JP2003278217A - Motorized toilet stool cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of a motorized toilet stool cleaner which conventionally is not used for a low tank or the like which requires lightweight and compact properties because a large fitting area (to the projection face crossing at right angles with the axial center of the rotary shaft) is required due to a plurality of gear rows having respectively different shafts from each other. <P>SOLUTION: The toilet stool cleaner is constituted of a spindle 18 in which a lever 19 opening/closing a drain valve 20 for cleaning the toilet stool is attached to the front end thereof and a drive motor 32 rotating the spindle 18 in the right and left hands. An epicyclic gear train is interposed between the spindle 18 and the motor 32 to concentrically arrange the motorized toilet cleaning device. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric toilet cleaning device for a toilet bowl.

[0002]

2. Description of the Related Art A conventional electric toilet cleaning device of this type is mounted inside a low tank for storing toilet cleaning water, and the power of a drive motor 32 is transmitted to rotate a lever attached to the tip of a spindle 18. The drain valve provided in the lower part of the raw tank was pulled up and opened and closed. In this structure, the output shaft of the drive motor 32 and the spindle 18 are connected to each other via the plurality of gear trains 70, so that the shafts are different from each other.

[0003]

However, the above is large (relative to the plane of projection orthogonal to the axis of the spindle) because it has a plurality of gear trains each having different axes.
It needed a mounting area. Therefore, there is something unacceptable for use in low tanks and the like, which are required to be lightweight and compact. In view of the above-mentioned conventional problems, the present invention is intended to reduce the size and cost of the electric toilet bowl cleaning device.

[0004]

In order to solve the above-mentioned problems, in the invention of claim 1, a spindle having a lever attached to its tip for opening and closing a drain valve for toilet bowl cleaning, and this spindle Since the spindle and the output shaft of the motor are concentrically arranged, it is possible to reduce the mounting area of the device itself and to drive a compact low tank etc. It becomes possible to install a toilet bowl cleaning device.

According to the second aspect of the present invention, there is provided a spindle equipped with a lever for opening and closing the toilet flushing drain valve and a drive motor for rotating the spindle in forward and reverse directions. Since the planetary gear mechanism is used for the reduction gear train in the electric toilet cleaning device by transmitting the force to the spindle through the reduction gear train, the drive motor, the reduction gear train and the spindle can be arranged concentrically. Therefore, since the outer shape of the device itself can be made concentric with the spindle with respect to the projection plane orthogonal to the axis of the spindle, the electric toilet bowl cleaning device can be installed in a compact low tank or the like.

According to the invention of claim 3, in addition to the invention of claim 2, since the planetary gear mechanisms are arranged in a plurality of stages in series, a relatively small motor and planetary gear mechanism are sufficient, so a storage design is required. You can make it even easier.

According to the invention of claim 4, in addition to the inventions of claims 2 to 3, since a torque limiter mechanism is provided between the output shaft and the spindle, which is the final stage of the planetary gear mechanism, the drain valve is provided. When the spindle side is overloaded, such as when an abnormality occurs, the planetary gear mechanism is not overloaded, so that the device itself is not damaged.

According to the invention of claim 5, in addition to the inventions of claims 2 to 4, position information corresponding to the open / closed state is output between the spindle and the output shaft, which is the final stage of the planetary gear mechanism. Since the position detection means is provided, the open / close position of the spindle does not shift even if the teeth of the gear are chipped, and stable operation is possible.

According to the invention of claim 6, in addition to the inventions of claims 2 to 5, the planetary gear mechanism is made substantially the same as the outer diameter of the drive motor, so that the torque generated by the motor and the planetary gear mechanism are You can design the reduction ratio and the optimal balance,
It is possible to make the size to the minimum necessary.

According to the invention of claim 7, in addition to the inventions of claims 2 to 6, since a plurality of planet gears of the planetary gear mechanism are provided, it is possible to receive the load in a distributed manner. The breaking strength of the two planetary gears can be designed to be small.

According to the invention of claim 8, since the drive motor, the reduction gear train and the spindle can be arranged in parallel, the side space of the electric toilet bowl cleaning device can have a space and the storage design can be further varied. It will spread.

