JPS6130885Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an air mix type automobile air conditioner that adjusts the temperature by adjusting the mixing ratio of cold air and warm air, and in particular relates to a link mechanism that controls an air mix damper and a water valve in conjunction with each other. It is.

Conventionally, this type of device uses an air mix damper to direct air sent from an electric blower toward a heater core whose heat source is the cooling water of an automobile engine.
The flow is divided into a flow that bypasses the heater core.
The outlet temperature is adjusted by mixing warm air and cold air at the outlet of the heater core. When the air mix damper is operated to the maximum cold air side, the water valve that opens and closes the hot water circuit of the heater core is closed.

That is, in the conventionally known configuration, the air mix damper and the water valve are controlled in conjunction with each other. Here, if the operating surface of the air mix damper and the operating surface of the water valve lever are on two parallel planes as shown in Figure 1, they will interlock extremely well via the connecting rod or link. I can do it. However, in a case where the two operating surfaces are perpendicular to each other as shown in FIG. 2, it is not easy to interlock them using a link mechanism such as a rod as in the case of two parallel surfaces.

The present invention was devised in view of the above points, and is designed to enable good interlock control even when the operating surface of the lever that opens and closes the water valve and the operating surface of the lever that rotates the air mix damper are not parallel. The purpose is to Therefore, the basic structure of the present invention is to arrange the two levers so that part of their attachment point trajectories are in a straight line, and to attach the connecting shaft so that it can tilt in a direction perpendicular to the operating surface of each lever. Adopt.

An embodiment of the present invention will be described below based on the drawings. FIG. 3 shows a schematic cross-sectional view of an automotive air conditioner. The air inside the vehicle or the air outside the vehicle selectively supplied by the inside/outside air switching box 15 is sent to the evaporator 2 by the electric blower 1, and the air cooled by the evaporator 2 is sent to the evaporator 2 by the air mix damper 3. , wind passing through the heater core 4, and wind passing through the bypass circuit 6. At the outlet of the heater core 4, the cold air and warm air are mixed to obtain the required air temperature. The mixed air is then transferred to each outlet 17, 18, 1 selected by the outlet switching damper 16.
From 9, it blows out into the passenger compartment. In addition, 17 is an upper air outlet that blows cold air toward the occupant's head and thorax, 18 is a defroster air outlet that blows warm air toward the window glass, and 19
is a downward outlet that blows warm air toward the occupant's feet.

Here, the air mix damper 3 and the water valve 5 are interlocked, and when the air mix damper 3 moves to the maximum cooling position (the position indicated by the solid line l in Fig. 3), the water valve 5 also closes. The cooling water of the automobile engine is not allowed to pass through the heater core 4. On the other hand, when the air mix damper 3 moves to the maximum heating position (the position indicated by the broken line m in FIG. 3), the water valve 5 becomes fully open. That is, the air mix damper 3 and the water valve 5 are controlled in conjunction with each other by receiving the movement of a temperature control lever (not shown) provided in the vehicle interior via the operating wire 20.

However, in this example, as shown in FIG.
The actuating surfaces (planes) of the levers 1 and 1 are perpendicular to each other, and the levers 5a and 11 are located at a considerable distance from each other. Therefore, in this example, the water valve lever 5
The rotation stroke A of a is transmitted to the connecting lever 9 via the reciprocating motion B of the connecting shaft 7, the movement C of this lever 9 is transmitted to the connecting rod 12 as a rotation angle D, and this operating angle D is further transmitted to the connecting lever 10. I am telling you.

Therefore, in this example, the rotation stroke A of the water valve lever 5a is caused to move in the direction parallel to the operating surface I (X direction) and in the vertical direction (Y direction) via the connection shaft 7, connection lever 9, and connection rod 12. The information is transmitted to the remote connecting lever 10, and the operating surface (surface) of the connecting lever 10 and the water valve lever 5
It is designed to be parallel to the operating surface (plane) of a.

The operating surface of the connecting lever 10 and the operating surface of the air mix damper lever 11 are perpendicular to each other, and the rotation stroke E of the connection lever 10 is transmitted to the rotation stroke F of the air mix damper lever 11. A connecting shaft 8 is disposed near the intersection line n of both surfaces. That is, when the connecting lever 10 and the air mix damper lever 11 are both at the position m at the maximum cooling position, and when both the levers 10 and 11 are at the position l at the maximum heating position, the connecting shaft 8 is arranged so that it lies on the intersection line n of both sides.

Of course, since the air mix damper lever 11 rotates within the plane, the attachment part 11a of the shaft 8 to the lever 11 is aligned with the intersection line n during the rotation of the lever 11.
On the other hand, since the connecting lever 10 rotates within the plane, the lever 10 of the shaft 8 moves in the middle of the rotation of the lever 10.
The mounting portion 10a of
change position. Therefore, the attachment part 11a of the shaft 8 to the air mix damper lever 11 is loosely connected so that the displacement y can be released, and the attachment part 10a to the coupling lever 10 is loose so that the displacement x can be released. attached.

