Seal ring and seal ring holding structure

Abstract

A seal ring 10 comprises a ring part 12 which is formed in an annular shape and a plurality of attachment parts 14 which are formed on the ring part 12 and which are each inserted into an attachment hole formed in an attachment member. Each attachment part 14 has a protrusion part 16 which protrudes radially outward from the outer circumferential portion of the ring part 12, an axis part 18 which is connected to the protrusion part 16 and which extends along the central axis direction of the ring part 12, and a nail part 20 which protrudes only radially outward from the axis part 18 and which is hooked on the edge of the attachment hole.

Description

Seal ring and seal ring retention structure

[0001] The present invention relates to a seal ring having a mounting portion for mounting to a mounting member, and a retaining structure for the seal ring.

[0002] Patent Document 1 discloses a coolant port assembly including a coolant port having a plate-shaped mounting bracket portion that extends from the outer periphery of a pipe-shaped port portion, a ring-shaped sealing gasket that surrounds the outer periphery of the port portion, and a gasket cover that pressurizes a portion of the sealing gasket to tightly attach it to the mounting bracket portion together with the sealing gasket.

[0003] Special table number 2023-511182

[0004] In the technology described in Patent Document 1, a gasket cover is used to provide a sealing gasket, which increases the number of parts and the number of installation steps.

[0005] An object of the present invention is to provide a technique that can reduce the number of parts and the number of steps required to attach a seal ring.

[0006] In order to solve the above problems, a seal ring according to one aspect of the present invention includes a ring portion formed in an annular shape, and a plurality of mounting portions formed on the ring portion and inserted into mounting holes formed in a mounting member. The mounting portions each have a protruding portion that protrudes radially outward from the outer periphery of the ring portion, a shaft portion that is connected to the protruding portion and extends along the central axis of the ring portion, and a claw portion that protrudes radially outward only from the shaft portion and hooks onto the edge of the mounting hole.

[0007] Another aspect of the present invention is a seal ring retaining structure. This seal ring retaining structure includes a connecting pipe having a flange portion and a seal ring attached to the flange portion. The seal ring retaining structure has an annular ring portion that fits into an annular groove formed in the flange portion, and multiple mounting portions formed on the outer periphery of the ring portion that are inserted into mounting holes formed in the flange portion radially outward of the groove. The mounting portions have a protrusion that protrudes radially outward from the outer periphery of the ring portion, a shaft portion that is connected to the protrusion and extends along the central axis of the ring portion, and a claw portion that protrudes only radially outward from the shaft portion and hooks onto the edge of the mounting hole.

[0008] According to the present invention, a technique can be provided that can reduce the number of parts and the number of mounting steps required for mounting a seal ring.

[0009] It is a perspective view of the seal ring of the embodiment. It is a perspective view of the seal ring holding structure. It is a cross-sectional view of the seal ring holding structure. It is a view for explaining the process of inserting the mounting portion into the mounting hole.

[0010] 1 is a perspective view of a seal ring 10 according to an embodiment of the present invention. The seal ring 10 is attached to a connecting pipe, which will be described later. The seal ring 10 is provided with an attachment portion 14 to prevent it from coming off the connecting pipe.

[0011] The ring portion 12 is formed in an annular shape. A plurality of attachment portions 14 are formed on the ring portion 12. In the embodiment, one pair of attachment portions 14 is provided, but three or more attachment portions 14 may be provided. The direction of the central axis of the ring portion 12 is simply referred to as the axial direction, and the direction perpendicular to the axial direction is referred to as the radial direction.

[0012] The mounting portion 14 has a protruding portion 16, a shaft portion 18, and a claw portion 20. The protruding portion 16 protrudes radially outward from the outer circumferential portion 12a of the ring portion 12. The protruding portion 16 is formed in a flat plate shape. The plate thickness of the protruding portion 16 is smaller than the circumferential width of the protruding portion 16. Therefore, the protruding portion 16 is easily bent in the axial direction. By forming the protruding portion 16 thin and easily bent, it is possible to prevent a decrease in the sealing performance of the ring portion 12.

[0013] The shaft portion 18 is connected to the protruding portion 16 and extends along the central axis of the ring portion 12. The claw portions 20 protrude only radially outward from the shaft portion 18, and do not protrude radially inward. Because the claw portions 20 protrude from the tip end of the shaft portion 18, they are positioned offset from the ring portion 12 in the axial direction. Furthermore, the claw portions 20 are positioned radially outward from the ring portion 12.

