KR100907427B1 - Cam and drive unit assembly of air conditioning unit - Google Patents

Abstract

The present invention is to simplify the coupling of the cam and the drive unit of the air conditioner, and to more easily fix the drive unit to reduce the number of assembly and parts, a cam having a plurality of slits and formed with a fastening hole, A driving unit having a fixed part fixed to the air conditioner by driving the cam, and a connecting part detachably coupled to the fastening hole of the cam by connecting the cam and the driving unit, The drive unit relates to a cam and drive unit assembly of the air conditioner, characterized in that it comprises a connection member coupled to the driving center of the cam and the drive unit to match each other.

Description

Cam and driving unit assembly of air conditioning apparatus

1 is a front view illustrating a connection relationship between a door and a cam of a conventional vehicle air conditioner;

2 is a partially separated perspective view of a case assembly of an air conditioner according to an embodiment of the present invention;

3 is a plan view of a cam according to an embodiment of the present invention,

4 is a perspective view of a connection member according to an embodiment of the present invention;

Figure 5 is a cross-sectional view showing a coupling state of the cam and the connection member according to an embodiment of the present invention,

<Description of the code | symbol in the part of drawing>

10; Case body 11: door

12: hinge axis 13: arm

14: Pin 20: Cam

21: slit 22: first fastening hole

23: 2nd fastening hole 23a: fastening protrusion

23b: detachable part 24: through hole                 

30: connecting member 32: first fastening portion

33: second fastening portion 33a: fastening groove

40: drive unit 41: drive shaft

42: fixed portion 43: support member

The present invention relates to an air conditioner for an automobile, and more particularly, to a cam and a drive unit assembly of an air conditioner, which improves a coupling relationship between a cam for operating various doors installed in a case and a drive unit for driving the cam. will be.

An automotive air conditioner is a device for cooling or heating an interior of an automobile, a cooling heat exchanger in which indoor and outdoor air blown by a blower unit is an evaporator through which a refrigerant flows, and a heater in which cooling water of an automobile engine flows Heat exchange while selectively passing through a heat exchanger for heating (heater core). The heat-exchanged air is selectively passed through ducts connected to the respective parts of the vehicle interior to be supplied to the vehicle interior, thereby cooling or heating the interior of the vehicle.

In such a vehicle air conditioner, the case is provided with a tamper door for selectively supplying the air passing through the evaporator to the heater core and controlling the amount of air passing therethrough, and each duct connected to the case, for example, the floor and deep of the car. At the inlet side of the ducts for supplying air to the roaster and the vent side, a plurality of blower switching doors for supplying air to each duct are provided.

These airflow switching doors are hinged on their inner wall of the duct, and these doors have a cam 2 which is interlocked by an operating lever on the instrument panel, as shown in FIG. 1, and the cam 2. It is connected to the slit (2a) formed in the opening and closing by a drive device provided with a plurality of arms (3) for linking the rotary shafts of the doors. The slit 2a of the cam 2 is set differently in curvature or radius of curvature with respect to the center of rotation so that the doors can be selectively opened and closed according to the rotation angle of the cam 2 according to the blowing mode.

Such a cam is also connected to a separate drive unit by a coupling member such as a washer and a bolt, such a connection is a problem of increasing the number of parts for the coupling of the cam, increasing the number of assembly times. In addition, since the drive unit must be installed so as not to interfere with the movement of the cam, it is difficult to hold the installation position and the like.

On the other hand, Japanese Laid-Open Patent Publication No. 2000-108639 discloses a door driving mechanism of a vehicle air conditioner.

According to the disclosed door driving mechanism, the cam is coupled to the pin of the door from the side wall of the case and the servo motor is coupled to the outside of the cam.

Also in such a structure, since the cam and the servo motor are combined to have a conventional general coupling structure, the number of parts and the number of assembly labors are high, resulting in a problem of low productivity.                         

In addition, there is a problem in that the fixing of the servo motor is difficult in the above structure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a cam and drive unit assembly of an air conditioner that can perform a combination of a cam and a drive unit more simply.

Another object of the present invention is to provide a cam and drive unit assembly of an air conditioner which is easier to fix a drive unit.

In order to achieve the above object, the present invention includes a drive unit having a plurality of slits, a cam having a fastening hole, a driving unit having a fixing part fixed and supported by an air conditioner by driving the cam, and the cam; By connecting the drive unit, and provided with a fastening portion that is detachably coupled to the fastening hole of the cam, wherein the drive unit comprises a connection member coupled to the driving center of the cam and the drive unit to match each other A cam and a drive unit assembly of an air conditioner is provided.

According to another feature of the invention, the fastening hole and the fastening portion may be provided with at least two pairs.

According to another feature of the invention, at least one of the fastening hole is provided with a detachable portion having a fastening protrusion, at least one of the corresponding fastening portion may be provided with a fastening groove formed to be coupled to the fastening protrusion. . At this time, the detachable portion may be formed to have elasticity so that the fastening protrusion coupled to the fastening groove can be separated from the fastening groove.

According to another feature of the present invention, the cam has a through hole, the fixing portion of the drive unit can be fixed to the air conditioning apparatus through the cam through the through hole.

