JP3411996B2 - Transmission mechanism unit for rotating equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention incorporates a planetary gear unit in a cylindrical housing having a small DC motor as a power source detachably fixed to one side, and operably connects the motor and the planetary gear unit. And the whole is a single unit,
For example, the present invention relates to a transmission mechanism unit for a rotary device that can be used as a drive / transmission device for a small rotary device such as a rotary pump.

[0002]

2. Description of the Related Art Conventionally, when a small direct current motor is used as a power source for a small rotating device such as a rotary pump, a method for operatively connecting both is generally a drive shaft of the motor and an output shaft of the rotating device. Was directly connected via a shaft joint such as a flange joint.

[0003]

When two shafts are connected using, for example, a flange joint and joint bolts, "centering" by the joint surface is indispensable. This centering requires a measuring instrument such as a straight line ruler. It must be carried out sufficiently accurately by using it, and not only it is troublesome, but if it is carried out incorrectly, it causes harmful effects such as generation of vibration, heating of the bearing, seizure of metal and the like.

[0004] Therefore, the present inventor has previously by coupling the joint of the drive shaft of the joint and the rotation device of the output shaft of the motor in the knitting sets line, even if there is difference in level between the two axes in the direct A joint device that can be used has been proposed (see, for example, Japanese Utility Model Publication No. 51-27390 and Japanese Utility Model Publication No. 52-20608). However, in these joint devices, when the motor power is transmitted, the braided wire as the biaxial connecting means expands and contracts, causing the connecting part to cause a "conical motion" or a "rising motion". As a result, it turned out that the same adverse effect as in the case of inaccurate centering described above may occur in the end.

Furthermore, when the two-axis direct connection system is used and a small direct current motor is used as a power source, its capacity is limited, so when the load on the rotating equipment side increases to a certain extent or more, The load is applied to the motor to cause an unreasonable result, and the motor itself tends to be burned. This tendency is particularly often seen when, for example, the rotating device requires a relatively large rotational torque for its operation such as a hydraulically driven gear pump that requires a relatively high discharge pressure.

[0006] The main object of the present invention is to eliminate the above-mentioned disadvantages or drawbacks found in the conventional technology, can be connected easily operate the rotating device is a driven device, moreover capacity is limited It is an object of the present invention to provide a transmission mechanism unit for rotating equipment configured to maximize the performance of a small DC motor.

[0007]

In order to achieve the above-mentioned object, in a transmission mechanism unit for a rotary machine according to the present invention, a partition is provided inside a cylindrical housing to divide the housing into two compartments. A small DC motor is detachably fitted and fixed in one section, and a planetary gear unit operatively connected to the motor is built in the other section, and the planetary gear unit protrudes to one side of the rotation transmission member. A drive pinion fixed to the output shaft of the motor while internally contacting the internal gears provided on the inner peripheral surface of the cylindrical housing with planetary gears respectively loosely fitted to the plurality of support shafts provided. And the other side of the rotation transmitting member,
A joint is provided to connect the drive shaft of a small rotating device, and the rotation of the output shaft of the motor is reduced through the planetary gear device on the drive shaft of the rotating device connected to the joint. And transmit it, and
A characteristic feature is that a plurality of mass bodies for increasing inertia, each having a specific gravity larger than that of the material, are implanted in appropriate places of the rotation transmitting member.

The rotation transmitting member is provided with a shaft insertion hole in the central portion on the side where the support shaft is projected for the reason described later, and the shaft insertion hole is loosely fitted in the front half of the output shaft of the motor. It is desirable to let

Further, the joint portion may be formed as a boss-like protrusion capable of engaging and locking the tip portion of the drive shaft of the small rotating machine.

Further, the cylindrical housing, the planetary gear and the drive
Rain anion is a synthetic resin molded respectively, internal gear,
The rotation transmitting member is formed of synthetic resin except for the support shaft of the planetary gear and the inertia increasing mass, and the supporting shaft and the inertia increasing mass are made of brass. It is preferable to integrally form such an alloy.

