JPS6138816Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a motor actuator for an air conditioner, and particularly to a mounting structure for the actuator.

Conventionally, the above motor actuator is shown in FIG.
As shown in Fig. 2, a case 1 consisting of an upper case and a lower case has a motor and an output gear that rotates in conjunction with the motor, and an arm 3 is attached to the output shaft 2 of this output gear. A link 4 is attached to the arm 3, and the end side of the link 4 is connected to a door 6 that controls the amount of air flow A in the duct 5 of the vehicle air conditioner.
As a result, the arm 3 rotates as the motor rotates, causing the link 4 to move linearly, and the air control door 6
The amount of air flow A is controlled thereby. The air control door 6 may be an inside/outside air switching door that guides inside or outside air into the duct 5, an air mix door that adjusts the ratio of warm air to cold air, or a mode setting door that switches between cooler mode, heater mode, and defrost mode. and so on.

The case 1 is fixed to the duct 5 side by screws 8 passing through both the flange portion provided on the upper case and the lower case side.

However, according to the conventional motor actuator for air conditioners, vibration noise is generated from the motor housed in the case 1, the output gear, the reduction gear that interlocks the two, etc. The vibration noise is transmitted to the duct 5 side through the case 1, and the duct 5 amplifies the vibration noise, which is annoying to the occupants of the vehicle equipped with the vehicle air conditioner. Furthermore, according to the above-mentioned conventional motor actuator, when the arm 3 is rotated to the maximum angle and the air control door 6 is opened to the maximum extent and brought into contact with the inner wall side of the duct 5, the Due to the reaction stress acting on the air control door, a force opposite to the direction in which the arm 3 was rotated is transmitted to the link 4 and the arm 3 toward the output gear, and
This force causes a lock between the output gear and the intermediate gear, and between the intermediate gear and the motor gear, and as a result, the motor becomes unable to rotate and there is a risk that the motor may burn out. In this case, if the air control door 6 is made to simply touch the inner wall of the duct 5 without being pressed against it, if the air flow A is supplied with strong pneumatic pressure, the air flow A may partially contain air. A problem arises in that leakage occurs between the contact portion between the control door 6 and the inner wall of the duct 5, making it impossible to perform accurate air conditioning.

The purpose of the present invention is to eliminate the above-mentioned drawbacks by attaching the case to the duct side via a cushion material, and will be described in detail below using examples.

3 to 5 are simplified configuration diagrams showing one embodiment of the motor actuator for an air conditioner according to the present invention, in which the side portion 10 of the duct 5 is
is provided with a hole 11, the shape of which is such that it has a width m along the direction a which imparts a rotational force to the air control door, as shown in FIG.
It is set in a rectangular shape so that the hole 1 is long.
1 is covered with a cushion material 12 such as urethane foam, and a cylindrical collar 13 is fitted into the center of this cushion material 12. A bolt 14 is provided that passes through the inside. This bolt 14 has a flange portion 17 projecting outwardly of the upper case 16 that abuts the outer circumferential side of the lower case 15, and a hole 18 formed on the outer circumferential side of the lower case 15 that this flange portion 17 abuts. It fits into the collar 13 from above through the collar 13, and a nut 1 is attached to the tip of the collar 13.
9 are screwed together, and the lower case 15 and upper case 16 are integrated by the tightening force of this nut 19. As a result, both the lower case 15 and the upper case 16 are connected to the duct 5 through the cushion material 12. It is fixed to the wall part 10 of.

According to the above configuration, since the case consisting of the lower case 15 and the upper case 16 is fixed to the cushion material 12 via the bolts 14, the motor, reduction gear, output gear, etc. stored inside the case are Even if this case vibrates due to the generated vibration noise, this vibration noise is absorbed by the cushion material and is not transmitted to the wall 10 side of the duct 5, so that a part of the duct 5 does not vibrate. It is possible to suppress vibration noise caused by

In addition, since the hole 11 provided in the wall portion 10 is set so that its inner diameter increases in the direction of applying a pressing force to the air control door, the thickness of the cushion material 12 increases when the air control door is pressed. The thickness of the cushion material 12 in this area becomes thicker in the direction where the stress due to the reaction is applied, so the air control door is rotated via the link and its end is pressed into contact with the inner wall of the duct 5. Because the air control door comes into pressure contact with the duct side due to the bending, it is possible to absorb the stress in the opposite direction applied to the output gear via the link. This prevents problems such as motor burnout and the like.

