JP6773592B2 - Vehicle air conditioner - Google Patents

Description

The present invention relates to a vehicle air conditioner that is mounted on a vehicle and whose temperature has been adjusted by a heat exchanger to be blown into the vehicle interior to adjust the temperature inside the vehicle interior.

Conventionally, a vehicle air conditioner mounted on a vehicle takes in inside air and outside air into an air conditioner case having an air passage inside by a blower, and the air cooled by an evaporator which is a cooling means and a heater core which is a heating means. After mixing the air heated by the air conditioner in a desired mixing ratio by operating each damper in the air conditioner case, the air is blown into the vehicle interior through a plurality of air outlets provided in the air conditioner case. The temperature and humidity inside the vehicle interior are adjusted.

In such a vehicle air conditioner, for example, as disclosed in Patent Document 1, a drive motor is fixed to a side wall along the width direction of the air conditioner case via a mounting boss, and a main link is attached to the drive shaft. A face link, a defroster link, and a foot link are respectively engaged with a plurality of guide grooves that are connected and formed in the main link.

This face link is connected to the rotation axis of the face door, the defroster link is connected to the rotation axis of the defroster door, and the foot link is connected to the rotation axis of the foot door.

Then, when the main link rotates under the driving action of the drive motor, the face link, the defroster link, and the foot link engaged with the guide groove rotate in a predetermined direction to open and close the face door, the defroster door, and the foot door, respectively. Make it work.

Japanese Unexamined Patent Publication No. 2001-80347

In the vehicle air conditioner of Patent Document 1 described above, the drive shaft of the drive motor is fitted into a mounting hole opened at the center of the main link and integrally connected. For example, this fitting is caused by some reason. There is a problem that the main link will drop if it comes off.

The present invention has been made in consideration of the above problems, and an object of the present invention is to provide an air conditioner for a vehicle capable of reliably fixing a link member to a drive source and preventing it from falling off. ..

In order to achieve the above object, the present invention has an air conditioning case having a flow path for air, a blower provided inside the air conditioning case to send air to the flow path, and a flow path provided inside the air conditioning case. In a vehicle air conditioner equipped with a heat exchanger that exchanges heat with the air flowing through the air conditioner, a damper that changes the flow rate of air flowing through the flow path, and a drive source that drives the damper.
A link member that is connected to the drive shaft of the drive source and transmits the drive force to the damper,
A holder provided between the drive source and the link member to hold the drive source and the link member with respect to the air conditioning case.
With
The link member is rotatably supported by the holder, and has a first regulating part that regulates relative movement in the axial direction with respect to the holder.
The second regulation part that regulates the relative movement in the axial direction with respect to the drive shaft,
Have a,
The first regulating portion is a first fitting portion formed in an insertion portion to be inserted into the hole portion of the holder and fitted to the first fitting portion formed in the hole portion, and is a second regulating portion. The portion is a second fitting portion formed in the shaft hole portion into which the drive shaft is inserted inside the insertion portion and fitted to the second fitting portion formed on the outer peripheral surface of the drive shaft. It is characterized by that.

According to the present invention, a link member that transmits a driving force to a damper is connected to a drive shaft of a drive source that constitutes a vehicle air conditioner, and the drive source and the link member are held by the air conditioner case. A holder is provided between the drive source and the link member. The link member includes a first regulating unit that regulates relative movement in the axial direction with respect to the holder, and a second regulating unit that regulates relative movement in the axial direction with respect to the drive shaft. Further, the first regulating portion is a first fitting portion formed in an insertion portion to be inserted into the hole portion of the holder and fitted to the first fitting portion formed in the hole portion. The second fitting portion is formed in the shaft hole portion into which the drive shaft is inserted inside the insertion portion, and is fitted to the second fitting portion formed on the outer peripheral surface of the drive shaft. Is.

Therefore, the link member is prevented from falling off in the axial direction by the first regulating portion while being rotatably supported by the holder, and is connected to the drive shaft of the drive source by the second regulating portion. Prevents it from falling off in the axial direction. As a result, the link member can be easily connected by assembling to the drive shaft and the holder of the drive source, and even when the regulation state in the axial direction of either the first or second regulation unit is released. The other regulating section can reliably prevent the link member from falling off from the drive source.

Furthermore, it is preferable that the fitted portion is a concave portion recessed in the radial direction, and the fitting portion is a convex portion that protrudes in the radial direction and is inserted into the concave portion.

According to the present invention, the following effects can be obtained.

