JPH0487827A - Door driving device for air-conditioning device for vehicle - Google Patents

Abstract

PURPOSE:To contain the whole of a drive means in a casing and to reduce a mounting space for an air-conditioning device for a vehicle by disposing a motor for rotating a support shaft in the support shaft rotatably supported in the casing to drive a door. CONSTITUTION:The degrees of the openings of a ventilation discharge port, a defrost discharge port, and a heat discharge port are regulated by means of a film damper (door) 3 moved in a casing 2, and a plurality of opening parts 32 to selectively open respective discharge ports are provided. In a device wherein the film damper 3 is rotated by means of a drive device 4, the drive device 4 comprises a drive shaft 5, an electric motor 6, a driven shaft 41, a drive belt 42, and an idle shaft 43. The drive shaft 5 rotatably disposed between first and second caps 7 and 8 is provided at the interior with the electric motor 6, a rubber 53, and a shaft hole 55 for containing a tension spring 54. Through rotation of the drive shaft 5 along with running of the motor 6, the film damper is wound.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a door drive device for a vehicle air conditioner.

Conventional technology] Conventionally, in a vehicle air conditioner, a casing having a plurality of air outlets that blows air into a vehicle interior, a plurality of plate dampers that open and close the air outlets, and a drive device that rotationally drives the plate damper. It is equipped with

This drive device consists of a shaft that fixes the end of the plate damper,
The lever is fixed to the end of the shaft and includes an actuator that rotationally drives the lever.

In a vehicle air conditioner, a link mechanism is often interposed between a lever and an actuator due to constraints on vehicle mounting.

Note that the lever, actuator, and link mechanism are assembled on the outside of the casing.

[Problems to be Solved by the Invention] However, in conventional vehicle air conditioners, drive devices such as levers, actuators, link mechanisms, etc. are assembled on the outside of the casing, so the mounting space for the air conditioner is large. There was a problem that it became.

An object of the present invention is to provide a door drive device for a vehicle air conditioner that can reduce the installation space.

[Means for Solving the Problems] A door driving device for a vehicle air conditioner according to the present invention includes a casing having an air passage through which air passes, a door that adjusts the degree of opening of the air passage, and a door driving device for driving the door. a cylindrical support shaft having an axial hole therein, the door being fixed to the outer periphery, and rotatably supported within the casing; and the casing A technical means was adopted, which includes an output shaft fixed to the shaft, and a motor fitted into the shaft hole and held by the support shaft.

[Function] When the output shaft of the motor attempts to rotate, the motor itself rotates in the opposite direction to the rotation direction of the output shaft because the output shaft is fixed to the casing. At this time, since the motor is fitted into the shaft hole and held by the cylindrical support shaft, this support shaft also rotates together with the motor. Therefore, the door fixed to the outer periphery of the support shaft is driven in the rotational direction of the motor.

[Effects of the Invention] Since the motor for rotating the support shaft is disposed within the support shaft that is rotatably supported within the casing and drives the door, the entire driving means is housed within the casing. As a result, the mounting space for the vehicle air conditioner can be reduced.

[Example] A door drive device for a vehicle air conditioner according to the present invention will be described based on an example shown in FIGS. 1 to 11.

1 to 3 show a first embodiment of the present invention. 1st
2 and 2 show a drive device, and FIG. 3 shows a door drive device for a vehicle air conditioner.

A vehicle air conditioner 1 includes a blower 1 in a casing 2.
1. It houses an evaporator 12 and a heater core 13.

The blower 11 generates an air flow inside the casing 2 toward the interior of the vehicle.

The evaporator 12 is a part of the refrigeration cycle, and cools the air by exchanging heat between the air passing through the casing 2 and the refrigerant flowing inside.

The heater core 13 is supplied with engine cooling water warmed within the engine cooling water jacket, and heats the air by exchanging heat between the cooling water and the air passing therethrough. Further, on the passage on the upstream side of the heater core 13, the amount of air passing through the heater core 13 and the amount of air passing through the heater core 13 are shown.
An air mix damper 14 is provided to adjust the ratio between the amount of air bypassed and the amount of air bypassed.

Furthermore, the casing 2 has a ventilation outlet 21
, side ventilation outlet 22, defroster outlet 23, heat outlet 24, front heat outlet 25
, a rear heat outlet 26 and a cold air bypass 27.

The ventilation outlet 21 is an air passage according to the present invention, and blows out an air flow toward the upper body of the vehicle occupant.

