JP3624789B2 - Link mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a link mechanism that transmits a rotational movement of an output shaft of a driving means to a driven member and rotates the driven member between a first position and a second position.
[0002]
[Prior art]
Conventionally, as the link mechanism as described above, as shown in FIG. 6, an inside / outside air switching door 4 that selectively closes the inside air introduction port 2 and the outside air introduction port 3 formed in the air conditioning case 1 of the vehicle air conditioner. There are some that apply.
[0003]
Specifically, the driven link member 5 having a guide groove 51 having a predetermined shape is assembled to the shaft 9 rotatably attached to the case 1, and the drive pin 71 is slidably engaged in the guide groove 51. Is connected to the output shaft 81 of the servo motor 8. The door 4 assembled to the shaft 9 is obtained by adhering (adhering) packing 42 made of a porous foam material to both sides of a substrate 41 made of a highly rigid material (resin). , 31 so as to selectively close the inside air introduction port 2 and the outside air introduction port 3.
[0004]
[Problems to be solved by the invention]
However, in the conventional vehicle air conditioner, the drive link member 7 is set at a position corresponding to the inside air port closing position G, the servo motor 8 and the drive link member 7 are assembled in advance, and then the drive link member 7 is driven. The pin 71 is engaged with the guide groove 51 of the driven link member 5 so that the servo motor 8 is fixed to the case 1 with screws.
[0005]
On the other hand, when the door 4 is moved to the position G where the inside air introduction port 2 is closed or the position H where the outside air introduction port 3 is closed, the packing 42 of the door 4 is pressed against the seat surfaces 21 and 31 so as to be compressed. Is set.
[0006]
Therefore, when the servo motor 8 is fixed to the case 1 with screws, the screws of the servo motor 8 are pressed while pushing the driven link member 5 in the A direction so as to press the packing 42 of the door 4 against the seat surface 21 of the case 1. The positions of the through hole 83 and the screw screw hole of the case 1 are aligned, and the screw is tightened while maintaining the state.
[0007]
Thus, it is necessary to perform the screw tightening work while pushing the driven link member 5 in the A direction, and there is a problem that workability at the time of screw tightening is poor.
[0008]
The present invention has been made in view of the above problems, and transmits a rotational movement of an output shaft of a driving means to a driven member, and rotates the driven member between a first position and a second position. It is an object of the present invention to improve workability when assembling the driving means.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the rotational movement of the output shaft (81) of the drive means (8) is transmitted to the driven member (4), and the driven member (4) is transmitted. A link mechanism that rotates between a first position (G) and a second position (H), provided on a drive link member (7) that rotates with an output shaft (81), and a drive link member (7) An intermediate link member (6) having an intermediate guide groove (61) with which the drive pin (71) contacts, and rotating around the support shaft (11) as the drive pin (71) moves, and an intermediate link member ( 6) A driven link member (5) having a driven guide groove (51) with which the intermediate pin (62) provided in 6) contacts, and rotating with the driven member (4) as the intermediate pin (62) moves. The driven guide groove (51) includes a driven member (4) in the first position (G) and the first position (G). When positioned on one side of the position (H), capable of holding the intermediate link member (6) in position, characterized in that the retaining groove (512) is formed.
[0010]
According to this, even if the operator does not hold the link member as in the conventional case, the intermediate link member is held in a predetermined position, so that the screw tightening workability when the drive means and the drive link member are assembled to the case is improved. Will improve.
[0011]
As in the second aspect of the present invention, when the intermediate pin (62) is in a position in contact with the holding groove (512), the holding groove (512) substantially coincides with the rotation trajectory of the intermediate pin (62). The shape is desirable. The holding groove (512) has an arc shape centered on the support shaft (11) when the intermediate pin (62) is in a position in contact with the holding groove (512), as in the third aspect of the invention. Further, as in the invention described in claim 4, when the intermediate pin (62) is in a position in contact with the holding groove (512), the support shaft (11) and the intermediate pin (62) May extend in a direction substantially perpendicular to the line connecting the two.
