JP2002048152A - Electromagnetic control spring clutch mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic control spring clutch mechanism which does not constitute a magnetic circuit in bearing region. SOLUTION: The clutch mechanism is so constructed that a coupling 108 and a bearing 122 forming an input side of bearing are made of resin, and a shat 10 and an annular sidewall 56 forming an output side of bearing are also made of resin, and then a magnetic circuit as shown in dotted line W is formed, thereby no magnetic circuit is constituted as in a bearing part of conventional construction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rotary input member and a rotary output member which are connected when an electromagnetic coil is energized,
The present invention relates to an electromagnetic control spring clutch mechanism of a type in which the connection between a rotation input member and a rotation output member is released when an electromagnetic coil is deenergized.

[0002]

2. Description of the Related Art An electromagnetically controlled spring clutch mechanism disclosed in Japanese Patent Laid-Open Publication No. Hei 3-125034 will be described with reference to FIG. The conventional electromagnetic control spring clutch mechanism includes a rotation output member 302, a rotation input member 304, an armature assembly 306, a coil spring 308, and an electromagnetic coil assembly 310.

[0003] The rotation output member 302 has a shaft portion 312 extending in the axial direction. An output boss 3 provided at a substantially central portion in the axial direction of the shaft portion 312 has a larger diameter than other portions.
14 are provided. Adjacent to the output boss 314, the shaft portion 312 is provided with a mounting portion 316 having a diameter slightly smaller than that of the output boss 314. A rotor 318 made of an annular member is press-fitted into the mounting portion 316.
The rotor 318 is provided with three arc-shaped openings 320. At one end of the shaft portion 312, a screw hole 322 extending in the radial direction is formed. The shaft portion 312 and the rotor 318 constituting the rotation output member 302 are made of a magnetic material.

[0004] The rotation input member 304 includes a bushing 326 having a substantially cylindrical shape. An annular locking ring 328 is press-fitted and fixed substantially at the center of the bushing 326 in the axial direction. The portion of the bushing 326 on the left side of the annular locking ring 328 in the figure is the output boss 3 of the rotary output member 302.
The input boss 330 is arranged adjacent to the input boss.

The input boss 330 has a locking hole 332 extending in the radial direction. The portion of the bushing 326 on the right side of the annular locking ring 328 in the figure is provided with two arc-shaped projections 334 projecting in the axial direction at intervals in the circumferential direction.

[0006] The input member 304 also includes a gear 336. An opening 338 is formed at the center of the gear 336, and the opening 338 is formed in the arc-shaped projection 3 of the bushing 326.
There are two arcuate extensions 340 corresponding to 34. The bushing 326 connects the tip of the input boss 330 to the output boss 3.
14 and is rotatably mounted on the shaft 312 of the output member 302. The gear 336 is mounted so as to be integral with the bushing 326 at the right end of the bushing 326. The input member 304 is made of a magnetic material, and the gear 336 may be made of either a magnetic material or a non-magnetic material.

[0007] The amateur assembly 306 includes an amateur 3
44, a spring member 346 and a support member 348. The amateur 344 is annular, and has three connection holes 350 penetrating in the axial direction at equal intervals in the circumferential direction.
Are perforated. Further, three substantially circular notches 3 located between the connection holes 350 are provided on the inner peripheral edge of the amateur 344.
52 are formed. The amateur 344 is made of a magnetic material.

The spring member 346 is formed of a substantially annular leaf spring, and is provided with three connection holes 354 penetrating in the axial direction at equal intervals in the circumferential direction. Spring member 34
6, three substantially circular protrusions 356 projecting radially inward between the connection holes 354 are formed on the inner peripheral edge of the connection hole 354. A connection hole 358 that penetrates in the axial direction is also formed in the protrusion 356.

The support member 348 has an annular main portion 360.
And a cylindrical projection 362 protruding from the inner circumference of the main portion 360 to one side in the axial direction. The main portion 360 has three connection holes 3 penetrating in the axial direction at equal intervals in the circumferential direction.
64 are perforated. In addition, three substantially circular notches 3 located between the connection holes 364 are provided on the outer peripheral edge of the main portion 360.
66 are formed. Further, the support member 348 includes
A locking notch 368 extending from the inner peripheral edge to the vicinity of the outer peripheral edge of the main portion 360 in the radial direction is also formed. Support member 3
48 is made of a non-magnetic material.

[0010] The armature 344 and the spring member 346 are
By connecting and fixing rivets (not shown) in the connection holes 350 of the amateur 344 and the connection holes 354 of the spring member 346, they are connected to each other.

The support member 348 and the spring member 346 are connected to each other by inserting and fixing a rivet (not shown) in the connection hole 364 of the support member 348 and the connection hole 358 of the spring member 346. Thus, the armature 344 and the support member 348 are connected to each other via the spring member 346.

