JP2007247756A - Pulley device with built-in one-way clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulley device with a built-in one-way clutch having stabilized clutch function and improved reliability by minimizing metal particles on the engaging face of the clutch to suppress the wear. <P>SOLUTION: The pulley device 10 with the built-in one-way clutch comprises a sleeve 11 to be freely fixed to the rotating shaft of an automobile accessory, a pulley 12 to be arranged around the sleeve 11 concentrically with the sleeve 11, the one-way clutch 13 arranged between the outer peripheral face of the sleeve 11 and the inner peripheral face of the pulley 12, and a pair of dust collecting magnets 25. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pulley device with a built-in one-way clutch, and in particular, applies power to an input shaft of an auxiliary device such as an alternator driven by power of an engine crankshaft, and conversely, engine crankshaft. The present invention relates to a pulley device with a built-in one-way clutch used for an output shaft of a starter motor.

  In general, a driven pulley is fixed to an end of a rotating shaft of an automobile auxiliary machine such as an alternator, and an endless belt is stretched between a driving pulley fixed to an end of an engine crankshaft. Is used to drive. In addition, the driven pulley allows the transmission of power from the endless belt to the rotating shaft when the running speed of the endless belt is constant or increases, and the driven pulley is driven when the running speed of the endless belt tends to decrease. A pulley apparatus incorporating a one-way clutch is known (see, for example, Patent Document 1) so that relative rotation between a pulley and a rotating shaft is free.

  For example, as shown in FIG. 13, a pulley device 100 with a built-in one-way clutch incorporated in an automobile accessory includes a pulley 101 over which a drive belt from a drive pulley fixed to an engine crankshaft is stretched, and an automobile accessory. A one-way clutch 103 and a pair of support bearings 104 are arranged between the pulley 101 and the sleeve 102.

  When the rotational angular velocity of the pulley 101 is higher than the rotational angular velocity of the rotating shaft of the automobile auxiliary machine, the pulley 101 and the sleeve 102 cannot be relatively rotated (locked) by the wedge action of the roller 105 of the one-way clutch 103. Thus, the rotational force of the engine is transmitted to the rotating shaft of the automobile accessory. On the other hand, when the rotational angular speed of the pulley 101 is slower than the rotational angular speed of the rotating shaft of the automobile accessory, such as a speed fluctuation or a minute angular speed fluctuation, the pulley 101 and the sleeve 102 can freely rotate (overrun state). Therefore, even when the rotational angular velocity of the crankshaft fluctuates, the endless belt and the pulley 101 are prevented from rubbing due to the action of the one-way clutch 103, and the endless belt is prevented from being shortened due to the generation of abnormal noise called wear and wear. In addition, it is possible to prevent the power transmission efficiency to the automobile auxiliary machine from being lowered.

Further, in the one-way clutch 200 described in Patent Document 1, as shown in FIG. 14, a roller 203 disposed between the outer ring 201 and the inner ring 202 is attached by a magnet 205 provided on a column portion 204 a of the cage 204. It is energized.
JP 11-287261 A (FIG. 1)

  By the way, in the pulley device with a built-in one-way clutch described above, scraps during machining, metal particles floating in the assembly atmosphere, adhesive wear during initial operation such as during running-in operation, and corrosion wear during operation. There is a possibility that metal particles due to the above may intervene in the clutch engagement surface. When many of these metal particles are present on the clutch engaging surface, the metal particles act as an abrasive and may cause excessive wear.

  Therefore, in the conventional pulley device with a built-in one-way clutch, the metal particles on the clutch engagement surface are reduced as much as possible to suppress wear, thereby maintaining the engagement angle of the one-way clutch and stabilizing the clutch function. There is a further need to make it happen. Further, in the one-way clutch 200 described in Patent Document 1, it is disclosed that the roller 203 is urged by using a magnet 205, but dust collection is not taken into consideration, and metal particles attached to the magnet 205 are disclosed. May wear the rollers 203 facing each other.