Further, it is preferable to provide a mounting means for fixing the transmission mechanism unit to a small rotating device on the other side of the cylindrical housing to which a small DC motor is detachably fixed on one side.

Further, it is preferable that a synthetic resin cover having a circular opening at a central portion surrounding the boss-like projection with a slight gap is fitted into the other opening of the cylindrical housing.

[0013]

When the drive shaft of the rotating device is connected to the joint portion of the rotation transmitting member and the motor is started with the tubular housing fixed, the rotation of the motor is decelerated by the planetary gear device, and the rotation as the driven device is achieved. Transmits large rotational torque to the drive shaft of rotating equipment. In addition, since a plurality of mass bodies for increasing inertia having a specific gravity larger than that of the material are implanted in the rotation transmission member, the rotation transmission member itself acts as a flywheel having a large moment of inertia. Therefore, the rotational torque is transmitted smoothly and uniformly.

[0014]

EXAMPLES Examples of the present invention will be described below in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of the present invention. In the transmission mechanism unit U in this embodiment, a partition wall 3B is provided inside the cylindrical housing 3 to divide the housing into two compartments, and a small DC motor is fitted in one compartment and detachable with screws 2 or the like. And a planetary gear unit P operatively connected to the motor 1 in the other section. The planetary gear unit P is located at the same angular position on one side of the rotation transmitting member 4. Three protruding shafts 5
The planetary gears 6 loosely fitted in the inner peripheral surface of the cylindrical housing 3 are respectively inscribed in the inner toothed gears 7 annularly, and the planetary gears 6 fixed to the output shaft 1A of the motor 1 are also inscribed. The drive pinions 8 having smaller diameters are engaged with each other. Wherein the rotation transmission member 4, on the side opposite to the side which projects the shaft 5, for example, a joint portion which is adapted to connect the drive shaft 9 of such a rotary pump small rotating device P (see FIG. 7) 10 is provided, and by connecting the drive shaft 9 of the rotating device R to the joint portion 10, the drive shaft 9 is connected to the drive shaft 9 via the planetary gear unit P.
The rotation of the output shaft 1A of the motor can be decelerated and transmitted at a constant reduction ratio. Further, since the rotation transmitting member 4 also acts as a flywheel, the rotation transmitting member 4 has substantially the same angular position on the same circumference in the vicinity of the outer periphery thereof, that is, in the illustrated example, it is almost the same. Three mass bodies 1 for increasing the inertia 1 whose specific gravity is heavier than the material of the rotation transmitting member 4 at the corners of the equilateral triangular plate-like portion 4
1 is planted respectively.

Further, a shaft insertion hole 12 is formed in the center of the rotation transmitting member 4 on the side where the support shaft 5 is projected, and the shaft insertion hole 12 is formed in the front half of the output shaft 1A of the motor 1. Is loosely fitted in. Further, in the illustrated example, the joint portion 10 of the rotation transmitting member 4 is adapted to be able to engage and lock the tip portion 9'of the drive shaft 9 of the rotating device which is the driven device. The drive shaft 9 includes a boss-shaped projection 14 having a locking hole 13 provided coaxially with the shaft insertion hole 12.
The drive shaft 9 can be connected only by fitting and locking the tip portion 9 ′ of the drive shaft 9 in the locking hole 13.

In the illustrated example, the cylindrical housing 3,
The planetary gear 6 and the drive pinion 8 are respectively molded of synthetic resin, the internal gear 7 is integrally molded with the cylindrical housing 3, and the rotation transmission member 4 is also the support shaft 5 of the planetary gear and the inertia increasing mass body. All are made of synthetic resin except 11,
The support shaft 5 and the inertia increasing mass body 11 are integrally formed of an alloy such as brass having a ratio higher than that of a synthetic resin, and the portion of the inertia increasing mass body 11 of both integrally formed is
As shown in FIG. 3, it is integrally implanted in the synthetic resin main body portion of the rotation transmitting member 4.