The armature 344 and the support member 348 are
When mutually connected via the spring member 346, the cylindrical projection 362 of the support member 348 passes through the spring member 346 and the armature 344, and projects to the left beyond the armature 344.

An armature assembly 306 comprising an armature 344, a spring member 346, and a support member 348
Is mounted on an output boss 314 formed on a shaft 312 of the output member 302. Cylindrical projection 362 of support member 348 projecting to the left beyond amateur 344
Abuts against one surface of the rotor 318 in the output member 302. In this state, there is a slight gap between the armature 344 and the rotor 318.

The coil spring 308 is formed by spirally winding a spring wire having an appropriate cross-sectional shape such as a rectangular shape in a direction that advances leftward as it turns clockwise when viewed from the right. The inner diameter of the coil spring 308 is provided so as to correspond to the outer diameter of the output boss 314 of the output member 302 and the input boss 330 of the input member 304.
At the right end of the coil spring 308, a locking protrusion 370 protruding inward in the radial direction is formed, and at the left end, a locking protrusion 372 protruding outward in the radial direction is formed.

One locking projection 37 of the coil spring 308
0 is inserted into the locking hole 332 formed in the bushing 326 of the input member 304, and thereby the coil spring 30
8 is locked to the input member 304.

The other locking projection 37 of the coil spring 308
2 is inserted into the locking notch 368 formed in the support member 348 of the armature assembly 306, so that the other end of the coil spring 308 is locked to the armature assembly 306.

The electromagnetic coil assembly includes a bobbin 374 and an electromagnetic coil 376 housed in the bobbin 374. The bobbin 374 includes a cylindrical inner peripheral wall 378 and annular side walls 380, 3 provided at both ends of the cylindrical inner peripheral wall 378.
The outer peripheral surface between the annular side walls 380 and 382 is open.

The bobbin 374 further includes an annular side wall 380.
Cylindrical additional wall 384 protruding axially outward from the outer surface of the
And an annular additional wall 385 extending radially outward from the distal end of the cylindrical additional wall 384.

The electromagnetic coil assembly 310 further includes a casing 388. The casing 388 includes a mounting sleeve 390, a casing body 392, and an end plate 39.
4 and a mounting plate 396.

A step is formed on the outer peripheral surface of the cylindrical mounting sleeve 390, the outer diameter of the right half 398 is relatively small, and the outer diameter of the left half 400 is relatively large. . The inner diameter of the mounting sleeve 390 is
4 corresponds to the outer diameter of the bushing 326.

The casing body 392 has a cylindrical wall 402 having a relatively large diameter and a cylindrical shape, and an end wall 404 located at the right end of the cylindrical wall 402. Casing body 392
A circular opening 406 is formed at the center of the end wall 404. The inner diameter of the circular opening 406 is
It corresponds to the outer diameter of the right half 398 of the 90. At a predetermined position of the cylindrical wall 402 of the casing body 392, a hole 408 that penetrates in the radial direction is formed, and a guide member 410 is mounted in the hole 408. A guide hole 412 is formed in the guide member 410, and the connecting portion 386 of the electromagnetic coil 376 passes through the guide hole 412 and passes through the casing 388.
Extended outside.

At the tip of the cylindrical wall 402 of the casing body 392, four arc-shaped projections 414 projecting in the axial direction at equal intervals in the circumferential direction are formed.

The mounting plate 396 of the casing 388 has a disk shape, and the outer diameter of the right half 416 is relatively large.
The outer diameter of 18 is relatively small. A circular opening 420 is formed at the center of the mounting plate 396. This circular opening 420
Correspond to the outer diameter of the left end of the shaft 312 of the output member 302. The outer periphery of the left half portion 418 of the mounting plate 396 is notched in a chordal shape at two portions diametrically opposed to each other, and a linearly extending locking portion 422 is formed.

The end plate 394 of the casing 388 has a substantially annular shape, and four arcuate cutouts 424 are formed on the outer peripheral edge thereof at equal intervals in the circumferential direction. This arc-shaped notch 424
Are provided corresponding to the arc-shaped projections 314 of the casing body 392. A locked piece 426 extending radially outward is also formed on the end plate 394. An opening 428 is formed in the center of the end plate 394. This opening 428
Has a shape corresponding to the outer diameter of the left half portion 418 of the mounting plate 396, and linearly extending locking portions 430 are formed at two diametrically opposed portions.

In the casing 388, the mounting sleeve 390, the casing main body 392, and the end plate 394 are made of a magnetic material, and the mounting plate 396 is made of a non-magnetic material. After all the components are assembled, the retaining ring 342 is fitted into the tip of the shaft 312 of the rotation output member 302.