  The present invention has been made in view of the circumstances as described above, and an object of the present invention is to stabilize the clutch function by reducing the metal particles on the clutch engagement surface as much as possible to suppress wear, and to improve reliability. An object of the present invention is to provide a pulley device with a built-in one-way clutch that can improve performance.

The above object of the present invention can be achieved by the following constitution.
(1) A sleeve that can be fixed to the rotating shaft of an automobile accessory;
A pulley arranged concentrically with the sleeve around the sleeve;
A one-way clutch disposed between the outer peripheral surface of the sleeve and the inner peripheral surface of the pulley;
A one-way clutch built-in pulley device comprising:
A pulley apparatus with a built-in one-way clutch, further comprising a magnet for collecting dust.
(2) The one-way clutch built-in pulley apparatus according to (1), wherein the magnetic attraction force of the magnet is 5.0 × 10 ⁻³ (N) or less on the surface of the one-way clutch engagement element. .
(3) The pulley device with a built-in one-way clutch according to (1) or (2), wherein the magnet is incorporated in an annular portion of a clutch cage of the one-way clutch.
(4) further comprising a support bearing disposed adjacent to the one-way clutch between the outer peripheral surface of the sleeve and the inner peripheral surface of the pulley;
The one-way clutch built-in pulley apparatus according to any one of (1) to (3), wherein the magnet is sandwiched between the one-way clutch and the support bearing.
(5) The pulley apparatus with a built-in one-way clutch according to any one of (1) to (4), wherein the magnet is built in a clutch outer ring of the one-way clutch.
(6) The one-way clutch built-in pulley apparatus according to any one of (1) to (5), wherein the magnet is magnet powder contained in a clutch cage of the one-way clutch.
(7) The pulley apparatus with a built-in one-way clutch according to any one of (1) to (5), wherein the magnet is magnet powder adhered to a surface of a clutch cage of the one-way clutch.
(8) The pulley apparatus with a built-in one-way clutch according to any one of (1) to (7), wherein the magnet is magnet powder bonded to the surface of the elastic member of the one-way clutch.
(9) The one-way clutch built-in pulley according to any one of (1) to (7), wherein the magnet is an elastic member of a one-way clutch magnetized with a ferromagnetic material to be a permanent magnet. apparatus.
(10) The magnet is an elastic member of the one-way clutch in which a ferromagnetic material is magnetized by heat treatment to obtain a permanent magnet having a maximum energy product (BH) max of 2.00 [kJ / m ³ ] or more. The one-way clutch built-in pulley apparatus according to any one of (1) to (7), characterized in that:

  According to the one-way clutch built-in type pulley apparatus of the present invention, since the dust collecting magnet is provided, the clutch function is stabilized by reducing the metal particles on the clutch engaging surface as much as possible to suppress wear. Reliability can be improved.

  Hereinafter, a pulley apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a longitudinal sectional view for explaining a pulley apparatus with a built-in one-way clutch for automobile auxiliary equipment according to a first embodiment. As shown in FIG. 1, a pulley apparatus 10 with a built-in one-way clutch according to this embodiment is for driving an automobile auxiliary machine such as an alternator, and a sleeve 11 into which a rotary shaft (not shown) is fitted. Have Around the sleeve 11, a pulley 12 having a belt groove 12 a formed on the outer peripheral surface is disposed concentrically with the sleeve 11. In addition, a one-way clutch 13 is disposed between the outer peripheral surface of the sleeve 11 and the inner peripheral surface of the pulley 12 in the intermediate portion in the axial direction of the annular space formed therebetween. A pair of support bearings 14, which are ball bearings such as deep groove ball bearings, are disposed adjacent to the one-way clutch 13 at both ends, that is, both axial sides of the one-way clutch 13. In addition, the shape of the belt groove 12a can be designed in an arbitrary shape such as a V groove, a poly V groove, or a tooth groove.

  The one-way clutch 13 transmits the rotational force from the pulley 12 to the sleeve 11 only when the pulley 12 tends to rotate relative to the sleeve 11 in a predetermined direction. Further, the pair of support bearings 14 enables the relative rotation between the sleeve 11 and the pulley 12 while supporting a radial load applied to the pulley 12.

