JPH0538963Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an air conditioner for an automobile that distributes the temperature and air volume of air blown into a vehicle interior.

(Prior Art) In recent years, automotive air conditioners have used motor actuators as drive sources for opening and closing dampers in ventilation passages, and the force generated by the motor actuators is transferred through link mechanisms. Therefore, it is becoming more and more common to apply this to an air mix damper to operate the air mix damper.

(Problems to be Solved by the Invention) However, the nodes of the link mechanism always require clearance, and the occurrence of backlash is unavoidable.
Due to the backlash, the displacement of the motor actuator lever is not smoothly transmitted to the air mix damper, resulting in a disadvantage that the air blowing temperature fluctuates rapidly.

In view of the above-mentioned conventional drawbacks, the present invention provides a structure in which force generated by a motor actuator is applied to an air mix damper via a link mechanism to rotate the air mix damper. To provide an air conditioner for an automobile in which the air mix damper does not undergo sudden displacement even when there is play, and the air mix damper always rotates smoothly.

(Means for Solving the Problems) According to the present invention, the first air mix lever 2 rotates the air mix damper 1 that switches the ventilation path of the automobile air conditioner and controls the air volume distribution or the blowout temperature. , a link 16 attached to one end of the rotating shaft of the air mix damper and locked to the motor actuator lever 7 controls the rotational movement of the motor actuator lever, one end of which is fixed to the link. The other end of the rod is slidably connected to the first air mix lever via the first elastic body 4 fitted around the rod. A second air mix lever 3 is attached to the other end of the rotating shaft of the air mix damper, and the second elastic body 5 is attached to the air mix damper so that a force in the opposite direction to that of the first elastic body is applied to the air mix damper. An air conditioner for an automobile is obtained, which is characterized in that it is attached to the second air mix lever.

(Function) According to the present invention having the above configuration, the reciprocating motion applied from the motor actuator lever to the rod via the link is transmitted to the first air limit via the first elastic body fitted around the rod. A second elastic body 5 is applied to the air mix damper so that a force in a direction opposite to that of the first elastic body is applied to the air mix damper.
Even if the amount of movement of the rod changes due to play in the link mechanism, the action of the first elastic body and the second elastic body absorbs the change and reduces the play of the air mix damper. It is possible to prevent sticking and ensure smooth rotation of the air mix damper. Furthermore, even if the air mix damper is shaken by the wind, this is also absorbed by both elastic bodies, so it does not affect the link mechanism. As a result, it is possible to prevent the opening degree of the air mix damper from changing due to play in the link mechanism.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an automotive air conditioning system according to one embodiment of the present invention.

In FIG. 1, 12 is a ventilation circuit, 10 is an inside/outside air switching damper, 11 is a blower motor, 9 is an evaporator, 8 is a heater core, 13 to 15 are air outlets, 2
3 is the first air mix lever, 3 is the second air mix lever, 4 is the first elastic body, 5 is the second elastic body, 6
is a rod, 7 is a motor actuator lever, and 17 is a motor actuator.

FIG. 2 shows the main parts of the automobile air conditioner shown in FIG. 1, and 16 is a link.

According to this embodiment, when the motor actuator lever 7 is moved by the motor actuator 17, the movement is caused by the link 16, the rod 6, the first elastic body 4, the first air mix lever 2,
This is then transmitted to air mix damper 1. In response to this movement, the second elastic body 5 (which has an elastic modulus smaller than that of the first elastic body 4) attached to the second air mix lever 3 generates a reaction force. Therefore, when force is applied from the motor actuator lever 7 to the first air mix lever 2,
Even if there is play due to the clearance at each node, the air mix damper does not fluctuate rapidly and
The fluctuations are absorbed by two elastic bodies.

