KR200334020Y1 - A accelerator planetary gear drive - Google Patents

Abstract

The present invention relates to an accelerator of a planetary gear unit, and its purpose is to provide an acceleration device on an input shaft to generate rotational acceleration, thereby increasing torque while maintaining a high rotational speed (RPM).

To this end, according to the acceleration device of the planetary gear unit according to the present invention, it is mounted on one end of the input shaft 21 of the sun gear 20 extending through the first carrier (40L) and rotates integrally with the input shaft 21 and predetermined It is mounted on the other end of the first rotating body 61 having a disk shape and the input shaft 21 of the sun gear 20 extending through the second carrier 40R to balance the first rotating body 61. A second rotating body 62 in the form of a rotating disk is included. As a result, the rotational acceleration is transmitted to the input shaft 21 of the sun gear 20 by the first and second rotational bodies 61 and 62, and the planetary gear 30 that is continuously idle moves to the second carrier 40R. There is an effect that can provide a large torque while maintaining the rotational speed (RPM) at a high speed on the output shaft (50). Therefore, there is an advantage that the planetary gear unit according to the present invention can be widely applied to a large reduction gear, a marine electric engine, a power generation facility, a next-generation electric vehicle engine, which require high torque and high speed rotation conditions at the same time.

Description

Accelerator of planetary gear unit {A ACCELERATOR PLANETARY GEAR DRIVE}

The present invention relates to a planetary gear unit, and more particularly, to an accelerator of a planetary gear unit capable of outputting high RPM and large torque by installing an accelerator on an input shaft.

In general, in a machine that uses power, such as a machine tool or a transmission of a car, in order to obtain the required speed and torque, the speed and torque of the input power may be changed by using the transmission without using the power transmitted from the power source. I use it. Such transmissions include devices using dignity and worm gears, and devices using disc friction cars. However, when the transmission is easily controlled and the transmission ratio is increased, many planetary gear units are used.

The planetary gear unit is a pair of interlocking gears, each of which rotates two gears, and one gear revolves about the axis of the other gear, decelerating the rotational speed and greatly increasing the torque. However, the internal structure of the conventional planetary gear unit is shown in FIG.

As shown in FIG. 1, the conventional planetary gear unit has an external gear 1 having an outer shape and a gear array formed thereon, and is disposed at the center of the internal gear 1 and rotated by a power source (not shown). A sun gear 2 provided with an input shaft 3, a plurality of planetary gears 4 arranged to engage between the sun gear 2 and an internal gear 1, and a shaft 5 of the planetary gears 4. The disc-shaped carrier 6 is disposed on the side of the internal gear 1 so that the end is coupled and rotates, and the output shaft 7 is provided on the center. Since the internal gear 1 is fixed, the planetary gears 3 rotate and revolve by the rotation of the sun gear 2.

Therefore, the rotational speed of the sun gear 2 is decelerated by the orbital motion of the planetary gears 4, and the carrier 6 is rotated by the orbital motion of the planetary gears 4. At this time, as the output shaft 7 of the carrier 6 is reduced in rotational speed than the input of the sun gear 2, the output is generated in a state where the torque is increased. That is, the input shaft 3 having high speed and low torque provides the low speed and high torque to the output shaft 7 through the planetary gears 4 that are idle.

However, since the torque is high in the conventional planetary gear unit, but the rotational speed (RPM) is considerably reduced, there is a limit to its use in a device that requires high torque and high-speed rotation conditions at the same time.

The present invention is to solve this problem; An object of the present invention is to provide an accelerator of a planetary gear unit capable of increasing torque while maintaining a high rotational speed (RPM) by improving an input shaft structure receiving power from a power source.

Figure 1 schematically shows a conventional planetary gear unit.

2 is an exploded perspective view of the planetary gear unit according to the present invention.

3 is a cross-sectional view taken along the line III-III of FIG. 2, showing the internal structure of the planetary gear unit according to the present invention.

4 is a perspective view showing an extract of the rotating body of the accelerator according to the present invention.

* Description of the symbols for the main parts of the drawings *

10. Internal gear 20. Sun gear 21. Input shaft

30. Planetary gear 40L, 40R. Carrier 50. Output shaft

60. Accelerator 61. First rotating body 62. Second rotating body

63.Boss 64.Bridge 65..Weight ring

The present invention for achieving this object is;

An internal gear provided in a ring shape and having gear teeth formed therein; A sun gear disposed at a center of the internal gear and connected to a power source on the center of the internal gear; a plurality of planetary gears arranged to be engaged between the sun gear and the internal gear and provided with a shaft on the center; A first carrier having one end of the shaft of the planetary gears coupled to the inner gear to rotate by the orbital motion of the planetary gears, the first carrier having a shaft through-hole perforated through one end of the input shaft of the sun gear; A planetary gear unit having a second carrier disposed on the other side of the internal gear such that shafts of the planetary gears are coupled to each other, and having an output shaft protruding from the center of the input gear while the input shaft of the sun gear passes through;

Acceler for generating rotational acceleration is installed on the input shaft of the sun gear;

The accelerator is mounted on one end of the input shaft of the sun gear extending through the first carrier, rotates integrally with the input shaft, and has a disk-shaped first rotating body and the other end of the input shaft of the sun gear extending through the second carrier. It is characterized in that it comprises a second rotating body of the disk shape rotated while being balanced to the first rotating body.

