JPH07238997A - Speed change of micromotor - Google Patents

Abstract

PURPOSE:To miniaturize a micromotor to less than the specified size by engag ing a base plate with the small space of a motor part, and holding an outer case between this motor part and an upper cover. CONSTITUTION:Since a base plate 3 is engaged tight in a blind hole installed in a space of 0.85mm of a motor part 1, chips will in no case enter into the motor part at all. Likewise, since a pinion bottom is formed in a shank of a first pinion, a connecting tube 5 is engaged tight with this shank, and this connecting tube 5 is attached tight to a motor shaft 4, the first pinion is surely engaged tight to the connecting tube. In addition, each module of respective pinions 6, 7, 8, 9 and 10 is set to less than 0.1, whereby a pinion diameter is reducible, and thereby an occupied area of each pinion is also reduced to some extent, so that an outer diameter of a shift part 2 can be miniaturized to less than 10mmphi as far as a portion for that. Therefore, a speed changer of a micromotor being smaller than that of below 10mmphi is thus manufacturable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission for a micromotor.

[0002]

2. Description of the Related Art FIG. 2 is a partial sectional view showing a conventional embodiment. In a conventional micromotor transmission, as shown in FIG. 2, the upper plate (21) is a base plate (2).
It is held by the column (23) locked to 2),
Between the base plate (22) and the upper plate (21), the first pinion (2) fixed to the motor shaft (24).
2) Pinion (26), which transmits rotation from 5), 3
The pinion (27), the pinion (28), and the pinion (29) are locked. 5th pinion (29)
Is fixed to the speed change shaft (30). The base plate (22) and the motor part (31) are fixed to each other by engaging an outer case (32) covering the outer peripheries of the base plate (22) and the upper plate (21) with the motor part (31) and using a long screw (33). The outer case (32) to the motor part (31)
It was done by locking it to.

[0003]

However, in order to lock the outer case to the motor section using a long screw,
There is a problem in that it requires a space for inserting a long screw inside the outer case, and a space for arranging each pinion for gear shifting, which is a major obstacle to downsizing. Was. At the moment,
There are very few micromotor transmissions with a diameter of 10 mm or less. The present invention has been made to solve the above problems, and provides a transmission device for a micromotor that can be downsized to 10 mmφ or less.

[0004]

A micromotor transmission according to the present invention comprises a motor section having a motor shaft and a transmission section, and the transmission section has a motor section of 0.9 m.
A base plate that is locked in a blind hole formed in a space of m or less, a connect tube that locks a pinion 1 with a tooth bottom formed on its shaft and is fixed to a motor shaft, and a pinion module is 0.1 No. 2 pinion that transmits the rotation of the motor shaft through No. 1 pinion, which is formed below
No. 4 pinion, No. 4 pinion, No. 5 pinion, a speed change shaft to which the No. 5 pinion is fixed, a lower intermediate plate that pivotally supports the No. 2 pinion and the No. 3 pinion, an upper intermediate plate, and a No. 4 pinion the lower intermediate plate A fixed plate that is pivotally supported by and an upper plate tube that is locked to the fixed plate and that pivotally supports the transmission shaft by an upper intermediate plate, and an outer cover that is sandwiched between the upper cover that is locked to the fixed plate and the motor section. Is to have

[0005]

According to the above-described micromotor transmission according to the present invention, since the outer case is sandwiched between the motor section and the upper cover, a long screw for fixing the motor section is unnecessary, and the base plate is fixed. By locking in a very small space of the motor part, the space of that part can be made smaller and the outer diameter of the transmission part can be made smaller. Furthermore, add 0.1 module for each pinion.
By the following, since the pinion diameter can be reduced, the area occupied by each pinion is also reduced, and it is possible to manufacture a transmission device of a micro motor having a smaller size of 10 mmφ or less.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a speed change portion showing an embodiment of the present invention. In the figure, 1 is a motor section, 2 is a transmission section,
3 is a base plate locked to the motor part, 4 is a motor shaft extending from the motor part 1 and penetrating the base plate 3, 5 is a connect tube fixed to the motor shaft 4, and 6 is locked to the connect tube 5. No. 1 pinion, 7 is No. 2 pinion that meshes with No. 1 pinion 6, 8 is No. 3 pinion that meshes with No. 2 pinion 7, 9 is No. 4 pinion that meshes with No. 3 pinion 8, 10 is No. 4 pinion 9
A pinion 5 and a pinion 11 that mesh with the pinion 10 are fixed. The base plate 3 is locked in a blind hole provided in a space of 0.9 mm or less of the motor unit 1. A pinion bottom is formed on the shaft portion of the first pinion 6 and is locked to the connect tube 5. The second pinion 7 and the third pinion 8 are a lower intermediate plate 12 held by a lower column 15 locked by the base plate 3 and an intermediate column 1 retained by the lower intermediate plate 12.
It is pivotally supported by the upper intermediate plate 13 which is held at 6. The fourth pinion 9 is pivotally supported by a lower intermediate plate 12 and a fixed plate 14 held by an upper column 17 locked by the upper intermediate plate 13. The speed change shaft to which the fifth pinion 10 is fixed is an upper plate tube 18 locked to an upper intermediate plate 13 and a fixed plate 14.
Is supported by and. The 1st pinion 6, the 2nd pinion 7, the 3rd pinion 8, the 4th pinion 9, and the 5th pinion 10 are formed of 0.1 pinion modules. The outer case 20 is sandwiched by the motor unit 1 and an upper cover 19 which penetrates the upper plate tube 18 and is locked to the fixed plate 14. FIG. 3 is a cross-sectional view of the base plate locking portion in the embodiment of the present invention. The base plate 3 is locked in a blind hole provided in the 0.85 mm space of the motor unit 1. This prevents chips from entering the motor. FIG. 4 is a cross-sectional view of the connecting tube locking portion in the embodiment of the present invention. A pinion bottom is formed on the shaft portion of the first pinion 6,
The connect tube 5 is locked to the shaft portion, and the connect tube 5 is fixed to the motor shaft 4. As a result, the first pinion is securely locked to the connect tube. In the present embodiment, the micromotor transmission is described as an example, but it is needless to say that the same effect can be obtained even when applied to a general motor transmission.
Further, the pinion module can be set to 0.1 or less depending on the reduction ratio.

