JP2002195298A - Electromagnetic clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adequately prevent the electromagnetic clutch (especially a friction surface of armatures) from being stained with oil. SOLUTION: A tapered part 140d becoming gradually wider increasing the diameter of an internal circumferential wall surface 140c towards the direction opposite to the friction surface 141c is formed on the circumferential groove 150 and the internal circumferential wall surface 140c of the armature 140 surrounding the armature 140. Hence, even if oil is dropped on the electromagnetic clutch 10 on the inspection of an engine or in supplementing of oil, the oil dropped flows downwards along the circumferential groove 150 (wall surface 151) and drops from the electromagnetic clutch 100 without flowing towards the friction surface side 141c. Oil which is stuck on the head of a bolt 111 and arrives at the internal side wall surface 140c flows to the opposite side of the friction surface 141c and is dropped out of the electromagnetic clutch 100 without flowing to the side of the friction surface 141c disturbed by the tapered part 140d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic clutch for intermittently transmitting a driving force of a driving source to a driven device, and is mounted on a crankshaft of an engine (internal combustion engine) to be able to intermittently drive the engine. In addition, the present invention is effective when applied to an electromagnetic clutch for transmitting to rotating devices in an engine room such as a hydraulic pump and a compressor.

[0002]

2. Description of the Related Art Conventionally, in an electromagnetic clutch used in a compressor for an air conditioner, oil leaked from a shaft seal of the compressor travels along a shaft connected to the electromagnetic clutch and the like, and an electromagnetic clutch (especially an armature or the like). In order to prevent the transmission of the driving force from being attached to a component having a friction surface), a cover has been provided inside the electromagnetic clutch to cope with the problem.

[0003]

[0005] By the way, in the equipment assembled to the engine, oil such as engine oil easily drops (hangs) when the engine is inspected or when engine oil is added. Therefore, the electromagnetic clutch is directly connected to the engine. When the engine is assembled, oil tends to drip (hang) on the electromagnetic clutch when the engine is checked or when engine oil is added.

[0004] For this reason, the conventional means of providing a cover inside the electromagnetic clutch does not allow the electromagnetic clutch to be directly connected to the crankshaft of the engine in an environment relatively assembled on the lower side of the engine. However, it is difficult to sufficiently prevent oil from adhering to an electromagnetic clutch (particularly, an armature).

In view of the above, it is an object of the present invention to sufficiently prevent oil from adhering to an electromagnetic clutch (particularly, an armature).

[0006]

According to the present invention, in order to achieve the above object, a driving source (E) is provided.
/ G) Drive-side rotating member (110) that is driven to rotate by (G)
And a driven-side rotating member (120) connected to and driven by the driven device (200), an excitation coil (130) that generates a magnetic field when energized, and a driving-side rotating member (11).
0) and the driven side rotating member (120) are connected to one member (110), and the other member (1
And an armature (140) that is attracted to the driven side rotating member (120) and transmits a driving force from the driving side rotating member (110) to the driven side rotating member (120). The armature (140) has a rotating shaft that is substantially horizontal. The rotating member (110, 120) and the armature (140) are installed, and the armature (14
On the outer diameter side from 0), a ring is formed so as to surround the armature (140), and both rotating members (110, 120) are formed.
Characterized in that a wall surface (151) substantially parallel to the rotation axis is provided.

Thus, even if oil is dropped on the electromagnetic clutch at the time of, for example, checking the engine or adding engine oil, the dropped oil does not flow toward the armature (140), but flows along the wall surface (151). To fall from the electromagnetic clutch.

Therefore, even if oil is dropped on the electromagnetic clutch at the time of engine inspection or when engine oil is added, the dropped oil can be prevented from adhering to the armature (140).

