JPH07317808A - Complex bearing for one-way clutch - Google Patents

Abstract

PURPOSE:To provide one-way clutch complex bearing having a small width, with which the operation of one-way clutch can be achieved with good accuracy. CONSTITUTION:A bearing outer ring 3, clutch outer ring 4, and slide bearing 5 are installed on the outside of a common inner ring 2. At the bore of the bearing outer ring 3 a raceway groove 6a for guiding balls is formed eccentrically toward the clutch outer ring 4 from the center of the bearing width so that the width of the resultant one-way clutch complex bearing is lessened. A flange 14 pinched by the clutch outer ring 4 and slide bearing 5 is installed on a retainer which is set between the clutch outer ring 4 and common inner ring 2, and thereby dislocation of the retainer 10 in the axial direction is preclude. The radial load is borne by a ball bearing consisting of the outer ring 3 and the slide bearing 5 so that the clutch outer ring 4 is prevented from application of a large radial load or an eccentric load, and thereby the one-way clutch is allowed to operate with good accuracy.

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 compound bearing comprising a combination of a pair of bearings supporting a radial load and a one-way clutch.

[0002]

2. Description of the Related Art Generally, in an internal combustion engine, driving energy is generated only during an explosion process, and driving force is not generated in other processes, so that the crankshaft undergoes angular velocity fluctuations.

For this reason, a flywheel is attached to the crankshaft during a normal internal combustion period to increase the inertial force and suppress fluctuations in angular velocity. However, due to the torsional strength of the crankshaft, the inertial force is increased. There is a limit to this, and it is not possible to completely suppress angular velocity fluctuations.

Therefore, when an auxiliary machine such as an alternator having a large inertial force is driven through a belt transmission by using a crankshaft whose angular speed fluctuates slightly as a drive source, the rotation of the auxiliary machine is caused by the angular speed fluctuation of the crankshaft. Slip occurs between the pulley provided on the shaft and the belt, which causes a problem that the belt is easily worn.

In order to solve the above-mentioned problems, in the belt transmission device disclosed in Japanese Patent Laid-Open No. 61-228153, a rotary shaft of an auxiliary machine and a pulley supported by the rotary shaft are provided. Incorporating a one-way clutch into the, when the angular velocity of the crankshaft increases, the rotation of the crankshaft is transmitted to the rotary shaft, and when the angular velocity of the crankshaft decreases, the rotation transmission to the rotary shaft is cut off to suppress the fluctuation of the angular velocity of the rotary shaft. It prevents slippage between the belt and pulley.

[0006]

If a one-way clutch is directly installed between the rotary shaft and the pulley, a radial load acts on the one-way clutch and the one-way clutch cannot be operated accurately, and
The load capacity of the pulley against radial load is reduced.

An object of the present invention is to provide a one-way clutch composite bearing which can prevent an unbalanced load from acting on the one-way clutch and which can be easily assembled at a low cost.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a common inner ring, a bearing outer ring forming a ball bearing with the inner ring, and a clutch forming a one-way clutch with the inner ring. An outer ring and a slide bearing rotatably provided relative to the inner ring, and a raceway groove for ball guide is formed on the inner diameter surface of the bearing outer ring, and the raceway groove is formed on the outer diameter surface of the inner ring. The cage groove is provided so as to face each other, and the retainer incorporated between the clutch outer ring and the common inner ring to hold the clutch roller is provided with a flange sandwiched between the clutch outer ring and the slide bearing. .

Here, it is preferable that the raceway groove of the bearing outer ring is formed so as to be offset from the center of the bearing width of the bearing outer ring toward the clutch outer ring side to reduce the overall width dimension.

Further, the clutch outer ring and the bearing outer ring may be commonly used to reduce the number of parts.

Further, instead of the slide bearing, a slide bearing portion may be provided at an end portion of the retainer of the one-way clutch, which protrudes outward from the clutch outer ring.

[0012]

As described above, since the bearing outer ring and the slide bearing are provided on both sides of the clutch outer ring, the ball bearing and the slide bearing, which are the bearing outer ring, can receive the radial load, so that the clutch outer ring is large. It is possible to prevent a radial load or an unbalanced load from acting.

Further, since the raceway groove of the bearing outer ring is formed so as to be offset toward the clutch outer ring side, the overall width dimension becomes smaller as compared with the case where the bearing outer ring having the raceway groove formed in the center of the bearing width is used. Moreover, since the inner ring is common, the number of parts is reduced, and the cost can be reduced.