The operating principle of the electromagnetically controlled spring clutch mechanism having the above configuration is that when a driving source (not shown) to which the gear 336 of the input member 304 is drivingly connected is energized, the input member 304 including the gear 336 , Rotate clockwise when viewed from the right. Such rotation of the input member 304 causes the armature assembly 306 to rotate clockwise as viewed from the right side via the coil spring 8.

When the electromagnetic coil 376 is de-energized, the armature 344 of the armature assembly 306 is separated from the rotor 318 of the output member 302;
The output member 302 including the rotor 318 is kept stationary without rotating.

When the electromagnetic coil 376 is energized, the entire output member 302, the bushing 326 of the input member 304,
Since the mounting sleeve 390 of the casing 388, the casing body 392, and the armature 344 of the armature assembly 306 are magnetic materials, a magnetic field is generated through a magnetic path formed by the magnetic material. as a result,
The magnetic attraction generated between the rotor 318 of the output member 302 and the armature 344 causes the spring member 346 of the armature assembly 306 to be elastically deformed, causing the armature 344 to move toward the rotor 318 and cause the armature to move. 344 is attracted to the rotor 318.

When the armature 344 is attracted to the rotor 318, the output member 302 and the armature assembly 306 are connected to each other, and one end of the coil spring is locked to the support member 348 of the armature assembly 306 according to the rotation of the armature assembly 306. 8 is blocked. Thus, the input member 304 to which the other end of the coil spring 308 is locked
The coil spring 308 contracts due to the rotational force applied to the coil spring 308 from the above. As a result, the coil spring 308 is sufficiently tightly wound around the input boss 330 of the input member 304 and the output boss 314 of the output member 302, and the input boss 330 and the output boss 314 are connected by the coil spring 308.

As described above, by the coil spring 308,
By connecting the input boss 330 and the output boss 314, the input member 304 is connected to the output member 302, and the coil spring 308, the armature assembly 306, and the output member 302 are integrated with the input member 304. ,
It will rotate clockwise when viewed from the right.

When the electromagnetic coil 376 is deenergized, the armature 344 returns to its original position due to the elastic restoration of the spring member 346 of the armature assembly 306, and the armature 344 is turned off.
Reference numeral 44 denotes a state where the output member 302 is separated from the rotor 318.

[0032]

However, in the electromagnetically controlled spring clutch mechanism having the above structure,
The following problems can be raised.

(First Problem) In the case of the electromagnetically controlled spring clutch mechanism having the above-described structure, it is necessary to generate a magnetic attraction between the rotor 318 and the armature 344, so that the entire output member 302 and the input A bushing 326 for the member 304, a mounting sleeve 390 for the casing 388,
Further, the casing body 392 and the armature 344 of the armature assembly 306 are made of a magnetic material and constitute a magnetic path. However, bushing 32
6 and the mounting sleeve 390, a bearing area is formed. In this area, the biasing of the bushing 326 occurs due to the magnetic force. When the bushing 326 rotates, the bushing 326 abuts on the mounting sleeve 390. And adversely affect the durability of the bushing 326 and the mounting sleeve 390.

(Second Problem) As described above, the rotor 31
Since it is necessary to generate a magnetic attractive force between the armature 8 and the armature 344, the output member 302 is generally formed of an iron-based sintered alloy member. However, in the case of a sintered alloy member, since burrs and burrs are generated, it is necessary to remove the burrs and burrs. Therefore, a high cost is required for manufacturing the shaft. As a result, there is a problem that the entire manufacturing cost of the electromagnetic control spring clutch mechanism is increased.

(Third Problem) In the case of the electromagnetically controlled spring clutch mechanism having the above-described configuration, the armature assembly 306 is used.
Is composed of an armature 344, a spring member 346, and a support member 348. Since these parts have complicated shapes, the manufacturing cost is high, and the cost of the entire electromagnetically controlled spring clutch mechanism is high. It is something to do. Further, the spring member 346 and the coil spring 308 are used as components for generating the elastic force in the axial direction, but if these components can be configured as one component, the number of components can be reduced.

(Fourth Problem) In the case of the electromagnetically controlled spring clutch mechanism having the above configuration, the coil spring 308 is fixed to the bushing 326 as the input member 304, and the coil spring 308 is sufficiently attached to the output boss 314 of the output member 302. By being tightly wound, the input boss 330 and the output boss 314 are connected. Therefore, the input member 30
When 4 is in the rotating state, the coil spring 308 is always in the rotating state. Therefore, when the coil spring 308 is inclined by an external force or the like while the electromagnetic coil 376 is in the deenergized state, the coil spring 308 comes into contact with the output boss 314 and damages the outer peripheral surface of the output boss 314. Roughness may cause a problem that the coil spring 308 comes into contact with the outer peripheral surface of the output boss 314 to cause a malfunction to rotate the output member 302.