According to the ninth aspect of the invention, since the drive motor, the reduction gear train and the spindle can be arranged at right angles, it is possible to make room in the side or lower space of the electric toilet bowl cleaning device, and a variation in storage design. Will be further spread.

According to the tenth aspect of the present invention, since the drive motor, the reduction gear train and the spindle can be arranged in the striation, a space can be provided in the side or the lower side of the electric toilet bowl cleaning device, and the storage design can be varied. Will be further spread.

In the eleventh aspect of the present invention, since the spindle can bias the drain valve to the opening side by the torsion spring, a smaller motor and a planetary gear mechanism can be used, which makes the storage design easier. You can

According to the twelfth aspect of the invention, since the winding transmission means can be combined, the layout design of the drive motor, the reduction gear train, and the spindle of the electric toilet bowl cleaning device becomes extremely easy.

In the thirteenth aspect of the present invention, since the torque limiter mechanism is constituted by the friction system between the output shaft and the spindle, which is the final stage, an overload is applied to the spindle side such as an abnormality of the drain valve. Also in this case, the planetary gear mechanism is not overloaded, so that the device itself is not damaged. Further, when the output shaft and the spindle at the final stage are slipped, the output shaft is smooth and no abnormal noise is generated.

In the fourteenth aspect of the present invention, since the torque limiter mechanism is constituted by the friction method by using the lubricant between the final stage output shaft and the spindle, the grease such as the reduction gear enters the torque limiter mechanism. Even so, the performance of the torque limiter is not so affected.

According to the fifteenth aspect of the present invention, since the torque limiter mechanism by the ratchet system is provided between the output shaft and the spindle, which is the final stage, when an overload is applied to the spindle side such as an abnormality of the drain valve. However, since the planetary gear mechanism is not overloaded, the device itself is not damaged. Further, since the performance of the torque limiter is determined by the ratchet shape, the material, etc., the performance of the torque limiter is easy to manage.

According to the sixteenth aspect of the present invention, since the output shaft and the spindle, which are the final stage, are fastened so as not to shift in the spindle direction, even if the operation such as the abnormality of the drain valve is repeated, The output shaft and the spindle do not shift in the spindle direction. Therefore, since the positional relationship between the output shaft and the spindle, which is the final stage, does not shift, there is no interference with the functional component storage cylinder or the like, and the performance of the electric toilet bowl cleaning device is not deteriorated.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. FIG. 1 is a perspective view of the toilet bowl cleaning device of the present invention. In the figure, the casing 11 of the heating toilet seat device 10 is fixed by utilizing the upper surface of the rim on the back side of the toilet body 1, and the toilet seat 12 and the toilet lid 13 are attached to the casing 11 so as to be openable and closable. Further, the low tank 14 is fixed by utilizing the upper surface of the rim on the back side of the toilet body. An electric toilet cleaning unit 30 that is non-rotatably inserted and fixed is attached to a through-hole 16 provided through the wall 15 of the low tank.

The electric toilet cleaning unit 30 includes a remote controller 1
When the toilet wash switch 7 is pressed, the drive motor 32 in the toilet wash unit is energized, and the rotational torque is transmitted to the spindle 18 via the transmission gear. The lever 19 attached to the tip of the spindle 18 rotates and the drain valve 2 for cleaning the toilet bowl
Activate 0.

As shown in FIG. 2 or FIG. 3, an electric wiring 50 that bundles the power line and the signal line is drawn out from one end of the functional component housing portion 30, and the electric wiring 50 is of the controller inside the casing 11. Insert into the connection plug 21.

FIG. 4 shows a sectional view of the electric toilet bowl cleaning unit 30, and FIG. 5 shows an exploded perspective view thereof. As shown in the figure, the electric toilet bowl cleaning unit 30 has a cylindrical functional component storage cylinder 31, which has an electric wire extraction hole 31b at one end and has the other end open, and the functional component storage cylinder 31 and the toilet seat 12 are non-rotatably fixed. Block 31a for fixing, a drive motor 32 composed of a DC brush motor, a planetary gear mechanism 33 (three stages in series in this embodiment) forming a reduction gear train, and a load above the setting is applied to the spindle 18. Torque limiter mechanism 34 and toilet seat 12 for not transmitting the load to the reduction gear train when
, A bearing 36 having an insertion hole 36b into which the spindle 18 is inserted, a torsion spring 3 for constantly urging the toilet seat 12 in the opening direction.
7, a functional component storage cylinder 31, a spring receiver 38 that is non-rotatably fixed, and a fixing member 39 for fixing the spring receiver 38 inside the functional component storage cylinder 31. A female screw for screwing the fixing member 39 is provided on the inner periphery of the open end of the functional component storage cylinder 31, and an inner gear 33a (described later) and a spring receiver 38 are made non-rotatable on the inner side of the female screw. Provide serrations.

