JP2658666B2 - Planetary gear mechanism to increase or decrease the rotation speed of the input shaft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planetary gear mechanism for increasing and decreasing the rotation speed of an input shaft, which is suitable for use in, for example, an article pushing apparatus.

[0002]

2. Description of the Related Art Conventionally, as a gear mechanism for increasing and decreasing the rotation speed of an input shaft, there is a gear mechanism disclosed in Japanese Patent Application Laid-Open No. 2-1377. The gear mechanism includes an input shaft that is driven to rotate, a first helical gear provided on the input shaft,
A second helical gear meshing with the helical gear;
A drive that is operated in accordance with the rotation angle position of the output shaft linked to the helical gear and the input shaft, and moves the two helical gears relatively in the axial direction while maintaining the meshing state between the first helical gear and the second helical gear. Mechanism. According to the gear mechanism having the above structure, the torsion angle of the teeth of the helical gear is utilized only by relatively moving the first helical gear and the second helical gear relatively in the axial direction with respect to the rotation speed of the input shaft. The rotation speed of the output shaft can be continuously increased or decreased.

[0003]

However, since the above-mentioned gear mechanism utilizes the torsion angle of the teeth of the helical gear, the amount of increase or decrease in the rotational speed of the output shaft cannot be increased so much, and a large driving force cannot be obtained. Not suitable for transmission. In view of such circumstances, the present invention provides a planetary gear mechanism that can increase or decrease the rotation speed of the output side and that increases or decreases the rotation speed of the input shaft suitable for transmitting a large driving force. It is.

[0004]

That is, the present invention provides an input shaft that is driven to rotate, an input gear fixed to the input shaft, an output gear rotatably provided on the same axis as the input gear, and An oscillating plate rotatably provided on the same axis as the input gear; a planetary drive gear rotatably supported by the oscillating plate and meshed with the input gear; and a rotatably mounted on the oscillating plate. A planetary driven gear that is pivotally supported and meshed with the output gear and meshed with the planetary drive gear, and a swing mechanism that reciprocates the swing plate
And the swing mechanism swings freely on the frame.
The swing lever provided on the
Connected to the connection shaft and the input shaft
A cam member that is rotated by
The input shaft is engaged with the cam member and interlocked with the cam member.
A force for reciprocating the swing lever in accordance with the rotational angle position
It consists of Mufolowa .

[0005]

According to the above construction, the rotation of the input shaft is controlled by the input gear fixed to the input shaft, the planetary drive gear meshed with the input gear, the planetary driven gear meshed with the planetary drive gear, and the planetary driven gear. Ru is transmitted to the output gears is meshed.
At the same time, the cam member is interlocked with the input shaft
When rotated, a cam follower engages with the cam member.
The swing lever is reciprocated and swings, thereby connecting rod
The swinging plate is reciprocated swinging through. And the above shaking
When the moving plate is swung in the rotation direction of the input gear, the rotation speed of the planetary drive gear that is supported by the swinging plate and meshes with the input gear, more specifically, the rotation speed of the planetary drive gear, Stop or reverse. As a result, the number of rotations of the planetary driven gear and the number of rotations of the output gear can be reduced, stopped, or reversed. On the other hand, when the rocking plate is rocked in the direction opposite to the rotation direction of the input gear, the number of rotations of the planetary drive gear increases, so that the number of rotations of the planetary driven gear and the number of rotations of the output gear also increase.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. In FIG. 1, an input shaft 1 is rotatably supported on a frame 2 via a bearing 3 and is continuously driven by a motor (not shown). It is supposed to be. A sleeve 5 is integrally fixed to the outer periphery of the input shaft 1 via a key 4. An input gear 6 is fixed to the sleeve 5, and an output gear 8 is rotatably supported via a bearing 7. ing. In the illustrated embodiment, a sprocket 9 is integrally attached to the output gear 8, and the sprocket 9 is linked to a driven shaft via a chain (not shown). The input shaft 1 is rotatably supported by a disc-shaped oscillating plate 11 via bearings 10 at both sides of the input gear 6 and the output gear 8, respectively. 11 are integrally connected by a plurality of pins 12, and two planetary drive gears 13 and a planetary driven gear 14 are rotatably supported between the two swing plates 11. The two planetary drive gears 13 are arranged at diagonal positions of the disk-shaped swinging plate 11 (see FIG. 2), and mesh with the input gear 6 respectively. Further, two planetary driven gears 14 are also arranged at diagonal positions of the swing plate 11 at positions adjacent to the respective planetary driving gears 13 and are respectively meshed with the output gear 8 and with the planetary driving gear 13. (FIG. 2,
(See FIG. 3). Therefore, when the input shaft 1 is rotated counterclockwise in FIG. 2 with the rocking plate 11 fixed, the planetary drive gear 1 is rotated via the input gear 6 fixed thereto.
3 is rotated clockwise, and the planetary driven gear 14 meshed with the planetary drive gear 13 is rotated counterclockwise. The counterclockwise rotation of the planetary driven gear 14 causes the output gear 8 and the output gear 8 meshed with the planetary driven gear 14 to rotate.
Is rotated clockwise.