  Each support bearing 14 includes an inner ring 15 fitted on the outer circumferential surface of the sleeve 11, an outer ring 16 fitted on the inner circumferential surface of the pulley 12, and a roller disposed between both raceway surfaces of the inner ring 15 and the outer ring 16. It has a plurality of balls 17 that are moving bodies, a cage 18 that holds the balls 17 in a freely rolling manner, and a seal member 19 that prevents the intrusion of foreign matter from the outside and the leakage of a lubricant such as grease from the inside. Yes.

  The one-way clutch 13 includes a clutch outer ring 20 that is press-fitted and fixed to the inner peripheral surface of the pulley 12, a clutch inner ring 21 that is press-fitted and fixed to the outer peripheral surface of the large-diameter portion of the sleeve 11, and the clutch outer ring 20 and the clutch inner ring 21. And a plurality of rollers 22 which are engaging members disposed between the rollers. The outer peripheral surface of the clutch inner ring 21 forms a cam surface in which a plurality of concave ramp surfaces 21a, which are clutch engaging surfaces to which the rollers 22 are brought into rolling contact, are provided at predetermined intervals in the circumferential direction. The rollers 22 are rotatably held in a wedge space composed of each ramp surface 21a and a cylindrical surface 20a that is a clutch engagement surface formed on the inner peripheral surface of the clutch outer ring 20.

  The one-way clutch 13 includes a clutch retainer 23 having a plurality of pockets that individually accommodate the rollers 22 and a spring 24 that is an elastic member that elastically presses the rollers 22 in the locking direction. .

  Further, the one-way clutch 13 is incorporated into the outer peripheral surface of the pair of annular portions 23a of the clutch retainer 23, sucks the metal particles adhering to the clutch engagement surface, and draws the metal particles on the clutch engagement surface. It has a pair of dust collecting magnets 25 for removal. As shown in FIG. 2, the magnet 25 has an inclined surface 25 a along the outer peripheral surface of the pair of annular portions 23 a on one end surface in the axial direction, and is formed in a ring shape. It is fitted from the outside in the axial direction.

The magnetic attraction force of the magnet 25 is set to be 5.0 × 10 ⁻³ (N) or less on the rolling surface which is the clutch engagement surface of the roller 22 of the one-way clutch. Since the metal particles are very fine, the magnet 25 can collect dust even if the magnetic attractive force is very small. On the other hand, the magnetic attractive force is set so that the roller 22 is attracted depending on the shape and state of the roller 22 and the clutch operation is not hindered.

  In the pulley device 10 with a built-in one-way clutch configured as described above, the roller 22 of the one-way clutch 13 has a wedge action when the rotational angular velocity of the pulley 12 is faster than the rotational angular velocity of the rotating shaft of an automobile accessory, for example. As a result, the pulley 12 and the sleeve 11 cannot be rotated relative to each other (locked state), and the rotational force of the engine is reduced by that of the automobile auxiliary machine. It is transmitted to the rotating shaft. On the other hand, when the rotational angular velocity of the pulley 12 is slower than the rotational angular velocity of the automobile accessory, the roller 22 is released and the pulley 12 and the sleeve 11 are allowed to rotate relative to each other (overrun state).

  Therefore, according to the pulley apparatus 10 with a built-in one-way clutch according to the present embodiment, the pair of dust collecting magnets 25 are provided, so that the ramp surface 21a, the cylindrical surface 20a, and the rollers 22 as the clutch engaging surface roll. By reducing the number of metal particles on the surfaces as much as possible to keep these surfaces clean and suppressing abrasive wear, the clutch function can be stabilized and the reliability can be improved.

  In the present embodiment, the pair of dust collecting magnets 25 is disposed on both the pair of annular portions 23, but the magnet 25 may be disposed on only one of the pair of annular portions 23.

