JPS59143714A - Damper driving device - Google Patents

Abstract

PURPOSE:To prevent a shaft from projecting as well as to make an assembling job easy and sure, by making up a driving arm, which is installed in position between an eccentric point on top of a gear inside a case and a driving load spot, so as to rock in centering on a rocking shaft inside the case. CONSTITUTION:When a motor 4 is driven by a damper on-off signal, a gear 8 rotates in a state of deceleration via each of gears 5 and 6. With the rotation of the gear 8, a pin 81 moves in circular form centering on a shaft 9. Therefore, a driving arm 10 conforms to the movement of the pin 8 and a shaft 7 gets sliding inside a long hole 101 whereby the driving arm 10 rocks within a specified angle range A centering on the shaft 7. Accordingly, a damper is opened or closed via an unillustrated driven arm coupled with the driving arm 10 by means of pin connection 30. With suchlike constitution, assembling the driving arm and the shaft can be easily and surely performed without shaft projection.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a damper drive device that opens and closes a damper provided in an air conditioning duct of a vehicle.

Conventionally, this type of device has an output shaft 2 which is connected to an output shaft 2 from a device case 1 that houses a drive motor and a speed reduction mechanism, as shown in Fig. 1.
A driving arm 3 is provided on the shaft 2 so as to rotate integrally therewith, and the tamper is opened and closed by an opening/closing mechanism (not shown) connected to the arm 3.

By the way, since this type of device is usually installed in a very limited space, the protruding output shaft 2 increases the overall size of the device, which is a major problem and prevents effective use of space. there were.

Further, although screws or the like are normally used to connect the shaft 2 and the driving arm 3, tightening the screws is time-consuming and there is a problem that the screws loosen due to vibration or the like.

In view of the above-mentioned problems of the conventional device, the present invention provides a damper drive device that is small in size, in which the shaft cannot protrude outside the case 1, and that is easy to damage and reliable. That is, the damper drive device of the present invention has a disc-shaped gear connected to a drive motor via a reduction mechanism installed in a case, and the gear has a rotating shaft. A bottle is protruded eccentrically from the bottle, and one end of a drive arm is pivotally connected to the bottle, and the other end of the arm is swingably protruded from an opening provided in a side wall of the case, and the other end outside the case is pivoted. The arm is connected to a driving load, and the arm has a long length between both ends, through which a shaft installed upright in the case is inserted, so that the arm swings about the shaft. .

The present invention will be explained below with reference to illustrated embodiments.

In FIGS. 2 and 3, a drive motor 4 is housed within the device case 1. As shown in FIGS. A worm gear 5 is attached to the drive shaft of the motor 4, and the worm gear 5 meshes with an m wheel 6. The center of the gear 6 is fitted and fixed to a shaft 7 whose both ends are rotatably directed to the case wall, and consists of a large diameter part 61 and a small diameter part 62. Large diameter part 61 and small diameter part 6
A tooth-shaped portion is formed on the outer periphery of the worm tooth,
The wheel 5 meshes with the large diameter portion 61. A disc-shaped gear 8 having a toothed portion formed on the outer periphery meshes with the small diameter portion 62, and the center of the gear 8 is fitted and fixed to a shaft 9 whose both ends are rotatably supported by the case wall. .

A pin 81 is erected on the upper plate surface of the gear 8 at a position eccentric to the shaft 9, and its tip is inserted through an opening 11 formed in the case wall. The opening 11 has an arc shape centered on the shaft 9 along the movement path of the bottle 81 as the gear 8 rotates.

On the other hand, above the gear 6, there is a drive arm 1 between it and the case wall.
There are 0 and C. An elongated hole 101 having a width slightly wider than the diameter of the shaft 7 is provided in the arm 10 in the longitudinal direction, and the shaft 7 is inserted through this elongated hole 101. This allows the arm 10 to swing around the shaft 7 and to move in the left and right directions in the figure.

The arm 10 also has a handling hole 102 at one end thereof, into which a pin 81 is inserted and connected to the gear 8. The other end of the arm 10 is inserted through a through hole 12 in the side wall of the case 1 to protrude outside the case.
03 is provided toward the small side, and one end of a driven arm 13 connected to a damper opening/closing mechanism (not shown) is engaged with this.

The operation of the damper drive device having the above structure will be explained below.

When the motor 4 is driven by the damper opening/closing signal,
Its rotation is decelerated by the gear 5.6.8, and as the gear 8 rotates, the bin 81 vertically installed on the shaft 9
Move along an arc-shaped path centered on . The other end of the driving arm 10, one end of which is locked to the bin 81, swings within a predetermined angular range A around the shaft 7 in accordance with the movement of the bin 81. As a result, the driven arm 13, which is locked to the pin 103 provided at the other end of the drive arm 10, is actuated, and the damper is fully opened at one swing end of the arm 10, and the damper is fully opened at the other swing end. will be closed.

As described above, in the drive device of the present invention, the drive arm 10 is swingably fitted to the shaft 7 erected in the case 1 through the elongated hole 101 provided therein, and one end of the arm 10 is inserted into the case 1. The structure is such that the arm 10 is locked to the pin 81 of the gear 8 provided, and the other end of the arm 10 is made to protrude from the side wall of the device case 1 and swing within a predetermined angular range A as the gear 8 rotates. Unlike conventional devices, the output shaft does not protrude outside the case 1, making the entire device compact.

In addition, the arm 10 is assembled using a punch hole 101 provided therein.
．． It is only necessary to insert the shaft 7 and the bottle 81 through the shafts 102, respectively, 1, which is extremely simple.

Furthermore, unlike when using screws, the attachment does not come loose with just one movement.

As described above, the damper drive device of the present invention reliably supports the drive arm within the device coos, thereby realizing a compact and highly reliable drive device.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional device, Fig. 2 is a sectional view showing an embodiment of the device of the present invention, and Fig. 3 is a -
■It is a line sectional view. 1...Device case 4...Drive motor 7...Shaft 8...Gear 81.103...Pin 101...・Elongated hole diagram 1

Claims (1)

[Claims] A disc-shaped gear connected to a drive motor via a speed reduction mechanism is installed in the case, and a pin is provided on the gear protruding eccentrically from its rotation axis, and one end of the drive arm is attached to the pin. is pivotally mounted, and the other end of the arm is swingably protruded from an opening provided in the side wall of the case, and the other end outside the case is connected to a driving load, and the arm has an elongated hole between both ends. A damper drive device is provided with a shaft, and a shaft installed upright in a case is inserted into the elongated hole so as to swing around the shaft.