Accordingly, it is an object of the present invention to provide an electromagnetically controlled spring clutch mechanism which does not form a magnetic path in the bearing area.

Another object of the present invention is to provide an electromagnetically controlled spring clutch mechanism having a coupling structure that does not damage the outer peripheral surface of the input rotary member or the output rotary member.

Still another object of the present invention is to reduce the manufacturing cost of the electromagnetically controlled spring clutch mechanism.
An object of the present invention is to provide an electromagnetic control spring clutch mechanism.

[0040]

In an electromagnetically controlled spring clutch mechanism according to the present invention, an input side rotating member, an output side rotating member, and the input side rotating member and the output side rotating member are connected to each other. Or an electromagnetic control spring clutch mechanism comprising: an armature assembly for bringing the armature assembly into a non-coupled state; and an electromagnetic coil assembly for controlling the armature assembly in a coupled state and a disconnected state. Has a first input rotating member made of a non-magnetic material and a second input rotating member made of a magnetic material fitted on the first input rotating member, and the output-side rotating member is made of a non-magnetic material. A first output rotating member,
It has a second output rotation member made of a magnetic material fitted on the output rotation member, and the second input rotation member and the second output rotation member constitute a part of a magnetic path.

According to this configuration, the bearing region can be made of a member made of a non-magnetic material, and a magnetic path is not formed in the bearing portion as in the conventional structure. As a result, a periodic contact noise of the metal due to the rotation of the shaft does not occur, and the silentness of the electromagnetic control spring clutch mechanism can be improved. Further, since the first input rotary member and the first output rotary member are made of a non-magnetic material, generation of a thrust load due to magnetism is avoided, and it is possible to reduce torque during rotation.

When a resin product is used as the non-magnetic material, the ratio of the resin product increases, and the electromagnetic control spring clutch mechanism can be reduced in weight.

Conventionally, the first output rotating member and the second
The output-side rotary shaft and the like constituted by the output rotary member were generally formed of an iron-based sintered alloy member. However, as in this configuration, a magnetic member and a non-magnetic member By applying the combination structure, the second output rotating member made of a magnetic member, which is provided for forming the magnetic path, can adopt a ring shape divided in the axial direction. Since the output rotary member can be formed entirely by press working, it is possible to reduce the manufacturing cost of the electromagnetically controlled spring clutch mechanism.

Preferably, in the above invention, the second input rotary member is connected to a shaft fitted on the first output rotary member, and is controlled by a connection state and a non-connection state of the electromagnetic coil assembly. An annular plate provided on the armature assembly to which the armature is attached is provided integrally. As described above, by forming the input rotary member with the first input rotary member and the second input rotary member, the shaft of the second input rotary member and the annular plate can be provided integrally, and the electromagnetic force can be increased. The manufacturing cost of the control spring clutch mechanism can be reduced.

[0045]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electromagnetic control spring clutch mechanism according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view showing the structure of the electromagnetic control spring clutch mechanism, and FIG. 2 is an exploded perspective view showing components of the electromagnetic control spring clutch mechanism.

(Configuration of Electromagnetic Control Spring Clutch Mechanism) FIG.
Referring to FIG. 2 and FIG. 2, the components of the electromagnetic control spring clutch mechanism in the present embodiment include a rotation output assembly 2, an electromagnetic coil assembly 4, an armature assembly 6, and a rotation input assembly 8.

(Structure of Rotary Output Assembly 2) The rotary output assembly 2 has a shaft 10, a first hub group 20, a second hub 28, and a third hub group 92 which form an output-side rotating member. The shaft 10 includes a head portion 12 having a relatively large outer diameter, and a shaft portion 14 having an outer diameter smaller than the outer diameter of the head portion 12. On the outer peripheral surface of the shaft portion 14, chamfered regions 16 are provided at two opposing positions along the axial direction. Further, a ring-shaped groove 18 for fitting a retaining ring described later is formed in a tip portion (left side in FIG. 2) of the shaft portion 14. The shaft 10 is made of a resin material that is a non-magnetic material, and is made of, for example, polyplastics.

The first hub group 20 includes three ring plates 22. The ring-shaped plate 22 is connected to the shaft 10.
Has an opening 24 through which the shaft 14 is inserted. The opening 24 is provided with two linearly extending locking portions 26 at positions corresponding to the chamfered area 16 of the shaft portion 14 in order to suppress rotation of the ring-shaped plate 22 with respect to the shaft portion 14. . The ring-shaped plate 22 is formed from a magnetic material, for example, SECE or the like. Further, it can be formed by press working. Although three ring-shaped plates 22 are used as the first hub group 20, the number of ring-shaped plates 22 is determined by design matters, and an optimal number is appropriately selected.

