JP3273225B2 - Rotary atomizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary atomizer used for drying various kinds of powders such as ceramics, foodstuffs, pharmaceuticals, etc., a granulating step and removing harmful exhaust gas.

[0002]

2. Description of the Related Art In general, a rotary atomizer includes a rotary disk provided at the lower end of an output shaft, which is approximately 6,000.
Rotating at a high speed of up to 24,000 rpm, and using a centrifugal force acting on the rotary disk, a liquid containing a solid component or a slurry of the powder supplied to the rotary disk is supplied from a spray nozzle provided on the rotary disk into the chamber. To produce atomized substances by drying or chemical reaction. In addition, chemical treatment is performed using slurries and chemicals to remove harmful exhaust gases.

[0003] This rotary atomizer is generally provided with an input shaft arranged vertically in a main body case,
Below the input shaft, an input shaft and an output shaft arranged on the same axis are supported via bearings, respectively, and a planetary roller type speed increasing device is disposed between the input shaft and the output shaft. And
The output shaft projects from the lower end of the main body case, and a rotary disk is provided at the lower end of the output shaft. Some of the speed increasing devices employ a planetary gear system.

For example, a rotary atomizer disclosed in Japanese Utility Model Laid-Open Publication No. Sho 56-44245 will be described with reference to FIG.
An input shaft 102 disposed in the upper part of the input shaft 102 in a vertical direction is supported via a bearing 103, and a hollow lower shaft 104 is connected to a lower portion of the input shaft 102 by a reamer bolt 105. A planetary roller type speed increasing device 106 is disposed between the lower shaft 104 and the output shaft 10.
7 is inserted and arranged on the same axis as the input shaft 102 so that the bearing 10
8, and the output shaft 107 is protruded from the lower end of the main body case 101 through the output shaft insertion cylinder 110 erected in a lubricating oil tank 109 provided at the lower portion of the main body case 101, and A rotary disk 111 is provided, and each bearing 103, 10
8 and a lubricating oil supply circuit 112 for supplying lubricating oil to the planetary roller type speed increasing device 106 and the like.

[0005]

The rotary atomizer generally has a rotary disk of 6,000.
In order to rotate at a high speed of about 24,000 rpm, the accuracy of the center axis of rotation is increased, and the production and assembly accuracy is improved so as to eliminate weight imbalance of parts so as to minimize the occurrence of vibration. I have.

However, in the process of changing the rotation speed at the time of start and stop, when the motor temporarily passes through the primary and secondary resonance rotation speeds temporarily, vibration may occur due to bending due to resonance. . In addition, when the slurry or the like adheres and hardens unevenly in the rotary disk provided at the tip of the output shaft having a long shaft length, the eccentric mass is loaded and becomes one of the forced vibration sources.

Since the sun roller integrated with the output shaft is tilted due to these vibrations, stress is partially concentrated between the rollers that are in contact with each other, and peeling or splitting of the roller surface occurs. was there.

[0008] Even if the planetary gear type speed increasing device is used, there is a problem similar to the above.

In addition, since the connection structure of the drive mechanism is complicated, disassembly and assembly at the time of maintenance and inspection are troublesome.

Accordingly, an object of the present invention is to provide a rotary atomizer in which the speed increasing device does not fail even when the output shaft is tilted due to resonance or eccentric load.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides an input shaft disposed vertically in a main body case, and disposed below the input shaft on the same axis as the input shaft. The output shafts are supported via bearings, and a planetary roller type or planetary gear type speed increasing device is disposed between the input shaft and the output shaft, and the output shaft is moved from the lower end of the main body case. is projected, a rotary atomizer having a rotary disk to said output shaft bottom, the detachable circular cylinder casing in the main body casing, the input shaft to the upper cylindrical case, the output in the lower cylindrical casing Shaft, the speed increasing device is disposed between the output shaft and the input shaft, respectively, and the sun shaft and the output shaft of the speed increasing device are toothed.
Involute with crowning in the direction of the streaks and width of the teeth
Straight spline to the male joint formed on the straight spline.
Mating with the female joint formed on the auto spline
It is characterized by being swingably connected via a shaft coupling.
You.

