JPH0788285A - Alignment type roller clutch - Google Patents

Abstract

PURPOSE:To simplify the mounting structure of an alignment type roller clutch, which is to restrict the rotating direction of a rotary shaft and which can absorb its eventual eccentricity and/or inclination, wherein the rotary shaft is supported on a body frame rotatably with rolling bearing interposed. CONSTITUTION:A bearing housing 6 to accommodate a rolling bearing 3 is formed rigidly on a body frame, and the peripheral flange 5b on a clutch housing 5 to accommodate a roller clutch 2 is detained with the bore flange 6b of the mentioned bearing housing 6 about the axial direction through a ring- shaped member 7 which is made of a resin, and a notch 5d and claw 6c to be engaged by each other about the circumferential direction are formed distributionally in/on the clutch housing 5 and bearing housing 6, respectively. Gaps S1, S2 in the radial and the axial direction are formed for the clutch housing 5 to have a play relative to the bearing housing 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centering type roller clutch mounting structure, and can be used, for example, in a rotary drive system for a washing and dewatering tub in a fully automatic washing machine.

[0002]

2. Description of the Related Art In a fully automatic washing machine, washing and dewatering of laundry is performed in one tank (laundry / dehydration tank). Therefore, the washing / dehydrating tank is stopped during washing and should be rotated only during dewatering. Has become. The rotation control of the washing / dehydrating tub is performed by controlling the rotation of the cylindrical tub shaft extending downward from the center of the bottom surface. That is, a fan shaft, which is connected to a rotary drive source so as to rotate freely in the forward and reverse directions, is inserted through the tubular tank shaft, and the forward and reverse rotation of the tubular tank shaft is restricted by a one-way clutch and a brake belt during washing. On the other hand, only the fan shaft is rotated forward / reversely, when dehydration is performed, the restraint by the brake belt is released, and the fan shaft is rotated in the free direction of the one-way clutch to integrally rotate the tubular tank shaft and the fan shaft. Then, when the dehydration is completed, the brake belt is operated to stop the rotation of the tubular tank shaft.

A roller clutch is often used as the one-way clutch. The roller clutch is
For example, an inner ring is provided with a plurality of cam surfaces, and each cam surface forms an outer ring that forms a plurality of wedge spaces with the outer peripheral surface of the rotating shaft to be controlled, and a needle roller arranged in each wedge space. A retainer having a plurality of pockets for accommodating the needle rollers, and spring means for pressing the needle rollers toward the narrow gap side of the wedge space. With respect to the positive rotation of the rotary shaft, the needle roller engages with the narrow gap portion of the wedge space to transmit torque. On the contrary, with respect to the reverse rotation of the rotary shaft, the frictional force between the rotary shaft causes the needle roller to move against the force of the spring means, and the needle roller separates from the narrow space of the wedge space to transmit torque. Is cut off. The spring means quickly shifts the needle roller from the disengaged state to the engaged state, and enhances the responsiveness of the clutch.

Since the original function of the roller clutch is to transmit / shut off torque and does not have sufficient load-bearing capacity itself, conventionally, a roller clutch and a rolling bearing have been used together to support a rotating shaft. The rolling bearing is responsible for the function, and the roller clutch is responsible only for the original torque transmission / interruption function. Specifically, a so-called separated type in which a separate roller clutch and rolling bearing are separately mounted on the main body frame, and a unit type in which a roller clutch and a rolling bearing are integrally unitized and are mounted on the main body frame are known. There is. And
With regard to the separated type, conventionally, the clutch housing is generally fixed to the main body frame with bolts and nuts.

[0005]

There is a case where the rotary shaft is tilted due to a mounting error or the like, and when the rotary shaft is largely tilted, an unbalanced load acts on the outer ring of the roller clutch during torque transmission, so that each cam. It is expected that the torque is not evenly transmitted to the surfaces and the durability of the cam surface is affected. Further, the durability of the spring means for pressing the needle roller is also a concern. In particular, in a fully automatic washing machine, a large centrifugal force acts on the rotating shaft, so it is necessary to take measures against eccentricity and inclination of the rotating shaft.

However, in the case of the separated type, it is necessary to fix the clutch housing to the main body frame, but there is a problem that it takes man hours to fix the clutch housing with the bolts and nuts as in the conventional case.