According to the second aspect of the present invention, the driving source (E /
A drive-side rotating member (110) driven to rotate by G)
And a driven-side rotating member (120) connected to and driven by the driven device (200), an excitation coil (130) that generates a magnetic field when energized, and a driving-side rotating member (11).
0) and the driven side rotating member (120) are connected to the member (110) on either side, and the electromagnetic force generated by the magnetic field induced by the exciting coil (130) causes electromagnetic force generated by the magnetic field on the other side (1).
And an armature (140) that is attracted to the driven side rotating member (120) and transmits a driving force from the driving side rotating member (110) to the driven side rotating member (120). The armature (140) has a rotating shaft that is substantially horizontal. The rotating member (110, 120) and the armature (140) are installed, and the armature (14
On the outer diameter side of (0), both rotating members (110, 12) formed in a ring shape so as to surround the armature (140).
0) A circumferential groove (150) having a substantially concave cross-sectional shape depressed in the direction of the rotation axis is provided.

Thus, even if oil is dropped on the electromagnetic clutch at the time of engine inspection or addition of engine oil, for example, the dropped oil does not flow to the armature (140) side and the circumferential groove (150) Flows downward along the, and falls from the electromagnetic clutch.

Therefore, even if oils are dropped on the electromagnetic clutch at the time of checking the engine or adding engine oil, the dropped oils can be prevented from adhering to the armature (140).

According to the third aspect of the present invention, the driving source (E /
A drive-side rotating member (110) driven to rotate by G)
And a driven-side rotating member (120) connected to and driven by the driven device (200), an excitation coil (130) that generates a magnetic field when energized, and a driving-side rotating member (11).
0) and the driven side rotating member (120) are connected to the member (110) on either side, and the electromagnetic force generated by the magnetic field induced by the exciting coil (130) causes electromagnetic force generated by the magnetic field on the other side (1).
The friction surface (14) that is attracted to the driving rotary member (110) and transmits the driving force from the driving rotary member (110) to the driven rotary member (120).
1c), the two rotating members (110, 120) and the armature (1) such that the rotation axis of the armature (140) is substantially horizontal.
40) is installed, and the inner peripheral side wall surface (140c) of the armature (140) has a tapered portion (140c) in which the diameter of the inner peripheral side wall surface (140c) increases toward the side opposite to the friction surface (141c). 141d) is provided.

As a result, the oils can be transferred from the armature (14).
0) along the inner peripheral side wall surface (140c).
b), the armature (140) and the like are installed so that the axial direction is substantially horizontal, and the inner peripheral side wall surface (140c) has a friction surface (140).
Since the tapered portion (140d) is provided such that the diameter of the inner peripheral side wall (140c) increases toward the opposite side to b), the oils that have reached the inner peripheral side wall surface (140c) are subjected to friction. Instead of flowing to the surface (140b), it flows to the opposite side to the friction surface (140b) and drops from the electromagnetic clutch.

Therefore, even if oils drop onto the electromagnetic clutch at the time of checking the engine or adding engine oil, the dropped oils can be prevented from adhering to the armature (140).

According to the fourth aspect of the present invention, on the outer diameter side of the armature (140), the two rotating members (11) formed in a ring shape so as to surround the armature (140).
(0, 120) is provided with a circumferential groove (150) having a substantially concave cross-sectional shape depressed in the direction of the rotation axis.

Thus, the oils can be dropped from the electromagnetic clutch in the same manner as in the second aspect of the present invention, so that the dropped oils can be more reliably placed in the armature (1).
40) can be prevented beforehand.

In the fifth aspect of the present invention, the circumferential groove (15
0) is an axial end face (121a) of a cylindrical member (121) disposed so as to cover the outer peripheral side of the armature (140).
It is characterized by being formed in.

Accordingly, it is possible to more reliably prevent the oils dropped from adhering to the armature (140).

Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiment is applied to a drive system of a compressor for a hybrid vehicle that runs by combining an engine (internal combustion engine) and an electric motor,
FIG. 1 is a schematic diagram showing a driving method of a compressor for an air conditioner (hereinafter, abbreviated as a compressor) according to the present embodiment.

In FIG. 1, reference numeral 100 denotes a clutch and a V-belt for transmitting a driving force of an engine (drive source (E / G)) E / G to a compressor (driven device, rotating device) 200 so that the driving force can be intermittently transmitted. The electromagnetic clutch 100 is directly connected to a crankshaft (not shown) of the engine E / G.

