JPH0293110A - Retaining ring - Google Patents

Abstract

PURPOSE:To eliminate a clearance between an external or internal retaining ring and a fitting groove by providing an annular projection with a sectional shape in contact with a fitting groove near the outer periphery of the side wall of the groove and with a fitting guide surface. CONSTITUTION:An external retaining ring A is so constructed that a ring body with internal surfaces 2 fitted closely onto the fitting groove 1 of a shaft S and both side surfaces 3 and 4 perpendicular roughly to these internal surfaces 2 is provided with a notch 5 at a circular position of the body and an annular projection 8 on one side surface 3 with a sectional shape in contact with the fitting groove 1 near the outer periphery of the side wall of the groove 1 and with a fitting guide surface 8a. The seat for a press tool is provided on the outer surface of the retaining ring at the opposite side of the notch 5 to facilitate the fitting of the retaining ring. Thus a clearance between the retaining ring and the fitting groove can be eliminated and the rattling or tilting of the retaining ring can be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention prevents a mounted part fitted onto a shaft or a mounted part fitted into a hole from moving in the axial direction or falling off. This relates to a retaining ring for a shaft or hole that prevents damage.

[Conventional technology]

Regarding retaining rings for shafts or retaining rings for holes, JIS
Standards have been established, and JIS standard products are generally used.

FIG. 20 shows that a J
FIG. 3 is a partially cutaway front view showing a state in which an E-type retaining ring C for a shaft established by the IS standard is inserted from the side surface of a shaft S.

The retaining ring C is provided with a notch at one location in the circumferential direction, and this notch is pressed against the insertion groove 1 to enlarge the width of the notch, and the inner peripheral surface 2 is fitted into the insertion groove 1.

In order for the retaining ring C to fit into the insertion groove 1, the thickness t of the retaining ring C must be smaller than the width T of the insertion groove 1, but the difference between the two dimensions (T-t) is This creates a play between the insertion groove 1 and the retaining ring C, which causes the retaining ring C to wobble in the axial direction, so it is desirable to make it as small as possible.

For this reason, dimensional tolerances are provided for dimensions T and t, respectively, and the amount of play is limited.

[Problem to be solved by the invention]

When the retaining ring C manufactured within the dimensional tolerance is fitted into the insertion groove 1 manufactured within the dimensional tolerance, the actual M gap will be approximately Q, ] as for an 8φ bearing, and the There is a risk that the retaining ring C used to prevent axial movement may wobble with a width of approximately 0.1 m1.

If the clearance is made smaller than this, there will be the disadvantage that the manufacturing cost of the parts will be high and that it will be difficult to fit the retaining ring C into the insertion groove.

This problem occurs not only in retaining rings for shafts but also in retaining rings for holes.

The present invention has been made to solve these problems, and provides a retaining ring that eliminates the play between the retaining ring and the insertion groove and can be easily attached to the insertion groove.

[Means to solve the problem]

In order to achieve the above purpose, in the retaining ring for the shaft,
A ring-shaped body having an inner circumferential surface to be fitted into the insertion groove of the shaft and both side surfaces substantially perpendicular to the inner circumferential surface is provided with a notch for cutting at one point of the ring-shaped body, and at least one of both sides is An annular protrusion is provided on one side surface of the insertion groove and has a cross-sectional shape that is in contact with near the outer peripheral edge of the side wall of the insertion groove and has an insertion guide surface.

Instead of this annular protrusion, a number of protrusions that are in contact with near the outer peripheral edge of the side wall of the insertion groove and have the same cross-sectional shape may be provided on the side surface.

Among retaining rings for shafts, those corresponding to E-type retaining rings have the advantage that the retaining ring can be easily attached by carving a receiving surface for a pressing tool on the outer peripheral surface on the opposite side of the notch.

The receiving surface of this pressing tool is not limited to a retaining ring having an annular protrusion or a large number of protrusions, but can also be provided to a retaining ring having no annular protrusion or a large number of protrusions.

