KR20160001929A - A power transmission device of an electromagnetic clutch for a compressor - Google Patents

Abstract

The present invention relates to a power transmission device of an electronic clutch for a compressor and comprises: a disk recovery unit recovering a disk to be spaced from a pulley during power of a field coil unit cut-off; a disk bore provided to be integrally moved with the disk; a pulley bore provided to be integrally moved with the pulley; and an interlock unit enabling the disk bore to be interlocked with the pulley bore.

Description

TECHNICAL FIELD [0001] The present invention relates to an electromagnetic clutch for a compressor,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power transmitting apparatus for an electromagnetic clutch for a compressor, and more particularly to a power transmitting apparatus for an electromagnetic clutch that transmits or cuts power of a pulley in a compressor that receives and drives engine power of a vehicle.

Generally, an automobile is provided with an air conditioner (A / C) for cooling and heating the room. Such an air conditioner includes a compressor that compresses gaseous low-temperature and high-pressure gaseous refrigerant introduced from an evaporator into gaseous refrigerant of high temperature and high pressure and sends it to a condenser.

2. Description of the Related Art [0002] Conventionally, a swash plate type compressor is used for a compressor applied to a vehicular air conditioner. The compressor includes a fixed displacement swash plate type compressor that selectively receives the power of the engine by an intermittent action of the electromagnetic clutch depending on whether the clutch is used, There is a variable displacement swash plate type compressor which always receives the power of the engine without using the swash plate type compressor.

These compressors are driven by receiving power from the rotational force of the automobile engine. In the fixed capacity type, an electromagnetic clutch is provided to control the operation of the compressor.

1, an electromagnetic clutch for a compressor according to the related art is frictionally contacted with a pulley 110 and a pulley 110 which are rotatably provided on one side of a compressor housing 105 to rotate the pulley 110 A field coil unit 120 for causing the disc 133 to be attracted to the pulley 110 by power application, a disc recovery unit for restoring the disc 133 to be spaced apart from the pulley 110, Unit 138 as shown in FIG.

The disk 133 is brought into frictional contact with the pulley 110 by the field coil unit 120 to transmit the rotational force of the pulley 110 to the drive shaft 107 and the disk recovery unit 138 drives the drive shaft 107 As shown in Fig.

However, in the related art, the rotational force of the pulley 110 is transmitted to the drive shaft 107 to drive the compressor only when the disc 133 is in friction contact with the pulley 110. At the time of compressor operation, 110, so that the field coil unit 120 must always be supplied with power, which requires a large amount of electric power to absorb the disk to the pulley.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the power transmission apparatus of the electromagnetic clutch for a conventional compressor as described above and it is an object of the present invention to provide a power transmission apparatus of an electromagnetic clutch for a compressor which can reduce power consumed for attracting a disk to a pulley The present invention has been made in view of the above problems.

In order to achieve the above object, the present invention provides a power transmission apparatus for an electromagnetic clutch for a compressor, comprising: a compressor housing rotatably mounted on one side of a compressor housing and receiving power from an external power source, A field coil unit rotatably provided integrally with the drive shaft of the compressor and frictionally contacting the pulley when power is applied to the field coil unit to transmit the rotational force of the pulley to the drive shaft, A disc restoring unit for restoring the disc from the pulley when the field coil unit is powered off, a disc bore movably integrated with the disc, a pulley bore movably integrated with the pulley, And an interlocking unit for interlocking the disc bore and the pulley bore And a gong.

In the power transmission apparatus for an electromagnetic clutch for a compressor according to the embodiment of the present invention, a first spline is formed at one side of the disc bore, a second spline is formed at one side of the pulley bore, 1 spline and a spline coupled to the second spline.

In the power transmission apparatus for an electromagnetic clutch for a compressor according to the embodiment of the present invention, the interlocking unit may further include an actuator for moving the spline gear.

The first spline of the disk bore and the second spline of the pulley bore are continuously provided along the axial direction of the drive shaft, It is also possible to slide the first spline and the second spline.

Preferably, the spline gear is rotatably mounted on a push rod of the actuator.

In the power transmission apparatus of an electromagnetic clutch for a compressor according to an embodiment of the present invention, when the disc is brought into frictional contact with the pulley due to the application of power to the field coil unit, the spline gear is engaged with the first spline and the second spline It is possible to move the spline gear in such a manner that the spline gears are simultaneously engaged with each other.

In the power transmission apparatus for an electromagnetic clutch for a compressor according to an embodiment of the present invention, the field coil unit is configured such that when the spline gear is engaged with the first spline and the second spline at the same time, It is also possible to do.

In the power transmission apparatus for an electromagnetic clutch for a compressor according to the embodiment of the present invention, the field coil unit can also gradually reduce the power when the spline gear is engaged with the first spline and the second spline at the same time Do.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

As described above, according to the power transmission device of the electromagnetic clutch for a compressor according to the present invention, even when the frictional contact between the disk and the pulley is released, the rotating force of the pulley can be transmitted to the drive shaft to drive the compressor, There is an effect that the electric power required for adsorption to the pulley can be reduced.

