JPH1163119A - Gear device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain dispersion of a backlash of gears. SOLUTION: A first gear (a driving gear) 1 is rotatably installed on a gear installing plate 4, and a second gear (a driven gear) 2 meshes with the first gear 1. The gear installing plate 4 is installed in a casing. A pin 6 protrusively arranged in the casing is arranged in the radial direction of the first gear 1 perpendicular to a straight line connecting the respective centers of the first and the second gears. An engaging hole 7 to engage with the pin 6 is formed in the installing plate 4, and a lever 8 is installed on the opposite side of the engaging hole 7 to the center of the first gear. The gear installing plate 4 is slightly rotated in the circumferential direction with the pin 6 as the center by pressing the lever 8 by a micrometer 9 installed in the casing, and a backlash of the gears is adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear device,
In particular, it relates to a gear backlash adjusting mechanism.

[0002]

2. Description of the Related Art In precision equipment such as a camera stabilizer, a gear and a motor are combined and a motor is incorporated in a servo system in order to stably hold a camera or the like in a predetermined posture. In such a gear device, variations in gear backlash greatly affect the performance of the gear device. However, at present, there is no method for quantitatively measuring the backlash. For example, in the gear device shown in FIG. 4, screws 5 for fixing the gear mounting plate 4 to the housing are used.
The backlash is adjusted by adjusting the distance L between the center of the drive gear 1 (rotated and driven by the motor 3) and each center of the driven gear 2 to adjust the backlash, and then the screw 5 is tightened. Was.

[0003] For this reason, the backlash of the gear device is likely to cause variation, and the performance of the device varies.

[0004]

[Means for Solving the Problems]

(1) A gear having a first gear rotatably mounted on a gear mounting plate and a second gear meshing with the first gear, wherein the gear mounting plate is mounted on an apparatus housing. Related to the device. In the present invention, the first gear is arranged in the radial direction of the first gear, which is perpendicular to a straight line connecting the centers of the first and second gears, and is formed on a pin protruding from the device housing and on a gear mounting plate. An engaging hole to be engaged, a lever attached to a gear mounting plate opposite to the engaging hole with respect to the center of the first gear, and a lever attached to the apparatus housing so as to be able to advance and retreat, and pressing the lever. Thus, a micrometer for adjusting the gear backlash by slightly rotating the gear mounting plate around the pin in the circumferential direction is provided.

(2) In the invention of claim 2, in the above (1), the first gear is a drive gear and the second gear is a driven gear. (3) In the invention of claim 3, in the above (2), a third gear rotated and driven by the motor is mounted on the gear mounting plate, and the third gear meshes with the first gear and is driven to rotate.

(4) In the invention of claim 4, in the above (2) or (3), the motor for driving the first gear or the third gear is mounted on the gear mounting plate. (5) In the invention of claim 5, in the above (1), a pair of left and right gear mounting plates are provided, and the second gear is held in mesh with the pair of first gears on the left and right, corresponding to the pair of gear mounting plates. A pin and a micrometer are mounted on the device housing, one pair each on the left and right sides.

[0007]

FIG. 1 shows an embodiment of the present invention, and FIG.
The same reference numerals are given to portions corresponding to. The first gear 1 is rotatably mounted on the gear mounting plate 4, and the second gear 2 is arranged so as to mesh with the first gear 1. The gear mounting plate 4 is fixed to the housing of the gear device after the backlash adjustment with screws 5.

In the example shown in FIG. 1, the first gear 1 is a drive gear and the second gear is a driven gear, as in the prior art, and a motor 3 for rotating and driving the first gear 1 is mounted on a gear mounting plate 4. In the present invention, the pin 6 is connected to the first gear 1 and the second gear 2.
In the radial direction of the first gear, which is perpendicular to a straight line connecting the centers of the first gear, the first gear is projected from the apparatus housing. Also, the gear mounting plate 4
An engaging hole 7 for engaging with the pin 6 is formed in the first gear 1, and a lever 8 is mounted on the opposite side of the center of the first gear 1 from the engaging hole 7.