In a retaining ring for a hole, a ring-shaped body having an outer circumferential surface fitted into an insertion groove of the hole and both side surfaces substantially perpendicular to the outer circumferential surface is provided with a notch for cutting at one point of the ring-shaped body, An annular protrusion is provided on at least one of the two side surfaces and has a cross-sectional shape that contacts near the inner peripheral edge of the side wall of the insertion groove and has an insertion guide surface.

Instead of this annular protrusion, a number of protrusions that are in contact with near the inner peripheral edge of the side wall of the insertion groove and have the same cross-sectional shape may be provided on the side surface.

[For production]

When fitting the retaining ring into the insertion groove, the annular protrusion or multiple protrusions provided on one side or both sides of the retaining ring contact both sides of the insertion groove; Since a guide surface is provided, it is elastically compressed and fits into the insertion groove.

Even after the retaining ring is inserted into the insertion groove, the annular projection or multiple projections elastically press and contact the side wall of the insertion groove, so that the retaining ring does not wobble.

Further, since the annular projection or the plurality of projections are provided near the periphery of the side wall, they have the effect of preventing the retaining ring from tilting.

When inserting a retaining ring into an insertion groove, insertion pressure is required because the annular projection or multiple projections are elastically compressed, but with E-type retaining rings for shafts, it is easier to insert by pressing a tool against the receiving surface. becomes.

This receiving surface can also be applied to an E-type retaining ring for shafts that does not have an annular projection or multiple projections.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a retaining ring A for a shaft corresponding to the E type, and FIG. 2 is a longitudinal sectional view of the retaining ring A fitted into an insertion groove 1 provided around the shaft S.

In the figure, the shaft S has a diameter d and an insertion groove 1 having a diameter d2 is provided on the outer peripheral surface thereof.

The retaining ring A is a ring-shaped body having an inner circumferential surface 2 with an inner diameter slightly smaller than the dimension d2, and side surfaces 3 and 4 that are substantially perpendicular to the inner circumferential surface 2. A notch 5 having a width d3 is provided.

This width dimension d3 is smaller than the diameter dimension d2 of the insertion groove 1, but since the retaining ring A is made of an elastic material, the notch 5 can be pressed against the insertion groove I to keep the notch 5 within the elastic limit. When expanded, the inner circumferential surface 2 can be fitted into the insertion groove 1 by making the middle dimension d of the notch 5 larger than the diameter dimension d2 of the insertion groove 1.

In order to facilitate the expansion of the notch 5, two recesses 6 are provided on the inner circumferential surface 2 of the retaining ring A.

In addition, in order to make it easier to press the retaining ring A into the insertion groove 1, a concave receiving surface 7 for pressing the tool is provided on the outer peripheral surface on the opposite side of the notch 5.
is engraved.

The reason why the receiving surface 7 is made concave is to prevent the tip of the pressing tool from escaping laterally, but if the tip of the tool is flat, the shape of the receiving surface 7 may be made flat instead of concave. do not have.

However, when the receiving surface 7 is formed into a concave shape, there is an advantage that the receiving surface 7 has a greater effect of promoting elastic deformation to the retaining ring, similar to the recessed portion 6.

As shown in FIG. 2 and FIG. 3, which is a partially enlarged view of FIG. 2, an annular projection 8 having a slightly smaller diameter than the outer peripheral surface diameter d1 of the shaft S is provided around the side surface 3.

The cross-sectional shape of the annular protrusion 8 is a protrusion having insertion guide surfaces 8a, 8a formed as sloped surfaces on both sides, and when the retaining ring A is inserted into the insertion groove 1, the corner of the insertion groove I is inserted. The retaining ring A is smoothly inserted into the insertion groove 1 while the annular projection 8 is elastically compressed when it hits the guide surface 8a.

The height of the annular projection 8 is determined such that the dimension from the end surface of the side surface 4 to the tip of the annular projection 8 is slightly larger than the maximum dimension within the tolerance of the medium dimension T of the insertion groove 1.

