KR20010059276A - Field coil assembly for eletromagnetic clutch - Google Patents

Abstract

PURPOSE: A field coil assembling body of an electronic clutch prevents a cover separating from a bobbin, and prevents a terminal for temperature fuse connection exposing to an alien substance. CONSTITUTION: Two lead lines of an electronic coil and two lead lines of a temperature fuse(6) are inserted into the groove formed at the terminal for a temperature fuse connection so that a working process becomes simple. And it is easy to connect and separate the two lead lines. Besides, because two lead lines of an electronic coil and two lead lines of the temperature fuse(6) are inserted into the groove of the terminal for a temperature fuse connection, they do not shake even if a car body is shaken. In addition, an electric leakage is prevented to close the terminal for a temperature fuse connection. Moreover, a bobbin(3) is not separated from a cover(4) when a conveyer carries automatically.

Description

Field coil assembly of electromagnetic clutch {FIELD COIL ASSEMBLY FOR ELETROMAGNETIC CLUTCH}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field coil assembly of an electromagnetic clutch installed in a compressor pulley in order to control the operation of an electromagnetic clutch for controlling power transmission of an engine to a compressor pulley.

The field coil assembly of the electromagnetic clutch forms a magnetic field by electromagnetic induction of the coil wound upon power supply, and the electromagnetic clutch rotates by the engine by dynamically connecting the disk of the pulley and the hub disk of the compressor drive shaft with magnetic force accordingly. An electric device that transmits the driving force of the pulley to the hub disk of the compressor drive shaft, and controls the operation of the cooling system of the air conditioner by intermittent the power to the compressor in accordance with whether or not the power to the wound coil is applied.

The field coil assembly of the electromagnetic clutch comprises a diode which maintains the flow of current in the field coil in a steady state, and a thermal fuse which shortens the coil when the clutch of the compressor is overheated.

The diode maintains the voltage in a steady state when an abnormal voltage such as surge voltage or reverse voltage occurs due to coil vibration in the compressor or repeated on / off operation of the clutch. The coil circuit of the field coil assembly is shorted or the voltage is applied lower than normal serves to prevent the slip phenomenon of the clutch caused.

When the compressor is locked due to an abnormal factor, the thermal fuse is shorted by the clutch slip heat before the bearing of the rotor is locked to shut off the power of the electronic coil, thereby preventing the engine from applying a load due to the compressor lock. It prevents damage to the compressor drive belt.

In particular, the thermal fuse is a disk of the pulley so that the disk of the pulley is slipped with respect to the hub disk of the drive shaft when the compressor is locked, and the temperature of the slip portion is excessively increased. Is installed in close proximity.

FIG. 10 shows an example of a field coil assembly of a conventional electronic clutch having such a temperature fuse, and FIG. 11 is a state in which an electromagnetic coil lead wire and a temperature fuse lead wire clamped by a splice are supported by a support protrusion of a cover. 10 is a cross-sectional perspective view taken along line XI-XI of FIG. 10.

As shown in Fig. 10, the field coil assembly 11 of the conventional electromagnetic clutch comprises: an electromagnetic coil body (reference numeral 2 in Fig. 3) formed by winding an electromagnetic coil in a ring shape; An annular synthetic resin of which one side is open; a synthetic resin bobbin (reference numeral 3 in FIG. 3) which accommodates the electromagnetic coil body and maintains the shape of the electromagnetic coil body; A coring (5), one side of which is opened to receive the bobbin through the open surface and protect the bobbin and the electronic coil body in the bobbin from external shocks; It comprises a cover 4 of the annular ring for sealing the open surface of the coring (5) as a main configuration.

In addition, the field coil assembly 11 of the conventional electronic clutch has an additional configuration, in which a diode (reference numeral 7 in FIGS. 4 and 5) for maintaining the current flow of the field coil in a steady state and the clutch of the compressor are overheated. And a thermal fuse 6 which disconnects the coil when the coil is disconnected.