[0014] The circumferential width W1 of the claw portion 20 is smaller than the protruding length L1 of the claw portion 20 from the shaft portion 18. By lengthening the claw portion 20, the hooking margin into the mounting hole can be increased. Furthermore, the cross-sectional area of ​​the claw portion 20 can be prevented from increasing, ensuring the ease of bending of the claw portion 20. The circumferential width W1 of the claw portion 20 may be set to half or less of the protruding length L1 of the claw portion 20 from the shaft portion 18.

[0015] The circumferential width W1 of the shaft portion 18 is the same as the circumferential width W1 of the claw portions 20. The circumferential width W1 of the shaft portion 18 is smaller than the radial width W2 of the shaft portion 18. This increases the radial rigidity of the shaft portion 18, making it easier to insert the shaft portion 18 into a mounting hole without bending in the radial direction. Furthermore, because the second moment of area of ​​the shaft portion 18 is greater than that of the claw portions 20, the claw portions 20 can be bent before the shaft portion 18 breaks when inserted into the mounting hole. The circumferential width W1 of the shaft portion 18 may be set to be half or less of the radial width W2 of the shaft portion 18.

[0016] The axial thickness of the protruding portion 16 is smaller than the circumferential width W1 of the shaft portion 18 and the claw portions 20. In other words, the protruding portion 16 is formed to be more flexible than the claw portions 20. The reaction force from the claw portions 20 received from the mounting member is absorbed by the protruding portion 16, thereby reducing the load on the ring portion 12. This makes it possible to prevent a decrease in performance of the ring portion 12 due to the provision of the mounting portion 14.

[0017] Fig. 2 is a perspective view of the seal ring holding structure. Fig. 2(a) is a view of the seal ring holding structure seen from the back side, and Fig. 2(b) is a view of the seal ring holding structure seen from the front side. Fig. 3 is a cross-sectional view of the seal ring holding structure. The connecting pipe 22 functions as an attachment member for attaching the seal ring 10. The seal ring holding structure includes the seal ring 10 and the connecting pipe 22.

[0018] The connecting pipe 22 has a flange portion 24 that protrudes radially outward. The flange portion 24 has mounting holes 26 and grooves 28. A pair of mounting holes 26 are provided penetrating the front and back of the flange portion 24. The grooves 28 are formed as annular recesses on the front side of the flange portion 24. The pair of mounting holes 26 are positioned radially outward from the grooves 28.

[0019] 2(a) shows the state in which the claw portion 20 of the mounting portion 14 is caught on the edge of the mounting hole 26. FIG. 2(b) shows the state in which the ring portion 12 is fitted into the groove portion 28 and the protrusion portion 16 extends from the ring portion 12 toward the mounting hole 26.

[0020] 3 shows the shaft 18 inserted into the mounting hole 26, with the claws 20 on the back side protruding radially outward and hooking onto the edges of the mounting hole 26. A tapered surface 26a is formed on the radially outer edge of the mounting hole 26, and the spacing between the mounting holes 26 increases toward the front side of the mounting hole 26 (the lower side in the figure). The tapered surface 26a functions as a guide when inserting the shaft 18 and claws 20 into the mounting hole 26.

[0021] The mounting portion 14 is inserted into the mounting hole 26 radially outside the groove portion 28. The seal ring 10 is transported attached to the connecting pipe 22, and for example, many seal rings 10 and connecting pipes 22 are placed in one bag for transport. At this time, it is desirable to provide a large catch for the claw portion 20 to prevent other connecting pipes 22 from hitting the mounting portion 14 and becoming dislodged.

[0022] By integrally forming the ring portion 12 and the mounting portion 14, the number of parts can be reduced compared to when a separate part is used to prevent the ring portion 12 from coming off. By having the claw portions 20 protrude only radially outward from the shaft portion 18, the claw portions 20 can be set longer than when they protrude on both sides from the shaft portion 18, and the amount by which the claw portions 20 engage the mounting holes 26 can be increased.

[0023] 4A and 4B are diagrams illustrating the process of inserting the mounting portion 14 into the mounting hole 26. Fig. 4A shows the state in which the tip 18a of the shank 18 is inserted into the mounting hole 26 first, with the outer surface of the claw 20 abutting against the tapered surface 26a. The tip 18a of the shank 18 is inserted partway into the mounting hole 26. The tapered surface 26a is formed on the inner surface located radially outward of the mounting hole 26.