To attach the retaining ring A configured as described above to the insertion groove 1, place the end face of the notch 5 of the retaining ring A against the insertion groove 1, and press a tool against the receiving surface 7. expands and the inner peripheral surface fits into the insertion groove I.

When the retaining ring A is inserted into the insertion groove 1, a force that compresses the annular projection 8 acts on the insertion guide surface 8a that hits the corner of the insertion groove 1, the annular projection 8 is elastically compressed, and the retaining ring A is inserted. Groove 1
is fitted into the

Since the retaining ring A fitted into the insertion groove 1 is in pressure contact with the side wall of the insertion groove 1, the retaining ring A is snugly fitted into the insertion groove 1 without any play.

Therefore, the retaining ring A prevents the attached part P from moving without rattling.

In the above description, the annular projection 8 is provided on the side surface 3, but it may be provided on the side surface 4 instead of the side surface 3.

FIG. 4 is a longitudinal cross-sectional view of the retaining ring A1 and the shaft S, in which the annular projections 8 are provided on the side surfaces 3 and 4. FIG.

In such a case, elastic deformation occurs in the annular protrusions 8 provided on the side surfaces 3 and 4, so there is an advantage that the amount of elastic deformation occurring in each annular protrusion 8 is halved.

When the retaining ring A or A provided with the annular protrusion 8 is inserted into the insertion groove 1, the annular protrusion 8 is elastically compressed, so the insertion resistance increases slightly compared to a conventional retaining ring, but the tool The retaining ring A or A1 can be easily inserted by pressing the receiving surface 7.

As shown in FIGS. 5 and 6, this receiving surface 7 can also be provided on a conventional E-type retaining ring C without an annular protrusion 8, and the retaining ring C is pressed into the insertion groove 1 to be installed. At the same time, this has the effect of making it easier to press with a tool and making it easier to elastically deform the retaining ring C.

FIG. 7 is a front view of a retaining ring A2 showing a modification of the retaining ring A.

The retaining ring A2 is an E-shaped retaining ring in which two female holes 9 are provided near the cutout portion 5 instead of the cutout portion 6.
It is characterized by a large deformation in the vicinity of .

FIG. 8 is a front view of a retaining ring A3 showing another modification, which is an E-shaped retaining ring in which a T-shaped recess 10 is provided on the opposite side of the notch 5 instead of the recess 6. .

Both retaining rings Az and A3 have hollow parts 9 and 1 on the inner peripheral surface 2.
0 was provided to facilitate the expansion of the cutout 5, but if the retaining ring is made of a material with high elasticity, no cutout should be provided on the inner circumferential surface 2, as shown in FIG. , a retaining ring A4 that uses only the receiving surface 7 to be elastically deformed may be used.

In any of the retaining rings A2, A3, and Aa, the annular protrusion 8 is provided on one or both of the side surfaces 3 or 4, as in the case of the retaining ring A or A.

FIG. 10 is a vertical sectional view showing a modification of the cross-sectional shape of the retaining ring A5, and shows a retaining ring A5 in which the outer diameter of the side surface 4 on the side of the attached part P attached to the shaft S is increased.

The retaining ring A5 is used when the outer diameter of the attached part P is large and the attached part P must be received by a wide pressure receiving surface.

FIG. 11 is a longitudinal cross-sectional view showing another modified example, in which the retaining ring A6 has a large diameter and thick retaining ring with a recess 11 on its side surface 3.
shows.

This recessed portion 11 is provided to prevent scratches peculiar to plastic materials that occur during the manufacturing process when the retaining ring is made of a plastic material such as polyacecool resin.

FIG. 12 is a longitudinal cross-sectional view showing a further modified example, in which the side surface 3
A retaining ring A7 is shown in which a protruding portion 12 protruding from the side surface 3 is provided on the outer peripheral edge of the retaining ring A7.

