JP2769557B2 - Retaining ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a case in which a mounted component fitted to a shaft or a mounted component fitted to a hole moves or drops in an axial direction. The present invention relates to a retaining ring for a shaft or a hole to be prevented.

[Conventional technology]

JIS for retaining ring for shaft or retaining ring for hole
Standards are specified, and JIS standard products are generally used.

FIG. 20 shows that the insertion groove 1 provided on the outer peripheral surface of the shaft S
FIG. 3 is a partially broken front view showing a state in which an E-shaped retaining ring C for a shaft, which is established by the S standard, is inserted from a side surface of the shaft S.

A notch is provided at one place in the circumferential direction of the retaining ring C, and the notch is pressed against the insertion groove 1 to increase the width of the notch.
The inner peripheral surface 2 is fitted into the insertion groove 1.

In order for the retaining ring C to be fitted into the insertion groove 1, the retaining ring C
Must be smaller than the width dimension T of the insertion groove 1, but the difference (T−t) between the two dimensions becomes a play between the insertion groove 1 and the retaining ring C, and the retaining ring C It is desirable to make the size as small as possible, because it may cause a backlash in the axial direction.

For this reason, dimensions T and t are each provided with a dimension intersection, and the amount of play is limited.

[Problems 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 dimension crossing, the actual play is about 0.1 mm in the case of the 8φ bearing, and the axial direction of the mounted part is Retaining ring C used to prevent the movement of
There is a possibility that rattling may occur at the front and rear widths.

If the play gap is made smaller than this, there arises a problem that component manufacturing costs are expensive and a problem that it becomes difficult to fit the retaining ring C into the insertion groove.

Such a problem is not limited to a retaining ring for a shaft, but also occurs in a retaining ring for a hole.

The present invention has been made to solve such a problem, and it is an object of the present invention to provide a retaining ring that eliminates a play between a retaining ring and an insertion groove and that can be easily attached to the insertion groove.

[Means for solving the problem]

In order to achieve the above object, in a shaft retaining ring, at least one of both side surfaces, an annular projection located near an outer peripheral edge of a side wall of the insertion groove when inserted into the insertion groove of the shaft. (Or, a number of protrusions arranged along the circumference located near the outer peripheral edge of the side wall of the insertion groove).

The height of the annular projection (or a number of projections) is slightly larger than the gap formed between the inner wall surface of the insertion groove and the retaining ring, and the height of the annular projection decreases toward the insertion direction. Form a guide surface.

In the above-mentioned retaining ring for the shaft, a receiving surface for the pressing tool can be engraved on the outer peripheral surface opposite to the notch formed in the retaining ring.

In a retaining ring for a hole, at least one of both side surfaces has an annular projection (or an inner peripheral edge of a side wall of the insertion groove) positioned near an inner peripheral edge of a side wall of the insertion groove when inserted into the insertion groove of the hole. (A number of protrusions) arranged along the circumference of a nearby object.

The height of the annular projection (or a number of projections) is slightly larger than the gap formed between the inner wall surface of the insertion groove of the hole and the retaining ring, and the height of the annular projection decreases in the insertion direction. Form an insertion guide surface.

(Operation)

When the retaining ring is fitted into the insertion groove, the annular projection or a number of projections provided on one side or both side surfaces of the retaining ring hit both side walls of the insertion groove, and the annular projection or the number of projections is inserted into the insertion guide. Since the surface is provided, it is elastically compressed and fits into the insertion groove.

Even after the retaining ring has been fitted into the insertion groove, the annular ring or a number of projections elastically press and contact the side wall of the insertion groove, so that the retaining ring does not rattle.

Further, since the annular projection or the multiple projections are provided near the peripheral edge of the side wall, there is an effect of preventing the retaining ring from tilting.

When the retaining ring is inserted into the insertion groove, the annular projection or a large number of projections are elastically compressed, so that a fitting pressure is required. However, in the case of an E-shaped retaining ring for a shaft, the tool is easily inserted by pressing the tool against the receiving surface. Becomes

This receiving surface can also be applied to an E-shaped retaining ring for a shaft that does not have an annular projection or a large number of 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 an E type,
FIG. 2 is a longitudinal sectional view of a retaining ring A fitted in an insertion groove 1 provided around the shaft S.

In the figure, the shaft S is inserted groove 1 is circumferentially to the outer peripheral surface consisting diameter d ₁ becomes diameter d _2.

