JP4434072B2 - Link device and vehicle air conditioner - Google Patents

Description

  The present invention relates to a link device that transmits driving force from a driving device to a plurality of driven members, and is applied to an operation mechanism of an air passage opening / closing door in a vehicle air conditioner.

  Conventionally, Patent Document 1 describes a link device that transmits a driving force from a driving device to a plurality of driven members. In this prior art, two drive groove portions are formed in one link plate that is rotated by a drive force from a drive device, and the pin portions of two driven levers are slidably fitted in the two drive groove portions. The rotational displacements of the two driven levers are transmitted to different doors to rotate the two doors.

Further, in the prior art, two drive groove portions are formed in a double circular arc shape aligned on the inner side and the outer side in the radial direction of the link plate, and one end portion in the circumferential direction of the inner and outer drive groove portions is formed as one groove portion. The common groove portion of the two drive groove portions is formed by joining.
JP 2004-218819 A

  By the way, in the prior art, since the two drive groove portions are formed in a double arc shape that is aligned inside and outside in the radial direction of the link plate, there arises a problem that the link plate is enlarged. This is because if the diameter of the drive groove (diameter from the center of rotation of the link plate) is reduced, the engagement between the inner wall of the drive groove and the pin of the driven lever will increase, and the driven lever will not rotate smoothly. This makes it difficult to establish a link mechanism.

  Therefore, if the diameter dimension of the inner drive groove part in the link plate is set to be equal to or larger than the predetermined dimension necessary for the establishment of the link mechanism, the diameter dimension of the outer drive groove part in the link plate is necessarily the diameter dimension of the inner drive groove part. Will exceed the predetermined amount. As a result, the size of the link plate increases, resulting in problems such as an increase in the cost of the link plate and interference between the link plate and peripheral devices.

  An object of this invention is to achieve size reduction of the link plate which has a some drive groove part in view of the said point.

In order to achieve the above object, in the invention according to claim 1, one link plate (23) rotated by the drive device (24),
A first drive groove (26) and a second drive groove (27) provided in the link plate (23);
A first pin portion (21a) slidably fitted in the first drive groove portion (26) and a second pin portion (slidably fitted in the second drive groove portion (27 )). 29b)
A first driven member (21) that is displaced in accordance with the displacement of the first pin portion (21a);
In a link device provided with the 2nd follower member (29, 22) displaced with displacement of the 2nd above-mentioned pin part (29b),
The link plate (23) is formed in a plate shape having a substantially arc-shaped outer edge,
The first drive groove (26) and the second drive groove (27) are formed so as to be continuous in the circumferential direction in a single groove shape along the outer edge of the substantially arc shape,
A common groove portion in which the first pin portion (21a) and the second pin portion (29b) are fitted together between the first drive groove portion (26) and the second drive groove portion (27). 28) is formed.

  According to this, the first and second drive groove portions (26, 27) are formed to be continuous in the circumferential direction in the shape of one groove along the outer edge portion of the link plate (23). Since the common groove portion (28) is formed between the groove portions (26, 27), the outer shape of the link plate (23) can be effectively downsized in both the radial direction and the circumferential direction. As a result, not only can the manufacturing cost of the link plate (23) be reduced, but also interference between the link plate (23) and peripheral devices can be avoided.

  As in the second aspect of the present invention, in the link device according to the first aspect, the common groove portion (28) is more specifically configured so that the first pin even when the link plate (23) rotates. It is an idle groove part in which the position of the part (21a) and the second pin part (29b) does not change.

  According to this, the idle function of the 1st and 2nd driven member can be exhibited by one common groove part (28).

In invention of Claim 3, the link apparatus of Claim 1 or 2;
A case (11) in which air flows into the passenger compartment;
A first door (19) disposed in the case (11) and opening and closing a first air passage (16, 18) in the case (11);
A second door (20) disposed in the case (11) and opening and closing a second air passage (17) in the case (11);
The vehicle air conditioner configured to open and close the first door (19) by the first driven member (21) and open and close the second door (20) by the second driven member (29, 22). It is characterized by.