Then, the air conditioner is operated (A /
In the case where the C switch is ON, the electromagnetic clutch 100 is connected (while ON) to drive the engine E / G to the compressor 200 while the engine E / G is operating.
The electromagnetic clutch 100 is disengaged (turned off) while the engine E / G is stopped, and the compressor 200 is driven by another electric motor different from the electric motor for traveling.

Reference numeral 210 denotes a radiator (condenser) that exchanges heat between the refrigerant discharged from the compressor 200 and the outside air to cool the refrigerant, and 220 denotes a decompressor that decompresses the refrigerant flowing out of the radiator 210. Reference numeral 230 denotes an evaporator that exchanges heat between the refrigerant depressurized by the decompressor 220 and the air blown into the room to evaporate the refrigerant, thereby cooling the air blown into the room.

Incidentally, in this embodiment, a temperature-type expansion valve for mechanically adjusting the valve opening so that the degree of heating of the refrigerant at the outlet side of the evaporator 230 becomes a predetermined value is employed as the decompressor 220.

Next, the electromagnetic clutch 10 according to this embodiment will be described.
The structure of 0 will be described.

FIG. 2 shows an electromagnetic clutch 10 according to this embodiment.
0 is an axial cross-sectional view of FIG.
/ G is a metal center hub (drive-side rotating member) that is connected to the / G crankshaft and rotates integrally with the crankshaft. The center hub (hereinafter, abbreviated as hub) 110 is a key (JIS B 1301). ), And is fixed to the crankshaft by bolts 111 in a state where it is prevented from rotating with respect to the crankshaft.

Reference numeral 120 denotes a rotor (driven side rotating member) which rotates integrally with a substantially cylindrical pulley (cylindrical member) 121 on which a V-belt is hung. This rotor 120 and the pulley 121 are elastically deformable. They are connected via a first damper member 122 made of a material (in this embodiment, EPDM (ethylene / propylene / diene terpolymer rubber)).

The first damper member 122 is made of metal (in this embodiment, press-fitted and fixed to the inner cylindrical wall of the pulley 121 made of metal (FC material in this embodiment) and the outer cylindrical wall of the rotor 120. , SGP material) and vulcanized to the outer wall of the cylindrical member 123, and the first damper member 12
2 and the rotor 120 and the pulley 121
And the torque (driving force) is transmitted.

The rotor 120 has a double cylindrical structure including an outer cylindrical portion 124, an inner cylindrical portion 125, and a ring plate portion 126 connecting the outer cylindrical portion 124 and the inner cylindrical portion 125 at one axial end. The outer tube portion 124, the inner tube portion 125, and the ring plate portion (friction plate) 126 are made of a ferromagnetic material such as an iron-based material having a low carbon content (in this embodiment, S10).
C), a part of a magnetic path (yoke) of a magnetic flux induced by the excitation coil 130 described later is formed.

The rotor 120 is provided with a bearing (in the present embodiment, the bearing is disposed between the outer cylinder portion 124 and the hub 110).
The two rolling bearings 127 support the hub 110 so as to be rotatable with respect to the hub 110. Incidentally, the bearing 127 has its inner race fixed to the outer peripheral wall of the hub 110 by press-fitting, and its outer race fixed to the rotor 120.
(The outer cylinder part 124) is press-fitted and fixed to the inner cylinder wall, and the stepped part 1 formed on the retaining ring 128 and the hub 110.
12 and positioned in the axial direction.

A ring-shaped exciting coil (stator coil) 130 for generating a magnetic field when energized is inserted into a space between the outer tube portion 124 and the inner tube portion 125. The coil 130 is made of a ferromagnetic material such as an iron-based material having a low carbon content (in this embodiment, S10
It is held by a stator housing (holding member) 131 also serving as a yoke formed in C). The excitation coil 130 is molded and fixed to a resin (in the present embodiment, an epoxy resin) while being mounted in the double ring portion 131a of the stator housing 131.

Here, the stator housing 131 is supported by the hub 110 so as to be rotatable with respect to the hub 110 by a bearing (in this embodiment, a rolling bearing) 132 press-fitted and fixed to the outer peripheral wall of the hub 110. ing. At this time, both the rotor 120 and the stator housing 131 (excitation coil 130) are positioned with reference to the hub 110, so that the stator housing 131 (excitation coil 130) is accurately positioned with respect to the rotor 120.

