JPH06264938A - Driving transmission device - Google Patents

Abstract

PURPOSE:To simplify attaching/detaching by mounting a sleeve which is fitted onto the unevenness of both casings on the driven side and the driving side, dividing the driving side easing in a peripheral direction, and forming the tooth shape of the sleeve so that the driving side casing can be detached from the sleeve vertically in an axial core radius direction. CONSTITUTION:A driven side easing 14 is fixed at a rotating shaft 12 end part, and unevenness which is fitted in a sleeve 25 is formed at its inner peripheral surface. A driven side casing 18 which is fixed at a rotating shaft 17 is divided into two of upper and lower parts, and tightened with bolts or the like. Unevenness which is fitted in the sleeve 25 and enables the divided driving side easing 18 to be detached from the sleeve 25 in a vertical direction is formed at the driving side casing 18 inner peripheral surface. A through hole 19 which can be fitted onto rotating shafts 12, 17 are drilled in the sleeve 25, and a lot of unevenness 26 are formed on the outer peripheral part. The ridge lines 26a, 26b, 26c, 26d of the unevenness 26 are formed in parallel to each other, so the driving side easing 18 can be detached from the sleeve 25 in a vertical and horizontal directions. It is thus possible to attach/detach a motor 15 or a drum 10 on the driving side without moving it in an axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive transmission device,
Particularly, the present invention relates to a drive transmission device that requires high precision at high speed rotation.

[0002]

2. Description of the Related Art Conventionally, a drive system for a photosensitive drum of a copying machine which requires high rotational accuracy, as shown in FIG. 4, has both sides of a rotary shaft 2 of a drum 1 (highly accurate) bearings 3 on both sides. Supported by a motor 4 having a uniform rotational speed and having a high-accuracy rotation ratio and smooth output rotation with little vibration in the rotation direction (for example, a planetary roller speed reducer) to rotate the drum. There is a system in which the shaft is directly connected by a coupling 6 (which is composed of a pair of casings 6a and 6b and a sleeve 6c as shown in FIG. 5). Further, as shown in FIG. 6, both sides of the rotary shaft 2 of the drum 1 are supported by (highly precise) bearings 3, and a transmission gear 8 is attached to the rotary shaft 2. There is a method in which a gear 9 that meshes with the gear 8 is attached and configured.

[0003]

The above-mentioned conventional example has the following problems. That is, in the system of FIG. 4 in which the rotary shaft 2 is directly connected via the coupling 6, when the drum 1 is removed or set, the drum 1 is moved in the axial direction, and therefore the longitudinal direction of the drive system is lengthened. There is a need. However, in particular, OA devices and the like have recently been integrated at high density, and some devices cannot be moved. In such a case, so-called disassembly and removal or mounting and wearing are required. Also, FIG.
In the second example of the above, the drum 1 can be easily removed when placed in a mechanism for transmitting via a gear, but since it is a transmission mechanism by the meshing of the gears 8 and 9, it is highly accurate. There remains a problem in terms of accuracy for high-speed rotation. Therefore, the present invention provides a drive transmission device that solves the above-mentioned problems, does not require axial movement or disassembly, and does not cause deterioration in accuracy due to meshing of gears.

[0004]

SUMMARY OF THE INVENTION The present invention to achieve the above-mentioned object is to provide a driven-side casing which is attached to a rotary shaft of a drum and has an inner peripheral surface having irregularities, and an inner peripheral surface which is attached to a drive shaft to have irregularities. A drive-side casing that is formed, and a sleeve that fits into the irregularities of the driven-side casing and the drive casing, divides the drive-side casing in the circumferential direction, and separates the drive-side casing from the sleeve to the axial center. The tooth profile of the sleeve is formed so as to be vertically removable in the radial direction.

[0005]

The driving-side casing is formed so as to be divided in the circumferential direction, and the concavities and convexities are formed in parallel with each other so that it can be removed vertically from the sleeve fitted to the inner periphery in the radial direction of the shaft core. ing. Therefore, by removing the casing on the driving side from the sleeve, the casing on the driven side can be removed without moving the driven side in the axial direction without moving the sleeve.

