JPS6018625A - Solenoid spring clutch - Google Patents

Abstract

PURPOSE:To prevent a spring from moving into an axial direction in time of operation, by setting up a subclutch plate hooking a main clutch plate, engaged with an input pulley, and a spring both at both sides of a flange part of a spring cover, while coupling these parts with a spring device. CONSTITUTION:A clutch plate mechanism 3 transmitting the turning moment of an input pulley 1 is constituted of a main clutch plate 31 or an armature, a subclutch plate 33 used for hooking a hook part 6a of a coil spring 6 and an elastic supporting device 35. This elastic supporting device 35 couples the main clutch plate 31 with the subclutch plate 33 and simultaneously energizes the main clutch plate 31 in a direction toward the subclutch plate 33. In addition, the elastic supporting device 35 makes the main clutch plate 31 and the subclutch plate 33 to be supported on the flange part of a spring cover 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic spring installed between a human power shaft of a refrigerant compressor and an output element of an engine in order to intermittently drive a refrigerant compressor of an automatic LJ air conditioner, for example. Regarding the clutch.

A conventional electromagnetic spring clutch includes an input pulley 1, which is a rotary driving body, as shown in the vertical cross-sectional view of FIG.
An excitation coil 2 is built into the input pulley 1 and is compressed (attached to the front housing 101 by a circlip 2C via a circlip 2b), and an excitation coil 2 is connected to the input pulley 1 by applying a voltage to the coil 2. By energizing the magnetic circuit section around 2, it is magnetically attracted and installed on the input pulley 1. One hook part 6a is hooked to the formed notch 151, and the other hook part 6b is attached to the output hub 4, which is a rotating driven body. When the coil 2 is energized, the coil spooling 6 is wound around the outer periphery of the output huff 4 and the cylindrical spring winding surface 1a protruding in the direction of the axis lJ, and this winding force is applied. 1 to 1 of the input pulley 1 to the output hub 4 via the output hub 4 to the key 102 and the Nara 1.
~103 to a fixed compressor input shaft 104. Further, the coil spring 6 is connected to the output hub 4.
The clutch plate 150 is mounted concentrically with the clutch plate 150 and housed in a spring cover 170 made of a non-magnetic material, and the clutch plate 150 is supported by a flange portion 171 of the spring cover 170 on the coupling pulley side. Furthermore, the input pulley 1 is supported by a bearing 109 attached to the outer periphery of the compressor's Freon 1-housing 1()1, and the bearing 109 is
It is fixed to the outer periphery of the front housing 101 by a circlip 108. When the excitation coil 2 is de-energized (de-energized), the permanent magnet f11 fixed to the flange portion 171 of the spring cover 170 by adhesive etc.
73, the clutch plate 150 is attached to the spring cover 110.
The spring 6 is attracted to the spring 6 and returned to its original shape.

However, 1. [The conventional electromagnetic spring crud as described above has the following obvious problems.

(b) Clutch engagement or MIJ9. During operation, the spring 6 jumps out in the axial direction, and the number of spring windings on the input pulley 1a is not constant, so the transmission 1 - torque increase characteristic becomes slightly unstable, and the input pulley and output pulley Peak torque and operating noise increase when connected.

(b) When the protrusion Ea of the spring 6 further increases, the hook portion 6a of the spring 6 hooked on the notch 151 of the clutch plate 150 comes into contact with the annular friction surface 11) of the input J pulley 1, and is excited. Even when the power to the coil 2 is cut off, the torque transmission is not completely cut off and noise is generated.

(c) The magnetic force of the permanent magnet 173 fixed to the flange portion 171 of the spring cover 170 is used to return the clutch plate 150 to its original position when the clutch is released, but if the 0N-OFF operation is repeated. Permanent magnet 1
73 is more likely to resist cracking.

(d) Friction powder is absorbed by the magnet and becomes JI [JI], and the gap between the input boot friction surface 1b and the clutch plate 150 becomes uneven, resulting in failure of clutch release.

