JP2772862B2 - Stirrer with concentric 2-output shaft reducer - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an improvement in a stirrer in which an inner stirring blade and an outer stirring blade provided in a stirrer are rotated at relatively different rotational speeds. More specifically, the present invention relates to a stirrer in which deceleration rotation is extracted from two concentric output shafts by one rotary drive motor, and the outer and inner stirring blades of the stirrer are fixed to the two output shafts.

(Prior art) A type in which stirring blades of the same length are attached to two rotating shafts in a stirring tank, and the stirring blades are decelerated and rotated in the same or opposite directions by a motor to perform uniform mixing and promote reaction. Is considered. (JP-A-4-215829) An example of the stirring tank proposed above will be described with reference to FIGS. 2 and 3. FIG.

The stirring tank 1 is provided with stirring blades 4, 5 of the same length attached to two output shafts 2, 3. The output shafts 2, 3 are separately decelerated and rotated by respective motors 6, 7. Have been allowed.

The output shaft 2 is provided through the hollow output shaft 3, and the output shaft 2 is directly connected to the output rotation shaft 8 of the motor 6. The output shaft 3 has a gear 9 attached to an end thereof, and the gear 9 meshes with a pinion 11 attached to an output rotation shaft 10 of the motor 7. The motors 6 and 7 are motors with a speed reducer such as a planetary gear speed reducer, and the motors 6 and 7 reduce the rotation of the motor from the output rotary shafts 8 and 10 and take out the motors.

(Problems to be Solved by the Invention) The above-mentioned proposed stirring device has a structure in which two motors 6 and 7 with speed reducers are provided in order to take out reduced speed rotation from the two output shafts 2 and 3. Therefore, the deceleration rotation mechanism is complicated and large, and the cost is high.

Furthermore, since the two motors 6 and 7 with a speed reducer are installed, the upper structure of the stirring tank 1 is restricted, and the layout of the stirring tank 1 may be difficult.

In order to solve the above problem, it is possible to transmit the output rotation from one motor to the first output shaft on the one hand and to the second output shaft via the gear transmission mechanism on the other hand. In addition, the gear transmission mechanism takes up space similarly to the second motor, and causes high cost.

Therefore, an object of the present invention is to solve the above-mentioned problems and reduce the rotation of two output shafts with one motor, and at the same time provide a stirrer equipped with a concentric two-output shaft reducer with a compact mechanism. To offer.

(Means for Solving the Problems) The feature of the present invention is that a stirring tank, an inner stirring blade arranged in the stirring tank, and arranged in the stirring tank,
An outer stirring blade having substantially the same length as the inner stirring blade, a motor, and a reduction drive mechanism for reducing the output rotation of the motor and transmitting the output rotation to the inner rotating blade and the outer rotating blade. To the inner stirring blade and the outer stirring blade via the deceleration driving mechanism, and the inner stirring blade and the outer stirring blade are rotated at relatively different speeds. An intermediate shaft for reducing the output rotation of the motor by one or more stages of planetary gear reduction mechanisms, a first sun gear provided on the intermediate shaft, and a second sun gear provided on the intermediate shaft A revolving planetary gear meshing with the first sun gear, a fixed internal gear meshing with the revolving planetary gear, an output shaft carrier to which a support shaft of the revolving planetary gear is fixed, and an output shaft carrier. A first output shaft provided; A fixed planetary gear meshing with the second sun gear, a rotating internal gear internally meshing with the fixed planetary gear, and a hollow second output shaft provided on the rotating internal gear; The first output shaft is a concentric two-output shaft reducer provided through the hollow portion of the second output shaft, and one or more stages of planetary gear reduction mechanisms for rotating the intermediate shaft at a reduced speed are provided in a casing. A planetary gear reduction mechanism having a dual-purpose fixed internal gear, and having a casing on the outer periphery of the rotary internal gear, for reducing the speed of the second output shaft; The above-mentioned fixed internal gear that also serves as the casing of the planetary gear reduction mechanism is fixed to the casing, the inner stirring blade is fixed to the first output shaft, and the outer stirring blade is fixed to the second output shaft. The wings are fixed.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a stirrer provided with a concentric two-output shaft speed reducer according to one embodiment of the present invention. Here, the internal structure of the stirrer is the same as that described in FIGS. 2 and 3, and is not shown here.