[0006]

Embodiments of the present invention will be described with reference to FIGS. FIG. 1 shows a front cross-section on the driving side, in which both sides of a rotary shaft 12 of a drum 10 are supported by (highly precise) bearings 13, and the bearings 13 are detachably attached to a case 11. A cylindrical driven-side casing 14 is fixed to the end of the rotary shaft 12, and an inner peripheral surface of the rotary shaft 12 is provided with irregularities for fitting with a sleeve 25 described later.
On the other hand, a motor 15 and a speed reducer 16 are directly connected to the drive side, and a drive side casing 18 is fixed to the rotary shaft 17. The drive side casing 18 is vertically symmetrically divided into two parts as shown in FIG. 2, and is fastened with bolts or the like by the flange 20 at the end. Further, a sleeve 25 described later is fitted on the inner peripheral surface of the drive side casing 18,
The divided drive side casing 18 is the sleeve 2
Depressions that can be removed from the upper and lower sides are formed from 5. FIG. 3 is a perspective view of a sleeve 25 that is fitted to the inner circumferences of the driving-side casing 18 and the driven-side casing 14 to transmit a rotational force, and a through hole 19 into which the rotating shafts 12 and 17 can be fitted. Is formed, and a large number of irregularities 26 are formed on the outer peripheral portion. The irregularities 26 show an example of a shape in which the drive side casing 18 can be removed from the sleeve 25. As is apparent from FIG. 3, the ridge lines 26a, 26b and 26c, 26d of the uneven portion are formed in parallel with each other, and the two-divided drive side casing 18 can be easily moved in the opposite directions such as up, down, left and right. It can be removed from.

As described above, in the structure of the driving side casing 18 which is vertically symmetrically divided into two, by separating the driving side casing 18 from the sleeve 25, the sleeve 25 and the receiving side are attached to the driven side rotating shaft. Since the drive-side casing 14 is detached from the drive rotary shaft while being attached, the drum 10 can be removed and installed. That is, unlike the prior art, the motor 15 on the drive side or the drum 10 can be attached / detached without moving in the axial direction. As a result, accurate drive transmission can be performed even at high speed rotation, and the device configuration can be made smaller than conventional ones. The shape of the unevenness of the sleeve 25 need only be such that only the driving side casing 18 can be removed, and therefore the shape of the unevenness on the driven side does not have to be the same as that on the driving side. Further, it goes without saying that the uneven cross-sectional shape of the sleeve 25, that is, the uneven shape formed on the inner circumference of the drive side casing 18 is not limited to the above-mentioned shape, and further, if the number of divisions of the drive side casing 18 is 2 or more. It goes without saying that it is acceptable. That is,
The number of divisions in the circumferential direction of the drive casing 18 is determined so that the sleeve 25 can be taken out from the driven-side rotating shaft 12 with the sleeve 25 attached thereto. It may be formed detachably.

[0008]

As described above, in the drive transmission device of the present invention, the drive side casing is divided and is detachably formed from the sleeve. Therefore, the drum can be simply attached and detached without moving the casing on the driving side without moving the casing in the axial direction, so that accurate drive transmission and a small device configuration can be realized.

[Brief description of drawings]

FIG. 1 is a diagram showing a front cross section of a drum driving side.

FIG. 2 is a diagram showing a perspective view of a divided drive-side casing.

FIG. 3 is a diagram showing a perspective view of a sleeve.

FIG. 4 is a diagram showing a drive transmission device used for a conventional photosensitive drum.

5 is a diagram showing the coupling shown in FIG. 4. FIG.

FIG. 6 is a view showing another conventional drive transmission device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 drum 12,17 rotating shaft 13 bearing 14 driven side casing 15 motor 16 speed reducer 18 driving side casing (two cracks) 19 through hole 20 collar 25 sleeve 26a, 26b, 26c, 26d ridge line

Claims (1)

[Claims] 1. A driven-side casing mounted on a rotary shaft of a drum and having irregularities formed on its inner peripheral surface, a driving-side casing mounted on a drive shaft and having irregularities formed on its inner peripheral surface, and said driven-side casing. A sleeve that fits into the irregularities of the drive casing, divides the drive side casing in the circumferential direction, and forms the tooth profile of the sleeve so that the drive side casing can be vertically removed from the sleeve in the radial direction of the axial center. Drive transmission device.