The side ventilation outlet 22 blows out an air flow toward the side window of the automobile and the body of the vehicle occupant on the side window. The defroster outlet 23 is an air passage according to the present invention, and blows out an air flow to the front windshield of the automobile. The heat outlet 24 is an air passage of the present invention, and the front heat outlet 25 guides warm air to the front heat outlet 25 and the rear heat outlet 26.
Blows out a stream of air toward the feet of vehicle occupants. The rear heat outlet 26 blows out air toward the rear seats of the automobile. The cold air bypass 27 is a passage that directly guides the cold air blown out from the evaporator 12 to the ventilation outlet 21 and the side ventilation outlet 22.
It is opened and closed by the switching damper 28.

The degree of opening of the ventilation outlet 21, the defroster outlet 23, and the heat outlet 24 is adjusted by a film damper 3 that moves within the casing 2 while facing them.

This film damper 3 is a door of the present invention, and is made of, for example, visible polyethylene resin, and both ends thereof are connected to the drive device 4. Also, film damper 3
The middle portion of the air conditioner is stretched around a plurality of support shafts 31 rotatably supported by the casing 2, and has a plurality of openings 32 for selectively opening each outlet.

The drive device 4 includes a drive shaft 5, an electric motor 6, a driven shaft 41, a drive belt 42, and an idle shaft 4.
It has 3.

The drive shaft 5 is a support shaft of the present invention, and is rotatably disposed between the first cap 7 and the second cap 8. The drive shaft 5 is made of resin such as ABS resin or polypropylene resin, and has an axial hole 55 in which the electric motor 6, rubber 53, and tension spring 54 are housed. When the drive shaft 5 rotates to the left in the figure, one end of the film damper 3 is wound up. Further, a film damper 3 is provided on the outer periphery of the drive shaft 5.
A mounting bracket 56 and a plurality of protrusions 57 that fix one end of the
is installed. The mounting bracket 56 holds one end of the film damper 3 against the outer periphery of the drive shaft 5 by engaging hook-shaped protrusions 58 protruding from the outer periphery of the drive shaft 5 at both ends thereof.

A plurality of holes 33 formed at one end of the film damper 3 are fitted into the plurality of projections 57 .

The rubber 53 is made of synthetic rubber, and serves to securely hold the electric motor 6 within the drive shaft 5 and to provide vibration and soundproofing for the electric motor 6.

One end of the tension spring 54 is supported by the electric motor, and the other end is supported by the second cap 8. This tension spring 54 applies a tensile force (for example, 0.3 to 0.4 k) to the film damper 3 so that the drive shaft 5 always pulls the film damper 3 in the tension direction.
g). Therefore, the film damper 3 does not loosen when moving inside the casing 2.

The electric motor 6 is a motor of the present invention, and a DC motor, a stepping motor, or the like is used.

The output shaft 61 of the electric motor 6 is decelerated to a predetermined rotational speed by the presence of a planetary gear reduction mechanism 62 disposed coaxially with the electric motor 6. This output shaft 61 is fixed to the second cap 8 via a tension spring 54. The electric motor 6 also has two terminals 63 and 64 protruding from the left end in the figure.

The first cap 7 is made of polypropylene resin, and is fixed by being fitted into the casing 2 with one touch into a hole 29 formed in the casing 2. This first cap 7 is
It has a plurality of locking pins 10 that lock onto the casing 2.

The first cap 7 also has two terminals 71.72 and an annular contact 73.7 for supplying power to the electric motor 6.
4 is insert molded. Contacts 73, 74 are permanently connected to terminals 63, 64 of electric motor 6.

The second cap 8 is made of polypropylene resin, and is fixed by being fitted into the casing 2 with one touch into a hole 29 formed in the casing 2. This second cap 8 is
It has a plurality of locking pins 80 that lock onto the casing 2.

The driven shaft 41 is rotatably supported by the casing 2, and the other end of the film damper 3 is fixed in the same way as the drive shaft 5. When the driven shaft 41 rotates clockwise in the figure, the other end of the film damper 3 is wound up. The drive belt 42 transmits the power of the drive shaft 5 to the driven shaft 41. Idle shaft 4
3 is rotatably supported by the casing 2 and stabilizes the tension of the drive belt 42.

The operation of the drive device 4 of this embodiment will be explained based on FIGS. 1 to 3.

When the electric motor 6 is energized, the output shaft 61 is decelerated by the planetary gear reduction mechanism 62 and rotates slowly. As the output shaft 61 rotates, the tension spring 54 is wound around the outer periphery of the output shaft 61. Then, when the tension spring 54 is wound to a certain extent, the output shaft 61 is fixed to the second cap 8. Note that since the electric motor 6 is fixed to the drive shaft 5 by the rubber 53, the electric motor 6 rotates slowly in the opposite direction to the output shaft 61 together with the drive shaft 5. Therefore, one end portion of the film damper 3 is wound around the outer periphery of the drive shaft 5. At this time, due to the rotation of the drive shaft 5, the driven shaft 41 also rotates in the same direction as the drive shaft 5 via the drive belt 42, and the film damper 3 is sent out in the direction of the drive shaft 5.

