JP2004058788A - Gear device for vehicle air conditioning unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear device in which a gear to be not installed to a switching door is produced at a low cost and generation of a noise caused by floating of the gear and leakage of air in a unit case are prevented. <P>SOLUTION: The gear device 15 is constituted by being provided with a first link gear 16 installed on the first switch door 10 making a wall part of the unit case 2 as a border; a third link gear 18 installed on the second switch door 11; and a second link gear 20 engaged with the first link gear 16 and the third link gear 18. Shaft parts 17, 19 of the first link gear and the third link gear 18 are provided at the unit case 2 side and flange parts 161, 181 having a larger diameter than that of a tooth part are formed on an end surface at the opposite side to the shaft part 17, 19. Thereby, the end surface of the second link gear 20 engaged with the first link gear 16 and the third link gear 18 is pressed and an axial movement of the second link gear 20 is restricted. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gear device provided in a vehicle air conditioning unit, and more particularly, to at least a first gear and a first gear mounted on an actuated body disposed in a unit case via a wall of the unit case. The present invention relates to a gear device for a vehicle air-conditioning unit including a second gear meshed with a gear.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an air conditioning unit of a vehicle, for example, a ventilation switching door in an air conditioning distribution device is rotatably disposed by rotating a link gear to switch any of a plurality of outlets to be capable of blowing air. ing. A plurality of switching doors are arranged, and each switching door is arranged such that a link gear mounted on each switching door is meshed with each other via an intermediate link gear in order to be operated by one drive source. Have been.
[0003]
As shown in FIGS. 8 and 9, the conventional gear device 81 is disposed so as to be mounted on one end of each of the switching doors 91 and 92 with the unit case 82 interposed therebetween. Pin portions 93, 94 are integrally attached to one ends of the switching doors 91, 92. The pin portions 93, 94 are inserted into insertion holes 82a, 82a formed in the unit case 82, and the link gears 83, 84 The claw portions 83b and 84b formed on the shaft portions 83a and 84a are inserted so as to engage with the pin portions 93 and 94 of the switching doors 91 and 92.
[0004]
8, the first link gear 83 is mounted on the first switching door 91, the third link gear 84 is mounted on the second switching door 92, and meshes with the second link gear (intermediate link gear) 86, respectively. ing. The second link gear 86 has a shaft portion 86a and a claw portion 86b at the tip. Then, the shaft portion 86a of the second link gear 86 is inserted into the insertion hole 82b formed in the unit case 82, the claw portion 86b is switched to protrude toward the door side, and the unit case 82 is engaged with the claw portion 86b. The gear device 81 is configured to support the second link gear 86. Accordingly, the hook 86b of the shaft 86a of the second link gear 86 is engaged with the unit case 82, thereby preventing the second link gear 86 from falling off the unit case 82.
[0005]
[Problems to be solved by the invention]
However, in the conventional gear device 81, since the shaft portion 86a of the second link gear 86 forms the claw portion 86b, the shape is complicated, which leads to an increase in cost. When the three link gears 84 are formed of a resin material, the shaft parts 83a, 84a of the link gears 83, 84 are inserted when the respective link gears 83, 84 are inserted into the unit case 82 due to variations in accuracy. Are not always arranged in parallel. In this case, the rotation of the first link gear 83 and the third link gear 84 causes the second link gear 86 to float, thereby causing abnormal noise. Further, since the shaft portion 86a of the second link gear 86 passes through the insertion hole 82b in the unit case 82, air leaks from the insertion hole 82b opened in the unit case 82.
[0006]
SUMMARY OF THE INVENTION The present invention solves the above-described problems, and a gear device for a vehicle air-conditioning unit that can prevent floating of an intermediate gear and dropping out of a unit case with a configuration that does not require cost, and that can also prevent air leakage in the unit case. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the gear device for a vehicle air-conditioning unit according to the present invention, in the invention described in claim 1, the first gear mounted on the operated body and the second gear meshed with the first gear are The second gear is supported by a unit case, and the second gear is arranged so as to be held by a gear holding means formed on the first gear so as to restrict movement in the axial direction.
[0008]
Thus, when the first gear rotates, the second gear is held by the gear holding means formed on the first gear so as to restrict the movement in the axial direction. No holding means for restricting the movement of the second gear in the axial direction can be formed, the second gear having a simple shape can be formed, the cost can be reduced, and the second gear can be removed from the unit case. Can be prevented.
[0009]
According to the invention described in claim 2, the gear holding means is formed by a flange portion having a larger diameter than a tooth portion formed on the first gear, so that the second gear and the flange portion of the first gear are united. It can be sandwiched by the wall of the case. Therefore, when the first gear rotates, the movement of the second gear in the axial direction can be restricted by the flange of the first gear and the wall of the unit case, so that the claw portion is formed on the second gear. It is possible to reduce costs and prevent the second gear from floating, thereby preventing abnormal noise.