The other end of the cylindrical housing 3, that is,
Opening 3A on the side opposite to the side to which the motor 1 is fixed
Around the periphery, mounting means for fixing the transmission mechanism unit U to the small rotating device R which is a driven device is provided. In the illustrated example, this mounting means is a rotating device R.
Is a selvage piece 16 having screw insertion holes 15 respectively provided corresponding to a plurality of synthetic resin bosses RB arranged on the side where the drive shaft 9 protrudes. By aligning with the mounting boss RB ′ and screwing the screw 17 from the outside of the ear piece 16 through the screw insertion hole 15 into the boss hole RB ′, the transmission mechanism unit U is forcibly screwed.
Can be easily attached to the rotating device R.

4 to 7 show another embodiment of the present invention. In the transmission mechanism unit U'in this embodiment, which is configured as described above, the boss-shaped projection forming the joint portion 10 of the rotation transmission member 4 is provided in the other side opening 3A of the cylindrical housing 3. It is characterized in that a synthetic resin cover 19 having a circular opening 18 which surrounds 14 with a slight annular gap C1 provided in the center is fitted.

The cover 19 has, on one side thereof, an annular projecting edge 20 and a truncated cone-shaped projecting section 21 which can be elastically engaged with the inner peripheral surface of the opening 3A of the cylindrical housing 3. The circular opening 18 described above is formed at the center of the protrusion 21 (see FIG. 6). Reference numeral 22 is a mounting boss penetrating the screw insertion hole 23, and 24 is an annular spacer provided with a notch 25.

The boss-like projection 14 is concentric with the boss 14 and has a large diameter as shown in FIGS. 4 and 6.
4A, the cover 19 is inserted into the cylindrical housing 3
When fitted into the opening 3A of the circular base 14A, in addition to the slight annular gap C1 between the boss-like protrusion 14 and the peripheral surface 18 'of the circular opening 18, as shown in FIG. A slight annular gap C2 is also formed between the annular front surface 14B and the annular top surface 21 'of the frustoconical projection 21 described above.

The transmission mechanism unit U'in which the cover 19 is thus fitted is, as such, the cover 19 itself.
When fixed not only can be prevented from entering such as dust into the interior mechanism, this example the gear pump R as small rotating equipment from by that outside, said cover 19
Is a partition wall interposed between the two to prevent the inflow of the leaked liquid from the pump side and to discharge the leaked liquid through the notch 25, and during operation,
It acts as a kind of radial bearing of the boss-like projection 14 of the rotation transmitting member 4 to smooth the rotation of the rotation transmitting member 4 and, when it slides in the direction of the rotating device R, of the circular base 14A thereof. Since the annular front surface 14B comes into contact with the annular top surface 21 'of the frustoconical projection 21 of the cover 19 to prevent further sliding, it also functions as a kind of slide bearing for the rotation transmitting member 4. Run.

The synthetic resin as the molding material of the cylindrical housing 3, the planetary gears 6 and the drive pinion 8 has moldability, machinability, dimensional stability, abrasion resistance, heat resistance, self-lubricity, etc. A good material, for example, an acetal resin is suitable, and as a molding material for the main body portion of the rotation transmitting member 4,
A high-strength material, such as a polyimide resin or a reinforced nylon resin, which can sufficiently withstand a mechanical load received during transmission of a rotational torque is suitable. If the drive pinion 8 is molded from the synthetic resin as described above, the drive pinion is simply elastically press-fitted into the output shaft 1A of the motor 1.
It can be firmly fixed to A, and its mounting work becomes extremely easy.

In the transmission mechanism unit according to the present invention, the motor 1 has an outer diameter of about 2.9 cm and a main body length of about 4 cm.
cm, total weight: small commercial motor of about 80g [e.g., Mabuchimota RS-380PH (trade name) (Model symbol) series of things] can be used.
In this case, for example, the rotation speed at the maximum efficiency is 5280.
Use a up 13080r p m from rpm, when configured to decelerate its rotational speed to approximately 1 / 3-1 / 5, was found by is suitable for at least generally small gear pumps experiment ing.

