JP2020103195A - Fishing reel, and gear used for power transmission unit for the reel - Google Patents

Abstract

To provide a fishing reel capable of suppressing discomfort in rotation even when plastic deformation occurs on a tooth surface of a gear part forming a power transmission unit.SOLUTION: A fishing reel comprises a power transmission unit which is provided in a reel body and transmits rotary drive force of a handle by engagement of gears. A tooth surface 35 of the gear is configured so that an engagement position L2 when a high load for causing plastic deformation of a tooth surface acts is deviated from an engagement position L1 in a low load time, and the engagement position in low load time is separated from a plastic deformation region S.SELECTED DRAWING: Figure 6

Description

The present invention relates to a fishing reel, and more particularly, to a fishing reel having a tooth surface of a gear that constitutes a power transmission mechanism and a gear that can be used for the power transmission mechanism.

The fishing reel is configured such that the handle is rotated to wind the fishing line on the spool, and a power transmission mechanism for transmitting the winding driving force of the handle is arranged inside the reel body. .. The power transmission mechanism is provided with gears that mesh with each other.For example, in a spinning reel, a face gear is attached to a handle shaft, and a pinion gear is meshed with this face gear, so that the handle shaft is rotated when the handle is wound. Rotational driving force is transmitted to the rotor.

In the fishing reel that transmits the rotational driving force of the handle shaft associated with the winding operation of the handle due to the meshing of the gears as described above, the tooth surface of the meshing portion is optimized and a good rotational feeling is obtained. I am trying. For example, Patent Document 1 discloses a method for determining a meshing advancing direction line for a face gear, and is configured so that even if a deviation in an assembly dimension occurs, uneven rotation of the face gear does not occur. ..

Patent No. 5501190

The fishing reel is required to have a smooth rotational feeling when the handle is rotated, but when a large fish hits during actual fishing, the handle is rotated with a large hoisting force, so the gears There is a peculiarity that a large load acts on the meshing surface of. The present inventor, in the fishing reel having such a peculiarity, a condition in which a load during actual fishing is not applied after the fishing line is wound around the spool by rotating the handle while a high load is applied. Attention has been paid to the fact that the rotation feeling is deteriorated when the winding operation is performed by rotating the handle in (low load winding to which a weak fishing line tension is applied, or no load winding to which no fishing line tension is applied).

The reason why such a rotational feeling is deteriorated is as follows.
When a large load as described above is temporarily applied to the reel unit, the rotation shaft supporting the gear is bent, the support portion is elastically deformed, the housing is deformed, etc. (referred to as a phenomenon of misalignment). This causes a misalignment in a state where such a high load is applied, and attempts to shift the tooth contact positions of the gears.

Conventional gears have a single curvature when viewed from a direction orthogonal to the direction in which the gears mesh with each other, so that a smooth rotational feeling can be achieved. Even if the above-mentioned error occurs or the above-mentioned misalignment occurs, it is designed so that the tooth abuts on the top region thereof along the meshing advancing direction. That is, the tooth contact position is made substantially constant regardless of the high load or the low load so that the rotational feeling is not affected.

However, there are various materials for forming the gear, and in view of cost, materials with low yield stress, such as zinc, copper, aluminum, and alloys thereof may be used. When the gear is made of such a material, there arises a problem that when the above large load acts on the tooth surface, plastic deformation occurs on the tooth surface.
Plastic deformation is formed by crushing an ideal tooth surface with one curvature into various shapes including a concave shape along the direction in which gears mesh with each other. If deformation occurs, even if the load is low, the meshing of the gears will be done at the part where plastic deformation has occurred, so the tooth surface will change from the ideal shape and the meshing transmission error will be large. This causes an uncomfortable feeling (rigid feeling) during the rotating operation under the condition that the high load is released. Regarding such discomfort, the angler does not notice it when he is under heavy load, where he is fully aware of how to handle fishing with the fish during actual fishing. Consciousness is concentrated on the feeling of the winding operation, and the tactile and auditory senses of the sensory functions react sensitively to make it easier to notice. This will affect the operation of detecting fish-cored by rotating the handle. Furthermore, after fishing, the handle is rotated in a no-load state where no tension is applied to the handle to perform detailed diagnosis such as oscillating performance in the drive part, rotation performance of the drive shaft, vibration displacement (performance check of each drive part after fishing). ) Becomes difficult.

