JPH10250349A - Link mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a time from the electrification to a motor upto the movement start of a driven member to a necessary minimum, in a link mechanism for transmitting the drive force of the output shaft of a servo motor 180 deg. rotated by an electrification, once stopped, 180 deg. rotated in the same direction by a re-electrification and stopped to the driven member. SOLUTION: In this link mechanism, when the engage pin 71 of a second link member 7 connected first/second transmission grooves 611, 612 of the guide groove 61 of a first link member 6 connected to an inner/outer air switch door 4 through a third link member 5 to an output shaft 82 is moved, the door 4 is moved between an inner air port block position and an outer air port block position. The first/second target stop positions J, K of the engage pin 71 after the engage pin 71 moves the first/second transmission grooves 611, 612 are set to this side of an engage pin movement direction by a necessary minimum range D in which an overrun can be absorbed than the first/second transmission grooves 611, 612 out of the first/second idle grooves 610a, 610b of the guide groove 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to 180
Rotate once and stop once, and then re-energize to transmit the driving force of the output shaft of the servo motor that rotates 180 ° in the same direction and stop to the driven member, and the driven member is moved to the first predetermined position. And a link mechanism for selectively moving to a position and a second predetermined position.

[0002]

2. Description of the Related Art Conventionally, as the above link mechanism, as shown in FIG. 5 (a), an inside air inlet 2 and an outside air inlet 3 formed in an air conditioning case 1 of a vehicle air conditioner.
Is applied to an inside / outside air switching door that selectively closes a door. Specifically, the first having a guide groove 61 of a predetermined shape
A link member 6 is rotatably provided on a shaft portion 11 integral with the case 1, and a second link member 7 having an engagement pin 71 slidably engaged in the guide groove 61 is connected to a servo motor 8. Are connected to the output shaft 82. Further, a third link member 5 having a guide groove 51 of a predetermined shape is provided on the shaft portion 40 of the inside / outside air switching door 4, and the guide groove 51 of the third link member 5 is provided with an engaging pin of the first link member 6. 62 are slidably engaged.

The guide groove 61 of the first link member 6 has first and second transmission grooves 611 and 612, and these transmission grooves 61
1st, 2nd idle groove 61 formed between 612
0a and 610b. And the first,
When the engagement pin 71 slides in the second transmission grooves 611 and 612, the rotational force of the servo motor 8 (that is, the movement of the second link member 7) is transmitted to the door 4, and the door 4 introduces inside air. A position G for closing the mouth 2 (a position indicated by a solid line in FIG. 5A,
Hereinafter, it moves between the inside air opening closing position) and the position H (the position shown by the dashed line in FIG. 5A, hereinafter referred to as the outside opening closing position) that closes the outside air introduction port 3, and the first and second positions. When the engagement pin 71 slides in the 2 idle grooves 610a and 610b, the movement of the servomotor 8 is not transmitted to the door 4.

Here, as for the servo motor 8, the output shaft 82 rotates by 180 ° when energized and temporarily stops, and then is re-energized and the output shaft 82 rotates 180 ° in the same direction and stops. Are widely used. The air-conditioning control panel of the instrument panel provided in front of the passenger compartment is provided with an inside air mode switch for instructing inside air introduction and an outside air mode switch for instructing outside air introduction, and these mode switches are manually operated by the occupant. Can be switched. By inputting respective signals from these mode switches, the movable contact 80 shown in FIG. 4 is switched, and two fixed contacts 84 and 85 corresponding to the movable contact 80 are provided in the servo motor 8.

[0005] Also, three disk-side fixed contacts 861, 862, 863 are provided so as to be in contact with the rotating disk 83 which rotates integrally with the output shaft 82 of the servomotor 8. These fixed contacts 861, 862, 863 are supported and fixed at the illustrated positions, and do not rotate integrally with the rotating disk 83. Then, the two fixed contacts 84 and 85 and the disc-side contact 8
61 and 862 are connected to each other, and a disc-side contact 863 is provided.
Is connected to the negative side of the motor unit 81, and the motor unit 8
The battery voltage V is connected between the positive side of the battery 1 and the movable contact 80.