It is now assumed that the rod 6 is moved in a direction that pushes the first air mix lever 2 (direction A). In this case, the first elastic body 4 is compressed, and its compression reaction force acts on the first air mix lever 2, and this compression reaction force rotates the air mix damper 1 (this rotation direction is also A). (We will call it the direction.) On the other hand, due to the rotation of the air mix damper 1, the second elastic body 5 increases the reaction force in the direction opposite to the A direction. Therefore, the reaction forces of both elastic bodies are balanced. Furthermore, when the rod 6 is moved in the direction of pushing the first air mix lever 2,
The first elastic body 4 is further compressed and its compression reaction force increases, causing the aforementioned balance to collapse and further rotating the air mix damper 1 in the A direction. This results in
The second elastic body 5 further increases the reaction force in the direction opposite to the direction A, and the reaction forces of both elastic bodies are balanced again. In this way, as the rod 6 moves in the A direction, the reaction forces of both elastic bodies increase, and the air mix damper 1 is rotated in the A direction while being balanced. At this time, even if there is a sudden change in the amount of movement of the rod 6 due to rattling in the link mechanism, it will be absorbed by the first elastic body 4 that is in balance with the second elastic body 5, and the rotation of the air mix damper 1 will be No sudden changes in angle occur. In this way, smooth operation of the air mix damper 1 can be obtained.

Conversely, the direction in which the rod 6 pulls the first air mix lever 2 (the direction opposite to the A direction is referred to as the B direction).
When the first elastic body 4 is moved, the first elastic body 4 is released from compression, and its compression reaction force is reduced. As a result, the air mix damper 1 rotates in the B direction, which is opposite to the A direction, due to the reaction force of the second elastic body 5 in the direction opposite to the A direction (that is, in the B direction). As a result, the reaction forces of both elastic bodies are balanced.
In this way, as the rod 6 moves in the B direction, the reaction forces of both elastic bodies are reduced and the air mix damper 1 is rotated in the B direction while being balanced. Even in this case, even if there is a sudden change in the amount of movement of the rod 6 due to looseness in the link mechanism, it will be absorbed by the first elastic body 4 which is in balance with the second elastic body 5, and the rotation of the air mix damper 1 will be absorbed. No sudden changes in the angle of movement occur. In this way, smooth operation of the air mix damper 1 can be obtained.

When the air mix damper 1 rotates or when it is stopped after opening at a certain angle, even if the air mix damper 1 tries to swing in either direction due to the influence of the wind, both elastic bodies 4 and 5 Since the reaction force is unbalanced and a force is generated in a direction that prevents the shaking, shaking can be prevented and the link mechanism will not be affected.

Incidentally, the second elastic body 5 may have an elastic modulus that is the same as or larger than that of the first elastic body 4.

(Effects of the invention) As explained above, the present invention uses two elastic bodies in an air mix damper driven via a link mechanism, so that even if there is play in the link mechanism, the air mix damper This has the effect of allowing the to rotate smoothly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an air conditioner for an automobile according to an embodiment of the present invention, and FIG. 2 is a perspective view of a main part of the air conditioner for an automobile shown in FIG. 1... Air mix damper, 2... First air mix lever, 3... Second air mix lever,
4...First elastic body, 5...Second elastic body, 6...Rod, 7...Motor actuator lever,
8... Heater core, 9... Evaporator, 10... Inside/outside air switching damper, 11... Blower motor, 12...
... Ventilation circuit, 13, 14, and 15... Air outlet,
16...link, 17...motor actuator.

Claims (1)

[Scope of utility model registration request] A first air mix lever 2 that rotates an air mix damper 1 that switches the ventilation path of an automotive air conditioner and controls air volume distribution or blowout temperature.
is attached to one end of the rotating shaft of the air mix damper, and the rotational movement of the motor actuator lever is controlled by a link 16 that is fixed to the motor actuator lever 7, one end of which is fixed to the link. the other end of the rod is slidably connected to the first air mix lever via a first elastic body fitted around the rod; A second air mix lever 3 is attached to the other end of the rotating shaft of the air mix damper, and the second elastic body 5 is attached to the air mix damper so that a force in the opposite direction to that of the first elastic body is applied to the air mix damper. An air conditioner for an automobile, characterized in that it is attached to a second air mix lever.