For this reason, there is a main clutch plate (main armer boonia) that contributes to the transmission of 1-lux of friction between the clutch plate and the input pulley, and a 4-knob clutch plate (
An electromagnetic spring clutch has been proposed in which the armature is divided into two parts (+J armature) and both armature cores are placed inside a spring cover, or an electromagnetic spring clutch in which the armature and l are reset by a spring. However, in the former case A3, no measures were taken for the return of the main clutch plate, and in the latter case it was not possible to effectively prevent the spring from popping out.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic spring clutch that can reliably prevent the spring from flying out and ensure that the clutch plate returns to its original position at once, thereby reducing clutch disengagement failures.

The electromagnetic spring clutch of the present invention includes a rotary drive body having a cylindrical spring winding surface and a stepped annular friction surface on the outer periphery thereof, and arranged concentrically with the rotary drive body,
A spring cover having a cylindrical portion covering the outer periphery of the spring tHJ surface and a flange portion facing the friction surface is disposed between a right-handed rotating driven body, the friction surface and the inner surface of the flange portion, and the friction surface is A main clutch plate that has an annular plate shape corresponding to the surface, a sub-clutch plate disposed on the outside of the flange portion, and a sub-clutch plate disposed outside or on the outer periphery of the spring cover, the main clutch plate and the rib clutch plate. and the elastic support means that forces the main clutch plate in the direction of the sub-clutch plate, and the clutch plate mechanism supported by the spring cover and the spring winding mechanism of the rotary drive body. ] The spring cover is loosely fitted around the outer periphery of the surface, and the spring cover is formed on the spring cover.
*i1 is a coil spring connected to the rotating driven body, and an electromagnetic force means for frictionally stopping the front main clutch plate on the friction surface of the rotating drive body. It consists of

Since the electromagnetic spring clutch of the present invention has the above-mentioned configuration, it has the following effects: i=l.

b) Separate the clutch plate into a main clutch plate that performs 1-lux transmission with the friction surface of the input boolean and a sub-clutch plate that engages the spring, and install both clutch plates on both sides of the flange portion of the spring cover. , and are connected by spring means or an elastic body, which prevents the spring from moving in the axial direction during operation.

Excitation = 1 Even when the current is not energized to the coil, the reruggage plate is returned to the elastic force of the spring or elastic body without using a permanent magnet, so the gap between the input pulley I'HIJ and the clutch plate is reduced. WflIl of the clutch that is defective
Defects are also less likely to occur.

C) Main clutch plate and 1 knob clutch plate ('J(
A T: 'If they stick together, the rotational driving body and rotational driven body will be damaged due to silk damping action in the rotational direction by the elastic body)
g! The operating noise and the impact of the shuttle during caking can be significantly reduced.

Next, the present invention will be explained in detail with reference to the drawings and one embodiment.

2 to 9 show a first embodiment of the present invention.

The same reference numerals as in FIG. 1 indicate the same parts. The electromagnetic spring clutch of the present invention includes an input pulley 1 which is a rotary drive body connected to a complementary drive pulley of an automatic F engine via a V bell 1, an excitation coil 2 housed inside the pulley, A clutch plate mechanism 3, an output hub 4 which is a rotary driven body fitted to the input shaft 104 of the refrigerant compressor, a spring cover 5 fastened to the output hub 4, and a clutch plate ring groove 3.
and a coil spring 6 hooked to an output hub 4.

The input terminal, excitation coil 2, output hub 4, and coil spring 6 are the same as those in the conventional example.

3 is a clutch plate mechanism C for transmitting and covering the rotational torque of the input pulley 1, which includes a main clutch plate 31 with an arch core, a sub-clutch plate 33 for engaging the hook portion 6a of the coil spring 6, and the main clutch. Board 3
1 and the rib clutch plate 33, and move the main clutch plate 31 in the direction of the rib clutch plate 33 (=J force).
And main clutch plate 31J3J small 1 knob clamp=
It consists of an elastic support means 35 for supporting the plate 33 on the seven runte portions of the spring cover 5.

