JP5677211B2 - Fishing reel - Google Patents

Description

  The present invention relates to a fishing reel in which a magnetic fluid seal is integrally provided on a bearing.

  2. Description of the Related Art Conventionally, a fishing reel in which a magnetic seal mechanism using a magnetic fluid is applied to a bearing is known. For example, in Patent Document 1, seawater, sand, foreign matter, or the like adheres to or enters a ball bearing that rotatably supports a drive shaft (spool shaft) that is rotationally driven in accordance with a rotation operation of a fishing line winding handle. Magnetic seal formed by holding a magnetic fluid between the magnetic holding ring constituting the magnetic circuit and the drive shaft so that the magnetic bearing does not deteriorate (that is, the rotational performance of the ball bearing is not reduced by waterproofing and dustproofing). A mechanism is provided close to the ball bearing.

JP 2003-319742 A

  However, in Patent Document 1, since a magnetic seal mechanism separate from the bearing is provided close to the bearing, a space for sealing is required in addition to the installation space of the bearing, as in the case of a conventional elastic seal or the like. . In particular, since fishing reels have a large number of bearings, if a magnetic seal mechanism is provided for each of these bearings, the entire reel is increased in size. Further, since it is necessary to assemble a magnetic seal mechanism separately from the assembling of the bearing, the assembling property is poor, laborious, and the productivity is not good (that is, the assembling work time is increased and the manufacturing cost is increased). Furthermore, in Patent Document 1, since the magnetic fluid is placed in direct contact with the drive shaft, the drive shaft must be formed of a magnetic material, and the degree of freedom in selecting the material for the drive shaft is limited. That is, options for satisfying the required quality required for the drive shaft are limited.

  The present invention has been made by paying attention to the above-mentioned circumstances, and the object is to save space, to have a high degree of freedom in material selection, and to a magnetic property with good assemblability (workability). The object is to provide a fishing reel comprising a bearing with a fluid seal.

In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that the fishing line is wound around the spool supported by the reel body by the rotating operation of the handle coupled to the winding drive mechanism built in the reel body. A fishing reel in which a drive shaft that is rotationally driven by the operation of the handle is rotatably supported by a bearing, wherein at least one of the bearings is an inner ring made of a magnetic material, and an outer ring made of a magnetic material, a bearing body made of a rolling elements inserted rollably through between the inner ring and the outer ring is held together with the bearing body, the interior of the bearing body form a magnetic circuit between said annulus and a magnetic fluid seal for sealing the said magnetic fluid seal, a magnet that forms a magnetic circuit between the inner wheel, a holding plate for holding the magnet, and the holding plate and the inner ring Magnetic current retained between Ri consists with, characterized in that a O-ring between said magnet is held in the side by the holding plate and the reel body for supporting said outer ring of said bearing body.

According to the first aspect of the present invention, since the bearing main body and the magnetic fluid seal for sealing the inside of the bearing main body to the outside are integrated, the seal is separated from the installation space of the bearing. It is no longer necessary to secure space. Therefore, a seal and a bearing can be installed in a small space, and space saving can be achieved. Adopting such a configuration in fishing reels that have a large number of bearings and a high need for seals eliminates the need to provide a magnetic seal mechanism separately from the bearings, thereby reducing the size of the entire reel. Can be beneficial. In addition, since it is not necessary to assemble a magnetic seal mechanism separately from the incorporation of the bearing, the assemblability (workability) is good and the productivity can be improved (that is, the assembly work time can be shortened and the manufacturing cost can be reduced). Further, in this configuration, the magnetic fluid seal, rather than forming a magnetic circuit between the members other than the bearing body, for forming a magnetic circuit between the inner ring of the bearing body, the other The degree of freedom in selecting the material of the member is not limited (the drive shaft or the like need not be formed of a magnetic material), and free material selection that satisfies the required quality required for the other member can be ensured (the other member) Can choose the most suitable material). In addition, when the bearing with the magnetic fluid seal having such a configuration is provided on the spool shaft, since the waterproof is achieved, it is possible to provide a hole in the spool, and weight reduction due to the hole reduces the weight around the spool shaft of the spool. The moment of inertia can be reduced, and the spool-free performance can be improved by a synergistic effect with the decrease in rotational resistance by the magnetic fluid seal. In the above configuration, the "the annulus between the magnetic fluid held between the holding plate", as other inclusions other than magnetic fluid between the inner ring and the holding plate is present Including. That is, even if there is something other than the magnetic fluid between the inner ring and the holding plate, even if the magnetic fluid is present between the magnet and the inner wheel which is held, for example, the holding plate, resulting in the inner ring Or as long as magnetic fluid exists in the area | region between an outer ring | wheel and a holding | maintenance board, it is included in the scope of the present invention.

  The invention according to claim 2 is the invention according to claim 1, further comprising holding means for holding the magnetic fluid seal on the bearing body.

  According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and the integration of the bearing body and the magnetic fluid seal can be ensured, and the magnetic fluid seal The handleability of the bearing with bearing is improved.