The retaining ring A is inserted into the insertion groove 1 by pressing the outer peripheral surface of the retaining ring A.
When fitting the product into the product, the wider the width of the outer circumferential surface, the easier it is to perform manual or tool work.

The cross-sectional shapes of the retaining rings As, A6 and A described above are as follows:
Not only the E-type retaining ring but also the C-type retaining ring described later can be used in the same manner.

FIG. 13 shows a C-shaped retaining ring As for the shaft that is fitted from the end of the shaft S.

The retaining ring A8 is provided with a notch 13 narrower in width than the notch 5, and protrusions 14 for tool hooks protruding from the outer peripheral surface are provided on both sides of the notch 13, and between the two protrusions 14. A recess 15 for receiving a tool, which is wider than the notch 13, is formed.

Similar to the retaining ring A, the annular projection 8 is provided on either or both of the side surfaces 3 and 4.

To install the retaining ring All in the insertion groove 1, insert a tool with an enlarged tip into the recess 15 of the retaining ring As, open the tip of the tool, and adjust the inner diameter of the inner peripheral surface 2 of the retaining ring A8 to the shaft S. It is enlarged to a size larger than the diameter of the outer circumferential surface, and the retaining ring A8 is inserted from the end of the shaft S to fit into the insertion groove 1.

FIG. 14 is a front view showing a modification of the annular protrusion 8 of the retaining ring A, and shows a retaining ring B in which the annular protrusion 8 is continuous along an arc and the protrusions 16 are arranged intermittently.

A large number of protrusions 16 are arranged on a circumference with a slightly smaller diameter than the outer peripheral surface of the shaft S, and when the retaining ring B is inserted into the insertion groove 1 of the shaft S, the projections 16 are arranged near the outer peripheral edge of the side wall of the insertion groove 1. The protrusion 16 comes into contact with it.

The cross-sectional shape of the protrusion 16 is similar to the annular protrusion 8 shown in FIG. The projections 16 are dimensioned to undergo elastic compression when the projections 16 are bent.

Notch portion for cutting one part of the annular body 5. The recess 6 provided on the inner circumferential surface 2 and the receiving surface 7 provided on the outer circumferential surface opposite to the notch 5 are similar to those of the retaining ring A.

FIG. 15 shows a longitudinal cross-sectional view of the retaining ring B fitted onto the shaft S (al).

The protrusion 16 elastically presses the side wall of the insertion groove 1, and the retaining ring B
Similar to the retaining ring A, the retaining ring A does not wobble within the insertion groove 1.

Further, the protrusion 16 may be provided on the side surface 4 instead of the side surface 3, or may be provided on the side surface 3 and the side surface 4.

Also, regarding the above-mentioned retaining rings A1 to 80, the annular protrusion 8
A protrusion 16 may be provided instead.

FIG. 16 shows a C-shaped retaining ring A8 for a shaft with a protrusion 16 instead of the annular protrusion 8, and a recess 15 is not provided between the protrusions 14 and 14 for tool hooking, and the tool is attached to the surface protrusion 14. A retaining ring B with a hole 17 into which the tip is inserted is shown.

To attach the retaining ring B1 to the insertion groove 1, insert the tip of a tool with an open tip into the hole 17, open the tip of the tool to enlarge the inner peripheral surface 2 than the diameter of the outer peripheral surface of the shaft S, and then insert the retaining ring B1 into the insertion groove 1. B1 is inserted from the end of the shaft S and fitted into the insertion groove 1.

The protrusion 16 of the retaining ring Bl fitted into the insertion groove 1
As in the case of the retaining ring B, the retaining ring B elastically presses the side wall of the retaining ring B, so that the retaining ring B does not shake within the insertion groove 1.

As mentioned above, the retaining ring for the shaft A-A8. B and B1
Annular protrusion 8 and protrusion 16 that do not rattle inside the insertion groove 1
can be similarly provided to the retaining ring for the hole.