[0010]
According to the third aspect of the present invention, since the second gear is supported by the shaft formed in the unit case, it is only necessary to form a hole for inserting the second gear into the shaft. It can be manufactured in an easy shape. Therefore, the cost can be reduced without forming the shaft portion having the claw portion on the second gear as in the related art, and further, the shaft portion of the second gear is inserted through the wall portion of the unit case. Since no hole is formed, it is possible to prevent air leakage flowing from the inside of the unit case through the hole for the shaft portion of the second gear to the outside.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0012]
INDUSTRIAL APPLICABILITY The gear device of the present invention is suitably used as a gear device for rotating a switching door in a vehicle air conditioning and air distribution device, and in particular, a gear device configured to arrange an intermediate gear to transmit driving. It is desirable to use it. Of course, other than the air-conditioning air distribution device, the air-conditioning device using the gear device is not limited to the following embodiment.
[0013]
FIG. 1 is a side view of an air-conditioning air distribution device 1 according to one embodiment. The air-conditioning air distribution device 1 includes an evaporator chamber 3, a heater core chamber 4, and an air mix chamber 5 arranged in a unit case 2. It is configured. In the air mix chamber 5, three outlets 7 are arranged, and a first switching door 10 for switching between a first outlet 7A and a second outlet 7B, and a third outlet 7C are opened and closed. A second switching door 11 is disposed.
[0014]
A first link gear 16 is mounted on one end of the first switching door 10, and a third link gear 18 is mounted on one end of the second switching door 11, and the first link gear 16 and the third link gear 18 are intermediate. A gear (hereinafter, referred to as a second link gear) 20 meshes with the gear 20 to constitute a gear device 15 of the first embodiment. The rotation of the gear device 15 is transmitted via the second link gear 20 by rotation of the first link gear 16, the second link gear 20, or the third link gear 18.
[0015]
As shown in FIGS. 2 and 3, the first link gear 16 is disposed outside the unit case 2 with the unit case 2 interposed at one end of the first switching door 10, and a shaft portion 17 protruding into the unit case 2. It has. A claw portion 171 having a flared engagement surface 172 is disposed at the tip of the shaft portion 17. On the other hand, at one end of the first switching door 10, a pin portion 101 integrally formed with the first switching door 10 is arranged.
[0016]
The pin portion 101 is inserted into an insertion hole 2 a formed in the unit case 2, and the shaft portion 17 of the first link gear 16 is inserted into the concave portion 101 a formed in the pin portion 101, so that the claw of the shaft portion 17 is formed. The first switching door 10 and the first link gear 16 are connected by engaging the pin portion 101 at the portion 171.
[0017]
Further, the first link gear 16 is formed with a flange 161 having a diameter larger than that of the teeth on the end face opposite to the shaft 17.
[0018]
The third link gear 18 is disposed outside the unit case 2 with the unit case 2 therebetween under the second switching door 11, and includes a shaft portion 19 protruding into the unit case 2. A claw portion 191 having a flared engagement surface 192 is disposed at the tip of the shaft portion 19. On the other hand, at one end of the second switching door 11, a pin portion 111 integrally formed with the second switching door 11 is arranged.
[0019]
The pin portion 111 is inserted into an insertion hole 2 b formed in the unit case 2, and the shaft portion 19 of the third link gear 18 is inserted into a concave portion 111 a formed in the pin portion 111, so that a claw of the shaft portion 19 is formed. The second switching door 11 and the third link gear 18 are connected by engaging the pin portion 111 at the portion 191.
[0020]
Further, the third link gear 18 is formed with a flange 181 having a diameter larger than that of the teeth on the end face opposite to the shaft 19.
[0021]
The second link gear 20 is meshed with the first link gear 16 and the third link gear 18, and is rotatable around a shaft 2c formed in the unit case 2 with a hole 201 formed in the shaft. Is fitted. The second link gear 20 has one end face pressed by the flange 161 of the first link gear 16 and one end face pressed by the flange 181 of the third link gear 18 so that the unit case 2 and the first link gear 16 The movement in the axial direction between the flange 161 of the third link gear 18 and the flange 161 of the third link gear 18 is regulated.
[0022]
Therefore, by disposing the gear device 15 in the unit case 2, one of the first switching door 10 and the second switching door 11 is rotationally driven, and the other switching door 10 or 11 is interlocked via the gear device 15. To rotate.