A first sun gear 23 is provided on an output rotation shaft 22 of the motor 21, and a first revolution planetary gear 24 meshes with the first sun gear 23. The first revolving planetary gear 24 is also internally meshed with the first fixed internal gear 25. The support shaft 26 of the first revolution planetary gear 24 is fixed to the first carrier 27. An intermediate shaft 28 is provided at the center of the first carrier 27, and has a second sun gear 29 and a third sun gear
30 are provided. The first fixed internal gear 25 also serves as a casing.

The second sun gear (first sun gear provided on the intermediate shaft) 29 meshes with the second revolving planetary gear 31 and
Internally meshed with the fixed internal gear 32. The support shaft 33 of the second revolving planetary gear 31 is fixed to the output shaft carrier 34. The output shaft carrier 34 is provided with a first output shaft 35 integrally or separately. The first output shaft 35 is provided with a stirring blade (not shown).

A fixed planetary gear 36 meshes with a third sun gear (second sun gear provided on the intermediate shaft) 30. The support shaft 37 of the fixed planetary gear 36 is fixed to the casing 38, and the fixed planetary gear 36 is in mesh with the rotary internal gear 39. The rotating internal gear 39 is provided with a second output shaft 40. The second output shaft 40 is hollow, and the first output shaft 35 is provided through the hollow portion. Second output shaft
40 is rotatably supported by a bearing 41, and the second output shaft 40 is provided with a stirring blade (not shown). Further, a bearing 42 is also provided between the first output shaft 35 and the hollow second output shaft 40.
Is provided.

The fixed internal gear that also serves as the casing of the reduction mechanism of the intermediate shaft 28 is fixed to the casing 38 of the reduction mechanism of the first output shaft 35 and the second output shaft 40.

The operation of the speed reducer according to one embodiment of the present invention configured as described above will be described below.

The output rotation of the motor 21 is the first rotation provided on the output rotation shaft 22.
Of the first revolving planetary gear 24 via the sun gear 23, and the revolving of the first revolving planetary gear 24 is taken out as the reduced rotation of the first carrier 27 via the support shaft 26. Then, the first carrier 27 rotates the second sun gear 29 and the third sun gear 30 via the intermediate shaft 28. The second sun gear 29 revolves the second orbiting planetary gear 31, and the orbit of the second orbiting planetary gear 31 is changed via the support shaft 33 to the output shaft carrier 34.
And is taken out as the decelerated rotation of the first output shaft 35.

The third sun gear 30 rotates (rotates) the fixed planetary gear 36, and the rotation of the fixed planetary gear 36 causes the rotating internal gear 39 to rotate at a reduced speed. The reduced rotation is taken out from the second output shaft 40.

In this embodiment, the rotation direction of the first output shaft 34 and the rotation direction of the second output shaft 40 are opposite to each other.

When the number of rotations of the intermediate shaft 28 is 1, the reduction ratio i ₁ of the first output shaft 35 is z _{1 for} the number of teeth of the second sun gear 29 and z _{2 for the} number of teeth of the fixed internal gear 32. Where i ₁ = 1 + z ₂ / z ₁ where the sign + indicates that the rotation direction of the first output shaft 35 is the intermediate shaft
This indicates that the rotation direction is the same as the rotation direction 28.

Also, the second output shaft when the rotation speed of the intermediate shaft 28 is 1
40 reduction ratio i ₂ is the third sun gear 30 number of teeth z ₃ of the number of teeth of the rotary internal gear 39 as a _{z 4 i 2 = -z 4 /} z 3 where reference numeral - the second Output shaft 40 rotates in the middle direction
This indicates that the rotation direction is opposite to the rotation direction of 28.

The rotation ratio (i ₁ / i ₂ ) between the first output shaft 35 and the second output shaft 40 is i ₁ / i ₂ = − (1 + z ₂ / z ₁ ) / (z ₄ / z _3), and by selecting the respective number of teeth _{z 1, z 2, z 3} , z 4 to appropriately, and that can be set in a wide range.

As described above, according to the present invention, the degree of freedom of setting the rotation speed of the first output shaft 35 is increased, and the rotation speed of the first output shaft 35 is higher than the rotation speed of the second output shaft 40. It can be set small, and the degree of freedom in setting the rotation ratio between the first output shaft 35 and the second output shaft 40 increases.

In the above description, the present invention is not limited to the above embodiment.

For example, in the above-described embodiment, the reduced rotation of the intermediate shaft 28 is obtained by a one-stage planetary gear reduction mechanism, but may be a two-stage or more planetary gear reduction mechanism.

