KR101104279B1 - Electro-magnetic clutch - Google Patents

Abstract

The present invention relates to an electromagnetic clutch, and more particularly, to an electromagnetic clutch which rotates by the power of an engine and sucks a disk coupled to the compressor drive shaft by suction magnetic force induced by an embedded field coil, thereby transferring the engine power to the drive shaft of the compressor. The present invention relates to an electromagnetic clutch which is advantageous in terms of improving the clutch performance by increasing the amount of magnetic flux compared to the same size by forming a flesh extension part on the inner wall of the field coil receiving part of the pulley to improve the magnetic flux flow on the pulley side.

Accordingly, the present invention is rotatably installed in the nose portion 102 of the housing 101 of the compressor 100 and has a pulley having a field coil receiving portion 125 between an inner rim 121 and an outer rim 122 connected to one side thereof. 120 and an electronic coil body 131 fixed to the housing 101 side and inserted into the field coil accommodating part 125 and generating a magnetic force according to whether power is applied to the core housing 133. In the electronic clutch including the field coil assembly 130 accommodated therein, the flesh extension part 127 is formed on the inner wall surface of the field coil accommodating part 125 so as to improve the magnetic flux flow on the pulley 120 side. It is formed, the field coil assembly 130 is characterized in that the weight portion 136 is formed to reduce the flesh on the end side in correspondence to the flesh extension portion 127.

Electronic clutch, pulley, field coil, extension part, weight loss part

Description

Electro-magnetic clutch

1 is a cross-sectional view showing a state in which a conventional electronic clutch is installed in a compressor;

Figure 2 is an enlarged cross-sectional view showing the magnetic flux flow in the conventional electronic clutch,

3 is a cross-sectional view showing a state in which the electronic clutch according to the present invention is installed in the compressor,

4 is an enlarged cross-sectional view of an essential part of an electronic clutch according to the present invention;

5 is an exploded perspective view showing the field coil assembly in the electronic clutch according to the present invention;

6 is a perspective view showing a field coil assembly in the electronic clutch according to the present invention.

Description of the Related Art [0002]

100: compressor 101: housing

102: nose part 103: protrusion end

104: bearing 105: drive shaft

110: electronic clutch 120: pulley

121: inner rim 122: outer rim

123,147: Friction surface 124,146: Slot                 

125: field coil receiving portion 126: drive belt groove

127: skin portion 128: friction material

130: field coil assembly 131: electronic coil body

131a: leader line 132: bobbin

132a: sleeve connecting portion 133: core housing

134: cover 135: flange

136: weight loss 140: herbs

141: inner ring 142: elastic member

143: outer ring 144: rivet

145: disk

The present invention relates to an electromagnetic clutch, and more particularly, to an electromagnetic clutch which rotates by the power of an engine and sucks a disk coupled to the compressor drive shaft by suction magnetic force induced by an embedded field coil, thereby transferring the engine power to the drive shaft of the compressor. The present invention relates to an electromagnetic clutch which is advantageous in terms of improving the clutch performance by increasing the amount of magnetic flux compared to the same size by forming a flesh extension part on the inner wall of the field coil receiving part of the pulley to improve the magnetic flux flow on the pulley side.

The compressor constituting the automobile air conditioner is a device that compresses the refrigerant supplied from the evaporator and sends it to the condenser while driving by the power of the engine, and is installed to selectively receive and drive the engine power by the intermittent action of the electronic clutch.

The electromagnetic clutch for selectively transmitting the power of the engine to the compressor depending on whether power is applied or not is rotatable to the bearing 3 coupled to the nose portion 2a of the housing of the compressor 1 as shown in FIG. 1. It is installed in addition to the crankshaft of the engine and the drive belt (not shown) and the pulley 11 having a friction surface 15 on its side, and is embedded in the field coil receiving portion 14 of the pulley 11 A field coil assembly 20 which is fixed / supported to the housing 2 of the compressor 1 and generates suction magnetic flux by applying power, and a hub 30 coupled to the drive shaft 4 of the compressor 1; , An inner ring 31 coupled to the hub 30, an outer ring 33 connected / coupled through the inner ring 31 and the elastic member 32, and the outer ring 33 and the rivet ( And fixed to the friction surface 15 of the pulley 11 by suction magnetic flux generated by the field coil assembly 20. The complex comprises a disc 34, such as transmitting the rotational force of the pulley 11 to the compressor 1, the driving shaft (4).

According to this configuration, when power is applied to the field coil assembly 20, the disk 34 is moved toward the pulley 11 by the magnetic flux induced by the magnetic induction of the electromagnetic coil, wherein the disk 34 The friction surface of the pulley 11 is adsorbed by the friction surface of the pulley 11, the pulley 11 and the disk 34 is coupled to the power of the engine transmitted to the pulley 11 through the belt is the disk 34 and the outer ring 33 After passing through the inner ring 31 connected to the elastic member 32 through the hub 30 is to be transmitted to the drive shaft (4) of the compressor (1).

