JPH10169673A - One-way clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain spring urging force and turn lock a clutch outer to a rotary unit. SOLUTION: In a one-way clutch fitting a clutch inner 31 rotatably to a clutch inner mounting hole 35 of a main unit of a clutch outer 33, rollably storing a clutch roller 43 in a plurality of clutch chambers 40 sunk in a wedge shape in an internal peripheral surface of the clutch inner mounting hole, inserting these clutch rollers 43 to a through hole 48 in a spring 50, to be urged with reaction taken to a stopper 49 by the spring 50, each pin insert hole 52 is opened orthogonal to each through hole 48, to each pin insert hole 52, each retraction lock pin 53 is inserted so as to receive a rear end of each stopper 49, each retraction lock pin 53 is fitted to each positioning hole 38 opened to a yoke 22 of a rotor 21. In this way, since the loosened stopper is locked by the retraction lock pin, a spring reaction end is prevented from being position displaced. The clutch outer is turn locked to the rotor by the retraction lock pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way clutch, and more particularly to an improvement in the structure of a clutch outer of a one-way clutch, for example, for connecting a starter motor with a magnet generator linked to an engine of a motorcycle or the like. It relates to a one-way clutch that is effective to use for performing release.

[0002]

2. Description of the Related Art Generally, in an engine such as a two-wheeled motor vehicle, which is configured to be started by a starter motor, it is necessary to separate the starter motor from the engine after the start. A one-way clutch is interposed between the two. On the other hand, in many cases, a magnet generator is directly connected to a crankshaft of an engine of a motorcycle or the like. Therefore, a structure in which a one-way clutch for connecting and disconnecting a starter motor and an engine is incorporated in a magnet generator has been widely adopted.

[0003] In a structure in which a one-way clutch is incorporated in a magnet generator directly connected to a crankshaft of an engine, a clutch outer is fixed concentrically to a boss member of a rotor of the magnet generator, and a clutch inner is fitted to the clutch outer. There is a structure in which a sprocket associated with a starter motor is fixed.

A conventional one-way clutch of this type includes a clutch inner and a clutch outer arranged concentrically inside and outside, and the clutch outer has a clutch inner mounting hole in which the clutch inner is fitted. A main body, a plurality of clutch chambers which are arranged at intervals in the circumferential direction on an inner peripheral surface of the clutch inner mounting hole, and are radially outwardly disposed in a wedge shape, and are capable of rolling into the respective clutch chambers. A plurality of stored clutch rollers and a plurality of springs for urging each of the clutch rollers toward the small diameter side of each of the clutch chambers are provided. A through hole for accommodating the spring is formed on the large diameter side of the clutch chamber so as to penetrate the clutch chamber from the outer periphery of the main body.
When the stopper is pressed into the outer end of the through hole that houses the spring, the reaction force of the spring is received by the stopper.

[0005] A document describing this type of one-way clutch is disclosed in Japanese Utility Model Laid-Open No. 62-177929.
There is an official gazette.

[0006]

In the conventional clutch outer described above, when the press-fit of the stopper press-fitted into the through hole is loosened, the biasing force of the spring on the clutch roller is different from the designed value or is not transmitted. In addition to the stopper, a knock pin is required to prevent the clutch outer from rotating around the rotor.

An object of the present invention is to provide a one-way clutch which can maintain the biasing force of a spring properly and can reliably prevent the clutch outer and the rotating body from rotating.

[0008]

A one-way clutch according to the present invention includes a clutch inner and a clutch outer disposed concentrically inside and outside, and the clutch outer is a clutch inner mounting to which the clutch inner is fitted. A main body having a hole, a plurality of clutch chambers which are arranged at intervals in a circumferential direction on an inner peripheral surface of the clutch inner mounting hole, and are radially outwardly disposed in a wedge shape; A plurality of clutch rollers housed so as to be able to roll, each through-hole penetrated through the large-diameter portion of each clutch chamber to the outer periphery of the main body in a tangential direction of the clutch inner mounting hole, and fitted into the through-hole. And each spring inserted in each of the through holes to take a reaction force on each of the stoppers to urge each of the clutch rollers toward the small diameter side of each of the clutch chambers. In the one-way clutch, a plurality of pin insertion holes are formed in the main body so as to intersect each of the through holes, and each detent pin is provided in each of the pin insertion holes on the opposite side of each of the stoppers from each of the springs. An end is inserted so as to receive the end, and at least one end of the respective detent pins is engaged with a part of a rotating body to which the clutch outer is attached.