Therefore, a main object of the present invention is to simplify the mounting structure of the roller clutch of the separation type, which has a centering function of absorbing the eccentricity and inclination of the rotating shaft.

[0008]

A centering type roller clutch according to the present invention is a roller clutch for restricting a rotation direction of a rotating shaft rotatably supported by a main body frame via a rolling bearing. The bearing housing for accommodating is integrally formed with the main body frame, and the outer diameter flange portion of the clutch housing for accommodating the roller clutch and the inner diameter flange portion of the bearing housing are axially engaged with each other and are engaged with each other in the circumferential direction. It is possible to align the clutch housing with the main body frame by distributively providing mating claws and notches in the bearing housing and the clutch housing, and by providing radial and axial gaps for allowing the clutch housing to float with respect to the bearing housing. It is attached to.

The rotation preventing means for the clutch housing with respect to the bearing housing is composed of a claw portion and a notch portion that engage with each other in the circumferential direction. These notch portion and claw portion are provided in the clutch housing and the bearing housing. Providing in a distributed manner. In other words, the claw portion may be provided on the bearing housing and the cutout portion may be provided on the clutch housing, and vice versa.

Further, the centering type roller clutch according to the present invention is a roller clutch for restricting a rotation direction of a rotating shaft rotatably supported by a body frame via a rolling bearing, and a bearing housing for accommodating the rolling bearing. Is formed integrally with the main body frame, and the outer diameter flange portion of the clutch housing that houses the roller clutch and the inner diameter flange portion of the bearing housing are axially engaged via an annular member made of resin or rubber, and , The clutch housing by distributively providing pawls and notches that engage with each other in the circumferential direction in the bearing housing and the clutch housing, and by providing radial and axial gaps for allowing the clutch housing to float with respect to the bearing housing. Is attached to the body frame so that it can be aligned.

The pawl portion may be provided on the bearing housing and the notch portion may be provided on the clutch housing (claim 3).
The reverse is also possible (Claim 4).

[0012]

The existence of the radial clearance and the axial clearance allows the clutch housing to move relative to the bearing housing within the clearance. Therefore, when the rotary shaft is tilted or eccentric, the clutch housing moves in the radial direction and the axial direction in response to such movement of the rotary shaft, and maintains the aligned state of the roller clutch with respect to the rotary shaft. In this way, even if the rotating shaft is eccentric or tilted, the roller clutch is automatically aligned to prevent an eccentric load during torque transmission, and a stable clutch function is ensured.

By engaging the outer diameter flange portion of the clutch housing and the inner diameter flange portion of the bearing housing in the axial direction, the clutch housing is prevented from coming off.
Further, the cutout portions and the pawl portions, which are distributively provided in the clutch housing and the bearing housing, engage with each other in the circumferential direction, so that the clutch housing is prevented from rotating.

According to the second aspect of the present invention, the clutch housing is prevented from coming off by axially engaging the outer diameter flange portion of the clutch housing and the inner diameter flange portion of the bearing housing via an annular member made of resin or rubber. Is done. By interposing an annular member made of resin or rubber between the bearing housing and the clutch housing, the annular member absorbs shocks and vibrations that are likely to occur due to ON / OFF operation of the roller clutch.

The cutouts and the pawls, which are distributively provided on the clutch housing and the bearing housing, engage with each other in the circumferential direction to prevent the clutch housing from rotating.

According to the third aspect of the invention, the clutch housing is prevented from rotating by the engagement of the claw portion of the bearing housing and the notch portion of the clutch housing.

According to the fourth aspect of the invention, the clutch housing is prevented from rotating by the engagement of the notch portion of the bearing housing and the claw portion of the clutch housing.

[0018]

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

As shown in FIGS. 1 and 2 (enlarged view of FIG. 1a), a rotating shaft (1) is rotatably supported by a body frame 4 which is a stationary member via a rolling bearing 3, and this rotating shaft is rotatable. The roller clutch (2) for controlling the rotation of (1) is attached to the main body frame (4) via the clutch housing (5) in a state where its axis is aligned with the rolling bearing (3). Although a sealed deep groove ball bearing is illustrated as the rolling bearing, an angular ball bearing or other bearings may be used.