  According to this, the first door (19) and the second door (20) of the vehicle air conditioner can be opened and closed by the rotational displacement of one link plate (23), and the link plate (23) can be reduced in size to link plate. Interference between (23) and peripheral devices can be avoided, and the vehicle mountability of the air conditioner can be improved.

  According to a fourth aspect of the present invention, in the vehicle air conditioner according to the third aspect, the drive device is a servo motor (24), and the outer surface of the case (11) and the servo motor (24) The link plate (23) is disposed between them.

  According to this, since the interference between the link plate (23) and the mounting portion of the servo motor (24) can be avoided by downsizing the link plate (23), the servo motor (24) is directly attached to the outer surface of the case (11). Can be attached.

  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.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. This embodiment relates to a link device used as an operation mechanism for an air passage opening / closing door in a vehicle air conditioner, and FIG. 1 is a cross-sectional view showing an indoor air conditioner unit 10 in the vehicle air conditioner.

  The indoor air conditioning unit 10 is mounted in an instrument panel in the front part of the vehicle interior. In addition, the up and down and front and rear arrows in FIG.

  The indoor air-conditioning unit 10 has a resin case 11, and an air inlet space 11a is formed in the lowermost part of the resin case 11. Air blown from a blower unit (not shown) flows into the air inlet space 11a. .

  Above the air inlet space 11a, the evaporator 12 of the refrigeration cycle that forms a cooling heat exchanger is arranged in a substantially horizontal direction. For this reason, the air in the air inlet space 11a passes through the evaporator 12 from the lower side to the upper side.

  On the upper side of the evaporator 12, a heater core 13 that forms a heat exchanger for heating is disposed in a substantially horizontal direction. The heater core 13 heats air using hot water (engine cooling water) as a heat source. A bypass passage 14 is formed on the side of the heater core 13 (the vehicle rear side). The air volume ratio between the air passing through the heater core 13 (hot air) and the air passing through the bypass passage 14 (cold air) is adjusted by the air mix door 15 to adjust the temperature of the air blown into the vehicle interior.

  Of the upper surface of the case 11, a defroster opening 16 is disposed on the vehicle front side, and a face opening 17 is disposed on the vehicle rear side of the defroster opening 16. In the case 11, foot openings 18 are arranged on the left and right sides below the defroster opening 16.

  The defroster opening 16 and the foot opening 18 are opened and closed by a single foot differential door 19, and the face opening 17 is opened and closed by a face door 20. The face door 20 also serves to open and close a communication passage 31 that connects the defroster opening 16 and the foot opening 18 to the passage portion (air mixing portion) 30 on the downstream side of the air mix door 15.

Both the doors 19 and 20 are flat doors that can rotate around the rotation shafts 19a and 20a. Here, the foot differential door 19 is formed of a butterfly door in which a rotary shaft 19a is integrally disposed at a central portion in the door length direction. The face door 20 is a cantilever door in which a rotary shaft 20a is integrally disposed at one end in the door length direction.

  FIG. 2 shows a link device constituting a door operation mechanism for rotating the foot differential door 19 and the face door 20. A foot differential door lever 21 is integrally coupled to a rotation shaft 19 a of the foot differential door 19. A face door lever 22 is integrally coupled to the rotary shaft 20a.

  Specifically, one end portion of the rotary shafts 19a, 20a of the doors 19, 20 penetrates the wall surface of the case 11 and protrudes to the outside of the case 11, and the levers 21, 22 are integrally coupled to the protruding end portions, respectively. is doing. Therefore, the link device of FIG. 2 including the levers 21 and 22 is disposed outside the case 11.

  The link plate 23 is a drive-side link member that drives the levers 21 and 22 and is formed in a substantially semicircular plate shape having a substantially arc-shaped outer edge. Here, the outer edge of the link plate 23 having a substantially arc shape is a portion illustrated on the lower side of FIG.

  The servo motor 24 is a drive device for the link plate 23. The output shaft 25 of the servo motor 24 is integrally coupled to the link plate 23, and the rotation of the output shaft 25 is directly transmitted to the link plate 23, so that the link plate 23 outputs. It rotates about the axis 25.