According to the above-described means, since the stopper is received by the detent pin perpendicular to the through-hole, the stopper pressed into the through-hole is not allowed to retreat even if it is loosened. Absent. That is, even if the press-fit of the stopper is loosened, the position of the reaction force end of the spring does not shift, so that the spring can always maintain the predetermined elastic force, and urges the clutch roller with the predetermined elastic force. can do. As a result, the strictness of management of the dimensional accuracy of the through hole into which the stopper is inserted can be reduced.

[0010] In addition, since the rotation of the clutch outer and the rotating body can be prevented from rotating by at least one of the retraction stopping pins for preventing the stopper from retreating, the clutch outer and the rotating body can be surely integrally rotated. And the detent structure can be simplified.

[0011]

1 shows a one-way clutch according to an embodiment of the present invention. FIG. 1 (a) is a partially cut-away side view, and FIG. 1 (b) is a cross section taken along the line bb in FIG. 1 (a). FIG.
2A and 2B show a main part, FIG. 2A is a partially cut-away enlarged side view, and FIG. 2B is a cross-sectional view taken along line bb of FIG. FIG. 3 is an exploded perspective view. FIG. 4 is a front sectional view showing a magnet generator and a starter motor using the one-way clutch.

In the present embodiment, the one-way clutch according to the present invention is configured as a one-way clutch for linking a starter motor with a magnet generator directly connected to an engine of a two-wheeled vehicle. That is, the one-way clutch 30 includes a clutch inner 31 and a clutch outer 33 disposed concentrically inside and outside, and the clutch inner 31 is linked to the starter motor side, and the clutch outer 33 side is directly connected to the magnet generator side. I have.

As shown in FIG.
Crankshaft 12 protruding outside from side wall 11
The rotor 21 of the magnet generator 20 is directly connected to the protruding end portion, and the clutch inner 31 of the one-way clutch 30 is rotatably supported via a rolling bearing 32 at an intermediate portion of the crankshaft 12. .

The rotor 21 of the magnet generator 20 has a yoke 22 formed in a short cylindrical shape having a bottom wall.
A magnet 2 forming a field pole is provided on the inner peripheral surface of the yoke 22.
3 are fixed at intervals in the circumferential direction.
A boss member 24 is concentrically arranged and fixed to the bottom wall of the yoke 22.
And a key connection, and then fastened by a screw connection. Electron emission 25
Are generated, and the power generation 25 is connected to the side wall 1 of the engine 10.
1 is supported by an engine cover 13 fixed to the cover 1.
A closed chamber 14 is formed inside the engine cover 13.

The output shaft 16 of the starter motor 15 is inserted into the closed chamber 14. A drive sprocket 17 is fixed to the output shaft 16, and the driven sprocket 1 is fixed to the clutch inner 31.
It is linked to 8 by a chain 19.

The clutch outer 33 of the one-way clutch 30 has a main body 34 integrally formed into a cylindrical shape by cold forging, and a hollow cylindrical portion of the main body 34 forms a clutch inner mounting hole 35. A clutch inner 31 rotatably supported by the crankshaft 12 is rotatably fitted into the clutch inner mounting hole 35. 1 and 2, the clutch inner 31 is indicated by an imaginary line.

At the yoke-side end of the clutch inner mounting hole 35 of the main body 34, a female intaglio portion 36 formed concentrically and formed in a circular hole shape having a fixed depth is integrally buried. The seal portion 36 is joined to a male seal portion 37 formed on the outer periphery of the outer end of the yoke bottom wall of the boss member 24. The alignment between the clutch outer 33 and the rotor 21 is ensured by this intaglio connection. Rotor 21
Positioning in the circumferential direction between the clutch outer 33 and the clutch outer 33 is ensured by fitting a later-described detent pin into a positioning hole 38 formed in the bottom wall of the yoke 22. The main body 34 is engaged with the boss member 24 of the rotor 21 of the magnet generator 20 to secure the circumferential positioning, and then the yoke 2
The second bottom wall is fastened by a plurality of bolts 39.

Three wedge-shaped clutch chambers 40 are arranged at equal intervals in the circumferential direction and are sunk outward in the radial direction at a portion adjacent to the female seal portion 36 on the inner peripheral surface of the clutch inner mounting hole 35. In each clutch chamber 40, a clutch roller 43 is rotatably housed. In the clutch chamber 40, a small-diameter portion 41 and a large-diameter portion 42 having different distances from the center of the clutch inner mounting hole 35 are integrally formed in a wedge shape, and the clutch roller 43 is located in the small-diameter portion 41. , A wedge effect is exerted with the clutch inner 31.