Incidentally, the bearing 132 has a cylindrical collar 13 disposed so as to be in contact with the axial end of the bearing 127.
3 and the retaining ring 133a are positioned in the axial direction.

Reference numeral 134 denotes a stator housing 131
And a stator plate that supports the stator housing 131 together with the bearing 127 while preventing the stator housing 131 (excitation coil 130) from rotating together with the hub 110. And, as shown in FIG.
As shown in FIG. 2, an arm portion 134 a projecting more radially outward is provided, and as shown in FIG. 2, the elastic member (in this embodiment, an EPDM (ethylene・ Bushing (anti-vibration rubber) 1 consisting of propylene / diene terpolymer rubber))
The engine is fixed to an engine E / G (an engine crank casing or the like) through a pin 35.

Reference numeral 140 denotes a link plate formed of a ferromagnetic material (in this embodiment, S10C) such as an iron-based material having a low carbon content adsorbed on the ring plate (friction plate) 126 of the rotor 120. The armature 140 is connected to the armature 140 and a ring plate (friction plate) by a magnetic field induced by the exciting coil 130.
126 is attracted by the electromagnetic attraction generated between them.

The armature 140 and the ring plate 1
26 has a magnetic flux interrupting portion 140 so that magnetic flux passes between the armature 140 and the ring plate portion 126 in a meandering manner.
a, 126a are provided in a staggered manner,
40a and 126a are configured by means such as providing a gap in the middle of the magnetic path or burying a non-magnetic material.

Reference numeral 141 denotes a substantially triangular plate-shaped leaf spring (spring means) for applying an elastic force for separating the armature 140 from the ring plate portion 126.
As shown in FIG. 3, it is partially connected to the armature 140 by a rivet (fastening means) 141b disposed at the apex thereof, and is connected and fixed in a state where the central portion is prevented from rotating with respect to the hub 110. ing. In this embodiment, a set bolt (hereinafter abbreviated as a bolt) 11 is used.
1 prevents the leaf spring 141 from falling off the hub 110. Incidentally, 141 c is a hole for reducing the elastic coefficient of the leaf spring 141.

A portion 141a of the leaf spring 141 which opposes the armature 140, and the armature 140
As shown in FIG. 4, an elastic material (EPDM in the present embodiment) that absorbs shock is provided on at least one side (the surface of the leaf spring 141 in the present embodiment) of the portion 140b that opposes the leaf spring 141. The second damper member 142 is coated (coated) by flow joining.

The leaf spring 14 of the armature 140
3, a damping steel plate (damping means) 143 for absorbing the vibration of the armature 140
Are bonded with an adhesive.

Here, as shown in FIG. 5, the damping steel plate 143 is a resin layer 1 made of a viscoelastic resin (viscoelastic rubber) having a high viscosity (having a large viscous damping) between two steel plates 143a.
It has a sandwich structure sandwiching 43b, and absorbs vibration of the armature 140 by a vibration system composed of the mass of the steel plate 143a and the spring characteristics and viscous damping force of the resin layer 143b. Although three damping steel plates 143 appear to be present in FIG. 3, they are actually integrated by a ring portion 143 c fitted on the outer peripheral wall of the armature 140 as shown in FIG. 2.

The armature 14 of the pulley 121
By extending the axial end 121a on the 0 side from the friction surface 140c to the leaf spring 141 side, the armature 14
0 is covered by a pulley 121,
The axial end portion 121a is formed in a ring shape surrounding the armature 140, and has a substantially concave cross-sectional shape that is depressed in the axial direction such that a wall surface 151 that is substantially parallel to the axial direction is formed. Having a circumferential groove 150.
Here, the friction surface 140c is a portion (surface) of the armature 140 that faces the ring plate portion (friction plate) 126.
Say

The inner peripheral side wall surface 14 of the armature 140
0c is opposite to the friction surface 140c (left side in FIG. 2).
The tapered portion 140d is provided such that the diameter of the inner peripheral side wall surface 140c increases as going toward.