The bearing housing (6) for accommodating the rolling bearing (3) is formed integrally with the main body frame, and the cylindrical portion (6) is fitted with the outer ring (3a) of the rolling bearing (3).
a), an inner diameter flange portion (6b) continuous from one end of the cylindrical portion (6a) to the inner diameter side, and a plurality (three in FIG. 1b) formed at equal intervals in the circumferential direction of the inner diameter flange portion (6b). And a claw portion (6c). The claw portion (6c) is formed by making a cut in the inner diameter flange portion (6b) and bending that portion inward.

The roller clutch (2) has a shell type outer ring (2a) which is fitted with the clutch housing (5). A plurality of cam surfaces (2a1) on the inner peripheral surface of the outer ring (2a)
Is formed, and a plurality of wedge spaces are formed between the cam surface (2a1) and the outer peripheral surface of the rotating shaft (1), or between the outer peripheral surface of the inner ring when an inner ring is provided. . A needle roller (2b) is arranged in each wedge space so that it can be engaged and disengaged. The needle roller (2b) is housed in a pocket of a cage (2c) made of resin, for example, and the cage (2b) is
The narrow space side of the wedge space is pressed by the spring means (2d) interposed between the side wall of the pocket of (c) and the outer peripheral surface of the needle roller (2b). The outer ring (2a) can be omitted by forming a cam surface on the cylindrical portion (5a) of the clutch housing (5).

Regarding the function of the roller clutch (2),
Since it is the same as the above-mentioned conventional one, its explanation is omitted here. It should be noted that the present invention relates to a roller clutch mounting structure and is not intended for a specific roller clutch. For example, a two-way roller other than the one having the basic configuration as described above. Since various roller clutches such as clutches are known, they can be appropriately selected and used from among them when carrying out the present invention.

The clutch housing (5) for accommodating the roller clutch (2) has an outer ring (2) of the roller clutch (2).
a) A cylindrical portion (5a) fitted with the cylindrical portion (5a), an outer diameter flange portion (5b) continuous from the other end of the cylindrical portion (5a) to the outer diameter side, and a continuous inner diameter side from one end of the cylindrical portion (5a). Brim (5
c) and a plurality of (three in FIG. 1b) claw portions (6c) formed at equal intervals in the circumferential direction of the outer diameter flange portion (5b). The notch portion (5d) and the claw portion (6c) engage with each other in the circumferential direction, whereby the clutch housing (5) is prevented from rotating with respect to the bearing housing (6), and a reliable clutch function is exerted. To be done.

An annular member (7) made of resin or rubber is inserted into the end portion of the cylindrical portion (6a) of the bearing housing (6) on the inner diameter flange portion (6b) side. This annular member (7)
One end surface of the concave portion has an outer diameter slightly larger than the diameter of the outer diameter flange portion (5b) of the clutch housing (5) and a depth slightly larger than the wall thickness of the outer diameter flange portion (5b). The place (7a) is formed. Also, the annular member (7)
Has a notch (7b) at a position corresponding to the claw (6c) of the bearing housing (6).

The outer diameter flange portion (5b) of the clutch housing (5) is received in the recess (7a) of the annular member (7), and a radial gap (S1) is formed on the outer periphery of the outer diameter flange portion (5b). ) Is formed. Also, the outer diameter flange (5
b) is a bearing housing (6) via an annular member (7)
Axially engages the inner diameter flange portion (6b). This prevents the clutch housing (5) from coming out to the right in FIGS. 1b and 2. The movement of the clutch housing (5) in the opposite direction is restricted by the width surface of the outer ring (3a) of the rolling bearing (3). That is, the clutch housing (5) can move in the axial direction within the axial gap represented by S2. These gaps (S1, S
2) is on the order of 0.5 mm, for example. Due to the existence of the gaps (S1, S2), the clutch housing (5) and the roller clutch (2) housed in the clutch housing (5) are radially and axially opposed to the main body frame (4) and the bearing housing (6). Can be moved to. Therefore, for example, when the rotation shaft (1) is tilted due to a mounting error or the like, the roller clutch (2) is displaced in the range of the clearances (S1, S2) according to the tilt of the rotation shaft (1), and the roller clutch (2) is moved. ) And the axis of rotation (1) are automatically aligned.

3 to 8 show another embodiment of the present invention. 3 to 8, members and portions substantially the same as those in the above-described embodiment are designated by the same reference numerals, and duplicate description will be omitted.