That is, it is provided with a link member that is connected to the drive shaft of the drive source and transmits the driving force to the damper, and the relative movement of this link member in the axial direction with respect to the holder held in the air conditioning case is regulated by the first regulation unit. Since the relative movement in the axial direction with respect to the drive shaft is regulated by the second regulation unit, the link member can be easily connected by assembling to the drive shaft and holder of the drive source, and moreover, the first and second are used. Even if the regulation state in the axial direction of any one of the regulation parts is released, the other regulation part can surely prevent the link member from falling off to the drive source.

It is an overall side view of the vehicle air conditioner which concerns on embodiment of this invention. It is an overall front view of the vehicle air conditioner shown in FIG. It is an enlarged sectional view of the vicinity of an actuator in the vehicle air conditioner shown in FIG. It is sectional drawing along the IV-IV line of FIG.

A preferred embodiment of the vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a vehicle air conditioner according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the vehicle air conditioner 10 cools the air conditioner case 12 constituting each air passage, the blower 14 arranged inside the air conditioner case 12, and the air. Evaporator (heat exchanger) 16 to be used, a heater core (heat exchanger) 18 to heat the air, a damper mechanism 20 to switch the flow of air flowing in each of the passages, and an actuator to drive the damper mechanism 20. It includes a holder 24 that holds the drive source) 22 and a link mechanism 26 that is supported by the holder 24 and transmits a driving force to the damper mechanism 20.

The air conditioning case 12 is composed of, for example, the first and second divided cases 28 and 30 having a substantially symmetrical shape, and the first and second divided cases 28 and 30 are in the width direction of the vehicle (in the direction of arrow A in FIG. 2). It is provided so that it can be divided into two parts. Above the air conditioning case 12, a vent air vent 32 that blows air near the face of the occupant and a defroster air port 34 that blows air near the front window of the vehicle are opened adjacent to each other.

Further, the air conditioning case 12 is formed with a blower mounting portion 36 recessed inward in the width direction at a position below the vent blower port 32 and the defroster blower port 34. The blower mounting portion 36 is formed with a predetermined width from the boundary portion between the first split case 28 and the second split case 30, and a mounting hole 38 for mounting the blower 14 is opened at the center thereof. In other words, the blower mounting portion 36 is provided at a position recessed from the side wall of the first and second divided cases 28 and 30 toward the center in the width direction, and is provided between the side wall of the first divided case 28 and the space portion 40. have.

Then, in the air conditioning case 12, the fan 42 of the blower 14 is housed in the mounting hole 38 of the blower mounting portion 36.

Further, as shown in FIG. 1, the air conditioning case 12 is formed with a spiral blower passage 44 so as to surround the outer peripheral side of the blower 14 (see FIG. 2).

As shown in FIG. 2, the blower 14 has a fan 42 having a plurality of fins and a motor 46 for rotationally driving the fan 42, and the axes thereof are in the first and second split cases 28 and 30. It is arranged substantially horizontally so as to extend in the width direction of the vehicle (direction of arrow A).

The evaporator 16 is provided below the blower 14 inside the air conditioning case 12, for example, along the width direction (arrow A direction) of the air conditioning case 12 so as to straddle the first divided case 28 and the second divided case 30. It is provided. Then, heat exchange is performed in the evaporator 16 between the refrigerant circulating inside and the passing air, and the cooled air is supplied to the downstream side of the evaporator 16.

As shown in FIG. 1, the heater core 18 is provided on the downstream side of the evaporator 16 in the air conditioning case 12, heat is exchanged between the hot water circulating inside and the passing air, and the heated air is discharged to the heater core 18. It is distributed to the downstream side of.

The damper mechanism 20 is, for example, an air mix damper 48 provided between the evaporator 16 and the heater core 18, a first switching damper 50 for switching the ventilation state of the vent air outlet 32 and the defroster air port 34, and the vicinity of the occupant's feet. And a second switching damper 54 for switching the blowing state of the foot blowing port 52 for blowing warm air.

As shown in FIGS. 1 to 3, the holder 24 is made of, for example, a plate body having a substantially triangular cross section formed of a resin material, and in the substantially center thereof, a link lever (link) of a link mechanism 26 described later is provided. A hole 56 through which a part of the member) 70 is inserted is formed, and an intermediate link 72a for driving the first and second switching dampers 50 and 54 is formed in the link hole 58 formed near the outer edge portion. , 72b are rotatably supported, respectively.

As shown in FIG. 3, the inner peripheral surface of the hole 56 has a first groove portion (first fitted portion, recessed portion) that is recessed outward in the radial direction and has a predetermined length along the circumferential direction. 60 is formed, and a part of the link lever 70 of the link mechanism 26 described later is engaged.