In the field coil assembly 11 of the conventional electromagnetic clutch, the diode (reference numeral 7 in FIGS. 4 and 5) is an electromagnetic coil body (Fig. 3) in the protrusion connecting portion 32 of the bobbin (reference numeral 3 in FIGS. 3 and 5). After connecting two lead wires 23 and 24 of the electromagnetic coil drawn out and inserted from the reference numeral 2) of the diode and the two lead wires of the diode (reference numerals 71 and 72 of Fig. 5), a pair of diode connecting terminals 33 and 34 10 and 11, the temperature fuse 6 includes two lead wires 61 and 62 of the temperature fuse and two lead wires drawn from the electromagnetic coil body (reference numeral 2 in Fig. 3). The pairs 21 and 22 are connected by a pair of splices 8a which are connected to each other and then supported by supporting protrusions 43a and 44a formed in the cover.

In the field coil assembly 11 of the conventional electromagnetic clutch having the above configuration, as shown in FIG. 10, the two lead wires 21 and 22 of the electromagnetic coil and the two lead wires 61 and 62 of the temperature fuse are spliced. (8a) has a inconvenience in the work process to use a separate crimping tool in the clamping, and the electronic coil was unnecessarily wasted a lot because the lead wire of the electronic coil must be pulled out long during the clamping operation. In addition, the splice 8a connecting the two lead wires of the electromagnetic coil and the temperature fuse was pushed into the support protrusions 43a and 44a to be supported and fixed. However, the rigidity of the support protrusions 43a and 44a was weak, which caused mechanical failure during conveyance. The splice 8a was detached from the support protrusions 43a and 44a by the swing, so that the connection portions of the two lead wires were disconnected or shorted, and the sound was generated. In addition, the cover 4 and the bobbin (3) is separated from each other in the process of the pre-embossing coil assembly of the coring (5) is transported through the conveyor, so that the automated production is difficult and the quality is not stable There was a problem that was not, there was a problem that the exchange is difficult when the temperature fuse (6) malfunctions.

The present invention has been made in view of the above problems of the field coil assembly of the conventional electromagnetic clutch, the present invention is inserted into the terminal insert groove formed in the cover of the heat fuse connection terminal and the pair of recess groove of the terminal The two lead wires of the electromagnetic coil and the two lead wires of the thermal fuse are inserted and energized in parallel, and the breakage prevention part of the terminal is bent to prevent the two lead wires from escaping from the terminal. It is an object of the present invention to provide a field coil assembly of an electromagnetic clutch, in which a cover and a bobbin are not separated during conveyance of a conveyor by forming a molded lock portion in combination with a lock locking groove of a bobbin.

In addition, another object of the present invention is to provide a field coil assembly of the electronic clutch to install the hood so as to surround the temperature fuse connection terminal inserted into the upper surface of the sealing surface of the cover so that the temperature fuse connection terminal is not exposed to foreign matter. For the purpose of providing.

1 is a perspective view of a field coil assembly of an electromagnetic clutch according to the present invention;

FIG. 2 is a front view of FIG. 1 viewed in the “II” direction. FIG.

3 is an exploded perspective view of FIG. 1 in the assembling order.

4 is a cross-sectional view taken along the line IV-IV of FIG. 2.

FIG. 5 is an enlarged cross-sectional view of part “V” of FIG. 1.

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 2.

7 is a cross-sectional view taken along line VII-VII of FIG. 2.

8 is an exploded perspective view illustrating an assembly order of a temperature fuse connecting terminal inserted into a cover according to the present invention, two lead wires and a hood of an electronic coil and a temperature fuse.

9 is a state diagram showing an operating state of the field coil assembly of the electromagnetic clutch in the compressor.

10 is a perspective view of a field coil assembly of a conventional electronic clutch.

FIG. 11 is a state diagram showing a sectional view taken along the line XI-XI of FIG. 10.

