One-way clutch

Abstract

The present invention relates to a unidirectional cultch, which may be easily minimized and may reduce manufacture cost of shells. The unidirectional cultch allows a shaft rotating relatively to a shell body in only one direction, thus limits rotation in another direction, wherein, in one aspect, a rolling component on inner surface of the shaft hole holds width of an opening of a space larger than external diameter of the rolling component, in the other aspect, a holding component is integrally arranged on a spring component to make it front end face the opening of the holding space of the rolling component and hold the rolling component, in state of using spring force of the spring component to side-push the rolling component to a narrow width section, the distance from the front end of the holding component to the opening edge of the holding space of the rolling component at narrow width section side is less than the external diameter of the rolling component, and is larger than the distance from the contact point of the rolling component and the shaft to the opening edge of the narrow width section side.

Description

technical field [0001] The invention relates to a one-way clutch, the structure of which allows the shaft inserted into the housing and the housing to rotate relative to each other in only one direction. Background technique [0002] At present, there is a one-way clutch in which the casing and the shaft can rotate relative to each other in a state where the shaft is installed in the casing, and only one direction of relative rotation is allowed. For example, the one-way clutch described in Patent Document 1 is known. [0003] Figure 9 with Figure 10 It is a cross-sectional view of the conventional one-way clutch, showing a state in which a shaft 3 is inserted into a shaft hole 2 formed in a housing 1 . [0004] The one-way clutch has a plurality of needle roller holding spaces 4 formed along the outer periphery of the shaft hole 2 of the housing 1 . The needle roller holding space 4 is constituted by a needle roller holding portion 4 a holding the needle roller 5 and a ...

AI Technical Summary

Problems solved by technology

However, in recent years, especially with the miniaturization of various devices, the one-way clutch is also required to be ultra-small, but it is very difficult to correctly manage the opening width of the opening 7 of the housing 1. Such size management Causes an increase in the manufacturing cost of the one-way clutch

[0023] In addition, as described above, since the thickness of the opening side 7b on the side of the thin wide portion 4e must be adjusted, for example, when molding the housing 1 with a mold, it is difficult for the material flowing into the mold to reach the front end of the opening side 7b.

In particular, if sintered metal is used for the housing 1, it is more difficult for the material to reach the opening edge 7b due to the poor fluidity of the material.

In conclusion, if the material cannot reach said opening edge 7b, the size of the opening 7 cannot be correct.

If the size of the opening 7 cannot be correct, the yield of the product will be reduced, resulting in an increase in manufacturing cost

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