(Second Embodiment)
Next, a pulley device with a built-in one-way clutch according to a second embodiment of the present invention will be described in detail with reference to FIGS. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

  In the pulley device 30 with a built-in one-way clutch according to the present embodiment, the one-way clutch 13 is used for collecting a plurality of dusts that are incorporated at predetermined intervals in the circumferential direction on the outer peripheral surfaces of the pair of annular portions 23a of the cage 23. The magnet 31 is provided. In the annular portion 23a of the cage 23, a plurality of recesses 23b for accommodating the magnets 31 are formed so as to open outward in the radial direction and outward in the axial direction, and the recesses 23b are formed as shown in FIG. As shown, the trapezoidal shape with a long inner diameter side prevents the magnet 31 from falling off due to centrifugal force. In addition, the shape of the recessed part 23b is not limited to the said trapezoid shape, You may make it prevent dropping by the centrifugal force by providing a protrusion.

  Therefore, the pulley device 30 with a built-in one-way clutch of the present embodiment also has a plurality of dust collecting magnets 31, so that the ramp surface 21 a as the clutch engagement surface, the cylindrical surface 20 a, and the rolling surfaces of the rollers 22 are provided. By reducing the upper metal particles as much as possible to keep these surfaces clean and suppressing abrasive wear, the clutch function can be stabilized and the reliability can be improved.

(Third embodiment)
Next, a pulley apparatus with a built-in one-way clutch according to a third embodiment of the present invention will be described in detail with reference to FIGS. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

  In the pulley device 40 with a built-in one-way clutch according to the present embodiment, the clutch outer ring 20 ′ of the one-way clutch 13 has the axial one end portion 20b extending in the axial direction and the flange is omitted. A dust collecting magnet 41 is sandwiched between the outer ring 16 of the support bearing 14. As shown in FIG. 6, the dust collecting magnet 41 has a rectangular cross section and is formed in a ring shape.

In the pulley device 40 with a built-in one-way clutch configured as described above, since the axial one end portion 20b of the clutch outer ring 20 'has no flange, grease that is blown off by centrifugal force easily comes into direct contact with the magnet 41 and collects dust. Cheap. Further, on the side of the one end 20b in the axial direction of the clutch outer ring 20 ′, the magnet 41 has a grease outflow prevention function like the flange, and the configuration of the clutch outer ring 20 ′ can be simplified.
Other configurations and operations are the same as those in the first embodiment.

  In the present embodiment, the magnet 41 is disposed only on one end side in the axial direction of the clutch outer ring 20 ′. However, the magnet 41 is disposed on both end sides in the axial direction and also on the other end side in the axial direction of the clutch outer ring 20 ′. It is good also as a structure which abbreviate | omitted the flange. Thereby, the structure of clutch outer ring | wheel 20 'can be simplified more. Further, the magnet 41 may be configured to be disposed between the one-way clutch 13 and the support bearing 14 and may be sandwiched between the clutch inner ring 21 and the inner ring 15 of the support bearing 14.

(Fourth embodiment)
Next, a pulley device with a built-in one-way clutch according to a fourth embodiment of the present invention will be described in detail with reference to FIGS. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

  In the pulley device 50 with a built-in one-way clutch according to the present embodiment, the clutch outer ring 20 of the one-way clutch 13 has a pair of radially inward flange portions 20c at both axial end portions, and one flange portion 20c. A magnet 51 for collecting dust is attached to the inner end surface in the axial direction. As shown in FIG. 8, the magnet 51 for collecting dust has a substantially rectangular cross section and is formed in a ring shape.

In the pulley device 50 with a built-in one-way clutch configured as described above, since the magnet 51 is built in the clutch outer ring 20, the grease and the magnet 51 are in contact with each other in the clutch outer ring 20 having the flange portions 20c at both ends in the axial direction. Easy to collect and easy to collect dust.
Other configurations and operations are the same as those of the first embodiment. The magnet 51 may be attached to both the pair of flange portions 20c of the clutch outer ring 20.

(Fifth embodiment)
Next, a pulley device with a built-in one-way clutch according to a fifth embodiment of the present invention will be described in detail with reference to FIG. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

  In the pulley apparatus with a built-in one-way clutch according to the present embodiment, the clutch cage 60 of the one-way clutch 13 contains magnetic powder and constitutes a dust collecting magnet. That is, the clutch cage 60 is a so-called bond magnet, which is a composite magnet in which magnetic powder is wrapped with a matrix polymer.