A range A of 180 ° of the rotating disk 83
Is formed with a first wiring (not shown) for connecting the disk-side contact 861 and the disk-side contact 863. In the remaining 180 ° range B of the rotating disk 83, the disk-side contact 862, the disk-side contact 863, Are connected to each other. When the inside air mode switch is turned on, the movable contact 80 and the fixed contact 84 are connected, and the disc-side contact 861 and the disc-side contact 863 are connected by the first wiring. As a result, the battery voltage V is supplied to the motor unit 81 (power is supplied), and the output shaft 82 and the rotating disk 83 rotate. Thereafter, the terminal end of the first wiring is connected to the disk-side contact 86.
1 and 863, the disk-side contact 861 and the disk-side contact 863 are disconnected from each other, and the supply of the battery voltage V to the motor unit 81 is stopped (the power is turned off).

When the outside air mode switch is turned on, the movable contact 80 and the fixed contact 85 are connected, and the disk-side contact 862 and the disk-side contact 863 are connected by the second wiring. As a result, the battery voltage V is supplied to the motor unit 81, and the output shaft 82 and the rotating disk 83 rotate.
When the terminal end of the second wiring passes through the disk-side contacts 862 and 863, the disk-side contact 862 and the disk-side contact 863 are disconnected, and the battery voltage V
Supply is stopped.

By the way, the disk side contact 861 and the disk side contact 863, and the disk side contact 862 and the disk side contact 863
Even if the state is disconnected, the output shaft 82 and the rotating disk 83 of the motor 8 continue to rotate slightly (for example, about 10 °) due to inertia (in other words, overrun).
For this reason, the first target stop position J (the motor portion 81) of the engagement pin 71 after the engagement pin 71 has moved through the first transmission groove 611.
5 (a) is set to a position closer to the engagement pin moving direction (the direction of arrow R in FIG. 5 (b)) than the second transmission groove 612. And the engagement pin 71 after the engagement pin 71 has moved through the second transmission groove 612.
Of the second target stop position K (the position indicated by the solid line in FIG. 5A)
Are set closer to the engagement pin moving direction than the first transmission groove 611. As a result, even if the engaging pin 71 is overrun, the engaging pin 71 remains in the first and second transmission grooves 611, 61.
2 so that the door 4 does not move due to overrun.

[0009]

However, in the above-mentioned prior art, the first target stop position J of the engaging pin 71 is determined as shown in FIG.
As shown in (b), the necessary minimum range D capable of absorbing the overrun is located on the front side of the transmission groove 612 in the engaging pin moving direction, but the second target stop position K is equal to the required minimum range D. , And a range (D + F) that is the sum of the range F and the transmission groove 611.

As described above, since the moving distance from the second target stop position K to the transmission groove 611 is longer than necessary by the range F, the electric power is supplied to the motor 8 and the engagement pin 71 is moved to the first transmission groove. There is a problem that the time required to reach 611 becomes longer than necessary, that is, the time from when the motor 8 is energized to when the door 4 starts to move to the outside air closing position H side becomes longer than necessary. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is directed to a servomotor which rotates 180 ° and temporarily stops when energized, and then rotates 180 ° in the same direction and stops when re-energized. In a link mechanism for transmitting a driving force of an output shaft to a driven member and selectively moving the driven member to a first predetermined position and a second predetermined position, the driven member starts moving after energizing the motor. The purpose is to minimize the time required to do so.

[0012]

In order to achieve the above object, the present inventor has proposed a second motor connected to a servomotor (8).
The target stop position (J, K) of the engagement pin (71) of the link member (7) is adjusted to the guide groove (6) of the first link member (6).
In the first and second idle grooves (610a, 610b) of 1), the servo motor is located more than necessary in the engaging pin moving direction (R) than the first and second transmission grooves (611, 612). Paying attention to the fact that the time from energization of (8) to the start of movement of the driven member (4) becomes longer, the target stop position (J, K) is set to the transmission groove (611, 6
It has been found that the engagement pin is moved in the necessary minimum range (D) in which the overrun can be absorbed more than the engagement pin movement direction (R).

More specifically, in the present invention, the servo is rotated by 180 ° and temporarily stopped by being energized, and then rotated by 180 ° in the same direction and stopped by being re-energized. The driving force of the output shaft (82) of the motor (8) is transmitted to the driven member (4), and the driven member (4) is moved to the first predetermined position (G) and the second predetermined position (H).
A first target stop position (J) of the engagement pin (71) after the engagement pin (71) has moved through the first transmission groove (611). In the idle groove (610a), the engagement pin is set to be closer to the engagement pin moving direction (R) by a predetermined range (D) than the second transmission groove (612), and the engagement pin (71) is set to the second transmission groove. The second target stop position (K) of the engagement pin (71) after moving (612) is set to the predetermined range (D) above the first transmission groove (611) of the second idle groove (610b). Only the engagement pin moving direction (R) is set on the near side.