The second hub 28 has substantially the same outer diameter as the ring-shaped plate 22 and has an opening 30 through which the shaft 14 of the shaft 10 is inserted. The opening 30 has a second
In order to suppress the rotation of the hub 28 with respect to the shaft 14, two linearly extending locking portions 32 are provided at positions corresponding to the chamfered area 16 of the shaft 14. Also, the second hub 2
A notch 34 extending in the radial direction is provided on the outer peripheral surface of the nozzle 8. The second hub 28 is formed from a magnetic material, for example, SECE or the like. Further, it can be formed by press working. The first hub group 20 and the second hub 28 are inserted through the shaft portion 14 of the shaft 10 as shown in FIG.

The third hub group 92 includes three ring-shaped plates 94. The ring-shaped plate 94 is connected to the shaft 10.
Has an opening 96 through which the shaft 14 is inserted. The opening 96 is provided with two linearly extending locking portions 98 at positions corresponding to the chamfered area 16 of the shaft portion 14 in order to suppress rotation of the ring-shaped plate 94 with respect to the shaft portion 14. . The ring-shaped plate 94 is formed of a magnetic material, for example, SECE or the like. Further, it can be formed by press working. Although three ring-shaped plates 94 are used as the third hub group 92, the number of ring-shaped plates 94 is determined by design considerations, and an optimal number is appropriately selected.

(Configuration of Electromagnetic Coil Assembly 4) The electromagnetic coil assembly 4 includes a field plate 36 and a coil assembly 4.
8, a bobbin cover 60, and a plate 68.
The field plate 36 includes a main plate 38, and auxiliary plates 40 and 42 that are bent at right and left directions from the main plate 38 at both ends of the main plate 38. The main plate 38 is provided with an opening 44 having an inner diameter through which the first hub group 20 and the second hub 28 can pass. Outside the opening 44 of the main plate 38, four arc-shaped openings 46 having a substantially long hole shape are provided at equal intervals in the circumferential direction. The field plate 36 is formed of a magnetic material, for example, SECE or the like. Further, it can be formed by press working.

The coil assembly 48 includes a cylindrical shaft 50,
Annular side walls 52, 5 provided at both ends of a cylindrical shaft portion 50
4 inclusive. Inside the cylindrical shaft portion 50, a space capable of accommodating the first hub group 20 and the second hub 28 is secured. The annular side wall 52 disposed on the field plate 36 side includes:
Four arc-shaped projections 56 having an outer shape corresponding to the shape of the arc-shaped opening 46 are provided at four positions at equal intervals in the circumferential direction at positions where the arc-shaped projections are fitted to the arc-shaped opening 46 provided in the main plate 38. A coil wire 58 is wound around the outer peripheral surface of the cylindrical shaft portion 50. Cylindrical shaft 50 and annular side wall 5
2, 54 are made of a resin material which is a non-magnetic material,
For example, polyplastics or the like is used.

The bobbin cover 60 includes a cylindrical portion 62 in which the coil assembly 48 can be housed. Both ends of the cylindrical portion 62 are open, and a notch 64 extending in the axial direction is provided at one end portion.
Is provided. The notch 64 is used when the coil wire 58 is drawn out. The bobbin cover 60 is made of a resin material that is a non-magnetic material, and is made of, for example, polyplastics. The electromagnetic coil assembly 4
As shown in FIG. 1, it is arranged so as to surround the first hub group 20, the second hub 28, and a square spring 84 described later.

The plate 68 includes a main plate 70,
The main plate 70 includes a cylindrical portion 62 of the bobbin cover 60.
An opening 72 is provided which is smaller than the inner diameter of the armature and larger than the outer diameter of the armature 76 described later. At four corners of the main plate 70, connection holes 74 formed in the axial direction are formed.
Are provided at four places. The plate 68 is formed of a magnetic material, for example, SECC or the like. Further, it can be formed by press working.

(Structure of the armature assembly 6) The armature assembly 6 has an armature 76 and a square spring 84. The amateur 76 includes a circular plate 78 having an outer diameter smaller than the inner diameter of the opening 72 in the plate 68. The circular plate 78 is provided with an opening 80 through which the shaft 14 of the shaft 10 can pass. The opening 80
Projecting toward the plate 68 side so as to surround the
A rectangular projection 82 is provided. The square spring 84 side of the square convex portion 82 forms a concave portion that can receive a square spring portion 90 of the square spring 84 described later. The armature 76 is formed of a magnetic material, for example, SECE
Are used. Further, it can be formed by press working.