5.1 A cylindrical part 51 made of non-magnetic metal such as copper alloy or aluminum alloy and fitted onto the coil spring 6, extending from one end of the input bobbin friction surface 1b of the cylindrical part 51. Three arc-shaped sulins 1 to 5G are formed at predetermined positions on the same circumference and are formed corresponding to the friction surface 1b of the input boob.
This is a spring cover consisting of a flange part 53 arranged in a row, and a hub part 55 extending from the end toward the center, and the hub part 55 is fastened to the end surface 42 of the output hub 4 with bolts 43. The cylindrical portion 51J3 and the flange portion 53 have a notch 57 for attaching a hook portion 6a of a coil spring 6, which will be described later, so that the hook portion 6a can be displaced in the circumferential direction; Surins 1 to 59 are formed in the circumferential direction.

The main clutch plate 31 is disposed on the flange portion 53 of the spring cover on the side of the friction surface 111 of the input pulley 1, and faces the friction surface. A counter-sunk bottle seat 32 is provided, and the bottle seat 32 has a penetrating bottle hole 3ia hJGJ.A sub-clutch plate 33 is disposed outside the cover-flange portion 53, and A through-bottle hole 33a is formed opposite to the hole 31a, and a notch 34 is provided on the inner periphery of the through-bottle hole 33a to engage the spring hook portion 6a.

The hook portion 68 of the spring 6 is inserted into the cylindrical portion 51 through the notch 57 provided in the flange portion 53 of the spring cover 5, as shown in FIG.
9, and is housed in the slit 59 so that the hook portion 6a is positioned on the outside of the seven runte portion 53.

The elastic support means 35 is connected to the pin hole 3 of the main clutch plate 31.
1a1 Spring cover flange portion 53 has 3 holes formed at equal intervals on the circumference having the same radius as the bottle hole 31a.
The head 36a is inserted into the two arc-shaped slits 56 and the pin hole 33a of the rib clutch plate 33, and the head 36a is housed in the pin seat 32 of the main clutch plate and protrudes outward from the sub-clutch plate 33. A return spring 3, which is a coil spring in this embodiment, is installed on the tip side of the bottle 3G.
1 is extrapolated and the tip of the bottle 3G is caulked to form a leg portion 36b to hold the return spring 37 so that it does not come off.

Next, the operation of this electromagnetic spring cover will be explained.

When voltage is applied to the excitation coil 2, the surrounding magnetic circuit section and the main clutch plate 31 are energized.
The main clutch plate 31 is magnetically attracted, is frictionally engaged with the friction surface 1b of the input pulley 1, and rotates together with the input pulley. The torque of the input boolean is transmitted to the sub-clutch plate 33 via the pin 36, and the clutch plates 31 and 33, which are integrated in the rotational direction by the pin 36, are displaced in the rotational direction along the arc-shaped suline 1-5G. . Along with this, the hook portion 69 of the coil spring 6 hooked to the notch 34 of the rib clutch plate 33 is rotationally displaced together with the pin 36, and the pulley 1
and the outer periphery 4a of the output hub 4, and transmits 1-lux of the input pulley 1 to the output hub.

When the power supply to the excitation coil 2 is cut off, the main clutch plate 31 is released from the friction surface of the input pulley 1 by the action of the return spring 37 and returns to the original IQ position, and the back surface of the main clutch plate 31 and the spring The seven runte portions 53 of the cover 5 uniformly contact the surface C. Main clutch plate 31
At the same time as the coil spring 6 returns to the spring cover 5, the coil spring 6 is returned by its self-returning force, and the 1-lux transmission is released.

In this embodiment, the bottle 36 passes through the arc-shaped slides 1 to 56 of the seven runte portions 53 of the spring cover 5, and thereby the main clutch plate 31, (J° clutch plate 33, and gangway plate consisting of the elastic support means 35). Although the mechanism 3 was supported on the flange portion 53 of the spring cover, the outer diameter of the 7 runte portion 53 of the spring cover and the arc-shaped sulin 1~
It is also possible to guide three or more bottles 36 on the outer periphery of each bottle by making the inner diameter side of each bottle the same.

