JPS5923914Y2 - Retaining ring retaining structure - Google Patents

Description

[Detailed description of the invention] The present invention provides an annular groove on the inner peripheral surface of the outer member, inserts a retaining ring into the annular groove, and applies a thrust direction that acts on the inner member inserted into the outer member by the retaining ring. In a device capable of receiving force, the structure prevents the retaining ring from coming out of the annular groove, and is particularly suitable for application to retaining rings used at joints between pipes and bearings. This invention relates to a retaining ring retaining structure.

For example, as shown in Figure 1, the unit length of piping is 1°2.3
In a pipe line in which pipes are successively joined together and fluid is allowed to flow inside, there is a structure in which each pipe is joined using a retaining ring.

To explain the joints between each pipe with reference to FIGS. 1 and 2, at the joint between pipe 1 and pipe 2, pipe 1
An outer cylinder 1A having a diameter larger than that of the pipe is fixed to the pipe end, and an inner cylinder 2B to be inserted into the outer cylinder 1A is fixed to the pipe end of the pipe 2.

Then, an annular groove 4 is provided on the inner peripheral surface of the outer cylinder 1A, a retaining ring 5 is inserted into the annular groove 4, and the retaining ring 5 is inserted into the inner peripheral surface of the inner cylinder 2B.
The structure is such that the piping 2 can receive a force in the thrust direction when the piping 2 tries to be pulled out from the piping 1 by colliding with the end face of the piping 1.

Further, at the joint between the pipe 2 and the pipe 3, an outer cylinder 2A is fixed to the end of the pipe 2, an inner cylinder 3B to be inserted into the outer cylinder 2A is fixed to the end of the pipe 3, and the outer cylinder 3B is fixed to the end of the pipe 3. A retaining ring 5 is inserted into an annular groove 4 provided on the inner circumferential surface of the cylinder 2A, and the retaining ring 5 is configured to receive the same force in the thrust direction as described above.

Note that 6 in the figure indicates an O-ring that keeps the gap between the outer cylinder and the inner cylinder of the pipe liquid-tight.

In pipes with the above-mentioned joint structure, retaining rings at each joint are caused by contraction and expansion in the axial direction of the pipe due to the fluid force of the liquid flowing inside the pipe, changes in outside air temperature, temperature of the fluid, etc. A thrust force acts on 5.

For example, at the joint between pipe 1 and pipe 2, a retaining ring 5
Thrust force F1 acts on .

Also, due to misalignment or bending of the axes of piping 1 and 2, piping 1
A radial load F2 from the outer cylinder 1A also acts.

Since there is a gap between the retaining ring 5 and the annular groove 4, the retaining ring 5 is inclined within the annular groove 4.

If the inclination angle of the retaining ring 5 at this time is α, component forces F1sinα and F2CO3α act on the retaining ring 5 in the inner circumferential direction.

Point A (the contact point between the corner of the inner cylinder 2B and the side surface of the retaining ring 5) supports the resultant force of F1sinα and F2CO3α.
Point B (contact point between the corner of the annular groove 4 and the side surface of the retaining ring 5) and point C (contact point between the angle of the retaining ring 5 and the inner surface of the annular groove 4)
This is the frictional force at three locations.

The above-mentioned frictional force varies greatly depending on the surface roughness of the contact portion at points A, B, and C, the adhesion of oil, etc., so if the frictional force decreases, the retaining ring 5 will move into the annular groove 4. If the ring is pulled out, it will no longer function as a retaining ring.

Such problems may also occur in retaining rings used in oil receivers.

That is, as shown in FIG. 3, an annular groove 10 is provided on the inner peripheral surface of a housing 9 that supports the shaft 7 via a bearing 8, and a retaining ring 11 inserted into the annular groove 10 acts on the shaft 7. Even in a bearing structure that can receive thrust in the thrust direction, the retaining ring 11 is removed from the annular groove 10 in the same manner as described above.

Note that 12 in the figure indicates a backing plate interposed between the bearing 8 and the retaining ring 11.

An object of the present invention is to provide a highly reliable retaining ring retaining structure that prevents the retaining ring that supports the member receiving the force in the thrust direction from coming off as described above.

In order to achieve this objective, the retaining ring retaining structure of the present invention provides an annular groove on the inner circumferential surface of the outer member, inserts the retaining ring into the annular groove, and inserts the retaining ring into the outer member. In the device that is able to receive a force in the thrust direction acting on the inner member by colliding with the end face of the inserted circular inner member, between the inner circumferential surface of the retaining ring and the outer circumferential surface of the inner member,
The present invention is characterized in that an annular spacer is interposed which contacts the inner circumferential surface of the retaining ring and restricts movement of the retaining ring in the inner circumferential direction.

The details of the present invention will be explained below with reference to the drawings.

Fig. 4 is a sectional view of a pipe line provided with a retaining ring retaining structure according to the present invention, and Fig. 5 is an enlarged sectional view of a pipe joint in Fig. 4, with the same reference numerals as in Figs. 1 and 2. The ``things'' represent the same thing or something equivalent.

An annular spacer 13 is interposed between the inner circumferential surface of the retaining ring 5 and the outer surface of the piping 2, which contacts the inner circumferential surface of the retaining ring 5 and restricts movement of the retaining ring 5 in the inner circumferential direction. has been done.

That is, the outer diameter of the annular spacer 13 is selected so that a slight gap exists between the outer circumferential surface of the annular spacer 13 and the inner circumferential surface of the retaining ring 5.