[0024] The mounting portion 14 is further pressed into the mounting hole 26, and as shown in FIG. 4B, the claw portion 20 is bent so as to approach the shaft portion 18. The tapered surface 26a applies an external force to the outer surface of the claw portion 20, gradually drawing it toward the shaft portion 18, and the tip 20a of the claw portion 20 approaches the shaft portion 18.

[0025] The claw portion 20 contacts the radially outer inner surface of the mounting hole 26, causing the tip 20a of the claw portion 20 to bend so as to approach the shaft portion 18, thereby pressing the shaft portion 18 against the radially inner inner surface of the mounting hole 26.

[0026] 4(c), the claw portion 20 is further bent and the tip 20a is about to pass through the mounting hole 26. When the tip 20a passes through the mounting hole 26, the claw portion 20 returns to its original shape and catches on the edge of the mounting hole 26.

[0027] Because the claws 20 are formed to bend more easily than the shaft 18, when the mounting portion 14 is inserted into the mounting hole 26, the claws 20 bend first without breaking the shaft 18. When the claws 20 pass through the mounting hole 26, the action of the claws 20 restoring their original shape creates a clicking sensation, allowing the worker to recognize that assembly is complete.

[0028] When the claw portion 20 contacts the radially outer inner surface of the mounting hole 26 and the shaft portion 18 contacts the radially inner inner surface of the mounting hole 26, the claw portion 20 bends significantly, resulting in a strong clicking sensation when restoring.

[0029] The protruding portion 16, the shaft portion 18 and the claw portion 20 are set so that the protruding portion 16 is most flexible and the shaft portion 18 is least flexible.

[0030] The protruding portion 16 shown in Fig. 3 has a base end that connects to the ring portion 12 and a tip end that connects to the shaft portion 18. As shown in Fig. 1, the protruding portion 16 is narrower at the tip end than at the base end, and the circumferential width of the base end of the protruding portion 16 is greater than the circumferential width of the tip end of the protruding portion 16. This makes the tip end of the protruding portion 16 more flexible, thereby reducing the load applied to the ring portion 12 from the mounting portion 14. In addition, when the seal ring 10 is molded in a mold, this makes it easier for the rubber material to reach the mounting portion 14 from the ring portion 12.

[0031] The present invention is not limited to the above-described embodiments, and various modifications such as design changes may be made to the embodiments based on the knowledge of those skilled in the art, and such modified embodiments may also be included within the scope of the present invention.

[0032] The present invention relates to a seal ring having a mounting portion for mounting to a mounting member, and a retaining structure for the seal ring.

[0033] 10 Seal ring, 12 Ring portion, 12a Outer periphery, 14 Mounting portion, 16 Protruding portion, 18 Shaft portion, 20 Claw portion, 20a Tip, 22 Connecting pipe, 24 Flange portion, 26 Mounting hole, 26a Tapered surface, 28 Groove portion.

Claims

1. A seal ring comprising: a ring portion formed in an annular shape; and mounting portions formed on the ring portion and inserted into mounting holes formed in a mounting member, wherein the mounting portions have: a protrusion portion protruding radially outward from the outer periphery of the ring portion; a shaft portion connected to the protrusion portion and extending along the central axial direction of the ring portion; and a claw portion protruding only radially outward from the shaft portion and adapted to hook onto the edge of the mounting hole.

2. A seal ring as described in claim 1, characterized in that the circumferential width of said claw portions is smaller than the length of said claw portions protruding from said shaft portion.

3. A seal ring as described in claim 1 or 2, characterized in that the circumferential width of said shaft portion is smaller than the radial width of said shaft portion.

4. A seal ring as claimed in claim 1 or 2, characterized in that the protruding portion is formed to be more flexible than the claw portion.

5. A seal ring as described in claim 1 or 2, characterized in that when the mounting portion is attached to the mounting hole, the claw portion comes into contact with the radially outer inner surface of the mounting hole, causing the tip side of the claw portion to bend closer to the shaft portion, and the shaft portion is pressed against the radially inner inner surface of the mounting hole.

6. A seal ring retaining structure comprising: a connecting pipe having a flange portion; and a seal ring attached to the flange portion, the ring portion being formed in an annular shape and fitted into an annular groove formed in the flange portion; and mounting portions being formed on the outer periphery of the ring portion and being inserted into mounting holes formed in the flange portion radially outside the groove, the mounting portions having a protrusion protruding radially outward from the outer periphery of the ring portion, a shaft portion connected to the protrusion and extending along the central axial direction of the ring portion, and a claw portion protruding only radially outward from the shaft portion and adapted to hook onto the edge of the mounting hole.

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