  The servo motor 24 is disposed at a portion on the side opposite to the case with respect to the link plate 23. Therefore, the link plate 23 is rotatably disposed in the gap portion between the outer surface of the case 11 and the servo motor 24.

  The outer shape of the servo motor 24 is substantially rectangular, and mounting bosses 24a to 24d are set at the four corners of the rectangular shape, and among the mounting bosses 24a to 24d at the four corners, three mounting bosses are provided. 24 a to 24 c are set at positions where they do not interfere with the link plate 23.

  Therefore, in this embodiment, a servo motor is inserted by inserting a mounting screw (not shown) into the boss portions 24a to 24c and fastening the mounting screw to a mounting female screw portion (not shown) on the case 11 side. A structure in which 24 is directly attached (attached directly) to the case 11 is adopted.

  In the substantially semicircular plate shape of the link plate 23, two drive groove portions 26 and 27 are formed in a portion along the arc-shaped outer edge portion. The first drive groove 26 is for driving the foot differential door lever 21, and the second drive groove 27 is for driving the face door lever 22. The levers 21 and 22 are disposed adjacent to the outer surface of the case 11, and the link plate 23 is disposed on the side farther from the outer surface of the case 11 than the levers 21 and 22.

  Both the first drive groove portion 26 and the second drive groove portion 27 are formed so as to extend in the circumferential direction along the arc-shaped outer edge portion of the link plate 23, and the first drive groove portion 26 and the second drive groove portion A common groove portion of both the groove portions 26 and 27, more specifically, a common idle groove portion 28 is formed between the groove portion 27 and the groove portion 27.

  Two common pin portions 21a and 29b, which will be described later, are fitted into the common idle groove portion 28. The common idle groove portion 28 has an arc shape formed with a predetermined radius around the output shaft 25, and an arrow range 28a in FIG. 2 indicates a formation range of the common idle groove portion 28. FIG. 2 shows a state where one pin portion 21 a is fitted in the idle groove portion 28.

  As understood from the above description, the first drive groove portion 26 and the second drive groove portion 27 are arranged in the circumferential direction along the arc-shaped outer edge portion of the link plate 23 via the common idle groove portion 28. It is formed continuously with two groove shapes. For this reason, the groove width dimension of the 1st drive groove part 26 and the 2nd drive groove part 27 is the same, and the diameter dimension of the two pin parts 21a and 29b is also the same.

  A pin portion 21 a is integrally provided at the distal end portion of the foot differential door lever 21, and the pin portion 21 a is slidably fitted into the first drive groove portion 26. On the other hand, the face door lever 22 is driven by a link plate 23 via a relay link 29. The relay link 29 is disposed between one plate surface (the plate surface on the case 11 side) of the link plate 23 and the face door lever 22.

  The plate surface of the relay link 29 is integrally provided with two pin portions 29a and 29b protruding in opposite directions from both front and back sides. The first pin portion 29 a is slidably fitted in a “gutter-shaped” engaging groove 22 a formed at the distal end portion of the face door lever 22. The second pin portion 29 b is slidably fitted in the second drive groove portion 27.

  The common idle groove 28 described above is formed in an arc shape with a predetermined radius centered on the output shaft 25. For this reason, when the pin portion 21a of the foot differential door lever 21 or the second pin portion 29b of the relay link 29 is located in the common idle groove portion 28, even if the link plate 23 rotates, the pin is removed from the link plate 23. The driving force is not transmitted to the portions 21a and 29b, and therefore the foot differential door lever 21 and the face door lever 22 do not operate.

  Next, the operation in the above configuration will be described. When the servo motor 24 is energized and the output shaft 25 of the servo motor 24 rotates by a predetermined operating angle, the link plate 23 also rotates together with the output shaft 25 by a predetermined operating angle.

  Due to the rotational displacement of the link plate 23, a driving force is transmitted to the foot differential door lever 21 via the pin portion 21a, and the lever 21 and the foot differential door 19 rotate integrally. At the same time, the driving force is transmitted to the relay link 29 via the pin portion 29 b, and the driving force is transmitted to the face door lever 22 via the relay link 29. Thereby, the face door lever 22 and the face door 20 rotate integrally.