Next, a swinging mechanism 21 for reciprocatingly swinging the swinging plate 11 includes a shaft 22 fixed to the frame 2.
The swing lever 23 is pivotally supported at its base, and the tip of the swing lever 23 is connected to the swing plate 11 via a connecting rod 24 (see FIG. 3). Therefore, by swinging the swing lever 23 back and forth, the swing plate 11 can swing back and forth via the connecting rod 24. Further, a disk-shaped cam member 27 is fixed to a sleeve 26 fixed to the input shaft 1 via a key 25, and a cam groove 27a formed in an outer peripheral portion of an end face of the cam member 27 is used to swing the rocking member. The cam follower 28 attached to the lever 23 is engaged. The cam curve of the cam groove 27a has a section in which the swing plate 11 swings in the rotation direction of the input gear 6, that is, in the counterclockwise direction. At this time, when the rotation speed of the oscillating plate 11 is lower than the rotation speed of the input gear 6, the number of rotations of the planetary drive gear 13 meshed with the input gear 6 is reduced based on the case where the oscillating plate 11 is fixed. When the rotation speed of the swinging plate 11 and the rotation speed of the input gear 6 are the same, the rotation of the planetary drive gear 13 stops, and the rotation speed of the swinging plate 11 is further reduced to the rotation speed of the input gear 6. If it is larger than this, the planetary drive gear 13 rotates in the reverse direction. In particular, if the planetary drive gear 13 is reversed, the planetary driven gear 14
And the output gear 8 is also rotated in reverse, so that the rotation amount of the planetary driven gear 14 revolved in the same direction by the counterclockwise rotation of the swing plate 11 and the planetary driven gear 14
If the amount of reverse rotation is matched, the rotation of the output gear 8 can be stopped. Further, the cam curve of the cam groove 27a is gradually increased in the clockwise direction at a constant speed following the section in which the swinging plate 11 is rapidly rotated in the counterclockwise direction at a speed higher than the rotation speed of the input gear 6. Oscillating the output gear 8 clockwise at a constant speed. Then, between the state where the output gear 8 is stopped and the state where the output gear 8 is rotated clockwise at a constant speed, a section where the rotation of the output gear 8 is smoothly increased, and a section where the output gear 8 is smoothly rotated. A section for reducing the rotation is provided. As described above, by appropriately setting the cam curve of the cam groove 27a, the rotation speed of the input shaft 1
The rotation speed of the output gear 8 can be increased or decreased according to the rotation angle position of the input shaft 1. Although the cam member 27 is provided on the same axis as the input shaft 1 in the above embodiment, the cam member 27 may be taken out of the input shaft 1 via a gear and the swing plate 11 may be swung from the outside. not good. Et al. Is,
In the above embodiment, each gear is constituted by a spur gear, but may be a bevel gear. In FIG. 1, instead of providing the sprocket 9, the input shaft 1 is connected to the input gear 6.
The output gear 8 is fixed to the output shaft, and the rotation of the output gear 8 is taken out from the output shaft. You can also

[0008]

As described above, according to the present invention, the rotation speed of the output gear can be continuously increased / decreased with respect to the rotation speed of the input shaft, and the conventional apparatus utilizing the torsion angle of the helical gear can be provided. As a result, it is possible to increase the amount of increase or decrease in the rotation speed of the output gear and to transmit a large driving force.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic left side view of FIG.

FIG. 3 is a view in the direction of the arrow III in FIG. 1;

[Explanation of symbols]

1. Input shaft 2. Frame 6.
Input gear 8 ... Output gear 11 ... Swing plate 13
... planetary drive gear 14 ... planetary driven gear 21 ... swing mechanism 23
... Swing lever 24 ... Connecting rod 27 ... Cam member 28
… Cam follower

Claims (1)

(57) [Claims] An input shaft that is driven to rotate, an input gear fixed to the input shaft, an output gear rotatably provided on the same axis as the input gear, and rotatable on the same axis as the input gear And a planetary drive gear rotatably supported on the rocking plate and meshed with the input gear, and a rotatably supported shaft on the rocking plate, and mounted on the output gear. A planetary driven gear meshed with the planetary drive gear; and a swinging mechanism for reciprocatingly swinging the swinging plate.
Swing lever provided on the arm and the swing lever
A connecting rod for connecting the swing plate to the swing plate;
A cam member rotated in conjunction with the force shaft, and the swing lever
And is engaged with the cam member and connected to the cam member.
Move the swing lever forward and backward according to the rotation angle position of the moving input shaft.
A planetary gear mechanism for increasing or decreasing the rotation speed of an input shaft, comprising a cam follower for reciprocating movement .