JP2002310260A - Driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device capable of rotating and driving a plurality of transmission gears by one driving gear rotated by a driving motor using one planetary gear, respectively, reducing the number of motors used to drive the driving gear, and thereby reducing cost. SOLUTION: The driving gear 2 is arranged at the center of a substantially circular pedestal 1 when viewed in a plane having a plurality of taper upper faces 1d, 1e, and 1f continuous with a plurality of radial step parts 1a, 1b, and 1c in the direction of circumference and having an adequate width. One planetary gear 3 meshing with the driving gear 2 is arranged on an upper face side of the pedestal 1, and a plurality of transmission gears 5, 6, and 7 are arranged in sections in the vicinity of an outer peripheral fringe of the pedestal 1. A slide member 8A slidable on the taper upper faces 1a, 1b, and 1c of the pedestal 1 is provided in a lower part of the planetary gear 3, the slide member 8A in the lower part of the planetary gear 3 meshing with the driving gear 2 is arranged at positions of the step parts 1a, 1b, and 1c in proper sections of the pedestal 1, and the planetary gear 3 is locked and fixed to rotate and drive the transmission gears 5, 6, and 7 at adequate positions by the rotation of the planetary gear 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a single planetary gear is used for rotation from a drive gear to move and rotate a plurality of transmission gears arranged on the movement locus of the planetary gear. The present invention relates to a driving device that can rotate and drive a transmission gear at any movement locus position.

[0002]

2. Description of the Related Art Conventionally, a structure in which one drive gear is rotated using a planetary gear to rotate a plurality of transmission gears is disclosed in, for example, Japanese Patent Laid-Open No. 5-246.
There is a paper separating and conveying device described in Japanese Patent Application Publication No. 561. This is shown in FIGS. 7 (a) and (b), FIGS. 8 (a) and (b), and FIG.
(A) As shown in (b), a paper feed roller 117 facing a paper path 113 communicating with the paper storage unit 112 and selectively driven in both forward and reverse directions by a rotary drive unit, and a contact / separation drive unit. Auxiliary rollers 121 and 122 which are movably arranged in the direction in which the paper feed roller 117 can come in contact with / separate from the paper feed roller 117 and transport the paper together with the paper feed roller 117, and drive the rotation driving means and the contact / separation drive means to separate and transport the paper. Control means for controlling the paper feed roller 1
17 is rotated in both forward and reverse directions to separate the sheets and convey only one sheet.

However, in this case, two planetary gears 133 and 134 as rotary driving means are required, and only one idle gear 135 is rotated by one planetary gear 133 to rotate a plurality of idle gears. Was not. Further, in a drive device using a conventional gear, it is general that only one drive gear drives and rotates a transmission gear using a planetary gear, and each drive system is separately arranged. There is a problem that a plurality of drive motors for rotating each drive gear are required, and the number of drive motors used is large, resulting in high cost.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and a plurality of transmission gears can be driven to rotate by using one planetary gear with one drive gear rotated by a drive motor. Therefore, one mechanism, one drive gear, and one planetary gear can drive a number of mechanical units, and the number of motors used to drive the drive gear can be reduced, thereby reducing costs. It is intended to provide a driving device.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and the invention according to claim 1 comprises a plurality of radial steps in a circumferential direction and these radial steps. A drive gear is arranged at the center of a pedestal having a substantially circular shape in plan view having a plurality of tapered upper surfaces at appropriate intervals connected to the step portion, and one planetary gear meshing with the drive gear is arranged on the upper surface side of the pedestal. A plurality of transmission gears that can mesh with the planetary gears are arranged near the outer peripheral edge of the pedestal, and a sliding member slidable on a tapered upper surface of the pedestal is provided below the planetary gears, and The planetary gear meshing with the gear is moved to a position of the transmission gear at an appropriate position by forward rotation of a drive gear, and a sliding member below the planetary gear is arranged at a step position at an appropriate position on the pedestal, Anti-rotating the drive gear Thereby, the planetary gear is locked and fixed at an appropriate stepped position, and further, by rotating the planetary gear, a transmission gear meshing with the planetary gear is rotationally driven. .

According to a second aspect of the present invention, the sliding member below the planetary gear is constituted by a bracket having a tapered lower surface having an inclination angle corresponding to the inclination angle of the tapered upper surface of the pedestal. And The invention according to claim 3 has a structure in which a telescopic spring is disposed on an upper surface of a sliding member below the planetary gear, and the sliding member is connected to a lower part of the planetary gear via the telescopic spring, When the sliding member slides on the tapered upper surface of the pedestal, the height of the tapered upper surface of the pedestal is absorbed by the telescopic spring, so that the planetary gear is always held at a constant height position. It is characterized by. The invention according to claim 4 is characterized in that the sliding member is constituted by a roller slidably attached to a lower end of a support leg projecting downward from a lower surface of the planetary gear.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a driving device according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view showing the structure of a driving device according to an embodiment of the present invention, FIG. 2 is an exploded view of a pedestal used in the driving device according to the embodiment, and FIG. 4 is a development view of a pedestal showing another example of the planetary gear in the drive device of the embodiment, FIG. 5 is a development view showing another example of the pedestal used in the drive device of the embodiment, and FIG. It is a development view of a pedestal which shows another example of a gear.