The present invention has been made in view of the above-mentioned problems, and even if plastic deformation occurs in the tooth surface of the gear portion that constitutes the power transmission mechanism, a fishing reel that does not cause a feeling of strangeness in rotation, and An object of the present invention is to provide a gear that can be used in such a power transmission mechanism.

In order to achieve the above-mentioned object, the fishing reel according to the present invention includes a power transmission mechanism that is disposed in the reel body and that transmits the rotational driving force of the handle by meshing the gears with each other. The tooth surface of is designed to positively separate the meshing position when a high load acts to plastically deform the tooth surface from the meshing position when the load is low, so that the meshing position when the load is low It is characterized in that it is formed away from the plastic deformation region.

The tooth surface of the gear of the power transmission mechanism of the fishing reel described above is designed so that the position of meshing when a high load acts on the reel body is separated from the position at the time of a low load, and at the time of a high load. Even if plastic deformation occurs on the tooth surface, at low load, the meshing position moves away from the plastic deformation area, so the meshing rotation between gears is less likely to be affected by plastic deformation, and the power transmission error does not increase. , Does not cause a feeling of strangeness.

The above-mentioned "high load" means a load that causes plastic deformation on the tooth surface of the gear in the meshed state during the winding operation of the handle, and it changes depending on the constituent material of the gear. The size is not specified. The "low load" means a load that does not cause plastic deformation on the tooth surface of the gear (elastically deformable load that does not cause permanent strain).

Further, the present invention features a gear used for a power transmission mechanism of a fishing reel, and the gear has a plurality of curvatures when its tooth surface is viewed from a direction orthogonal to the meshing advancing direction. The tooth surface is provided with a region having a small curvature that meshes at a low load, and regions formed on both sides of the tooth surface that have a large curvature capable of meshing at a high load.

ADVANTAGE OF THE INVENTION According to this invention, even if a high load acts on a reel main body and plastic deformation|transformation occurs in the tooth surface of the gear part which comprises a power transmission mechanism, the fishing reel which does not give a feeling of strangeness in rotation is obtained. .. Further, according to the present invention, it is possible to obtain a gear that does not cause a feeling of strangeness in the rotating operation of the handle even after a large load is applied to the fishing reel.

Sectional drawing which looked at the fishing reel (spinning reel) which concerns on this invention from the back side. FIG. 2 is an enlarged view showing a portion of a meshing portion of a face gear and a pinion gear that form a power transmission mechanism in FIG. 1. The figure which expands and shows the tooth row structure of face gear, and one tooth in it. It is a schematic diagram which showed the tooth surface F of the tooth shown in FIG. 3 in two dimensions, and is a figure explaining the meshing state of the conventional tooth surface. Sectional drawing which followed the AA line of FIG. The example of the meshing state of the tooth surface in this invention is shown, (a) is a schematic diagram of a tooth surface, (b) is sectional drawing along the AA line, (c)-(e) is a tooth, respectively. The figure which shows the meshing advancing direction when the load which acts on a surface differs. The figure which expands and shows FIG.6(b).

First, the meshing relationship of gears forming a power transmission mechanism in a fishing reel (a spinning reel is exemplified), the shape of a conventional tooth surface, and its problems will be described.

FIG. 1 shows an example of a fishing reel (spinning reel), and is a cross-sectional view of the reel unit as viewed from the rear side.
A reel body 1A of a fishing reel (hereinafter, referred to as a reel) 1 according to the present embodiment is integrally formed with a reel leg 2 having a rod mounting portion to be mounted on a fishing rod. A rotor 3 that is rotatably supported and a spool (not shown) that is movably supported back and forth in synchronization with the rotational movement of the rotor 3 are provided.

The reel unit 1A includes a body 1B that houses the power transmission mechanism 30, and a thin plate-shaped lid 1C that closes an opening of the body 1B. A handle shaft 5 is rotatably supported in the reel body 1A via a pair of bearings 5a and 5b, and a handle 7 is attached to the protruding end portion thereof. The handle shaft 5 is supported so as to project from both sides of the reel unit 1A, and the handle 7 is mounted on either one (right-handed/left-handed) as is well known, and the handle is not mounted. The cap 8 is attached to the side handle shaft.