According to another feature of the invention, the through hole may be formed to a length that does not interfere with the movement of the cam by the fixing portion along the rotation path of the cam.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The automobile air conditioner is driven by the driving force of the engine, and selects a compressor for compressing the heat exchange medium, a condenser that condenses the heat exchange medium compressed by the compressor, and air blown from the blower unit to each part of the vehicle interior. And a case assembly in which an evaporator, which is a cooling heat exchanger that is cooled by using the latent heat of evaporation of a heat exchange medium, and a heater core, which is a heat exchanger for heating that uses cooling water of an engine as a heat exchange medium, are installed therein.

Figure 2 shows a part of the case assembly of the air conditioner is mounted on the cam and drive unit assembly according to a preferred embodiment of the present invention, particularly the door drive.

Referring to the drawings, the case assembly includes a case body 10 in which a heater core (not shown) and an evaporator (not shown) are mounted therein, and a plurality of case bodies installed in the case body 10 to vary the flow of air. Two doors 11. Although not shown in the drawing, the case assembly is provided with an evaporator on a passage inside the case body 10 connected to a discharge port of a blower unit (not shown), and a heater core is installed to be spaced apart from the evaporator by a predetermined distance. Is divided into a branch passage in which the heater core is installed, and a bypass passage in which air passing through the evaporator is bypassed to each mode passage installed in the case, that is, the defrost passage, the vent passage, the floor passage, and the like.

A plurality of doors for varying the flow of air is installed at the front end and the branch points of the passages, which are installed between the evaporator and the heater core to temper the air flow to the branch passage and the bypass passage where the heater core is installed. The doors and the air flow switching doors that open and close each mode passage, that is, the defrost passage, the vent passage, the floor passage, and the like. The door 11 shown in FIG. 2 shows one of the temp door and the airflow switching doors.

The door 11 is installed so that the hinge shaft 12 is rotated to the case body 10, the hinge shaft 12 is coupled to one end of the arm 13 provided on the outer surface of the case body 10 As the arm moves, the door may move and open and close. The arm 13 is a first arm 13a directly connected to the hinge axis 12 of the door 12 and an agent connected to an end of the first arm 13 to move the first arm 13a. It may be provided with two arms (13b), in addition to any arm structure that can move the door 12 is possible, the cam described below can be directly connected to the hinge axis of the door without an arm.

According to the present invention as a driving unit for driving the arm as described above, a cam 20 having a plurality of slits and a driving unit 40 connected to the cam 20 by a connecting member 30 to drive the cam are used. do.

According to a preferred embodiment of the present invention, as shown in Figures 2 and 3, the cam 20, a plurality of slits 21 are formed along the outer peripheral portion. As shown in FIG. 2, the slit 21 is fastened with a pin 14 formed at the shortest end of the arm 13 coupled to the hinge shaft 12 of the door 11. Slides along the slit 21 to move the arm 13 in accordance with the pattern in which the slit 21 is formed.

Meanwhile, fastening holes 22 and 23 are formed in the cam 20 so that the connecting member 30 is detachably coupled to the connecting member 30, and the driving shaft 41 of the driving unit 40 is connected to the connecting member 30. Is combined. The drive shaft 41 and the connection member 30 may be coupled by a fixing member 41a such as a separate nut or washer, and may be fixed by welding or the like.

At least two fastening holes formed in the cam 20 may be provided. According to a preferred embodiment of the present invention, as shown in FIG. 3, the first fastening holes 22 and the first fastening holes 22 are disposed to face each other. It may be provided as a second fastening hole (23). The connection member 30 coupled thereto may also have at least two fastening portions inserted into and supported in the fastening holes. According to a preferred embodiment of the present invention, as shown in FIG. 4, the first fastening holes The first fastening portion 32 inserted into and supported by the 22 and the second fastening portion 33 inserted into and fixed to the second fastening hole 23 face the cam at both ends of the rod-shaped connecting member. It may be provided extending in the direction.

First, as shown in FIG. 3, the first fastening hole 22 of the cam 20 is drilled into one single hole, and two rectangular holes may be combined. That is, the first fastening hole 22 has a structure in which two holes having different lengths of horizontal sides are combined, and the upper hole 22a has a wide side length, and the lower hole 22b has a narrow side length. Can be.

As shown in FIG. 4, the first fastening portion 32 of the connecting member 30 coupled to the first fastening hole 22 has a width at an end facing the cam to be coupled, the width of the body of the connecting member 30. The support protrusion 32a which is formed more widely is formed. This support projection 32a is inserted into the upper hole 22a of the first fastening hole 22 of the cam 20, which can be seen in FIG. 3, and its width so that it can be supported by the lower hole 22b. Is preferably shorter than the horizontal length of the upper hole 22a, and longer than the horizontal length of the lower hole 22b.