Then, as shown in FIG. 2, the holder 24 is provided so as to face the space portion 40 with respect to the side wall of the first division case 28, and the first holder 24 is inserted through a plurality of bolts 62 inserted through the corner portions. It is fixed to the side wall of the split case 28 and arranged so as to be substantially parallel to the side wall.

For example, the actuator 22 is rotationally driven by inputting a control signal from a controller (not shown), and is fixed to a surface of the holder 24 on the first division case 28 side (in the direction of arrow A1 in FIG. 2) and is fixed in the space portion 40. The drive shaft 64 projects in the direction (arrow A2 direction) away from the first divided case 28 through the hole 56 of the holder 24.

As shown in FIGS. 3 and 4, the tip of the drive shaft 64 is cut out in a semicircular cross section, and the flat portion 66 has a second groove portion (second fitted portion) recessed toward the intermediate side. , Recess) 68 is formed. The second groove 68 is formed, for example, having a rectangular cross section and a predetermined length.

As shown in FIGS. 1 and 2, the link mechanism 26 includes a link lever 70 connected to the drive shaft 64 of the actuator 22, and a set of intermediate links 72a engaged with the outer edge of the link lever 70. Includes 72b and a set of damper links 74a, 74b engaged to the other ends of the intermediate links 72a, 72b.

As shown in FIGS. 3 and 4, for example, the link lever 70 has a lever body 76 formed in a disk shape from a resin material and projects from the center of the lever body 76 in the axial direction (arrow A1 direction). A shaft hole 80 into which the drive shaft 64 of the actuator 22 is inserted is formed inside the insertion portion 78.

The shaft hole 80 penetrates along the axial direction (arrow A direction), and a wall portion 82 extending inside the shaft hole 80 from the bottom to the lever body 76 side (arrow A2 direction in FIG. 3) along the axial direction. Is formed, and a first claw portion (second fitting portion, convex portion) 84 protruding toward the inner peripheral side is formed in the vicinity of the tip end portion 82.

Then, when the drive shaft 64 is inserted into the shaft hole 80, the flat portion 66 abuts on the wall portion 82, and the first claw portion 84 is inserted into and engaged with the second groove portion 68 recessed outward in the radial direction. Will be done. As a result, the link lever 70 and the drive shaft 64 are connected to each other in a state where relative movement along the axial direction (arrows A1 and A2 in FIG. 3) is restricted. That is, the first claw portion 84 and the second groove portion 68 are regulating means (second regulating portion) capable of restricting the movement of the link lever 70 with respect to the drive shaft 64 in the axial direction (arrows A1 and A2 directions) and preventing them from falling off. ) Functions.

Further, the insertion portion 78 formed in a cylindrical shape has an arm portion 86 that can be tilted in the radial direction on the outer peripheral side of the shaft hole 80, and the arm portion 86 is an insertion portion 78 that is on the lever body 76 side. Extends from the base end to the tip side (arrow A1 direction). At the tip of the arm portion 86, a second claw portion (first fitting portion, convex portion) 88 that bulges outward in the radial direction is formed.

Then, when the insertion portion 78 is inserted into the hole portion 56 of the holder 24, the second claw portion 88 is slidably contacted with the inner peripheral surface of the hole portion 56, and is inserted in a state of being pressed inward in the radial direction and tilted. , The second claw portion 88 is tilted outward in the radial direction and is inserted into the first groove portion 60 to be engaged. As a result, the link lever 70 and the holder 24 are connected to each other in a state where the relative movement along the axial direction (arrows A1 and A2 directions) is restricted.

That is, the second claw portion 88 and the first groove portion 60 are regulating means (first regulating portion) capable of restricting the movement of the link lever 70 with respect to the holder 24 in the axial direction (arrows A1 and A2 directions) and preventing them from falling off. Functions as.

In the link mechanism 26 described above, when the link lever 70 is engaged with the intermediate links 72a and 72b, respectively, the intermediate links 72a and 72b rotate with the link hole 58 of the holder 24 as a fulcrum under the driving action of the actuator 22. Then, the first switching damper 50 and the second switching damper 54 are opened and closed by the damper links 74a and 74b engaged with the other ends of the intermediate links 72a and 72b, respectively.

The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above, and its operation and action / effect will be described next.

First, based on a control signal from a controller (not shown), the fan 42 is rotated by driving the motor 46 of the blower 14, and the occupant operates the operation switch arranged in the vehicle interior to respond to the operation switch. A control signal is output from the controller to the actuator 22, and the first switching damper 50 and / or the second is performed via the link lever 70, the intermediate links 72a, 72b and the damper links 74a, 74b under the driving action of the actuator 22. The switching damper 54 opens and closes.

