JPS6116443Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a link connection structure, and in particular, the invention relates to a link connection structure, and in particular, a water tap that controls the flow of engine cooling water sent to the heater core and an air mix door that adjusts the amount of air flowing into the heater core are linked. The present invention relates to a link connection structure suitable for use in a door opening/closing mechanism of an automobile air conditioner.

Generally, a door opening/closing mechanism of an air conditioner for an automobile is constructed as shown in FIGS. 1 and 2.

In FIG. 1, the air conditioner for an automobile has an intake unit 1, a cooler unit 2, and a heater unit 3. The intake unit 1 has a built-in fan 5 driven by a motor 4, and by the action of this fan 5, the air inside the vehicle flows in from the inside air inlet 6, and the outside air flows into this intake unit from the outside air inlet 7. do. This intake unit 1 is provided with an intake door 8 that rotates between an air circulation port 6 and an outside air inlet 7, and is configured to either circulate inside air or introduce outside air, or take in inside and outside air simultaneously.

The cooler unit 2 into which air from the intake unit 1 flows is connected to an evaporator 10 in a refrigeration cycle (not shown) in which refrigerant circulates through a refrigerant pipe 9.
This evaporator 10 cools the air flowing in from the intake unit 1. The heater unit 13 has a heater core 11 that adds air that has passed through the cooler unit 2, and a conduit 12 for circulating hot water from the engine E is connected to the heater core 11. , a water tap 13 is provided.
An air mix door 14 is installed in front of the heater core 11.
is installed, and by adjusting the opening degree of the air mix door 14, all the air that has passed through the cooler unit 2 can be sent into the passenger compartment via the heater core 11, or directly into the passenger compartment without passing through the heater core 11. Also, part of the air from the cooler unit 2 is passed through the heater core 11, and other air is not allowed to pass through the heater core, and is then mixed and sent into the vehicle interior, or alternatively, it is sent from the upper and lower air outlets without being mixed.

The heater unit 3 includes a differential duct 15 for blowing out air along the inner surface of the windshield.
A floor duct 16 for blowing air out to the feet of the front seats of a car, and a vent duct 17 for sending air to a center ventilator (not shown) assembled to the instrument panel in front of the driver's seat.
Further, within the heater unit 3, a floor door 18 for controlling air distribution between the differential duct 15 and the floor duct 16, and a vent door 19 for controlling air distribution to the vent duct 17 are provided. It is being

In the automobile air conditioner configured as described above, when it is desired to rapidly cool the room, the air mix door 14 is closed to prevent air from flowing to the heater core and to prevent hot water from circulating to the heater core 11.

In this case, the water tap stock 13 and the air mix door 14 are mechanically connected as shown in FIG. 2, and when the air mix door 14 is closed, the water tap stock 13 is also closed, stopping the supply of engine cooling water to the heater core 11 and creating a complete seal. ing. However, when the air mix door 14 is opened,
The water tap 13 is opened according to its opening degree.

That is, one end of the lock opening/closing link 22 is fixed to the rotating shaft 21 of the butterfly valve 20 that constitutes the water tap lock 13, and the free end of this link 22 is rotatably connected to one end of the connecting link 23. Air mix door 1 on the other end
An operating link 2 whose intermediate portion is fixed to the rotation shaft 24 of 4.
By connecting one end of 5 to the rotating body, the water tap 13 and the air mix door 14 are mechanically connected. In addition, in FIG. 2, 26 is a control operation link connected to the other end of the operating link 25.

In connection of such links, a link connection structure as shown in FIG. 3 has conventionally been used. This connection structure is, for example, link 2
Through holes 22a and 23a are respectively formed in the holes 22a and 23, and the links 22 and 23 are brought into contact with each other through the spacer 27.The rivet 28 is inserted through the through holes 22a and 23a and the spacer 27, and the rivet 28 is attached to the washer 29a, 29b, and then
Links 22 and 23 are rotatably connected to each other.

However, such a connection structure has a problem in that the number of parts and the number of assembly steps are large, leading to an increase in manufacturing costs.

Therefore, conventionally, when connecting the above-mentioned links, a link connecting structure as shown in FIG. 4 is sometimes used. In this connection structure, for example, a ring 23b is formed at the connecting end of one link 23, and the ring 23b is attached to the other link 23.
A shaft portion 22 formed in a substantially Z-shape at the connecting end of 2
b is inserted, and the links 22 and 23 are rotatably connected to each other.

However, in such a connection structure, there is a large play between the wheel set and the shaft, which causes problems such as poor accuracy, easy generation of noise, and the risk of disconnection. be.

The present invention was developed by focusing on such conventional problems, and involves preparing a connecting device integrally molded from synthetic resin, and having a pair of holding bodies in this connecting device hold a pair of links, respectively. In addition, it is an object of the present invention to solve the above-mentioned problems by ensuring the rotational displacement between the two holding body parts by means of a hinge member that flexibly connects the two holding body parts to each other.