Further, a stepped portion 13A having a larger diameter than the outer circumferential surface is provided on one end surface of the annular spacer 13, and a slight gap is formed between the outer circumferential surface of the stepped portion 13A and the inner circumferential surface of the outer cylinder 1A of the pipe 1. The outer diameter dimensions are selected so that

The movement of the annular spacer 13 in the axial direction is restrained by a number of auxiliary retaining rings 14 arranged on the stepped portion 13A.

The retaining ring 14 has an annular groove 15 provided on the inner peripheral surface of the outer cylinder 1A.
is inserted into.

In the above-mentioned pipe, when a fluid flows inside the pipe, the retaining ring 5 of each pipe joint part contracts the pipes 1, 2.3 based on the fluid force of the fluid and temperature changes (fluid temperature, outside air temperature). , a force F1 in the thrust direction due to elongation, etc., and a radial load F2 due to misalignment and bending of the axes of the pipes.

The retaining ring 5 is tilted within the annular groove 4 by the thrust I/force F1 and the radial load F2.

If the initial rotation angle of the retaining ring 5 at this time is α, component forces F, sin α and F2C06α in the inner circumferential direction act on the retaining ring 5, and the resultant force causes the retaining ring 5 to move away from the annular groove 4. Nauki will be trying to get out.

However, in the retaining ring retaining structure according to the present invention, when the retaining ring 5 tries to come out from the annular groove 4 due to the resultant force of F1 sin α and F2 cos α, the retaining ring 5 has a small gap with its inner peripheral surface. Although the annular spacer 13 is pushed upward as shown in the figure by coming into contact with the outer peripheral surface of the annular spacer 13,
The annular spacer 13 is stopped at least on the other side in the diametrical direction by the outer cylinder 1A, and is prevented from moving upward.

That is, in this embodiment, at the same time that the annular spacer 13 is stopped by the outer cylinder 1A via the retaining ring 5,
The outer circumferential surface E of the stepped portion 13A contacts the inner circumferential surface of the outer cylinder 1A to prevent upward movement, thereby preventing the retaining ring 5 from coming out of the annular groove 4.

At this time, the retaining ring 14 only regulates the position of the annular spacer 13 and is not subjected to the thrust force F1.
There's no way I'll be left out.

Further, in the embodiment, the step portion 13A is formed on one end surface of the retaining ring 5.
is provided, and the resultant force in the inner circumferential direction acting on the retaining ring 5 (F1Si
nα+F2CO3α) to the pipe 1 via the stepped portion 13A.
Although the receiver is stopped by the outer cylinder 1A, the stepped portion 13A is not necessarily necessary in the present invention.

That is, if the annular spacer 13 is placed between the inner circumferential surface of the retaining ring 5 and the outer circumferential surface of the inner member so that the outer circumferential surface of the annular spacer 13 and the inner circumferential surface of the retaining ring 5 are in contact with each other, The resultant force acting on the retaining ring 5 is stopped by the outer peripheral surface of the annular spacer 13, and the annular spacer 13 is applied to the outer cylinder 1 via the retaining ring 5 at least on the other side in the diametrical direction.
Since the receiver is stopped at A, the movement of the retaining ring 5 in the direction of removal from the annular groove 4 is restricted.

FIG. 6 shows an example in which the retaining structure according to the present invention is applied to a retaining ring of a bearing.

That is, on the inner peripheral surface of the retaining ring 10 that retains the bearing 8,
Step portion 23A that restricts movement of the retaining ring 10 in the inner circumferential direction
An annular spacer 23 is provided.

In addition, in the figure, 7 is a shaft, 9 is a housing, and 12 is a retaining ring 10.
A backing plate interposed between the bearing 8 and the bearing 8 is shown.

This embodiment can also achieve the same functions and effects as those of the above-mentioned embodiments.

That is, since the force acting on the retaining ring 10 in the inner circumferential direction is stopped by the housing 9 via the annular spacer 23,
The retaining ring 10 will no longer come out of the annular groove.

As explained above, according to the present invention, the movement in the inner circumferential direction of the retaining ring that receives and stops the inner member receiving the force in the thrust direction is controlled by the inner circumferential surface of the retaining ring and the outer circumferential surface of the inner member. It is possible to reliably prevent the retaining ring from coming out by regulating it with an annular spacer interposed between the retaining rings.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a pipe line that uses a retaining ring at the pipe joint.
Fig. 2 is an enlarged view of part A in Fig. 1, which explains the state in which the retaining ring is removed, Fig. 3 is a cross-sectional view of the bearing section that employs the retaining ring, and Fig. 4 is a retaining ring according to the present invention. FIG. 5 is an enlarged view of the opening of FIG. 4, and FIG. 6 is a cross-sectional view of a bearing section that also has a retaining ring retaining structure according to the present invention. . 1, 2. 3...Piping, IA, 2A...
...Outer cylinder, 2B, 3B...Inner cylinder, 4...
・Annular groove, 5, 10... Retaining ring, 7...
・Shaft, 8... Bearing, 9... Housing, 13, 23... Annular spacer, 13A, 23
A... Danbe.

Claims (1)

[Scope of utility model registration request] An annular groove is provided on the inner circumferential surface of the circular outer member, a retaining ring is inserted into the annular groove, and the retaining ring is brought into contact with the end face of the circular inner member inserted into the outer member to act on the inner member. In the device capable of receiving a force in a thrust direction, the retaining ring is in contact with the inner circumferential surface of the retaining ring between the inner circumferential surface of the retaining ring and the outer circumferential surface of the inner member, and the retaining ring is moved toward the inner circumferential direction of the retaining ring. A retaining ring retaining structure characterized by interposing an annular spacer to restrict the movement of the retaining ring.