The retaining ring A is an annular body having an inner peripheral surface 2 having an inner diameter slightly smaller than the dimension d ₂ and having side surfaces 3 and 4 substantially perpendicular to the inner peripheral surface 2. width dimension d ₃ becomes notch 5 is provided at a location.

This width dimension d ₃ is less than the diameter d ₂ of the insertion groove 1, stop because the ring A is composed of a material having elasticity, the elastic notches 5 against the notch portion 5 into the insertion groove 1 limits the inner peripheral surface 2 is made larger than the notch portion diameter d ₂ of the width dimension d ₃ of the insertion groove 1 of 5 can be fitted into the insertion groove 1 when expanded within.

In order to facilitate the enlargement of the notch 5, there is provided a squeezed portion 6 at two places on the inner peripheral surface 2 of the retaining ring A.

Also, in order to easily press the retaining ring A into the insertion groove 1,
A concave receiving surface 7 for tool pressing is formed on the outer peripheral surface on the opposite side of the notch 5.

The reason why the receiving surface 7 is made concave is to prevent the tip of the pressing tool from escaping in the lateral direction. However, if the tip of the tool is flat, the shape of the receiving surface 7 may be flat instead of concave. Absent.

However, when the receiving surface 7 is concave, there is an advantage that the effect that the receiving surface 7 promotes the elastic deformation of the retaining ring A becomes large as in the case of the slack 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 diameter slightly smaller than the outer diameter d ₁ of the outer peripheral surface of the shaft S is provided on the side surface 3.

The annular projection 8 is formed with insertion guide surfaces 8a, 8a having inclined surfaces that become lower in the insertion / removal direction to facilitate insertion / removal into the insertion groove 1. When inserted into the insertion groove 1, the corner of the insertion groove 1 hits the insertion guide surface 8a, and the retaining ring A is smoothly inserted into the insertion groove 1 while the annular projection 8 generates elastic compression.

The height of the annular projection 8 is determined such that the dimension from the end face 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 width dimension T of the insertion groove 1.

To attach the retaining ring A configured as described above to the insertion groove 1, the end face of the notch 5 of the retaining ring A is applied to the insertion groove 1,
When the tool is pressed against the receiving surface 7, the width of the notch 5 increases, and the inner peripheral surface is fitted into the insertion groove 1.

When the retaining ring A is fitted into the insertion groove 1, a component force for compressing the annular projection 8 acts on the insertion guide surface 8a hitting the corner of the insertion groove 1, and the annular projection 8 is elastically compressed and the retaining ring A is inserted. Groove 1
Is fitted to.

Since the retaining ring A fitted in the insertion groove 1 is in press contact with the side wall of the insertion groove 1, the retaining ring A has a play free with respect to the insertion groove 1 without any play.

Accordingly, the retaining ring A prevents the mounted component P from moving without rattling.

In the above description, the annular protrusion 8 is provided on the side surface 3, but may be provided on the side surface 4 without providing the annular protrusion 8.

Figure 4 is a longitudinal sectional view of the retaining ring A ₁ and the shaft S with the annular projection 8 provided on the side surface 3 and the side surface 4.

In such a case, the annular projections 8 provided on the side surfaces 3 and 4 are elastically deformed.
There is an advantage that the amount of elastic deformation generated in the above is reduced by half.

Snap ring A or A ₁ has an annular projection 8, when inserted into the insertion groove 1, since the annular protrusion 8 is elastically compressed, but slightly insertion resistance compared to conventional retaining ring is increased, the tool facilitated the insertion of the retaining ring a or a ₁ a receiving surface 7 in so as to press.

As shown in FIGS. 5 and 6, the receiving surface 7 can also be provided on a conventional E-shaped retaining ring C having no annular projection 8, and the retaining ring C is pressed into the insertion groove 1 and attached. At that time,
This has the effect of facilitating pressing by the tool and facilitating elastic deformation of the retaining ring C.

7 is a front view of the retaining ring A ₂ showing a modification of the retaining ring A.

The retaining ring A ₂ is an E-shaped retaining ring in which two notches 9 are provided in the vicinity of the notch portion 5 in place of the notch portion 6.
Is characterized by a large deformation near.

Figure 8 is a front view of a snap ring A ₃ illustrating another modification, instead of the relief portion 6, in retaining ring E type in which a relief portion 10 of the T-shaped on the opposite side of the notch 5 is there.