Further, the outer ring of the ball bearing and the outer ring of the one-way clutch are commonly used, or the slide bearing is provided in the retainer of the one-way clutch instead of the slide bearing, so that the number of parts is reduced and the assemblability is improved. It is possible to improve and reduce manufacturing depreciation.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment of a one-way clutch composite bearing according to the present invention and show a state in which it is incorporated inside a pulley 1.

The one-way clutch compound bearing has a common inner ring 2 and a bearing outer ring 3 which forms a ball bearing with the inner ring 2.
And a common outer race 2 and a clutch outer race 4 forming a one-way clutch, and a plain bearing 5.

A raceway groove 6a for ball guide is formed on the inner diameter surface of the bearing outer ring 3 at a position deviated from the center of the bearing width toward the clutch outer ring 4 side, and the raceway groove 6a and the outer diameter surface of the common inner ring 2 are formed. The balls 7 are incorporated between the formed raceway grooves 6b. Further, a seal 8 is mounted between the side portions of the bearing outer ring 3 and the common inner ring 2 to prevent dust from entering the bearing.

On the inner diameter surface of the clutch outer ring 4, a plurality of cam surfaces 9 are formed at equal intervals in the circumferential direction. A retainer 10 is incorporated between the clutch outer ring 4 and the inner ring 2, and a pocket 11 is provided at a position of the retainer 10 facing the cam surface 9.
Is formed, and the roller 12 is incorporated in each pocket 11. The roller 12 is pressed by the elastic member 13 in the direction of clutch engagement with the cam surface 9 and the outer diameter surface of the inner ring 2.

The cage 10 has a pair of flanges 14 and 15 at both ends in the axial direction. One of the flanges 14 is sandwiched between the clutch outer ring 4 and the slide bearing 5, and by the sandwiching, the cage 10 is retained. It is prevented from moving in the direction.

On the outer diameter surface of the other flange 15 of the retainer 10, the engagement projection 1 that engages with the cam surface 9 of the clutch outer ring 4 is formed.
6 is provided, and the retainer 10 is prevented from rotating with respect to the clutch outer ring 4 by the engagement between the engagement protrusion 16 and the cam surface 9.

The plain bearing 5 is made of a sintered oil-impregnated bearing material or synthetic resin. The slide bearing 5 is press-fitted into the inner diameter surface of the pulley 1 and is rotatably supported relative to the common inner ring 2.

A seal 17 is provided on the outer side of the plain bearing 5, and the seal 17 allows the pulley 1 and the common inner ring 2 to be provided.
The ends are sealed to prevent dust from entering the inside.

The one-way clutch compound bearing having the above structure is mounted inside the pulley 1 by means of press fitting. In order to stabilize the mounting, the pulley 1
The inner diameter portion of one end surface of the bearing is crimped, and the crimping piece 18 is engaged with the side surface outer diameter portion of the bearing outer ring 3.

In the one-way clutch compound bearing, since the bearing outer ring 3 and the slide bearing 5 are provided on both sides of the clutch outer ring 4, the radial load acting when the pulley 1 rotates is formed by the bearing outer ring 3. It can be supported by a ball bearing and a slide bearing 5.

Therefore, a large radial load or an unbalanced load does not act on the clutch outer ring 4, and the one-way clutch can be operated accurately.

Further, since the bearing outer ring 3 is formed by locating the raceway groove 6a for ball guide to the clutch outer ring 4 side.
The bearing width is smaller than that of a bearing outer ring having a raceway groove formed in the center of the bearing width, and it is possible to prevent the pulley 1 from increasing in size.

4 to 6 show another example of the one-way clutch composite bearing according to the present invention.

In the embodiment shown in FIG. 4, the bearing outer ring 3 and the clutch outer ring 4 of the embodiment shown in FIG. 1 are common. 1
9 indicates the common outer ring.

As described above, by using the bearing outer ring and the clutch outer ring in common, the number of parts can be reduced, the cost can be reduced, and the contact area between the pulley 1 and the common outer ring 19 can be increased. Even if the tightening margin of the common outer ring 19 with respect to the inner diameter of the pulley 1 is reduced, the required capacity transmission can be obtained between the pulley 1 and the common outer ring 19.

In the embodiment shown in FIG. 5, an angular contact type bearing outer ring having a counterbore is used as the bearing outer ring 3, and the same parts are designated by the same reference numerals and their description is omitted. As described above, by using the angular contact type bearing outer ring 3, the bearing outer ring 3 is attached from one side of the pulley 1 after the assembly of the inner ring 2, the clutch outer ring 4 and the slide bearing 5 is assembled inside the pulley 1. Since it can be assembled, the assembling property can be improved.