The square spring 84 is connected to the opening 8 of the amateur 76.
Coil-shaped shaft portion 86 having an outer diameter smaller than the outer diameter 0
And a locking protrusion 88 provided at one end of the shaft portion 86 and extending in the radial direction, and a square spring portion 90 provided at the other end of the shaft portion 86 and formed in a square shape. The shaft portion 86 is formed by spirally winding a spring wire having an appropriate cross-sectional shape such as a rectangular shape in a direction in which the spring wire advances leftward as it turns counterclockwise when viewed from the right. A locking projection 88 provided at one end of the square spring 84 is locked in the notch 34 of the second hub 28 and a square spring portion 90 provided at the other end.
Are locked in the opening 80 of the amateur 76. The angular spring 84 is formed from a magnetic material, for example,
SWC or the like is used. Further, it can be formed by press working.

Since the shape of the square spring portion 90 is selected to be locked to the amateur 76, the shape of the convex portion 82 and the square spring portion 90 provided on the amateur 76 is square. The shape is not limited to this, and any shape may be used as long as the shape has three or more points protruding in the radial direction.

An armature spring 84 is mounted on the armature assembly 6 so as to cover the third hub group 92. Further, since the armature 76 is always in contact with the annular side wall 54 of the electromagnetic coil 48, the square spring 8 is set so that an elastic force acts on the square spring 84.
4 is incorporated to be somewhat longer than the natural length. Therefore, when the electromagnetic coil 48 is deenergized, the armature 76 is connected to the annular plate 1 of the rotor 100 described later.
04 and a certain gap.

(Structure of Rotation Input Assembly 8) The rotation input assembly 8 includes a rotor 100, a joint 10 and an input rotation member.
8, a bearing 122, a gear 140, and a retaining ring 150. The rotor 100 has a cylindrical shaft portion 102 having an outer diameter smaller than the outer diameter of the ring-shaped plate 94 and larger than the inner diameter of the opening 96 of the ring-shaped plate 94, and a radial direction from one end of the cylindrical shaft portion 102. And an annular plate 104 protruding so as to protrude. The annular plate 104 is provided with three protrusions 106 at equal intervals in the circumferential direction. The cylindrical shaft portion 102 of the rotor 100 and the annular plate 1
04 is formed integrally and is made of a magnetic material. For example, SECE is used.

The joint 108 allows the shaft portion 14 of the shaft 10 to pass therethrough, and a cylindrical shaft portion 110 fitted inside the cylindrical shaft portion 102 of the rotor 100, and a radial direction from one end of the cylindrical shaft portion 110. And an annular plate 112 that protrudes to protrude. The annular plate 112 is provided with three slits 114 each having a substantially elongated hole shape corresponding to the shape of the protrusion 106 at equal positions in the circumferential direction at positions where the protrusions 106 are fitted. On the opposite side of the annular plate 112 from the cylindrical shaft portion 110, a cylindrical portion 116 having a relatively large outer diameter is provided, and a distal end portion of the cylindrical portion 116 has an arc-shaped projection 120 projecting in the axial direction. Are provided at two locations at opposite positions in the radial direction. The joint 108 is made of a resin material that is a nonmagnetic material, and is made of, for example, polyplastics.

The bearing 122 includes a main plate 124.
The main plate 124 has a cylindrical portion 116 of the joint 108.
An opening 126 having an inside diameter capable of receiving the annular plate 112 is provided, and a recess 128 for accommodating the annular plate 112 of the joint 108 is provided in an outer peripheral portion of the opening 126.
At the four corners of the main plate 124, the armature assembly 6
Four connection projections 130 are provided to fit into the connection holes 74 provided in the plate 68. The bearing 122 is made of a resin material that is a nonmagnetic material, and is made of, for example, polyplastics. It is to be noted that a magnetic material may be used, not necessarily a non-magnetic material.

The gear 140 includes a main plate 142, gear teeth 144 provided on the outer peripheral surface of the main plate 142, and an opening 146 through which the shaft 14 of the shaft 10 can be inserted. The main plate 142 is provided with two locking holes 148 for fitting the arc-shaped protrusions 120 provided on the joint 108 at positions corresponding to the arc-shaped protrusions 120. The gear 140 is made of a resin material that is a non-magnetic material,
For example, polyplastics or the like is used.

As the retaining ring 150, one having a size to be fitted in the ring-shaped groove 18 provided in the shaft 10 is selected. In the present embodiment, ISTW-10 (JIS
Standard) is used.

As shown in FIG. 1, the rotary input assembly 8 is inserted so that the gear 140 positioned by the joint 108 can slide on the shaft of the shaft 10. The rotor 100 is fitted over the joint 108.

