JPH112297A - Planetary gear device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with an internal gear in a planetary gear device so as to simplify its structure by constructing the planetary gear device of two elements consisting of a sun gear, which is fixed to a machine frame, and a hollow rotational plate housing a planetary gear which revolves around the sun gear while rotating. SOLUTION: A motor 2 is fixed on the inside of a machine frame 1, and a rotary shaft of the motor 2 is loosely inserted into a tube type projection part 3 protruded on the upper face of the machine frame 1. A sun gear 4 is fixed on the outside of the tube type projection part 3, and a rotary shaft 6 of a planetary gear 5, which is engaged with the sun gear 4 so as to revolve around it while rotating, is protruded outward from a circular hole 8 in a hollow rotational plate 7 fitted to the tube type projection part 3 rotationally. In the hollow rotational plate 7, the upper end is fixed to the rotary shaft of the motor 2 by means of a machine screw 9 so as to be supported in the tube type projection part 3 rotationally by means of a bearing member 10. Therefore, the hollow rotational plate 7 is turned when the motor 2 is driven, and the planetary gear 5 revolves around the sun gear 4 while rotating. Then, the rotary shaft 6, to which the planetary gear 5 is fixed, can be used as an output element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planetary gear device.

[0002]

2. Description of the Related Art A conventional planetary gear device comprises a sun gear, an internal gear, and several planetary gears supported by a planet carrier rotating coaxially with the sun gear and meshing with the sun gear and the internal gear. Therefore, there are drawbacks in that the structure is complicated and the production is troublesome and expensive.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned conventional disadvantages, and to greatly simplify the structure by removing an internal gear which is one of the conventional three elements. It is intended to provide an inexpensive planetary gear device that is easy to manufacture.

[0004]

The means of the present invention are as follows. The rotating shaft of the motor fixed in the machine frame is loosely inserted into the tubular protrusion protruding from the machine frame, meshes with the sun gear fixed to the tubular projecting portion, rotates around it, and rotates the rotating shaft of the planetary gear that revolves. The rotating shaft of the planetary gear is output as an output element by projecting outward from the circular hole of the hollow rotating disk that is rotatably mounted on the tubular protrusion, and rotating the hollow rotating disk fixed to the tip of the rotating shaft of the motor. That you did.

[0005] Further, a plurality of the planetary gears are provided, and the respective rotating shafts thereof are respectively protruded outward from a plurality of circular holes provided in the hollow rotary disk to form output elements.

[0006] Further, one of the plurality of planetary gears is rotated by the rotation shaft of the motor to rotate the hollow rotary disk, and the rotation shaft of each planetary gear is used as an output element.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIGS. 1 and 2 will be described. Reference numeral 1 denotes a machine frame that fixes the motor 2 inside.
The rotating shaft 2a is loosely inserted into a tubular projection 3 projecting from the upper surface of the machine frame 1. A sun gear 4 is fixed to the outside of the tubular protrusion 3, and the rotating shaft 6 of the planetary gear 5 that meshes with the sun gear 4, rotates around the sun gear 4, and revolves is rotatably mounted on the tubular protrusion 3. From the circular hole 8 of the hollow rotary disk 7. The hollow rotary disk 7 includes upper and lower divided rotary members 7a and 7b.
One of the divided rotating bodies 7a is fixed to the rotating shaft 2a of the motor 2 with screws 9, and the other divided rotating body 7b is rotatably fixed to the tubular projection 3 by a bearing member 10. Incidentally, reference numeral 11 in the figure denotes a bearing member for the rotating shaft 6 of the planetary gear 5, and 12 denotes a sealed packing.

In the embodiment shown in FIGS. 3 and 4,
Meshes with a sun gear 4 fixed to the tubular projection 3 of the machine frame 1,
Three circular holes provided on a hollow rotary disk 7 provided with three planetary gears 5 that rotate around and revolve, and each rotating shaft 6 is rotatably mounted on a tubular projection 3 by a bearing member 10. 8
More outwardly. A pulley 13 fixed to the rotating shaft 2 a of the motor 2 and a pulley 14 fixed to the rotating shaft 6 of one planetary gear 5 are connected by a belt 15. Therefore, when the motor 2 is driven, the hollow rotary disk 7 rotates, the planetary gear 5 revolves around the sun gear 4 while rotating, and the rotary shaft 6 is used as an output element. It can be used for various devices such as a stirrer and a stirrer.

[0009]

According to the present invention, the structure is very simple because it is composed of two elements, the sun gear fixed to the machine frame and the hollow rotary disk containing planetary gears that rotate and revolve around the sun gear. It is easy to manufacture and can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal front view

FIG. 2 is a plan view showing a state where a divided rotary body above a hollow rotary disk is removed.

FIG. 3 is a longitudinal sectional front view of another embodiment.

FIG. 4 is a plan view showing a state where a divided rotary body above a hollow rotary disk is removed;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine frame 2 Motor 2a Rotating shaft 3 Tubular protrusion 4 Sun gear 5 Planetary gear 6 Rotating shaft 7 Hollow rotating disk 7a Upper divided rotating body 7b Lower divided rotating body 8 Circular hole 9 Screw 10 Bearing member 11 Bearing member 12 Sealing Packing 13 Pulley 14 Pulley 15 Belt

Claims (3)

[Claims] 1. A planetary planet which is inserted in a rotating shaft of a motor fixed in a machine frame into a tubular projection projecting from the machine frame, meshes with a sun gear fixed to the tubular projecting member, rotates around the planetary gear and revolves around the planetary gear. The rotating shaft of the planetary gear is formed by projecting the rotating shaft of the gear outwardly from the circular hole of the hollow rotating plate rotatably mounted on the tubular projection and rotating the hollow rotating plate fixed to the tip of the rotating shaft of the motor. A planetary gear device comprising: 2. A sun gear fixed to the tubular projection is engaged with the sun gear.
2. The planetary planetary gear according to claim 1, wherein each of the plurality of planetary gears revolving around the planetary gear and revolving protrudes outwardly from a plurality of circular holes provided in the hollow rotary disk to serve as output elements. Gear device. 3. A plurality of rotating shafts of a motor fixed in a machine frame are loosely inserted into tubular projections projecting from the machine frame, mesh with sun gears fixed to the tubular projections, and rotate around and revolve around the sun gear. Each of the rotating shafts of the planetary gears is projected outwardly from a plurality of circular holes provided in a hollow rotating disk rotatably mounted on the tubular protrusion, and the rotating shaft of one planetary gear is rotated by the rotating shaft of the motor. A planetary gear device wherein the hollow rotary disk is rotated by rotating the planetary gears, and the rotation shaft of each planetary gear is used as an output element.