[0023]
The flange 161 formed on the first link gear 16 and the flange 18 formed on the third link gear 18 may be formed integrally with the teeth, respectively, or a disk-shaped member may be formed separately. And may be integrally attached. Further, the flange portions 161 and 181 may be formed in a disk shape or a ring shape. In any case, the outer peripheral surface may be formed to have a larger diameter than the tooth portion on the end surface opposite to the wall of the unit case 2 so that the end surface of the second link gear 20 can be restricted from moving in the axial direction.
[0024]
The outer peripheral surfaces of the flange portions 161 and 181 may not be arc-shaped but may be wavy, and are formed in two steps in the same shape as the tooth portions of the first link gear 16 and the third link gear 18. Is also good.
[0025]
Next, the operation of the gear device 15 will be described including the operation of the air conditioning and air distribution device 1.
[0026]
As shown in FIG. 1, when the cool air or warm air that has passed through the evaporator chamber 3 or the heater core chamber 4 is sent to the air mix chamber 5, the first outlet 7A or the second outlet 7B, or the third outlet 7B. The air is blown into the vehicle interior from one of the air outlets of the air outlet 7C.
[0027]
At this time, the first switching door 10 and the second switching door 11 are selectively rotated to open each outlet. For example, when air is blown to the first outlet 7A, the first switching door 10 is rotated clockwise in FIG. 1 to open the first outlet 7A and shut off the second outlet 7B. I do. The rotation of the first switching door 10 is performed either by operating an operation lever in the vehicle compartment or by operating a servomotor by sensing the temperature in the vehicle compartment.
[0028]
By rotating the first switching door 10 clockwise, the first link gear 16 rotates clockwise in FIG. 1, the second link gear 20 rotates counterclockwise, and the third link gear 18 rotates clockwise in conjunction with the first link gear 16. When the third link gear 8 rotates clockwise, the second switching door 11 rotates clockwise, and shuts off the third outlet 7C. As a result, the cool air or warm air or the mixed air of the cooler and warm air blown into the air mix chamber 5 is blown into the vehicle interior from the first outlet 7A.
[0029]
Also, when air is blown out to the second blowout port 7B or the third blowout port 7C, the first switching door 10 or the second switching door 11 is rotated so as to shut off the other blowout ports. Then, the first switching door 10 and the second switching door 11 are operated by the gear device 15 so as to be interlocked.
[0030]
When the gear device 15 is operated, the second link gear 20 may be raised with respect to the unit case 2 by the torque of the first link gear 16 or the third link gear 18 being applied. However, as shown in FIG. 2, the second link gear 20 is pressed by the flange 161 of the first link gear 16 or the flange 181 of the third link gear 18 so that the flange 161 or 181 and the unit case 2 Since it is sandwiched between the first and second walls, the movement in the axial direction is restricted and the floating is prevented.
[0031]
As described above, according to the gear device 15 of the first embodiment, the first link gear 16 or the third link gear 18 is formed with the flange portions 161 and 181 each having a diameter larger than the tooth portion. Since one end of the second link gear 20 is pressed by 161 and 181, the rotation of the first link gear 16 or the third link gear 18 is transmitted to the second second link gear 20, and the first link gear 20 is rotated. When transmitting the rotational drive to the second link 16 or the third link gear 18, the axial movement between the flange 161 of the first link gear 16 or the flange 181 of the third link gear 18 and the wall of the unit case 2 is performed. As a result, the lifting of the second link gear 20 can be prevented, and the generation of abnormal noise can be prevented.
[0032]
Moreover, since the second link gear 20 is formed with the hole 201 into which the shaft 2c of the unit case 2 is inserted, it is not necessary to provide a claw having a complicated shape as the shaft as in the related art. Since the parts can be manufactured in various shapes, the cost can be reduced, and since the insertion holes are not made in the unit case 2, air leaking from around the second link gear 20 to the outside can be prevented.
[0033]
Next, the gear device 30 of the second embodiment uses a second link gear 31 having a shaft portion 32 through which the unit case 2 is inserted, as shown in FIG. In this embodiment, an insertion hole 2d through which the shaft portion 32 of the second link gear 31 is inserted is formed in the unit case 2, and the shaft portion 32 of the second link gear 31 is inserted so as to be rotatably supported. . The first link gear 16 and the third link gear 18 meshing with the second link gear 31 are formed with flanges 161 and 181 in the same manner as the gear device 15 of the first embodiment. 31 is arranged so as to press one end surface thereof.
[0034]
Therefore, similarly to the first embodiment, it is possible to prevent the second link gear 31 from being lifted up, thereby preventing the generation of abnormal noise.
[0035]
In this embodiment, air leakage is caused by forming the insertion hole 2d through which the shaft portion 32 of the second link gear 31 is inserted in the unit case 2, but the shaft portion through which the unit case 2 is inserted. It is desirable to dispose sealing members on both front and rear sides of the 32 unit cases 2 to prevent air leakage.