An end face of each clutch chamber 40 on the side opposite to the female cage section 36 is closed by each closing wall section 44, and each closing wall section 44 is integrally formed with each clutch chamber 40 by cold forging of the main body 34. Molded. Female seal 3 of body 34
6, a roller plate 45 is housed in a state sandwiched between the roller plate 45 and the end surface of the boss member 24. The roller plate 45 is formed integrally using a thin plate, and is formed in a fan shape substantially equal to each clutch chamber 40 on an outer periphery of a ring-shaped portion 46 formed in a circular ring shape substantially equal to the female seal portion 36. The three holding pieces 47 are configured to protrude radially. The roller plate 45 is the clutch outer 33
The holding pieces 47 are in a state of closing the yoke side opening of each clutch chamber 40 in a state of being sandwiched between the boss member 24 and the boss member 24, and the clutch rollers 43 are moved in the yoke side direction by the holding pieces 47. Movement is regulated.

A through-hole 48 is formed in a portion of the main body 34 adjacent to the large-diameter portion 42 of the clutch chamber 40.
It is set up to penetrate 2. The through hole 48 is formed in a two-stage circular hole shape in which the end on the clutch chamber 40 side is slightly smaller in diameter than the end on the outer peripheral side.
The inner diameter of 8a is set substantially equal to the outer diameter of a spring cap described later. Each of the stoppers 49 formed in a columnar shape is press-fitted into an end of the small-diameter portion 48a of each through hole 48 on the large-diameter portion 48b side. A knurled portion 49a is formed at an intermediate portion of each stopper 49 so as to prevent press-fitting from being loosened.

A spring 50 is inserted into the through-hole 48 from the clutch chamber 40, and an insertion end of the spring 50 that is a reaction end is received by a stopper 49 pressed into the through-hole 48. The biasing end of the spring 50 is covered with a spring cap 51 formed in a cylindrical shape with a bottom. The spring 50 is connected to the clutch roller 4 via the closed end wall of the spring cap 51.
3 is always in a pressed state. The spring 50 is provided with a stopper 49 press-fitted into the through hole 48,
, The elastic force is constantly urged against the clutch roller 43 from the large-diameter portion 42 side of the clutch chamber 40 toward the small-diameter portion 41 side.

Each of the through holes 48 has a large diameter portion 48b formed with a pin insertion hole 52 perpendicular to the through hole 48. Each of the pin insertion holes 52 has a columnar detent pin 53. Are each press-fitted. Pin insertion hole 5
In a state in which the stopper pin 53 is press-fitted into the through hole 2, the stopper pin 53 is in a state of circumscribing the outer end surface of the stopper 49 press-fitted in the through hole 48. That is, the stopper 49 is prevented from retreating even if the press-fitting is loosened by the retraction stopping pin 53. Each detent pin 53
A knurled portion 53a is formed at an intermediate portion of the member so as to prevent press-fitting from being loosened. The tip of each of the detent pins 53 is fitted into each of the positioning holes 38 formed in the yoke 22, so that the rotation of the clutch outer 33 with respect to the rotor 21 and the positioning thereof are secured.

Next, the operation of the one-way clutch for linking the starter motor with the magnet generator directly connected to the engine will be described.

When the starter motor 15 is operated to start the engine 10, the output shaft 1 of the starter motor 15
6 through the drive sprocket 17, the chain 19 and the driven sprocket 18,
1 is transmitted. When the clutch inner 31 rotates in the arrow X direction shown in FIG.
Since the roller 3 rolls toward the small diameter portion 41 of the clutch chamber 40 and exhibits a wedge effect, the clutch outer 33 also rotates in the arrow X direction following the rotation of the clutch inner 31.
The torque of the clutch outer 33 is transmitted to the crankshaft 12 via the rotor 21 of the magnet generator 20, so that the engine 10 is started.

When the engine 10 is started and the rotation speed of the crankshaft 12 increases, the clutch outer 33 rotates faster than the clutch inner 31.
That is, the clutch roller 31 relatively moves in the same state as the clutch inner 31 rotates in the opposite direction, and the clutch roller 43 is moved toward the large-diameter portion 42 against the urging force of the spring 50. The coupling state between the clutch inner 31 and the clutch outer 33 is released, and the crankshaft 12
Becomes idle with respect to the starter motor 15.