According to a third aspect of the invention, in the invention of the first or second aspect, the axial length of the inner ring is set shorter than the axial length of the outer ring . The magnetic fluid seal is incorporated in a seal housing space formed in such a manner as to face the inner surface of the inner ring in the radial direction in a state where the holding plate is in axial contact with the end surface of the outer ring. Features.

According to the third aspect of the invention, the same effect as that of the first or second aspect of the invention can be obtained, and the axial length of the inner ring is set shorter than the axial length of the outer ring. As a result, a magnetic fluid seal is incorporated in the seal housing space formed in the bearing body, that is, in the bearing body, so that the size of the bearing body is increased without increasing the size of the bearing body. The integration of the bearing main body and the magnetic fluid seal can be realized without the need for this. Further, the magnetic fluid seal for incorporation so as to face each other in the inner ring of the inner surface in the radial direction in a state where the holding plate is brought into contact in the axial direction on the end face of the outer ring, holding the end face and the inner surface of the inner and outer rings It can be used for holding the plate and holding the magnetic fluid, and holding the magnetic fluid seal can be realized in a lump in the seal housing space. That is, the efficient and effective use of the space can realize the integration and miniaturization of the bearing body and the magnetic fluid seal in a simple form. Further, since the magnetic fluid is held inside the bearing body, there is no possibility that the magnetic fluid leaks outside.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the holding plate is composed of a pair of electrode plates that hold the magnet from both sides. And

  According to the fourth aspect of the present invention, the same effect as that of any one of the first to third aspects of the invention can be obtained, and a reliable and stable holding of the magnet can be ensured.

  The invention according to claim 5 further includes a sealing plate for sealing the inside of the bearing body with respect to the outside in the invention according to claim 4, and the sealing plate is one of the electrode plates. It is also characterized by serving.

  According to the invention described in claim 5, the same effect as that of the invention described in claim 4 can be obtained, and the sealing plate also serves as one of the electrode plates. Can be further promoted.

The invention of claim 6 is the invention according to any one of claims 1 to 3, the magnetic fluid between the inner ring and the magnet is held by the holding plate is held It is characterized by being.

  According to the invention described in claim 6, the same effect as that of the invention described in any one of claims 1 to 3 can be obtained.

  The invention according to claim 7 is the invention according to any one of claims 1 to 3, wherein the ring-shaped magnet is fixed to the holding plate so as to fix the ring-shaped magnet. A recess is formed.

  According to the seventh aspect of the invention, the same effect as that of any one of the first to third aspects of the invention can be obtained, and the magnet is fixed to the ring-shaped recess of the holding plate. Therefore, the holding plate can save space without being thickened in the axial direction when holding the ring-shaped magnet.

  According to the present invention, it is possible to provide a fishing reel including a bearing with a magnetic fluid seal that can save space, has a high degree of freedom in material selection, and has a good assembling property (workability).

1 is a cross-sectional view of a fishing reel (double-bearing type reel) including a bearing with a magnetic fluid seal according to a first embodiment of the present invention. It is an expanded sectional view of the principal part of the fishing reel of FIG. It is an expanded sectional view of the A section of FIG. It is an expanded sectional view of the B section of FIG. It is an expanded sectional view which shows the 1st modification of FIG. It is an expanded sectional view which shows the 2nd modification of FIG. It is an expanded sectional view which shows the 3rd modification of FIG. It is an expanded sectional view which shows the 4th modification of FIG. It is an expanded sectional view which shows the 5th modification of FIG. It is sectional drawing of a fishing reel (spinning reel) provided with the bearing with a magnetic fluid seal which concerns on the 2nd Embodiment of this invention. It is sectional drawing which follows the CC line of FIG. It is a principal part expanded sectional view of FIG.

  Hereinafter, a fishing reel according to the present invention in which a magnetic fluid seal is integrally provided on a bearing will be described in detail with reference to the accompanying drawings.

  1 to 3 show a fishing reel according to a first embodiment of the present invention in which a magnetic fluid seal is integrally provided on a bearing. FIG. 1 is a cross-sectional view of a dual-bearing type reel as a fishing reel according to the present embodiment. As shown in the figure, a reel body 1 of a dual-bearing type reel includes left and right frames 2a and 2b and left and right side plates 3a and 3b mounted on the left and right frames 2a and 2b with a predetermined space. Between the left and right frames 2a and 2b (left and right side plates 3a and 3b), a spool shaft 5 as a drive shaft is provided via a bearing in which a magnetic fluid seal is integrally provided, that is, bearings 30 and 30A with a magnetic fluid seal. A spool 6 around which a fishing line is wound is attached to the spool shaft 5.

  A handle shaft 9 on which a handle 8 is mounted is rotatably supported on the right side plate 3b side. A winding drive mechanism is connected to the handle shaft 9, and the spool 6 is driven to rotate through the winding drive mechanism by rotating the handle 8. The handle shaft 9 can be rotated only in the fishing line winding direction by a one-way clutch 10 interposed between the handle shaft 9 and the right side plate.