Further, since the bearing outer ring 3 is of the angular contact type, the load capacity against a radial load is improved.

In the embodiment shown in FIG. 6, instead of the slide bearing 5 shown in FIG. 1, a synthetic resin cage 10 of a one-way clutch is provided with a slide bearing portion 20 which is press-fitted into the inner diameter surface of the pulley 1, and the sliding thereof is performed. A protrusion 21 is formed on the outer diameter surface of the bearing portion 20, and the protrusion 21 is engaged with an engagement groove 22 formed on the inner diameter surface of the pulley 1 to prevent the cage 10 from moving in the axial direction. .

A ridge is formed on the inner diameter surface of the pulley 1,
The sliding bearing portion may be provided with an engaging groove to prevent axial movement of the retainer.

As described above, the slide bearing portion 2 is attached to the cage 10.
By providing 0, the sliding bearing 5 shown in FIG. 1 can be omitted, so that the number of parts can be reduced, the cost can be reduced, and the assembling property can be improved.

In the embodiment, the use example in which the one-way clutch composite bearing according to the present invention is assembled inside the pulley is shown, but the assembly component of the one-way clutch composite bearing is not limited to the pulley. For example, it may be a gear.

[0037]

Since the present invention is configured as described above, it has the following effects.

In the one-way clutch compound bearing according to the first aspect of the present invention, since the radial load is supported by the ball bearing provided on one side of the clutch outer ring and the sliding bearing provided on the other side, a large outer ring of the clutch is provided. The one-way clutch can be operated with high accuracy without applying radial load or unbalanced load.

Further, since the inner ring is common, the number of parts is small and the cost can be reduced, and since the bearing outer ring, the clutch outer ring and the slide bearing are provided on the common inner ring, a composite structure product is obtained. Easy to assemble to pulleys etc.

In the one-way clutch composite bearing according to the second aspect, since the raceway groove of the bearing outer ring is formed so as to be offset from the center of the bearing width toward the clutch outer ring side, the overall width dimension can be reduced.

In the one-way clutch composite bearing according to claim 3, since the bearing outer ring and the clutch outer ring are commonly used, the number of parts is reduced, the cost can be reduced, and the rotating member can be effectively used. Even if the tightening margin of the common outer ring is reduced, the required power transmission can be obtained, and the assembling can be facilitated.

In the one-way clutch composite bearing according to claim 4, the angular contact type bearing outer ring having the counterbore is used. After the mounting, the bearing outer ring can be mounted. Therefore, the assemblability can be improved, and since the bearing outer ring is of the angular contact type, the load capacity against a radial load can be improved.

In the one-way clutch composite bearing according to the fifth aspect of the invention, since the cage is provided with the sliding bearing portion, the number of parts can be further reduced, and the assemblability can be improved and the cost can be reduced. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a one-way clutch composite bearing according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view showing a part of the above holder.

FIG. 4 is a sectional view showing another embodiment of the above one-way clutch composite bearing.

FIG. 5 is a sectional view showing another embodiment of the one-way clutch composite bearing of the above.

FIG. 6 is a sectional view showing another embodiment of the above one-way clutch composite bearing.

[Explanation of symbols]

 2 Inner ring 3 Bearing outer ring 4 Clutch outer ring 5 Sliding bearing 6a, 6b Raceway groove 7 Ball 10 Cage 14 Flange 19 Common outer ring 20 Sliding bearing part

Claims (5)

[Claims] 1. A common inner ring, a bearing outer ring that forms a ball bearing with the inner ring, a clutch outer ring that forms a one-way clutch with the inner ring, and a slide bearing that is rotatable relative to the inner ring. And a raceway groove for ball guide is formed on the inner diameter surface of the bearing outer ring, and a raceway groove is provided on the outer diameter surface of the inner ring so as to face the raceway groove, and between the clutch outer ring and the common inner ring. A one-way clutch compound bearing in which a cage that is incorporated and holds the clutch roller is provided with a flange that is sandwiched between the clutch outer ring and the slide bearing. 2. The one-way clutch composite bearing according to claim 1, wherein the raceway groove of the bearing outer ring is formed by displacing from the center of the bearing width of the bearing outer ring to the clutch outer ring side. 3. The one-way clutch composite bearing according to claim 1, wherein the clutch outer ring and the bearing outer ring are common. 4. The one-way clutch composite bearing according to claim 1, wherein the bearing outer ring is an angular bearing outer ring having a counterbore. 5. A slide bearing portion is provided at an end portion of the one-way clutch, which is located outside the clutch outer ring, instead of the slide bearing portion.
One-way clutch composite bearing described in 3.