Here, the first and second target stop positions (J, K) are positions instructing the stop of the movement of the engagement pin (71). In other words, the servomotor (8) ) Is the position where the power supply to () is stopped. The above-mentioned predetermined range (D) is a necessary minimum range in which overrun can be absorbed. Accordingly, the moving distance from the first target stop position (J) to the second transmission groove (612) and the movement distance from the second target stop position (K) to the first transmission groove (611).
Since the moving distance up to the maximum is the necessary minimum range (D), the driven member (4) moves to the first and second predetermined positions (G, H) after the motor (8) is energized. The time to start can be minimized.

Further, according to the present invention, the inside / outside air for selectively closing the inside air inlet (2) and the outside air inlet (3) formed in the air conditioning case (1) of the vehicle air conditioner. It is preferable to use the above-described means for a link mechanism that drives the switching door (4).

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. In this embodiment, as shown in FIG. 1A, a servo motor 8 is connected to an inside / outside air switching door 4 for selectively closing an inside air inlet 2 and an outside air inlet 3 formed in an air conditioning case 1 of a vehicle air conditioner. The present invention is applied to an inside / outside air switching link mechanism that transmits the rotational driving force of the present invention.
Note that the servo motor 8 of the present embodiment has the same structure as that described above, and a description thereof will be omitted.

The inside air inlet 2 and the outside air inlet 3 are formed at the most upstream portion of the air of the air conditioning case 1, and a blower for generating an air flow in the case 1 is provided downstream of the inlets 2 and 3. A well-known air-conditioning function unit such as an evaporator of the refrigeration cycle (heat exchanger for cooling) and a heater core (heat exchanger for heating) for heating the blast air using engine cooling water as a heat source is provided. A well-known blow-off air passage is formed in the downstream portion. A rotation shaft 40 is provided at the rotation center of the inside / outside air switching door 4, and both ends of the rotation shaft 40 are rotatably fitted into bearing holes (not shown) provided on the wall surface of the case 1. Has been inserted.

Next, the link mechanism for the inside / outside air switching door will be described with reference to FIGS. The link mechanism includes first, second, and third link members 6, 7, and 5. Specifically, the third link member 5 is disposed outside the case 1, and one end 5a of the third link member 5 is
The door 4 is integrally fixed to one end of a rotation shaft 40.
The first link member 6 is disposed outside the case 1, and a substantially central portion 6 c of the first link member 6 is rotatably attached to a shaft portion 11 (integral with the case 1) protruding from the case 1. I have. At one end 6a of the first link member 6,
An engagement pin 62 slidably engaged in a guide groove 51 of a predetermined shape provided on the other end 5b of the third link member 5 is provided. Thus, the first link member 6 and the door 4 are connected via the third link member 5.

The second link member 7 is disposed outside the case 1, and an output shaft 82 of the servomotor 8 is integrally fixed to one end 7a of the second link member 7. The other end 7b of the second link member 7 is provided with an engagement pin 71 slidably engaged in a guide groove 61 of a predetermined shape provided in the other end 6b of the first link member 6. ing. Then, the second link member 7 is rotated about the one end 7a by the rotational force of the output shaft 82 of the servo motor 8, and the second
The rotational movement of the link member 7 is transmitted to the first link member 6 via the engaging pin 71 to rotate the first link member 6 about the shaft portion 11, and the rotation of the first link member 6 The movement is transmitted to the third link member 5 via the engagement pin 62 and is rotated about the rotation shaft 40, whereby the inside / outside air switching door 4 is driven to rotate. The output shaft 82 of the servo motor 8 rotates only in the direction indicated by the arrow R in FIG.

The guide groove 61 of the first link member 6 includes first and second transmission grooves 611 and 612, and first and second idle grooves 610a and 610b. Specifically, the first transmission groove 611 transmits the movement of the engagement pin 71 to the door 4 and moves the door 4 to the inside air inlet 2 as shown in FIG.
From a position G (a first predetermined position, hereinafter referred to as an inside air opening closing position) to a position H (a second predetermined position, hereinafter referred to as an outside air opening closing position) as shown in FIG.
Is moved to The second transmission groove 612 transmits the movement of the engaging pin 71 to the door 4, and moves the door 4 from the outside air closing position H to the inside air closing position G.