  The winding drive mechanism includes a drive gear 12 that is rotatably supported on the handle shaft 9 via a drag mechanism, and a pinion 13 that meshes with the drive gear 12. The pinion 13 is rotatably supported via a bearing 82 and is configured to be connected to and disconnected from the spool shaft 5 via a known clutch mechanism. In the clutch ON state, the rotational driving force of the handle 8 is set. Is transmitted to the spool 6 via the drive gear 12 and the pinion 13, and in the clutch-off state, the drive force transmission state is canceled and the spool 6 is brought into a free rotation state. The clutch operation described above is performed by operating an operation lever (not shown) protruding from the reel body 1.

  A level wind mechanism 20 is provided in front of the spool 6 between the left and right plates 3a and 3b. The level wind mechanism 20 reciprocates left and right in front of the spool 6 and is supported between a fishing line guide 21 having an insertion hole through which a fishing line is inserted and the left and right side plates 3a and 3b, and an endless cam groove 23a on the outer periphery. The worm shaft 23 is formed.

  The worm shaft 23 is rotatably supported between the left and right frames via a bearing 80 and is rotatably accommodated in a cylindrical member 25 in which a through hole is formed along the axial direction. The engagement pin held by the fishing line guide body 21 is engaged with the endless cam groove 23a to reciprocate the fishing line guide body 21 left and right. Further, the fishing line guide 21 is supported by a guide pillar (not shown) supported between the left and right frames so as to be prevented from rotating around the worm shaft 23 when reciprocating.

  A gear 90 that meshes with a gear 12 a that is connected to the drive gear 12 in the axial direction so as to rotate together with the drive gear 12 is provided at the end on the right side plate side of the worm shaft 23. The gear 90 is inputted with a rotational driving force by a winding operation of the handle 8 via the handle shaft 9, the driving gear 12 and the gear 12 a, and the rotational driving force is outputted to the worm shaft 23. .

  Further, in the present embodiment, the right side plate 3b of the reel body 1 has a concave recess 50 in which the handle shaft 9 as a drive member that rotates in conjunction with the operation of the handle 8 is partially received and supported by the bearing 49. Is formed. The accommodation recess 50 accommodates and holds the one-way clutch 10 of the above-described reverse rotation prevention mechanism in a positioned state (the reverse rotation prevention mechanism is provided in the accommodation recess 50).

  Further, in this configuration, an operating body 71 constituting a known drag mechanism 70 is screwed to the right end portion of the handle shaft 9. When the operating body 71 is rotated, the first pressing body 73, which is a collar member that is fitted to the handle shaft 9 so as to be axially movable and integrally rotatable, moves in the axial direction, via the disc spring 75. Then, the second pressing body 77 serving also as the inner ring of the one-way clutch 10 is pressed, the friction member 78 is pressed with a desired pressing force, and a braking force is generated between the handle shaft 9 and the gear 12a.

  Next, with reference to FIG. 3 and FIG. 4, the magnetic fluid seal bearings 30 and 30 </ b> A according to this embodiment for rotatably supporting the spool shaft 5 will be described in detail. Here, FIG. 3 is an enlarged cross-sectional view of part A of FIG. 2, and FIG. 4 is an enlarged cross-sectional view of part B of FIG.

  As shown in FIG. 3, the first bearing 30 with a magnetic fluid seal that rotatably supports the left end of the spool shaft 5 includes a bearing body 32 and a magnetic fluid seal 34 that seals the inside of the bearing body 32. These are configured as an integral unit. The bearing main body 32 is arranged on the outer ring 36 made of a magnetic material that fits and supports the outer peripheral surface of the spool shaft 5, the outer ring 36 made of a magnetic material, the outer side of the inner ring 31, and the inner side of the outer ring 36. It consists of a pair of left and right sealing plates 33 for sealing the inside of the main body 32 with respect to the outside, and a rolling element 35 interposed between the inner ring 31 and the outer ring 36 so as to be able to roll. The rolling element 35 is positioned between the left and right sealing plates 33 and is held by an inner ring 31, an outer ring 36, and a retainer (not shown). On the other hand, the magnetic fluid seal 34 is held integrally with the bearing body 32 and forms a magnetic circuit with the inner ring 31 to seal the inside of the bearing body 32. Specifically, the magnetic fluid seal 34 is disposed so as to surround the inner ring 31 with a predetermined gap, and holds the magnet 39 and a ring-shaped magnet 39 that forms a magnetic circuit with the inner ring 31. The holding plate, which in this embodiment is held between a pair of ring-shaped electrode plates (magnetic rings) 37 and 38 as holding plates for holding the magnet 39 from both sides, and the inner ring 31 and the electrode plates 37 and 38. Magnetic fluid 40.