A specific relation between the male joint and the female joint is as follows.
The staff, as a first, the male joint portion at the upper and lower ends of the joint,
The female joint portion is provided at a lower end of the sun shaft and an upper end of the output shaft.
And the male joint at the top of the joint is female at the bottom of the sun shaft.
At the joint, connect the male joint at the lower end of the joint to the female joint at the upper end of the output shaft.
Respectively, as the second, the upper end of the joint and the
The female joint at the upper end of the output shaft, the lower end of the sun shaft and
The male joints are provided at the lower end of the joint, respectively.
The male joint at the lower end of the sun shaft is attached to the female joint, and the male joint at the lower end of the joint.
Parts are fitted to the female joints at the upper end of the output shaft, respectively.
The male joint at the lower end of the sun shaft, and the output shaft
The female joints are provided at the upper end of the
The joint is fitted to the female joint at the upper end of the output shaft. Also,
The upper end of the sun shaft is supported on the lower end of the input shaft via a bearing.
And the output shaft is connected to the cylindrical casing.
Steel balls between the inner and outer rings on the upper and lower bearings
Use an angular ball bearing with
The straight line connecting the steel ball to the inner ring and the outer contact points
Has a certain contact angle with respect to the dial direction,
On the line extending in the axial direction of the cylindrical case, the output shaft
Involute spline of female joint at upper end and female joint
Of the involute spline of the male joint that fits
The reference contact point where the mating pitch circles intersect
Arrange so that it is at the center of the tooth width of the volute spline.
It may be provided. Furthermore, the cylindrical case is
An upper cylindrical case in which the input shaft and the speed increasing device are disposed, and a lower cylindrical case in which the output shaft is disposed,
Both cylindrical case may be detachable.

[0013]

[Operation] According to the above configuration, the sun shaft and the output shaft are swingably connected via the shaft coupling, so that the inclination of the output shaft due to the vibration due to the resonance of the output shaft or the forced vibration due to the eccentric mass is reduced. Even if it occurs, the inclination of the sun axis does not occur, so that the rollers or the gears are kept in contact with uniform stress.

The upper cylindrical case provided with the input shaft and the speed-increasing device and the lower cylindrical case provided with the output shaft are detachable so that the drive mechanism can be disassembled and assembled at the time of maintenance and inspection. Easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the embodiments shown in the drawings.

FIGS. 1 to 8 show a first embodiment of the present invention. As shown in FIG. 3, a rotary atomizer 1 is installed on a ring receiver 2a of a chamber 2.
The rotary atomizer 1 includes a main body case 3 having a driving mechanism, a supply pipe 4 for slurry or the like, and an air supply device 5.
A first air supply pipe 6, a second air supply pipe 7, and an air discharge pipe 8 are connected to each other.

As shown in FIG. 2, the main body case 3 has a cylindrical upper case 10 detachably provided above the mounting plate 9 with the mounting plate 9 mounted on the ring receiving base 2a interposed therebetween. An inverted conical lower case 11 is provided at the lower part of the plate 9 so as to be detachable.

In the upper case 10, a cylindrical case 13 incorporating a planetary roller type speed increasing device 12 shown in FIG. 1 is detachably provided, and an output shaft 14 projecting from the lower end of the cylindrical case 13 is shown in FIG. As shown in the figure, a rotary disk 15 is provided at the tip of the lower case 11 so as to penetrate the lower case 11 and protrude from the lower surface of the lower case 11.

The inside of the lower case 11 is, as shown in FIG.
The lubricating oil tank 16 is provided with an output shaft insertion cylinder 16a through which the output shaft 14 is inserted, and is formed in a double structure of an inner lubricating oil tank 16 and an outer cooling chamber 17. The first air supply pipe 6 and the air discharge pipe 8 are connected to the lubricating oil tank 16 for cooling the lubricating oil in the lubricating oil tank 16. And the second air supply pipe 7 are provided.