Each of the retaining rings A ₂ and A ₃ is provided with the slidable portions 9 and 10 on the inner peripheral surface 2 to facilitate the enlargement of the notch 5, but if the material of the retaining ring is made of a material having high elasticity, As shown in FIG.
Without the relief portion on the inner peripheral surface 2 may be provided as a snap ring A ₄ which allowed to elastically deform by using only receiving surface 7.

In any of the retaining rings A ₂ , A ₃ , and A ₄ , the provision of the annular projection 8 on one or both of the side surfaces 3 and 4 is the same as that of the retaining ring A or A ₁ .

Figure 10 shows a retaining ring A ₅ having an increased outer diameter of the fitting P side of the side surface 4 of which is mounted on the shaft S with longitudinal sectional view showing a modified example of the cross-sectional shape of the snap ring A.

Retaining ring A ₅ represents an outer diameter of the attachment component P is large, is used when must receive the mounting part P in a wide pressure receiving surface.

Figure 11 is a longitudinal sectional view showing another modified example, showing a snap ring A ₆ to and provided with a relief portion 11 on the side surface 3 of the retaining ring of the thick large diameter.

When the material of the retaining ring is a plastic material such as a polyacetal resin, the squeezed portion 11 is provided in order to prevent sink marks peculiar to the plastic material generated in the manufacturing process.

FIG. 12 is a longitudinal sectional view showing still another modified example,
₉ shows a retaining ring A7 provided with a protruding portion 12 protruding from the side surface 3 on the outer peripheral edge of the ring.

Retaining ring A _7, when the fitting into the insertion groove 1 by pressing the outer peripheral surface of the retaining ring A _7, width is wide it is manual or tool working the outer peripheral surface is performed easily advantages.

Above mentioned stop ring A _5, the cross-sectional shape of the A ₆ and A ₇ are not limited to the E-type retaining ring, it can be used as well for the C-type retaining ring which will be described later.

Figure 13 shows a retaining ring A ₈ axes for C type, which is fitted from the end portion of the shaft S.

The retaining ring A ₈ is provided with a notch 13 narrower than the notch 5, and provided with tooling projections 14 protruding from the outer peripheral surface on both sides of the notch 13, between the projections 14, 14. A recess 15 for receiving a tool wider than the notch 13 is formed.

As in the case of the retaining ring A, the annular projection 8 is provided on one or both of the side surfaces 3 and 4.

To install the snap ring A ₈ into the insertion groove 1, the recess of the retaining ring A ₈
At 15, insert a tool whose tip is enlarged, open the tip of the tool, enlarge the inner diameter of the inner peripheral surface 2 of the retaining ring A _{8 to} a size larger than the diameter of the outer peripheral surface of the shaft S, and ₈ is inserted from the end of the shaft S and fitted into the insertion groove 1.

FIG. 14 is a front view showing a modified example of the annular projection 8 of the retaining ring A, and shows a retaining ring B in which the annular projections 8 continuous along the arc are formed as intermittently arranged projections 16.

A large number of the protrusions 16 are arranged on a circumference slightly smaller in 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, near the outer peripheral edge of the side wall of the insertion groove 1. The protrusion 16 contacts.

The cross-sectional shape of the protrusion 16 is the same as that of the annular protrusion 8 shown in FIG. 3, and the insertion guide surfaces 8a are formed on both side surfaces.
Like the annular projection 8, the projection 16 is dimensioned to undergo elastic compression when inserted into the insertion groove 1.

The notch 5, which cuts one portion of the ring-shaped body, the insulated portion 6 provided on the inner peripheral surface 2, and the receiving surface 7 provided on the outer peripheral surface opposite to the notch 5, are the same as the retaining ring A.

FIG. 15 shows a longitudinal sectional view of a retaining ring B fitted in the insertion groove 1 of the shaft S.

The protrusion 16 elastically presses the side wall of the insertion groove 1 and the retaining ring B
Is not rattled in the insertion groove 1 as in the case of the retaining ring A.

In addition, the protrusion 16 may be provided on the side surface 4 without being provided on the side surface 3, or may be provided on the side surface 3 and the side surface 4.

Further, the retaining ring A ₁ to A ₈ described above may also be provided with a projection 16 instead of the annular projection 8.

FIG. 16, the retaining ring B ₁ of C type for axes, the projections 16 instead of the annular projection 8 provided, the recess 15 between the projections 14, 14 for the tool-engaging
Without providing a shows a retaining ring B ₁ having a comb-hole 17 of the tool tip on both the projection 14.