[0012]
In addition, an internal / external air switching door that selectively closes the internal air inlet (2) and the external air inlet (3) formed in the air conditioning case (1) of the vehicle air conditioner as in the invention described in claim 5 ( The above-described means is suitable for the link mechanism for driving 4).
[0013]
In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
FIG. 1 and FIG. 2 show the first embodiment. The inside / outside air switching door 4 selectively closes the inside air introduction port 2 and the outside air introduction port 3 formed in the resin air conditioning case 1 of the vehicle air conditioner. The present invention is applied to an inside / outside air switching link mechanism that transmits a rotational driving force of a servo motor (drive means) 8. In FIG. 1, the servo motor 8 is omitted for easy understanding of the structure of the link mechanism.
[0015]
The inside air introduction port 2 and the outside air introduction port 3 are formed in the most upstream part of the air conditioning case 1, and downstream of these introduction ports 2 and 3, a blower that generates an air flow in the case 1, a refrigeration cycle Well-known air-conditioning functions such as an evaporator (cooling heat exchanger) and a heater core (heating heat exchanger) that heats blown air using engine cooling water as a heat source are arranged. Is formed with a known blown air passage portion. A door shaft 9 is provided at the center of rotation of the inside / outside air switching door 4, and both end portions of the door shaft 9 are rotatably inserted into bearing holes (not shown) provided on the wall surface of the case 1. ing.
[0016]
The door 4 is formed by adhering (sticking) a packing 42 made of a porous foam material to both sides of a substrate 41 made of a highly rigid material (resin), and the door 4 is connected to the inside air introduction port 2 and the outside air introduction port 3 of the case 1. The inside air introduction port 2 and the outside air introduction port 3 are selectively closed while being in contact with and separated from the sheet surfaces 21 and 31 formed in the periphery.
[0017]
Next, the link mechanism for the inside / outside air switching door will be described. This link mechanism is composed of three link members 5, 6, 7 made of resin. Specifically, the driven link member 5 is disposed outside the case 1, one end of the driven link member 5 is connected and fixed to one end of the door shaft 9, and the driven link member 5 and the inside / outside air switching door 4 are connected. It is designed to rotate integrally.
[0018]
The intermediate link member 6 is disposed outside the case 1, and one end portion of the intermediate link member 6 is rotatably attached to a support shaft 11 protruding from the case 1 (integrated with the case 1). An intermediate pin 62 is provided at the other end of the intermediate link member 6 so as to be slidably engaged in a predetermined shape of the driven guide groove 51 provided at the other end of the driven link member 5. In this way, the intermediate link member 6 and the door 4 are connected via the driven link member 5.
[0019]
The drive link member 7 is disposed outside the case 1, and one end of the drive link member 7 is connected and fixed to the output shaft 81 of the servo motor 8. At the other end of the drive link member 7, a drive pin 71 is slidably engaged in an intermediate guide groove 61 having a predetermined shape provided in the intermediate link member 6.
[0020]
Then, the drive link member 7 is rotated by the rotational force of the output shaft 81 of the servo motor 8, and the rotation movement of the drive link member 7 is transmitted to the intermediate link member 6 via the drive pin 71, thereby supporting the shaft 11. The intermediate link member 6 is rotated around the center, the rotational movement of the intermediate link member 6 is transmitted to the driven link member 5 via the intermediate pin 62, and the door shaft 9 is rotated about the door. The shaft 9 and the door 4 are rotated.
[0021]
The output shaft 81 of the servo motor 8 rotates only in the clockwise direction in FIG. Further, when the servo motor 8 is energized, the output shaft 81 rotates 180 ° and stops temporarily, and when the servo motor 8 is re-energized, the output shaft 81 rotates 180 ° in the same direction and stops.
[0022]
The driven guide groove 51 of the driven link member 5 is bent in a substantially “<” shape, and includes a driven transmission groove 511 and a holding groove portion 512. The driven transmission groove 511 on the side close to the door shaft 9 is substantially linear, and transmits the movement of the intermediate pin 62 accompanying the rotation of the intermediate link member 6 to the door 4.