Next, the electromagnetic clutch 10 according to this embodiment will be described.
The general operation of 0 will be described.

The energization of the excitation coil 130 is stopped (OF
F), the leaf spring 141 is in a natural state (in this embodiment, a flat state that is not curved as shown in FIG. 2), and the distance between the armature 140 and the ring plate (friction plate) 126 is increased. (In this embodiment, about 0.5 mm), the gap δ is secured, and the transmission of the driving force from the hub 110 to the rotor 120 is cut off.

On the other hand, when the excitation coil 130 is energized (ON), the armature 140 and the ring plate (friction plate) 1 are caused by the magnetic field induced by the excitation coil 130.
26, an electromagnetic attraction force is generated, the leaf spring 141 is bent, and the armature 140 is rotated by the rotor 120 (the ring plate portion 12).
6), the driving force is transmitted from the hub 110 to the rotor 120.

The armature 140 is connected to the rotor 120
While being adsorbed to the (ring plate portion 126), a gap is generated between the armature 140 and the leaf spring 141,
On the other hand, while the armature 140 is separated from the rotor 120, the armature 140, the leaf spring 141 and the rivet 14
1b.

Next, the electromagnetic clutch 10 according to this embodiment will be described.
The assembly procedure of No. 0 will be outlined in the order of the steps.

First, after the bearing 127 is press-fitted and fixed to the hub 110, the rotor 120 is press-fitted and fixed to the bearing 127, and the retaining ring 128 is attached to the rotor 120. Next, color 13
3 is mounted on the hub 110, and the bearing 132 is press-fitted and fixed to the hub 110, so that the stator housing 131 in which the bearing 132 is press-fitted and fixed is assembled to the hub 110,
The retaining ring 133a is mounted on the hub 110. Then, the bolt 111 is attached, and the leaf spring 141 and the armature 140 are attached.
Is fixed to the hub 110.

Next, the features (effects) of this embodiment will be described.

According to the present embodiment, the substantially concave cross-sectional shape that is depressed in the axial direction is formed in a ring shape surrounding the armature 140 so that the wall surface 151 that is substantially parallel to the axial direction is formed. Since the circumferential groove 150 is formed, even if oil drops on the electromagnetic clutch 100 at the time of engine inspection or addition of engine oil, the dropped oil does not flow to the friction surface 141c side. Fifteen
It flows downward along 0 (wall surface 151) and drops from the electromagnetic clutch 100.

The oil adhering to the head of the bolt 111 tends to flow along the inner peripheral side wall surface 140c of the armature 140 toward the friction surface 141c.
In addition to the electromagnetic clutch 100 being mounted on the engine E / G (crankshaft) so that the axial direction of 00 (armature 140) is substantially horizontal, the inner peripheral side wall surface 140c is opposite to the friction surface 141c. As you go to the side,
The tapered portion 1 such that the diameter of the inner peripheral side wall surface 140c increases.
Since 40d is provided, the oil that has reached the inner peripheral side wall surface 140c does not flow to the friction surface 141c side,
It flows to the opposite side of the friction surface 141c and drops from the electromagnetic clutch 100.

Therefore, even if oil drops on the electromagnetic clutch 100 at the time of checking the engine or adding engine oil, it is possible to prevent the dropped oil from adhering to the friction surface 141c.

The armature 14 of the leaf spring 141
0, the second damper member 14
2, the armature 140 and the leaf spring 141 can be prevented from directly colliding with each other when the electromagnetic clutch 100 is disengaged (when the electromagnetic clutch 100 is turned off). It is possible to suppress the generation of an interference sound (chattering sound) when turning off.

As described above, when the electromagnetic clutch 100 is disengaged, the second damper 142
Since interference noise generated when the 0 and the leaf spring 141 collide is reduced, if the thickness of the second damper member 142 is set to approximately 50 μm or more, a sufficient effect can be obtained in practical use.

The armature 140 has a damping steel plate 143.
Is fixed, the vibration of the armature 140 can be absorbed (attenuated).
It is possible to reduce abnormal noise caused by zero vibration.

