The slide unit 27 controls the energization state of the electromagnet 23 and changes the relative position by the magnetic force acting between the permanent magnet 33 and the electromagnet 23. Accordingly, the clutch plate 26 can be slid and displaced with a simple configuration using the electromagnet 23. Moreover, the electromagnet 23 and the permanent magnet 33 can be incorporated in each member. Therefore, the installation space of the slide part 27 can be suppressed.

  In the present embodiment, the switching mechanism 16 further includes a tension spring 28 provided between the door shaft 13 a and the clutch plate 26. The tension spring 28 applies an elastic force in a direction in which the clutch plate 26 is separated from the pulley 20. The clutch plate 26 can be fixed to the air conditioning case 12 by the case side friction plate 25 and the elastic force. Therefore, it is possible to prevent the ventilation inside the air conditioning case 12 from leaking outside through the door shaft 13a. Further, it is possible to suppress the door shaft 13a from being displaced by wind pressure or the like.

  In the present embodiment, detection means for detecting the position of the door shaft 13a is provided. As a result, the switching of the ventilation path can be controlled by feeding back the angular position of the open / close door 13 as in the conventional servo motor.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  Although the tensioner 19 is used in the first embodiment described above, the tensioner 19 may not be used. The tensioner 19 is preferably used as appropriate according to the layout of the door shaft 13a of the vehicle air conditioner 10.

  In the first embodiment described above, friction by the clutch plate 26 is used for transmission and interruption of power, but it is not limited to surface contact using frictional force. For example, it may be an engagement such as a spline fitting in which irregularities are fitted.

  In the first embodiment described above, the belt 18 transmits power by frictional force, but is not limited to such a belt 18. The belt 18 may have an uneven shape such as a chain, and may be shaped so as to be fitted to the pulley 20.

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 11 ... Door drive device 12 ... Air conditioning case 13 ... Opening / closing door 13a ... Door shaft 14 ... Belt mechanism 15 ... Drive motor (drive source) 16 ... Switching mechanism 17 ... Drive shaft 18 ... Belt 20 ... Pulley 23 ... Electromagnet 26 ... Clutch plate 27 ... Slide part 28 ... Pull spring (elastic member) 33 ... Permanent magnet

Claims (5)

A door drive device (11) that is provided in the vehicle air conditioner (10) and that drives a plurality of open / close doors (13) that open and close the ventilation path in the air conditioning case (12),
Each of the open / close doors is provided with a door shaft (13a) for supporting the open / close doors so as to be angularly displaced,
A belt mechanism (14) for transmitting power to each door shaft by a belt;
A drive source (15) for powering the belt;
A switching mechanism (16) provided on each door shaft and switching between a transmission state in which the power of the belt mechanism is transmitted to the door shaft and a shut-off state in which the power is not transmitted to the door shaft. A door drive device. The switching mechanism is
A pulley (20) provided for each door shaft, through which power is transmitted by the belt, over both the transmission state and the shut-off state;
A clutch plate (26) provided for each door shaft, connected in the rotational direction of the door shaft, and slidably displaced in the axial direction of the door shaft;
A slide part (27) provided in the air conditioning case for each door shaft and changing a relative position between the pulley and the clutch plate;
When the clutch plate is displaced by the slide portion and the clutch plate and the pulley are in contact with each other, the power transmitted to the pulley is transmitted to the clutch plate to be in the transmission state,
When the clutch plate is displaced by the slide portion and the clutch plate and the pulley are separated from each other, the power transmitted to the pulley is not transmitted to the clutch plate and enters the shut-off state. The door drive device according to claim 1. The air conditioning case is provided with an electromagnet (23),
The clutch plate is provided with a permanent magnet (33),
The door driving device according to claim 2, wherein the slide unit controls a state of energization of the electromagnet, and changes the relative position by a magnetic force acting between the permanent magnet and the electromagnet. The switching mechanism further includes an elastic member (28) provided between the door shaft and the clutch plate,
The elastic member gives an elastic force in a direction of separating the clutch plate from the pulley,
4. The door driving device according to claim 3, wherein when the electromagnet is energized, the electromagnet and the permanent magnet are repelled to contact the clutch plate and the pulley to enter the transmission state.   The door driving device according to any one of claims 1 to 4, further comprising detection means for detecting a rotation angle of each door shaft.

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