In the embodiment shown in FIG. 3, the bearing housing (6) is provided with a notch (6c ') and the clutch housing (5) is provided with a claw (5d'). In this embodiment, the outer diameter flange portion (5b) of the clutch housing (5) is formed into a plurality (six in FIG. 3b) of claws at equal intervals around the circumference, and some of them (one in FIG. 3b) are formed. Bend the claws (3 every other) outwards (5)
d ') are formed. Further, the edge portion (7b ') of the cutout portion (7b) of the annular member (7) is projected from the end surface (a portion having a U shape in FIG. 3b), and the cutout portion (6) of the bearing housing (6). 6c ') is fitted and fitted. The radial gap (S1) is defined by the inner diameter of the cutout portion (7b) of the annular member (7) and the clutch housing (5).
It is provided between the outer diameter of the claw portion (5d ') and the outer diameter of the claw portion (5d'). still,
The claw portion (5d ′) may be formed by making a notch in the annular outer diameter flange portion (5b) and bending the portion outward according to the configuration shown in FIGS. Conversely, the claw portion (6c) shown in FIGS. 1 and 2 may be formed according to the configuration of this embodiment.

The embodiment shown in FIG. 4 does not include the annular member (7) in FIG. The other basic configuration is the same as that shown in FIG.

In the embodiment shown in FIG. 5, the bearing housing (6) is provided with a notch (6c ') and the clutch housing (5) is provided with a claw (5d'). In this embodiment, a part of the inner diameter flange portion (6b) of the bearing housing (6) is bent outward, and this bent portion is cut out in a window shape at a plurality of locations (three locations in FIG. 5b) at equal intervals around the circumference. Thus, the notch (6c ') is formed. Further, the outer diameter flange portion (5b) of the clutch housing 5 is slightly shortened so that the outer diameter flange portion (5b) has a plurality of circumferentially equally spaced portions (three in FIG. 5b) to the claw portion (5).
d ') is continuous in the outer diameter direction. In addition, as shown in FIG. 7, the notch portion (6c ′) has an inner diameter flange portion (6c ′).
The shape of b) may be cut out from the inner diameter.

In the embodiment shown in FIG. 6, the bearing housing (6) is provided with a claw portion (6c), and the clutch housing (5) is provided with a notch portion (5d). In this embodiment, the inner diameter flange portion (6b) of the bearing housing (6) is slightly shortened so that the inner diameter flange portion (6b) has a plurality of circumferentially equally spaced portions (three in FIG. 7b) to the claw portion (6c).
Are continuous in the inner diameter direction. In addition, a part of the outer diameter flange portion (5b) of the clutch housing 5 is bent inward,
Notches (5d) are formed by notching this bent portion in a window shape at a plurality of locations (three locations in FIG. 7b) at equal intervals around the circumference. The cutout (5d) is
As shown in FIG. 8, the outer diameter flange portion (5b) may be cut out from the outer diameter.

In the embodiment shown in FIGS. 4 to 6,
The configuration may be such that the annular member (7) in FIGS. 1 to 3 is provided.

In the embodiment shown in FIG. 9, in the structure shown in FIGS. 1 and 2, the annular member (7) is provided with an annular or partial protrusion (7c) protruding toward the inner diameter side.
The axial gap S2 is provided between the protrusion (7c) and the outer diameter flange portion (5b) of the clutch housing (5).

[0033]

As described above, the centering type roller clutch of the present invention is a roller clutch for regulating the rotation direction of a rotating shaft rotatably supported by a body frame via a rolling bearing. A bearing housing for accommodating the bearing is integrally formed with the main body frame, and the outer diameter flange portion of the clutch housing for accommodating the roller clutch and the inner diameter flange portion of the bearing housing are axially engaged with each other, and in the circumferential direction. The clutch housing is adjusted to the main body frame by distributively providing pawls and notches that are engaged with each other in the bearing housing and the clutch housing, and providing radial and axial gaps for allowing the clutch housing to float with respect to the bearing housing. Since it is attached as much as possible, compared to the case where it is fixed using bolts and nuts, the structure is Is iodinated, it becomes easy installation work.