[0036]
Further, in the gear device 40 of the third embodiment, as shown in FIG. 5, a flange portion 182 is provided on either the first link gear 16 or the third link gear 18 for regulating the axial direction of the second link gear 20. ing. In this case, the flange formed on one of the link gears I6, 18 has a larger diameter than the flanges 161 and 181 formed in the first embodiment. Therefore, in this embodiment, the cost of parts is reduced because the collar is one of the first link gear 16 or the third link gear 18 provided with the flange portion.
[0037]
It should be noted that the gear device of the present invention does not arrange the second link gear not connected to the switching door between the first link gear and the third link gear connected to the switching door as in the above-described embodiment. Alternatively, it may be constituted simply by a pair of a first link gear connected to the switching door and a second link gear not connected to the switching door, or two second link gears not connected to the switching door may be meshed. The first link gear connected to the switching door, the one second link gear not connected to the switching door, and the other second link gear and the third link gear connected to the switching door are arranged in this order. You may. In this case, the switching door connected to the first link gear and the switching door connected to the third link gear rotate in opposite directions.
[0038]
In any case, the first link gear and the third link gear connected to the switching door are formed with a flange partly covering one end surface of the second link gear so as to regulate the floating of the second link gear. .
[0039]
Further, the gear device of the present invention is not limited to connection between gears, and can be applied to another transmission mechanism having a link member. For example, as shown in FIGS. 6 and 7, the gear device 50 of the fourth embodiment meshes with the first link gear 51 connected to the switching door 60 with the unit case 61 interposed therebetween. And a link member 52 having a tooth portion 53. The link member 52 is rotatably supported by a shaft portion 62 protruding from the unit case 61, and a long link portion 54 is formed on the opposite side of the tooth portion 53. Is formed with a hole 55 for pivotally supporting one end of a rod member 56. The rod member 56 is connected to, for example, an operation lever operated in a vehicle cabin. Then, the tip of the rod member 56 is moved up and down by operating the operation lever. Then, the link portion 54 of the link member 52 that has pivotally supported the distal end of the rod member 56 by the hole portion 55 is pivoted about the shaft portion 62 of the unit case 61 to rotate the tooth portion 53 in either direction. Then, the first link gear 51 is rotated in either direction. As a result, the switching door is operated to open or close the outlet.
[0040]
Also in this embodiment, since the first link gear 51 is formed with the flange portion 511 so as to cover one end surface of the tooth portion 53 of the link member 52, the link member 52 is formed by the flange portion of the first link gear 51. It can be arranged so as to be sandwiched between 511 and the wall of the unit case 61, so that the lifting of the link member 52 in the axial direction can be restricted to prevent generation of abnormal noise. In addition, since the link member 52 has the shaft portion 62 serving as the center of rotation as the shaft portion 62 of the unit case 61, the cost of parts can be reduced without printing in a complicated shape. Since no holes are formed in the holes, air leakage can be prevented.
[Brief description of the drawings]
FIG. 1 is a simplified side cross-sectional view showing one form of an air-conditioning air distribution device in which a gear device is arranged.
FIG. 2 is a sectional view showing a gear device according to an embodiment of the present invention.
FIG. 3 is a view taken in the direction of arrow A in FIG. 2;
FIG. 4 is a sectional view showing another embodiment of the gear device.
FIG. 5 is a sectional view showing another embodiment of the gear device.
FIG. 6 is a sectional view showing another form of the gear device.
FIG. 7 is a view as seen from the arrow B in FIG. 6;
FIG. 8 is a sectional view showing a conventional gear device.
FIG. 9 is a view as viewed in the direction of arrow C in FIG. 8;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air-conditioning air distribution apparatus 2 Unit case 2c Shaft 10 First switching door 101 Pin 11 Second switching door 111 Pin 15 Gear 16 First link gear 161 Flange 17 Shaft 171 Claw 18 Second link gear 181 Flange 19 Shaft 191 Claw 20 Second link gear (second gear)
201 hole

Claims (3)

At least a first gear attached to an actuated body disposed in a unit case via a wall of the unit case, and a second gear meshed with the first gear, wherein the first gear and the first gear A second gear and a gear device for a vehicle air conditioning unit configured to be supported by the unit case,
The second gear may be held by a gear holding means formed on the first gear and configured to restrict axial movement of the second gear toward the wall of the unit case. Gear device for a vehicle air conditioning unit. The gear device for a vehicle air-conditioning unit according to claim 1, wherein the gear holding means is formed by a flange portion having a larger diameter than a tooth portion formed on the first gear. The gear device for a vehicle air conditioning unit according to claim 1 or 2, wherein the second gear is supported by a shaft formed in a unit case.

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