To attach the retaining ring B ₁ to the insertion groove 1, insert the tip of the tool to be opened into the hole 17, open the tip of the tool, and move the inner peripheral surface 2 to the axis S.
, And the retaining ring B ₁ is inserted from the end of the shaft S and fitted into the insertion groove 1.

Protrusions 16 of the retaining ring B _1, which is fitted into the insertion groove 1 presses the sidewalls of the insertion groove 1 elastically, and when the retaining ring B ₁ is a retaining ring B is not rattle in the insertion groove 1 The same is true.

As described above, the annular projections 8 and the projections 16 for preventing the retaining rings A to A ₈ , B and B ₁ for the shaft from rattling in the insertion groove 1 can be similarly provided on the retaining ring for the hole. .

FIG. 17 is a front view of the retaining ring D for holes, and FIG. 18 is a longitudinal sectional view of the retaining ring D fitted in the insertion groove 18 provided around the hole H of the component M.

The retaining ring D has an outer peripheral surface 19 having an outer diameter slightly larger than the inner diameter of the insertion groove 18 and a side surface substantially perpendicular to the outer peripheral surface 19.
The annular body having 3, 4 is provided with a notch 20 for cutting one place of the annular body, and projections 21, 21 protruding from the inner peripheral surface are provided on both sides of the notch 20, and both projections 21 are provided. A hole 22 into which the tip of the tool is inserted is formed.

The side surface 3 is provided with an annular projection 8 that is in contact with 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 annular projection 8 of the retaining ring A shown in FIG. 3, and the insertion guide surfaces 8a are formed on both side surfaces.

The height of the annular projection 8 is the retaining ring D inserted into the insertion groove 18.
The annular projection 8 has a height dimension which is pressed against the side wall of the insertion groove 18 and undergoes elastic compression.

In order to insert the retaining ring D for a hole configured as described above into the insertion groove 18, the tip of the tool is inserted into the two holes 22 and the interval between the tips of the tools is reduced. Dimension is part M
When the retaining ring D is inserted into the hole H and the tip of the tool is opened at the position of the insertion groove 18, the retaining ring D is fitted into the insertion groove 18.

When the retaining ring D fits into the insertion groove 18, the insertion guide surface 8 a of the retaining ring D contacts 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 D is inserted into the insertion groove 18, the annular protrusion 8 elastically presses and contacts the side wall of the insertion groove 18, so that the retaining ring D does not rattle in the insertion groove 18.

In the above description, the annular projection 8 is provided on the side surface 3; however, it can be provided on the side surface 4 instead of the side surface 3. Alternatively, as shown in the vertical sectional view of FIG. it may be used as the snap ring D ₁ was.

Also, as with the retaining ring B, a large number of circular arc-shaped projections 16 may be arranged in place of the annular projection 8.

Or retaining ring for shaft has been described A~A _8, B, the material of the B ₁ and D is may be a metal material such as a conventional retaining rings as well as spring steel or a spring stainless steel, molded For example, a plastic material such as a polyacetal resin can be used as the material having high elasticity and high elasticity.

In the case of a metal retaining ring, for example, when the mounted component rotates with respect to a fixed shaft, the retaining ring that is in contact with the mounted component rotates and generates a metallic squeak sound with the shaft. However, when the retaining ring is made of a plastic material, there is an advantage that this squeak noise does not occur.

〔The invention's effect〕

Since the present invention is configured as described above,
The following effects are produced.

(1) In the conventional retaining ring, even if the retaining ring is manufactured within the dimensional tolerance, a play gap is formed between the retaining ring and the insertion groove, so that the retaining ring rattles or falls down, and holds the mounted component vertically. Although there was a problem that could not be achieved, in the retaining ring of the present invention, the above-mentioned play was eliminated by the annular projection (or a large number of projections).
This problem has been solved.

(2) The insertion resistance increases due to the elastic compression generated in the annular projection or the projection when the retaining ring of the present invention is inserted into the insertion groove. However, the insertion resistance is reduced by providing the annular projection or the projection with an insertion guide surface. Easy to insert retaining ring.

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

The receiving surface of the pressing tool is also effective for a conventional E-shaped snap ring for a shaft having no annular projection or projection.