10 to 12 show a second embodiment of the present invention.

In this embodiment, the first stage 35 of elastic support of the main clutch plate 31
Smell C Instead of the return spring 37 of the first embodiment, the return force of the main clutch plate 31 is applied to the side surface of the sub-clutch plate 33 and the leg portion 36b of the bottle 3G when the excitation coil 2 is de-energized.
A return spring consisting of an annular leaf spring 38 interposed between the sub-clutch plate 33 and a plurality of protrusions 38a for supporting the annular leaf spring 38 is provided on the side surface of the sub-clutch plate 33.

In addition to the annular leaf spring, springs with other structures such as single-eve springs and book springs can also be used.

13 to 17 show a third embodiment of the present invention.

In this embodiment, the clutch plate mechanism 7 is arranged coaxially outside the outer periphery '53a of the flange portion 53 of the spring cover, and includes the annular connecting ring 77 whose one end is fitted and fixed to the outer periphery of the main clutch plate 71. An elastic body 75 made of an elastic material such as rubber is filled between the inner peripheral wall 71Δ of the end edge and the outer peripheral wall 73A of the one-knob clutch plate 73 to fix them together. . In addition, the main clutch plate 11 of the flange portion jj3 of the spring cover
In order to support the main clutch plate 71, there are steps 19 made of a material such as resin or rubber on the ring surface at four locations, for example.

In this embodiment, the clutch plate machine 4M7 is supported on the flange portion of the spring cover by sandwiching the flange portion 53 of the spring cover between the main clutch plate 71 and the sub-clutch plate 73.

In this embodiment, when the excitation coil 2 is energized, the bullet 1) 1 rest 75
is deformed, and the main clutch plate 71 is attracted to the friction surface 1b of the input valve 1, and is frictionally engaged with the friction surface 1b.

In this case, after the main clutch plate 11 is attracted, 1 to 1 torque is transmitted to the sub-clutch plate 73 via the elastic body 75 and the coil spring 6 starts to be wound. faip is attenuated and the operating noise and shock can be alleviated. Furthermore, at the time of release h1, the main clutch plate 71 is supported by the stopper 79'', thereby preventing the occurrence of metallic noise due to impact.

Furthermore, when the excitation coil 2 is de-energized, it returns to its original position due to the axial return force component of the elastic body. Note that the elastic body 75 is connected to the annular connecting ring and the main clutch plate 7.
It may be provided between the outer circumferential wall of 1 and the outer circumferential wall of 1, or may be provided on both sides. Further, the stopper 79 can be effectively used in the first embodiment and the second embodiment.

The fourth embodiment shown in FIGS. 18 and 19 is shown.