When the power supply to the field coil assembly 20 is cut off, the disk 34 is separated from the friction surface 15 of the pulley 11 by the elastic repulsive force of the elastic member 32, so that the engine power is driven by the drive shaft of the compressor ( 4) Stop delivering. In this way, the electromagnetic clutch 10 for the compressor transmits or blocks the power of the engine to the compressor 1 depending on whether the power is applied.

On the other hand, the magnetic flux that is induced by the field coil assembly 20 and pulls the disk 34 toward the pulley 11 according to the application of power is generated in the inner rim 12 of the pulley 11, as shown in FIG. 2. After passing through the pulley friction surface 15 and the disk friction surface 34a which are in contact with each other alternately, and is transmitted to the outer periphery frame 13 of the pulley 11, the magnetic flux in the transfer process and the pulley 11 As the number of alternations between the disks 34 increases or the magnetic flux flows smoothly, the pulley 11 may apply a stronger suction force to the disk 34.

Therefore, the friction surfaces 15 and 34a of the pulley 11 and the disk 34 have respective friction surfaces 15 and 34a to increase the number of times of alternating magnetic flux between the pulley 11 and the disk 34a. An arc-shaped slot (16, 36) for dividing the shape from the inner circumference to the outer circumferential direction is formed. The magnetic ground regions M1, M2, M3, and M4 from the first to the fourth are arranged in this manner.

On the other hand, in accordance with the trend of miniaturization of the electronic clutch 10 in accordance with the recent miniaturization of the compressor (1) has been gradually miniaturized for the pulley (11) for the electronic clutch. As a result, the outer diameter of the pulley 11 is also reduced.                         

However, as the outer diameter of the pulley 11 becomes smaller, the thickness of the outer periphery frame 13 of the pulley 11 becomes very thin, whereby saturation of the magnetic flux occurs at this portion, thereby degrading the performance of the clutch 10. There was a problem.

That is, the magnetic flux generated in the field coil assembly 20 alternately passes through the pulley friction surface 15 and the disk friction surface 34a which are in contact with each other starting from the inner rim 12 of the pulley 11. It is then transferred to the outer periphery frame 13 of the pulley 11, in which the saturation occurs in the process of trying to flow a large amount of magnetic flux to the relatively thin outer periphery frame 13, at the same time the outer periphery frame (13) Because of the thin thickness, the magnetic flux flowing through this portion is also very small, and the performance of the clutch 10 is reduced.

An object of the present invention for solving the above problems is to form a flesh extension portion on the inner wall surface of the field coil receiving portion of the pulley to improve the magnetic flux flow on the pulley side by increasing the magnetic flux compared to the same size to improve the performance of the clutch and compact To provide an advantageous electronic clutch.

The present invention for achieving the above object is a pulley rotatably installed in the nose portion of the compressor housing and having a side coil receiving portion between the inner rim and the outer rim of one side connected to each other through the friction surface, and the field coil receiving portion An electromagnetic clutch comprising a field coil assembly which is fixed to the housing side in an inserted state and receives an electromagnetic coil body generating magnetic force in a core housing according to whether power is applied, thereby improving magnetic flux flow on the pulley side. An inner wall surface of the field coil accommodating part may be provided with an extension part for increasing a thickness of a portion of the outer rim of the outer coil adjacent to the friction surface, and the field coil assembly may correspond to the extension part to reduce fat It is characterized in that the addition is formed.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Repeated description of the same construction and operation as in the prior art will be omitted.

3 is a cross-sectional view showing a state in which the electronic clutch according to the present invention is installed in the compressor, Figure 4 is an enlarged cross-sectional view of the main portion of the electronic clutch according to the present invention, Figure 5 shows a field coil assembly in the electronic clutch according to the present invention 6 is an exploded perspective view, and FIG. 6 is a combined perspective view illustrating a field coil assembly in an electronic clutch according to the present invention.

First, the electromagnetic clutch 110 according to the present invention is rotatably installed on the bearing 104 coupled to the nose portion 102 of the compressor 100, the housing 101, and the crankshaft and the driving belt of the engine (not shown). And a pulley 120 having a friction surface 123 on the side thereof and fixed to the housing 101 of the compressor 100 in a state of being inserted into the field coil receiving portion 125 of the pulley 120. Field coil assembly 130 which is supported and generates suction magnetic flux by applying power, hub 140 coupled to drive shaft 105 of compressor 100, and inner ring coupled to hub 140 141 and the outer ring 143 connected / coupled to the inner ring 141 and the elastic member 142 by the outer ring 143 and the rivet 144, and the field coil assembly Adsorbed by the pulley friction surface 123 by the suction magnetic flux generated in 130 to compress the rotational force of the pulley 120 (100) is configured to include a disk 145 to be transmitted to the drive shaft 105.                     