The output shaft of the drive motor 32 has a sun gear 32.
a is press-fitted so that it can be mechanically connected to a planetary gear mechanism 33 described later.

Next, referring to FIG. 6, the electric toilet bowl cleaning unit 3
The planetary gear mechanism 33, which is the reduction gear train used for No. 0, will be described. The planetary gear mechanism 33 includes an inner gear 33a provided on the inner circumference of the functional unit storage cylinder 31, a plurality of planetary gears 33b ... Which mesh with the inner gear 33a, and a sun gear 33c which meshes with the planetary gear 33b. The planet gears 33b are rotatably (rotatably) supported by projecting shafts 33d ... Which protrude from the back surface of the sun gear 33c. Three projecting shafts 33d are provided annularly at predetermined intervals, for example, three at 120 ° intervals, and three planetary gears 33b are attached. In addition, the planetary gear 3 is provided by providing a fixing hole 33f for integrating the tip end portion of the protruding shaft 33d ... And a lid 33e having a sun gear insertion hole 33g.
3b ... Are unitized as a planetary gear mechanism 33.

Next, referring to FIG. 7, an electric toilet bowl cleaning unit 3
The torque limiter mechanism 34 used for No. 0 will be described.
The torque limiter mechanism 34 is the final stage planetary gear mechanism 33.
It is composed of a torque transmission gear 34a and a friction gear 34b which are non-rotatably fixed to the sun gear 33c. The torque transmission gear 34a is formed in a disk shape with an edge, a hole 34c having substantially the same shape as the front side protruding shaft 33h of the sun gear 33c is provided in the center, and a transmission protrusion 34d is provided inside the edge portion. Friction gear 3
4b is formed in a cross shape with an elastic body such as rubber, and has an outer protrusion 3
4e receives the rotational force from the transmission projection 34d within a predetermined load, and when the predetermined load is exceeded, the outer projection 34e causes the transmission projection 3d to move.
It is formed so as not to transmit the rotational force to the friction gear 34b by being deformed by 4d. A power transmission projection 34f is provided at the center of the friction gear 34b.

The absolute position of the spindle 18 is detected by a potentiometer 35 incorporated between a torque limiter mechanism 34 and a bearing 36 (described later). The potentiometer 35 is composed of one printed circuit board 35a attached to the bearing 36 and a position brush 35b provided at one end of the spring receiver 38. Printed circuit board 35a
A concentric pattern portion and a print resistor portion are formed on the top. The central angle of the printed resistor portion corresponds to the rotation angle of the spindle 18 when the spindle 18 is opened and closed. The position brush 35b slidably contacts the pattern portion and the print resistor portion at the tip portion thereof to be electrically conductive. When the spindle 18 rotates, the bearing 36 is correspondingly rotated.
Is rotated to change the position of the position brush 35b with respect to the printed circuit board 35a, and this is electrically detected to detect the position of the spindle 18.

The bearing 36 is provided at one end with an engagement hole 36a for non-rotatably coupling with the transmission projection 34f of the friction gear 34b and at the other end with an engagement hole 36b for non-rotatably coupling with the spindle 18. .

The torsion spring 37 has one end fixed to the bearing 36 and the other end fixed to the spring receiver 38.
This is for biasing the toilet seat 12 toward the open side by the torsion force. (Actually, the torsion spring 37
The seat 12 is closed by its own weight against the urging force of the seat. )

The spring receiver 38 is provided with a fixing portion for fixing the torsion spring 37 on the inner circumference and serrations on the outer circumference.

The fixing member 39 for preventing the retainer is formed with an external thread on its outer periphery, and is screwed into a female screw on the inner surface of the functional component storage cylinder 31 to store the above-mentioned components in the functional component storage cylinder 31. It is a unity.