[0007]

According to the above-described micromotor transmission of the present invention, since the outer case is held between the motor portion and the upper cover, a screw for fixing the outer case is unnecessary. Further, since the blind hole for locking the base plate is provided in the space of 0.85 mm of the motor portion, the space of that portion can be reduced. further,
By setting the module of each pinion to 0.1 or less, the pinion diameter can be reduced, and the area occupied by each pinion is also reduced. Therefore, the outer diameter of the transmission unit is correspondingly 10 mmφ.
The size can be reduced as follows. As a result, the neck for downsizing has been eliminated, and it becomes possible to manufacture a transmission device of a smaller micromotor having a diameter of 10 mmφ or less.

[Brief description of drawings]

FIG. 1 is a sectional view of a transmission unit showing an embodiment of the present invention.

FIG. 2 is a sectional view of a speed change portion showing a conventional embodiment.

FIG. 3 is a sectional view of a base plate locking portion according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a connecting tube locking portion according to the embodiment of the present invention.

[Explanation of symbols]

1, 31 ・ ・ ・ Motor part, 2 ・ ・ ・ Transmission part 3, 22 ・ ・ ・ Base plate, 4, 24 ・ ・ ・
Motor shaft 5 ・ ・ ・ Connect tube 6,25 ・ ・ ・ 1st pinion 7, 26 ・ ・ ・ 2nd pinion 8, 27 ・ ・ ・ 3rd pinion 9, 28 ・ ・ ・ 4th pinion 10, 29 ・ ・ ・No. 5 pinion 11, 30 ... Gear shifting shaft, 12 ...
Lower intermediate plate 13 ... Upper intermediate plate, 14 ...
Fixed plate 15 ・ ・ ・ Lower column, 16 ・ ・ ・
Middle stanchion 17 ・ ・ ・ Upper stanchion 18 ・ ・ ・ Upper plate tube, 19 ・ ・ ・
Top cover 20, 32 ・ ・ ・ Outer case, 21 ・ ・ ・
Upper plate 23 ・ ・ ・ Posts, 33 ・ ・ ・
screw

Claims (4)

[Claims] 1. The present invention comprises a motor section (1) having a motor shaft (4) and a speed change section (2), and the speed change section (2).
The base plate (3) locked to the motor part (1), the connect tube (5) fixed to the motor shaft (4) by locking the first pinion (6), and the motor shaft (4). 2nd pinion (7), 3rd pinion (8), 4th pinion (9), 5th pinion (10) and 5th pinion (10) which transmit the rotation of The fixed transmission shaft (11), the lower intermediate plate (12) pivotally supporting the second pinion (7) and the third pinion (8), the upper intermediate plate (13) and the fourth pinion (9) are moved downward. A fixed plate (14) pivotally supported by the intermediate plate (12), and an upper plate tube (18) locked by the fixed plate (14) and pivotally supporting the speed change shaft (11) by the upper intermediate plate (13). , An upper cover (19) locked to the fixing plate (14) Outer cover is held de-motor unit (1) (20) and micro-motor of the transmission comprising a 2. The first pinion (6), the second pinion (7), the third pinion (8), the fourth pinion (9), and 5.
The pinion (10) is a pinion module with 0.1
The transmission for a micromotor according to claim 1, wherein the transmission is formed as follows. 3. The transmission device for a micromotor according to claim 1, wherein the locking hole of the motor portion (1) with which the base plate (3) is locked is a blind hole formed in a space of 0.9 mm or less. . 4. The micromotor transmission according to claim 1, wherein the shaft portion of the first pinion (6) is provided with a bottom of the first pinion (6).