Since the present invention is constructed as described above, it has the following effects.

In the transmission mechanism unit according to claim 1,
It can be easily operatively connected to a small rotating device as a driven device, and the rotation of the small DC motor is decelerated by the planetary gear device. Therefore, a large rotating torque should be transmitted to the drive shaft on the rotating device side. On the other hand, since a plurality of mass bodies for increasing the inertia are attached to the rotation transmitting member, the rotation transmitting member itself acts as a flywheel having a large moment of inertia, and the rotation torque is smooth and uniform. Can be transmitted, and the performance of a small DC motor with limited capacity can be maximized.

In the transmission mechanism unit of claim 2,
Since the shaft insertion hole formed in the center of the rotation transmitting member on the side where the support shaft is projected is loosely fitted in the front half of the output shaft of the motor, the rotation transmitting member rotates about the output shaft as the center of rotation. Therefore, the motor power can be smoothly rotated without causing "conical motion" or "miseratory motion" during transmission of the motor power.

In the transmission mechanism unit of claim 3,
Since the joint portion of the rotation transmitting member is formed of a boss-like projection having a locking hole that allows the tip of the drive shaft on the rotating device side to be fitted and locked, the tip of the drive shaft is locked. The rotary device and the transmission mechanism unit can be operatively connected by simply engaging and locking the stop hole.

In the transmission mechanism unit of claim 4,
Since most of the constituent elements of the planetary gear device are made of synthetic resin, they can be manufactured easily and can be provided at low cost.

In the transmission mechanism unit of claim 5,
Since the attachment means for fixing the transmission mechanism unit to the small rotating device is provided on the other side of the cylindrical housing to which the small DC motor is detachably fixed, the attachment to the rotating device is facilitated.

In the transmission mechanism unit of claim 6,
A circular opening that surrounds the boss-like projection that forms the joint of the rotation transmission member with a slight annular gap in the other side opening of the cylindrical housing in which a small DC motor is detachably fitted and fixed to one side Since the synthetic resin cover provided on the portion is fitted, the peripheral surface of the circular opening acts as a kind of radial bearing of the boss-like projection, so that the rotation transmitting member can rotate smoothly.

In the transmission mechanism unit of claim 7,
When the transmission mechanism unit is fixed to a small rotating device, the synthetic resin cover is designed to serve as a partition wall interposed between the two, so when the rotating device is a rotary pump such as a gear pump, It is possible to prevent the leaked liquid from entering from the pump side and protect the internal mechanism.

In the transmission mechanism unit of claim 8,
Since the rotating device is a rotary pump such as a gear pump, a portable electric rotary pump that can be used for various purposes can be configured by connecting both.

[Brief description of drawings]

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

FIG. 2 is a front view of a state where the constituent members of the embodiment of FIG. 1 are assembled.

FIG. 3 is a partially longitudinal side view of FIG.

FIG. 4 is an exploded perspective view of another embodiment of the present invention.

5 is a perspective view showing a state in which the constituent members of the embodiment of FIG. 4 are assembled.

FIG. 6 is a partially longitudinal side view of FIG.

FIG. 7 is a perspective view showing a mode of attachment of the transmission mechanism unit shown in FIG. 5 to a rotating device.

[Explanation of symbols]

U transmission mechanism unit U'transmission mechanism unit I Small DC motor IA output shaft 3 tubular housing 3A opening P planetary gear unit 4 Rotation transmission member 5 spindles 6 planetary gears 7 Internal gear 8 drive pinion R Small rotating equipment 9 Drive shaft for small rotating equipment 10 Joint part 11 Mass body for increasing inertia 12 shaft insertion hole 13 Locking hole RB mounting boss RB 'Boss hole 14 Boss-shaped protrusion 14A circular base 15 screw insertion hole 16 ear pieces 17 screws 18 circular opening 19 Synthetic resin cover 20 annular tongue 21 truncated cone-shaped protrusion C1 annular gap 22 Mounting boss 23 screw insertion hole 24 annular spacer 25 notches