The first idle groove 610a has a shape (specifically, the output of the servo motor 8) along the movement path when the engagement pin 71 moves from the first transmission groove 611 to the second transmission groove 612. (An arc shape along the arc-shaped movement path of the engagement pin 71 about the shaft 82). The second idle groove 610b has a shape along the movement path when the engagement pin 71 moves from the second transmission groove 612 to the first transmission groove 611.

The first and second idle grooves 610a and 610a
When the engagement pin 71 moves through the engagement pin 71, the engagement pin 71 moves.
Is not transmitted to the first link member 6, and the third link member 5 and the inside / outside air switching door 4 do not move. The first
The idle groove 610a is formed longer than the second idle groove 610b. Then, the first target stop position J (see FIG. 3) of the engaging pin 71 after the engaging pin 71 has moved through the first transmission groove 611 (in other words, after the door 4 has been moved to the outside air opening closing position H). Is the first idle groove 610a.
Of these, the moving direction of the engaging pin is the necessary minimum range D in which the overrun can be absorbed more than the second transmission groove 612 (FIG. 1B).
(In the direction of the middle arrow R) is set to the near side and the engagement pin 71
Has moved through the second transmission groove 612 (in other words, the door 4
The second target stop position K (the position shown in FIG. 1) of the engagement pin 71 after the second idle groove 610 is moved to the inside air port closing position G (the position shown in FIG. 1) is more overrun than the first transmission groove 611 in the second idle groove 610 b. Is set at the front side in the moving direction of the engagement pin by a necessary minimum range D capable of absorbing the pressure.

Here, the first and second target stop positions J and K of the engagement pin 71 are positions where the stop of the movement of the engagement pin 71 is instructed. Is the position where the energization is stopped. In the present embodiment, the necessary minimum range D is set to, for example, 10 °. Next, the operation of the above configuration will be described.

First, when the inside air introduction mode is instructed by the inside / outside air changeover switch, the movable contact 80 is connected to the fixed contact 84 in FIG.
Numeral 1 is arranged between the second target stop position K and the maximum overrun position (the position indicated by the dotted line in FIG. 1B) in the second idle groove 610b. When switching from this state to the outside air introduction mode, in FIG.
Is connected to the fixed contact 85 and the disk-side contact 86
2 and the disk-side contact 863 are connected by the second wiring,
The battery voltage V is supplied to the motor unit 81.

As a result, the output shaft 82 of the motor 8 is
(B) The rotation of the door 4 in the middle R direction causes the engagement pin 71 to move, and the engagement pin 71 moves in the first transmission groove 611 as shown in FIG. Move to. Thereafter, the engagement pin 71 is moved to the first idle groove 610.
a, when the disk reaches the first target stop position J, the disk-side contact 862 and the disk-side contact 863 are in a disconnected state, but the output shaft 82 of the motor 8 and the rotating disk 83 are in the first position due to overrun. It stops between the target stop position J and the maximum overrun position (the position indicated by the dotted line in FIG. 1B).

When the mode is again switched to the inside air introduction mode from this state, the operation is stopped between the second target stop position K and the maximum overrun position (the position indicated by the dotted line in FIG. 1B) by the same operation. . In the present embodiment, the first
Moving distance from the target stop position J to the second transmission groove 612,
In addition, since the moving distance from the second target stop position K to the first transmission groove 611 is at most the required minimum range D, the inside / outside air switching door 4 is turned on after the servo motor 8 is energized. And the time required to start moving to the outside air port closing position H side can be minimized. Therefore, the time required to close the inside air inlet 2 and the outside air inlet 3 can be minimized.

Here, in the prior art, there is a problem that it takes a longer time to close the outside air inlet 3 than to close the inside air inlet 2, and it is not possible to rapidly block the intrusion of the outside air containing a strange odor. However, according to the present embodiment, this problem can be solved. In this embodiment, the first and second target stop positions J and K of the engaging pin 71 are set to the first and second idle grooves by forming the first idle groove 610a longer than the second idle groove 610b. Of the grooves 610a and 610b, the necessary minimum range D can be set closer to the engagement pin moving direction than the second and first transmission grooves 612 and 611.

(Other Embodiments) In the above embodiment, the present invention is applied to the inside / outside air switching door 4, but the present invention is not limited to this, and the present invention may be applied to various other driven members. .
Further, in the above embodiment, the driven member (the inside / outside air switching door 4) and the first link member 6 are connected via the third link member 5, but the driven member and the first link member 6 are connected to each other. May be directly connected.

The rotation direction of the servo motor 8 may be opposite to the rotation direction R in the above embodiment. At this time, the second idle groove 610b is replaced with the first idle groove 610a.
It is formed longer.

