JP2003083365A - One-way clutch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one-way clutch device certainly holding a block bearing by a holder, and improving assembling efficiency. SOLUTION: A first elastic pressing piece 41 is integrally formed on a first column 29, and in the same way, a second elastic pressing piece 43 is integrally formed on a second column 31. Both elastic pressing pieces 41, 43 are elastically contacted with a pair of projecting portions 45, 47 formed on n outer end side of a block bearing at tip ends thereof, and energize the block bearing 19 to an outer wheel side. A second annular flange 27 has an outer diameter formed slightly smaller than an inner diameter of the outer wheel 5, and is provided with a rectangular locking projection 51 corresponding to a recessed groove 15 of the outer wheel 5. The locking projection 51 is out of phase with the recessed groove 15 by a specified amount in an assembling state.

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 device incorporated in an automatic transmission of an automobile and the like, and relates to a technique for facilitating transportation work.

[0002]

2. Description of the Related Art Generally, an automatic transmission for an automobile is provided with a torque converter which is a fluid coupling and a planetary gear speed change mechanism of about 3 to 5 speeds, and a friction engagement means such as a clutch and a brake. Gear shifting is performed by appropriately fixing or releasing components of the planetary gear shifting mechanism (such as a sun gear and a planetary gear). Except for some band-type brakes, a wet multi-plate type in which friction plates and separator plates are alternately arranged is used as the friction engagement means incorporated in the automatic transmission. Pressure oil from the shift control hydraulic circuit is used for (friction engagement). In addition, some of these friction engagement means are equipped with a one-way clutch inside to facilitate the shift control by freely rotating the gear shaft or the like in one rotation direction. There is.

FIG. 6 is a front view showing an example of a conventional one-way clutch device incorporated in the friction engagement means.
Is an enlarged view of portion E in FIG. 6, and FIG. 8 is a sectional view taken along line FF in FIG. 7. The one-way clutch 1 includes a cylindrical inner ring (an output shaft and an input shaft of an automatic transmission, etc.) 3, an annular outer ring 5 coaxially arranged with the inner ring 3 and relatively rotatable, an inner ring 3 and an outer ring 5. It is composed of a large number of cylindrical rollers 7 and the like which are torque transmission members interposed between the rollers. On the inner peripheral surface of the outer ring 5, a plurality of concave cams 13 each having a valley 9 and an inclined surface 11 formed along the circumferential direction, and a plurality of concave grooves 15 formed along the axial direction. Has been formed. Each roller 7 is arranged between the outer peripheral surface of the inner ring 3 and the concave cam 13, and is biased by the accordion spring 17 to the inclined surface 11 in the concave cam. Further, each groove 15 has an outer end portion 21 of a block bearing 19 made of an oil-impregnated sintered alloy.
Are engaged with each other, and the block bearing 19 holds the space between the inner ring 3 and the outer ring 5. In the figure, reference numeral 22 is a locking claw formed on the outer periphery of the outer ring 5, and engages with a locking groove formed on the inner peripheral surface of the transmission element (not shown).

The outer ring 5 has a large-diameter first annular flange 25.
And the small-diameter second annular flange 27 to the first to fourth columns 2
A retainer 23 made of synthetic resin, which is connected by 9, 31, 33, and 35, is mounted, and the retainer 23 prevents the roller 7, the accordion spring 17, and the block bearing 19 from being separated or dropped. For example, 3
A pair of rollers 7 and an accordion spring 17 are interposed / held between the columns 29, 31, 33 and 35, and the block bearing 19 includes the first column 29 and the second column 3.
It is interposed and held between 1 and 1. In the figure, reference numeral 37 is a lip formed on the first column 29, and is engaged with a protruding portion 39 formed on the outer end side of the block bearing 19.