As shown in FIG. 1, the cylindrical case 13 has a large-diameter portion 13a disposed in the upper case 10, a small-diameter portion 13b disposed in the lower case 11, and an upper opening of the large-diameter portion 13a. And a large-diameter portion 13a.
Inside, an input shaft 20 connected to a drive shaft 18a of a drive motor 18 via a coupling 19 is provided at an upper portion, and the planetary roller type speed increasing device 12 is provided at a lower portion, and inside a small diameter portion 13b. , The output shaft 14 is provided.

The input shaft 20 is supported by a bearing housing 21 fixed to the upper portion inside the large diameter portion 13a via an upper bearing 22 and a lower bearing 23 using angular ball bearings.

As shown in FIG. 5, the planetary roller type speed increasing device 12 is provided with a plurality of planet pins 24 fixed to the lower end of the input shaft 20 and a needle bearing 25 on each of the planet pins 24. A planetary roller 26, a fixing ring 27 disposed on the outer periphery of each planetary roller 26 and fixed to an upper portion of a step 13 d of the large diameter portion 13 a and the small diameter portion 13 b of the cylindrical case 13, and a center of each planetary roller 26. And a sun shaft 28 disposed at the center.

The sun shaft 28 has a planetary roller 2
Roller 28a in contact with the female joint 6
b are formed, and a lubricating oil supply passage 28c passing through the axis from the upper end surface is formed to penetrate therethrough.

The sun shaft 28 and the output shaft 14 are connected via a joint 29 as shown in FIGS. The joint 29 has a male joint part 29a,
29b, and the upper male joint 29a is
8 and the lower male joint 29b are fitted to the female joint 14a provided at the upper end of the output shaft 14, respectively.

The male joints 29a and 29b are formed as involute splines that have been crowned in the tooth trace direction and the tooth width direction, respectively, and the female joints 28b and the female joints 14a are formed as linear involute splines. Have been.

[0026]

The upper and lower end surfaces of the joint 29 are formed into smooth spherical surfaces, and the upper end surface has an oil groove 2 through which lubricating oil passes.
9d are formed radially.

The output shaft 14 has the female joint 14a at the upper end.
A snap ring 30 is provided on the upper part of the involute spline of the female joint portion 14a to prevent the joint 29 from coming off, and the lubricating oil discharge passages 14b, 14b open from the bottom of the female joint portion 14a to the outer peripheral surface. The output shaft insertion tube 16 is attached to a shaft protruding from the lower end of the cylindrical case 13.
a The oil-shielding cap 31 is provided to cover the upper outer periphery.

As shown in FIG. 1, the output shaft 14 includes an upper bearing 32 provided on the outer periphery of the female joint portion 14a above the small-diameter portion 13b of the cylindrical case 13, and an upper portion of the oil-shielding cap 31 provided on the small diameter of the cylindrical case 13. Lower bearing 3 disposed below portion 13b
3, a shaft protruding from the lower end of the cylindrical case 13 penetrates through the output shaft insertion tube 16a, protrudes from the lower end of the lower case 11, and a rotary disk 15 is attached to the front end. The upper bearing 32 and the lower bearing 33 use angular ball bearings in consideration of the thrust load.

As shown in FIG. 6, the upper bearing 32 has a contact angle α with a straight line A connecting the steel ball 32a and the contact points of the inner ring 32b and the outer ring 32c in the radial direction.
A reference contact point P at which the meshing pitch circle of the involute spline of the female joint portion 14a and the involute spline of the male joint portion 29b intersects on a line obtained by extending the straight line A in the direction of the axis C of the cylindrical case 13 is set to the male joint portion 29b. The involute spline is disposed at the center position of the tooth width B.

The lubricating oil in the lubricating oil tank 16 is supplied to each rotating part in the cylindrical case 13 by a lubricating oil supply circuit provided with an externally provided hydraulic pump, strainer, oil cooler and the like (not shown), and again. It is forcibly circulated to return to the lubricating oil tank 16.