Further, by interposing an annular member made of resin or rubber between the clutch housing and the bearing housing, shocks and vibrations which are likely to occur due to ON / OFF operation of the roller clutch are absorbed, and noise and noise are absorbed. This has the effect of suppressing the generation of abnormal noise.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment (FIG. A: a- in FIG.
It is a cross-section (a) and a front view (FIG. b: a view in the direction of arrow b in FIG. a).

FIG. 2 is an enlarged view of FIG. 1a.

FIG. 3 is a cross-sectional view (FIG. A: a-a cross section in FIG. B) and a front view (FIG. B: b direction arrow in FIG. A) showing another embodiment.

FIG. 4 is a cross-sectional view (FIG. A: a-a cross section in FIG. B) and a front view (FIG. B: b direction arrow in FIG. A) showing another embodiment.

FIG. 5 is a cross-sectional view (FIG. A: aa cross section in FIG. B) and a front view (FIG. B: arrow b direction in FIG. A) showing another embodiment.

FIG. 6 is a sectional view (FIG. A: aa cross section in FIG. B) and a front view (FIG. B: b direction arrow in FIG. A) showing another embodiment.

FIG. 7 is a front view showing a modified example of the embodiment shown in FIG.

FIG. 8 is a front view showing a modified example of the embodiment shown in FIG.

FIG. 9 is a partial cross-sectional view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating shaft 2 roller clutch 3 rolling bearing 4 body frame 5 clutch housing 5b outer diameter flange part 5d notch part 5d 'claw part 6 bearing housing 6c claw part 6c' notch part 7 annular member 7a recess 7b notch part S1 Radial clearance S2 Axial clearance

Claims (4)

[Claims] 1. A roller clutch for restricting a rotation direction of a rotary shaft rotatably supported by a body frame via a rolling bearing, wherein a bearing housing for accommodating the rolling bearing is integrally formed with the body frame. The outer diameter flange portion of the clutch housing accommodating the roller clutch and the inner diameter flange portion of the bearing housing are engaged in the axial direction,
Further, the clutch and the notch that engage with each other in the circumferential direction are distributively provided in the bearing housing and the clutch housing, and the radial and axial gaps are provided to allow the clutch housing to float with respect to the bearing housing. A centering roller clutch in which the housing is attached to the body frame so that it can be centered. 2. A roller clutch for restricting a rotation direction of a rotating shaft rotatably supported by a body frame via a rolling bearing, wherein a bearing housing for accommodating the rolling bearing is integrally formed with the body frame. A claw that axially engages the outer diameter flange portion of the clutch housing that accommodates the roller clutch and the inner diameter flange portion of the bearing housing via an annular member made of resin or rubber, and that engages with each other in the circumferential direction. The clutch housing is distributively provided in the bearing housing and the clutch housing, and the clutch housing is attached to the main body frame so that the clutch housing can be aligned by providing a radial and axial clearance for allowing the clutch housing to move with respect to the bearing housing. Aligning roller clutch. 3. A cylindrical portion fitted to the outer ring of the rolling bearing,
A bearing housing having an inner diameter flange portion formed at one end of the cylindrical portion, and claw portions formed at equal intervals in the circumferential direction of the inner diameter flange portion, a cylindrical portion that fits with the outer ring of the roller clutch, and other cylindrical portions. A clutch housing having an outer diameter flange portion formed at an end and notches formed at equal intervals in the circumferential direction of the outer diameter flange portion, and a claw portion of the bearing housing inserted into the cylindrical portion of the bearing housing. An aligning type roller clutch including a notch portion for receiving and an annular member made of resin or rubber having a recess for receiving the outer diameter flange portion of the clutch housing. 4. A cylindrical portion fitted to the outer ring of the rolling bearing,
A bearing housing having an inner diameter flange portion formed at one end of the cylindrical portion, notches formed at equal intervals in the circumferential direction of the inner diameter flange portion, a cylindrical portion that fits with the outer ring of the roller clutch, and a cylindrical portion An outer diameter flange portion formed at the other end, a clutch housing having claw portions formed at equal intervals in the circumferential direction of the outer diameter flange portion, and inserted into the cylindrical portion of the bearing housing,
An aligning roller clutch including a notch portion that engages with a claw portion of a clutch housing, and a resin or rubber annular member having a recess that receives an outer diameter flange portion of the clutch housing.