With the above structure, the rotational force of the drive motor 32 is attached to the output shaft of the drive motor 32, and the sun gear 32 is attached.
a → first planetary gear mechanism (planetary gear 33b (rotation → revolution) → sun gear 33c) → second planetary gear mechanism (planetary gear 33b (rotation → revolution) → sun gear 33c) → final stage planetary gear mechanism (Planetary gear 33b (rotation → revolution) → sun gear 33c) → torque limiter mechanism 34 (torque transmission gear 34a → friction gear 34b) → spring receiver 36 → spindle 18 and the drain valve is opened / closed. It is possible to realize a smooth opening / closing operation by detecting the opening / closing angle of the spindle 18 with the potentiometer 35 and performing feedback control of the drive motor 32.

In the electric toilet bowl cleaning device of this embodiment,
Since the rotational force of the drive motor 32 is transmitted to the spindle 18 via the planetary gear mechanism 33, the drive motor 3 is concentrically arranged.
2 and the planetary gear mechanism 33 and the spindle 18 can be arranged, and the outer shape of the device itself can be concentric with the spindle 18 with respect to the projection plane orthogonal to the axis of the spindle 18. Therefore, the storage design of the toilet bowl cleaning device becomes extremely easy.

Further, the output shaft of the drive motor 32, the rotation shaft of the sun gear 33c of the planetary gear mechanism 33, and the shaft centers of the sun gears 33c of the planetary gear mechanism arranged in multiple stages are arranged concentrically, so that the toilet bowl The speed reduction mechanism of the cleaning device can be downsized. Further, since the spindle 18 of the toilet seat 12 or the toilet lid 13 and the output shaft of the drive motor 32 are arranged concentrically, the mounting area of the device itself is reduced, and the device can be installed in a compact low tank. Since the plurality of planetary gear mechanisms 33 are arranged in series, a relatively small drive motor 32 and planetary gear mechanism 33 can be used.

Further, since the torque limiter mechanism 34 is provided between the output shaft 33h, which is the final stage of the planetary gear mechanism 33, and the spindle 18, an overload is applied to the spindle side such as an abnormality in the drain valve. In case of planetary gear mechanism 3
3 is not overloaded. Further, at that position, the potentiometer 3 for detecting the open / closed state of the spindle 18
Since 5 is provided, the seat cover 1
The open / close positions of 2 and 13 do not shift, and stable operation is possible.

The planetary gear mechanism 33 is connected to the drive motor 32.
By setting the outer diameter of the drive motor 32 to be substantially the same as the outer diameter of the drive motor 32, the generated torque of the drive motor 32 and the reduction ratio of the planetary gear mechanism 33 can be designed in an optimum balance, and the required minimum size can be obtained.

Furthermore, since the planetary gear mechanism 33 is composed of a plurality of planetary gears 33b, each planetary gear 33b can receive the load in a distributed manner, and the breaking strength of each planetary gear can be designed to be small. The planet gear 33b
By providing the three projecting shafts 33d of the sun gear 33c that undergoes the orbit of 3 at equal intervals, the sun gear 33c can be stably rotated.

Next, FIG. 8 shows a second embodiment. The components having the same functions as those in the above-described embodiment are designated by the same reference numerals as those in the first embodiment. In the present embodiment, the output shaft 52, the slip ring 50, and the fixed ring 5 which are the final stage of the planetary gear mechanism 33.
1, a bearing 36, a collar 53 inserted in the bearing 36,
This is a torque limiter mechanism based on a friction method that includes a fixing screw 54 that fastens the output shaft 52 and the bearing 36. The slip ring 50 is fitted to the output shaft 52 and does not slip in the rotation direction. Further, since the fixed ring 51 is fitted to the bearing 36, it does not slip in the rotation direction. Therefore, when an overload is applied to the spindle side such as an abnormality in the drain valve, the slip ring 50 and the fixed ring 51 do not slip and the planetary gear mechanism is not overloaded. There is no damage. Further, when the output shaft and the rotary shaft at the final stage are slipped, they are smooth and no abnormal noise is generated. Furthermore, the slip ring 50 and the fixed ring 5
Since the slip torque is set by using a lubricant between the first and second gears, even if grease such as the reduction gear enters the torque limiter mechanism, the performance of the torque limiter is not significantly affected. Further, since the output shaft 52 and the bearing 36 are fastened by the fixing screw 54 with the collar 53 inserted in the bearing 36 being sandwiched, even if the operation such as the abnormality of the drain valve is repeated, the final stage Therefore, the output shaft and the rotary shaft do not shift in the rotary shaft direction. Therefore, since the positional relationship between the output shaft 52 and the bearing 36 in the direction of the rotation axis does not shift, the interference with the functional component storage cylinder and the like is eliminated, and the performance of the electric toilet cleaning device is not deteriorated.