[0023]
Further, the holding groove portion 512 on the side far from the door shaft 9 has a shape that substantially coincides with the rotation trajectory of the intermediate pin 62 when the intermediate pin 62 is in a position (position in FIG. 1) in contact with the holding groove portion 512. More specifically, it has an arc shape along the arcuate rotation trajectory of the intermediate pin 62 with the support shaft 11 as the center. Accordingly, when the intermediate pin 62 moves in the holding groove portion 512, the movement of the intermediate pin 62 is not transmitted to the driven link member 5, and the driven link member 5 and the inside / outside air switching door 4 do not move.
[0024]
The intermediate guide groove 61 of the intermediate 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 drive pin 71 to the door 4 via the driven link member 5 or the like, and the position G closes the inside air inlet 2 as shown in FIG. The outside air introduction port 3 as shown in FIG. 2 is moved from the first position (hereinafter referred to as the inside air port closing position) to the position H (second position, hereinafter referred to as the outside air port closing position). The second transmission groove 612 transmits the movement of the drive pin 71 to the door 4 and moves the door 4 from the outside air port closing position H to the inside air port closing position G.
[0025]
The first idle groove 610a has a shape along the movement path when the drive pin 71 moves from the first transmission groove 611 to the second transmission groove 612 (specifically, the output shaft 81 of the servo motor 8 is centered). Arc shape along the movement path of the drive pin 71. The second idle groove 610b has a shape along the movement path when the drive pin 71 moves from the second transmission groove 612 to the first transmission groove 611. When the drive pin 71 moves through the first and second idle grooves 610a and 610b, the movement of the drive pin 71 is not transmitted to the intermediate link member 6, and the driven link member 5 and the inside / outside air switching door 4 do not move.
[0026]
The motor case 82 of the servo motor 8 is formed in a substantially rectangular parallelepiped shape, and four through holes 83 are formed at the corners. Then, after inserting a screw (not shown) into the through hole 83, the servo motor 8 is attached to the air conditioning case 1 by being screwed into a screw screw hole (not shown) of the air conditioning case 1.
[0027]
Next, the operation according to the above configuration will be described. First, when the servo motor 8 rotates 180 ° from the state in which the door 4 is at the inside-mouth closed position G in FIG. 1, the output shaft 81 of the motor 8 rotates in the clockwise direction, and the drive pin 71 moves. 71 moves the first transmission groove 611 while rotating the intermediate link member 6 in the clockwise direction. As the intermediate link member 6 rotates, the intermediate pin 62 rotates the driven link member 5 counterclockwise while moving in the driven transmission groove 511. Thereby, the door shaft 9 and the door 4 are rotated in the counterclockwise direction, and the door 4 is moved to the outside air port closing position H shown in FIG.
[0028]
Further, when the servo motor 8 rotates 180 ° again from this state, the output shaft 81 of the motor 8 rotates in the clockwise direction, and the drive pin 71 moves in the second transmission groove 612 while the intermediate link member 6 is counterclockwise. Turn in the turning direction. As the intermediate link member 6 rotates, the intermediate pin 62 moves the driven transmission groove 511 and rotates the driven link member 5 in the clockwise direction. As a result, the door shaft 9 and the door 4 rotate in the clockwise direction, and the door 4 moves to the inside air port closing position G shown in FIG. Note that, in the inside air port closing position G, the intermediate pin 62 is in a position in contact with the holding groove portion 512, and the packing 42 of the door 4 is in contact with the seat surface 21 and is in a compressed state.
[0029]
Next, a procedure for assembling the link mechanism and the like will be described. First, the door 4 is set to the inside air port closing position G, the driven link member 5 and the intermediate link member 6 are assembled to the air conditioning case 1, and in parallel, the drive link member 7 corresponds to the inside air port closing position G. The servo motor 8 and the drive link member 7 are assembled in the position. Thereafter, the drive pin 71 of the drive link member 7 is engaged with the intermediate guide groove 61 of the intermediate link member 6 to fix the servo motor 8 to the air conditioning case 1 with screws.
