Cylindrical bearing for fishing reel

Abstract

To provide a cylindrical bearing for a fishing reel which eliminates a possibility that salt particles, rust, or the like are generated in a void inside the bearing, and which, even if salt particles are generated due to intrusion and drying of saltwater, can grind the salt particles by sliding contact between an outer cylindrical surface and an inner cylindrical surface, thereby avoiding deterioration of rotational performance of a rotating shaft.SOLUTION: The cylindrical bearing for a fishing reel includes: a hollow cylindrical outer ring 10 having an inner ring accommodation portion 13 having a cylindrical surface of a required size; an inner ring 20 that has two annular ridge portions 22, 23 on an outer peripheral surface thereof and is rotatably accommodated in the inner ring accommodation portion 13 of the outer ring 10 with a loose fit engagement between the two annular ridge portions 22, 23; an O-ring 30 that is fitted and clamped in a circumferential groove between the two annular ridge portions 22, 23 and is in close contact with an inner peripheral surface of the outer ring 10; and axial movement restricting means 40, 18 that restrict axial movement of the inner ring 20 within the outer ring 10, where the outer ring 10 is made of polyether ether ketone and the inner ring 20 is made of brass.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cylindrical bearing for a fishing reel. [Background technology]

[0002] Fishing reels typically have a structure in which the rotating shaft of the spool that winds the fishing line is supported by a ball bearing. A ball bearing is made up of a combination of balls, a retainer, an inner ring, and an outer ring, with the rotating shaft passing through the center hole (shaft hole) of the inner ring and the outer ring housed in a bearing hole in the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-130086 Summary of the Invention [Problem to be solved by the invention]

[0004] Fishing reels, in which the rotating shaft of the spool is supported by a ball bearing, have a problem in that if salt particles or rust or the like form in the gap inside the bearing, the rotation of the rotating shaft is hindered, hindering long-distance casting.

[0005] The object of the present invention is to provide a cylindrical bearing for fishing reels that is free from the risk of salt particles or rust forming in the gaps inside the bearing, and that, even if salt particles do form due to the intrusion and drying of saltwater, can be ground down by the sliding contact between the outer cylindrical surface and the inner cylinder, thereby preventing a decrease in the rotational performance of the rotating shaft. [Means for solving the problem]

[0006] The cylindrical bearing for a fishing reel according to a first aspect of the present invention is a cylindrical bearing for a fishing reel that is interposed between the shaft and housing of a fishing reel component, and comprises: a hollow cylindrical outer ring having a large-diameter hole of a required size that supports an inner ring accommodating portion; an inner ring having two annular ridges facing outward from its outer circumference, the two annular ridges being rotatably accommodated in the inner ring accommodating portion of the outer ring with a loose-fitting intersecting fit; an O-ring that is fitted into the circumferential groove between the two annular ridges and that is in close contact with the inner surface of the outer ring; and axial direction restricting means that restricts axial movement of the inner ring within the outer ring, wherein the outer ring is made of polyether ether ketone and the inner ring is made of brass.

[0007] The cylindrical bearing for a fishing reel according to the second aspect of the present invention has the same configuration as the first aspect of the invention, but is also configured such that the axial direction regulating means is carried by a wall portion that causes one end face of the inner ring to abut against the inner ring accommodating portion at the rear side, and an annular lid fixed to the outer ring so as to close the opening of the inner ring accommodating portion.

[0008] The cylindrical bearing for a fishing reel according to the third aspect of the present invention has the same configuration as the first aspect of the invention, but is also configured such that the axial direction restricting means is carried by two annular lids fixed to the outer ring so as to close the openings on both sides of the inner ring accommodating section.

[0009] The cylindrical bearing for a fishing reel according to the fourth aspect of the present invention has the same configuration as the first aspect of the invention, but is also configured such that the inner ring has an axial hole formed through the center and two small-diameter boss portions formed at both ends of the outer surface, sandwiching the two annular protrusion portions.

[0010] The cylindrical bearing for a fishing reel according to the fifth aspect of the present invention has the same configuration as the first aspect of the present invention, but also has the following features: The O-ring is made of any one of nitrile rubber, hydrogenated nitrile rubber, silicone rubber, fluororubber, and acrylic. [Effects of the Invention]

[0011] According to the present invention, because both sides of the space where the outer ring and inner ring rotate together are closed, there is no risk of salt particles or rust forming in the gap inside the bearing, and even if salt particles are formed due to the intrusion and drying of saltwater, they can be ground down by the sliding contact that occurs as the cylindrical surface of the outer ring rotates and rotates with the cylindrical surfaces of the two annular ridges of the inner ring, making it possible to provide a cylindrical bearing for fishing reels that prevents a decrease in the rotational performance of the rotating shaft. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view of a cylindrical bearing for a fishing reel according to an embodiment of the present invention, the cross-sectional view coinciding with a plane including the center line of the cylindrical bearing. [Figure 2] 2(A) and 2(B) are diagrams for explaining the shapes of the outer ring and the inner ring, which are components of the cylindrical bearing for a fishing reel shown in FIG. [Figure 3] 3(A)-(D) are dimensional diagrams showing an example of each component of the cylindrical bearing for a fishing reel shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cylindrical bearing for a fishing reel according to an embodiment of the present invention will be described below with reference to the drawings.

