KR101629426B1

KR101629426B1 - Pully for electro magnetic clutch

Info

Publication number: KR101629426B1
Application number: KR1020090129251A
Authority: KR
Inventors: 김새봄; 석종명
Original assignee: 한온시스템 주식회사
Priority date: 2009-12-22
Filing date: 2009-12-22
Publication date: 2016-06-10
Also published as: KR20110072362A

Abstract

The present invention relates to a pulley for an electromagnetic clutch. The pulley according to the present invention includes a suction plate 130 formed to suck a disk 8 coupled to a drive shaft of a compressor by being connected to one side of the inner ring 110 and the outer ring 120, And a pulley body (100) having a plurality of banana slots (131) radially formed on the attracting plate (130) and bridges (132) formed between the respective banana slots (131) Wherein at least one U-shaped groove (150) communicating with three inner sides (141) of the field coil receiving portion (140) is formed, and the groove (150) The reinforcing core member 160 made of a material having a higher rigidity than the reinforcing core member 100 is press-fitted, thereby reinforcing the rigidity of the pulley without reinforcement design of the bridge portion.

Electromagnetic clutch, pulley, reinforcement core

Description

(Pully for electro magnetic clutch)

The present invention relates to a pulley for an electromagnetic clutch.

More particularly, to a pulley for an electromagnetic clutch in which reinforcing core material having a higher rigidity than a pulley material is press-fitted into a wall surface of a field coil receiving portion of a pulley so as to reinforce the strength of the pulley.

The electromagnetic clutch is connected to an engine crank shaft and a belt. The electromagnetic clutch forms a magnetic field in the pulley when the cooling system is on, And the hub is attached to the pulley so as to transmit the power transmitted to the pulley to the compressor drive shaft and to shut off the power between the pulley and the compressor drive shaft when the cooling system is off.

FIG. 1 is a view showing an example of a conventional electromagnetic clutch, and the construction and operation of the electromagnetic clutch will be described with reference to FIG.

1, a conventional electromagnetic clutch 1 includes a pulley 2, which is mechanically connected by a crankshaft of an engine and a drive belt (not shown) and has a friction surface 2a on its side surface, A field coil 3 supported by the housing 5 of the compressor while being contained in the pulley 2 and generating a suction flow rate by power application and connected to the compressor drive shaft 7 by a hub 6 A disk and hub assembly 4 for attracting the disk 8 to the friction surface 2a of the pulley 2 and transmitting the engine power to the compressor drive shaft 7 due to the attracted magnetic flux generated by the field coil 3, .

The electromagnetic clutch 1 having the above-described structure is configured such that the engine power is transmitted to or stopped by the compressor depending on whether power is applied to the field coil 3 or not.

When power is applied to the field coil 3, the disk 8 is moved toward the pulley 2 rotated by the belt connected to the crankshaft by the magnetic flux induced by the magnetic induction, and the friction surface 8a thereof is moved toward the pulley 2 The pulley 2 and the disc 8 are engaged with each other. Thus, the engine power transmitted to the pulley 2 through the belt is transmitted to the compressor drive shaft 7 via the disc 8 and the hub 6.

Conversely, when the power to the field coil 3 is interrupted, the disk 8 is separated from the friction surface 2a of the pulley 2 by the resilient repulsive force of the elastic member 9 so that the engine power is transmitted to the compressor drive shaft 7 The transmission is stopped.

FIG. 2 is a detailed view of a conventional pulley applied to the conventional electromagnetic clutch.

The conventional pulley 2 shown in Fig. 2 includes an inner ring 20 into which the bearing 11 is inserted and an outer ring 20 disposed concentrically with the inner ring 20 at a predetermined distance from the outer ring 20 1) connected to the inner ring 20 and one end of the outer ring 21 by a suction flux of the field coil 3 (shown in FIG. 1) And an adsorption plate 23 which is selectively adsorbed.

A plurality of banana slots 23a are formed radially in the attracting plate 23 for inducing the flow of magnetic flux by the field coil 3 to attract the disk 8 to the attracting plate 23, And a bridge 23b is formed between the pair of side walls 23a.

If the length b1 of the bridge 23b is relatively long, the length of the banana slot 23a is relatively short, so that there is a problem that the attractor speed is weakened in proportion to the short length of the banana slot 23a. On the contrary, Since the length of the banana slot 23a is relatively long when the length b1 of the bridge 23b is shortened, the attractor speed is strengthened in proportion to the long length of the banana slot 23a, but the strength of the attracting plate 23 is weakened A problem occurs.

In order to maintain the strength of the attracting plate 23 while obtaining a desired attracting force, it is necessary to increase the thickness of the portion of the bridge 23b. In this case, the weight of the pulley 2 is increased, Another problem arises.

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide a method of manufacturing a field coil, which is capable of reducing the thickness or width of a bridge by pressing a high- And to provide a pulley for an electromagnetic clutch capable of enhancing the strength of the pulley without enlargement design.

According to an aspect of the present invention,

A suction plate 130 connected to one side of the inner ring 110 and the outer ring 120 to suck the disk 8 coupled to the driving shaft of the compressor and a field coil receiving unit 140 opened to the other side, Wherein a plurality of banana slots (131) are radially formed on the attracting plate (130), and a bridge (132) is formed between the respective banana slots (131) At least one U-shaped groove 150 communicating with the three inner sides 141 of the field coil receiving portion 140 is formed. The groove 150 has the same shape as the groove and is formed in the pulley body 100 And a reinforcing core member 160 made of a material having a high rigidity is press-fitted.