As shown in FIG. 3, the driving device according to the present embodiment has three radial steps 1a, 1b, 1c in the circumferential direction of a ring-shaped portion provided on the outer peripheral portion and these steps 1a,
Three tapered upper surfaces 1d, 1d of appropriate width connected to 1b, 1c
One drive gear 2 is arranged at the center of a base 1 having a substantially circular shape in plan view having the components e and 1f as shown in FIG. As shown in FIG. 3, the drive gear 2 is rotated by a drive motor (not shown) having a drive shaft inserted into a cylindrical portion 1z provided at the center of the pedestal 1. Further, one planetary gear 3 meshing with the drive gear 2 is disposed on the upper surface side of the pedestal 1 in a state of being supported by the plate-shaped connecting member 4.

In the vicinity of the outer peripheral edge of the pedestal 1, three transmission gears 5, 6, 7 which can mesh with the planetary gear 3 are arranged. The transmission gears 5, 6, 7 include, for example, gears for loading, chucking, and rotating a rotary tray in a disk drive. In addition, as shown in FIG.
Sliding member 8 capable of sliding on tapered upper surfaces 1d, 1e, 1f
A is provided. The sliding member 8A is configured by a bracket having a tapered lower surface 8a having an inclination angle corresponding to the inclination angles of the tapered upper surfaces 1d, 1e, and 1f of the pedestal 1.

The planetary gear 3 meshes with the drive gear 2.
Is moved to any one of the transmission gears 5, 6, and 7 by the forward rotation of the drive gear 2, and the sliding member 8A below the planetary gear 3 is moved.
Is arranged at the position of one of the steps 1a, 1b, 1c of the pedestal 1, and the planetary gear 3 is engaged with the position of any one of the steps 1a, 1b, 1c by rotating the drive gear 2 in the opposite direction. By stopping and fixing, and further rotating the planetary gear 3, any one of the transmission gears 5, 6, 7 meshing with the planetary gear 3 is rotationally driven.

Therefore, according to the driving device of the present embodiment,
A plurality of transmission gears 5, 6, 7 via one planetary gear 3 with one drive gear 2 rotated by a drive motor (in the present embodiment, for example, for loading in a disk drive,
(3 gears for chucking, rotation of the rotary tray, etc.) can be individually driven to rotate, and the number of motors for driving the drive gear 2 can be reduced, thereby reducing costs. can do.

In another example of the planetary gear 3 shown in FIG. 4, a telescopic spring 9 is provided on the upper surface of a sliding member 8B below the sliding member 8B. It has a continuous structure. When the sliding member 8B slides on the tapered upper surfaces 1d, 1e and 1f of the pedestal 1, the height of the tapered upper surfaces 1d, 1e and 1f of the pedestal 1 is changed by the expansion and contraction springs 9.
The planetary gear 3 is always kept at a fixed height position by absorbing the water. Therefore, according to this, since the planetary gear 3 can always be held at a constant height position, the meshing between the planetary gear 3 and the drive gear 2 and the meshing between the planetary gear 3 and the plurality of transmission gears 5, 6, 7 are performed. Can be maintained in a good state, and rotation transmission of each gear can be ensured.

The pedestal 1 shown in FIG.
d, 1e, and 1f are provided only in the vicinity of the steps 1a, 1b, and 1c, and between the base ends of the tapered upper surfaces 1d, 1e, and 1f and the lowermost parts of the steps 1a, 1b, and 1c. , Horizontal surfaces 1g, 1h, and 1i. According to this, there is an advantage that the sliding member 8A of the planetary gear 3 can smoothly slide on the horizontal surfaces 1g, 1h, and 1i of the pedestal 1 without resistance.

The planetary gear 3 shown in FIG. 7 has a sliding member 8C made of a rotatable roller at the lower end of a support leg 3a projecting downward from the lower surface thereof. According to this, since the tapered upper surfaces 1d, 1e, and 1f of the pedestal 1 can be slid by the sliding member 8C made of a roller, the resistance during the sliding can be reduced, and the sliding movement of the planetary gear 3 can be further improved. It can be smoother.

In the above embodiment, the transmission gear 5,
6 and 7, three steps 1a, 1b, and 1c of the pedestal 1 and three tapered upper surfaces 1d, 1e, and 1f connected thereto are described. However, the present invention is not limited to this. Needless to say, the present invention can also be applied to a case where a plurality or four or more pieces are provided, and the step portion of the pedestal and the tapered upper surface are provided at a plurality of places correspondingly.