According to the present embodiment, since the stopper 49 is received by the detent pin 53 orthogonal to the through hole 48, it is assumed that the stopper 49 pressed into the through hole 48 is loose. Nor does it retreat. In other words, even if the press-fit of the stopper 49 is loosened, the position of the reaction force end of the spring 50 does not shift.
The spring 50 can always maintain a predetermined elastic force, and can urge the clutch roller 43 with a predetermined elastic force. As a result, the strictness of management of the dimensional accuracy of the through hole 48 into which the stopper 49 is inserted can be reduced.

Further, since the respective stopper pins 53 for preventing the respective stoppers 49 from retracting are fitted into the respective positioning holes 38 formed in the yoke 22, the rotation between the clutch outer 33 and the rotor 21 is secured. Therefore, the clutch outer 33 and the rotor 21 can be surely integrally rotated, and other detent structures can be omitted.

Since each closing wall portion 44 of the clutch chamber 40 is provided on the side opposite to the female intaglio portion 36, it is possible to omit the clutch cover. By omitting the clutch cover, the number of parts, processing man-hours and Not only the number of assembling steps can be reduced, but also the advantage of integrally forming the main body 34 by cold rolling can be enhanced.

The present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the scope of the present invention.

For example, all the detent pins are connected to the yoke 22
It is not necessary to engage with the positioning holes 38, and at least one of them may be engaged.

The spring cap 48 can be omitted, and if omitted, the number of parts, the number of processing steps and the number of assembling steps can be reduced, so that the cost can be reduced.

[0032]

As described above, according to the present invention,
The biasing force of the spring can be appropriately maintained, and the detent between the clutch outer and the rotating body can be secured.

[Brief description of the drawings]

FIGS. 1A and 1B show a one-way clutch according to an embodiment of the present invention, in which FIG. 1A is a partially cut-away side view, and FIG. 1B is a cross-sectional view taken along line bb of FIG.

2 (a) is a partially cut-away enlarged side view, and FIG. 2 (b) is a cross-sectional view taken along line bb of FIG.

FIG. 3 is an exploded perspective view.

FIG. 4 is a front sectional view showing a magnet generator and a starter motor using a one-way clutch.

[Description of sign]

DESCRIPTION OF SYMBOLS 10 ... Engine, 11 ... Side wall, 12 ... Crankshaft, 13 ... Engine cover, 14 ... Sealed room, 15 ... Starter motor, 16 ... Output shaft, 17 ... Drive side sprocket, 18 ... Driven side sprocket, 19 ... Chain, 20
... Magnet generator, 21 ... Rotor, 22 ... Yoke, 23 ... Magnet, 24 ... Boss member, 25 ... Electrification, 30 ... One-way clutch, 31 ... Clutch inner, 32 ... Rolling bearing, 33 ... Clutch outer, 34 ... Main body, 35: clutch inner mounting hole, 36: female seal cage, 37: male seal cage,
38: positioning hole, 39: bolt, 40: clutch chamber,
41: small diameter portion, 42: large diameter portion, 43: clutch roller,
44 ... closing wall part, 45 ... roller plate, 46 ... ring-shaped part, 47 ... holding piece, 48 ... through hole, 48a ... small diameter part, 48b ... large diameter part, 49 ... stopper, 49a ... knurl processing part, 50 ... Spring, 51: Spring cap, 52: Pin insertion hole, 53: Backstop pin, 53a
… Knurled part.

Claims (1)

[Claims] 1. A clutch inner and a clutch outer which are arranged concentrically inside and outside, wherein the clutch outer is provided with a main body having a clutch inner mounting hole into which the clutch inner is fitted, and a clutch inner mounting. A plurality of clutch chambers which are arranged at intervals in the circumferential direction on the inner peripheral surface of the hole and are laid in a wedge shape outward in the radial direction, and a plurality of clutch rollers rotatably housed in the respective clutch chambers Each through-hole penetrated to the outer periphery of the main body in the large diameter portion of each of the clutch chambers in a tangential direction of the clutch inner mounting hole,
Each of the stoppers is fitted into the through hole, and each spring is inserted into each of the through holes to take a reaction force on each of the stoppers to urge each of the clutch rollers toward the small diameter side of each of the clutch chambers. In the one-way clutch, a plurality of pin insertion holes are formed in the main body so as to intersect the respective through holes, and each detent pin is opposite to each spring of each of the stoppers in each of the pin insertion holes. A one-way clutch, wherein the one-way clutch is inserted so as to receive a side end, and at least one end of each of the backstop pins is engaged with a part of a rotating body to which the clutch outer is attached.