In the electromagnetically controlled spring clutch mechanism having the above configuration, the contact area between the cylindrical portion 116 of the joint 108 and the opening 126 of the bearing 122 forms an input-side bearing. Also, the arc-shaped protrusion 5 protruding from the head portion 12 of the shaft 10 and the arc-shaped opening 46 of the field plate 36.
The contact area with the inner surface of 6 forms a bearing on the output side.

When a driving source (not shown) drivingly connected to the gear 140 is urged, the gear 140 rotates and the joint 108 connected to the gear 140 and
The rotor 100 rotates. On the other hand, when the electromagnetic coil 48 is deenergized, in the present embodiment, the rotary output assembly 2, the electromagnetic coil assembly 4, and the armature assembly 6 are stationary. Therefore, the square spring 84
When the electromagnetic coil 48 is deenergized, the stationary state is maintained.

(Operation of Electromagnetic Control Spring Clutch Mechanism) The operation principle of the electromagnetic control spring clutch mechanism having the above configuration is as follows.
When a drive source (not shown) to which the gear 140 of the rotation input assembly 8 is drivingly connected is energized, the rotation input assembly 8 including the gear 146 rotates clockwise as viewed from the right side.

When the electromagnetic coil 48 is deenergized,
The armature 76 of the amateur assembly 6 is separated from the rotor 100 of the rotary input assembly 8 and
The armature assembly 6 including the shaft 4 and the rotary output assembly 2 including the shaft 10 are kept stationary without rotating.

When the electromagnetic coil 48 is energized, the first hub group 20, the second hub 28, the field plate 36, the plate 68, the armature 76, the square spring 84, and the third hub constituted by magnetic members are formed. A magnetic field is generated that passes through a magnetic path (dotted line W in FIG. 1) formed by the group 92. As a result, the magnetic attraction generated between the rotor 100 of the rotary input assembly 8 and the armature 76 of the armature assembly 6 further deforms the shaft 86 of the angular spring 84 more elastically, and the armature 76 is The armature 76 is moved toward the rotor 100, and the armature 76 is attracted to the rotor 100.

When the armature 76 is attracted to the rotor 100, the armature 76 starts rotating with the rotation of the rotor 100. The square spring portion 90 of the square spring 84 is engaged with the amateur 76, and the square spring 84 also starts rotating.
, The rotation of the angular spring 84 is prevented. Thus, the shaft portion 86 of the square spring 84 contracts due to the rotational force applied from the square spring portion 90 of the square spring 84. As a result, the angular spring 84 is attached to the cylindrical shaft portion 102 provided on the rotor 100 of the rotation input assembly 8 and the third hub group 92.
The shaft portion 86 is wound tightly enough, and the cylindrical shaft portion 102 and the third hub group 92 are connected by the square spring 84.

As described above, by connecting the cylindrical shaft portion 102 and the third hub group 92 by the square spring 84,
The rotation input assembly 8 is connected to the rotation output assembly 2, and together with the rotation input assembly 8, the armature assembly 6 including the angular spring 84 and the shaft 10 integrally rotate clockwise as viewed from the right. Will do.

On the other hand, when the electromagnetic coil 48 is deenergized, the armature 84 returns to the original position by the elastic restoration of the angular spring 84 of the armature assembly 6, and the armature 76 is separated from the rotor 100 of the rotary input assembly 8. It will be in the state that was done.

(Operation / Effects) As described above, according to the electromagnetically controlled spring clutch mechanism of this embodiment, the joint 108 and the bearing 122 constituting the input side bearing are made of resin products, and the output side bearing is constructed. Since the shaft 10 and the annular side wall 56 are made of a resin product and a magnetic path is formed as shown by a dotted line W in FIG. 1, a magnetic path is not formed in the bearing portion as in the conventional structure. As a result, a periodic contact noise of the metal due to the rotation of the shaft does not occur, and the silentness of the electromagnetic control spring clutch mechanism can be improved.

By increasing the proportion of the resin product, the weight of the electromagnetic control spring clutch mechanism can be reduced. Further, since the shaft 10 is made of a resin product, generation of a thrust load due to magnetism is avoided, and it is possible to reduce the torque during rotation.

Conventionally, the shaft has generally been formed of an iron-based sintered alloy member. However, in the case of a sintered alloy member, the work of removing burrs and burrs is required due to generation of burrs and burrs, and thus high cost was required for manufacturing the shaft. However, since the shaft 10 is made of a resin product, the first hub group 20, the second hub 28, and the third hub group 92, which are provided to configure the magnetic path, can all be formed by press working. Therefore, the manufacturing cost of the electromagnetic control spring clutch mechanism can be reduced.