The stator plate 134 is connected to the engine E / G via a bushing 135 made of an elastic member.
Since it is fixed to the engine (e.g., engine crank casing), the relative vibration displacement of the stator housing 131 (excitation coil 130) with respect to the rotor 120 can be absorbed by the vibration of the engine E / G. Therefore, the clearance between stator housing 131 and rotor 120 can be maintained at an appropriate value, so that an increase in magnetic resistance between stator housing 131 and rotor 120 can be prevented, and armature 140 and rotor 12 can be prevented from increasing.
It is possible to prevent the electromagnetic attraction force acting between zero and zero from decreasing.

Since the collar 133 is provided between the bearing 132 and the bearing 127, the relative position between the bearing 132 and the bearing 127 is easily maintained while maintaining the relative positional relationship (the bearing 132). Can be prevented from moving with respect to the bearing 127).

(Other Embodiments) In the above-described embodiment, the second damper member 142 is covered with the leaf spring 141, but the present invention is not limited to this, and the leaf spring 141 of the armature 140 is not limited to this. Site 14 against
0a may be coated.

In the above-described embodiment, the second damper member 142 is fixed to the leaf spring 141 by vulcanization. However, the present invention is not limited to this. Alternatively, mechanical means such as rivets or the like may be used.

In the above embodiment, the damping steel plate 14
Although the vibration damping means for absorbing the vibration of the armature 140 is constituted by 3, the present invention is not limited to this.
For example, the vibration damping means may be made of rubber (for example, EPDM). In this case, in order to obtain a sufficient vibration damping effect, the thickness of the rubber is desirably 2 mm or more.

In the above embodiment, the damping steel plate 14
3 is bonded, but the present invention is not limited to this.
3 may be fixed to the armature 140.

In the above embodiment, the friction surface 141
c to prevent oil from adhering to the circumferential groove 1
Although both 50 (wall surface 151) and the tapered portion 140d are provided, only one of them may be provided.

In the above-described embodiment, the bearing 132 is provided between the stator housing 131 and the hub 110. However, the present invention is not limited to this. Good. In this case, the bushing 135 has at least two arm portions 134a.
It is necessary to fix the stator housing 131 to a fixing member such as the engine E / G via the above.

In the above embodiment, the bearing 132
Has been positioned in the axial direction by being sandwiched between the collar 133 and the retaining ring 133a disposed so as to contact the axial end of the bearing 127, but the present invention is not limited to this. For example, a stepped portion is formed such that the diameter of the portion of the hub 110 into which the bearing 132 is press-fitted is smaller than the diameter of the portion of the hub 110 into which the bearing 127 is press-fitted. May be positioned to position the bearing 132.

In the above-described embodiment, the present invention is applied to the electromagnetic clutch mounted on the crankshaft of the engine and transmitting the driving force to the compressor 200. However, the present invention is not limited to this. It can be applied to other uses.

In the above embodiment, the driving force is input from the hub 110 and the pulley 121 (rotor 120)
Although the driving force is output to the side, the present invention is not limited to this, and the driving force may be input from the pulley 121 (rotor 120) side and output to the hub 110 side. .

In the above-described embodiment, the hub 110 serving as the driving-side rotating member and the rotor 12 serving as the driven-side rotating member are used.
0 is coaxially parallel with bearing 127 (double cylindrical)
However, both 110 and 120 may be coaxially arranged in series.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a power transmission system using an electromagnetic clutch according to an embodiment of the present invention.

FIG. 2 is a sectional view of an electromagnetic clutch according to the embodiment of the present invention.

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is an enlarged view of a portion A in FIG. 2;

FIG. 5 is a cross-sectional view of a damping steel plate employed in the electromagnetic clutch according to the embodiment of the present invention.

[Explanation of symbols]

110: center hub (drive side rotating body), 120: rotor (driven side rotating body), 121: pulley, 122: second damper member, 130: exciting coil, 131: stator housing (holding member), 140: armature, 140d
... taper portion, 135 ... bushing, 141 ... leaf spring (spring means), 142 ... second damper member, 143 ... damping steel plate (damping means), 150 ... circumferential groove.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akira Kishibuchi 1-1-1, Showa-cho, Kariya-shi, Aichi Pref. Inside DENSO Corporation (72) Inventor Naoji Konaga 1-1-1, Showa-cho, Kariya-shi, Aichi Pref. (72) Inventor Katsuya Dotsutsu 1-1-1, Showa-cho, Kariya-shi, Aichi Pref.