FIG. 5 is a sectional view showing the attachment part 10a to the connecting lever 10, and as shown in FIG.
It is made of iron wire with a diameter of about 3 mm, and the tip is clamped. In addition, the mounting hole 1 of the lever 10
A resin-made locking tool 13 (shown in FIG. 6) is fitted into 0b. To attach the shaft 8 to the lever 10, first, the locking tool 13 is inserted into the mounting hole 10b using the elasticity of the resin, and then the crank part 8a of the shaft 8 is inserted into the center hole of the locking tool 13. 13
a, then insert the shaft 8 into the locking tool 1.
This is done by fitting it into the holding part 13b of No. 3. Since the locking tool 13 is prevented from coming off from the lever 10 by the locking claw portion 13c, a minute gap is not formed between the inner surface of the mounting hole 10b and the circumferential surface 13d of the locking tool 13. The small gap allows the shaft 8 to move by x.

Although FIG. 5 shows the attachment portion 10a between the connection shaft 8 and the connection lever 10, the attachment portion 1a between the connection shaft 8 and the air mix damper lever 11 also has the same structure.

As is clear from the above explanation, in this example, when the occupant moves the temperature control lever inside the vehicle, the air mix damper lever 1 is activated via the operating wire 20.
The displacement is transmitted to the air mix damper 1, thereby making it possible to control the opening degree of the air mix damper 3. The rotation F of the air mix damper lever 11 is transmitted via the coupling shaft 8 to the coupling lever 10 whose operating surface is shifted by 90 degrees, and then via the coupling rod 12, the coupling lever 9, and the coupling shaft 7. The signal is transmitted to the water valve lever 5a, thereby simultaneously controlling the opening and closing of the water valve.

In the above-mentioned embodiment, since the operating surfaces of the water valve lever 5a and the air mix damper lever 11 did not intersect, both levers 5a, 1
Although the link mechanisms 7, 9, 12, and 10 are interposed between the water valve lever 5a and the air mix damper lever 11, if the operating surface of the water valve lever 5a intersects with the operating surface of the air mix damper lever 11, in other words, the water valve lever 5a It is also possible to directly connect the air mix damper lever 11 and the water valve lever 5a via the connecting shaft 8 when the connecting lever 10 is in the position of the connecting lever 10 shown in FIG.

Furthermore, although iron wire is used as the connecting shaft 8 in the above example, other materials that have a certain degree of rigidity and can be distorted may also be used, such as piano wire, spring steel, or resin plate. When using a material that has rigidity and can be distorted for the connecting shaft 8 in this way, a fastening material 14 as shown in FIG. 8 can also be inserted and fixed by tightening with screws or the like.

Furthermore, in the above example, the line connecting the maximum heating position l and the maximum cooling position m of the mounting portion 11a of the air mix damper lever 11 and the lever that opens and closes the water valve 5 (the connecting lever 10 or the water valve lever 5a) The line connecting the maximum heating position l and the maximum cooling position m of the mounting part 10a of the
However, the intersection line n does not necessarily have to be the line connecting the maximum heating position l and the maximum cooling position m;
Any line may be used as long as it includes two points on the trajectories a and 10a. (See Figure 8.) However, since the position where the connecting shaft 8 is located on the intersection line n can best hold the load applied to the levers 10 and 11, there are points where a large load is applied to the levers 10 and 11, for example, at a water valve. It is desirable that the connecting shaft 8 be placed on the intersection line n at the point l where the shaft 5 is fully closed.

As explained above, in the present invention, a line connecting two points on the locus of the air mix damper lever mounting part and a line connecting two points on the locus of the mounting part of the lever that opens and closes the water valve. Connect the air mix damper lever mounting part and the water valve opening/closing lever mounting part with a connecting shaft, aligning the line with the intersection line of the operating surfaces of both levers, and connect the connecting shaft and both lever mounting parts. The two levers are connected in such a way as to allow minute fluctuations, so even if the operating surface of the air mix damper lever is not parallel to the operating surface of the lever that opens and closes the water valve, the motion of both levers can be well controlled. Has excellent effects.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams showing the relationship between operating surfaces;
Figure 3 is a sectional view showing one embodiment of the device of the present invention, and Figure 4 is the air mix damper lever shown in Figure 3.
FIG. 5 is a sectional view showing the lever mounting part shown in FIG. 4, FIG. 6 is a perspective view showing the locking device shown in FIG. 5, and FIG. FIG. 8 is a cross-sectional view showing another example of the lever mounting portion according to the present invention, and a perspective view showing another example of the coupling mechanism between levers according to the present invention. 3... Air mix damper, 4... Heater core, 5... Water valve, 8... Connection shaft, 10... Connection lever, 11... Air mix damper lever.

Claims (1)

[Scope of utility model registration request] A heater core that heats air using engine cooling water as a heat source, an air mix damper that controls the ratio of air passing through this heater core to air that bypasses the heater core, and opening/closing control of a passage that guides engine cooling water to the heater core. In the automotive heater device equipped with a water valve, two points on the locus of the lever that rotates the air mix damper.
Match the line connecting the points with the line connecting the two points on the trajectory of the lever that opens and closes the water valve.
A connecting shaft connecting both levers is disposed on this line, and this connecting shaft and both levers are supported so as to be rotatable and allow minute fluctuations in a direction perpendicular to the direction of rotation. An automotive heater device with a non-parallel operating surface.