1 is a side sectional view showing an electromagnetic clutch for a compressor according to a conventional technique,
2 is an exploded perspective view showing a power transmitting apparatus of an electromagnetic clutch for a compressor according to an embodiment of the present invention,
3 is an exploded perspective view showing the power transmitting apparatus of the electromagnetic clutch for the compressor shown in Fig. 2,
Fig. 4 is an assembled cross-sectional view of the power transmitting device of the electromagnetic clutch for the compressor shown in Fig. 2,
5 is an operational state diagram of Fig.

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

2 to 4, a power transmitting apparatus for an electromagnetic clutch for a compressor according to an embodiment of the present invention includes a pulley 10, a pulley 10, A field coil unit 31 for attracting the disk 20 to the pulley 10 by power application, a disk drive unit 30 for driving the disk 20 to rotate the pulley 10, A disc bore 50 integrally movably provided with the disc 20 and a disc bore 50 integrally movable with the pulley 10 so as to be separated from the pulley 10, (60), and an interlocking unit for interlocking the disk bore (50) and the pulley bore (60).

The pulley 10 is rotatably supported by a bearing 2 at the front end of the compressor housing 1. The pulley 10 receives power from an external power source and rotates about the drive shaft 3 of the compressor.

At one side of the pulley 10, a coil receiving groove 11 for receiving the field coil unit 31 is formed. The field coil unit 31 is fixedly coupled to the compressor housing 1 by a coupling bracket 32 in a state where the field coil unit 31 is inserted into the coil receiving groove 11 of the pulley 10.

The disk 20 is brought into frictional contact with the pulley 10 by the field coil unit 31 to transmit the rotational force of the pulley 10 to the drive shaft 3 and the disk 20 is rotated by the disk recovery unit 40 As shown in Fig.

The disk recovery unit 40 includes a hub 41 fixedly coupled to the drive shaft 3, an inner ring 42 fixedly coupled to the hub 41, an outer ring 43 fixedly coupled to the disk 20, And a damper 44 for elastically supporting the outer ring 43 with respect to the inner ring 42.

The hub 41 is fixedly coupled to the distal end of the drive shaft 3 and is axially rotated integrally with the drive shaft 3. The inner ring 42 is screwed to the hub 41 and the outer ring 43 is coupled to the tip of the inner ring 42 by a damper 44. The damper 44 transmits the rotational force of the disk 20 transmitted to the outer ring 43 to the inner ring 42 so as to elastically support the outer ring 43 with respect to the inner ring 42, To reduce the impact of the impact.

When the field coil unit 31 is powered on, the disc 20 is brought into frictional contact with the pulley 10 to rotate integrally with the pulley 10, and when the field coil unit 31 is powered off, So that power transmission is blocked. When the field coil unit 31 is energized, a suction force acts on the disc 20 to move the disc 20 toward the pulley 10. At this time, the damper 44 is elastically deformed, To allow movement. When the power to the field coil unit 31 is cut off, the disc 20 is separated from the pulley 10 by the restoring force of the damper 44.

The disk bore 50 is fixedly coupled to one side of the disk 20 and rotates integrally with the disk 20. The disk bore 50 is formed in a ring shape and a first spline 51 is formed on one side.

The pulley bore 60 is fixedly coupled to one side of the pulley 10 and rotates integrally with the pulley 10. The pulley bore 60 is formed in a ring shape and a second spline 51 is formed on one side.

The first spline 51 of the disk bore 50 and the second spline 51 of the pulley bore 60 are formed to have the same diameter and shape and are provided continuously along the axial direction of the drive shaft 3. Therefore, the first spline 51 and the second spline 51 can be engaged with the spline gear 71 of the interlocking unit described later at the same time.

The interlocking unit includes a spline gear 71 splined to the first spline 51 and the second spline 51 and an actuator 73 moving the spline gear 71.

The spline gear 71 is provided so as to be in contact with the disc bore 50 and the pulley bore 60 and is splined to the first spline 51 and the second spline 51, And a second spline (51).

The actuator 73 is fixedly coupled to one side of the housing 1 of the compressor and the spline gear 71 is engaged with the pulley when the disk 20 is frictionally contacted with the power of the field coil unit 31, The spline gear 71 is moved so as to be engaged with the first spline 51 and the second spline 51 at the same time.

The actuator 73 is provided with a push rod 72 reciprocating linearly and the spline gear 71 is rotatably coupled to the tip of the push rod 72. Therefore, when the disk bore 50 and the pulley bore 60 rotate together with the disk 20, they are inserted into the first spline 51 and the second spline 51, .

The push rod 72 is provided so as to be linearly movable in a direction parallel to the axial direction of the drive shaft 3. The spline gear 71 is meshed with the first spline 51 or with the first spline 51 and the second spline 51 at the same time while being linearly moved along the axial direction of the drive shaft 3 by the actuator 73, do.

4 shows a state in which the disc 20 is separated from the pulley 10 and the actuator 73 extends the push rod 72. As shown in Fig.