[0005]

In the conventional one-way clutch device, the block bearing often comes off during transportation as a sub-assembly, and there is a problem that a loss time occurs due to re-assembly in an assembly line of an automatic transmission. That is, in the above-described one-way clutch 1, since the inner ring 3 that is a component is the output shaft, the input shaft, or the like of the automatic transmission, it naturally does not exist as the sub-assembly 61 before the automatic transmission is assembled. Therefore, if some impact is applied during the transportation of the sub-assembly 61, the block bearing 19 will fall off relatively easily. In this case, the assembling operator picks up the dropped block bearing 19 and reassembles it. However, this work is irregular, which causes a decrease in the conveyor speed of the assembly line. Further, if the dropped block bearing 19 rolls into the lower part of the conveyor, the line may be stopped in some cases. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a one-way clutch device that ensures the retention of a block bearing by a retainer and thus improves assembly work efficiency.

[0006]

In order to solve the above-mentioned problems, in the invention of claim 1, an inner ring, an outer ring coaxially arranged with the inner ring so as to be relatively rotatable, and a circle on the inner peripheral surface of the outer ring. A plurality of concave cams that are formed along the circumferential direction and that include a valley portion and an inclined surface, a plurality of concave grooves that are formed along the axial direction on the inner peripheral surface of the outer ring, the outer peripheral surface of the inner ring, and the A plurality of torque transmission members interposed between the concave cam, biasing means for biasing the torque transmission members toward the inclined surface in the concave cam, and the inner groove engaged with the concave groove. And a block bearing used for maintaining a gap between the outer ring and the outer ring, and a retainer mounted on the outer ring and used for holding the torque transmission member, the urging means, and the block bearing,
A one-way clutch in which the torque transmitting member rolls from the trough side to the inclined surface side to transmit torque between the inner ring and the outer ring only when the inner ring and the outer ring rotate in one direction. In the device, it is proposed that a pair of elastic pressing pieces that are engaged with both circumferential ends of the block bearing and are used for pressing the block bearing into the groove of the outer ring are formed in the cage. . According to the present invention, when the block bearing is positioned at a predetermined portion of the cage and incorporated into the outer ring, the elastic pressing piece is elastically deformed and the block bearing is pressed against the outer ring with a predetermined pressing force. Will not fall out.

According to a second aspect of the invention, in the one-way clutch device of the first aspect, the cage includes a first flange having a diameter larger than the inner diameter of the outer ring and a second flange having a diameter smaller than the inner diameter of the outer ring. And, on the outer periphery of the second flange, while passing through the concave groove in the assembly stage,
It is proposed that a locking projection having a rotational phase different from that of the concave groove in the assembled state is projected. According to this invention, when the retainer is mounted on the outer ring by passing the retaining protrusion of the second flange through the groove and then rotating the retainer by a predetermined amount, the retaining protrusion abuts and engages with the side surface of the outer ring. It will be stopped and the cage will not fall off the outer ring.

Further, the invention of claim 3 proposes the one-way clutch device of claim 1 or 2, wherein the cage is made of synthetic resin. According to the present invention, the weight of the cage and the one-way clutch can be reduced, and at the same time, the elastic pressing piece and the cage can be easily integrally formed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the one-way clutch device according to the present invention, and FIG. 2 is A in FIG.
3 is a sectional view taken along line A in FIG. 3, FIG. 3 is a view taken in the direction of arrow B in FIG. 2, FIG. 4 is an enlarged view of portion C in FIG. 1, and FIG.
FIG. The one-way clutch device of the present embodiment is installed in the friction engagement means of an automatic transmission for automobiles, and its overall configuration is the same as that of the conventional device described above.

The one-way clutch 1 has a cylindrical inner ring 3
And an annular outer ring 5 arranged coaxially with the inner ring 3 so as to be rotatable relative to each other, and a large number of cylindrical rollers 7 serving as torque transmitting members interposed between the inner ring 3 and the outer ring 5 and the like. Has been done. On the inner peripheral surface of the outer ring 5, a plurality of concave cams 13 each having a valley portion 9 and an inclined surface 11 formed along the circumferential direction.
And a plurality of recessed grooves 15 formed along the axial direction.