[Brief description of the drawings]

1 to 19 show an embodiment of the present invention. FIG. 1 is a front view of an E-shaped retaining ring for a shaft, FIG. 2 is a longitudinal sectional view of the retaining ring of the same, FIG. FIG. 4 is a partially enlarged view of FIG. 4, FIG. 4 is a longitudinal sectional view of a shaft E-shaped retaining ring provided with annular projections on both side surfaces, FIG. 5 is a front view of the shaft E-shaped retaining ring provided with a receiving surface, 6 is a longitudinal sectional view of FIG. 5, FIG. 7 and FIG. 8 are front views of E-shaped retaining rings for shafts having different shapes of sunk portions, and FIG. 10 to 12 are longitudinal sectional views of E-shaped retaining rings for shafts having different cross-sectional shapes, respectively. FIG. 13 is a front view of a C-shaped retaining ring for shafts, and FIG. Is a front view of an E-shaped retaining ring for a shaft provided with a projection on a side surface, FIG. 15 is a longitudinal sectional view of the retaining ring of the same, and FIG. 16 is a front view of a C-shaped retaining ring for a shaft provided with a projection on a side surface. Fig. 17 is a front view of a retaining ring for a C-shaped hole. FIG. 18 is a longitudinal sectional view of the same, FIG. 19 is a longitudinal sectional view of a retaining ring for a C-shaped hole having annular projections on both sides, and FIG. 20 is a conventional retaining ring of an E-type for a shaft and insertion of the shaft. It is a partially broken side view which shows the relationship with a groove | channel. _{A~A 8, B, B 1,} C, DD 1 ...... stop ring, S ...... axis, P ...... the fitting, M ...... components, H ...... holes, 1 ...... insertion groove, 2 ......
Inner peripheral surface, 3,4 ... side surface, 5 ... notch, 7 ... receiving surface,
8 ... annular projection, 8a ... insertion guide surface, 13 ... notch, 16
... Projection, 18 Insertion groove, 19 Outer peripheral surface, 20 Notch.

Claims (5)

(57) [Claims] An annular member having an inner peripheral surface fitted into an insertion groove provided on an outer peripheral surface of a shaft and having both side surfaces substantially perpendicular to the inner peripheral surface is provided at one position of the annular member. In a retaining ring for a shaft provided with a notch portion for cutting a groove, at least one of the side surfaces, an annular projection located near the outer peripheral edge of the side wall of the insertion groove when inserted into the insertion groove. The height of the annular projection is slightly larger than the gap formed between the inner wall surface of the insertion groove and the retaining ring, and the annular projection has an insertion guide surface that becomes lower in the insertion direction. A retaining ring for a shaft, wherein the retaining ring is made. 2. A ring-shaped body having an inner peripheral surface fitted into an insertion groove provided on an outer peripheral surface of a shaft, and having two side surfaces substantially perpendicular to the inner peripheral surface, wherein one part of the ring-shaped body is provided. A retaining ring for a shaft provided with a notch for cutting the groove, on at least one of the two side surfaces, along a circumference located near an outer peripheral edge of a side wall of the insertion groove when inserted into the insertion groove. The height of the projections is slightly larger than the gap formed between the inner wall surface of the insertion groove and the retaining ring, and the height of the projections decreases in the insertion direction. A retaining ring for a shaft, wherein an insertion guide surface is formed. 3. The retaining ring for a shaft according to claim 1, wherein a receiving surface for a pressing tool is formed on the outer peripheral surface of the retaining ring substantially opposite to the notch. 4. An annular member having an outer peripheral surface fitted into an insertion groove provided on an inner peripheral surface of a hole and having both side surfaces substantially perpendicular to the outer peripheral surface. In a retaining ring for a hole provided with a cutout portion to be cut, at least one side surface of the both side surfaces, an annular projection located near the inner peripheral edge of the wall side of the insertion groove when inserted into the insertion groove. The height of the annular projection is slightly larger than the gap formed between the inner wall surface of the insertion groove and the retaining ring, and the annular projection has an insertion guide surface that decreases in the insertion direction. A retaining ring for a hole characterized by being formed. 5. An annular member having an outer peripheral surface fitted into an insertion groove provided on an inner peripheral surface of a hole and having both side surfaces substantially perpendicular to the outer peripheral surface. In a retaining ring for a hole provided with a cutout portion to be cut, on at least one of the two side surfaces, along a circumference located near an inner peripheral edge of a side wall of the insertion groove when inserted into the insertion groove. The height of the projections is slightly larger than the gap formed between the inner wall surface of the insertion groove and the retaining ring. A retaining ring for a hole, wherein a lower insertion guide surface is formed.