  In the present embodiment, the magnetic fluid seal 34 is incorporated in a seal housing space S that is efficiently and effectively formed in the bearing body 32. Specifically, in the present embodiment, the axial length of the outer ring 36 (the axial direction is indicated by an arrow P in FIG. 3) is set shorter than the axial length of the inner ring 31, and this The magnetic fluid seal 34 has one electrode plate 37 abutted against the side end surface 36 a of the outer ring 36 in the axial direction in the seal housing space S formed in a step shape in the bearing body 32 by such dimension setting. In the state and in a state where both the electrode plates 37 and 38 are opposed to the outer surface 31a of the inner ring 31 (the surface facing the rolling element 35) in the radial direction, the whole (including the magnet 39 and both electrode plates 37 and 38) is included. Are incorporated so as to be completely accommodated in the seal housing space S. Therefore, in this arrangement, the magnetic fluid 40 held between the inner ring 31 and each of the electrode plates 37 and 38 comes into contact with the outer surface 31 a of the inner ring 31. As described above, holding the magnetic fluid 40 on the inner ring 31 side instead of the outer ring 36 side reduces the amount of the magnetic fluid 40 used in view of the fact that the outer diameter of the inner ring 31 is smaller than that of the outer ring 36. This is preferable. In addition, since the inner ring 31 side rotates, the influence of the centrifugal force of the magnetic fluid 40 can be reduced, and it becomes easy to stably hold at a predetermined position.

Here, the pole plates 37 and 38 hold the ring-shaped magnet 39 while holding the ring-shaped magnet 39 so that a recess 41 is formed along the circumferential direction on the inner side and between the magnetic fluid 40 and the outer surface 31 a of the inner ring 31. It arrange | positions so that the slight clearance gap G for hold | maintaining may be ensured. In this case, a waterproof O-ring 92 is interposed between the magnet 39 and the left side plate 3a. Further, as indicated by phantom lines in FIG. 3, an O-ring 93 may be separately arranged inside the inner ring 31, but normally, since the spool shaft 5 and the bearing are assembled with high accuracy, In many cases, it is not necessary to provide the O-ring 93. Further, the inner ring 31 as a magnetic body is made of an iron-based material, for example, steel, SUS430, SUS440C, SUS630, and the like, so that the magnets 39 hold the electrode plates 37 and 38 and the inner ring 31. A magnetic circuit is formed between the two. The axial length of the facing portion of the inner ring 31 facing the electrode plates 37 and 38 is long enough to generate the magnetic circuit (long enough to stably hold the magnetic fluid 40). The electrode plates 37 and 38 are preferably formed to be slightly longer than the axial length of the electrode plates 37 and 38 so that the electrode plates 37 and 38 are covered. Further, the magnetic fluid 40 is formed by dispersing magnetic fine particles such as Fe ₃ O ₄ in a surfactant and base oil, and has a characteristic of reacting when the magnet is brought close to the magnet. . Therefore, as shown in FIG. 3, the magnetic fluid 40 is stably held in the gap G by the magnetic circuit formed by the magnet 39, the electrode plates 37 and 38 holding the magnet 39, and the inner ring 31. Thus, the inside of the bearing body 32 is securely sealed from the outside.

  In addition, as a holding means for holding the magnetic fluid seal 34 on the bearing main body 32, various means such as adhesion, welding, and other holding members can be considered. For example, the electrode plates 37 and 38 may be bonded to the outer ring 36 and the left side plate 3a, or a press-fit support by an O-ring 92 or a retaining ring may be used.

  As shown in FIG. 4, the second magnetic fluid seal bearing 30 </ b> A that rotatably supports the right end of the spool shaft 5 includes an outer ring 36 in addition to the configuration of the second magnetic fluid seal bearing 30. The holding body 97 is fitted on the outer periphery of the. The holding body 97 extends in the axial direction longer than the outer ring 36 on the magnetic fluid seal 34 side, and the magnetic fluid seal 34 is removed from the bearing body 32 in the groove 98 on the inner surface of the extending portion 97a. A hexagonal ring (holding means) 99 is attached to prevent this (holding the magnetic fluid seal 34 against the bearing body 32). By such a holding means 99, the integration of the bearing body 32 and the magnetic fluid seal 34 can be ensured, and the handleability of the bearing 30A with a magnetic fluid seal is improved. A waterproof O-ring 96 is interposed between the outer peripheral surface of the holding body 97 and the right frame 2b.

  As described above, according to the magnetic fluid seal bearings 30 and 30A of the present embodiment, the bearing main body 32 and the magnetic fluid seal 34 for sealing the inside of the bearing main body 32 to the outside are unitized as a unit. Therefore, it is not necessary to secure a space for sealing separately from the installation space for the bearing. Therefore, a seal and a bearing can be installed in a small space, and space saving can be achieved. In addition, since it is not necessary to assemble a magnetic seal mechanism separately from the incorporation of the bearing, the assemblability (workability) is good and the productivity can be improved (that is, the assembly work time can be shortened and the manufacturing cost can be reduced). Furthermore, in this embodiment, the magnetic fluid seal 34 does not form a magnetic circuit with other members (such as the spool shaft 5) other than the bearing body 32, but between the inner ring 31 of the bearing body 32. Since the magnetic circuit is formed, the degree of freedom of material selection of the other member is not limited, and free material selection that satisfies the required quality required for the other member can be ensured (the optimum material for the other member). Can be selected).