According to an additional aspect of the present invention,

The groove 150 is formed to pass between the bridges 132 and the end of the groove 150 is caulked to fix the reinforcing core member 160 to be pressed into the groove 150. [ It is a pulley for clutch.

According to another aspect of the present invention,

Wherein the reinforcing core member (160) is made of any one selected from a non-magnetic material, a heat-treated steel, and a heat-treated nickel alloy.

The grooves are formed in the inner wall surface of the field coil accommodating portion of the pulley for the electromagnetic clutch according to the present invention and the reinforcing core material made of a highly rigid material is press-fitted into the grooves so as to reinforce the rigidity of the pulley without reinforcement design of the bridge portion have.

Particularly, since the reinforcing core is inserted only in correspondence with the size of the groove, it is very effective as a reinforcing structure because it is independent of the increase of the weight and thickness of the pulley, and does not deteriorate performance or increase material cost.

Brief Description of the Drawings The advantages and features of the present invention, and how to achieve them, will become more apparent with reference to the embodiments described hereinafter with reference to the accompanying drawings.

FIG. 3 is a partially cut away exploded perspective view of the electromagnetic clutch pulley according to the present invention, FIG. 4 is an exploded cross-sectional view of FIG. 3, and FIG. 5 is a joint sectional view of FIG.

In order to enhance the strength of the pulley without enlarging the thickness or the width of the pulley bridge portion for the electromagnetic clutch of the present invention as shown in the above drawings, grooves are formed in the inner wall surface of the feed coil receiving portion, It is essential that the core is press-fitted.

The background configuration of the electromagnetic clutch pulley will be described first for explaining its smoothness.

As shown in Figs. 3 and 4, the electromagnetic clutch pulley has a pulley body 100. Fig. The pulley body 100 has an inner ring 110 in which a bearing 11 (shown in Figs. 1 and 2) is inserted and a ring gear 110 concentric with the inner ring 110 at a predetermined distance from the outside of the inner ring 110 1 and 2) connected to one end of the inner ring 110 and one end of the outer ring 120 while being connected to the disk (not shown) by suction flux of the field coil 3 1 and Fig. 2) is selectively adsorbed.

A plurality of banana slots 131 are formed radially in the attracting plate 130 to induce a flow of magnetic flux by the field coil 3 to attract the disk 8 to the attracting plate 130 And a bridge 132 is formed between the respective banana slots 131.

3 and 4) of the field coil receiving portion 140 formed by the inner ring 110, the outer ring 120, and the attracting plate 130, Shaped grooves 150 communicating with the surface 141 and at least one U-shaped reinforcing core 160 having the same shape as the grooves is press-fitted into the grooves 150. [

When the end face of the reinforcing core 160 is slightly larger than the cross-sectional inner face of the groove 150, the reinforcing core 160 is inserted into the groove 150 It is possible to prevent a disconnection from being arbitrarily discarded.

As shown in FIG. 5, the groove 150 has a wedge structure that is narrowed from the root to the open end, and the reinforcing core 160 inserted into the groove 150 has a wedge It is possible to prevent the reinforcing core member 160 from coming off.

5, the distal end of the reinforcing core 160 is slightly shorter than the distal end of the groove 150, and the distal end of the groove 150 is caulked toward the distal end of the reinforcing core 160 , It is desirable to secure the joining of the reinforcing core member 160 to the groove 150.

Also, it is preferable that the groove 150 is formed between the bridges 132.

In other words, since the banana slots 131 are formed between the bridges 132, it is preferable to form the grooves 150 across the slots. Since the banana slot 131 is a main factor that weakens the strength of the pulley as mentioned in the background art, if the groove 150 is formed and the reinforcing core 160 is inserted, a bridge is added to the banana slot 131 It is possible to obtain a more robust pulley.

Since the reinforcing core member 160 has a reinforcing role, the reinforcing core member 160 may be made of a material having higher rigidity than the material of the pulley body 100, such as a heat treated steel or a nickel alloy. It is a matter of course that the reinforcing core 160 should be made of a non-magnetic material in order to avoid magnetic field interference with the field coil 3.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. The appended claims are to be considered as falling within the scope of the following claims.

1 is a longitudinal sectional view showing an example of a conventional electromagnetic clutch

Fig. 2 is a partially cutaway perspective view of Fig.

3 is a partially cutaway perspective view of an electromagnetic clutch pulley according to the present invention.

4 is an exploded cross-sectional view of an electromagnetic clutch pulley according to the present invention

5 is a sectional view of the coupling of the pulley for electromagnetic clutch according to the present invention

Description of the Related Art

100: pulley body 110: inner ring

120: Outer ring 130: Suction plate

131: Banana slot 140: Field coil receiving part

150: groove 160: reinforcement core material

Claims

A suction plate 130 connected to one side of the inner ring 110 and the outer ring 120 to suck the disk 8 coupled to the driving shaft of the compressor and a field coil receiving unit 140 opened to the other side, A pulley for an electromagnetic clutch having a pulley body (100) in which a plurality of banana slots (131) are radially formed on the attracting plate (130) and bridges (132) are formed between the respective banana slots (131)

At least one U-shaped groove 150 communicating with three inner sides 141 of the field coil receiving part 140 is formed. The groove 150 is formed in the same shape as the groove, The reinforcing core material 160 made of a material having a higher rigidity than the reinforcing core material 160 is press-

Wherein the groove 150 is formed to pass between the bridges 132 and the end of the groove 150 is caulked to fix the reinforcing core member 160 to be pressed into the groove. Pulley for use.

delete

The method according to claim 1,