JPH0635237Y2 - Oil bath lubricator for drive transmission - Google Patents

Description

Description: TECHNICAL FIELD The present invention includes a housing including an oil storage box for storing lubricating oil and a cover for covering the oil storage box, the drive transmission apparatus being housed in the housing, and the drive transmission apparatus. Relates to an oil bath lubrication device of a drive transmission part in which at least a part of the oil bath goes into the lubricating oil in the oil reservoir.

PRIOR ART Oil bath lubricators of the type described above are well known and are provided in the drive connection of various machines. As a method for sealing lubricating oil in this type of device, an oil seal, a seal ring, or the like is generally used in the shaft portion, and an O-ring or the like is used in a joint or the like of the housing. FIG. 5 shows an example of the use of an oil seal on the shaft, where the shaft 101 is the housing 1
It is supported by 02 via a bearing 103 and is sealed by an oil seal 104. Also, in FIG. 6, the joint of the housing is O
An example of sealing with a ring is shown, and an O-ring 203 is press-fitted in a groove provided in the housings 201 and 202 to seal the seam.

Although these sealing methods can obtain fairly good sealing performance, they are poor in assembling performance and increase in assembly cost. Moreover,
If the assemblability is poor, the workability during maintenance such as lubricating oil replacement and seal material replacement will be poor. Further, the above-mentioned sealing method has a problem that the cost of parts such as all-seal is also high.

Purpose The present invention solves the above-mentioned conventional problems, and at low cost,
It is an object of the present invention to provide an oil bath lubrication device that can be easily assembled and maintained.

Configuration A drive transmission device having the above-described object, a housing including an oil storage box for storing lubricating oil and a cover for covering the oil storage box, and a first drive transmission member and a second drive transmission member housed in the housing. The second drive transmission member is oil bathed in the lubricating oil in the oil reservoir on the lower side, and is drive-coupled to the first drive transmission member above the oil bath position. In the oil bath lubrication device of the section, the first drive transmission member and the second drive transmission member are arranged so as to substantially cover the first drive transmission member and the second drive transmission member with respect to the direction in which the lubricating oil is scattered by the drive transmission of the second drive transmission member. The cover is provided with a shield plate, a relief portion is formed on the lower end side of the shield plate for avoiding contact with the shaft of the second drive transmission member, and the lowermost end of the shield plate is provided with the oil storage box and the cover. The seam and extends below the axis of the second drive transmission member It was achieved by doing.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an outline of a color copying machine to which the present invention can be applied to a driving unit. The copying machine includes a scanner unit 1 for reading a document, an image processing unit 2 for electrically processing an image signal output as a digital signal from the scanner unit 1, and image recording information of each color from the image processing unit 2. And a printer section 3 for forming an image on a copy sheet based on the above. The scanner unit 1 has a lamp 5 for scanning and illuminating an original on the original table 4, for example, a fluorescent lamp. The reflected light from the document when illuminated by the fluorescent lamp 5 is reflected by the mirrors 6, 7, 8 and enters the imaging lens 9. The image light is imaged on the dichroic prism 10 by the imaging lens 9, and is split into light of three kinds of wavelengths, for example, red R, green G, and blue B, and a light receiver 11, for example, CCD 11R for red for each wavelength light. Is incident on the green CCD 11G and the blue CCD 11B. Each of the CCDs 11R, 11G, and 11B exchanges the incident light with a digital signal and outputs the digital signal, and the output is subjected to necessary processing in the image processing unit 2 and recorded color information of each color, for example, black (hereinafter abbreviated as Bk). , Yellow (abbreviated as Y), magenta (abbreviated as M), and cyan (abbreviated as C) are converted into signals for recording formation.

FIG. 1 shows an example of forming four colors of Bk, C, M and Y.
It is also possible to form a color image with only three colors. In that case, the number of recording devices can be reduced by one from the example of FIG.