Further, in the rotor 100 of the rotary input assembly 8, the cylindrical shaft portion 102 and the annular plate 104 are integrally formed, thereby increasing the cost associated with the finishing work in the case where the conventional two-part structure is used. The problem is solved, and the manufacturing cost of the electromagnetic control spring clutch mechanism can be reduced.

Further, according to the electromagnetic control spring clutch mechanism of this embodiment, since the angular spring 84 is fixed to the rotary output assembly 2 side, when the electromagnetic coil 48 is deenergized, the angular spring Spring 84 does not rotate. as a result,
Without damaging the outer peripheral surface of the cylindrical shaft portion 102,
Malfunction can be prevented from occurring.

Further, the angular spring 84 is provided with three or more radially extending protruding regions that engage with the armature 76, so that the position control function of the armature 76 and the cylindrical shaft 102, the third hub group 92, Can be provided. As a result, the conventional leaf spring for the position control function of the armature is not required, and the electromagnetically controlled spring clutch mechanism can be reduced in size.

Since the armature 76, the rotor 100 and the suction operation are performed in a closed space between the plate 68 and the coil assembly 48, the adhesion of dust and the like from outside is restricted, and the electromagnetic control spring clutch mechanism is provided. Can improve the reliability of the operation.

The embodiments disclosed this time are illustrative in all aspects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0081]

According to the electromagnetically controlled spring clutch mechanism based on the present invention, the bearing region can be constituted by a member made of a non-magnetic material, and a magnetic path is formed in the bearing portion as in the conventional structure. No longer configured. As a result, a periodic contact noise of the metal due to the rotation of the shaft does not occur, and the silentness of the electromagnetic control spring clutch mechanism can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of an electromagnetic control spring clutch mechanism according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of an electromagnetic control spring clutch mechanism in the embodiment according to the present invention.

FIG. 3 is an exploded perspective view showing a configuration of an electromagnetic control spring clutch mechanism according to the related art.

[Explanation of symbols]

2 rotation output assembly, 4 electromagnetic coil assembly, 6 amateur assembly, 8 rotation input assembly, 10 shaft,
12 head part, 14 shaft part, 16 chamfer area, 18
Ring-shaped groove, 20 first hub group, 22 ring-shaped plate, 24 opening, 26 locking portion, 28 second hub, 3
0 opening, 32 locking part, 34 notch, 36 field plate, 38 main plate, 40, 42 auxiliary plate, 44 opening, 46 arcuate opening, 48 coil assembly, 50 cylindrical shaft, 52, 54 annular side wall , 5
6 arc-shaped protrusion, 58 coil wire, 60 bobbin cover, 6
2 cylindrical part, 64 notch, 68 plate, 70 main plate, 72 opening, 74 connecting hole, 76 amateur, 78 circular plate, 80 opening, 82 convex,
84 Square spring, 86 Shaft, 88 Locking projection, 90
Square spring part, 92 third hub group, 94 ring-shaped plate, 96 opening, 98 locking part, 100 rotor, 10
2 cylindrical shaft portion, 104 annular plate, 106 protrusion,
108 joint, 110 cylindrical shaft portion, 112 extended annular plate, 114 slit, 116 cylindrical portion, 12
0 arc-shaped protrusion, 122 bearing, 124 main plate, 1
26 openings, 128 recesses, 140 gears, 142 main plate, 144 gear teeth, 146 openings, 148
Locking hole, 150 retaining ring.

Claims (4)

[Claims] 1. An input-side rotating member, an output-side rotating member, an armature assembly for connecting the input-side rotating member and the output-side rotating member to a connected state or a non-connected state, and An electromagnetic control spring clutch mechanism comprising: an electromagnetic coil assembly for controlling a connected state and a non-connected state, wherein the input-side rotating member includes a first input rotating member made of a non-magnetic material; A second input rotating member made of a magnetic material fitted on the first input rotating member, wherein the output-side rotating member has a first output rotating member made of a non-magnetic material, and An electromagnetically controlled spring clutch machine having a second output rotating member made of a magnetic material to be fitted, wherein the second input rotating member and the second output rotating member constitute a part of a magnetic path. Structure. 2. The electromagnetically controlled spring clutch mechanism according to claim 1, wherein the second output rotating member includes a plurality of rings divided in a rotation axis direction. 3. The armature assembly according to claim 2, wherein the second input rotation member is provided on the armature assembly by controlling a connection state and a non-connection state of the shaft fitted on the first output rotation member and the electromagnetic coil assembly. 3. The electromagnetically controlled spring clutch mechanism according to claim 1, wherein an annular plate on which the armature is attracted is provided integrally. 4. The electromagnetically controlled spring clutch mechanism according to claim 1, wherein said input side rotation member and said output side rotation member are made of a resin member.