  For example, an alnico magnet, a ferrite magnet, or a rare earth magnet is used as the hard magnet powder, and various thermosetting resins or plastic resins are used as the matrix polymer. In addition to the glass fiber reinforced polyamide resin that is the material of the current cage, rubber magnets of vinyl chloride, chlorinated polyethylene, and nitrile rubber, and plastic magnets of polyamide resin, PPS resin, and epoxy resin can be applied. As methods for forming these magnets, a wide range of methods such as a calendar (rolling) method, extrusion, injection, and compression can be used.

In the pulley device with a built-in one-way clutch configured as described above, since the dust collecting magnet is configured by the clutch cage 60 containing magnet powder, an increase in the number of parts can be suppressed, and the clutch cage 60 Since the entire surface can be an adsorption surface, a wide adsorption area can be secured.
Other configurations and operations are the same as those of the first embodiment. In addition, it is preferable that the clutch retainer 60 is configured so that the roller 22 does not contact the circumferential end surface of the column portion.

(Sixth embodiment)
Next, a pulley apparatus with a built-in one-way clutch according to a sixth embodiment of the present invention will be described in detail with reference to FIG. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

  In the one-way clutch built-in pulley apparatus of the present embodiment, the magnetic powder bonding portion 70 that is a magnet for dust collection is configured by magnet powder that is bonded to the surface of the clutch cage 20 of the one-way clutch 13. Specifically, the magnetic powder adhesion part 70 is formed in an arbitrary part other than the part in contact with the movable part of the spring 24 of the clutch retainer 20 and the part in contact with the roller 22 by the movement of the roller 22. It is formed on a part of the outer peripheral surface of the annular portion 23a and the column portion 23b, the outer peripheral surface of the spring support portions 23c and 23d, and the like.

In the pulley device with a built-in one-way clutch configured as described above, the magnetic powder bonding portion 70 is configured by the magnet powder bonded to the surface of the clutch cage 23, so that it is limited to an effective place of the clutch cage 20. Thus, the magnetic particle bonding portion 70 can be configured except for portions that are not desired to be adsorbed.
Other configurations and operations are the same as those of the first embodiment.

(Seventh embodiment)
Next, a pulley apparatus with a built-in one-way clutch according to a seventh embodiment of the present invention will be described in detail with reference to FIG. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

  In the pulley device with a built-in one-way clutch according to the present embodiment, the magnetic powder bonding portion 80 that is a magnet for collecting dust is constituted by magnet powder bonded to the surface of the spring 24 of the one-way clutch 13. Specifically, the magnetic powder bonding portion 80 is formed on the front and back surfaces of the base portion 24a of the spring 24 that does not come into contact with the spring support portions 23c and 23d of the clutch retainer 23.

In the pulley device with a built-in one-way clutch configured as described above, the magnetic powder bonding portion 80 is configured by the magnet powder bonded to the surface of the spring 24 of the one-way clutch 13, and therefore the clutch between the roller 22 and the clutch inner ring 21. The dust can be collected by the spring 24 close to the engagement surface, and the metal particles trying to enter the clutch engagement surface can be more reliably adsorbed.
Other configurations and operations are the same as those in the first embodiment.

(Eighth embodiment)
Next, a pulley apparatus with a built-in one-way clutch according to an eighth embodiment of the present invention will be described in detail with reference to FIG. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

  In the pulley device with a built-in one-way clutch according to the present embodiment, the spring 24 of the one-way clutch 13 magnetizes a ferromagnetic material to form a permanent magnet, thereby forming a dust collecting magnet. As shown in FIG. 12A, in the ferromagnetic piece 90 in the room temperature state, the electron spins 91b in the magnetic domains 91a of the atomic magnets 91 are uneven and the spontaneous magnetism is small. In addition, as shown in FIG. 12B, in the ferromagnetic piece 90 of absolute zero degree, the electron spins 91b in the magnetic domains 91a of each atomic magnet 91 are aligned, and the spontaneous magnetism is maximized, but the atomic magnet 91 Since the directions of the electron spins 91b are different from each other, no magnetic pole is generated in the hatched portion 92 in the figure. On the other hand, as shown in FIG. 12 (c), by performing the magnetization process (the magnetic spin on the electron spin 91b in the magnetic domain 91a), the ferromagnetic piece 90 has the direction of the electron spin 91b between the atomic magnets 91. Become the same, and a magnetic pole is generated to become a permanent magnet.

