JPH05263844A - One-way clutch - Google Patents

Abstract

PURPOSE:To provide a one-way clutch which inhibits an oil feeding port provided on an inner race from reducing the torque transmission ability and hindering engagement. CONSTITUTION:An oil feeding port 10 penetrating an inner race 2 in the radial direction is provided. An opening 11 located in the radially external direction of the oil feeding port 10 is provided in the axially external direction of a sliding part for the inner race 2 and an end bearing 7. A bent part 12 covering the opening 11 of the oil feeding port 10 is provided for an end bearing cap 9.

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 used in, for example, an automatic transmission of an automobile.

[0002]

2. Description of the Related Art A conventional one-way clutch is shown in FIG.
As shown in (A), an outer ring 32, an inner ring 33, and a plurality of engaging members 34 arranged between the inner ring 33 and the outer ring 32.
A retainer 35 for holding each engagement member 34, a spring 36 for urging each engagement member 34 in one direction, a space between the inner ring 33 and the outer ring 32, and both sides of the engagement member 34. End bearings 37, 37 arranged on the outer ring 3 and
End bearing retainer 3 attached to both sides of 2
8 and 38, the inner ring 33 is provided with an oil supply hole 39, and the lubricating oil is supplied from the oil supply hole 39.

Further, as shown in FIG. 4B, the oil supply hole 39 is inclined with respect to the radial axis of the inner ring 33 due to layout restrictions such as an automatic transmission incorporating a one-way clutch. There is also.

In the one-way clutch shown in FIGS. 4A and 4B, the opening 40 on the radially outer side of the oil supply hole 39 is provided.
Is provided substantially axially in the center of the sliding surface between the engaging member 34 and the inner ring 33.

[0005]

However, in the conventional one-way clutch shown in FIGS. 4 (A) and 4 (B), the opening 40 of the oil supply hole 39 has the engagement member 34 and the inner ring 33. Since it is provided on the sliding surface, the inner ring 33 has an oil supply hole 39
Since the contact area between the engaging member 34 and the inner ring 33 is reduced by providing the above, there is a problem that the torque transmission capability of the one-way clutch is reduced.

Further, since the opening 40 forms the edge portion 33a on the sliding surface of the inner ring 33, stress concentration occurs on the edge portion 33a, and the inner ring 33 is easily plastically deformed or peeled off. The engagement member 34 also has a problem that peeling easily occurs. The deformation and peeling of the inner ring 33 and the peeling of the engaging member 34 cause poor meshing of the one-way clutch.

Further, as shown in FIG. 4 (B), when the slanted oil supply hole 39 is provided in the inner ring 33, as shown in FIG.
Since the thickness of the portion A of the inner ring 33 shown in (B) is locally thinned, the degree of deformation and peeling is particularly large.

Therefore, an object of the present invention is to provide a one-way clutch in which the oil supply hole provided in the inner ring does not cause a reduction in torque transmission capability or a poor meshing.

[0009]

In order to achieve the above object, the present invention provides an outer ring, an inner ring, a plurality of engaging members arranged between the inner ring and the outer ring, and each of the engaging members. A retainer for holding, a spring for urging each of the engaging members in one direction, end bearings arranged between the inner ring and the outer ring, and on both sides of the engaging member, and attached to both side surfaces of the outer ring. In a one-way clutch provided with an end bearing retainer, a lubrication hole penetrating the inner ring in the radial direction is provided, and an opening on the outer side in the radial direction of the lubrication hole is provided more than a sliding part between the inner ring and the end bearing. It is characterized in that it is provided on the outer side in the axial direction and a bent portion is provided on the end bearing retainer to cover the opening of the oil supply hole. Further, it is desirable that the end bearing be provided with a cutout portion that allows the oil supplied from the oil supply hole to pass therethrough.

[0010]

According to the above construction, the opening portion on the outer side in the radial direction of the oil supply hole is provided on the outer side in the axial direction than the sliding portion between the end bearing on the outer side in the axial direction of the engaging member and the inner ring. Therefore, unlike the conventional example, the contact area between the inner ring and the engaging member does not decrease due to the provision of the oil supply hole in the inner ring. Therefore, the torque transmission capability does not decrease due to the provision of the oil supply hole, and the torque can be transmitted satisfactorily.