A power transmission mechanism 30 is engaged with the handle shaft 5, and the power transmission mechanism 30 has a face gear 31 integrally rotatably mounted on the handle shaft 5 and a pinion tooth portion meshing with the face gear 31. The pinion gear 33 is provided to extend in a direction orthogonal to the handle shaft 5 and to form a pinion 32 in which a cavity extending in the axial direction is formed.

The pinion 32 is rotatably supported in the reel body 1A by a pair of bearings (not shown) on the front side and the rear side, and the rotor 3 is integrally rotatably attached to the tip of the pinion 32. .. A spool shaft 12 that extends in a direction orthogonal to the handle shaft 5 and has a spool mounted on the tip side is movably inserted in the hollow portion formed inside the pinion 32 in the axial direction. The spool shaft 12 is reciprocally driven back and forth by a known spool reciprocating device 20 that is driven via a gear train connected to a pinion 32.

With the above-described structure, when the handle 7 is wound up, the rotor 3 is rotationally driven via the face gear 31 and the pinion gear 33 that form the power transmission mechanism 30, and the spool shaft is moved via the spool reciprocating device 20. 12 (spool) is reciprocated in the front-rear direction, and the fishing line is evenly wound around the spool through the fishing line guide portion of the rotor 3 which is rotationally driven.

FIG. 2 is an enlarged view showing a meshing portion of a face gear and a pinion gear that constitute the power transmission mechanism in FIG. 1.
As shown in FIG. 2, the rotation axis 5A of the handle shaft 5 (the rotation axis of the face gear 31) and the rotation axis 33A of the pinion gear 33 are orthogonal to each other, and both gears have a driving force in the twisting direction. It is composed of a helical gear (helical gear) capable of transmitting. It should be noted that the twisted state of the tooth surface of each gear, the meshing ratio, the basic configuration such as a module, and the forming material of each gear are not limited.

In the present invention, in the meshing relationship between the gears, the tooth surface shape of the gear in which plastic deformation occurs is formed as described later. In this case, the plastic deformation that occurs in the tooth surface occurs in either gear depending on the strength of the tooth surface of the gear that meshes with it, but in the present embodiment, the tooth surface of the face gear (driving gear) 31 that is the driving side It is assumed that plastic deformation occurs.

FIG. 3 is an enlarged view showing a tooth row configuration of the face gear 31 and one tooth 31A therein. Further, FIG. 4 is a schematic view showing the tooth surface F of the tooth 31A shown in FIG. 3 in a two-dimensional manner, and is a view for explaining the meshing state of the conventional tooth surface, and FIG. 5 is a line AA of FIG. It is sectional drawing along.

3 and 4, the arrow D indicates the direction in which the face gear 31 and the pinion gear 33 mesh with each other. Further, in FIG. 4, the X axis indicates the horizontal direction of the central portion of the surface (tooth surface F) of the tooth 31A, and the Y axis indicates the vertical direction of the central portion. Therefore, the inclination angle α of the meshing advancing direction D with respect to the X axis is an element specified by dimensional tolerance, assembling error, or the like. In addition, the range in which both gears actually mesh is not the entire range in the meshing advancing direction D but the range R of the intermediate portion. This range R is an element that depends on the meshing ratio that is preset for both meshing gears, and the pinion gear starts meshing from the tooth root side and the pinion gear separates on the tooth tip side.

As described above, the tooth surface of the conventional gear that has a meshing relationship is designed in consideration of dimensional tolerances, built-in errors, etc., so that even if such an error occurs, a smooth rotational feeling can be obtained. The surface 31a of the tooth 31A is configured with one curvature (curvature radius R) as shown in FIG. 5 (deformed). That is, since the tooth surfaces of both gears that are meshed with each other are formed so as to mesh with each other in the top region and move in the traveling direction D, there is a sufficient state of relief on both sides of the top region. Even if the position of the gear on the other side is displaced due to the influence of an error or the like, the meshed state is obtained at substantially the same position so that the rotational feeling is not affected.

