JPH0660365U - Plastic gear shaft support structure - Google Patents

Abstract

(57) [Summary] [Purpose] When the gear of the electric reel for fishing is made of resin, the thickness of the shaft support hole of the gear is reduced. [Structure] The insertion portion 44a of the gear shaft 44 has an oval cross section, and the gear 41 has a shaft support hole 41a and a cutout recess 41b.
And oval-shaped insertion holes 42a and 43a are formed in the metal washers 42 and 43 having an oval-shaped outer shape. By assembling each member having such a configuration, the gear shaft 44 or the gear 41
Is transmitted to the gear 41 or the gear shaft 44 in a dispersed state via the shaft support hole 41a and the washers 42 and 43. Therefore, the force is not concentrated on the shaft support hole 41a of the gear 41, and the thickness of the shaft support hole 41a can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shaft support structure of a resin gear, and more particularly to a shaft support structure of a resin gear that can be used even in a portion to which a large load is applied in an electric fishing reel.

[0002]

[Prior art]

 In recent years, in electric reels for fishing, resin gears such as polyacetal resin have been widely used in order to achieve the purposes of preventing rust against salt water, preventing gear meshing noise, and reducing weight.

However, when a resin gear is used in a portion to which a large load is applied, such as when a fish is wound, there is a risk of breakage due to the low resin strength of the conventional general resin gear. So can't be adopted.

[0004]

[Problems to be solved by the device]

 By the way, the structure of a gear is roughly divided into a tooth portion and a shaft support hole portion for supporting the gear by a gear shaft. When the gear is made of a resin having high strength in order to improve the strength of the tooth portion, it is naturally necessary for the portion of the shaft supporting hole to withstand the high strength.

However, in order to strengthen the strength of the shaft support hole portion, it is necessary to increase the thickness of the shaft support hole portion. Not only is it difficult to form the shaft support hole due to sink marks, but it is also not possible to store it in the limited space inside the side cover of the electric reel, which makes it impossible to manufacture a compact electric reel.

Further, as another means for strengthening the shaft support hole portion, there is a means for inserting metal, but there is a problem that it takes time to insert metal and productivity is not improved.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and the shaft support of the resin gear of the electric fishing reel for fishing in which the strength of the shaft support hole is strengthened without increasing the thickness of the gear. It is intended to provide a structure.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention reduces the motor output transmitted through a gear train by a planetary gear reduction mechanism or the like to rotationally drive a spool to wind a line, thereby making a resin such as an electric reel for fishing. In the shaft support structure of a gear, the gear is made of resin, and the gear is formed into a shaft support hole into which a gear shaft having a cross section other than a perfect circle is fitted, and a perfect circle formed around the shaft support hole. Other than the external shape and a through hole into which the gear shaft is fitted, and a notch recess into which a reinforcing member that reinforces the resin gear is fitted, and the reinforcing member is fitted into the notched recess of the resin gear. In the fitted state, the gear shaft was inserted into the insertion hole of the reinforcing member to transmit the force.

[0009]

[Action]

 As shown in FIG. 1, the gear 41 made of resin is provided with a shaft support hole 41a, and a cutout recess 41b is formed around the shaft support hole 41a (note that a cutout recess is also formed on the back side of the gear 41). ing). Metal washers 42 and 43, which are "auxiliary members", are fitted in the notched recesses on both sides, and in this state, the insertion portion 44a of the gear shaft 44 is inserted into the insertion holes 42a and 43a of the washers 42 and 43 and the shaft support hole 41a. Be inserted into. Therefore, when the force is transmitted from the gear shaft 44 to the gear 41 or the force is transmitted from the gear 41 to the gear shaft 44, the force of the gear shaft 44 or the gear 41 is applied to the outer peripheral portions of the washers 42, 43. It is transmitted to the gear 41 or the gear shaft 44 through the notch recess 41b and the shaft support hole 41a. Therefore, the force from the gear shaft 44 or the gear 41 is not concentrated only on the shaft support hole 41a, and a large force can be transmitted without thickening the circumference of the shaft support hole 41a.

[0010]

【Example】

 Hereinafter, the present invention will be described with reference to the illustrated embodiments. In this embodiment, the shaft support structure of the present invention is used in the electric fishing reel shown in FIGS. 4 and 5. FIG. 4 shows a plan sectional view of the electric reel, and FIG. 5 shows a left sectional view of the electric reel.

As shown in FIGS. 4 and 5, covers 23a and 23b are attached to the outside of the pair of left and right side frames 13a and 13b, respectively. A plurality of support rods (not shown) are installed between the side frames 13a and 13b, and the side frames 13a and 13b are supported at regular intervals.