  Further, in the bearings 30 and 30 </ b> A with magnetic fluid seals of the present embodiment, the seal accommodation space S formed in the bearing body 32 by setting the axial length of the outer ring 36 shorter than the axial length of the inner ring 31. Since the magnetic fluid seal 34 is incorporated in the inside of the bearing body 32, the bearing body 32 and the magnetic body 32 are magnetic without increasing the size of the bearing body 32 or increasing the overall size of the bearings 30 and 30A. Integration with the fluid seal 34 can be realized. The magnetic fluid seal 34 is in a state where one of the pole plates 37 is in axial contact with the side end surface 36a of the outer ring 36, and both the pole plates 37 and 38 are connected to the outer surface 31a (the rolling elements 35 and 35) of the inner ring 31. Since the entire surface (the entire surface including the magnet 39 and both electrode plates 37 and 38) is completely fitted in the seal housing space S in a state of being opposed to the opposite surface) in the radial direction, the inner ring 31 and The end face and the inner surface of the outer ring 36 can be used for holding the electrode plates 37 and 38 and the magnetic fluid 40, and the magnetic fluid seal 34 can be held collectively in the seal housing space S. That is, the efficient and effective use of the space enables the integration and miniaturization of the bearing body 32 and the magnetic fluid seal 34 to be realized in a simple form. Furthermore, since the magnetic fluid 40 is held inside the bearing body 32, there is no possibility that the magnetic fluid 40 leaks outside.

  Furthermore, in this embodiment, since the magnetic fluid seal bearings 30 and 30A are applied to a fishing reel, even in a fishing reel having a large number of bearings and a high necessity for sealing, the bearings are separated from the bearings. Thus, it is not necessary to provide a magnetic seal mechanism, and the entire reel can be reduced in size. In addition, for the reasons described above, the reel can be easily assembled, and when a bearing with a magnetic fluid seal is provided on the spool shaft as in the present embodiment, the spool is provided with a hole, so that a hole is provided in the spool. Therefore, the moment of inertia around the spool shaft of the spool can be reduced by reducing the weight due to the hole, and the spool-free performance can be improved by a synergistic effect with the decrease in rotational resistance by the magnetic fluid seal.

  In the present embodiment, the magnetic fluid seal bearings 30 and 30A that rotatably support the spool shaft 5 have been described. However, the worm shaft 23, the handle shaft 9, and the pinion 13 as other drive shafts are rotated. The bearings 49, 80, and 82 that can be supported may also be configured as bearings 30 and 30A with magnetic fluid seals. In the above description, the inner ring 31 is formed of a magnetic material and forms a part of the magnetic circuit of the magnetic fluid seal 34. However, the outer ring 36 is formed of a magnetic material and the magnetic circuit of the magnetic fluid seal 34 is formed. A part may be formed.

  FIG. 5 shows a first modification of the bearing 30 with a magnetic fluid seal. As shown in the drawing, in the bearing 30 ′ with a magnetic fluid seal according to this modification, the sealing plate 33 also serves as one electrode plate 37 and the inner ring 31 so that the number of parts can be further reduced to further reduce the size. 3 is set to be shorter than that of FIG. 3 (so that it substantially matches the axial length of the outer ring 36) (generally, the material of the sealing plate 33 is SUS304 (JIS), which is a non-magnetic material. In this case, it is necessary to form the sealing plate 33 with a magnetic material. For example, it is preferable to use a plating finish of SUS430 (JIS) or SPCC (JIS)). Accordingly, the magnetic fluid 40 is held between the portion of the sealing plate 33 that also serves as one electrode plate 37 and the outer surface 31a of the inner ring 31, and the radially inner end of the other electrode plate 38 is pivoted. The magnetic fluid 40 is held between the side surface 31 b and the end surface of the bent end portion 38 a of the electrode plate 38. In such a configuration, not only the same effects as those of the first embodiment can be obtained, but also a large width of the magnet 39 can be secured in the same bearing dimensions as in FIG. 3, or the entire bearing 30 ′ can be secured. Can be reduced in size (space saving). Moreover, the structure which remove | eliminated the sealing plate 33 by the side of a seal | sticker may be sufficient. (In that case, it becomes a form close to a fifth modification of FIG. 9 described later.)

  FIG. 6 shows a second modification of the bearing 30 with a magnetic fluid seal. This second modification is a further modification of the first modification. That is, as shown in the figure, in the magnetic fluid seal bearing 30 ″ according to this modification, the part of the sealing plate 33 that also serves as one electrode plate 37 is the part shown in FIG. 5 (or the part on the other side of the sealing plate 33). Further, the magnetic fluid 40 can be held between the portion of the sealing plate 33 and the outer surface 31a of the inner ring 31 with a sufficient amount. The rest of the configuration is the same as that of the magnetic fluid seal bearing 30 ′, so that the same effects as those of the first embodiment and the first modification thereof can be obtained.