Therefore, by applying a magnetizing process to the spring material, the spring 24 itself can adsorb metal particles, and as in the seventh embodiment, dust can be collected by the spring 24 close to the clutch engagement surface, and the clutch engagement It is possible to more reliably adsorb metal particles that try to enter the mating surface.
It is to be noted that the orientation structure is obtained by heating, using a laser or other optical technique in a magnetic field, and melting / semi-melting or annealing so that metal particles do not adhere to the contact portion of the spring 24 with the roller 22. Are placed in the desired shape.
Other configurations and operations are the same as those in the first embodiment.

(Ninth embodiment)
Next, a pulley device with a built-in one-way clutch according to a ninth embodiment of the present invention will be described in detail. Since this embodiment is different from the first embodiment only in the arrangement of the magnets for collecting dust, the other components are denoted by the same reference numerals and description thereof is omitted or simplified.

In the pulley device with a built-in one-way clutch according to the present embodiment, a magnet for dust collection is formed by using a hardened permanent magnet material for the spring 24 of the one-way clutch 13. When a high carbon steel is heated to a high temperature and rapidly cooled from an austenite structure, the material becomes a martensite structure and exhibits the properties of a weak permanent magnet. In addition, the maximum energy product is used on the basis of the magnetic attractive force of the permanent magnet, but the kinetic energy of the metal particles under the fluctuation of rotation is about 2.00 [kJ / m ³ ]. Requires suction.

Accordingly, the ferromagnetic material is magnetized by heat treatment, and the dust is collected by the spring 24 which is a permanent magnet having a maximum energy product (BH) max of 2.00 [kJ / m ³ ] or more, so that the seventh embodiment is performed. Similarly to the form, the metal particles that try to enter the clutch engagement surface can be more reliably adsorbed.
Also in this embodiment, heating, semi-melting, or annealing is performed by using an optical technique such as laser in a magnetic field so that metal particles do not adhere to the contact portion of the spring 24 with the roller 22. By doing so, the oriented structure is arranged in a target shape.
Other configurations and operations are the same as those in the first embodiment.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
The shape of the magnet for dust collection of the present invention is not limited to that of the present embodiment, and any shape can be applied.
In addition, the dust collection magnets of the above-described embodiment can be applied in combination within a practicable range in consideration of the magnetic attractive force on the surface of the engagement element.

  The one-way clutch of the present invention only needs to transmit a rotational force between the sleeve and the pulley, and the pulley tends to rotate relative to the sleeve in a predetermined direction as in the present embodiment. The clutch inner ring may be a cylindrical surface, and the clutch outer ring may be a cam surface having a plurality of ramp surfaces, and the sleeve may be fixed to the pulley. A one-way clutch that transmits rotational force may be used only when it tends to rotate relative to the direction.

  The one-way clutch of the present invention may be a roller clutch as in this embodiment, or may be a cam clutch or a sprag clutch. The clutch outer ring or clutch inner ring of the one-way clutch may be separate from the pulley or sleeve as in this embodiment, and is integrated with the pulley or sleeve, that is, depending on the inner peripheral surface of the pulley or the outer peripheral surface of the sleeve. It may be configured.

  Further, the pair of support bearings of the present invention may be of a type other than the deep groove ball bearing, or may be a combination of a roller bearing or a ball bearing. Further, the inner ring or the outer ring of the support bearing may be integrated with the pulley or the sleeve, that is, the inner peripheral surface of the pulley or the outer peripheral surface of the sleeve.