[0030]
By the way, when the door 4, the driven link member 5, and the intermediate link member 6 are assembled to the air conditioning case 1, the driven link member 5 and the intermediate link member 6 are positioned so that the intermediate pin 62 comes to a position in contact with the holding groove portion 512. To do. In this state, since the packing 42 of the door 4 is in a compressed state by hitting the seat surface 21, a torque is generated to return the door 4 and the driven link member 5 counterclockwise by the repulsive force of the packing 42. .
[0031]
Here, when the intermediate pin 62 is in a position where the intermediate pin 62 is in contact with the holding groove portion 512, the holding groove portion 512 of the present embodiment has an arc shape along the arcuate rotation trajectory of the intermediate pin 62 around the support shaft 11. Therefore, torque due to the repulsive force of the packing 42 is applied to the support shaft 11. Therefore, the driven link member 5 and the intermediate link member 6 do not rotate. That is, the driven link member 5 and the intermediate link member 6 are self-held at the inside-mouth closed position G.
[0032]
For this reason, when assembling the servo motor 8 and the drive link member 7 to the air conditioning case 1, it is not necessary for the operator to hold the state where the packing 42 is pressed against the seat surface 21 as in the prior art. 83 and the screw screw holes of the case 1 can be easily aligned, and the workability at the time of screw tightening is improved.
[0033]
(Second Embodiment)
3 to 5 show the second embodiment, and FIG. 3 shows that the door 4 moves to the inside-mouth closed position G in the normal operating range of the intermediate link member 6 (the range rotated by the servo motor 8). FIG. 4 shows a state in which the door 4 has been moved to the outside air port closing position H in the normal operating range of the intermediate link member 6, and FIG. 5 shows the air conditioning of the servo motor 8 and the drive link member 7. The state at the time of attaching to case 1 is shown. In addition, the same code | symbol is attached | subjected to the same or equivalent part as 1st Embodiment.
[0034]
In the first embodiment, in the normal operating range of the intermediate link member 6, when the door 4 is moved to the inside air port closing position G, the intermediate pin 62 comes to a position where it comes into contact with the holding groove portion 512. In the embodiment, as shown in FIG. 3, when the door 4 is moved to the inside-mouth closed position G by the servo motor 8, the intermediate pin 62 is in a position in contact with the driven transmission groove 511 and not in contact with the holding groove portion 512. It is like that. Even in this state, the packing 42 of the door 4 is in contact with the seat surface 21 and is in a compressed state.
[0035]
When the servo motor 8 and the drive link member 7 are assembled to the air conditioning case 1, the intermediate link member 6 is operated in a normal operation so that the intermediate pin 62 comes to a position in contact with the holding groove 512 as shown in FIG. Rotate counterclockwise out of range. Here, as in the first embodiment, the holding groove portion 512 is an arc along the arcuate rotation trajectory of the intermediate pin 62 around the support shaft 11 when the intermediate pin 62 is in a position in contact with the holding groove portion 512. Since it has a shape, the driven link member 5 and the intermediate link member 6 are self-held at the inside-mouth closed position G by rotating the intermediate link member 6 to the position shown in FIG.
[0036]
Accordingly, as in the first embodiment, when the servo motor 8 and the drive link member 7 are assembled to the air conditioning case 1, it is not necessary for the operator to hold the state where the packing 42 is pressed against the seat surface 21 as in the prior art. Workability when tightening screws is improved.
[0037]
Further, when the servo motor 8 and the drive link member 7 are assembled to the air conditioning case 1, the intermediate link member 6 is rotated counterclockwise beyond the normal operating range. 2 A gap is formed between the idle groove 610 b and the drive pin 71 of the drive link member 7. Therefore, the positioning of the screw through hole 83 of the servo motor 8 and the screw screw hole of the case 1 is further facilitated, and the workability at the time of screw tightening is further improved.
[0038]
(Other embodiments)
The holding groove portion 512 of each of the embodiments described above has an arc shape that coincides with the rotation trajectory of the intermediate pin 62 when the intermediate pin 62 is in a position in contact with the holding groove portion 512, but the holding groove portion 512 has the support shaft 11. A linear shape extending in a direction perpendicular to a line connecting the intermediate pin 62 and the intermediate pin 62 may be used.