<Description of Symbols for Main Parts of Drawings>

21,22: electromagnetic coil lead wire 32: projecting connection

42: seating groove 43,44: terminal insertion groove

45,46: withdrawal hole 6: temperature fuse

8: Terminal for connecting the temperature fuse 9: Hood

The field coil assembly of the electromagnetic clutch according to the present invention for achieving the above object is an electromagnetic coil body formed by winding the electromagnetic coil in a ring shape; A bobbin accommodating the electromagnetic coil body and having a protruding connection portion containing a diode connected to two lead wires of the electromagnetic coil; A coring receiving the bobbin containing the electromagnetic coil body and being inserted into a pulley and fixed to the compressor; A pair of air coils and bobbins that seal the open surface of the coring ring so as not to be separated from the coring ring, and having a seating groove for temperature fuse on the upper surface of the sealing ring, and a pair formed in parallel on both sides thereof in a radial line. A cover having a terminal insertion groove of the cover; A temperature fuse fitted into the seating protrusion groove and having two lead wires at both ends thereof juxtaposed to two lead wires of the electromagnetic coil body; A pair of support portions are inserted into and fixed to the pair of terminal insertion grooves of the cover, and a pair of recess grooves for parallelly inserting and energizing the two lead wires drawn from the electromagnetic coil body and the two lead wires of the temperature fuse are arranged side by side. It characterized in that it comprises a temperature fuse connection terminal consisting of a pair of concave inlet portion, and the separation prevention portion to be folded and wrapped so as not to escape the two lead wires inserted into the pair of concave groove.

On the other hand, the thermal fuse connection terminal is a conductor that is inserted into the terminal insertion groove of the cover and fixed at the same time through the concave groove of the recess the two lead wires of the electronic coil and the two lead wires of the temperature fuse juxtaposed to allow the electricity.

Further, according to the present invention, it is preferable that interference fitting protrusions are further formed at both ends of the support of the temperature fuse connection terminal inserted into the terminal insertion groove of the cover.

In addition, as a preferable feature, the present invention further comprises a hood covering and protecting the terminal for the temperature fuse.

In addition, the cover is preferably coupled to the lock portion formed on the outer circumferential surface of the lock engaging groove formed on the outer circumferential surface of the bobbin.

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

1 is a perspective view showing a configuration of a field coil assembly of an electronic clutch according to an embodiment of the present invention having the above-described configuration, FIG. 2 is a front view of FIG. 1 viewed in the "II" direction, and FIG. It is a perspective view which exploded in the order of assembling the field coil assembly of the electromagnetic clutch of this invention briefly.

As shown, the field coil assembly 1 of the electromagnetic clutch according to the present invention comprises: an electromagnetic coil body 2; An annular bobbin (3) for receiving the electromagnetic coil (2); A coring (5) for accommodating the bobbin (3) containing the electromagnetic coil (2) and fixed to the compressor; It consists of four large structures, such as the cover 4 which seals the open surface of the coring.

4 is a cross-sectional view taken along the line IV-IV of FIG. 2, and FIG. 5 is an enlarged cross-sectional view of the portion “IV” of FIG. 1.

As shown in FIGS. 1 to 5, the annular synthetic resin bobbin (3) is an approximately cross-section in which the upper part is opened and the lower part is closed to accommodate the electromagnetic coil body (2) in which the electromagnetic coil is wound in a ring shape. The protruding connecting portion 32 formed with a pair of through holes (reference numerals 323 and 324 in FIG. 5) into which the two-shaped coil lead wires 23 and 24 can be inserted into the lower bottom surface 31 is formed as a ring-shaped annular shape. It is formed integrally. As shown in FIG. 5, in the pair of through holes 323 and 324 in the protruding connecting portion 32, the electromagnetic coil lead wires 23 and 24 and the diode lead wires 71 and 72 drawn out from the electromagnetic coil body 2 are parallel to each other. It is inserted so as to be connected. In addition, a pair of diode connecting terminals 33 and 34 is formed in the protruding connecting portion 32 by holding gripping grooves 321 and 322 perpendicular to the through-holes 323 and 324, and a domed recess is formed through the holding grooves 321 and 322. The two lead wires are gripped in parallel by being inserted. In addition, the bobbin 3 and the cover 4 to be described later are primarily coupled by locking the lock portion 47 of the cover 4 to the locking engagement groove 35 formed on the outer circumferential surface of the bobbin.