FIG. 6 is a simplified configuration diagram showing another embodiment of the motor actuator for an air conditioner according to the present invention. A cushion material 21 is provided on the flange portion 17 side of the hole, and a cushion material 21 is provided so as to cover the inner surface side and the peripheral edge side of this hole. A tapping screw 23 is provided, and the tapping screw 23 is screwed into a convex portion 24 projecting from the surface side of the wall portion 10 of the duct 5 from the tip direction through the collar 22. Therefore, even with this configuration, since the case consisting of the lower case 15 and the upper case 16 is fixed to the tapping screw 23 side via the cushion material 21, the vibration generated in the case is transmitted to the wall of the duct 5. It is possible to suppress the generation of vibration noise without being transmitted to the part 10 side, and by setting the shape of the hole 20 so that its inner diameter becomes longer in the direction of pressing the air control door, the cushion material 21 can be suppressed. The wall thickness is made thicker in the direction where stress is applied due to the reaction when the air control door is pressed by the motor actuator, so there is an escape in the opposite direction to the direction in which the air control door is pressed through the link on the case side. This makes it possible to absorb the stress due to the reaction applied to the case side via the link by pressing the air control door into contact with the air control door, and prevent the motor from locking due to the stress due to the reaction. Therefore, a protection circuit or a temperature fuse for detecting motor lock can be eliminated, and the number of parts and circuit configuration can be simplified.

In addition, in the present invention, the wall portion 10 of the duct 5
Although the shape of the hole 11 provided on the side and the hole 20 provided in the flange portion 17 has been described as being rectangular in shape, the present invention is not limited to this and may be in an elliptical shape.

As explained above, according to the motor actuator for an air conditioner according to the present invention, a bolt or a tassel is inserted into a part of the wall of a duct having an air control door through a hole provided in the actuator case. In a motor actuator having a shaft-like threaded member such as a pin screw, the outer peripheral side of the shaft-like threaded member such as the bolt or tapping screw and the inner peripheral side of the hole of the case into which this threaded member is fitted. or between the outer circumferential side of the threaded member and the inner circumferential side of the hole provided in the wall of the duct into which this threaded member is inserted, and the wall thickness of the intervening portion of the cushion material is is set so that it increases in the direction in which stress is applied due to the reaction when the air control door installed in the duct is pressed by an arm installed at the end of the output shaft protruding from the motor case. The vibration noise generated in the yuator is prevented from being transmitted to the duct side, thereby preventing the vibration noise from becoming louder, and the motor is locked based on the reaction when the air control door is controlled by the deflection of the cushion material. This problem can be solved.

[Brief explanation of the drawing]

1 and 2 are simplified configuration diagrams showing an example of a conventional motor actuator for an air conditioner, and FIGS. 3 to 5 show an example of the motor actuator for an air conditioner according to the present invention. The sectional view, plan view, and FIG. 6 are sectional views showing other embodiments of the motor actuator for air conditioners according to the present invention. 1...Case, 2...Output shaft, 3...Arm,
5... Duct, 6... Air control door, 10... Wall, 11, 18, 20... Hole, 12, 21... Cushion material, 13, 22... Collar, 14... Bolt, 15... Lower case, 16... Upper case, 2
3...Tatuping Sukuriyu.

Claims (1)

[Scope of utility model registration request] A shaft-shaped threaded member of a bolt or tapping screw that fits into a wall of a duct having an air control door through a hole provided in the motor actuator case to fix the motor actuator case. In the motor actuator for an air conditioner, there is a gap between the outer circumferential surface of the screwing member and the inner circumferential surface of the hole of the motor actuator case into which the screwing member is fitted, or into which the screwing member is fitted. A cushion material is interposed between the inner circumferential surface of the hole in the wall of the duct, and the wall thickness of the intervening portion of the cushion material is determined by the stress caused by the reaction when the air control door is pressed by the motor actuator. A motor actuator for an air conditioner, characterized in that the motor actuator is thicker in the direction of application.