As shown in FIG. 1, a lubricating oil supply passage 34 and a lubricating oil discharge passage 35, which form a part of a lubricating oil supply circuit and supply lubricating oil to each rotating part, are formed in the cylindrical case 13. Peripheral wall of large diameter portion 13a, step 13d, and small diameter portion 13b
Are formed in the peripheral walls of the respective members.

The lubricating oil supply path 34 opens an oil supply port 34a, to which a line from a hydraulic pump is connected, on the upper surface of the lid 13c. The lubricating oil discharge path 35 has a lubricating oil tank 16 at the lower end of the small diameter portion 13b. The opening 35a for dropping the liquid is opened.

On the inner surface of the cylindrical case 13, a supply port 34 b for supplying lubricating oil from the lubricating oil supply path 34 to the upper bearing 22 and the lower bearing 23 of the input shaft 20, and lubricating oil for the planetary roller type speed increasing device 12. Supply port 34c for supplying and output shaft 14
A supply port 34 d for supplying lubricating oil to the upper bearing 32 of the motor shaft and a supply port 34 for supplying lubricating oil to the lower bearing 33 of the output shaft 14.
e has been established.

On the inner surface of the cylindrical case 13, a discharge port 35 b from the oil sump 36 below the lower bearing 23 of the input shaft 20 is provided as a discharge port to the lubricating oil discharge path 35, opposite to the supply ports. A discharge port 35c from the oil sump 37 above the planetary roller type speed increasing device 12, a discharge port 35d from the oil sump 38 below the planetary roller type speed increasing device 12, and a discharge port 35e from the bottom of the oil sump 38. A discharge port 35f from the oil reservoir 39 below the upper bearing 32 of the output shaft 14 is provided.

The lubricating oil supplied from the oil supply port 34a to the lubricating oil supply path 34 is supplied to the bearings 22 and 23 of the input shaft 20 via the supply port 34b, enters the oil reservoir 36, and rotates the input shaft 20. The oil is discharged from the discharge port 35b to the lubricating oil discharge path 35 by centrifugal force.

The lubricating oil that has passed through the supply port 34c is supplied to the upper surface of the planetary roller 26 and enters the oil sump 37, and a portion of the oil passes through the inside of the needle bearing 25 and the planetary roller 2
6 flows to the oil sump 38 on the lower surface, a part of which goes to the outer peripheral side of the fixing ring 27 due to the centrifugal force of the planetary roller 26 rotating at high speed, and the inner peripheral groove 27 formed on the upper surface of the fixing ring 27.
a, the outlet 3 through the radial groove 27b and the outer circumferential groove 27c.
5c is discharged to the lubricating oil discharge path 35.

A part of the lubricating oil in the oil sump 37 passes through the lubricating oil supply passage 28c of the sun shaft 28 and from the oil groove 29d on the upper end surface of the joint 29 to the upper male joint portion 29a and the female joint portion of the sun shaft 28. 28b, and flows downward along the joint 29. The lower male joint 29b of the joint 29 and the female joint 1 of the output shaft 14
4a, a discharge passage 14b formed in the output shaft 14,
14b, an oil sump 39 below the upper bearing 32 of the output shaft 14.
The lubricating oil is discharged to the lubricating oil discharge path 35 through the discharge port 35f, and drops to the lubricating oil tank 16 from the discharge port 35a of the lubricating oil discharge path 35.

A part of the lubricating oil flowing into the oil sump 38 moves toward the outer peripheral side of the fixing ring 27 due to the centrifugal force of the planetary roller 26, and the inner peripheral groove 27 formed on the lower surface of the fixing ring 27.
d, the outlet 3 through the radial groove 27e and the outer peripheral side groove 27f.
5d is discharged to the lubricating oil discharge passage 35, and a part is
The oil is discharged to the lubricating oil discharge passage 35 from a discharge port 35e at the bottom of the bottom surface.

The lubricating oil passing through the supply port 34 d supplies the upper bearing 32 of the output shaft 14, and is supplied from the oil sump 39 to the discharge port 3.
5f, is discharged to the lubricating oil discharge path 35, and drops from the discharge port 35a of the lubricating oil discharge path 35 to the lubricating oil tank 16,
Further, the lubricating oil passing through the lubricating oil supply port 34 e is supplied to the lower bearing 33 of the output shaft 14 and drops into the lubricating oil tank 16.