In addition, the first and the second rotating body is composed of a boss that is fitted to the input shaft of the sun gear, coupled to the bridge extending radially from the boss, and a weight ring connected along the edge of the bridge and having a predetermined thickness and diameter ; The weight of the first and second rotating bodies is biased to the edge portion so that the centripetal force is increased during rotation.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 2 and 3, the planetary gear unit according to the present invention includes an internal gear 10 having an outer shape and a ring shape, and a sun gear disposed at the center of the internal gear 10. (20; sun gear), a plurality of planetary gear (30) arranged to engage between the sun gear 20 and the internal gear 10, and the shaft 31 end of the planet gears 30 Combined and rotated to form a disk-shaped carrier 40R having an output shaft 50 on the center and an input shaft of a sun gear extending through the carrier 40L and 40R to generate rotational acceleration. Accelerator 60 is provided.

As described above, the internal gear 10 is manufactured in the form of a ring having a predetermined diameter and fixed to form an outer shape of the planetary gear unit, and a gear train 11 is formed along an inner circumference thereof, so-called "ring gear". It is also referred to as an "internal gear." (In the embodiment of the present invention, the gear train 11 of the internal gear 10 has advantages of low vibration and noise at high speed and smooth operation, and particularly, axial thrust). It is composed of a double helical gear that does not cause any problems, which may be configured as a single helical gear.)

The sun gear 20 is disposed at the center of the planetary gear unit, also referred to as "center gear". That is, the sun gear 20 is disposed axially in the center of the internal gear 10, and the input shaft 21 connected to the power source (not shown) is disposed on the center of the sun gear 20 to rotate integrally. (In the embodiment of the present invention, the sun gear 20 is also configured as a double helical gear.) Reference numeral '22' is an input gear disposed at one end of the input shaft 21 and connected to a power source.

The planetary gears 30 are arranged to engage between the sun gear 20 and the internal gear 10, and a shaft 31 is provided on the center portion. In order to install the shaft 31, a bearing 32 is disposed on the center of the planetary gear 30. Therefore, even when the shaft 31 is fixed, the planetary gear 30 is rotatable through the bearing 32. (In the embodiment of the present invention, the planetary gear 30 is also composed of a double helical gear.)

The carriers 40L and 40R are manufactured in a disk shape such that the ends of the shafts 31 of the planetary gears 30 are coupled to each other, and are disposed at both sides of the internal gear 10. That is, the carriers 40L and 40R are disposed on one side of the internal gear 10 (the left side of the internal gear 10 in FIG. 3), and one end of the shaft 31 of the planetary gears 30 is fitted into the disk. The first carrier 40L and the other end of the internal gear 10 (the right side of the internal gear 10 in FIG. 3) is disposed and the other end of the shaft 31 of the planetary gears 30 is fitted and coupled. It is distinguished by the second carrier 40R provided so that the output shaft 50 protrudes on the center part.

Shaft through holes 41 and 42 are drilled on the centers of the first and second carriers 40L and 40R so that the input shaft 21 ends of the sun gear 20 respectively pass through the shafts. The inside of the bearing 43 is installed to support the rotation of the input shaft (21). In addition, an output gear 51 is disposed on the output shaft 50 of the second carrier 40R, so that the output shifted through the output gear 51 is provided. Reference numeral 44 denotes a shaft coupling hole drilled at regular intervals in the first and second carriers 40L and 40R, and the shaft 31 of the planetary gears 30 has an end portion in the shaft coupling hole 44. (In the embodiment of the present invention, since three planetary gears 30 are applied, the shaft coupling holes 44 are perforated at intervals of 120 degrees.)

In addition, the outer circumferences of the first and second carriers 40L and 40R are rotatably supported by bearing members 12 fixedly disposed at both sides of the internal gear 10, thereby maintaining a constant speed. Rotating stably.

On the other hand, the accelerator 60 is for generating rotational acceleration in the sun gear 20, the first rotating body mounted on one end of the input shaft 21 of the sun gear 20 extending through the first carrier (40L) ( 61 and a second rotating body 62 mounted on the other end of the input shaft 21 of the sun gear 20 extending through the second carrier 40R, the detailed structure of which is as follows.

First, as described above, the first rotating body 61 is mounted on one end of the input shaft 21 of the sun gear 20 penetrating the first carrier 40L to rotate integrally with the input shaft 21 and to have a predetermined weight. It consists of a disk shape having.

The second rotating body 62 is mounted on the other end of the input shaft 21 of the sun gear 20 passing through the second carrier 40R, which is also formed in a disk shape having a predetermined weight and thus the first rotating body 61. It is rotated integrally with the input shaft 21 in balance with).