[0016]

As described above, the first aspect of the present invention is a plan view substantially having a plurality of radial steps in the circumferential direction and a plurality of tapered upper surfaces at appropriate intervals connected to these steps. A drive gear is arranged at the center of the circular pedestal, one planetary gear meshing with the drive gear is arranged on the upper surface side of the pedestal, and a plurality of transmission gears meshable with the planetary gear are arranged near the outer peripheral edge of the pedestal. Then, at the bottom of the planetary gear,
A sliding member slidable on the tapered upper surface of the pedestal is provided, and the planetary gear meshing with the drive gear is moved to an appropriate position of the transmission gear by forward rotation of the drive gear, and a sliding member below the planetary gear is provided. Is arranged at an appropriate step position on the pedestal, and the drive gear is rotated in the opposite direction to lock and fix the planetary gear at the appropriate step position, and further rotate this planetary gear, Since the transmission gear meshing with the planetary gears is configured to be driven to rotate, the following effects can be obtained.

That is, a plurality of transmission gears can be driven to rotate using one planetary gear by one driving gear rotated by a driving motor, and one driving gear and one driving gear and one planetary gear can rotate each transmission gear. A large number of mechanisms can be driven, the number of motors used to drive the drive gear can be reduced, and costs can be reduced.

According to the second aspect of the present invention, the sliding member at the lower part of the planetary gear is constituted by a bracket having a tapered lower surface having an inclination angle corresponding to the inclination angle of the tapered upper surface of the pedestal. The planetary gear can be smoothly and reliably slid on the tapered upper surface of the pedestal while holding the planetary gear with the sliding member.

According to a third aspect of the present invention, there is provided a structure in which a telescopic spring is disposed on an upper surface of a sliding member below a planetary gear, and the sliding member is connected to a lower part of the planetary gear via the telescopic spring. When the sliding member slides on the tapered upper surface of the pedestal, the height of the tapered upper surface of the pedestal is absorbed by a telescopic spring, so that the planetary gear is always held at a constant height position. Since it can always be held at a fixed height position, the meshing between the planetary gear and the drive gear and the meshing between the planetary gear and the plurality of transmission gears can be maintained in a good state, and the rotation transmission of each gear can be reliably performed. can do.

According to a fourth aspect of the present invention, the sliding member is constituted by a roller rotatably slidably attached to a lower end of a support leg projecting downward from the lower surface of the planetary gear. Since the sliding member can slide on the tapered upper surface of the pedestal, the sliding resistance can be reduced, and the sliding movement of the planetary gear can be further smoothened.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a structure of a driving device according to an embodiment of the present invention.

FIG. 2 is a development view of a pedestal used in the driving device according to the embodiment of the present invention.

FIG. 3 is a perspective view of a pedestal used in the driving device according to the embodiment of the present invention.

FIG. 4 is a development view of a pedestal showing another example of the planetary gear in the driving device according to the embodiment of the present invention.

FIG. 5 is a development view showing another example of the pedestal used in the drive device according to the embodiment of the present invention.

FIG. 6 is a development view of a pedestal showing still another example of the planetary gear used in the drive device according to the embodiment of the present invention.

FIGS. 7 (a) and 7 (b) are schematic side views of a conventional sheet separating and conveying device in a sheet separating state.

FIGS. 8A and 8B are schematic side views of a conventional paper separating and conveying device in a paper conveying state.

9 (a) and 9 (b) show a conventional sheet separating and conveying device in FIG.
FIGS. 3A and 3B are schematic side views of the state of sheet conveyance after FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pedestal 1a, 1b, 1c Step part 1d, 1e, 1f Taper upper surface 2 Drive gear 3 Planetary gear 3a Support leg 5, 6, 7 Transmission gear 8A Sliding member 8B Sliding member 8C Sliding member composed of a roller 8a Tapered lower surface 9 Telescopic spring

Claims (4)

[Claims] 1. A drive gear is disposed at the center of a substantially circular base in a plan view having a plurality of radial step portions in a circumferential direction and a plurality of tapered upper surfaces at appropriate intervals connected to these step portions. One planetary gear that meshes with the pedestal is arranged on the upper surface side of the pedestal, and a plurality of transmission gears that can mesh with the planetary gear are arranged near the outer peripheral edge of the pedestal. A sliding member capable of sliding on the tapered upper surface of the pedestal is provided, and the planetary gear meshing with the drive gear is moved to an appropriate position of the transmission gear by forward rotation of the drive gear, and a lower portion of the planetary gear is moved. The sliding member is disposed at an appropriate step position on the pedestal, and the planetary gear is locked and fixed at an appropriate step position by counter-rotating the drive gear. To rotate Therefore, a drive device characterized in that a transmission gear meshing with the planetary gear is driven to rotate. 2. A sliding member at a lower portion of the planetary gear is constituted by a bracket having a tapered lower surface having an inclination angle corresponding to an inclination angle of a tapered upper surface of the pedestal. Drive. 3. A structure in which a telescopic spring is disposed on an upper surface of a sliding member below the planetary gear, and the sliding member is connected to a lower part of the planetary gear via the telescopic spring. When the sliding member slides on the upper surface, the height of the tapered upper surface of the pedestal is absorbed by the expansion and contraction spring, so that the planetary gear is always held at a constant height position. The drive device according to claim 1. 4. The sliding member according to claim 1, wherein the sliding member comprises a roller rotatably slidably attached to a lower end of a support leg protruding downward from a lower surface of the planetary gear. Drive.