  The face opening 17 is opened and closed by the rotation of the face door 20, and the defroster opening 16 and the foot opening 18 are opened and closed by the rotation of the foot differential door 19. FIG. 1 shows a face mode state in which the face opening 17 is opened by the face door 20 and the communication path 31 to the defroster opening 16 and the foot opening 18 is closed. At this time, the foot differential door 19 closes the defroster opening 16 and opens the foot opening 18.

  By the way, according to the present embodiment, the first and second drive groove portions 26 and 27 are formed to be continuous in the circumferential direction in one groove shape along the arc-shaped outer edge portion of one link plate 23. Therefore, the link plate 23 can be downsized by reducing the radial dimension of the link plate 23.

  This will be described in detail in comparison with the prior art. FIG. 3 shows a prior art similar to Patent Document 1, in which the first drive groove 26 and the second drive groove 27 are arranged in the radial direction of the link plate 23. Since the double arc-shaped portion A aligned with the inner side and the outer side is formed, the radial dimension of the link plate 23 increases and the link plate 23 increases in size.

  On the other hand, in the present embodiment, the first and second drive groove portions 26 and 27 are formed to be continuous in the circumferential direction with one groove shape along the arc-shaped outer edge portion of one link plate 23. Therefore, compared with the prior art of FIG. 3, the radial dimension of the link plate 23 can be reduced by one groove formation, and the link plate 23 can be downsized.

  FIG. 4 shows another prior art, in which the first drive groove portion 26 and the second drive groove portion 27 are spaced apart in the circumferential direction along the arc-shaped outer edge portion of one link plate 23. Formed. With such a groove shape, the circumferential length of the circular arc shape of the link plate 23 becomes very large, and the link plate 23 increases in size.

  On the other hand, in the present embodiment, both the first drive groove portion 26 and the second drive groove portion 27 are formed so as to extend in the circumferential direction along the arc-shaped outer edge portion of the link plate 23, and the first A common idle groove 28 of both the groove portions 26 and 27 is formed between the drive groove portion 26 and the second drive groove portion 27, and this idle groove portion 28 is used for idle operation of the two doors 19 and 20. Can be used in common.

  As a result, the circumferential length of the arc shape of the link plate 23 can be made sufficiently shorter than that of the prior art of FIG. In other words, the circumferential length of the circular arc shape of the link plate 23 of the present embodiment can be shortened to the same extent as the prior art of FIG.

  Thus, according to the present embodiment, both the radial dimension and the circumferential length of the link plate 23 can be reduced, and the link plate 23 can be effectively downsized. As a result, interference between the link plate 23 and peripheral devices can be reduced, and the manufacturing cost of the link plate 23 can be reduced.

  By the way, when the link plate 23 is disposed between the servo motor 24 and the outer surface of the air conditioning unit case 11 as in the present embodiment, the size of the link plate 23 is increased as in the prior art of FIGS. There arises a problem that the link plate 23 interferes with the mounting boss portions 24a to 24c of the servo motor 24.

  In order to solve this problem, a mounting bracket made of a separate member is additionally installed in the servo motor 24, the mounting bracket is arranged so as not to interfere with the link plate 23, and the servo motor 24 is connected to the case 11 via the mounting bracket. You can attach it to. However, if this is done, the servo motor 24 is attached to the case 11 via a mounting bracket made of a separate member, and the servo motor 24 cannot be directly attached to the case 11. Increase in cost due to an increase in manufacturing costs of the mounting bracket.

  On the other hand, in the present embodiment, interference between the link plate 23 and the mounting boss portions 24 a to 24 c of the servo motor 24 can be avoided by downsizing the link plate 23. For this reason, the servo motor 24 can be directly attached to the case 11 without requiring a mounting bracket made of a separate member as described above.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as exemplified below.

  (1) In the above-described embodiment, the common idle groove 28 of both the groove portions 26 and 27 is formed between the first drive groove portion 26 and the second drive groove portion 27 of the link plate 23. The common groove portion may be a groove portion (operating groove portion) that transmits a driving force to the pin portions 21a and 29b instead of the idle groove portion.

