JPS6111541Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a one-way bearing.

In one-way bearings, a large number of rollers or balls and springs are assembled into a retaining ring, which must be assembled between the inner and outer rings together with a restraining member to prevent parts from falling out, which requires a large number of assembly steps and is extremely difficult to assemble. This becomes a tedious task. For example, Utsukai 54-
The same applies to those disclosed in No. 69259 or Japanese Utility Model Application Publication No. 55-9973. In the former case, in addition to the roller retaining ring, it is necessary to provide two restraining rings called bearing rings in front and behind the roller retaining ring. This gives rise to another problem. For example, the retaining ring and outer ring of the bearing ring are constructed separately, which creates the problem of requiring machining precision to match the axis of the roller group, but products that meet these requirements and require the laborious assembly described above are expensive. I have no choice but to become The above also applies to the latter.

The present invention was devised in view of the above problems, and its purpose is to provide a one-way bearing that is extremely easy to assemble, rotates in one direction accurately, is inexpensive, and has good rolling and stopping characteristics. There is a particular thing.

The present invention that satisfies the above objects will be described in detail based on illustrated embodiments.

A cylindrical outer cylinder 1 forming a casing of a one-way bearing and a fitting member 2 fitted into the open end of the outer cylinder 1 are formed to have a male and female fitting structure,
Each has a through hole 1a, 2a for the shaft 15 at its center, and has a brim-like flange 1b, 2b on the outer periphery of the outer end.
An intermediate ring 5 is fitted into the inner surface of the outer cylindrical body 1, and the intermediate ring 5 has a polygonal shape formed on the inside. The fitting member 2 is fitted with a polygonal frame portion 7 integrally protruding from the inner end of the fitting member 2 so as to have an outer shape complementary to the inner surface 6. Gaps 8 are provided in the polygonal frame 7 at required intervals in the circumferential direction, into which a plurality of rollers 9 are loosely inserted.
A notch 10 facing the gap 8 of the polygonal frame portion 7 is provided, and a roller pressing spring 11 is fitted therein. Therefore, simply incorporating the rollers 9 and the like into the fitting member 2 serves as a bearing. 12 is the open end flange portion 1 of the outer cylinder body 1
A locking pawl serving as a main engagement stage protruding from part b enters the locking hole 13 of the fitting member 2 and locks the end face, thereby fixing the fitting member 2. In order to perform this action smoothly,
The locking pawl 12 has notches 14, 14' formed in the outer cylinder 1 to maintain elasticity.

In the above configuration, when the shaft 15 rotates clockwise in FIG. 4, the roller 9 installed in the intermediate ring 5 moves relatively to the right. Therefore, the middle ring 5
A gap is created between the inclined polygonal inner surface 6 of the inner surface and the shaft 15 that contacts via the roller 9, and the intermediate ring 5
is in a free state with respect to the shaft 15. Note that this is the same as when the outer cylinder 1 rotates in the direction of the solid line in FIG. 4 and the shaft 15 stops.

On the other hand, when the shaft 15 attempts to rotate counterclockwise in the figure, there is a roller 9 pressed in advance by the spring 11 between the polygonal inner surface 6 and the shaft 15.
The intermediate ring 5 and the shaft 15 are in contact with each other via the roller 9, so that the roller 9 does not rotate and there is no relative movement between the intermediate ring 5 and the shaft 15. That is, the outer cylinder 1 rotates in the direction of the chain arrow in the figure.

As described above, the present invention has a so-called female-male fitting structure in which the fitting member 2 is fitted into the outer cylinder 1, a polygonal frame portion 7 provided with a notch 10 in which the roller 9 and the spring 11 are housed, and Since the intermediate ring 5 is arranged, the roller 9 and the spring 11 can be temporarily assembled stably at a stage before the outer cylinder body 1 is assembled to the fitting member 2 during assembly, making the assembly operation very easy and efficient. This method significantly reduces assembly costs and does not require excessive precision unlike conventional methods. In addition, since the outer cylindrical body 1 only needs to be fitted into the mating member 2, the outer cylindrical body 1 can be formed into any shape according to the customer's order.
There is no need to adopt a manufacturing method in which separate parts are newly attached, which contributes to cost reduction, and since the parts other than the outer cylinder 1 are common, mass production and storage are possible, resulting in versatility. Therefore, according to the present invention, it is easy to assemble without going through complicated steps, and since the fitting member 2 and the plurality of rollers 9 are integrally assembled, the centering with respect to the shaft 15 is always performed accurately. Further, since the outer cylinder body 1 and the fitting member 2 are integrated by the engagement means, they can be easily disassembled afterwards, which is extremely convenient in terms of parts replacement and maintenance.

[Brief explanation of the drawing]

The drawings show an embodiment of the one-way bearing according to the present invention, in which Fig. 1 is a longitudinal side view, Fig. 2 is a longitudinal front view, Fig. 3 is an exploded perspective view, and Fig. 4 is a main part. The front view and FIG. 5 are vertical cross-sectional views. 1...Outer cylinder body, 2...Fitting member, 3...Protrusion,
4... Concavity, 5... Intermediate ring, 6... Polygonal inner surface,
7... Polygonal frame portion, 8... Gap, 9... Roller,
10...notch, 11...roller pressure spring, 12,1
3... Engagement means.

Claims (1)

[Scope of utility model registration request] A cylindrical outer barrel 1, a fitting member 2 that fits into the open end of the outer barrel 1, and recesses 4 that fit the protrusions 3 formed at several locations on the inner surface of the outer barrel 1 are provided on the circumferential surface. an intermediate ring 5, a polygonal frame part 7 integrated with the fitting member 2 that fits the polygonal inner surface 6 of the intermediate ring 5, and a polygonal frame part 7 formed at a plurality of locations at required intervals. a plurality of rollers 9, each of which is loosely inserted into the gap 8;
Notch 1 provided facing gap 8 of polygonal frame 7
This one-way bearing consists of a roller pressing spring 11 that fits into the outer cylindrical body 1 and the fitting member 2 fixed by engagement means 12 and 13.