The pulley 120 has an inner circumferential frame 121 into which the bearing 104 is inserted / coupled, an outer circumferential frame 122 spaced apart from the inner circumferential frame 121, and a driving belt groove 126 is formed on an outer circumferential surface thereof. Pulleys are formed such that the friction surface 147 of the disk 145 rotating together with the drive shaft 105 of the compressor 100 is adsorbed by connecting one side of the inner rim 121 and the outer rim 122 to each other. The friction surface 123, and the other side of the pulley friction surface 123 is formed to be open to the field coil receiving portion 125 provided between the inner rim 121 and the outer rim 122.

In addition, the field coil assembly 130 is inserted into the field coil receiving portion 125, and the pulley 120 is disposed on the friction surfaces 123 and 147 of the pulley 120 and the disk 145 which are in contact with each other. In order to increase the number of alternating magnetic flux between the disk and the disk 145, arcuate slots 124 and 146 partitioning the friction surfaces 123 and 147 are divided in the direction from the inner rim 121 to the outer rim 122. It is formed to.

Meanwhile, the friction material 128 may be further attached to the friction surface 123 of the pulley 120 to increase the friction force with the disk 145.

In addition, the field coil assembly 130 is a pair of electronic coil body 131 formed by winding an electromagnetic coil in a ring shape, and the electronic coil body 131 is accommodated and drawn out from the electronic coil body 131 on one side. The core housing 133 is provided with a sleeve connecting portion 132a in which the leader line 131a is positioned.

Here, the electronic coil body 131 is accommodated in the core housing 133 in a state inserted into the bobbin 132, the electronic coil body 131 and the bobbin 132 is separated from the core housing 133 The opening surface of the core housing 133 is sealed by the cover 134 so as not to be prevented.

On the other hand, the sleeve connecting portion 132a is coupled to a connector (not shown) for supplying external power.

In addition, a flange 135 is coupled to one side of the core housing 133 so as to be pressed and fixed to the protruding end 103 protruding from one side of the housing 101 of the compressor 100.

In addition, as the pulley 120 gradually decreases as the electronic clutch 110 becomes smaller, the flesh thickness of the pulley 120 becomes very thin. Accordingly, in the present invention, the thickness of the outer periphery frame 122 of the pulley 120 having a small portion, that is, the thickness of the pulley 120, can be reduced in order to improve and smooth the flux flow on the pulley 120 side. It is desirable to reduce the flesh of the field coil assembly 130 by increasing and increasing.

Therefore, the skin extension part 127 is formed on the inner wall surface of the field coil accommodating part 125 of the pulley 120.

Here, the flesh extension 127 is formed on the outer rim 122 side of the pulley 120, it is preferably formed by increasing the thickness of a portion of the outer rim 122 adjacent to the friction surface 123. Do.

Such, the dilator 127 protrudes inwardly of the field coil accommodating part 125. Accordingly, the dilator 127 is provided in the field coil assembly 130 inserted into the field coil accommodating part 125. Corresponding to 127, the fat part 136 which reduced the flesh of the end side is formed.

Here, the fat part 136 is formed at the outer peripheral side end of the core housing 133.                     

As described above, the electronic clutch 110 according to the present invention increases the thickness of the outer rim 122 on the inner wall surface side of the outer rim 122 having a relatively small thickness in the small pulley 120. By forming the flesh extension part 127 so that the field coil assembly 130 corresponding to the fat loss part 136, the magnetic flux is increased compared to the size of the same pulley 120 to improve the performance of the clutch 110 You can do it.

In addition, the performance improvement due to the increase in the amount of magnetic flux is more advantageous for the compactness of the pulley 120.

According to the present invention, on the inner wall surface of the field coil receiving portion of the pulley is formed an extension portion for increasing the thickness of the outer periphery frame and corresponding to the field coil assembly to form a skin portion to improve and smoothly flow flux on the pulley side As a result, the amount of magnetic flux increases compared to the same pulley size, thereby improving the performance of the tank clutch and advantageous in compactness.

Claims (3)

Field coil receiving portion 125 is rotatably installed in the nose portion 102 of the housing 101 of the compressor 100 and is connected between the inner rim 121 and the outer rim 122 connected to each other through a friction surface 123. A core housing having a pulley 120 having a) and an electronic coil body 131 fixed to the housing 101 side in the state inserted into the field coil accommodating part 125 and generating a magnetic force depending on whether power is applied. In the electronic clutch comprising a field coil assembly 130 accommodated in 133, In order to improve the magnetic flux flow on the side of the pulley 120, an inner wall surface of the field coil accommodating part 125 may include an extension part which increases the thickness of a portion of the outer rim 122 adjacent to the friction surface 123 ( 127 is formed, the field coil assembly (130) is characterized in that the electronic portion, characterized in that the fat portion 136 to reduce the flesh on the end side corresponding to the extension portion 127 is formed. delete The method of claim 1, The fat part 136 is an electronic clutch, characterized in that formed on the outer peripheral side end of the core housing (133).

Images