  FIG. 7 shows a third modification of the bearing 30 with a magnetic fluid seal. The magnetic fluid seal bearing 30 described above is provided outside the sealing plate 33, but the magnetic fluid seal bearing 301 according to this modification is provided inside the sealing plate 33. Further, in the bearing 30 with magnetic fluid seal described above, the pole plates 37 and 38 are inserted between the inner ring 31 and the left side plate 3a. It is inserted between the inner ring 31 and the outer ring 36 having the same directional length. Other configurations are the same as those in the first embodiment. Therefore, the same operational effects as those of the first embodiment can be obtained, and the magnetic fluid seal can be prevented from coming off with a general-purpose part and the space can be saved as compared with the embodiment of FIG. Further, the pole plate 38 is excluded, and the sealing plate 33 is disposed at the position along the magnet 39 to hold the magnetic fluid 40 between the sealing plate 33 and the inner ring 31 as in the modification of FIG. Also good.

FIG. 8 shows a fourth modification of the bearing 30 with a magnetic fluid seal. In the magnetic fluid seal bearing 302 according to this modification, the length relationship between the inner ring 31 and the outer ring 36 is opposite to that of the first embodiment. That is, the axial length of the inner ring 31 is set to be shorter than the axial length of the outer ring 36, and a characteristic configuration is provided in the seal housing space S formed in a stepped shape in the bearing body 32 by such dimension setting. A magnetic fluid seal 34A is incorporated. Specifically, the magnetic fluid seal 34 </ b> A includes a holding plate 300 that is fixed to the inner surface of the extending portion 36 a of the outer ring 36 that extends in the axial direction with respect to the inner ring 31 and holds the magnet 39. In this case, the holding plate 300 only needs to have a structure that generates a magnetic region between the side end surface 31b of the inner ring 31. In this modification, the elastic material is reinforced with brass, aluminum alloy, resin, or metal. It is formed in a ring shape having an opening region 300a in the center, and is fixed to the inner surface of the extending portion 36a and extends in a direction perpendicular to the axial direction. A ring-shaped magnet 39 is fixed to the tip on the radially inner side so as to face the side end surface 31 b of the inner ring 31, thereby forming the magnetic region in the holding plate 300. ing.
In such a structure, the ring-shaped magnet 39 can be unitized together with the holding plate 300, and the structure of the magnetic fluid seal 34A can be simplified.

  In this modification, the ring-shaped holding plate 300 is bent so that an intermediate portion thereof bulges outward in the axial direction, and a ring-shaped recess 300b is formed on the inner side in the axial direction of the tip. doing. The ring-shaped recess 300b is formed so as to face the side end surface 31b of the inner ring 31, and is attached so that the ring-shaped magnet 39 faces the side end surface 31b with a predetermined gap G. Has been. Therefore, when holding the ring-shaped magnet 39, the holding plate 300 can be saved in space without being thickened in the axial direction (in this modification, the holding plate 300 When the ring-shaped magnet 39 is attached to the recess 300b, the inner surface of the holding plate 300 is configured to be substantially flush). The ring-shaped magnet 39 has an S pole on the outer side in the axial direction and an N pole on the inner side in the axial direction, thereby forming a magnetic circuit with the inner ring 31 via the predetermined gap G ( An outline of the direction of magnetic flux is indicated by an arrow).

  The ring-shaped magnet 39 is attached in advance to the recess 300 b of the holding plate 300 and is press-fitted into the bearing body 32 in this state. At the time of the press-fitting, the peripheral end portion of the holding plate 300 is positioned by abutting against a stepped portion 36 b formed on the inner surface of the outer ring 36 of the bearing body 32. In this manner, after the holding plate 300 is press-fitted into the outer ring 36, the magnetic fluid 40 is injected into the portion of the predetermined gap G through the central opening region 300a using an injection member such as a dropper.

The injected magnetic fluid 40 is configured by dispersing magnetic fine particles such as Fe ₃ O ₄ in a surfactant and base oil, and has a characteristic of reacting when the magnet is brought close to the magnet. Yes. For this reason, as described above, the magnetic fluid 40 is surrounded at the predetermined interval G by the magnetic circuit formed between the ring-shaped magnet 39 and the side end surface 31b of the inner ring 31 made of a magnetic material. And the inside of the bearing body 32 (the rolling element side) is sealed. Also in this case, the magnetic fluid 40 is held between the inner ring 31 and the holding plate 300, more precisely between the magnet 39 held on the holding plate 300 and the inner ring 31, as in the embodiment and the modification described above. Has been.

In the above configuration, the predetermined gap G is between the ring-shaped magnet 39 attached to the holding plate 300 and the inner surface 31c of the inner ring 31 (this inner surface 31c is a portion into which the spool shaft 5 is fitted). It is preferable to set it to be smaller than the gap D.
This is because if the inserted spool shaft 5 is made of a magnetic material, the magnetic fluid may move to the portion of the interval D, but as described above (G <D). By setting, a stable amount of the magnetic fluid 40 can be held at the predetermined interval G, and the sealing effect can be enhanced (stabilized).