However, in such a meshing relationship between the tooth flanks, if the gear is made of a material that plastically deforms and causes plastic deformation on the tooth flanks under the condition that a large fish is caught, when the gears are in a low load state Causes a drop in the ring. The reason for this is that a large fish is placed on the reel body to cause a large load, and the rotation axis 5A of the handle shaft 5 (the rotation axis of the face gear 31) and the rotation axis 33A of the pinion gear 33 are bent, and their supporting portions, Is that the housings such as the body 1B and the lid 1C are deformed (mainly elastically deformed) to cause misalignment and the low load state in which the deformation is small causes the meshing at substantially the same position. It is due to.

As described above, since the tooth surface shape of the conventional meshing gear is configured with one curvature so as not to affect the rotation feeling, the contact point of the tooth surface of both gears in the meshing advancing direction is Even if the alignment is deviated, the position is almost near the top and the change of the locus of the contact point is small. This is shown in the cross-sectional view of FIG. 5. Even if the positions of the mating gears (pinion gears) are relatively displaced due to the misalignment caused by the high load, they contact each other near the top. Since the reliefs on both sides at the contact position are large, the loci of contact points on both tooth surfaces do not change significantly.

Therefore, as shown in FIG. 4 and FIG. 5, the locus of the contact point of the gear in the state where there is no torque (no load) is L0, and the state where the torque that does not cause plastic deformation is applied (low load) If the locus of the gear contact point is L1 and the locus of the gear contact point under the condition that the torque that causes plastic deformation is applied (high load) is L2, the position of the locus L0 and the position of the locus L2 on the curved surface. The distance W between and becomes short, and the locus L0 of the contact point of the gear in the state where there is no torque falls within the range that causes plastic deformation.

As a result, as described above, when a high load acts and the surface 31a of the tooth 31A is plastically deformed and crushed (in FIG. 5, the plastically deformed portion is shown as a recess 31d), the load becomes low. Also, the loci L1 and L0 of the contact points of the tooth flanks of both gears exist within the crushed range (the range of the depression 31d). That is, once the tooth surface is plastically deformed, the meshing progresses within the plastically deformed range (W) even when the load is low, which causes a reduction in the rotational feeling.

In the present invention, the tooth surfaces of the gears that mesh with each other are corrected so that the position of meshing when a high load that plastically deforms the tooth surface acts, separates from the position of meshing when the load is low. The meshing position under load is formed so as to deviate from the plastically deformed region.

Specifically, in the present embodiment, as shown in FIG. 6, the surface (tooth surface) 35 of the tooth 31A of the plastically deformed face gear has a plurality of curvatures when viewed from a direction orthogonal to the meshing advancing direction. Is formed to have. That is, the meshing surface is not formed to have a single curvature, but is formed to have a plurality of curvatures. In this embodiment, the surface 35a is formed by a portion having a small curvature (curvature radius Ra). , On both sides thereof, surfaces having three curvatures are formed (Ra>Rb, Rc), which are surfaces 35b, 35c formed by portions having larger curvatures (radius of curvature Rb, Rc).

In the above-described tooth surface shape, in a normal meshing state (a state of low load), the meshing progresses on the surface 35a of the portion having a small curvature, and the state becomes a high load enough to cause alignment misalignment. When the position of the side gear (pinion gear) is displaced, the other side gear can be brought into contact with the surface 35b of the part having a large curvature, and the distance W between the position of the locus L0 and the position of the locus L2 is gained. I am trying. That is, regarding the tooth surface shape, the curvature of the convex shape of the tooth surface in the changing direction is partially reduced so that the locus of the contact point can be positively displaced with the addition of the torque.

This is because when a misalignment occurs and the position of the gear on the other side shifts, the contact position with respect to the surface 35 also tries to change accordingly, but as described above, a single curvature causes meshing in the top region. Further, in the conventional tooth surface shape, since the reliefs on both sides are sufficiently secured, the teeth do not move positively, and the meshing progresses in substantially the same region.