A spool shaft 2 is rotatably supported in the central portion between the side frames 13 a and 13 b, and an arm cart 4 is fixed to the left side portion of the spool shaft 2. Further, a traverse cam 3 forming a part of the parallel winding mechanism is arranged above the side frames 13a and 13b. A cylindrical portion 1c of a spool 1 having left and right side walls 1a and 1b is externally fitted to the spool shaft 2, and an internal gear 10 is fixed by a screw 12 to the outside of the left side wall 1a of the spool 1. .

A planetary gear 5 meshed with the internal gear 10 and the first sun gear 6 is loosely fitted on a first gear shaft 8 provided upright on the armchair 4. The first sun gear 6 is fitted onto the second gear shaft 44, and the armchair 30 is fixed. Another planetary gear 5 meshed with the internal gear 10 and the second sun gear 7 is loosely fitted to the other first gear shaft 8 erected on the armature 30. A spool closing member 11 is pivotally supported by a second gear shaft 44 fitted into the left end portion of the spool shaft 2 so as to cover the outer periphery of the internal gear 10.

The second sun gear 7 is press-fitted to the second gear shaft 9, and when the second sun gear 7 rotates, the first connecting gear 14 press-fitted to the second gear shaft 44 is interlocked. ing.

The first connecting gear 41 is sequentially connected to the second connecting gear 15, the third connecting gear 16, the fourth connecting gear 17, and the motor gear 24, and the respective gears 15, 16 and 17 are respectively connected to the third connecting gear 15. It is rotatably supported by the gear shaft 18, the fourth gear shaft 19, and the fifth gear shaft 20. The gears 15, 16 and 17 are prevented from coming off while being kept rotatable by a gear holding plate 21 and a screw 22.

The motor 26 arranged below is screwed and fixed to the left side frame 13a. A one-way clutch 27 is arranged at the right end of the motor 26 to prevent the motor 26 from rotating in the reverse direction when the line (fishing line) is discharged. Reference numeral 28 is a bush for reinforcement.

Here, based on FIG. 1 and FIG. 2, a shaft support structure such as the first connecting gear 41 and the second gear shaft 44 according to the gist of the present invention will be described. As shown in FIG. 1, an insertion portion 44a having an oval cross section is provided at the tip of the second gear shaft 44 in a protruding manner. On the other hand, a shaft support hole 41a matching the oval type is formed in the center of the first connecting gear 41, which is a "resin gear", and an oval recess 41b is formed around the shaft supporting hole 41a. Has been formed. Four small holes 41c for press-fitting the pins 45a to 45d are formed at four corners of the cutout recess 41b. The metal washer 42, which is a "reinforcing member" whose outer shape matches the oval shape of the recess 41a, matches the cross-sectional shape (that is, oval shape) of the insertion portion 44a of the second gear shaft 44. An insertion hole 42a is formed. As a material for the resin gear, polyacetal or FRP obtained by reinforcing polyacetal with a fiber such as glass fiber is suitable.

Similarly, a cutout recess (not shown) is also formed on the back side of the first connecting gear 41, and a washer 43 having an oval-shaped insertion hole 43a is fitted therein. Then, when fixing the first connecting gear 41 and the second gear shaft 44, as shown in FIG. 2, first, the washer 42 and the washer 43 are fitted to both surfaces of the first connecting gear 41, and the pin is further attached. After press-fitting 45a to 45d, the second gear shaft 44 is inserted into the center insertion hole 42a, shaft support hole 41a and insertion hole 43a. In this state, the E-type retaining ring 46 prevents the second gear shaft 44 from falling off, and then the second gear shaft 44 is fixed to the bearing portion 47 of the cover 23a.

With the shaft support structure as described above, when a force is applied from the first connecting gear 41 to the second gear shaft 44, the force is applied to the notch recess 41b and the shaft of the metal washers 42 and 43. It is transmitted to the second gear shaft 44 via the support hole 41a. Therefore, the force is dispersed to the metal washer and the shaft support hole and transmitted to the second gear shaft 44, so that the force is not concentrated only on the shaft support hole and even if the thickness of the first connecting gear 41 is reduced. Can withstand a strong force (winding force when winding a coil).

In FIG. 4, the motor 26 arranged below is screwed and fixed to the plate 25 fixed to the left frame 13a. A one-way clutch 27 is arranged at the right end of the motor 26 to prevent the motor 26 from rotating in reverse when the line (fishing line) is discharged. Reference numeral 28 is a reinforcing bush.

As shown on the right side of FIG. 1, a clutch mechanism C formed between the right end portion of the spool shaft 2 and the pinion gear 31 allows the spool shaft 2 and the pinion gear 31 to be engaged and disengaged with each other. It is supposed to be done.