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-51-91463 (JP, A) JP-A-62-228737 (JP, A) JP-A-63-214545 (JP, A) JP-A-63- 214546 (JP, A) JP 63-246533 (JP, A) JP 1-316550 (JP, A) JP 2-22635 (JP, A) JP 2-245544 (JP, A) JP-A-3-51554 (JP, A) Actual opening Sho 48-4507 (JP, U) Actual opening Sho 50-78872 (JP, U) Actual opening Sho 53-107731 (JP, U) Actual opening Sho 63-137151 (JP, U) Actual opening Sho 64-35237 (JP, U) Actual opening flat 1-146043 (JP, U) Actual opening flat 1-146046 (JP, U) Actual opening flat 2-148468 (JP, U) (JP, U) 58) Fields investigated (Int.Cl. ⁷ , DB name) F16H 1/28 F16F 15/30 F16H 57/02 H02K 7/116

Claims (8)

(57) [Claims] 1. A partition is provided inside a tubular housing to divide the housing into two compartments, a small DC motor is detachably fitted and fixed in one compartment, and the motor is operated in the other compartment. A planetary gear device connected to each other is built in, and the planetary gear device has a planetary gear that is loosely fitted to a plurality of support shafts protruding from one side of the rotation transmission member, on the inner peripheral surface of the other section. The internal gear may be inscribed in each of the provided internal gears, and the drive pinions fixed to the output shaft of the motor may be meshed with each other, and the drive shaft of the small rotating device may be connected to the other side of the rotation transmission member. A joint part is provided, and the rotation of the output shaft of the motor is decelerated and transmitted to the drive shaft of the rotating device connected to the joint part via the planetary gear device; and Rotation transmission part Transmission mechanism unit for rotary components, characterized in the place to below its material specific gravity heavier plurality of inertial increased masses that were implanted, respectively. 2. The transmission mechanism unit for rotating equipment according to claim 1, wherein a shaft insertion hole is bored in a central portion of the rotation transmission member on the side where the support shaft is projected, and the shaft insertion hole is formed into a small DC motor. A transmission unit characterized by being loosely fitted to the front half of the output shaft of the transmission . 3. The transmission mechanism unit for rotating equipment according to claim 1 or 2, wherein the joint portion of the rotation transmitting member adapted to connect the drive shaft of the small rotating equipment to the drive shaft. A transmission mechanism unit comprising a boss-shaped projection having a locking hole adapted to be fitted and locked at a tip portion. 4. A transmission for a rotating machine according to claim 1, 2 or 3.
In the dynamic mechanism unit, the tubular housing, the planetary gear and the drive pinion are respectively molded of synthetic resin, the internal gear is integrally formed with the tubular housing, and the rotation transmitting member is the support shaft and inertia of the planetary gear. A transmission mechanism unit, characterized in that the supporting shaft and the inertia increasing mass are integrally formed of an alloy such as brass, except for the increasing mass, which is made of synthetic resin. 5. A rotating device for transmission mechanism unit according to claim 1, 2, 3 or 4, the other side of the cylindrical housing which is removably fitted and fixed a small DC motor to one side, transmission <br /> A transmission mechanism unit comprising mounting means for fixing the mechanism unit to a small rotating device. 6. A transmission for a rotating machine according to claim 3, 4 or 5.
In the dynamic mechanism unit, a boss-shaped projection that constitutes the joint portion of the rotation transmission member is left in the other side opening of the cylindrical housing to which a small DC motor is detachably fitted and fixed on one side leaving a slight annular gap. A transmission mechanism unit characterized in that a synthetic resin cover having a circular opening surrounding the center portion is fitted. 7. The rotating device for transmission mechanism unit according to claim 6, a transmission mechanism unit when secured to the small rotating equipment, synthetic resin cover is configured to be interposed a partition wall between them A transmission mechanism unit characterized in that. 8. The rotating device according to claim 1, which is a rotary pump such as a gear pump.
The transmission mechanism unit according to the item.