In the cover 4 which seals the open surface of the coring 5 according to the present invention, as shown in FIG. 6, a temperature fuse 6 is inserted into an upper end of the sealed surface of the cover 4. The semicircular concave seating protrusions 42 are seated, and the bottom surface of the seating protrusions 42 is in contact with the body of the temperature fuse 6 to sense heat generated by the electromagnetic coil body 2. The sensing groove 421 is drilled in the direction of the electromagnetic coil body 2.

Meanwhile, as shown in FIGS. 3 and 8, a pair of terminal insertion grooves 43 and 44 for inserting the temperature fuse connecting terminals 8 into both sides of the seating protrusion groove 42 are parallel to the circumferential direction. The pair of terminal insertion grooves (43, 44) is a straight groove for inserting the support portion 81 of the terminal. In addition, the hood insertion grooves 48 and 49, which are relatively longer than the terminal insertion grooves 43 and 44, are parallel to the terminal insertion grooves 43 and 44 in the circumferential direction. It is formed in pairs. In addition, the hood has two outlet holes 45 and 46 which allow two lead wires 21 and 22 of the electromagnetic coil branched from one strand of the electronic coil body 2 to be drawn out to the upper end through the lower end of the sealing surface. It is formed on the inner side of the insertion groove.

7 is a cross-sectional view taken along line VIII-VIII of FIG. 2, illustrating a state in which the terminal and the hood are coupled to each other, and FIG. 8 is a perspective view in which the lead wire, the terminal and the hood of the thermal fuse of the present invention are disassembled in assembling order.

As shown in Fig. 7 and Fig. 8, the thermal fuse connection terminal 8 includes a pair of support portions 81 inserted into the terminal insertion grooves 43 and 44 of the cover and two lead wires drawn from the electromagnetic coil body. A pair of recesses 82 having a pair of recesses 821 and 822 into which the lead wires 61 and 62 of the thermal fuse 21 and 22 can be inserted, and the recesses of the recess 82 Each of the two lead wires inserted into the 821 and 822 includes a pair of escape preventing portions 83 to prevent the two lead wires from being separated from the recesses 82 of the terminal 8. When the thermal fuse connection terminal 8 is shown in a plan view, the upper and lower ends thereof have a substantially rectangular shape having a support part, a recess part, and a release preventing groove. The pair of support parts 81 of the terminal 8 have a rectangular width side. In the plane bent at right angles to each of the lower ends, the interference fitting protrusions 811 are formed at the left and right ends of the support part 81 so that the terminal is stable even after the support part 81 is inserted into the terminal insertion grooves 43 and 44 of the cover. Support. In addition, the pair of concave portions 82 are substantially planar bent at right angles to the upper end in the opposite direction to the support portion 81 on the length side, and a pair of concave grooves 821 and 822 at the upper end of the concave portion 82. It is formed side by side. In addition, the pair of escape prevention parts 83 extend to the upper side on both sides based on the portion (-) cut in the middle of the "H" shape in a state where the horizontal plane forming the rectangle is cut into the "H" shape. The separation prevention part 83 is formed so that the separation prevention part 83 includes two lead wires 21 and 22 of the electromagnetic coil fitted into the recess grooves 821 and 822 of the recessed part 82 and two lead wires of the temperature fuse ( 61, 62 are wrapped horizontally again on top of each of the two leads so as not to deviate.

Meanwhile, as shown in FIGS. 3, 4, and 9, a bobbin having the electronic coil body 2 built in the double ring-type coring 5 made of iron metal has one side open and has a depression-shaped cross section. 3) and cover 4 assembly are inserted. In this process, the protruding connecting portion 32 of the bobbin 3 is positioned through the insertion groove 52 formed in the coring 5, and as shown in FIG. 1, the coil assembly in which the cover and the bobbin are integrally locked is provided. In the case of being inserted into and fixed to the coring, a secondary engagement is achieved by giving an embossing 54 which causes the sealed cover 4 and the coring 5 to be integral to the outer surface of the inner reducing type of the coring. On the other hand, as shown in Figs. 4 and 9, the stator 53 is welded to the coring ring 5 and fixed to the front housing 101 of the compressor on the opposite side of the opening side of the coring ring 5 in a ring shape. The field coil assembly 1 of the electromagnetic clutch is formed.

