JP4950558B2 - Door operating device for vehicle air conditioning unit - Google Patents

Description

  The present invention relates to a door operating device used for a vehicle air conditioning unit, and more particularly to a door operating device using a gear as a door rotation mechanism.

  The vehicle air conditioning unit is equipped with various doors (air conditioning doors) in order to switch the ventilation path in the unit case. Of these, the mode doors for switching the blowing mode are controlled to be switched via a link-type interlocking mechanism or the like in order to operate some of them in relation to each other.

In the conventional mode door operating device, a lever is attached to each door rotation shaft, a link is connected to the lever, and the link is displaced to change the door position ( For example, see Patent Document 1).
Japanese Utility Model Publication No. 5-49419

  By the way, for example, some mode doors require a switching operation within a large angle range. When such a mode door having a large operating angle is switched by an operating device that combines a link and a lever as in the prior art, the configuration is impossible and layout may become impossible.

  Therefore, it is conceivable to adopt a gear-type door actuator, but the gear-type door actuator is likely to have a large number of parts and a complicated structure in order to maintain the stability of the operation. There's a problem.

  In view of the above circumstances, an object of the present invention is to provide a gear-type door operation device having a simple structure and a stable operation with a small number of parts.

According to the first aspect of the present invention, the air conditioner door rotatably provided on the unit case, the door pivot shaft connected to the air conditioner door, and the input operation for switching the position of the air conditioner door are displaced. In a door operating device for an air conditioning unit for a vehicle, comprising: a link; and an operation transmission mechanism that is provided between the link and the door rotation shaft and transmits the displacement of the link as a rotation displacement to the door rotation shaft. The motion transmission mechanism includes a pinion attached to the door rotation shaft, a rack formed on the link and meshing with the pinion, and the pinion is rotated according to the displacement of the link, and a rack with respect to the pinion in order to regulate the actuation trajectory, between the link and the unit case, and a first guide mechanism provided on at least one of between the link and the door rotation axis, and And second guide mechanism, in the configuration, the first guide mechanism, the link is formed in one of the unit case, regardless of the movement of the link, the rotation center and the rack of the pinion A first guide groove for restricting the movement of the link so that the distance between the two is constant, and a guide pin formed on the other and slidably engaged with the first guide groove, A second guide mechanism is formed on the end of the door rotation shaft and the link, and the end of the door rotation shaft is slidably engaged with the rotation center of the pinion and the rack. And a second guide groove that keeps the distance between them constant .

A second aspect of the present invention, a door operating device for a vehicle air conditioning unit according to claim 1, wherein the air-conditioning door is a mode door for switching the air outlet mode of the conditioned air.

According to the first aspect of the present invention, since the air-conditioning door is rotated by the displacement of the link by using the combination of the pinion and the rack (using a gear), the conventional example in which the air-conditioning door is rotated by the combination of the link and the lever. In contrast, the position of the air-conditioning door can be switched without difficulty over a large angle range. Further, when the link is displaced, the rack operating locus is regulated by the first and second guide mechanisms , so that only the rotational force can be transmitted from the rack to the pinion without difficulty, and the operation of the air conditioning door is stabilized. Can be achieved. Moreover, since the play of the meshing part of the pinion and the rack can be reduced by the restriction by the first and second guide mechanisms , the hysteresis at the time of switching the operation direction can be reduced. In addition, the combination of the rack, pinion, and first and second guide mechanisms allows the operation transmission mechanism to be configured in a simple and compact manner, so that the number of parts can be reduced and the degree of freedom in layout can be increased.

In addition, since the guide groove and the guide pin that are slidably engaged with each other constitute the first guide mechanism that restricts the operation locus of the rack, the structure can be simplified.

Further, by engaging the end of the door rotation shaft with the guide groove on the link side, the distance between the rotation center of the pinion and the rack is kept constant, so that the meshing state of the pinion and the rack is always kept appropriate. It is possible to reduce backlash and hysteresis. In addition, when the end of the door rotation shaft protruding outside the pinion is engaged with the guide groove of the link, the pinion can be prevented from falling due to the meshing reaction force, and the pinion can be rotated smoothly. it can.