Figure 17 is a front view of the required retaining ring, Figure 18 is part M.
FIG. 2 shows a longitudinal cross-sectional view of a retaining ring fitted into an insertion groove 18 provided around a hole H of FIG.

The retaining ring has a ring-shaped body having an outer circumferential surface 19 having an outer diameter slightly larger than the inner diameter of the insertion groove 18 and side surfaces 3 and 4 substantially perpendicular to the outer circumferential surface 19. A notch 20 for cutting is provided, protrusions 21° 21 are provided on both sides of the notch 20 that protrude from the inner peripheral surface, and a hole 22 into which the tip of the tool is inserted is bored in the surface protrusion 21. .

The side surface 3 is provided with an annular projection 8 that contacts near the inner peripheral edge of the side wall of the insertion groove 18 .

The shape of the annular projection 8 is the same as that of the retaining ring A shown in FIG. 3, and insertion guide surfaces 8a are formed on both sides.

The height of the annular projection 8 is such that the annular projection 8 of the retaining ring inserted into the insertion groove 18 is pressed against the side wall of the insertion groove 18 and subjected to elastic compression.

In order to insert the retaining ring for the hole configured as described above into the insertion groove 18, insert the tips of the tool into the two holes 22, narrow the gap between the tips of the tool, and the outer diameter of the outer circumferential surface 19. The dimensions are smaller than the diameter of hole I of part M, and the retaining ring is attached to hole H.
The retaining ring is inserted into the insertion groove 18 by opening the tip of the tool at the insertion groove 18.

When the retaining ring is inserted into the insertion groove 18, the insertion guide surface 8a of the retaining ring hits the corner of the side wall of the insertion groove 18, and the annular projection 8 is inserted into the insertion groove 18 while being elastically compressed.

Even after the retaining ring is inserted into the insertion groove 18, the annular protrusion 8 elastically presses into contact with the side wall of the insertion groove 18, so the retaining ring does not wobble within the insertion groove 18.

In the above explanation, the annular protrusion 8 is provided on the side surface 3, but it can be provided on the side surface 4 instead of the side surface 3, or it may be provided on the side surface 3 and the side surface 4 as shown in the longitudinal cross-sectional view of FIG. It can also be used as a retaining ring.

Further, in place of the annular projection 8, a large number of arc-shaped projections 16 similar to the annular projection 8 may be arranged in a similar manner to the retaining ring B.

Retaining rings A-A, B, B1 and D for the shafts mentioned above
The material of the retaining ring can be a metal material such as spring steel or stainless steel for springs as in the case of conventional retaining rings, but it is preferable to use a plastic material such as polyacecool resin as it is easy to mold and has high elasticity. Can be done.

With a metal retaining ring, for example, when the attached part rotates with respect to a fixed shaft, the retaining ring that is in contact with the attached part rotates and generates metal noise between it and the shaft. However, if the retaining ring is made of plastic material, there is an advantage that this noise does not occur.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

(1) With conventional retaining rings, even if they are manufactured within dimensional tolerances, there is a gap between the retaining ring and the insertion groove, which causes the retaining ring to rattle or fall, preventing the attached part from being held vertically. However, the present invention has solved this problem.

(2) When the retaining ring of the present invention is inserted into the insertion groove, insertion resistance increases due to elastic compression that occurs in the annular projection or protrusion, but the insertion resistance is reduced by providing an insertion guide surface on the annular projection or projection, Made it easier to insert the retaining ring.

Further, in the E-type retaining ring for the shaft, a receiving surface for a pressing tool is provided to facilitate press insertion of the retaining ring.

The receiving surface of this pressing tool is also effective for conventional E-type retaining rings for shafts that do not have annular projections or projections.