[Brief description of the drawings]

FIG. 1A is a front view showing an inside / outside air switching door link mechanism when an inside / outside air switching door is at an inside air opening closing position G in the embodiment of the present invention, and FIG. 1B is a front view of FIG. It is a partial enlarged view.

FIG. 2 is a front view showing the inside / outside air switching door link mechanism when the inside / outside air switching door moves to the outside air port closing position H side in the embodiment of the present invention.

FIG. 3 is a front view showing the inside / outside air switching door link mechanism when the inside / outside air switching door is at an outside air port closing position H in the embodiment of the present invention.

FIG. 4 is a schematic circuit diagram showing a servomotor according to the present invention and the prior art.

FIG. 5A is a front view of the related art when the inside / outside air switching door is at the inside air opening closing position G and when it is at the outside air opening closing position H, and FIG. 5B is a part of FIG. It is an enlarged view.

[Explanation of symbols]

4 inside / outside air switching door (driven member), 6 first link member, 61 guide groove, 611 first transmission groove, 612 second transmission groove, 610a first idle groove, 610b second
Idle groove, 7: second link member, 71: engagement pin, 8
... Servo motor, 82... Output shaft, G... Inside air opening closing position (first predetermined position), H... Outside air opening closing position (second predetermined position), J. 1st target stop position, K. ,
D: Required minimum range (predetermined range).

Claims (4)

[Claims] When the power is turned on, the motor rotates once by 180 ° and stops temporarily.
The driving force of the output shaft (82) of the servo motor (8), which is stopped after rotating by 80 °, is transmitted to the driven member (4), and the driven member (4) is moved to the first predetermined position (G) and to the first predetermined position (G). (2) a link mechanism for selectively moving to a predetermined position (H), wherein the first link member (6) connected to the driven member (4) and having a guide groove (61) having a predetermined shape; An engagement pin (7) connected to the output shaft (82) of the motor (8) and engaged in the guide groove (61).
The guide groove (61) transmits the movement of the engaging pin (71) to the driven member (4), and the second guide member (7) has the second link member (7). 4) a first transmission groove (611) for moving the first transmission groove (611) from the first predetermined position (G) to the second predetermined position (H), and a distance from the first transmission groove (611); The second movement of transmitting the movement of the mating pin (71) to the driven member (4) to move the driven member (4) from the second predetermined position (H) to the first predetermined position (G). A transmission groove (612); and a first idle groove (610a) shaped along a movement path when the engagement pin (71) moves from the first transmission groove (611) to the second transmission groove (612). ), And the engagement pin (71) is moved from the second transmission groove (612) to the first transmission groove (611). A second idle groove (610b) having a shape along the movement path when moving, and the engagement pin (71) after the engagement pin (71) has moved through the first transmission groove (611). The first target stop position (J) of the first idle groove (610a) is set on the engagement pin moving direction (R) side by a predetermined range (D) from the second transmission groove (612). The second target stop position (K) of the engagement pin (71) after the engagement pin (71) has moved through the second transmission groove (612) is the same as that of the second idle groove (610b). The link mechanism is set at a position closer to the engagement pin moving direction (R) by the predetermined range (D) than the first transmission groove (611). 2. The first and second idle grooves (610).
a) and (610b) are formed in an arc shape along the arc-shaped movement path of the engagement pin (71) about the output shaft (82) of the servo motor (8); 1. Second idle groove (610a), (610b)
Are arranged so as to face each other, and the first and second idle grooves (610a) and (610b)
The first transmission groove (611) is formed to connect one end of the first and second idle grooves (610).
The link mechanism according to claim 1, wherein the second transmission groove (612) is formed so as to connect the other ends of (a) and (610b). 3. The first and second idle grooves (610).
a), one of (610b) (610a) is replaced with the first,
The other (6) of the second idle grooves (610a) and (610b)
2. The structure according to claim 1, wherein the length is longer than 10b).
Or the link mechanism according to 2. 4. The inside / outside air switching door, wherein the driven member (4) selectively closes an inside air inlet (2) and an outside air inlet (3) formed in an air conditioning case (1) of a vehicle air conditioner. (4) The first predetermined position (G) is the inside / outside air switching door (4).
Is a position where the inside air inlet (2) is closed, and the second predetermined position (H) is a position where the inside / outside air switching door (4) closes the outside air inlet (3). 4. The link mechanism according to any one of 1 to 3.