[0014] The cylindrical bearing for a fishing reel according to the present invention is interposed between the shaft of a component of the fishing reel and the housing. [Overall configuration] As shown in FIG. 1, the cylindrical bearing 1 for a fishing reel in this embodiment comprises an outer ring 10 and an inner ring 20 combined to form a rotational pair, an O-ring 30 that is in close contact with the rotational pair surface of the outer ring 10 and the inner ring 20, and axial direction restriction means for the inner ring 20 (a wall portion 18 and an annular lid 40, which will be described later).

[0015] [Outer ring 10] As shown in Figure 1, the outer ring 10 is a hollow cylinder with a large-diameter hole of the required size for supporting the inner ring receiving section. The outer ring 10 is a molded article of polyether ether ketone (PEEK). Polyether ether ketone has high tensile strength, is highly resistant to acids, alkalis, and organic solvents, is flame-retardant, heat-resistant, and has excellent fatigue and wear resistance, making it suitable as a metal replacement or for use in harsh environments.

[0016] 2, the outer ring 10 has a cylindrical outer surface 11 of a required size, an inner ring accommodating portion (large diameter hole) 13 recessed to a required depth from one end face 12, a small diameter hole 16 of a required size formed between the other end face 14 and a back wall surface 15 of the inner ring accommodating portion 13, and a circumferential groove 17 formed in an annular shape near the opening of the inner ring accommodating portion 13. The cylindrical outer surface 11, inner ring accommodating portion 13, small diameter hole 16, and circumferential groove 17 are all concentric with one another.

[0017] [Inner circle 20] As shown in Figure 1, inner ring 20 has two annular ridges 22, 23 facing outward from its outer periphery, and these two annular ridges 22, 23 are rotatably housed in inner ring housing portion 13, which is a large-diameter hole in outer ring 10, with a loose fit. Inner ring 20 is made of brass (an alloy of copper and zinc), which can be machined with high precision and has high corrosion resistance to seawater.

[0018] 2, the inner ring 20 has a shaft hole 21 formed through its center, two annular ridges 22, 23 spaced apart and formed in the middle of its outer surface to be received in the large-diameter hole 13 of the outer ring 10, an annular recess 24 between the two annular ridges 22, 23, and two small-diameter bosses 25, 26 formed at both ends of its outer surface, sandwiching the two annular ridges 22, 23. The bosses 25, 26 of the inner ring 20 increase the length of the shaft hole 21, ensuring the length to accommodate the fishing reel shaft. The shaft hole 21 is also provided with multiple oil grooves 27, which can store, for example, silicone oil.

[0019] [O-ring 30] O-ring 30 is made of synthetic rubber such as nitrile rubber, hydrogenated nitrile rubber, silicone rubber, fluororubber, or acrylic, and has a circular cross section. O-ring 30 is fitted into the circumferential groove between the two annular ridges, and is in close contact with the inner circumferential surface of outer ring 10 while generating a resilient force.

[0020] When the fishing reel handle is turned by hand, an external force acts on the O-ring 30, compressing it radially on one side and restoring and expanding it on the other side, and this uneven state moves circumferentially, causing the inner ring 20 to rotate in contact with the outer ring 10 (or the outer ring 10 to rotate in contact with the inner ring 20). On the compressed side, the O-ring 30 has the function of reducing the sliding pressure between the inner peripheral surface of the outer ring 10 and the outer peripheral surfaces of the two annular ridge portions 22, 23 of the inner ring 20.

[0021] [Axial direction regulating means] As shown in Fig. 2, one end face of the inner ring 20 abuts against a wall portion 18 having a small diameter hole 16 at the rear side of the inner ring accommodating portion (large diameter hole) 13 of the outer ring 10, and the other end face abuts against the annular lid 40, thereby restricting axial movement within the outer ring 10. Therefore, in this embodiment, the above-mentioned axial direction restriction means is carried by the wall portion 18 and the annular lid 40. The wall portion 18 and the annular lid 40 restrict the inner ring 20 from moving in the axial direction without applying clamping pressure to both end faces of the inner ring 20.