Further, since the bent portion provided on the end bearing retainer covers the opening of the oil supply hole, it is possible to prevent the lubricating oil from leaking from the aperture to the outside of the end bearing retainer.

Further, since the opening on the radially outer side of the oil supply hole is provided on the axially outer side than the sliding portion between the end bearing axially outer than the engaging member and the inner ring, The opening does not form an edge on the sliding surface of the inner ring with respect to the engaging member. Therefore, the provision of the oil supply hole does not cause deformation or separation of the inner ring or the engaging member, and a smooth operation without a defective meshing is realized.

Further, when the end bearing is provided with a cutout portion that allows the oil supplied from the oil supply hole to pass therethrough, the oil can easily pass from the cutout portion to the inside of the end bearing. , The lubricity is improved.

[0014]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. As partially shown in FIG. 1, the one-way clutch of the above embodiment includes an outer ring 1, an inner ring 2, an engaging member 3, a retainer 4, a spring 5, a pair of end bearings 6 and 7, and a pair of end bearing retainers. It is basically composed of 8 and 9.

FIGS. 2A and 2B are a front view showing the one-way clutch and a sectional view taken along the line AA in the front view of the one-way clutch. 3A is a front view of the end bearing 7, and FIG. 3B is a sectional view of the end bearing 7 taken along the line AA in FIG. 3A.

As shown in FIGS. 1 and 2, a convex portion 1a and a concave portion 1b are formed on the outer peripheral surface of the outer ring 1 so as to be spline-fitted into a housing (not shown). At a central position between the inner ring 2 and the outer ring 1, a plurality of engaging members 3, a retainer 4 holding each of the engaging members 3, and each engaging member 3 are urged in one direction. A spring 5 is arranged, and end bearings 6, 7 having a U-shaped cross section are arranged at both side positions between the inner ring 2 and the outer ring 1.

As shown in FIG. 1, the one-way clutch is provided with an oil supply hole 10 which penetrates the inner ring 2 in the radial direction, and an opening 11 on the outer side of the oil supply hole 10 in the radial direction.
It is provided axially outside the sliding portion between the inner ring 2 and the end bearing 7.

Further, on both side surfaces of the outer ring 1, the corrugated mounting portions 8a, 8a which engage with the mounting grooves 1c, 1d of the outer ring 1, respectively.
End bearing retainers 8, 9 having 9a are mounted. The end bearing retainer 9 is provided with a bent portion 12 that covers the opening 11 of the oil supply hole 10. The bent portion 12 extends from the outer side in the radial direction toward the inner side in the radial direction in an eaves-like shape outward in the axial direction.

Further, as shown in FIGS. 1 and 3, the inner peripheral edge of the end bearing 7 is provided with a notch portion 7a which allows oil supplied from an oil supply hole 10 provided in the inner ring 2 to pass therethrough. It is provided at eight locations at substantially equal intervals in the direction. The actions of the engaging member 3, the retainer 4, the spring 5, and the end bearings 6 and 7 are well known and have no direct relation to the present invention, so a detailed description thereof will be omitted.

According to the above configuration, the opening 11 on the radially outer side of the oil supply hole 10 is axially outer than the sliding portion between the end bearing 7 and the inner ring 2 axially outer than the engaging member 3. Therefore, unlike the conventional example, the contact area between the inner ring 2 and the engaging member 3 does not decrease due to the provision of the oil supply hole 10 in the inner ring 2. Therefore, the torque transmission capability does not decrease due to the provision of the oil supply hole 10, and the torque can be transmitted satisfactorily.

Further, since the bent portion 12 provided on the end bearing retainer 9 covers the opening 11 of the oil supply hole 10, the lubricating oil is prevented from leaking out of the end bearing retainer 9 through the opening 11. it can.