On the other hand, the second fastening hole 23 of the cam 20 is attached or detached with a fastening protrusion 23a on either the upper side or the lower side, that is, the side facing the first fastening hole 22 or the opposite side thereof. The part 23b can be provided. In this case, as shown in FIG. 4, the second fastening portion 33 of the connection member 30 may be provided with a fastening groove 33a to be coupled to the fastening protrusion 23a on one surface thereof. According to a preferred embodiment of the present invention, the fastening protrusion 23a and the detachable part 23b are installed on the side facing the first fastening hole 22, and the fastening groove 33a of the connection member 30 is also made of The second fastening portion 33 is formed on the surface facing the first fastening portion 32, but may be installed on the opposite side as described above, of course.

The structure of the second fastening hole 23 can be seen in more detail in FIG. 5, that is, as can be seen in FIGS. 3 and 5, the detachable part 23b has an upper portion of the second fastening hole 23. It can be installed on the side, that is, the side toward the first fastening hole 22, in which the detachable portion 23b extends from the cam 20 so as to be separated from the inner surface of the second fastening hole 23. Is formed. As shown in FIG. 5, the detachable portion 23b has a lower protrusion, that is, a fastening protrusion 23a protrudes to correspond to the direction in which the fastening groove 33a of the connection member 30 is formed. have. In addition, the detachable part 23b is connected to the cam 20 by a predetermined gap 23c on the opposite side to which the connection member 30 is coupled, thereby pushing up the detachable part 23b upwards. As a result, the fastening protrusion 23a may be separated from the fastening groove 33a of the connecting member 30, and the detachable part 23b has a predetermined elasticity by the gap 23c.

The cam 20 and the connecting member 30 configured as described above can be mutually coupled and separated as shown in FIG. 5. First, the first fastening portion 32 of the connecting member 30 is inserted into the upper hole 22a of the first fastening hole 22 of the cam 20, and then the support protrusion 32a is lowered downward. (22b). Next, the second fastening portion 33 of the connecting member 30 is inserted into the second fastening hole 23 of the cam 20 so that the fastening groove 33a of the second fastening portion 33 is detachable ( By connecting to the fastening protrusion 23a of the 23b, it is possible to simply couple the connecting member 30 to the cam 20. The separation of the second fastening portion 33 from the second fastening hole 23 is performed by pressing the detachable portion 23b in the direction in which the gap 23c is formed, and the fastening protrusion 23a is separated from the fastening groove 33a. The separation can be easily performed by separating the first fastening portion 32 from the first fastening hole 22 in the reverse order.

On the other hand, as described above, the drive shaft 41 of the drive unit 40 is coupled to the connection member 30, the drive unit 40 as shown in Figure 2, the case of the body 10 It is fixed to the outer side. At this time, the drive unit 40 is provided with a separate fixing part 42, so that the fixing part 42 is fixed so as to be spaced apart from the case body 10 by the support member 43 a predetermined interval. According to an exemplary embodiment of the present invention, the fixing part 42 extends from the driving unit 40, and three pieces are provided, but the shape and number thereof are not necessarily limited thereto. Anything that can couple 40 to case body 10 is possible.

In order to couple the fixing part 42 and the supporting member 43 to the case body 10, the cam 20 has a through hole corresponding to the number of the fixing part 42 and the supporting member 43. 24) is formed. The fixing part 42 and the support member 43 may be directly coupled to the case body 10 by the through hole 24. Accordingly, the through hole 24 may be formed to have a length such that the support member 43 does not interfere with the movement of the cam 20 as the cam 20 rotates.

According to the case assembly of the air conditioner according to the present invention configured as described above can obtain the following effects.                     

First, in the assembling process, the cam can be easily coupled and detached from the drive unit by a connecting member, thereby significantly reducing the number of assembly operations and eliminating the need for a separate member for coupling, thereby reducing the number of parts. .

Secondly, in coupling the drive unit to the case body of the air conditioner, the coupling volume is coupled to penetrate the cam, thereby reducing its installation volume and providing a simpler structure as a whole.

Although the present invention has been described with reference to one embodiment illustrated in the drawings as an example, it is merely exemplary and various modifications and equivalent other embodiments are possible from those skilled in the art. Will understand.

Claims (6)

A cam having a plurality of slits and having fastening holes formed therein; A driving unit having a fixed portion supported by the air conditioner by driving the cam; And By connecting the cam and the drive unit, and provided with a fastening portion that is detachably coupled to the fastening hole of the cam, the drive unit is a connecting member coupled to the driving center of the cam and the drive unit to match each other; Include, And the cam has a through hole, and the fixing portion of the drive unit penetrates the cam through the through hole and is supported and fixed to the air conditioner. The method of claim 1, Cam and drive unit assembly of the air conditioning device, characterized in that provided with at least two pairs of the fastening hole and the fastening portion. The method of claim 2, At least one of the fastening holes is provided with a detachable portion having a fastening protrusion, and at least one of the corresponding fastening portions is provided with a fastening groove formed to be coupled to the fastening protrusion. Unit assembly. The method of claim 3, wherein The detachable part of the cam and drive unit assembly of the air conditioner, characterized in that the fastening projection coupled to the fastening groove is formed to have a resilience to be separated from the fastening groove. delete The method of claim 1, The through hole is a cam and drive unit assembly of the air conditioning apparatus, characterized in that the length of the cam is not disturbed by the fixing portion in accordance with the rotation path of the cam.

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