Further, a motor with a speed reducer may be used as the motor.

In the present invention, the phrase "rotating at a relatively different speed" includes a case of rotating at a different speed in the opposite direction and a case of rotating at the same speed.

(Effects of the Invention) The effects of the present invention configured as described above are enhanced as follows.

Since rotation can be taken out from two concentric output shafts with only one motor, the size and cost of the stirrer that rotates the outer stirring blade and the inner stirring blade at relatively different speeds can be obtained. Can be

In addition, since the fixed internal gear that also serves as the casing of the reduction mechanism of the intermediate shaft is fixed to the casing of the reduction mechanism of the second output shaft, the mechanism is downsized, and the overall structure is downsized.

Since the degree of freedom for setting the rotation ratio between the inner output shaft and the outer output shaft is increased, the rotation speed of the inner stirring blade can be made smaller than the rotation speed of the outer stirring blade.

Since the center of the output rotation shaft of the motor and the rotation center of the planetary gear reduction mechanism are always concentric, there is no bias in the rotation mechanism,
Stable rotation is obtained, and the stirring effect is improved.

Since the planetary gear reduction mechanism is employed, the space in the radial direction is not deviated and the space may be substantially circular, so that the layout of the device is not hindered.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a stirring tank as an example to which the present invention is applied, and FIG. 3 is a partial cross-sectional view showing a stirring tank provided with a concentric two-output shaft reducer as proposed. 21: motor, 22: output rotating shaft, 23: first sun gear, 24: first revolving planetary gear, 25: first fixed internal gear, 26:
Support shaft, 27: first carrier, 28: intermediate shaft, 29: second sun gear (first sun gear provided on intermediate shaft), 30: third sun gear (provided on intermediate shaft) Second sun gear), 31: second orbiting planetary gear, 32: second fixed internal gear, 33:
Support shaft, 34: output shaft carrier, 35: first output shaft, 36: fixed planetary gear, 37: support shaft, 38: casing, 39: rotating internal gear, 40: second
Output shaft, 41, 42: bearing

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-129866 (JP, A) JP-A-58-184351 (JP, A) JP-A-60-69280 (JP, A) JP-A-60-69 11750 (JP, A) JP-A-62-247996 (JP, A) JP-A-63-111933 (JP, A) JP-A-3-292442 (JP, A) JP-B-47-2247 (JP, B1) Jikken 46-29085 (JP, Y1) Jikken 48-39726 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16H 37/06 F16H 1/28 B01F 7/00 , 7 / 14,7 / 30

Claims (1)

(57) [Claims] 1. A stirring tank, an inner stirring blade disposed in the stirring tank, an outer stirring blade disposed in the stirring tank and having substantially the same length as the inner stirring blade, a motor, and a motor A speed reduction drive mechanism for reducing the output rotation and transmitting the rotation to the inner rotor and the outer rotor, and transmitting the rotation of the motor to the inner stirring blade and the outer stirring blade via the reduction drive mechanism. In the stirring apparatus, the inner stirring blade and the outer stirring blade are rotated at relatively different speeds, wherein the reduction mechanism causes the output rotation of the motor to be reduced by one or more stages of planetary gear reduction mechanisms. An intermediate shaft, a first sun gear provided on the intermediate shaft, a second sun gear provided on the intermediate shaft, a revolving planetary gear meshing with the first sun gear, and the revolving planetary gear A fixed internal gear that meshes with the revolving planetary gear An output shaft carrier on which the support shaft is fixed, a first output shaft provided on the output shaft carrier, and a fixed planetary gear meshing with the second sun gear;
A rotating internal gear internally meshing with the fixed planetary gear, and a hollow second output shaft provided on the rotating internal gear;
The first output shaft is a concentric two-output shaft reducer provided through the hollow portion of the second output shaft, and one or more stages of planetary gear reduction mechanisms for rotating the intermediate shaft at a reduced speed. A planetary gear reduction mechanism for rotating the second output shaft at a reduced speed, which has a casing on the outer periphery of the rotating internal gear, and for reducing the rotation of the intermediate shaft; A fixed internal gear that also serves as a casing of a planetary gear reduction mechanism having more than one stage is fixed to the casing, the inner stirring blade is fixed to the first output shaft, and the outer stirring blade is fixed to the second output shaft. A stirrer provided with a concentric two-output shaft reducer, wherein the stirrer is fixed.