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 5 to 7 are diagrams showing a case in which an embodiment of the hook link connection structure of the present invention is applied to a connection structure between the lock opening/closing link and the connecting link of a water tuck. First, to explain the configuration, 31
is a connecting tool prepared in the present invention, and this connecting tool 31 is integrally molded from synthetic resin.
This connector 31 has integral holding body parts 32 and 33, and both holding body parts 32 and 33 are attached to the hinge member part 3.
4 are integrally connected. The hinge material part 34 has some flexibility that the synthetic resin itself has,
Therefore, the pair of holding body parts 32 and 33 are connected with each other in such a manner that rotational displacement between them is allowed due to this flexibility. The holding body parts 32 and 33 have cylindrical parts 32a and 33a and rectangular parallelepiped parts 32b and 3.
3b, pivot holes 35, 36 are formed in the centers of the cylindrical parts 32a, 33a, and presser claws 37, 38 are formed in one end surface of the rectangular parallelepiped parts 32b, 33b.
is installed protrudingly. And a pair of holding body parts 3
2 and 33 are arranged on the outer periphery of the cylindrical parts 32a and 33a so that the central axes of the cylindrical parts 32a and 33a are parallel to each other by the hinge member 34, and the rectangular parallelepiped parts 32b and 33b are mutually parallel to each other. The presser claws 37 and 38 are connected to each other in a vertically opposite positional relationship, so that the pivot holes 35 and 36 are parallel to each other.

On the other hand, the lock opening/closing link 22 extending from the rotating shaft 21 of the butterfly valve (not shown in FIG. 5) is integrally formed in the shape of a round bar, and the free end of this link 22 has a connecting shaft. It is formed by bending the portion 42 at a substantially right angle in the longitudinal direction. Further, the connecting link 23 is also formed in the shape of a round bar, and a connecting shaft 43 is similarly formed at the connecting end thereof. These pair of links 22, 23
The shaft portions 42 and 43 are connected to the pivot holes 35 and 3 in the pair of holding body portions 32 and 33 of the connector 31.
6, and the vicinity of the shaft parts 42, 43 is pressed by the presser claws 37, 38 in the inserted state, so that the pair of holding body parts 32, 33
Therefore, both links 22 and 23 are held by both holding body parts 32 and 3.
3 and a hinge member 34 that connects them.

Next, the action will be explained.

When the operating link 25 (see FIG. 2), which is not shown in FIGS. 5 to 7, rotates, the connecting link 2
3 exhibits a substantially linear swinging motion, causing the lock opening/closing link 22 to perform an arcuate motion as shown in FIG. 6 about the pivot shaft 21. At this time, the connecting portion between both links 22 and 23 needs to allow rotational movement. In the link connection structure according to the above configuration, this rotational movement is allowed by the flexibility of the hinge member 34 that connects the pair of holding body parts 32 and 33 holding the links 22 and 23. . That is, as the link 23 swings, the holding body part 33 is also displaced, and the other holding body part 32 is displaced along an arcuate locus centered on the rotation axis 21 of the link 22 via the hinge material part 34. let When one link 23 moves in a direct trajectory and the other link 22 moves in a circular arc trajectory, the holding body part 3
Although the angular relationship between 3 and 32 varies, the hinge member 3
Reference numeral 4 is molded from synthetic resin, and deforms so as to flex to allow the fluctuation, and follows the movement of one link 23 and causes the other link 22 to move in an arc. In order to facilitate the bending deformation of the hinge member 34, it is preferable to form a groove in the hinge member 34 substantially parallel to the rotation axis 21. Further, when the presser claws 37 and 38 are in a state that allows the links 22 and 23 to move slightly, and the pivot holes 35 and 36 and the shaft portions 42 and 43 of the links are formed in a circular shape, is this pivot hole 35,
36 as well, some rotation between the links 22 and 23 is allowed.

In the above embodiment, the link connection structure according to the present invention is applied to the connection between the opening/closing link and the connecting link of the water tuck. The present invention can also be applied to the connecting portions of the links, and also to other link mechanisms. In addition, although the structure for holding the connecting portion of the link in the holding body part has been described as consisting of a pivot hole and a presser pawl, the structure is not limited to this. They may be held together, or both may be heat-sealed. Furthermore, as long as the hinge material itself has flexibility, the connection location and posture of the hinge material with respect to the holder are not limited to the above embodiments, and therefore, the intersecting relationship of the links is two-dimensional. It is not limited to.

As explained above, according to the present invention, the structure is such that the rotational displacement of the links is allowed by the flexibility of the hinge material section that connects the holding body sections that hold the links. It is possible to suppress the movement between the parts, and since the connector is integrally molded, the number of parts is kept to a minimum, reducing assembly man-hours and preventing the generation of noise. be.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of an automotive air conditioner, Figure 2
The figure is a configuration diagram showing a door opening/closing link mechanism of an automobile air conditioner, and Figure 3 is a diagram showing a conventional example.
4 is a perspective view showing another conventional example, FIG. 5 is a perspective view showing an embodiment of the present invention, FIG. 6 is a plan view illustrating its operation, and FIG. 7 FIG. 6 is a sectional view taken along the line of FIG. 13...Water tap, 14...Air mix door, 20...Butterfly valve, 21...Rotation shaft, 2
2... Kotsuku opening/closing link, 23... Connecting link, 25
... Operating link, 31... Connector, 32, 33... Holder section, 34... Hinge material section, 35, 36... Pivot hole,
37, 38... Presser claw, 42, 43... Connection shaft portion.

Claims (1)

[Claims for Utility Model Registration] 1. In a link connection structure that rotatably connects the connecting portions of a pair of links, the link is integrally molded from synthetic resin and holds each of the connecting portions of the pair of links. 1. A connection structure comprising a connector having a pair of holding body parts and a hinge material part that flexibly connects the pair of holding body parts. 2. The holding body part has a pivot hole and a presser pawl, and the shaft portion formed at the connecting portion of the pair of links is inserted into both pivot holes, and the vicinity of the shaft portion of the link is respectively pressed with both presser pawls. The link connection structure according to claim 1 of the utility model registration claim, wherein each link is retained by the user.