On the other hand, for the convenience of the operation of the compressor, the embossing operation 54 which allows the cover 4 and the coring 5 to be integrated may be changed to a caulking operation (not shown), and also the coring 5 The stator 53 welded to the front housing 101 of the compressor and fixed to the compressor may be used as a flange (not shown).

As described above, the field coil assembly 1 of the electromagnetic clutch first has a terminal for connecting the temperature fuses to the pair of terminal insertion grooves 43 and 44 formed at the upper end 41 of the sealing surface of the cover 4, respectively. 8) insert and fix the support 81 formed therein, and allow the temperature fuse 6 to be seated in the seating projection groove 42, and then the two lead wires 61 and 62 are formed in the recessed portions formed at both terminals 8 It is inserted into the recessed groove 821 of 82 and fixed. In addition, the two lead wires 21 and 22 of the electromagnetic coil are drawn out of the cover through the outlet holes 45 and 46, and then inserted into the pair of terminal recess grooves 822, so that the two lead wires 61 and 62 of the temperature fuse and The two lead wires inserted into the recessed grooves 821 and 822 by being in parallel and by bending the separation preventing part 83 formed in the terminal 8 over the two lead wires 21, 61, 22 and 62 inserted into the terminal. This will not escape. Since the two lead wires are inserted into the recessed grooves 821 and 822 formed smaller than the outer diameter of the lead wires, the insulator coating is peeled off and the terminals are electrically energized with each other.

On the other hand, the hood 9 for preventing foreign substances is inserted into the hood insertion grooves 48 and 49 of the cover 4 and sealed to the thermal fuse connecting terminal 8 exposed to the outside, thereby to close the field coil assembly of the electromagnetic clutch. Is done.

Therefore, the field coil assembly 1 of the electromagnetic clutch according to the present invention, as shown in Figure 9, is formed integrally with the pulley inside the pulley that receives the power of the engine through the belt to the nose portion 105 of the compressor ) Is installed rotatably via a bearing 104, and one side is opened, and on the opposite side of the opening is formed of a friction surface corresponding to the friction surface 103 of the hub disk, and has a depression-shaped cross section A ring-shaped stator 53 is joined to the inserting groove of 102 with a predetermined gap from the inner circumferential surface of the rotor with a predetermined gap therebetween. The field coil assembly 1 of the electromagnetic clutch is inserted into the insertion groove of the rotor 102 so that the rotor 53 is fixed to the front housing side 101 of the compressor so that the rotor 102 can rotate as the pulley rotates. Supported by .

When power is supplied to the electromagnetic coil, the magnetic flux suction force of the electromagnetic coil acts on the friction surface 103 of the hub disk, so that the driving shaft of the compressor may be rotated by the friction force as the hub disk 103 is in close contact with the pulley friction surface 106. have. If the compressor is locked while the compressor is being driven, rotation of the hub, which is in contact with the compressor drive shaft, becomes impossible. Accordingly, the pulley friction surface 106 is brought into contact with the friction surface 103 of the hub disk to rotate, thereby overloading the belt. A force is applied to damage the belt, and excessive heat is generated between the two friction surfaces, causing damage to the electronic coil or short circuit.

In this case, in the present invention, the temperature fuse 6 is installed on the upper surface of the sealed surface of the cover 4 so as to detect a sudden rise in temperature at the two friction surfaces when the compressor is locked and to cut off the power supply to the electromagnetic coil. On the other hand, a diode (7) is built into the bobbin projecting portion (32) to effectively short-circuit power transmission to the compressor in the event of voltage fluctuations or abnormal overheating due to the compressor lock as described above. Easier to replace parts that can prevent the belt from damage.