Claims (6)

[Claims] 1. An electromagnetic clutch for transmitting a driving force of a drive source (E / G) to a driven device (200) that can be intermittently driven, wherein a drive-side rotary member is rotationally driven by the drive source (E / G). (110), a driven-side rotating member (120) that is connected to the driven device (200) and rotates, and an excitation coil (13) that generates a magnetic field when energized.
0) and an electromagnetic force caused by a magnetic field induced by the exciting coil (130), which is connected to the member (110) on one of the driving side rotating member (110) and the driven side rotating member (120). An armature (140) that is attracted to the other-side member (120) and transmits a driving force from the driving-side rotating member (110) to the driven-side rotating member (120), and the rotation axis of the armature (140) is The rotating members (110, 120) and the armature (140) are installed so as to be substantially horizontal, and a ring shape is formed on the outer diameter side of the armature (140) so as to surround the armature (140). An electromagnetic clutch, wherein a wall surface (151) formed and substantially parallel to the rotation axes of the two rotation members (110, 120) is provided. 2. An electromagnetic clutch for transmitting a driving force of a drive source (E / G) to a driven device (200) that can be intermittently driven, wherein the drive-side rotating member is rotationally driven by the drive source (E / G). (110), a driven-side rotating member (120) that is connected to the driven device (200) and rotates, and an excitation coil (13) that generates a magnetic field when energized.
0) and an electromagnetic force caused by a magnetic field induced by the exciting coil (130), which is connected to the member (110) on one of the driving side rotating member (110) and the driven side rotating member (120). An armature (140) that is attracted to the other-side member (120) and transmits a driving force from the driving-side rotating member (110) to the driven-side rotating member (120), and the rotation axis of the armature (140) is The two rotating members (110, 120) and the armature (140) are installed so as to be substantially horizontal, and a ring shape is arranged on the outer diameter side of the armature (140) so as to surround the armature (140). Formed in the
An electromagnetic clutch, wherein a circumferential groove (150) having a substantially concave cross-sectional shape is provided to be depressed in the direction of the rotation axis of the rotating members (110, 120). 3. An electromagnetic clutch for transmitting a driving force of a driving source (E / G) to a driven device (200) that can be intermittently driven, wherein the driving side rotating member is driven to rotate by the driving source (E / G). (110), a driven-side rotating member (120) that is connected to the driven device (200) and rotates, and an excitation coil (13) that generates a magnetic field when energized.
0) and an electromagnetic force generated by a magnetic field induced by the exciting coil (130), which is connected to the member (110) on one of the driving side rotating member (110) and the driven side rotating member (120). A link plate-shaped armature (140) having a friction surface (141c) which is attracted to the other member (120) and transmits a driving force from the driving-side rotating member (110) to the driven-side rotating member (120); The two rotating members (110, 120) and the armature (140) are installed such that the rotation axis of the armature (140) is substantially horizontal, and the inner peripheral wall surface (140c) of the armature (140) is provided. Is provided with a tapered portion (141d) such that the diameter of the inner peripheral side wall surface (140c) increases toward the opposite side to the friction surface (141c). Electromagnetic clutch, characterized. 4. An outer diameter side of the armature (140) is depressed in a rotation axis direction of the two rotating members (110, 120) formed in a ring shape so as to surround the armature (140). 4. A circumferential groove (150) having a substantially concave cross-sectional shape.
The electromagnetic clutch according to 1. 5. The circumferential groove (150) is formed on an axial end face (121a) of a cylindrical member (121) disposed so as to cover an outer peripheral side of the armature (140). The electromagnetic clutch according to claim 2 or 4, wherein 6. The drive source (E / G) is an internal combustion engine, and the drive-side rotating member (110) is connected to the drive source (E / G).
The electromagnetic clutch according to any one of claims 1 to 5, wherein the electromagnetic clutch is connected to the crankshaft (G).