The disk 20 is separated from the pulley 10 to rotate only the pulley 10 and the disk 20 does not rotate as shown in FIG. At this time, the actuator 73 extends the push rod 72 so that the spline gear 71 is engaged only with the first spline 51. In this case, not only the disc bore 50 but also the disc bore 50 are stopped together with the disc 20, and the spline gear 71 engaged only with the disc bore 50 does not rotate about the push rod 72, .

When power is applied to the field coil unit 31, as shown in FIG. 5, the disc 20 is attracted while moving toward the pulley 10, and is rotated integrally with the pulley 10. At this time, the spline gear 71 is axially rotated about the push rod 72 while being engaged with the first spline 51. When the push rod 72 is then expanded and contracted by the actuator 73 to lower the spline gear 71 to the pulley bore 60, the spline gear 71 is moved to the first spline 51 and the second spline 51 So that the disk bore 50 and the pulley bore 60 are engaged with each other at the same time.

When the power of the field coil unit 31 is cut off while the spline gear 71 is simultaneously engaged with the first spline 51 and the second spline 51, The pulley 10 and the disk 20 are also restrained integrally by being simultaneously restrained by the spline gear 71. In other words, even when the power of the field coil unit 31 is cut off and the disc 20 is separated from the pulley 10, the disc bore 50 and the pulley bore 60 are restrained by the spline gear 71, 10 to the disk 20. The disk 20 can then be rotated. Accordingly, it is possible to reduce the power applied to the field coil unit 31 when the compressor is driven.

Here, since the pulley bore 60 is already rotated together with the pulley 10, the disk bore 50 also rotates integrally therewith, so there is no relative speed difference between the pulley bore 60 and the disk bore 50. However, the slip may occur on the friction surface of the disc 20 and the pulley 10, and the disc bore 50 may rotate relative to the pulley bore 60 only when the slip occurs.

When the power to the field coil unit 31 is cut off while the spline gear 71 is engaged with the first spline 51 and the second spline 51 at the same time, A slip is generated between the disc 20 and the pulley 10 while the pulley bore 60 rotates relative to the disc bore 50 while the spline gear 71 and the second spline 51 can be correctly engaged with each other.

On the other hand, it is preferable that the electric power of the field coil unit 31 is gradually reduced and shut off. That is, if the power source of the field coil unit 31 is finely reduced, the pulley bore 60 can be finely rotated with respect to the spline gear 71 while generating fine slip between the disc 20 and the pulley 10 So that the minute discrepancies between the spline gear 71 and the second spline 51 can be eliminated to enable accurate engagement.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that the modification or the modification is possible by the person.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Pulley
11: coil receiving groove
20: Disc
31: Field coil unit
32: Coupling bracket
40: disk restoration unit
41: Hub
42: Inner ring
43: outer ring
44: Damper
50: disk bore
51: 1st spline
60: Pulley Bore
61: Second spline
71: Spline gear
72: push rod
73: Actuator

Claims (8)

A pulley 10 rotatably mounted on one side of the compressor housing 1 and receiving power from an external power source and rotating about a drive shaft 3 of the compressor;
A disc 20 rotatably provided integrally with the drive shaft 3 of the compressor and contacting the field coil unit 31 with the pulley 10 when power is applied thereto to transmit the rotational force of the pulley 10 to the drive shaft;
A field coil unit (31) for attracting the disk (20) to the pulley (10) by power application;
A disk recovery unit (40) for restoring the disk (20) to be spaced apart from the pulley (10) when the field coil unit (31) is powered off;
A disc bore (50) provided movably in unison with the disc (20);
A pulley bore (60) provided movably in unison with the pulley (10); And
An interlocking unit for interlocking the disc bore 50 and the pulley bore 60;
And a power transmission mechanism for the electromagnetic clutch of the compressor. The method according to claim 1,
A first spline 51 is formed on one side of the disc bore 50 and a second spline 51 is formed on a side of the pulley bore 60,
Wherein the interlocking unit includes a spline gear (71) spline coupled to the first spline (51) and the second spline (51). 3. The apparatus according to claim 2,
And an actuator (73) for moving the spline gear (71). The method of claim 3,
The first spline 51 of the disc bore 50 and the second spline 51 of the pulley bore 60 are provided continuously along the axial direction of the drive shaft 3,
Wherein the spline gear (71) is slidably movable along the first spline (51) and the second spline (51). 4. The spline clutch according to claim 3, wherein the spline gear (71)
Is provided on the push rod (72) provided in the actuator (73) so as to be rotatable about an axis. 6. The actuator according to claim 5, wherein the actuator (73)
The spline gear 71 is engaged with the first spline 51 and the second spline 51 at the same time when the disk 20 is brought into frictional contact with the pulley 10 due to the power application of the field coil unit 31. [ And the spline gear (71) is moved so as to move the spline gear (71). 7. The field coil unit according to claim 6, wherein the field coil unit (31)
Characterized in that the power is cut off so that the disk (20) is separated from the pulley (10) in a state where the spline gear (71) is simultaneously engaged with the first spline (51) and the second spline (51) Power transmission device of clutch. 8. The field coil unit according to claim 7,
And gradually cuts off the power when the spline gear (71) is simultaneously engaged with the first spline (51) and the second spline (51).

Images