Next, the operation of the electric reel configured as described above will be described. When the fishing line is wound by rotating the handle, the rotation of the handle 34 is transmitted to the pinion gear 31 via the ratchet shaft 33 and the master gear 32. The pinion gear 31 and the spool shaft 2 are connected by a clutch mechanism C, and the rotation of the handle 34 is transmitted to the spool shaft 2. The rotation of the spool shaft 2 is transmitted to the arm wheel 4, the planetary gear 5, the first sun gear 6, and the arm wheel 30. The other planetary gear 5 tries to rotate the second sun gear 7, but the second gear shaft 44 to which the second sun gear 7 is fixed is constrained from rotating in one direction by the one-way clutch 27. Therefore, the second sun gear 7 is fixed, and as a result, the other planet gears 5 revolve around the outer periphery of the second sun gear 7. Therefore, the rotation of the handle 34 is transmitted to the internal gear 10 by the planetary gear 5, and the spool 1 is rotated in the winding direction of the fishing line. The rotation of the motor 26 during winding of the fishing line by the rotation of the motor is transmitted to the first connecting gear 41 by the motor gear 24. The rotation of the second sun gear 7 fixed to the first connecting gear 41 is transmitted to another planet gear 5, and the other planet gear 5 is meshed with the internal gear 10 of the spool 1. The armature 30 supporting the and the first sun gear 6 attached thereto are rotated to rotate the planetary gear 5. At this time, the armature 4 (spool shaft 2) supporting the planetary gear 5 is restrained from rotating by the reverse rotation stop mechanism, so that the spool 1 rotates in the winding direction of the yarn via the internal gear 10.

During the rotation of the spool 1 from the output of the motor 26 described above, the force is transmitted only on the side opposite to the handle of the side wall of the spool 1, so that the force transmission loss is small. Therefore, even if the motor 26 is of a relatively small size, it can generate sufficient torque to rotate the spool 1. When the spool shaft 2 and the pinion gear 31 are disconnected by the clutch mechanism C when the fishing line is fed out, the drive connection by the handle 34 is released, and the fishing line is delivered without rotating the handle 34. Also, the connection between each gear on the motor side and the planetary gear mechanism G is free because the transmission from the motor 26 to the sun gear 7 is restricted by the one-way clutch 27, and the planetary gear 5 idles on the sun gear 7. It becomes a state.

In this embodiment (FIG. 1), the outer shape of the metal washer and the cross section of the gear shaft insertion portion are oval, but as shown in FIG. 3, the cross section of the insertion portion 51a of the gear shaft 51 is Alternatively, the metal washers 52, 54 may have a rectangular shape, and the metal washers 52, 54 may have square insertion holes 52a, 54a. That is, if the insertion part of the gear shaft, the insertion hole of the washer, and the shaft support hole of the connecting gear have a shape other than a perfect circle (rectangle, ellipse, oval, polygon, etc.), the rotation of the gear shaft is the metal washer. , Distributed to the shaft support hole and transmitted to the gear shaft.

Further, the number of metal washers may be adjusted according to the shaft support strength, and may be attached only to one surface side of the connecting gear. Further, in the present embodiment, the pin was used as a means for attaching the washer to the connecting gear, but means such as welding, adhesion, screwing or the like may be used.

[0026]

[Effect of device]

 As described above, according to the present invention, the force of the gear shaft or the connecting gear is dispersed to the metal washer (reinforcing member) and the shaft supporting hole and is transmitted to the connecting gear or the gear shaft. The force is not concentrated only on the shaft, and the thickness of the shaft support of the connecting gear can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is an assembled sectional view of the first embodiment.

FIG. 3 is an exploded perspective view of another embodiment of the present invention.

FIG. 4 is a plan sectional view of an electric reel to which the present invention is applied.

5 is a left-side sectional view of the electric reel shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Spool 2 ... Spool shaft 5 ... Planetary gear (planetary gear mechanism) 6, 7 ... Sun gear (Planetary gear mechanism) 10 ... Internal gear 26 ... Motor 41 ... 1st connection gear (resin gear) 41a ... Shaft support Hole 41b ... Notched recess 42, 43 ... Metal washer (reinforcing member) 42a, 43a ... Washer insertion hole 44 ... Second gear shaft 44a ... Second gear shaft insertion portion

Claims (1)

[Scope of utility model registration request] 1. A shaft supporting structure for a resin gear, such as an electric reel for fishing, wherein a motor output transmitted through a gear train is decelerated by a planetary gear reduction mechanism or the like to rotationally drive a spool for line winding. The gear is made of resin, and the gear has a shaft support hole into which a gear shaft having a cross section other than a perfect circle is fitted, and an outer shape other than the perfect circle and the gear shaft formed around the shaft support hole. A notch recess into which a reinforcing member that reinforces the resin gear is inserted and which has an insertion hole into which the reinforcing member is fitted in the notch recess of the resin gear. A shaft support structure for a resin gear, characterized in that a gear shaft is inserted into the through hole to transmit force.