  In the above configuration, the ring-shaped sealing plate 33 is preferably press-fitted and fixed to the holding plate 300 from the outside in the axial direction. Such a sealing plate 33 can be formed of a material excellent in corrosion resistance and heat resistance, for example, stainless steel (SUS304), and a press-fitting bent portion 33a is formed at the peripheral end portion, and this portion is elastically deformed. However, by fitting into the stepped portion 36c formed on the inner surface of the outer ring 36, in addition to the seal by press-fitting the holding plate 300, it is ensured that moisture, dust, etc. enter the inner side along the inner surface of the outer ring 36. It becomes possible to prevent. The holding plate 300 having the bent intermediate portion has a ring-shaped recess 300c formed on the outer peripheral edge in the axial direction. The press-fitting bent portion 33a of the sealing plate 33 is formed using the recess 300c. By making it possible to arrange them, it becomes possible to achieve axial compactness.

Next, the effect of the bearing 302 described above will be described.
As described above, the magnetic fluid seal 34A projects the outer ring 36 in the axial direction with respect to the inner ring 31, and the magnetic region of the holding plate 300 fixed to the inner surface of the extending portion 36a of the outer ring 36 (this embodiment) In the configuration, the magnetic fluid 40 is held between the region where the ring-shaped magnet 39 is attached) and the side end face 31b of the inner ring 31, so that the axial dimension of the bearing having such a seal structure can be made compact. At the same time, the magnetic fluid 40 prevents foreign matter such as moisture and dust from entering the inside, and the sealing performance can be improved without deteriorating the rotational performance of the rotating shaft.

  Further, the magnetic fluid 40 is shielded by the holding plate 300 fixed to the inner surface of the extending portion 36a of the outer ring 36 without being exposed outward in the axial direction. Since it becomes difficult to be adsorbed by touching other objects, the handling property can be improved, and the inner ring 31 is formed short, so that the magnetic fluid 40 can be easily injected. Further, when water or dust enters, the magnetic fluid 40 to be held is not subjected to the intrusion pressure from the axially outer side by the holding plate 300 as described above (direct water pressure or the like acts). Therefore, it is possible to improve water resistance and dust resistance.

  Further, in the configuration of this modification, the ring-shaped magnet 39 including the sealing plate 33 is attached to the holding plate 300, and this is press-fitted into the outer ring 36, and the magnetic fluid 40 is injected into a predetermined region. The arrangement of the outer ring 36 and the shape of the holding plate 300 are efficiently arranged according to the shape of the outer ring 36, so that the entire bearing can be easily downsized. In this modification, the holding plate 300 is press-fitted inside the outer ring 36. However, the holding plate 300 is disposed along the axial end surface of the outer ring 36 without extending the outer ring 36 in the axial direction. A configuration in which a magnetic fluid is held between the magnet 39 and the end face of the inner ring is also possible.

  FIG. 9 shows a fifth modification of the bearing 30 with a magnetic fluid seal. In the fourth modified example, a holding plate 300 made of a non-magnetic material is fixed to the extending portion 36a of the outer ring 36, and a region having magnetism on the holding plate 300 (a region where the ring-shaped magnet 39 is attached). The magnetic fluid 40 is held between the inner ring 31 and the side end surface 31b of the inner ring 31. However, in the bearing 400 with a magnetic fluid seal according to the present modification, for example, SUS440C is used instead of the nonmagnetic material holding plate. A holding plate 300A made of such a magnetic material may be provided. In this case, the holding plate 300A is formed in a ring shape, and its tip (inner side in the radial direction) is bent toward the side end surface 31b of the inner ring 31, and the end surface 300Ab of the bent portion 300Aa is the side end surface 31b of the inner ring 31. The magnetic fluid 40 is held between the two.

A ring-shaped magnet 39 is attached on the inner side in the axial direction on the proximal end side of the holding plate 300A, and a magnetic flux as indicated by arrows M1 and M2 is generated on the holding plate 300A. In this case, the fixing position of the magnet 39 can be appropriately changed.
Even in such a configuration, the same effects as those of the above-described embodiments and modifications can be obtained, and the structure can be simplified to save the space in the axial direction.

  10 to 12 show a second embodiment of a fishing reel having a bearing with a magnetic fluid seal. In this embodiment, a bearing with a magnetic fluid seal is applied to a spinning reel. Specifically, as shown in the drawing, a reel body 101 of a spinning reel is integrally formed with a reel leg 102 to be attached to a fishing rod, and a rotor 103 rotatably supported in front of the reel leg 102 and a rotor 103 A spool 104 supported so as to be able to move back and forth in synchronism with the rotational movement is provided.

  The rotor 103 includes a pair of arm portions 103a that rotate around the spool 104, and a bail support member 103c having a base end portion of the bail 103b attached to each front end portion of each arm portion 103a is used for winding a fishing line. It is rotatably supported between the position and the fishing line discharge position. Note that one base end portion of the bail 103b is attached to a fishing line guide portion 103d provided integrally with the bail support member 103c.