That is, as shown in FIG. 4, the first and second rotating bodies 61 and 62 have a boss 63 fitted to the input shaft 21 of the sun gear 20 and a radius of the boss 63. A bridge 64 extending in the direction and a weight ring 65 associated with the edge of the bridge 64. The boss 63, the bridge 64, and the weight ring 65 are integrally formed, and the weight ring 65 is configured to have a predetermined thickness t and a diameter d. Therefore, the weight of the first and second rotary bodies 61 and 62 is biased toward the edge portion, which is to increase the centripetal force during rotation. Reference numeral '66' denotes air holes drilled at regular intervals in the bridge 64. As the airflows are formed by the air holes 66, the first and second rotating bodies 61 and 62 are more remarkable. Rotates smoothly and maximizes heat dissipation.

Next will be described the operation and the resulting effects of the accelerator according to the present invention configured as described above.

First, when power of a power source is transmitted through the input gear 22, the sun gear 20 rotates together with the input shaft 21, and the sun gear 20 and the planetary gear 30 decoupled from the sun gear 20 rotate. At this time, since the planetary gears 30 are also engaged with the fixed internal gear 10, they rotate and revolve around the sun gear 20 at the same time.

At this time, although the rotation speed is slow due to the weight of the first and second rotating bodies 61 and 62 at the time of initial startup of the input shaft 21, the first and second rotating bodies 61 ( The acceleration of rotation is generated by the weight of 62), whereby the rotational speed of the sun gear 20 is maintained at a high speed, as well as having a high torque.

In addition, the planetary gear 30 also rotates and revolves at high speed due to a foreign object with the sun gear 20 having high speed and high torque. In addition, the first and second carriers 40L and 40R rotate by the orbiting motion of the planetary gear 30. The first and second carriers 40L and 40R also rotate at high speed and exhibit high torque. That is, a large torque is released from the output shaft 50 of the second carrier 40R while maintaining the high speed.

This phenomenon results in the centripetal force being exerted as the first and second rotary bodies 61 and 62 disposed at both ends of the input shaft 21 are exerted at high speed, and the centripetal force is the acceleration of rotation to the sun gear 20. Because it works. As a result, the sun gear 20 has high speed and high torque, and the planetary gears 30 engaged with the sun gear 20 and revolve provide high speed and high torque to the output shaft 50 of the second carrier 40R. .

As described in detail above; According to the accelerator of the planetary gear unit according to the present invention; It is mounted on one end of the input shaft of the sun gear extending through the first carrier and rotates integrally with the input shaft, and is mounted on the first rotating body of a disk shape having a predetermined weight and the other end of the input shaft of the sun gear extending through the second carrier. It includes a disk-shaped second rotating body rotating in balance with the first rotating body. As a result, the rotational acceleration is transmitted to the input shaft of the sun gear by the first and the second rotating bodies, and the planetary gear that continuously rotates can provide a large torque while maintaining the rotational speed (RPM) at a high speed on the output shaft of the carrier. It works. Therefore, there is an advantage that the planetary gear unit according to the present invention can be widely applied to a large reduction gear, a marine electric engine, a power generation facility, a next-generation electric vehicle engine, which require high torque and high speed rotation conditions at the same time.

Claims (2)

An internal gear provided in a ring shape and having gear teeth formed therein; A sun gear disposed at a center of the internal gear and having an input shaft connected to a power source on the center of the internal gear; A plurality of planetary gears disposed to be engaged between the sun gear and the internal gear, the shaft being provided on a central portion thereof; A first carrier having one end of the shaft coupled to the planetary gears and being disposed at one side of the internal gear to rotate by the orbiting motion of the planetary gears, and having a shaft through-hole formed therein so as to penetrate one end of the input shaft of the sun gear; A planetary gear unit having a second carrier disposed at the other side of the internal gear such that shafts of the planetary gears are coupled to each other, and having an output shaft protruding from the center of the input gear while the other end of the input shaft passes through the output shaft; An acceleration device 60 for generating rotational acceleration is installed on the input shaft 21 of the sun gear 20; The accelerator device 60; The first rotating body 61 of a disc shape having a predetermined weight by being mounted on one end of the input shaft 21 of the sun gear 20 extending through the first carrier 40L and integrally rotating with the input shaft 21. ) And a disk-shaped second rotating body which is mounted on the other end of the input shaft 21 of the sun gear 20 extending through the second carrier 40R and rotates in balance with the first rotating body 61. And (62) an accelerator of the planetary gear unit. The method of claim 1, The first and second rotary bodies 61 and 62 are bosses 63 inserted into and coupled to the input shaft 21 of the sun gear 20 and bridges 64 extending radially from the bosses 63. And a weight ring 65 associated with the edge of the bridge 64 and having a predetermined thickness t and diameter d; Accelerator of the planetary gear unit, characterized in that the weight of the first and second rotary bodies (61) (62) is biased to the edge portion so that the centripetal force is increased during rotation.