On the other hand, a micrometer 9 is attached to the apparatus housing so as to be able to move forward and backward. By pressing the lever 8 with the micrometer 9, the gear mounting plate 4 is slightly rotated in the circumferential direction around the pin 6 to adjust the gear backlash. For example, by fixing the gear mounting plate 4 to the housing with the screw 5 at a position where the reading of the micrometer 9 becomes a predetermined value, it is possible to suppress the variation in the backlash of each gear device.

FIGS. 2 and 3 show a gear for rotating a pitch axis (to which the camera is fixed) at an arbitrary angle in a range of ± 30 ° in a camera stabilizer in order to change the direction of the camera up and down. This is an example in which the present invention is applied to a device. In this case, a third gear 13 rotationally driven by the motor 3 is mounted on the gear mounting plate 4, and the third gear meshes with the first gear and is rotationally driven.

In this example, a pair of left and right gear mounting plates 4
Is mounted on the outer surface of the housing (base plate) 10, and the second gear 2 is engaged with the pair of first gears 1 on the left and right sides to be sandwiched. The pins 6 and the micrometer 9 are mounted on the device housing (base plate) 10 in pairs corresponding to the pair of gear mounting plates 4, respectively. The first gear 1 and the third gear 13 protrude toward the inner surface of the housing 10 through the hole 10a or 10b of the housing 10. The first gear 1 is covered with a gear cover 11 attached to the gear attachment plate 4,
The lever 8 is attached to the gear cover 11. In FIGS. 2 and 3A, the right gear cover is removed so that the inside can be seen. A cylindrical shaft 2a is integrally protruded from the inner surface of the second gear 2, and a pitch axis (not shown) of a camera stabilizer is connected to the cylindrical shaft 2a.

In the above description, the first gear 1 and the second gear 2 attached to the gear attachment plate are the drive gear and the driven gear, but the first gear 1 is the driven gear and the second gear is the drive gear. You may. However, in that case, the motor 3 is removed from the gear mounting plate 4, and a motor for driving the second gear is mounted on the device housing instead. In the above description, the motor 3 that drives the first gear 1 to rotate is used.
Has been described as being mounted on the gear mounting plate 4,
The motor 3 can be attached to the device housing to drive the first gear via, for example, a belt or a chain.

[0013]

According to the present invention, the gear mounting plate 4 is rotatably mounted around the pins of the apparatus housing, and the rotation angle is adjusted by the micrometer 9 so that the center of each of the driving gear and the driven gear can be adjusted. The distance between them can be set to a constant value. Therefore, variations in gear backlash are suppressed, and variations in the performance of the gear device can be suppressed.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing another embodiment of the present invention.

3A and 3B are a front view and a rear view of the gear device of FIG. 2, respectively.

FIG. 4 is a principle front view of a conventional gear device.

Claims (5)

[Claims] 1. A gear device comprising: a first gear rotatably mounted on a gear mounting plate; and a second gear meshing with the first gear, wherein the gear mounting plate is mounted on a housing. 1, a pin arranged in the radial direction of the first gear perpendicular to a straight line connecting the centers of the second gear and protruding from the housing, and an engagement formed on the gear mounting plate and engaging with the pin A hole, a lever attached to the gear attachment plate on the opposite side of the engagement hole with respect to the center of the first gear; A gear device comprising: a micrometer that adjusts gear backlash by slightly rotating a mounting plate around the pin in the circumferential direction. 2. The gear device according to claim 1, wherein the first gear is a drive gear, and the second gear is a driven gear. 3. The gear device according to claim 2, wherein a third gear rotationally driven by a motor is mounted on the gear mounting plate, and the third gear meshes with the first gear to rotate. . 4. The gear device according to claim 2, wherein a motor for rotating and driving the first gear or the third gear is mounted on the gear mounting plate. 5. The device according to claim 1, wherein a pair of left and right gear mounting plates are provided, and the second gear is a pair of left and right first gears.
A gear device, wherein the pin and the micrometer are respectively attached to the housing by a pair of left and right corresponding to the pair of gear attachment plates.