[Brief explanation of drawings]

1 to 19 show embodiments of the present invention, FIG. 1 is a front view of an E-type retaining ring for shafts, FIG. 2 is a vertical cross-sectional view of the same retaining ring, and FIG. 3 is a second 4 is a longitudinal sectional view of an E-type retaining ring for shafts with annular protrusions on both sides; FIG. 5 is a front view of an E-type retaining ring for shafts with receiving surfaces; Figure 6 is a longitudinal cross-sectional view of Figure 5, Figures 7 and 8 are front views of E-type retaining rings for shafts with different shapes of recesses, and Figure 9 is E-type retaining rings for shafts without recesses. 10 to 12 are front views of retaining rings for shafts with different cross-sectional shapes.
Figure 13 is a front view of a C-type retaining ring for shafts, Figure 14 is a front view of an E-type retaining ring for shafts with protrusions on the side, and Figure 15 is the same as above. Figure 16 is a front view of a C-shaped retaining ring for shafts with protrusions on the side, Figure 17 is a front view of a retaining ring for C-shaped holes, and Figure 18 is the same as above. Fig. 19 is a longitudinal sectional view of a retaining ring for a C-shaped hole with annular protrusions on both sides, and Fig. 20 shows the relationship between a conventional E-shaped retaining ring for shafts and the insertion groove of the shaft. It is a partially broken side view shown. A~As, B, B+, C, D, D+... Retaining ring, S... Shaft, P... Mounted part, M... Part, ■]... Hole, 1... Insertion groove, 2...inner peripheral surface, 3
, 4...Side surface, 5...Notch portion, 7...Receiving surface, 8
...Annular projection, 8a...Insertion guide surface, 13...Notch, 16...Protrusion, 18...Insertion groove, 19...
Outer peripheral surface, 20...notch portion. Patent applicant: Chubu Bearing Manufacturing Co., Ltd. No. 10
Figure 9 Figure 11 Figure 12 Figure 13 Figure 14

Claims (5)

[Claims] (1) Cut one point of the ring-shaped body into a ring-shaped body that has an inner circumferential surface that fits into an insertion groove provided around the outer circumferential surface of the shaft, and has both side surfaces approximately perpendicular to the inner circumferential surface. A stop for a shaft, which is provided with a notch, and at least one of the two side surfaces is provided with an annular projection having a cross-sectional shape that is in contact with near the outer peripheral edge of the side wall of the insertion groove and has an insertion guide surface. ring. (2) Cut one point of the ring-shaped body into a ring-shaped body that has an inner circumferential surface that fits into an insertion groove provided around the outer circumferential surface of the shaft, and has both side surfaces approximately perpendicular to the inner circumferential surface. and a plurality of protrusions having a cross-sectional shape having an insertion guide surface along a circumference located near the outer peripheral edge of the side wall of the insertion groove on at least one of the two side surfaces. A retaining ring for the installed shaft. (3) Cut one point of the ring-shaped body into a ring-shaped body that has an inner circumferential surface that fits into an insertion groove provided around the outer circumferential surface of the shaft, and has both side surfaces approximately perpendicular to the inner circumferential surface. In a retaining ring for a shaft, the end face of the notch is pressed against the insertion groove to fit the inner circumferential surface into the insertion groove, and the retaining ring is pressed against the outer circumferential surface on the substantially opposite side of the notch. A retaining ring for shafts with a carved tool receiving surface. (4) Cutting one point of the ring-shaped body into a ring-shaped body having an outer circumferential surface that fits into an insertion groove provided around the inner circumferential surface of the hole, and having both side surfaces substantially perpendicular to the outer circumferential surface. A retaining ring for a hole, which is provided with a notch and on at least one of the two side surfaces is provided with an annular projection having a cross-sectional shape that contacts near the inner peripheral edge of the side wall of the insertion groove and has an insertion guide surface. . (5) Cutting one point of the ring-shaped body into a ring-shaped body having an outer circumferential surface that fits into an insertion groove provided around the inner circumferential surface of the hole, and having both side surfaces substantially perpendicular to the outer circumferential surface. A notch is provided, and a number of protrusions having a cross-sectional shape having an insertion guide surface are provided on at least one of the two side surfaces along a circumference located near the inner peripheral edge of the side wall of the insertion groove. A retaining ring for the hole.