The signal from the image processing unit 2 is input to the printer unit 3,
It is sent to the laser light emitting devices 12Bk, 12C, 12M and 12Y of the respective colors.

In the example of the figure, the printer section has four sets of recording devices 13Bk, 13C, 1
3M and 13Y are arranged side by side. Since each recording device 13 is composed of the same constituent member, only the recording device for C will be described and the other colors will be omitted in order to simplify the description. For each color, the same parts are designated by the same reference numerals, and in order to distinguish the configuration of each color, the reference numerals are attached to indicate each color.

The recording device 13C is a photoconductor 14C in addition to the laser beam emitting device 12C.
For example, it has a photosensitive drum.

The photoreceptor 14C has a charging charger 15C and a laser light emitting device.
12C exposure device, developing device 16C, transfer charger 17C
Etc. are attached in the same manner as a known copying machine.

Photoconductor 14C uniformly charged by charging charger 15C
The laser light emitting device 12C forms a latent image of a Giant light image, and the developing device 16C develops the latent image to form a visible image.
The copy paper supplied from the paper supply unit 19, for example, one of the two paper supply cassettes, by the paper supply roller 18 is transferred to the transfer belt 21 at the same timing when the leading ends are aligned by the registration rollers 20.
Sent to. The copy paper conveyed by the transfer belt 21 is
The images are sequentially sent to the photoconductors 14Bk, 14C, 14M, and 14Y on which the developed images are formed, and the developed images are transferred under the action of the transfer charger 17. The transferred copy paper is fixed by the fixing roller 22 and discharged by the paper discharge roller 23.

The copy paper is electrostatically attracted to the transfer belt 21,
It can be accurately conveyed at the speed of the transfer belt.

FIG. 2 is a plan sectional view showing the outline of the drive unit of the photoconductor 14.

The photoconductor 14 rotates integrally with the photoconductor support shaft via a flange 27 fixed to the photoconductor support shaft 24. Photoconductor support shaft
The support 24 is rotatably supported by a supporter 26 attached to the main body 25, and a worm wheel 28 as a second drive transmission member is fixed. Further, a worm shaft bracket 33 is attached to the supporter 26, and the worm wheel 30 of the worm shaft 30 supported by the shaft support portion 34 is formed as a first drive transmission member at a position corresponding to the worm wheel 28.
29 is installed. A timing belt drive unit 32 is provided at one end of the foam shaft 30, and a photoconductor is rotated by a motor 31. Further, an oil bath lubrication device 35 for sealing lubricating oil is attached to the drive transmission device configured as each worm drive device. The photosensitive member support shaft 24 is supported by a supporter 26, and a collar 42 holds backlash in the thrust direction.

The oil bath lubrication device 35 according to the present invention, as shown in FIG.
It has an oil storage box (36) containing a lubricating oil (40) and a housing (38) composed of a cover for covering the oil storage box (36).

The housing 38 accommodates the worm wheel 28 fixed to the photoconductor support shaft 24 and the worm 29 fixed to the worm shaft 30, and the lower portion of the worm wheel 28 is immersed in the lubricating oil 40. A step portion 36a is formed in the oil sump box 36, and the oil level of the lubricating oil 40 is adjusted to the step portion 36 so that the stored amount can be a standard value.

In the oil bath lubrication device 35 thus configured, the lubricating oil 40 is sent to the meshing portion as the worm wheel 28 rotates during driving. At this time, since the rotation speed of the worm 29 is high, if the rotation direction of the worm is the counterclockwise direction in FIG. 3, the lubricating oil 40 will be scattered in the direction indicated by the arrow.