As described above, the field coil assembly of the electronic clutch according to the present invention has a problem that a compression tool must be used for splice clamping when connecting and connecting the electronic coil and the temperature fuse, and the operation process is cumbersome, The length of the electronic coil needed to be pulled out to work, but the present invention is made by inserting and energizing the two lead wires of the electronic coil and the two lead wires of the temperature fuse in the recess of the recessed portion formed in the terminal for the temperature fuse connection. As a result, the work process is simple, and the work for connecting, connecting and disconnecting the two leads is easy. In addition, the two lead wires of the electromagnetic coil and the two lead wires of the temperature fuse are inserted into the recesses of the temperature fuse connection terminal fixed to the cover, so that they are stable and stable even when the vehicle body is shaken. Use to seal the terminal for connecting the temperature fuse to which power is applied, and prevent a short circuit. In addition, there was a problem that the field coil assembly (1) of the electromagnetic clutch has to be replaced by a cylinder due to a poor temperature fuse (6), but only the temperature fuse (6) can be replaced by the present invention, leading to an increase in manufacturing cost. The problem was solved.

In addition, the manufacturing process caused a problem that the bobbin is separated from the cover during the automatic transfer by the conveyor caused inconveniences in the operation, but through the lock portion 47 formed on the cover 4, the locking locking groove of the bobbin (35) ), The problem of separation during conveyor transfer is eliminated.

By solving the above problems, stable quality and automated production are possible, and productivity can be improved.

Claims (5)

An electromagnetic coil body 2 formed by winding an electromagnetic coil in a ring shape; A bobbin (3) for receiving the electromagnetic coil (2) and having a protruding connection portion (32) containing a diode (7) for connecting two lead wires (23, 24) of the electromagnetic coil; A coring (5) for accommodating the bobbin (3) containing the electromagnetic coil (2) and inserted into the pulley (102) and fixed to the compressor; The opening surface of the coring ring 5 is sealed to prevent the electromagnetic coil body 2 and the bobbin 3 from being separated from the coring ring 5, and the mounting protrusion groove for the temperature fuse on the upper surface 41 of the sealing face ( A cover 4 having a pair of terminal inserting grooves 43 and 44 formed in parallel on both sides thereof in parallel with each other; A temperature fuse 6 fitted into the seating protrusion groove 42 and having two lead wires 61 and 62 disposed at both ends thereof in parallel with the two lead wires 21 and 22 of the electromagnetic coil body 2; A support portion 81 inserted into and fixed to a pair of terminal insertion grooves 43 and 44 of the cover 4, two lead wires 21 and 22 drawn from the electromagnetic coil body, and two lead wires 61 of a temperature fuse. A pair of recesses 82 provided with a pair of recess grooves 821 and 822 for energizing and inserting the joints in parallel and parallel to each other, and the two lead wires inserted into the pair of recesses 821 and 822 are separated from each other. Field coil assembly of the electromagnetic clutch comprising a terminal for the temperature fuse connection (8) consisting of a separation prevention portion (83) to be bent and wrapped so as not to wrap. The method of claim 1, The thermal fuse connection terminal 8 is a conductor which is fitted into the terminal insertion grooves 43 and 44 of the cover and is connected to two lead wires which are inserted in parallel with the recess grooves 821 and 822 of the recess 82. A field coil assembly of an electromagnetic clutch. The method according to claim 1 or 2, Field coil assembly of the electromagnetic clutch characterized in that it further comprises a hood (9) covering and protecting the temperature fuse connection terminal (8) The method of claim 1, The cover 4 is characterized in that the lock portion 47 formed on the outer circumferential surface thereof is forcibly fastened to the lock engaging groove 35 formed on the outer circumferential surface of the bobbin 3 to be coupled to the bobbin 3. Field coil assembly of the electromagnetic clutch. The method of claim 1, Electronic clutch further comprises an interference fitting protrusion 811 at both ends of the support portion 81 of the thermal fuse connection terminal 8 inserted into the terminal insertion grooves 43 and 44 of the cover 4. Field coil assembly.