The operation of the joint 29 in the rotary atomizer 1 thus configured will be described.

As shown in FIG. 7, the vibration caused by the natural vibration of the output shaft 14 mainly when passing through the primary and secondary resonance rotation speeds, or the vibration in the rotary disk 15 provided at the tip of the output shaft 14. When the output shaft 14 is inclined at an angle β with respect to the axis C of the cylindrical case 13 when forced vibration occurs due to uneven adhesion and hardening of the slurry or the like at the outer periphery of the female joint portion 14a at the upper end of the output shaft 14 The inner ring 32b of the upper bearing 32 provided at the upper side is inclined, and the steel ball 32a and the inner ring 32
The straight line A connecting the contact point of the outer ring 32b with the outer ring 32c is inclined at an angle β.

Due to this phenomenon, the reference contact point P between the female joint portion 14a and the male joint portion 29b slips, and the reference contact point P
Is the radius R from the point where the male joint portion 29b is formed as an involute spline that has been crowned in the tooth trace direction and the tooth width direction to the point P around the point O where the straight line A and the axis C intersect. Move to a point P 'on the arc.

By this sliding movement, the reference contact point between the female joint portion 14a and the male joint portion 29b is shifted to the left and right points P in FIG.
′ And P ′, so that the output shaft has an angle β
The joint 26 does not tilt when tilted. Therefore, since the sun shaft 28 does not tilt, the contact stress between the rollers is always uniform.

Next, as shown in FIG. 8, the eccentricity ε between the axis of the sun shaft 28 and the axis of the output shaft 14 caused by manufacturing errors and assembly.
If there is, the joint 29 is inclined at an angle γ with respect to the axis C of the cylindrical case 13.

The inclination of the joint 29 also causes the joint 29
The reference contact point between the upper male joint portion 29a and the female joint portion 28b of the sun shaft 28 and the reference contact point between the lower male joint portion 29b and the female joint portion 14a of the output shaft 14 only slide, and the sun shaft 28 tilts. The contact stress between the rollers is always uniform. Further, even if both the inclination and the eccentricity are present on the output shaft 14 at the same time, the inclination of the sun shaft 28 does not occur. The contact point is
Actually, it is a surface because it is elastically deformed by receiving a load.

Further, unlike the related art, the sun shaft is not integrally formed at the upper end of the output shaft, but the sun shaft 28, the joint 29, and the output shaft 1 are not formed.
Since it is divided into 4 parts, high-grade materials such as carbon steel and alloy steel for machine structure (for example, Ni-Cr-Mo steel such as SNCM616) stipulated by JIS, and members that require heat treatment Limited.

Further, even if the output shaft 14 is tilted as described above, or if the axis of the sun shaft 28 and the axis of the output shaft 14 are eccentric due to a manufacturing error or assembly accuracy, the sun shaft Since 28 does not tilt, the contact between the rollers is uniform, and no excessive load is applied to each bearing.
The manufacturing accuracy of each component including the input shaft 20, the output shaft 14, the cylindrical case 13, and the like can be reduced.

Further, by forming the joint portion in the form of an involute spline, it is easy to obtain a small size and strength, and it is easy to disassemble and assemble, so that the whole apparatus can be made compact.

FIGS. 9 and 10 show a second embodiment of the present invention. The cylindrical case 40 comprises an input shaft 42 and an upper cylindrical case 40a in which the planetary roller type speed increasing device 12 is disposed.
And a lower cylindrical case 40b on which the output shaft 14 is disposed, and the two cylindrical cases 40a, 40b are connected by bolts 41 so that the two cylindrical cases 40a, 40b can be attached and detached. The upper end 43a of the sun shaft 43 is supported at the center of the lower end via a bearing 44, and the joint 29 of the first embodiment is disposed between the sun shaft 43 and the output shaft 14.