Therefore, in the present invention, two shield plates 39 and 39A are provided facing the worm 29 in the direction in which the lubricating oil 40 is scattered.
The upper ends of the shielding plates 39 and 39A are attached to the cover 37 as clearly shown in FIGS. 3 and 4, and in this case, the shielding plates
39 and 39A are fixed to or integrally formed with the cover 37. In addition, the lower ends of the shielding plates 39, 39A extend downward and the lubricating oil 40
Has reached a position where it can sufficiently shield the splashes of. In the case of the present embodiment, the shield plate 39, 39A is formed with an escape portion so as not to touch the photoconductor support shaft 24, but the lowermost end reaches a position slightly lower than the lower end of the collar 42. .

The oil bath lubrication device 35 thus configured is provided with the shielding plates 39 and 39A, so that the lubricating oil 40 is scattered by the rotation of the worm 29 to adhere the lubricating oil 40 to the shielding plates 39 and 39A, and to the shielding plates 39 and 39A. It falls along and returns to the lubricating oil sump. Therefore, the lubricating oil 40 flowing to the supporter 26 along the photoconductor support shaft 24 is almost eliminated, and therefore, it is not necessary to use a sealing means such as an oil seal on the shaft portion. In addition, the shielding plates 39 and 39A are the housing 38 and the cover 37.
Since it extends below the joint with
Since the lubricating oil 40 is also blocked by the shielding plates 39, 39A at the joint between the cover 38 and the cover 37, no sealing means such as an O-ring is required.

Thus, the oil bath lubrication device 35 can prevent leakage of the lubricating oil 40 due to splashes without using any special sealing means. Therefore, as shown in FIG. 4, the oil bath lubrication device 35 is constructed so that the cover 37 can be screwed to the oil sump box 36, and the oil sump box 36 can be screwed to the worm shaft bracket 33. You can A rubber seal 41 may be provided on the contact surfaces of the worm shaft bracket 33, the oil reservoir 36 and the cover 37 as shown in FIG. This rubber seal
41 can be easily inserted by simply inserting it when screwing.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made. For example, although the shield plate is provided in the worm scattering direction, it may be provided on both sides in the axial direction of the worm if the lubricating oil scattering direction is dispersed.

Further, the lowermost end of the shielding plate may reach the oil reservoir of the lubrication box, and its length is arbitrary depending on the scattering.

Although the present invention has been described with reference to the embodiment of the drive section of the copying machine, it can be applied to oil bath lubrication of all drive sections, and the drive transmission section is not limited to the worm drive apparatus, and various drive transmission apparatuses for oil baths can be used. Is applicable to.

Effects The oil bath lubrication device according to the present invention is configured as described above, has a very simple structure, can prevent oil from leaking due to scattering, and does not require a special sealing means. Therefore, it is low cost,
Assembly and maintenance are also greatly improved.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a color copying machine to which the present invention is applied, and FIG. 2 is a plan sectional view showing an outline of driving of a photoconductor.
FIG. 3 is an enlarged sectional view of the present invention, FIG. 4 is an exploded perspective view of a housing, and FIGS. 5 and 6 are sectional views showing an oil seal and an O-ring used in a conventional oil bath lubricating device. . 28 …… Worm wheel 29 …… Worm 35 …… Oil bath lubricator 36 …… Oil sump box 37 …… Cover 39, 39A …… Shield plate

Claims (1)

[Scope of utility model registration request] 1. A drive transmission device including a housing including an oil storage box for storing lubricating oil and a cover for covering the oil storage box, and a first drive transmission member and a second drive transmission member housed in the housing. The second drive transmission member is oil bathed in the lubricating oil in the oil reservoir on the lower side, and is drive-coupled to the first drive transmission member above the oil bath position. A part of the oil bath lubrication device, the first drive transmission member and the second drive transmission member are arranged so as to substantially cover the first drive transmission member and the second drive transmission member in the direction in which the lubricating oil is scattered by the drive transmission. The cover is provided with a shield plate, a relief portion is formed on the lower end side of the shield plate for avoiding contact with the shaft of the second drive transmission member, and the lowermost end of the shield plate is provided with the oil storage box and the cover. Of the second drive transmission member and the shaft of the second drive transmission member. The oil bath lubrication device described above.