Each roller 7 has an outer peripheral surface of the inner ring 3 and the concave cam 1.
3 and is urged toward the inclined surface 11 in the concave cam by the accordion spring 17. An outer end 21 of a block bearing 19 made of an oil-impregnated sintered alloy is engaged with each groove 15, and the block bearing 19 holds the space between the inner ring 3 and the outer ring 5. In the figure, reference numeral 22 denotes a locking projection formed on the outer circumference of the outer ring 5, which engages with a locking groove formed on the inner peripheral surface of the transmission element (not shown).

The outer ring 5 of the present embodiment is equipped with a cage 23 made of synthetic resin and having substantially the same shape as that of the conventional apparatus. The cage 23 separates the roller 7, the accordion spring 17, and the block bearing 19 from each other. It is prevented from falling off. The retainer 23 includes a large-diameter first annular flange 25 and a small-diameter second annular flange 27 in the first to fourth columns 2.
9, 31, 33, 35 are connected to each other, and three sets of rollers 7 and accordion springs 17 are interposed and held between the columns 29, 31, 33, 35 to connect the first column 29 and the second column 31 to each other. Block bearing between 1
9 is inserted and held.

As shown in FIG. 4, a first elastic pressing piece 41 is integrally formed on the first column 29 and the second column 3 is formed.
Similarly, the first elastic pressing piece 43 is integrally formed on the first unit 1. In the case of this embodiment, both elastic pressing pieces 41 and 43 are
The tip ends are elastically contacted with a pair of projecting portions 45 and 47 formed on the outer end side of the block bearing 19, respectively, and urge the block bearing 19 toward the outer ring 5 side. The outer diameter of the second annular flange 27 is set to be slightly smaller than the inner diameter of the outer ring 5 and has a rectangular locking projection 51 corresponding to the groove 15 of the outer ring 5. This locking protrusion 51 is
In the assembled state, the groove 15 and the phase in the rotational direction are deviated by a predetermined amount.

In this embodiment, the sub-assembly 61 of the one-way clutch 1 is assembled in the following procedure. That is, the assembling worker first attaches the roller 7 and the accordion spring 17 to predetermined positions of the cage 23, and then aligns the locking projection 51 with the concave groove 15 and then from the second annular flange 27 side to the outer ring. Insert into 5.

Next, the assembling operator rotates the retainer 23 by a predetermined amount to shift the rotational phases of the concave groove 15 and the locking projection 51, so that the locking projection 51 abuts / locks on the side surface of the outer ring 5. By doing so, the retainer 23 is prevented from falling off the outer ring 5. Then, the assembling operator takes the first column 29 and the second column 31.
The block bearing 19 is pushed into the retainer 23 from between and the outer end portion 21 is fitted into the groove 15.

Then, as shown in FIG. 4, the first elastic pressing piece 41 and the second elastic pressing piece 43 make elastic contact with the projecting portions 45 and 47 formed at both ends of the block bearing 19 in the circumferential direction, The block bearing 19 is biased toward the outer ring 5 side. As a result, the block bearing 19 moves to the cage 2
3 is firmly held and is strongly pressed against the inner peripheral surface of the outer ring 5.

In the present embodiment, by adopting such a configuration, the block bearing 19 does not easily fall off even when a shock is applied in the state of the sub-assembly 61, and the block bearing 19 retains. Since the inner peripheral end of 23 does not project to the inner ring 3 side, the assembly work can be carried out extremely smoothly.

The description of the specific embodiment is finished above.
Aspects of the invention are not limited to this embodiment.
For example, although a cylindrical roller is used as the torque transmission member in the above embodiment, a steel ball or the like may be used instead of the roller. Further, the elastic pressing piece, the specific shape of the retainer, the inner and outer rings, and the like are not limited to those in the above-described embodiment, and may be appropriately changed depending on the design.