In this embodiment, instead of the annular elastic body of the third embodiment, a plurality of holes 83 (three in this embodiment) are formed at equal intervals in the rib clutch plate 82 between the main clutch plate 81 and the sub clutch plate 82. A clutch plate mechanism 8 is used in which an elastic body 84 made of bush-shaped rubber is fitted, one end is fixed to the main clutch plate 81, and the other end is connected by a pin 85 fixed to the center of the bush-shaped rubber. That is, the through hole 83 provided in the four-nub clutch plate 82 and the pin 85 are adhesively bonded using the elastic body 84, and then one end of the pin 85 is press-fitted into the hole 81a provided in the main clutch plate 81. The effects of this fourth embodiment are similar to those of the third embodiment. Even if J5 is used in this embodiment, the elastic body 84 is the main clutch plate 81.
It may be installed on both clutch plates, or it may be installed on both clutch plates.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional electromagnetic spring gangway;
3 is a left side view of the electromagnetic spring clutch according to the first embodiment of the present invention, and FIG. 4 is a rear view of the electromagnetic spring clutch according to the first embodiment of the present invention.
FIG. 5 is an enlarged view of the main part of the left side cross section of the electromagnetic spring clutch according to the first embodiment, and FIG. 5 is a plan view of a part of the spring cover of the electromagnetic spring clutch according to the first embodiment of the present invention.
Fig. 6 is a left side view of a part of the spring cover of the electromagnetic spring clutch according to the first embodiment of the present invention, Fig. 7 is a back side of the main clutch plate [Fig.
FIG. 9 is a rear view of the sub-clutch plate, FIG. 10 is a rear view of the electromagnetic spring clutch according to the second embodiment of the present invention,
FIG. 11 is a left side view of an electromagnetic spring clutch according to a second embodiment of the present invention, FIG. 12 is an enlarged view of a main part of a left side cross section of an electromagnetic spring clutch according to a second embodiment of the present invention, and FIG. 13 14 is a front view of the clutch plate, FIG. 15 is a left side sectional view of the sub-clutch plate, and FIG. 16 is a left side sectional view of the electromagnetic spring cover according to the third embodiment of the present invention. A rear view, FIG. 17 is a sectional view of the clutch portion, FIG. 18 is a side sectional view of the clutch plate of the electromagnetic spring clamp according to the fourth embodiment of the present invention, and FIG. 19 is an enlarged view of the main part of the spring cover. It is. In the diagram: 1... Input 1-re 2... Excitation 3.
l, 8...Clutch plate mechanism 4...Output hub 5.
・Spring horn bar 6・Coil spring
1a...Spring winding 1b...Friction surface 3
5...Elastic support means 1 1 Fig. 2 Fig. 9 #110 Fig. 6 Fig. 12 Building 11 Fig. 3 b

Claims (1)

[Scope of Claims] 1) A rotary drive body having an 11-circle-shaped spring winding surface and an annular friction surface provided on its outer periphery; A rotating driven body having a spring cover having a cylindrical portion covering the outer periphery of a spring-wrapping surface and a flange portion facing the friction surface, and a rotating driven body disposed between the friction surface and the inner surface of the clutch portion; ? A main clutch plate having an annular plate shape corresponding to the friction surface, a sub-clutch plate disposed on the outside of the flange portion, a latch plate provided outside or on the outer periphery of the J3 and spring cover, and a latch plate for the main clutch plate. a clutch plate mechanism supported by the spring cover and having an elastic support means for connecting and covering the main clutch plate and urging the main clutch plate in the direction of the sub-clutch plate Ij; , - a coil spring connected to the sub-clutch plate through a slit formed in the spring cover, and the other end of the coil spring connected to the rotating driven body;
An electromagnetic spring clutch comprising an electromagnetic spring clutch for frictionally engaging the main clutch plate with a friction surface of the rotary drive body. 2) The elastic support means of the clutch plate mechanism is a pin hole provided in the main clutch plate, an arcuate slit formed in the flange part of the spring cover, or an IC provided in the outer periphery of the flange part of the spring cover, lll3 and rib clutch plate. Feature N11i is characterized by a plurality of pins inserted into the pin holes, and a spring provided with one end locked to the pin and the other end abutting against the side wall of the spring cover. An electromagnetic spring clutch according to item 1 of the scope. 3) The elastic support means of the clutch plate mechanism includes a connecting ring that is fitted onto the main clutch plate, the clutch portion of the spring cover, and the first nub clutch plate and connects the two gudge plates;
Special feature 1Y, characterized by comprising at least one elastic body interposed between the outer periphery of the main clutch plate and the inner periphery of the connecting ring or between the outer periphery of the sub-clutch plate and the inner periphery of the connecting ring. An electromagnetic spring clutch according to claim 1. 4) The elastic support means of the clutch plate mechanism includes an elastic body fitted into a plurality of holes formed in at least one of the main clutch plate or the sub-clutch plate, and an arc-shaped elastic body formed on the outer periphery of the spring cover or in the spring cover. Claim 1: The bottle is arranged through a slit and has at least one end fixed to the elastic body of the main clutch plate or the sub-clutch plate to connect the main clutch plate and the leave clutch plate. Electromagnetic spring clutch as described in section.