Then, the air sucked into the air conditioning case 12 under the driving action of the blower 14 flows through the blower passage 44, is cooled by passing through the evaporator 16, and then is mixed with the air that has passed through the heater core 18. The temperature is adjusted to a desired temperature, and air is blown into the vehicle interior through an open vent air outlet 32, a defroster air outlet 34, and the like.

As described above, in the present embodiment, the actuator 22 for driving the damper mechanism 20 constituting the vehicle air conditioner 10 is provided, and the actuator 22 is attached to the holder 24 fixed to the side wall of the first divided case 28. When the second groove portion 68 is formed in the drive shaft 64 of the actuator 22 and the drive shaft 64 is inserted into the shaft hole 80 of the link lever 70 constituting the link mechanism 26, the drive shaft 64 is inserted into the shaft hole 80. The formed first claw portion 84 is engaged with the second groove portion 68 of the drive shaft 64.

Further, the insertion portion 78 of the link lever 70 is formed with a second claw portion 88 protruding radially outward from the outer peripheral surface thereof, and a hole portion of a holder 24 in which the insertion portion 78 is fixed to the first split case 28. When inserting into the 56, the second claw portion 88 is engaged with the first groove portion 60 formed on the inner peripheral surface of the hole portion 56.

Therefore, the link lever 70 constituting the link mechanism 26 is connected in a state where the movement in the axial direction (arrows A1 and A2 directions) relative to the drive shaft 64 of the actuator 22 is restricted, and at the same time, air conditioning is performed. The holder 24 fixed to the case 12 is also connected in a state where the relative movement in the axial direction (arrows A1 and A2 directions) is restricted.

As a result, the link lever 70 can be easily connected by assembling to the drive shaft 64 of the actuator 22 and the hole portion 56 of the holder 24, and moreover, the link lever for either the drive shaft 64 or the holder 24 can be easily connected. Even if the restricted state (connected state) of the 70 is released, it is possible to reliably prevent the link lever 70 from falling off by the other.

Further, by forming the link lever 70 and the holder 24 from a resin material, the first and second claw portions 84 and 88 can be formed at the same time, which is suitable without increasing the manufacturing process. is there.

It should be noted that the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without departing from the gist of the present invention.

10 ... Vehicle air conditioner 12 ... Air conditioner case 14 ... Blower 20 ... Damper mechanism 22 ... Actuator 24 ... Holder 26 ... Link mechanism 28 ... First division case 40 ... Space part 56 ... Hole part 60 ... First groove part 64 ... Drive shaft 68 ... 2nd groove 70 ... Link lever 72a, 72b ... Intermediate link 76 ... Lever body 78 ... Insertion 80 ... Shaft hole 82 ... Wall 84 ... 1st claw 86 ... Arm 88 ... 2nd claw

Claims (3)

It exchanges heat with an air conditioning case having a flow path for air, a blower provided inside the air conditioning case to send air to the flow path, and air provided inside the air conditioning case and flowing through the flow path. In a vehicle air conditioner including a heat exchanger, a damper for changing the flow rate of the air flowing through the flow path, and a drive source for driving the damper.
A link member that is connected to the drive shaft of the drive source and transmits the drive force to the damper.
A holder provided between the drive source and the link member and holding the drive source and the link member with respect to the air conditioning case.
With
The link member is rotatably supported with respect to the holder, and has a first regulating portion that regulates relative movement in the axial direction with respect to the holder.
The second regulating part that regulates the relative movement in the axial direction with respect to the drive shaft,
Have a,
The first regulating portion is a first fitting portion formed in an insertion portion inserted into the hole portion of the holder and fitted into a first fitting portion formed in the hole portion. The second regulating portion is formed inside the insertion portion in the shaft hole portion into which the drive shaft is inserted, and is fitted into the second fitted portion formed on the outer peripheral surface of the drive shaft. vehicle air conditioner according to claim 2 of the fitting portion der Rukoto. The air-conditioning apparatus according to claim 1 Symbol placement,
An air conditioner for a vehicle, wherein the fitted portion is a concave portion recessed in the radial direction, and the fitting portion is a convex portion protruding in the radial direction and inserted into the concave portion. In the vehicle air conditioner according to claim 2.
The shaft hole portion penetrates along the axial direction of the drive shaft, and a wall portion extending from the bottom portion standing toward the center to the lever body side along the axial direction is formed inside. The second fitting portion is an air conditioner for a vehicle, which is formed so as to project toward the inner peripheral side in the vicinity of the tip end of the wall portion.

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