[0019]

As is apparent from the above description, according to the first aspect of the invention, the inner ring, the outer ring coaxially arranged with the inner ring so as to be relatively rotatable, and the inner ring of the outer ring have a circle. A plurality of concave cams that are formed along the circumferential direction and that include a valley portion and an inclined surface, a plurality of concave grooves that are formed along the axial direction on the inner peripheral surface of the outer ring, the outer peripheral surface of the inner ring, and the A plurality of torque transmission members interposed between the concave cam, biasing means for biasing the torque transmission members toward the inclined surface in the concave cam, and the inner groove engaged with the concave groove. An inner ring, and a block bearing used to hold a space between the outer ring and the outer ring; and a retainer mounted to the outer ring and used to hold the torque transmission member, the urging means, and the block bearing. And the torque transmitting member is rotated only in the one-way relative rotation with the outer ring. From part side rolling on the inclined surface side,
In a one-way clutch device that transmits torque between the inner ring and the outer ring, a pair of clutches that engage with both circumferential ends of the block bearing and are used to press the block bearing into the groove of the outer ring. Since the elastic pressing piece is formed on the cage, when the block bearing is pushed into a predetermined portion of the cage, the elastic pressing piece elastically deforms and presses the block bearing to the outer ring side,
The block bearing will not fall off easily and the assembly work will be carried out smoothly.

According to a second aspect of the present invention, in the one-way clutch device according to the first aspect, the one-way clutch device has a first flange having a diameter larger than the inner diameter of the outer ring and a second flange having a diameter smaller than the inner diameter of the outer ring. On the outer periphery of the second flange, a locking projection that passes through the concave groove in the assembling stage and has a rotational phase different from that of the concave groove in the assembled state is projected. The cage will not come off from the outer ring because it is abutted and locked on the side surface of the outer ring.

According to the third aspect of the invention, in the one-way clutch device of the first or second aspect, since the cage is made of synthetic resin, the cage and the one-way clutch are lightweight, and at the same time the block bearing is used. When you push in, the cage is easily elastically deformed,
Assembly workability is improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a one-way clutch device according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a view on arrow B in FIG.

FIG. 4 is an enlarged view of a C portion in FIG.

5 is a cross-sectional view taken along the line DD in FIG.

FIG. 6 is a front view showing an example of a conventional one-way clutch device.

FIG. 7 is an enlarged view of a portion E in FIG.

8 is a cross-sectional view taken along line FF in FIG.

[Explanation of symbols]

1 ... One-way clutch 3 ... Inner ring 5 ... Outer ring 7 ... Laura 9 ... Tanibe 11 ... Inclined surface 13 ... Recessed cam 15 ... Recessed groove 17 accordion spring 19 Block bearing 23 ... Cage 25 ... 1st annular flange 27 ... Second annular flange 29 ... First column 31 ... Second column 33 ... 3rd column 35 ... 4th column 41 ... First elastic pressing piece 43 ... Second elastic pressing piece 45, 47 ... Projection 51 ... Locking protrusion 61 ... Sub-ass

Claims (3)

[Claims] 1. An inner ring, an outer ring arranged coaxially with the inner ring so as to be rotatable relative to each other, and a plurality of outer rings formed on an inner circumferential surface of the outer ring along a circumferential direction and having valleys and inclined surfaces. A concave cam, a plurality of concave grooves formed along the axial direction on the inner peripheral surface of the outer ring, a plurality of torque transmission members interposed between the outer peripheral surface of the inner ring and the concave cam, An urging means for urging the torque transmission member toward the inclined surface in the concave cam; a block bearing engaged with the concave groove and used for maintaining a gap between the inner ring and the outer ring; It has a retainer that is mounted and that is used to hold the torque transmission member, the biasing means, and the block bearing, and the torque transmission member operates only when the inner ring and the outer ring are relatively rotated in one direction. Rolling from the valley side to the slope side, the inner ring and the outer side In a one-way clutch device that transmits torque between the block bearing, the pair of elastic pressing pieces that engage with the circumferential ends of the block bearing and are used to press the block bearing into the groove of the outer ring are provided. A one-way clutch device characterized by being formed in a cage. 2. The cage has a first flange having a diameter larger than the inner diameter of the outer ring and a second flange having a diameter smaller than the inner diameter of the outer ring, and an assembling step is provided on the outer periphery of the second flange. 2. The one-way clutch device according to claim 1, further comprising: a locking protrusion that passes through the concave groove and has a rotational phase different from that of the concave groove in an assembled state. 3. The one-way clutch device according to claim 1, wherein the cage is made of synthetic resin.