According to the second aspect of the present invention, since the present invention is applied to the mode door operating mechanism, the position of the mode door can be switched over a sufficiently large angle range. Therefore, it is possible to respond to a request for proper switching of the blowing mode with a compact configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side sectional view of a vehicle air conditioning unit including the door operation device of the embodiment in the vent mode, FIG. 2 is a side view of the vehicle air conditioning unit in the vent mode so that the combination of links can be seen, and FIG. FIG. 4 is an enlarged view of the operation transmission mechanism portion, FIG. 5 is a side view showing the configuration of the operation transmission mechanism portion and its peripheral portion, and FIG. 5 is a sectional view taken along arrow VI-VI, FIG. 7 is a sectional view taken along arrow VII-VII in FIG. 5, and FIG. 8 is a schematic view of the rear vent passage and foot passage and the front foot outlet in the air conditioner. FIG. 9 is a perspective view showing the rear vent passage and foot passage and the structure of the door provided in each passage, and FIG. 10 is a sectional view of the rear vent passage in the vent mode. 11 is a side sectional view similar to FIG. 1 in the foot mode, FIG. 12 is a side view similar to FIG. 2 in the foot mode, and FIG. 13 is a side sectional view similar to FIG. 1 in the def (defrost) mode. 14 is a side view similar to FIG. 2 in the differential mode, FIG. 15 is a sectional view of the rear vent passage in the differential mode, FIG. 16 is a side sectional view similar to FIG. 1 in the bi-level mode, and FIG. It is a side view similar to FIG. 2 at the time of mode.

  The overall configuration of the air conditioner will be briefly described with reference to FIGS. As shown in FIG. 1, this air conditioner forms a ventilation path in a unit case 10 that can arbitrarily select a path with a door. In the upstream space portion 11 that constitutes the most upstream portion of the ventilation path, the air blowing inlet 20, the filter 21, and the evaporator 22 are arranged in order from the upstream side to the downstream side. A downstream side of the evaporator 22 in the upstream space portion 11 is vertically branched into a cool air side passage 12 and a warm air side passage 13, and a slide type air mix door 25 is disposed at the branch portion.

  This slide type air mix door 25 is a door that adjusts the opening ratio of the cool air side passage 12 and the warm air side passage 13, and is slid by the drive mechanism 26, and when the cool air side passage 12 is open. The cold air (arrow R1 in FIG. 1) that has passed through the evaporator 22 passes through the cold air passage 12 and flows downstream as it is. Further, when the hot air side passage 13 is open, the cold air that has passed through the evaporator 22 is heated by passing through the heater core 23 and flows downstream as hot air. Since FIG. 1 shows the state in the vent mode, no wind flows through the heater core 23.

  An air mix space 14 is provided in the downstream portion of the cool air side passage 12 and the warm air side passage 13 to mix the cool air and the warm air flowing through the cool air side passage 12 and the warm air side passage 13, respectively. A front vent outlet 31, a foot outlet 32, and a differential outlet 33 are provided facing the air mix space. A vent door 31A, a foot door 32A, and a differential door 33A are provided in the vent outlet 31, the foot outlet 32, and the differential outlet 33, respectively, and the vent door 31A communicates with the passage immediately after the heater core 23 and the air mix space 14. Also plays the role of opening and closing the part.

  The vent door 31A, the foot door 32A, and the differential door 33A are connected to the vent door rotating shaft 31B, the foot door rotating shaft 32B, and the differential door rotating shaft 33B, respectively, and by rotating these door rotating shafts 31B, 32B, and 33B. The door position can be switched.

  A bypass passage 15 is provided below the warm air passage 13 where the heater core 23 is disposed, and guides the cool air (arrow R2 in FIG. 1) that has passed through the evaporator 22 to a rear vent passage 36 and a foot passage (described later). ing. The bypass passage 15 merges with the warm air passage 13 before branching to a rear vent passage 36 and a foot passage (described later), and a rotating air mix door 27 is provided in the merge space 16. The air mix door 27 is connected to an air mix door rotation shaft 27B, and the door position is adjusted by rotating the air mix door rotation shaft 27B.

  FIGS. 8 and 9 show the position of the front-side foot outlet 32 and the positions of the rear vent passage 36 and the foot passage 37. As shown in FIG. 8, the front-side foot outlets 32 are disposed on both sides of the unit case 10, and are located on both outer sides of the cool air side passage 12. Further, as shown in FIG. 9, the rear vent passage 36 and the foot passage 37 are arranged at the same position when viewed from the side, the rear vent passage 36 is arranged at the center, and the foot passages 37 are arranged on both sides thereof. A rear vent door (air conditioning door) 36A is disposed in the rear vent passage 36, and a rear foot door (air conditioning door) 37A is disposed in the foot passage 37. The rotation shaft 36B of the rear vent door 36A and the rotation shaft 37B of the rear foot door 37A are provided on a coaxial door rotation shaft 40. The door rotation shaft 40 as a common shaft is rotatably supported by the unit case 10, and one end of the door rotation shaft 40 protrudes from the unit case 10 to the outside. And the pinion 41 as a to-be-rotated drive member is provided in the protrusion end.