Next, FIG. 9 shows a third embodiment. The components having the same functions as those in the above-described embodiment are designated by the same reference numerals as those in the first embodiment. In this embodiment, the drive motor 32 and the planetary gear mechanism 33, which is a reduction gear train, are mechanically connected using a spur gear. By using the spur gears 60a and 60b for transmitting the power of the drive motor 32, the drive motor, the reduction gear train, and the rotary shaft can be arranged in parallel, and thus the compact motor can be installed in a compact low tank. This makes it possible to expand the variety of storage designs. Further, in order to transmit the power of the drive motor 32 in parallel, a helical gear or a helical gear may be used.

Next, FIG. 10 shows a fourth embodiment. The components having the same functions as those in the above-described embodiment are designated by the same reference numerals as those in the first embodiment. In this embodiment, the drive motor 32 and the planetary gear mechanism 33, which is a reduction gear train, are mechanically connected using a worm gear 61. By using the worm gear 61 to transmit the power of the drive motor 32 in this manner, the drive motor, the reduction gear train, and the rotary shaft can be arranged at a right angle or in a staggered manner, so that the drive motor 32 can be installed in a compact low tank. Because it will be possible
The variety of storage design will be further expanded. Further, a straight bevel gear, a spiral bevel gear, a face gear, a hypoid gear, a screw gear, or the like may be used to transmit the power of the drive motor 32 at a right angle or a stagger.

Next, FIG. 11 shows a fifth embodiment. The components having the same functions as those in the above-described embodiment are designated by the same reference numerals as those in the first embodiment. In this embodiment, the drive motor 32 and the planetary gear mechanism 33, which is a reduction gear train, are mechanically connected by using a winding transmission means. By thus using the winding transmission means for transmitting the power of the drive motor 32, the drive motor 32 and the planetary gear mechanism 33, which is a reduction gear train, can be set at an appropriate distance, so that the electric toilet cleaning device is driven. The degree of freedom in layout design of the motor, reduction gear train, and rotary shaft is increased. Further, since there is no hit sound between the motor pinion 62 and the gear, the noise can be reduced. Further, a flat belt, a V-belt, a toothed belt or the like may be used as the winding transmission means.

Next, FIG. 12 shows a sixth embodiment. The components having the same functions as those in the above-described embodiment are designated by the same reference numerals as those in the first embodiment. In this embodiment, the automatic opening / closing device 30 for the toilet seat
Since a and the automatic lid-opening / closing device 30b for the toilet lid can be arranged on the parallel shafts, they can be installed in a compact raw tank.

[Brief description of drawings]

FIG. 1 is a front perspective view of a toilet bowl cleaning device equipped with an electric toilet bowl cleaning unit 30 of the present invention.

FIG. 2 is a rear perspective view of a toilet bowl cleaning device equipped with the electric toilet bowl cleaning unit 30 of the present invention.

FIG. 3 is a mounting view (mounting state) of a toilet bowl cleaning device equipped with the electric toilet bowl cleaning unit 30 of the present invention.

FIG. 4 is a sectional view of the electric toilet bowl cleaning unit 30 of the present invention.

FIG. 5 is an exploded perspective view of the electric toilet bowl cleaning unit 30 of the present invention.

6 is a sectional view taken along line AA of FIG.

7 is a sectional view taken along line BB of FIG.

FIG. 8 is a sectional view of a second embodiment of the electric toilet bowl cleaning unit 30 of the present invention.

FIG. 9 is a sectional view of a third embodiment of the electric toilet bowl cleaning unit 30 of the present invention.

