JP3553682B2 - Lubrication mechanism for one-way clutch - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubrication mechanism for a one-way clutch used as a component such as a torque transmission and a back stop in a drive device of an automobile.
[0002]
[Prior art]
FIG. 3 shows a standard mechanism of the one-way clutch. In the drawing, 10 is an inner ring, 20 is an outer ring, 30 is a one-way clutch, 40 and 45 are left and right end bearings, 50 is a lubricating oil hole, 60 is a holding plate, and 70 is a sprag as torque transmitting means. (Since the one-way clutch is a well-known technique, a detailed description is omitted.)
[0003]
As shown by the arrow R, the lubricating oil flows into the one-way clutch, stays inside, and is discharged from the inner peripheral surfaces of the left and right end bearings.
[0004]
Thus, when two end bearings are used on the left and right, sufficient lubricating oil can be secured inside the one-way clutch, and an ideal lubrication state is achieved for the sprags and the end bearings.
However, only one end bearing as a radial bearing for supporting the outer and inner rings may be used depending on the use conditions (load, mounting, lubrication state, etc.) in the drive device. It may not be used when supported by other radial bearings.
[0005]
As described above, the cost may be reduced by reducing the number of end bearings depending on the use conditions.
[0006]
【task to solve】
Therefore, as shown in FIG. 4, when one of the end bearings is omitted, the lubricating oil introduced into the one-way clutch 30 as shown by the arrow R does not stay inside the one-way clutch, and the lubricating oil is held down as shown by the arrow F. Since the fluid flows out from below the plate 60, the disadvantage of insufficient lubrication in the one-way clutch is unavoidable.
[0007]
In order to solve the above drawbacks, it is conceivable to reduce the inner diameter of the holding plate 60 as shown in FIG. 5 to prevent the lubricating oil from flowing out. In this case, the minimum clearance of the end bearing is set to B (calculated from the intersection of dimensions). In this case, if the tolerance of the inner peripheral end of the presser plate is set to A 'and A' = B, the presser plate itself does not have a bearing ability, so that contact with the outer periphery of the inner ring causes a problem such as seizure.
[0008]
[Means to be solved]
In order to solve the above-mentioned problem, the present invention provides a lubrication mechanism for a one-way clutch in which an end bearing is mounted on one side and a pressing plate is mounted on the opposite side. It extends to the outer peripheral surface, and the clearance between the inner peripheral end of the presser plate and the inner peripheral surface is determined from the amount of movement when the device portion including the one-way clutch leans toward the presser plate. A one-way clutch lubrication mechanism is obtained.
[0009]
[Action]
In the one-way clutch of the present invention, in a normal state, the clearance between the inner peripheral end of the presser plate and the outer peripheral surface of the inner ring is larger than a certain level, so there is no fear that the presser plate is seized. The clearance between the inner peripheral end of the presser plate and the inner peripheral surface is reduced to zero or only a small amount such as the normal clearance between the end bearing and the inner peripheral surface of the internal transfer only when the equipment part including the device is tilted toward the presser plate. Therefore, the clearance is determined from the amount of movement when the device is tilted, so that the holding plate does not seize and the amount of lubricating oil flowing out can always be minimized.
[0010]
【Example】
FIG. 1 is a side sectional view of a one-way clutch according to the present invention, and FIG. 2 is a drawing for explaining the lubricating action of the one-way clutch of the present invention in a dynamic state. The same reference numerals as in FIG. 3 represent the same parts.
[0011]
As shown in FIG. 2, the clearance A ′ between the inner peripheral end 61 of the holding plate 60 and the outer peripheral surface of the inner ring 10 when the device portion including the one-way clutch such as the one-way clutch 30 and the outer ring 20 is inclined toward the holding plate 60. The clearance A between the inner peripheral end 61 of the presser plate 60 and the outer peripheral surface of the inner ring is adjusted so that the clearance A becomes 0 or the normal clearance B of the end bearing (see FIG. 5). By optimizing the amount, it is possible to minimize the outflow of lubricating oil from inside the one-way clutch while preventing the presser plate from burning.
[0012]
【effect】
The lubrication mechanism of the one-way clutch of the present invention has the above-described structure, minimizes the flow of the lubricating oil from the one-way clutch while preventing seizure of the presser plate, and maintains the lubrication state as in the related art. It was possible to reduce the cost of the one-way clutch.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an embodiment of the present invention. FIG. 2 is an explanatory view in the same dynamic state. FIG. 3 is a side sectional view showing a conventional one-way clutch. FIG. 4 is provided with an end bearing only on one side. FIG. 5 shows an example in which the holding plate is improved.
Reference Signs List 10 inner ring 20 outer ring 30 one-way clutch 40 end bearing 45 end bearing 50 lubricating oil hole 70 sprag

Claims (1)

In a one-way clutch lubrication mechanism in which an end bearing is mounted on one side and a presser plate is mounted on the opposite side,
The inner peripheral end of the presser plate extends to the outer peripheral surface of the inner ring, and the clearance between the inner peripheral end of the presser plate and the outer peripheral surface of the inner ring is determined from the amount of movement when the device portion including the one-way clutch is inclined toward the presser plate. A one-way clutch lubrication mechanism.

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