  As shown in FIG. 2, operating mechanisms 31C, 32C, and 33C including levers and links are connected to the door rotation shafts 31B, 32B, and 33B of the front mode door (the vent door 31A, the foot door 32A, and the differential door 33A). One end of each operating mechanism 31C, 32C, 33C is engaged with a mode switching link 60 that is driven to rotate about the drive shaft 61. Then, by rotating the mode switching link 60, the blowing mode is set to any one of the vent mode (VENT), the foot mode (FOOT), the differential mode (DEF), and the bi-level mode (BI-LEVEL). The door positions of the vent door 31A, the foot door 32A, and the differential door 33A can be switched.

  The mode switching link 60 is engaged with one end (upper end in the figure) 51 of a link 50 for driving each mode door on the rear side. The link 50 extends in the vertical direction. When the mode switching link 60 is rotated for mode switching, the link 50 is mainly displaced in the vertical direction according to the input operation.

  As shown in FIGS. 3 and 4, the lower end 52 of the link 50 is connected to the door rotation shaft 40 via a gear-type motion transmission mechanism 100, and when the link 50 is displaced in the vertical direction, the link 50 moves. The transmission mechanism 100 transmits the displacement as a rotational displacement to the door rotational shaft 40, whereby the positions of the rear vent door 36A and the rear foot door 37A are switched.

  Here, the rear vent door 36A and the rear foot door 37A, the door rotation shaft 40 provided as a common shaft for the rear side door, the link 50 for driving the rear side door, and the displacement of the link 50 are the door rotation shaft 40. The mode transmission device 100 on the rear side is configured by the motion transmission mechanism 100 that transmits the rotational displacement to the rear side.

  The motion transmission mechanism 100 in this case includes a pinion 41 attached to the door rotation shaft 40, a rack 53 that is formed on the link 50 and meshes with the pinion 41, and rotates the pinion 41 according to the displacement of the link 50. The first guide mechanism 101 provided between the link 50 and the unit case 10 and the link 50 and the door rotation shaft 40 are provided in order to regulate the operation locus of the rack 53 with respect to the pinion 41. And a second guide mechanism 102.

The first guide mechanism 101 has a first guide groove 54 formed in the lower end 52 of the link 50 along the vertical direction, and is fixed to the unit case 10 so as to be slidable in the first guide groove 54. And an engaged guide pin 44. Note that the first guide groove 54 has an operation locus of the rack 53 that is appropriate for the pinion 41 regardless of the movement of the link 50 (mainly in the vertical direction) (that is, the rotation center of the pinion 41 and the rack 53). Is formed with a path that can regulate the movement of the link 50. Further, as shown in FIG. 7, a drop-off preventing screw 45 is screwed into the head of the guide pin 44.

Further, as shown in FIG. 6, the second guide mechanism 102 is formed on the end portion 42 of the door rotation shaft 40 (the convex portion of the end surface of the pinion 41 and the link 50, and the end of the door rotation shaft 40. The portion 42 is slidably engaged to form a second guide groove 56 that maintains a constant distance between the rotation center of the pinion 41 and the rack 53. This second guide groove. 56 is formed on the back surface of a pinion cover 55 with a window 59 extending to the lower end 52 of the link 50.

  Next, the operation will be described.

  In the vent mode, the mode switching link 60 rotates as shown in FIG. 2, and the front vent door 31A, foot door 32A, and differential door 33A are positioned as shown in FIG. At the same time, the rear vent door 36A and the rear foot door 37A are positioned by the displacement of the link 50. Thereby, the blowing in the vent mode is performed.

  In the foot mode, the mode switching link 60 rotates as shown in FIG. 12, and the front vent door 31A, foot door 32A, and differential door 33A are positioned as shown in FIG. At the same time, the rear vent door 36A and the rear foot door 37A are positioned by the displacement of the link 50. Thereby, the balloon in the foot mode is performed.

  In the differential mode, the mode switching link 60 rotates as shown in FIG. 14, and the front vent door 31A, the foot door 32A, and the differential door 33A are positioned as shown in FIG. At the same time, as the link 50 is displaced, the rear vent door 36A and the rear foot door 37A are positioned as shown in FIG. Thereby, the balloon in the differential mode is performed.

  In the bi-level mode, the mode switching link 60 rotates as shown in FIG. 17, and the front vent door 31A, foot door 32A, and differential door 33A are positioned as shown in FIG. At the same time, the rear vent door 36A and the rear foot door 37A are positioned by the displacement of the link 50. As a result, the balloon is blown out in the differential mode.

  Thus, in the rear side door operating device of the vehicle air conditioning unit of the above embodiment, the rear vent door 36A and the rear foot door 37A are formed by the displacement of the link 50 by the combination of the pinion 41 and the rack 53 (using gears). Therefore, unlike the conventional example in which the air conditioning door is rotated by a combination of a link and a lever, the positions of the doors 36A and 37A can be switched without difficulty over a large angle range.