FIG. 11 shows a third embodiment of the present invention. A cylindrical case 40 is composed of an upper cylindrical case 40a in which the input shaft 20 and the planetary roller type speed increasing device 12 are disposed.
And a lower cylindrical case 40b on which the output shaft 14 is disposed, and the two cylindrical cases 40a, 40b are connected by bolts 41 so that the two cylindrical cases 40a, 40b can be attached and detached. An upper end 45a of a sun shaft 45 is supported at the center of the lower end via a bearing 44, and a male joint portion 45b formed at the lower end of the sun shaft 45 as an involute spline subjected to a crowning process in a tooth trace direction and a tooth width direction. And the joint 4 connecting the sun shaft 45 and the output shaft 14
6, a female joint part 4 with which the male joint part 45b is fitted.
6a is formed at the lower end of the joint 46 with a male joint 46b formed as an involute spline which has been crowned in the tooth trace direction and the tooth width direction.
6b is fitted to the female joint portion 14a of the output shaft 14.

With the constructions of the second and third embodiments, the same effects as those of the first embodiment can be obtained, and the upper cylindrical case 40a and the lower cylindrical case 40b can be attached and detached. It is possible to easily disassemble and assemble the drive mechanism, change the speed increasing ratio and change the speed increasing device of a different type, for example, from a planetary roller type speed increasing device to a planetary gear type speed increasing device or vice versa. , The movement of the sun shafts 43, 45 in the axial direction is restricted, so that the contact surfaces of the sun rollers 43b, 45c and the planetary roller 26 are always the same. The durability of the device 12 can be improved, and a stable speed increasing function can be maintained.

Although each of the above embodiments has been described using the planetary roller type speed increasing device 12, the same operation and effect can be obtained by using the planetary gear type speed increasing device.

FIGS. 12 to 15 show a fourth embodiment of the present invention, in which an input shaft 42 and a planetary gear type speed increasing device 47 are disposed in an upper cylindrical case 40a of a cylindrical case 40. A lower cylindrical case 40b on which the output shaft 14 is disposed is connected to the lower part of the case 40a by bolts 41 so that the two cylindrical cases 40a and 40b are detachable, and an upper end 48a of a sun shaft 48 of a planetary gear type speed increasing device 47. Is supported at the center of the lower end of the input shaft 42 via a bearing 44 and the sun shaft 4
At the lower end of 8, a male joint portion 48b formed in an involute spline subjected to crowning processing in the tooth trace direction and the tooth width direction was formed, and the male joint portion 48b was fitted to the female joint portion 14a of the output shaft 14. Things.

The planetary gear type speed increasing device 47 includes a sun shaft 48.
A sun gear 48c is formed on the outer periphery of the upper shaft portion of the
A plurality of planet pins 49 press-fit into the lower end of
a plurality of planetary gears 50 meshing with the needle bearing 5
1, and a fixed ring 52 having an internal gear formed on the outer periphery of each planetary gear 50 is provided. The teeth of the sun gear 48c and the planetary gear 50 that mesh with each other are crowned in the tooth trace direction. Is given.

In this configuration, as shown in FIG. 14, when the output shaft 14 has a slope δ, as in the above-described embodiments,
Since the male joint 48b is formed as an involute spline that has been crowned in the tooth trace direction and the tooth width direction, the reference contact point P between the male joint 48b and the female joint 14a is formed.
The output shaft 14 only tilts by δ due to the sliding movement of
8 does not tilt, so that no excessive load acts on the planetary gear type speed increasing device 47.

Further, since the movement of the sun shaft 48 in the axial direction is restricted via the bearing 44, the meshing surface of the sun gear 48c and the planetary gear 50 is always the same in the axial direction, so that the wear of the meshing surface is reduced. Since it is uniform, durability is improved.