FIG. 10 is a fourth view of the electric toilet bowl cleaning unit 30 of the present invention.
Sectional view of the embodiment

FIG. 11 is a fifth view of the electric toilet bowl cleaning unit 30 of the present invention.
Sectional view of the embodiment

FIG. 12 is a sectional view of a conventional toilet bowl cleaning unit.

[Explanation of symbols]

1: toilet body, 12: toilet seat, 13: toilet lid, 14: low tank, 15: low tank wall, 16: through hole, 17: remote controller, 18: spindle, 19: lever, 20: drain valve, 21: connection plug , 30: Electric toilet cleaning unit,
31: Functional component storage cylinder, 32: Drive motor, 33: Planetary gear mechanism, 34: Torque limiter mechanism, 35: Potentiometer, 36: Bearing, 37: Torsion spring,
38: Spring receiver, 39: Fixing member

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16H 35/10 F16H 35/10 GH (72) Inventor Yoshiro Terada 1-chome Maigaoka, Kokuraminami-ku, Kitakyushu, Fukuoka Pan-Washlet Co., Ltd. (72) Inventor Hiroomi Miyamoto 1-1-1, Maigaoka, Kokuraminami-ku, Kitakyushu, Fukuoka Prefecture F-term in Pan-Washlet Co., Ltd. (reference) 2D039 AA02 BA11 DB00 FD01 3J027 FA36 FB40 GA01 GB03 GC13 GC23 GD04 GD08 GD12 3J062 AA45 AA60 AB06 AC01 BA19 CF02 CF38

Claims (16)

[Claims] 1. A spindle having a lever for opening and closing a drain valve for flushing a toilet bowl attached to a tip thereof, and a drive motor for rotating the spindle in forward and reverse directions, respectively. The spindle and the output shaft of the motor are concentric. An electric toilet bowl cleaning device characterized in that it is arranged in. 2. A spindle equipped with a lever for opening and closing a toilet flushing drain valve at its tip and a drive motor for rotating the spindle in forward and reverse directions, respectively. In the electric toilet cleaning device which transmits to the spindle via the electric toilet cleaning device, a planetary gear mechanism is used for the reduction gear train. 3. The electric toilet cleaning device according to claim 2, wherein the planetary gear mechanisms are arranged in a plurality of stages in series. 4. The electric toilet cleaning device according to claim 2 or 3, wherein a torque limiter mechanism is provided between the output shaft and the spindle, which is the final stage. 5. The electric toilet bowl cleaning device according to claim 2, wherein position information corresponding to an open / closed state is output between an output shaft and a spindle which are the final stage of the planetary gear mechanism. An electric toilet bowl cleaning device, characterized in that it is provided with a position detecting means. 6. The electric toilet bowl cleaning apparatus according to claim 2, wherein the planetary gear mechanism has substantially the same outer diameter as that of the drive motor. . 7. The electric toilet bowl cleaning device according to claim 2, wherein a plurality of planet gears of the planetary gear mechanism are provided. 8. The electric toilet bowl cleaning device according to claim 2, wherein the spindle and the output shaft of the motor are arranged in parallel with each other. 9. The electric toilet bowl cleaning apparatus according to claim 2, wherein the spindle and the output shaft of the motor are arranged at a right angle. 10. The electric toilet cleaning device according to claim 2, wherein the spindle and the output shaft of the motor are arranged in a pair. 11. The electric toilet bowl cleaning apparatus according to claim 2, wherein the spindle is biased toward the open side by a torsion spring. 12. The electric toilet bowl cleaning apparatus according to claim 2, wherein a winding transmission means is combined. 13. The electric toilet bowl cleaning apparatus according to claim 4, wherein a torque limiter mechanism is configured by a friction method between an output shaft and a spindle, which is a final stage. 14. The electric toilet bowl cleaning device according to claim 13, wherein a torque limiter mechanism is constituted by a friction method using a lubricant between the output shaft and the spindle, which are the final stage. apparatus. 15. The electric toilet bowl cleaning apparatus according to claim 4, wherein a torque limiter mechanism is configured between the final stage output shaft and the spindle by a ratchet system. 16. The electric toilet bowl cleaning device according to claim 13, wherein the output shaft and the spindle at the final stage are fastened together so as not to shift in the rotation axis direction.