The opening 11 on the radially outer side of the oil supply hole 10 is provided axially outside the sliding portion between the end bearing 7 axially outside the engaging member 3 and the inner ring 2. Therefore, the opening 11 does not form an edge on the sliding surface of the inner ring 2 with respect to the engaging member 3. Therefore, the provision of the oil supply hole 10 does not cause the inner ring 2 and the engaging member 3 to be deformed or separated, and a smooth operation without a defective meshing can be realized.

Further, a cutout portion 7a for allowing the oil supplied from the oil supply hole 10 to pass through the end bearing 7.
Since the oil is provided, the oil can easily pass from the cutout portion 7a to the inside of the end bearing 7. Therefore, lubricity can be improved.

Further, since the bent portion 12 is in the shape of an eave that expands outward in the axial direction, the oil supplied from the oil supply hole 10 is fed along the bent portion 12 to the end bearing 7
Can be effectively guided to the notch 7a.

Further, in the above embodiment, the oil supply hole 10 is formed parallel to the radial axis of the inner ring 2. However, the oil supply hole 10 of FIG. As shown by the broken line, the inner ring 2 may be provided with an oil supply hole 100 that is inclined with respect to the radial axis of the inner ring 2.

[0026]

As is apparent from the above description, the one-way clutch of the present invention is provided with the oil supply hole penetrating the inner ring in the radial direction, and the opening on the outer side in the radial direction of the oil supply hole is provided with the inner ring and the inner ring. The end bearing retainer is provided with a bent portion that is axially outside the sliding portion with the end bearing and that covers the opening of the oil supply hole. Therefore, according to the present invention, unlike the conventional example in which the opening portion of the oil supply hole provided in the inner ring is present in the sliding portion between the inner ring and the engaging member,
Since the oil supply hole of the inner ring does not reduce the contact area between the inner ring and the engaging member and does not reduce the torque transmission capability, good torque transmission capability can be maintained.

Further, since the bent portion provided on the end bearing retainer covers the opening of the oil supply hole, it is possible to prevent the lubricating oil from leaking out of the end bearing retainer from the opening.

Further, since the opening on the radially outer side of the oil supply hole is provided on the axially outer side than the sliding portion between the end bearing axially outer than the engaging member and the inner ring, The opening does not form an edge on the sliding surface of the inner ring with respect to the engaging member. Therefore, the provision of the oil supply hole does not cause deformation or separation of the inner ring or the engaging member, and a smooth operation without a defective meshing can be realized.

When the end bearing is provided with a cutout portion for allowing the oil supplied from the oil supply hole to pass therethrough, the oil can easily pass from the cutout portion to the inside of the end bearing. Lubricity can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts of an embodiment of a one-way clutch of the present invention.

FIG. 2 is a diagram including a front view and a cross-sectional view of the above embodiment.

FIG. 3 is a view including a front view and a cross-sectional view of an end bearing of the above embodiment.

FIG. 4 is a sectional view of a main part of a conventional one-way clutch.

[Explanation of symbols]

1 Outer ring 1a Convex part 1b Recessed part 1c, 1d Mounting groove 2 Inner ring 3 Engaging member 4 Retainer 5 Spring 6,7 End bearing 7a Cutout part 8,9 End bearing retainer 8a, 9a Corrugated mounting part 10,100 Oil supply hole 11 Opening 12 Bent

Claims (2)

[Claims] 1. An outer ring, an inner ring, a plurality of engagement members arranged between the inner ring and the outer ring, a retainer for holding each of the engagement members, and each of the engagement members in one direction. A one-way clutch including a biasing spring, end bearings arranged between the inner ring and the outer ring and on both sides of the engaging member, and end bearing retainers attached to both side faces of the outer ring, wherein the inner ring is A lubrication hole penetrating in the radial direction is provided, and an opening on the outer side in the radial direction of the lubrication hole is provided axially outside of the sliding portion between the inner ring and the end bearing, and the lubrication hole is provided in the end bearing retainer. A one-way clutch, characterized in that a bent portion is provided to cover the above opening. 2. A one-way clutch, wherein the end bearing is provided with a cutout portion that allows the oil supplied from the oil supply hole to pass therethrough.