  Further, when the link 50 is displaced, the operation trajectory of the rack 53 is restricted by the guide mechanisms 101 and 102, so that only the rotational force can be transmitted from the rack 53 to the pinion 41 without difficulty, and the air conditioning door (rear vent door 36A, The operation of the rear foot door 37A) can be stabilized.

  Moreover, since the play of the meshing part of the pinion 41 and the rack 53 can be reduced by the restriction by the guide mechanisms 101 and 102, the hysteresis at the time of switching the operation direction can be reduced.

  Further, the combination of the rack 53, the pinion 41, and the guide mechanisms 101 and 102 allows the motion transmission mechanism 100 to be configured simply and compactly, so that the number of parts can be reduced and the degree of freedom in layout can be increased.

Further, in the second guide mechanism 102, the end portion 42 of the door rotation shaft 40 protruding outside the pinion 41 is engaged with the second guide groove 56 of the link 50, so that the pinion 41 due to the meshing reaction force is engaged. Can be prevented, and the rotation of the pinion 41 can be made smooth.

In the above embodiment, the first guide groove 54 is formed on the link 50 side and the guide pin 44 is provided on the unit case 10 side.

It is a sectional side view at the time of the vent mode of the air conditioning unit for vehicles including the door actuator of embodiment of this invention. It is a side view at the time of the vent mode of the vehicle air conditioning unit shown so that the combination of a link may be understood. It is a schematic diagram which shows the principle structure of the principal part of a door actuator for a rear side. It is an enlarged view of the operation | movement transmission mechanism part. It is a side view which shows the structure of the operation | movement transmission mechanism part and its peripheral part. , It is VI-VI arrow sectional drawing of FIG. It is VII-VII arrow sectional drawing of FIG. It is a front view which shows roughly the position of the rear side vent passage and foot passage in the air conditioner, and the front foot outlet. It is a perspective view which shows the structure of the door with which the rear side vent channel | path and foot channel | path and each channel | path are equipped. It is sectional drawing of the rear vent channel | path at the time of vent mode. It is side sectional drawing similar to FIG. 1 at the time of foot mode. It is a side view similar to FIG. 2 at the time of foot mode. FIG. 2 is a side sectional view similar to FIG. 1 in a differential (defrost) mode. It is a side view similar to FIG. 2 at the time of differential mode. It is sectional drawing of the rear vent channel | path at the time of differential mode. It is a sectional side view similar to FIG. 1 at the time of bilevel mode. FIG. 3 is a side view similar to FIG. 2 in the bi-level mode.

Explanation of symbols

10 Unit case 36A Rear vent door (air conditioning door)
37A Rear foot door (air conditioning door)
40 Door rotation shaft 41 Pinion 42 End portion of door rotation shaft 44 Guide pin 50 Link 53 Rack
54 First guide groove
56 Second guide groove 100 Motion transmission mechanism
101 First guide mechanism
102 Second guide mechanism

Claims (2)

An air conditioning door (36A, 37A) rotatably provided on the unit case (10);
A door rotation shaft (40) connected to the air conditioning door (36A, 37A);
A link (50) that is displaced in response to an input operation for switching the position of the air conditioning door (36A, 37A);
An operation transmission mechanism (100) provided between the link (50) and the door rotation shaft (40) and transmitting the displacement of the link (50) to the door rotation shaft (40) as a rotation displacement;
In a door operating device of a vehicle air conditioning unit comprising:
The motion transmission mechanism (100) is
A pinion (41) attached to the door pivot shaft (40);
A rack (53) that is formed on the link (50), meshes with the pinion (41), and rotates the pinion (41) according to the displacement of the link (50);
Between the link (50) and the unit case (10) and between the link (50) and the door rotation shaft (40) in order to regulate the operation locus of the rack (53) with respect to the pinion (41). A first guide mechanism (101) and a second guide mechanism (102) provided on at least one of
Consisting of
The first guide mechanism (101)
A distance formed between the rotation center of the pinion (41) and the rack (53) regardless of the movement of the link (50), formed on one of the link (50) and the unit case (10). A first guide groove (54) for restricting the movement of the link (50) so that is constant,
A guide pin (44) formed on the other side and slidably engaged with the first guide groove (54),
The second guide mechanism (102)
An end (42) of the door pivot shaft (40);
Formed on the link (50), the end (42) of the door rotation shaft (40) is slidably engaged so that the rotation center of the pinion (41) and the rack (53) A second guide groove (56) that keeps the distance between them constant;
A door operating device for an air conditioning unit for a vehicle, comprising: It is a door operation device of the air-conditioning unit for vehicles according to claim 1 ,
The door operating device for an air conditioning unit for a vehicle, wherein the air conditioning door is a mode door (36A, 37A) for switching an air blowing mode.

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