It is sectional drawing of the pulley apparatus with a built-in one-way clutch which concerns on 1st Embodiment of this invention. (A) is sectional drawing of the magnet for dust collection of FIG. 1, (b) is the side view. It is sectional drawing of the pulley apparatus with a built-in one-way clutch which concerns on 2nd Embodiment of this invention. (A) is the figure which removed the clutch outer ring | wheel, and was seen from the upper direction of the one-way clutch of FIG. 1, (b) is a side view of a clutch holder and a magnet for dust collection. It is sectional drawing of the pulley apparatus with a built-in one-way clutch which concerns on 3rd Embodiment of this invention. (A) is sectional drawing of the magnet for dust collection of FIG. 5, (b) is the side view. It is sectional drawing of the pulley apparatus with a built-in one-way clutch which concerns on 4th Embodiment of this invention. (A) is sectional drawing of the magnet for dust collection of FIG. 7, (b) is the side view. (A) is the figure which looked at the one-way clutch which concerns on 5th Embodiment of this invention from the upper direction which removed the clutch outer ring | wheel, (b) is sectional drawing of the one-way clutch of (a). (A) is the figure which looked at the one-way clutch which concerns on 6th Embodiment of this invention from the upper direction which removed the clutch outer ring | wheel, (b) is sectional drawing of the one-way clutch of (a). (A) is a top view of the spring of the one-way clutch which concerns on 7th Embodiment of this invention, (b) is a figure showing the surface of the base of a spring, (c) is the back surface of the base of a spring. FIG. It is a model figure of a ferromagnetic material. It is sectional drawing of the conventional one-way clutch built-in type pulley apparatus. It is sectional drawing of the other conventional one-way clutch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 One-way clutch built-in type pulley apparatus 11 Sleeve 12 Pulley 12a Pulley groove 13 One-way clutch 14 Support bearing 20 Clutch outer ring 21 Clutch inner ring 22 Roller (engagement element)
23 Clutch retainer 24 Spring (elastic member)
25, 31, 41, 51 Dust collection magnet 60 Clutch retainer (dust collection magnet)
70,80 Magnetic powder adhesion part (magnet for dust collection)

Claims (10)

A sleeve that can be fixed to the rotating shaft of an automobile accessory,
A pulley disposed around the sleeve and concentrically with the sleeve;
A one-way clutch disposed between an outer peripheral surface of the sleeve and an inner peripheral surface of the pulley;
A one-way clutch built-in pulley device comprising:
A pulley apparatus with a built-in one-way clutch, further comprising a magnet for dust collection. 2. The one-way clutch built-in pulley apparatus according to claim 1, wherein a magnetic attraction force of the magnet is 5.0 × 10 ⁻³ (N) or less on a surface of an engagement element of the one-way clutch.   The one-way clutch built-in pulley apparatus according to claim 1 or 2, wherein the magnet is incorporated in an annular portion of a clutch cage of the one-way clutch. A support bearing disposed adjacent to the one-way clutch between the outer peripheral surface of the sleeve and the inner peripheral surface of the pulley;
The one-way clutch built-in pulley apparatus according to any one of claims 1 to 3, wherein the magnet is sandwiched between the one-way clutch and the support bearing.   The one-way clutch built-in pulley apparatus according to claim 1, wherein the magnet is built in a clutch outer ring of the one-way clutch.   The one-way clutch built-in pulley apparatus according to any one of claims 1 to 5, wherein the magnet is magnet powder contained in a clutch cage of the one-way clutch.   The one-way clutch built-in pulley apparatus according to any one of claims 1 to 5, wherein the magnet is magnet powder adhered to a surface of a clutch cage of the one-way clutch.   The one-way clutch built-in pulley apparatus according to any one of claims 1 to 7, wherein the magnet is magnet powder bonded to a surface of an elastic member of the one-way clutch.   The one-way clutch built-in type pulley apparatus according to any one of claims 1 to 7, wherein the magnet is an elastic member of the one-way clutch which is made of a ferromagnetic material and is a permanent magnet. The magnet is the one-way clutch which is a permanent magnet having a maximum energy product (BH) max of 2.00 [kJ / m ³ ] or more by magnetizing a ferromagnetic material by heat treatment. Item 8. A one-way clutch built-in pulley apparatus according to any one of Items 1 to 7.

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