On the other hand, as in the present embodiment, the clearance is not sufficient on the surface 35a where the engagement progresses at a low load and the curvature is small, and the curvature is formed large on the surface 35b, and the clearance is sufficient. Since it is ensured, it is possible to displace it so that the meshing progresses at this position when the load is high (the mesh is separated by a distance W1). That is, since the plastic deformation of the tooth surface when a high load acts occurs at the position of the locus L2 (occurs in the region S), the loci L0 and L1 when the load becomes low have the influence of the region S of the plastic deformation. Never receive. In the meshing relationship between the face gear and the pinion gear as in the present embodiment, when a load acts on the tooth surface, the meshing position shifts from the position of the locus L0 in the direction of arrow D1 (the direction in which the meshing becomes shallow) and becomes high. At the time of load, the meshing is performed in a region (front surface 35b) having a large curvature formed in a direction in which the meshing becomes shallow. Further, the surface 35c in the direction of the arrow D2 from the position of the locus L0 is preferably rounded (formed to have a curvature larger than that of the surface 35a) in consideration of an assembly error or the like so as not to hit one side.

According to the shape of the tooth surface described above, even if the tooth surface of the gear that meshes with a high load acts to cause plastic deformation, the rotation performance is not affected when the gear is in a low load state, and the meshing is performed. The transmission error does not increase. Therefore, in the fishing reel having the power transmission mechanism including the gear with the tooth surface formed as described above, since it is not affected by the plastic deformation of the tooth surface, a high load acts and the tooth surface is not plastically deformed. Even after the occurrence, it is possible to detect the fish-string by a subtle rotation operation. Further, after fishing, detailed diagnosis such as oscillating performance in the drive part, rotational performance of the drive shaft, vibration displacement, etc. can be performed accurately.

The tooth surface as described above can be formed in a general gear manufacturing process, for example, at the time of grinding the tooth surface. In this case, on the tooth surface, if the locus of the contact point under low load is a portion with a small curvature and the locus of the contact point under a high load is a portion with a large curvature, the surface shape between the two is particularly limited. It will not be done. For example, a recessed shape may be provided between the position where the meshing progresses when the load is low (the position of the locus L0) and the position where the meshing progresses when the load is high (the position of the trace L2). The shape may be provided.

Further, regarding the distance W1 between the position of the locus L0 of the contact point at the time of a low load and the position of the locus L2 of the contact point at the time of a high load, the material, size, shape and gear material of the housing including the supporting portion , The module, the amount of plastic deformation, the amount of misalignment of alignment when a high load is applied, etc. Further, the surfaces 35b and 35c formed by the parts having large curvatures (radius of curvature Rb, Rc) on both sides of the part having small curvatures may have different curvatures or may have the same curvatures.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be variously modified.
The above-described correction of the tooth surface may be performed on both gears that mesh with each other, or may be performed on only one gear on the side having a low yield stress. The gear meshing relationship may be a configuration (spur gear) other than the helical structure, and the fishing reel can be applied to various reels such as a dual bearing reel. .. Further, the tooth surface shape as in the present invention can be applied to the gears of the power transmission mechanism of various devices other than the power transmission mechanism of the fishing reel.

1 Fishing Reel 1A Reel Main Body 1B Body 1C Lid 3 Rotor 31 Gear (Face Gear)
31A teeth 35, 35a to 35c surface (tooth surface)

Claims (4)

In a fishing reel provided in a reel body, comprising a power transmission mechanism for transmitting a rotational driving force of a handle by meshing gears,
The tooth surface of the gear is such that the meshing position when a high load that plastically deforms the tooth surface is displaced from the meshing position when the load is low, and the meshing position when the load is low moves away from the plastic deformation region. Is formed on the
A fishing reel characterized by this. The fishing reel according to claim 1, wherein the tooth surface of the gear has a plurality of curvatures when viewed from a direction orthogonal to the meshing advancing direction. The tooth surface is formed with a region having a small curvature and a region having a large curvature in a direction in which the meshing becomes shallow. When the load is low, the region is meshed with the region having the small curvature, and when the load is high, the region having the large curvature is formed. The fishing reel according to claim 2, wherein the reels are engaged with each other. A gear used for a power transmission mechanism of a fishing reel,
The tooth surface of the gear has a plurality of curvatures when viewed from a direction orthogonal to the meshing advancing direction, and the tooth surface is formed on both sides of a region having a small curvature meshing when the load is low. A gear having a large curvature capable of meshing under high load.