One-way clutch

a one-way clutch and coil spring technology, applied in the field of one-way clutches, can solve the problems of low frequency of angular velocity variation of the vehicle engine at low engine speed, high frequency of angular velocity variation of the vehicle engine, and inability to provide a proper torque transmission

Inactive Publication Date: 2001-10-18
BANDO CHEM IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the delay angle is too large, excellent response to an angular velocity variation cannot be attained and therefore proper torque transmission cannot be provided.
Further, the frequency of angular velocity variations of the vehicle engine is low at low engine speeds and high at high engine speeds.
However, the conventional one-way clutch using the coil springs f as the spring members generally has the disadvantage of a lower spring constant of the coil spring f as compared with the flat spring e of equal size in its operating direction.
This causes a new problem of the difficulty in disposing the one-way clutch in an engine room of the vehicle.
Further, the conventional one-way clutch using the coil springs f has another problem.
Furthermore, since the rotation of the coil spring f itself around the axis of the coil also concurs, these events results in easily providing an unstable pressing force on the intermediate member c. This also invites insufficient suppression of the above-mentioned vibrations of the intermediate member c.
In this case, since the wire end forming the other end of the coil spring does not contact with the inner and outer rings, there can be obviated the occurrence of events due to engagement of the wire end with the inner and outer rings, i.e., an event that the operation of the coil spring is blocked or an event that the contact surfaces of the inner and outer rings with the intermediate member are damaged to adversely affect the position change of the intermediate member.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0070] Next, when the one-way clutch-integrated pulley A of the above embodiment is used as an inventive example, an experiment carried out for examining the delay angle thereof will be described.

[0071] Specifically, as schematically shown in FIG. 7, a V-ribbed belt 23 was trained between a drive pulley 31 of a V-ribbed pulley and the one-way clutch-integrated pulley A, and in this arrangement the drive pulley 31 was driven into rotation so that the one-way clutch-integrated pulley A could input torque with a target speed of 12500 rpm, a rate of variation of revolution of 3% and a frequency of variations of 100 to 200 Hz. At the time, the speeds of the outer and inner rings were measured. Then, the mean value of delay angles was calculated based on the measured data. The above speed and conditions of variation of revolution conform to angular velocity variations of torque input to the one-way clutch-integrated pulley A when the speed is 3000 to 6000 rpm in the four-cycle four-cylind...

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Abstract

A one-way clutch is arranged so that a plurality of intermediate members, which are each retained in a cage, each wedge between inner and outer rings when the inner and outer rings relatively rotate in a locking direction and each rock opposite to the direction of the wedging when the inner and outer rings relatively rotate in an idling direction, are pressed in the direction of the wedging by spring members. In this one-way clutch, each spring member includes a pair of coil springs that are juxtaposed to align in an axial direction of the inner and outer rings, are retained at one ends thereof by the cage and resiliently contact at the other ends thereof with the intermediate member. The one ends of both the coil springs are connected together through a connecting portion. The coil springs and the connecting portion are formed of a single wire.

Description

[0001] This invention relates to a one-way clutch that effects and blocks torque transmission between inner and outer rings by shifting intermediate members according to the direction of relative rotation between the inner and outer rings, and particularly relates to improvement of a spring member for pressing and urging each of the intermediate members into the shift in a direction to wedge between the inner and outer rings.DESCRIPTION OF THE PRIOR ART[0002] As for example disclosed in Japanese Unexamined Patent Publication No. 61-228153, it is known that in a belt type auxiliary equipment driving apparatus for a vehicle engine, a one-way clutch is disposed, in order to transmit torque of a crank shaft revolving with angular velocity variations due to an explosion stroke of the engine to input shafts of auxiliary equipment through a belt, in a torque transmission path so that for a period of increase in angular velocity during the angular velocity variations torque transmission is ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F16D41/067F02B63/04F16D41/07F16H7/02
CPCF16D41/067F16D41/07F16D2041/0605
InventorNAGAYA, SHUICHIDOMOTO, MASAKAZUTOKUDA, MAKOTO
OwnerBANDO CHEM IND LTD