  (2) In the above-described embodiment, the link plate 23 is disposed between the servo motor 24 and the outer surface of the air conditioning unit case 11, but the link plate 23 is disposed at a portion of the servo motor 24 on the side opposite to the case. May be. That is, the servo motor 24 may be disposed between the link plate 23 and the outer surface of the air conditioning unit case 11.

  (3) In the above-described embodiment, the relay link 29 is interposed between the link plate 23 and the face door lever 22, but instead of the engaging groove 22 a, the pin portion is integrated at the tip of the face door lever 22. The pin portion of the face door lever 22 may be directly fitted into the second drive groove portion 27 of the link plate 23.

  (4) In the above embodiment, the pin portion 21a of the foot differential door lever 21 is directly fitted into the first drive groove portion 26 of the link plate 23. However, the first portion of the foot differential door lever 21 and the link plate 23 is A relay link similar to the relay link 29 may be interposed between the drive groove portion 26 and the drive groove portion 26.

  (5) In the above-described embodiment, the servo motor 24 is used as the driving device. However, a manual operation mechanism to which the manual operation force of the vehicle occupant (user) is applied may be used instead of the servo motor 24. . That is, the present invention may be applied to a link device that rotates the link plate 23 with a manual operation force.

  (6) In the above embodiment, the example in which the present invention is applied to the operation link mechanism of the blow-out mode doors 19 and 20 in the vehicle air conditioner has been described. It can be widely applied to various uses.

It is sectional drawing of the vehicle air conditioner which shows one Embodiment of this invention. It is a front view of the link apparatus by one Embodiment of this invention. It is a front view of the link apparatus by a prior art. It is a front view of another prior art link device.

Explanation of symbols

11 ... Case, 16 ... Defroster opening (first air passage),
17 ... face opening (second air passage), 18 ... foot opening (first air passage),
19 ... Foot differential door (first door), 20 ... Face door (second door),
21 ... Foot differential door lever (first driven member), 21a ... First pin portion,
22 ... Face door lever (second driven member), 23 ... Link plate,
24 ... Servo motor (drive device), 26 ... First drive groove, 27 ... Second drive groove,
28 ... Common idle groove (common groove), 29 ... Relay lever (second driven member),
29b ... 2nd pin part.

Claims (4)

One link plate (23) rotated by a drive device (24);
A first drive groove (26) and a second drive groove (27) provided in the link plate (23);
A first pin portion (21a) slidably fitted in the first drive groove portion (26), and a second pin portion (slidably fitted in the second drive groove portion (27 )). 29b)
A first driven member (21) that is displaced in accordance with the displacement of the first pin portion (21a);
In a link device provided with the 2nd follower member (29, 22) displaced with displacement of the 2nd above-mentioned pin part (29b),
The link plate (23) is formed in a plate shape having a substantially arc-shaped outer edge,
The first drive groove portion (26) and the second drive groove portion (27) are formed so as to be continuous in the circumferential direction in a single groove shape along the substantially arc-shaped outer edge portion,
A common groove portion in which the first pin portion (21a) and the second pin portion (29b) are fitted together between the first drive groove portion (26) and the second drive groove portion (27). 28) is formed. The common groove portion (28) is an idle groove portion in which the positions of the first pin portion (21a) and the second pin portion (29b) do not change even when the link plate (23) rotates. The link device according to claim 1. The link device according to claim 1 or 2,
A case (11) in which air flows into the passenger compartment;
A first door (19) disposed in the case (11) and opening and closing a first air passage (16, 18) in the case (11);
A second door (20) disposed in the case (11) and opening and closing a second air passage (17) in the case (11);
The first door (19) is opened and closed by the first driven member (21), and the second door (20) is opened and closed by the second driven member (29, 22). Air conditioner. The said drive device is a servo motor (24), The said link plate (23) is arrange | positioned between the outer surface of the said case (11) and the said servo motor (24), The vehicle air conditioner described in 1.

Images