[0039]
In addition, the holding groove portion 512 of each of the above embodiments does not have to be completely coincident with the rotation trajectory of the intermediate pin 62 or the perpendicular to the line connecting the support shaft 11 and the intermediate pin 62. It should just be substantially coincident with the perpendicular. That is, when the servo motor 8 and the drive link member 7 are assembled to the air conditioning case 1, the intermediate link member 6 is fixed to a predetermined amount by the frictional force between the intermediate pin 62 and the holding groove 512 and the frictional force between the support shaft 11 and the intermediate pin 62. It only needs to be able to hold itself in position.
[0040]
Moreover, in the said embodiment, although this invention was applied to the inside / outside air switching door 4, this invention may be applied not only to this but to various other driven members.
[Brief description of the drawings]
FIG. 1 is a front view showing an inside / outside air switching door link mechanism when an inside / outside air switching door is in an inside air port closing position G in the first embodiment of the present invention.
FIG. 2 is a front view showing the link mechanism for the inside / outside air switching door when the inside / outside air switching door is in the outside air closing position H in the first embodiment of the present invention.
FIG. 3 is a front view showing an inside / outside air switching door link mechanism when the inside / outside air switching door is at an inside air port closing position G in the second embodiment of the present invention.
FIG. 4 is a front view showing a link mechanism for an inside / outside air switching door when the inside / outside air switching door is in an outside air closing position H in the second embodiment of the present invention.
FIG. 5 is a front view showing a link mechanism for an inside / outside air switching door when the servo motor is assembled in the second embodiment of the present invention.
FIG. 6 is a front view showing a conventional link mechanism for an inside / outside air switching door.
[Explanation of symbols]
4 ... Inside / outside air switching door (driven member), 5 ... driven link member,
51 ... driven guide groove, 512 ... holding groove, 6 ... intermediate link member,
61 ... Intermediate guide groove, 62 ... Intermediate pin, 7 ... Drive link member, 71 ... Drive pin,
8 ... Servo motor (drive means), 81 ... Output shaft, 11 ... Support shaft,
G: Inside-mouth closed position (first position), H: Outside-mouth closed position (second position).

Claims (5)

The rotational movement of the output shaft (81) of the drive means (8) is transmitted to the driven member (4), and the driven member (4) is moved between the first position (G) and the second position (H). A rotating link mechanism,
A drive link member (7) rotating with the output shaft (81);
An intermediate guide groove (61) in contact with a drive pin (71) provided on the drive link member (7), and rotating around a support shaft (11) as the drive pin (71) moves. A link member (6);
A driven guide groove (51) with which an intermediate pin (62) provided on the intermediate link member (6) is in contact, and is driven to rotate together with the driven member (4) as the intermediate pin (62) moves. A link member (5),
The driven guide groove (51)
A holding groove that can hold the intermediate link member (6) at a predetermined position when the driven member (4) is located on one side of the first position (G) and the second position (H). (512) The link mechanism characterized by the above-mentioned. The holding groove portion (512) has a shape that substantially coincides with the rotational trajectory of the intermediate pin (62) when the intermediate pin (62) is in a position in contact with the holding groove portion (512). The link mechanism according to claim 1. The holding groove (512) has an arc shape centered on the support shaft (11) when the intermediate pin (62) is in a position in contact with the holding groove (512). 2. The link mechanism according to 2. When the intermediate pin (62) is in a position in contact with the holding groove (512), the holding groove (512) is approximately the line connecting the support shaft (11) and the intermediate pin (62). The link mechanism according to claim 2, wherein the link mechanism extends in a vertical direction. The driven member (4) is an inside / outside air switching door (4) that selectively closes the inside air introduction port (2) and the outside air introduction port (3) formed in the air conditioning case (1) of the vehicle air conditioner. The link mechanism according to any one of claims 1 to 4, characterized in that:

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