Therefore, the film damper 3 moves while facing the air outlet. Then, when the opening 32 of the film damper 3 and the desired air outlet match, the electric motor 6 is de-energized, thereby blowing cold or warm air toward the vehicle interior from the desired air outlet.

In this way, since the entire drive device 4 for moving the film damper 3 within the casing 2 while facing the air outlet is housed within the casing 2, no link mechanism, actuator, etc. are disposed outside the casing 2. Therefore, the mounting space for the vehicle air conditioner 1 can be reduced compared to conventional air conditioners.

FIG. 4 shows a second embodiment of the present invention, and shows a driving device.

This drive device 4 has a potentiometer 91 installed between the electric motor 6 and the first cap 7.

The rotational position of the electric motor 6 can be detected by this potentiometer 91, and the accuracy of the stopping position of the film damper 3 can be improved.

For this reason, the opening 32 of the film damper 3 will not deviate from the desired outlet and stop, so that a predetermined amount of airflow is blown out from the outlet.

Note that the first cap 7 is a 3rd cap for the potentiometer 91.
One terminal 75 and two terminals 76 for power supply are insert molded.

5 to 8 show a third embodiment of the present invention, in which FIG. 5 shows a drive device, and FIG. 6 shows main parts of a door drive device for a vehicle air conditioner.

In this drive device 4, a rubber 92 made of synthetic rubber is substituted for the tension spring 54 of the first embodiment, and a potentiometer 93 is provided on the second cap 8 side. Also,
As shown in FIGS. 7 and 8, the drive device 4 has a drive shaft 5 and an electric motor 6 disposed at both ends of the film damper 3, respectively.

In addition, the second cap 8 is a 3rd cap for the potentiometer 93.
Two terminals 81 are insert molded.

Further, in this embodiment, a film damper 30 is used as the air mix damper, and drive shafts 5 are disposed at both ends of the film damper 30.

9 to 11 show a fourth embodiment of the present invention, in which FIGS. 9 and 10 show the drive device, and FIG. 11 shows the second cap.

This drive device 4 has an electric motor 6 and a planetary gear reduction mechanism 62 arranged on the right side of the shaft hole 55 of the drive shaft 5 in the drawing.

Further, the tip of the output shaft 61 is directly attached to a hard rubber member 94 that is insert-molded or baked into the second cap 8.
Fixed. Furthermore, the terminal 63 of the electric motor 6.
64 and the contacts 73 and 74 of the first cap 1 are connected by:
A pre-twisted wire harness 95,96 is used. Note that the hard rubber member 94 has a half-moon-shaped hole 97 that locks the tip of the output shaft 61.

(Modification) In this embodiment, a film damper is used as the door, but a plate damper may be used as the door.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention.
2 is a sectional view showing the drive device, FIG. 2 is a side view showing the drive device, and FIG. 3 is a schematic diagram showing the door drive device of a vehicle air conditioner. FIG. 4 shows a second embodiment of the present invention, and is a sectional view showing a driving device. 5 to 8 show a third embodiment of the present invention. Fifth
The figure is a cross-sectional view showing the drive device, FIG. 6 is a schematic diagram showing the door drive device of the vehicle air conditioner, FIG. 7 is a cross-sectional view showing the main parts of the door drive device of the vehicle air conditioner, and FIG. The figure is a sectional view showing a film damper. 9 to 11 show a fourth embodiment of the present invention. FIG. 9 is a sectional view showing the driving device, FIG. 10 is a side view showing the driving device, and FIG. 11 is a front view showing the second cap. In the diagram 1...Vehicle air conditioner 2...Casing 3
...Film damper (door) 4...Drive device (
Drive means) 5... Drive shaft (support shaft) 6
...Electric motor (motor) 21...Ventilation outlet (air passage) 23...Defroster outlet (air passage) 24...Heat outlet (air passage)

Claims (1)

[Claims] 1) A casing having an air passage through which air passes, a door for adjusting the degree of opening of the air passage, and a drive means for driving the door, the drive means having a shaft inside. a cylindrical support shaft rotatably supported within the casing, and an output shaft that is fixed to the casing and is fitted into the shaft hole. 1. A door drive device for a vehicle air conditioner, comprising: a motor held by the support shaft.