[0022] The axial direction restricting means is an annular lid 40 made of plastic, which is forcibly fitted into the circumferential groove 17 with the two annular protrusions 22, 23 of the inner ring 20 and the O-ring 30 housed within the large diameter hole 13 of the outer ring 10.

[0023] [Modification of axial direction restriction means] The axial direction restricting means may be a threaded hole instead of the circumferential groove 17, and the annular lid 40 may be screwed into it. Alternatively, the annular lid 40 may be fixed to the outer ring 10 with an adhesive. Furthermore, a configuration in which the wall portion 18 is not present in the outer ring 10 may be adopted, specifically a configuration in which the inner ring accommodating portion (large diameter hole) 13 penetrates the outer ring 10 from one end to the other, the two annular ridge portions 22, 23 of the inner ring 20 are positioned in the axial center of the inner ring accommodating portion 13, two circumferential grooves 17 are provided at positions sandwiching the annular ridge portions 22, 23, and the annular lid 40 is forcibly fitted into each of the circumferential grooves 17.

[0024] According to the embodiment of the cylindrical bearing for fishing reels 1 having the above configuration, the two annular ridge portions 22, 23 of the inner ring 20 and the O-ring 30 are housed in the inner ring housing portion 13 of the outer ring 10, and both sides of the tiny annular space between the inner peripheral surface of the inner ring housing portion 13 and the outer peripheral surfaces of the annular ridge portions 22, 23 are blocked by the axial direction restricting means 18, 40. This configuration eliminates the risk of salt particles or rust or the like forming in the annular space, and even if salt particles are formed due to the intrusion and drying of saltwater, they can be ground down by the sliding contact that occurs as the cylindrical surface of the outer ring and the cylindrical surfaces of the two annular ridge portions of the inner ring rotate, thereby preventing a decrease in the rotational performance of the rotating shaft.

[0025] 3 shows example dimensions of outer ring 10, inner ring 20, O-ring 30, and annular lid 40. When no force is acting between outer ring 10 and inner ring 20, the resilience of O-ring 30 maintains an equal gap between the rotationally paired circumferential surfaces of outer ring 10 and inner ring 20. That is, when the gap between the inner circumferential surface of inner ring accommodating portion 13 and the outer circumferential surfaces of annular ridge portions 22, 23 is maintained evenly, it is preferably 0.1 to 0.2 mm, for example, and the axial dimension of the inner circumferential surface of inner ring accommodating portion 13 is preferably 0.1 to 0.2 mm larger than the axial dimension of annular ridge portions 22, 23, for example. [Explanation of symbols]

[0026] 1... Cylindrical bearing for fishing reel, 10...outer ring, 11...Cylinder outer surface, 12...One end surface, 13...inner ring housing portion, 14...Other end surface, 15...Back wall, 16...Small diameter hole, 17...peripheral groove, 18...Wall part, 20...inner circle, 21...shaft hole, 22, 23... Annular protrusion portion, 24...Circular groove portion, 25,26...Boss section, 27...Oil groove, 30...O-ring, 40...Ring-shaped lid.

Claims

1. A cylindrical bearing for a fishing reel interposed between a shaft of a component of the fishing reel and a housing, a hollow cylindrical outer ring having a large diameter hole of a required size that supports an inner ring accommodating portion; an inner ring having two annular ridge portions extending outwardly on an outer periphery thereof, the two annular ridge portions being rotatably received in the inner ring receiving portion of the outer ring with a loose-fitting intersecting fit; an O-ring that is fitted so as to be sandwiched in the circumferential groove between the two annular protrusions and that is in close contact with the inner circumferential surface of the outer ring; an axial restriction means for restricting axial movement of the inner ring within the outer ring, The outer ring is made of polyether ether ketone, and the inner ring is made of brass. A cylindrical bearing for a fishing reel, characterized in that:

2. 2. The cylindrical bearing for a fishing reel according to claim 1, wherein the axial restriction means is supported by a wall portion of the outer ring that abuts and stops one end face of the inner ring at the rear side of the inner ring accommodating portion, and an annular lid fixed to the outer ring so as to close the opening of the inner ring accommodating portion.

3. 2. The cylindrical bearing for a fishing reel according to claim 1, wherein the axial direction restricting means is carried by two annular lids fixed to the outer ring so as to close both sides of the opening of the inner ring accommodating portion.

4. 2. The cylindrical bearing for a fishing reel according to claim 1, wherein the inner ring has an axial hole formed through the center and two small-diameter boss portions formed at both ends of the outer surface, sandwiching the two annular protrusion portions.

5. 2. The cylindrical bearing for a fishing reel according to claim 1, wherein the O-ring is made of any one of nitrile rubber, hydrogenated nitrile rubber, silicone rubber, fluororubber, and acrylic.

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