  In the reel body 101, a handle shaft 105 is rotatably supported via a pair of bearings 140 (see FIG. 11) on both sides, and a handle 106 is attached to the protruding end portion. The handle shaft 105 is engaged with a take-up drive mechanism. The take-up drive mechanism engages with the drive gear 107 and a drive gear 107 mounted on the handle shaft 105 so as to be integrally rotatable. A pinion 108 extending in a direction orthogonal to the handle shaft 105 and having a hollow portion extending in the axial direction therein is provided.

  The pinion 108 is rotatably supported in the reel main body 101 via a bearing 109, and extends toward the spool 104, and a rotor 103 is attached to the tip end portion thereof.

  Further, the pinion 108 is provided with a rolling one-way clutch 110 at an intermediate portion thereof, and the one-way clutch 110 is operated by rotating a switching operation lever provided outside the reel body 101. A known reverse rotation prevention mechanism (stopper) for preventing reverse rotation of the handle 106 (rotor 103) in the fishing line feeding direction is configured.

  A spool shaft 112 that extends in a direction orthogonal to the handle shaft 105 and is fitted with a spool 104 on the tip side is inserted into the hollow portion formed inside the pinion 108 so as to be movable in the axial direction. Further, a known spool reciprocating device 113 for reciprocating the spool 104 (spool shaft 112) back and forth is engaged with the pinion 108.

  In the fishing spinning reel having such a configuration, when the winding operation is performed by the handle 106, the rotor 103 is driven to rotate through the winding drive mechanism, and the spool 104 is moved through the spool reciprocating device 113. Since it is reciprocated back and forth, the fishing line is evenly wound around the winding drum portion 104a of the spool 104 via the fishing line guide portion 103d.

  In this embodiment, the bearing 140 that rotatably supports the handle shaft 105 is configured as a magnetic fluid seal bearing. That is, as clearly shown in FIG. 12, the bearing 140 has the same structure as the magnetic fluid seal bearing 30 described above. In addition, not only the bearing 140 but other bearings including the bearing 109 may be configured as a bearing with a magnetic fluid seal.

  As mentioned above, although embodiment of this invention has been described, it cannot be overemphasized that this invention can be variously deformed and implemented in the range which is not limited to embodiment mentioned above and does not deviate from the summary. For example, the configuration for holding the magnetic fluid, the configuration for holding the magnet, the shape of the holding member (electrode plate), and the like can be modified as appropriate. Moreover, as long as a seal | sticker can be ensured with a magnetic fluid, the position of a holding | maintenance board, a magnet, and a magnetic fluid is arbitrary and is not limited at all.

1 Reel body 5 Spool shaft (drive shaft)
6 Spool 8 Handle 30, 30 ', 30 ", 30A, 301, 302, 400 Bearing 31 with magnetic fluid seal 31 Inner ring 32 Bearing body 33 Sealing plate 34, 34A Magnetic fluid seal 35 Rolling element 36 Outer ring 37, 38 Electrode plate (holding Board)
39 Magnet 99 Hexagonal ring (holding means)
300, 300A Holding plate 300b Recess S Seal accommodating space

Claims (7)

The fishing line is wound around the spool supported by the reel body by the rotation operation of the handle connected to the winding drive mechanism built in the reel body, and the drive shaft rotated by the operation of the handle can be rotated by the bearing. A fishing reel supported by
At least one of the bearings is
A bearing body comprising an inner ring made of a magnetic material, an outer ring made of a magnetic material, and a rolling element that is interposed between the inner ring and the outer ring so as to allow rolling.
Held together in the bearing body, and a magnetic fluid seal for sealing the interior of the bearing body form a magnetic circuit between said annulus,
With
The magnetic fluid seal, a magnet that forms a magnetic circuit between the inner wheel, a holding plate for holding the magnet, Ri consists magnetic fluid held between the holding plate and the inner ring A fishing reel characterized in that an O-ring is disposed between the reel body supporting the outer ring of the bearing body and the magnet held on the side by the holding plate .   The fishing reel according to claim 1, further comprising holding means for holding the magnetic fluid seal on the bearing body. When the axial length of the inner ring is set to be shorter than the axial length of the outer ring , the magnetic fluid seal is disposed in the seal housing space formed in the bearing body, and the holding plate is attached to the end surface of the outer ring . The fishing reel according to claim 1, wherein the fishing reel is incorporated so as to face the inner surface of the inner ring in a radial direction in a state of being in contact with the inner ring in the axial direction.   The fishing reel according to any one of claims 1 to 3, wherein the holding plate includes a pair of pole plates that hold the magnet from both sides.   The fishing reel according to claim 4, further comprising a sealing plate for sealing the inside of the bearing body to the outside, and the sealing plate also serves as one of the electrode plates. Fishing reel according to any one of claims 1 to 3 magnetic fluid, characterized in that it is held between the inner ring and the magnet held by the holding plate.   The fishing plate according to any one of claims 1 to 3, wherein the holding plate is formed with a ring-shaped recess so as to fix the ring-shaped magnet. Reel.

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