Further, as shown in FIG. 15, when there is an eccentricity ε between the axis of the sun shaft 48 and the output shaft 14, the reference contact point P between the male joint portion 48b and the female joint portion 14a.
The sun shaft 48 tilts by δ due to the sliding movement of
In between c and the planetary gear 50, the formation position of the sun gear 48c is from being formed at the position of the upper portion of the L ₂ relative to the overall length L ₁ of the sun shaft 48, the sun gear 48c and the planetary gear 5
The eccentricity ε ₁ between 0 is smaller than the eccentricity ε in the axis of the sun shaft 48 and the output shaft 14, and the teeth of both the sun gear 48 c and the planetary gear 50 are crowned. This eliminates one-sided contact and galling of the meshing surface, does not cause uneven wear of the tooth surface, smoothes the rotation and stabilizes the strength.

Further, since the sun shaft 48 and the output shaft 14 are divided, the material, heat treatment and processing accuracy of the output shaft 14 can be reduced to reduce the cost, and the upper cylindrical case 40a
And the lower cylindrical case 40b are detachable, so that it is easy to disassemble and assemble the drive mechanism during maintenance and inspection, change the speed increasing ratio, and change to a speed increasing device of a different type.

Although the fourth embodiment uses the planetary gear type speed increasing device 47, the same operation and effect can be obtained by using the planetary roller type speed increasing device.

[0061]

As described above, in the rotary atomizer of the present invention, a cylindrical case having a built-in speed-increasing device is detachably provided in a main body case, and an input shaft is provided in an upper portion in the cylindrical case, and a rotary shaft is provided in a lower portion in the cylindrical case. The output shaft, a speed increasing device is respectively disposed between the output shaft and the input shaft, the sun shaft and the output shaft of the speed increasing device are divided, and the sun axis and the output shaft are pivotably pivoted. Even if the output shaft is tilted due to the vibration due to the resonance of the output shaft or the forced vibration due to the eccentric mass due to the connection via the joint, the sun shaft does not tilt, so the rollers or gears are uniform. The contact is maintained by the stress, and the speed increasing device does not break down.

Furthermore, even if eccentricity occurs between the axis of the sun shaft and the output shaft due to manufacturing errors and assembly accuracy, or
Even if both tilt and eccentricity are present at the same time on the output shaft, no tilt of the sun shaft occurs, so the contact between rollers or between gears is uniform and is not affected by the speed increasing device.
No excessive load is applied to each bearing supporting the input shaft and the output shaft.

Moreover, since the sun shaft is not integrally formed at the upper end of the output shaft as in the conventional case but is divided into a sun shaft, a shaft coupling and an output shaft, high-grade materials and members requiring heat treatment are short. Since it is limited to the sun axis, it can be manufactured at low cost.

Therefore, it is possible to reduce the manufacturing accuracy of the whole parts including the input shaft, the output shaft, the cylindrical case and the like.

Further, by making the upper cylindrical case provided with the input shaft and the speed increasing device and the lower cylindrical case provided with the output shaft detachable, the drive mechanism can be disassembled / assembled during maintenance / inspection. The gear ratio can be easily changed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a drive mechanism according to a first embodiment of the present invention.

FIG. 2 is a partial sectional view of a rotary atomizer.

FIG. 3 is a front view of a rotary atomizer provided in a chamber.

FIG. 4 is a plan view of a rotary atomizer.

FIG. 5 is an enlarged sectional view of a joint connecting portion.

FIG. 6 is an enlarged sectional view showing a meshing state of a male joint and a female joint.

FIG. 7 is an enlarged sectional view showing a state where an output shaft is inclined.

FIG. 8 is an enlarged cross-sectional view showing a state where eccentricity has occurred between a sun shaft and an output shaft.

FIG. 9 is an enlarged sectional view of a joint connecting portion according to a second embodiment of the present invention.

FIG. 10 is an enlarged sectional view showing a state in which an upper cylindrical case and a lower cylindrical case are separated.

FIG. 11 is an enlarged sectional view of a joint connecting portion according to a third embodiment of the present invention.

FIG. 12 is an enlarged sectional view of a joint connecting portion according to a fourth embodiment of the present invention.

FIG. 13 is an enlarged sectional view showing a state where an upper cylindrical case and a lower cylindrical case are separated.

FIG. 14 is an enlarged sectional view showing a state where the output shaft is inclined.

FIG. 15 is an enlarged cross-sectional view showing a state where eccentricity has occurred between a sun shaft and an output shaft.

FIG. 16 is a sectional view of a conventional rotary atomizer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotary atomizer, 2 ... Chamber, 3 ... Body case, 12 ... Planetary roller type speed increasing device, 13 ... Cylindrical case, 14 ... Output shaft, 14a ... Female joint part of output shaft, 15 ...
Rotary disk, 20 ... input shaft, 28 ... sun shaft, 2
8b: Female joint of the sun shaft 28, 29: Joint, 29a, 2
9b: Male joint part of the joint 29, 40: Cylindrical case, 40a
... upper cylindrical case, 40b ... lower cylindrical case, 43 ... sun shaft, 44 ... bearing, 45 ... sun shaft, 45b ... sun shaft 45
Male joint part of 46, joint, 46a female joint part of joint 46, 46b male joint part of joint 46, 47 planetary gear type speed increasing device, 48 sun shaft, 48b male joint part of sun shaft 48

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 56-44245 (JP, U) Japanese Utility Model Showa 61-200933 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B05B 3/10 B01D 1/20

Claims (7)

(57) [Claims] An input shaft arranged vertically in a main body case, and an output shaft arranged below the input shaft and on the same axis as the input shaft are supported via bearings, respectively. A rotary atomizer having a planetary roller type or a planetary gear type speed increasing device disposed between an input shaft and the output shaft, the output shaft protruding from the lower end of the main body case, and a rotary disk provided at the lower end of the output shaft. in, detachable circular cylinder casing in the main body case, wherein the input shaft to the upper cylindrical casing, the output shaft within the lower cylindrical casing, between the output shaft and the input shaft the speed increasing device is disposed, respectively, and said output shaft and the sun shaft of the bulking speed device, the teeth
Involute with crowning in the direction of the streaks and width of the teeth
Straight spline to the male joint formed on the straight spline.
A rotary atomizer characterized in that the rotary atomizer is swingably connected via a shaft coupling which is fitted to a female joint formed on a straight spline . 2. The male joint part is connected to upper and lower ends of a joint,
Connect the female joint to the lower end of the positive shaft and the upper end of the output shaft.
The male joint at the upper end of the joint is the female joint at the lower end of the sun shaft.
The male joint at the lower end of the joint to the female joint at the upper end of the output shaft.
The rotary atomizer according to claim 1, wherein the rotary atomizer is fitted with each other. 3. An upper end of a joint and an upper end of the output shaft.
The female joint is attached to the lower end of the sun shaft and the lower end of the joint.
Each joint is provided, and the female joint at the top of the joint is below the sun axis.
The male joint at the end and the male joint at the lower end of the joint are the female at the upper end of the output shaft.
2. The fitting according to claim 1, wherein the fittings are fitted to the joints.
Rotary atomizer . 4. The male joint at the lower end of the sun shaft,
The female joint is provided at the upper end of the output shaft,
The male joint at the lower end is fitted to the female joint at the upper end of the output shaft
The rotary atomizer according to claim 1, wherein: 5. An upper end of the sun axis is located at a lower end of the input axis.
2. The bearing according to claim 1, wherein the bearing is supported via a bearing.
The rotary atomizer according to any one of claims 1 to 4 . 6. The output shaft is supported on the cylindrical case.
The upper and lower bearings have steel balls between the inner and outer rings.
Angular ball bearings are used.
The straight line connecting the ball with the inner ring and the outer contact point is
Having a contact angle of
On the line extended in the axial direction, the female joint at the upper end of the output shaft
Male and female involute splines
The engagement pitch circle of the involute spline at the joint is
The intersecting reference contact point is defined as the involute sp
Be arranged so that it is at the center of the line tooth width.
The method according to any one of claims 1 to 5, wherein
Data atomizer . 7. The cylindrical case is connected to the input shaft and the extension.
An upper cylindrical case with a speed controller and the output shaft
Divided into a lower cylindrical case, and both cylindrical cases are removable
7. An apparatus according to claim 1, wherein
The rotary atomizer according to the item .