JPH088398Y2 - Oil bath lubricator for drive transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to an oil bath case including an oil storage box for storing lubricating oil and an upper cover for covering the oil storage box, and an oil bath case housed in the oil bath case. And a drive transmission device that transmits drive by meshing with a drive transmission member and a second drive transmission member that is fixed to a rotary shaft that is supported by a side plate through a bearing, and the second drive transmission member is a lower side. And an oil bath lubrication device of a drive transmission part that is oil bathed in the lubricating oil in the oil reservoir and is drivingly connected to the first drive transmission member above the oil bath position.

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.

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 in maintenance such as replacement of the lubricating oil and replacement of the sealing material becomes poor. Further, the above-mentioned sealing method has a problem that the cost of parts such as all-seal is also high.

In order to solve this problem, Japanese Utility Model Laid-Open No. 1-125444 discloses a shield plate which is attached to a cover and extends downward in the oil sump box. , An oil bath lubrication device arranged to face the drive transmission device.

However, in this oil bath lubrication device, the cover is only fixed to the oil sump with screws and the cover is not hermetically sealed to the side plate. For this reason, there is a problem that oil leaks from between the cover and the side plate.

DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION The present invention aims to provide an oil bath lubrication device that solves the above-mentioned conventional problems and can prevent oil leakage without impairing workability such as assembling and maintenance. .

Means for Solving the Problems In order to achieve the above object, the present invention provides an oil bath lubrication device for a drive transmission part, wherein the upper cover is formed in a shape covering substantially the entire first drive transmission member from above. The upper surface of the upper cover is formed as an inclined surface that is downstream with respect to the lubricating oil scattering direction due to the rotation of the first drive transmission member, and that the side opposite to the side where the bearing of the second drive transmission member is arranged is downward. It is characterized by

Action According to the above configuration, the direction in which the lubricating oil that adheres to the upper cover due to scattering can be regulated, so that the lubricating oil can flow to the opposite side of the bearing that is less affected by the lubricating oil leak.

Embodiment Hereinafter, an embodiment of the present invention will be described 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 from the scanner unit 1 as a digital signal,
The printer unit 3 forms an image on copy paper based on the image recording information of each color from the image processing unit 2. 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 converts incident light into a digital signal and outputs the digital signal. The output is subjected to necessary processing in the image processing unit 2, and recording 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, but 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 and the laser light emitting devices 12Bk, 12C, 12M and 12Y of the respective colors are input.
Sent to

In the printer section, four sets of recording devices 13Bk, 13
C, 13M 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. Note that, for each color, the same portions are denoted 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 includes a photoconductor 14 in addition to the laser light emitting device 12C.
C, eg having a photoconductor drum.

The photoconductor 14C includes a charging charger 15C, an exposure device using a laser light emitting device 12C, a developing device 16C, and a transfer charger 17.
C and the like are attached in the same manner as a known copying machine.

Photoconductor 14C uniformly charged by charging charger 15C
Forms a latent image of a cyan light image by the laser light emitting device 12C and develops it by the developing device 16C 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.

By being electrostatically attracted to the transfer belt 21, the copy paper 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 24 via a flange 27 fixed to the photoconductor support shaft 24 as a rotation shaft. The photoconductor support shaft 24 is rotatably supported by a supporter 26 attached to the main body side plate 25 via a bearing 39, and a worm wheel 28 as a second drive transmission member is fixed. A worm shaft bracket 33 as a side plate is attached to the supporter 26, and the shaft support 34
A worm 29 as a first drive transmission member is attached to a corresponding position of the worm wheel 28 of the worm shaft 30 supported by. A timing belt drive unit 32 is provided at one end of the worm shaft 30, and a photoconductor is rotated by a motor 31. Further, the drive transmission device configured as each worm drive device includes an oil bath lubrication device 35 for sealing the lubricating oil.
Is attached. The photosensitive member support shaft 24 is supported by a supporter 26, and a collar 42 holds backlash in the thrust direction.

As shown in FIG. 3, the oil bath lubrication apparatus 35 according to the present invention has an oil bath case 38 having an oil storage box portion 36 storing a lubricating oil 40 and a cover for covering the oil storage box portion 36. There is.

In the oil bath case 38, the worm wheel 28 fixed to the above-mentioned photoreceptor support shaft 24 and the worm 29 fixed to the worm shaft 30 are accommodated, and the lower portion of the worm wheel 28 is immersed in the lubricating oil 40. . The oil reservoir box 36 has a step 36
a is formed, and the level of the lubricating oil 40 is adjusted to the stepped portion 36a so that the stored amount of the lubricating oil 40 serves as a guide.

By the way, in the conventional oil bath lubrication device, the lubricating oil 40 leaks from between the worm shaft bracket 33 and the oil bath case 38 due to the splash of the lubricating oil 40.

Therefore, in the present invention, as shown in FIGS. 3 and 4, the oil bath case 38 includes the oil sump box 36, the oil pan 43 and the side cover.
44 and the oil reservoir box portion 36 is covered with an upper cover 37. That is, the oil bath case 38 is divided into three members, the oil pan 43, the side cover 44, and the upper cover 37. In this case, in the oil pan 43 and the side cover 44, the oil pan 43 surrounds the lower half of the bearing 39, and the side cover 44 covers the bearing 39.
Is formed so as to surround the upper half.

The oil pan 43 has an upper portion on which the insertion portion 4 to be inserted into a claw 44c described later on the surface facing the worm shaft bracket 33.
A mounting portion 43b for screwing the worm shaft bracket 33 to the worm shaft bracket 33 is provided in the lower portion of the 3a. In addition, the side cover 44 has an abutting part on the surface facing the worm shaft bracket 33.
On the surface of the shaft 44a facing the worm wheel 28, there is formed a facing portion 44b surrounding the upper region of the shaft 30 and having both ends extending downward from the shaft 30. In addition, the side cover 44 has an oil pan.
Claw 44c that holds 43 and worm shaft bracket 3 on both sides
3 is provided with a mounting portion 44d for screwing.
Further, the upper cover 37 is formed with an inclined surface 37a on the upper surface thereof, which is inclined downward in the direction opposite to the bearing 39, and regulates the flowing direction of the lubricating oil 40 scattered on the inner surface of the upper cover 37. The inclination of the upper surface of the upper cover is such that the downstream side thereof is downward with respect to the direction in which the lubricating oil 40 is scattered by the rotation of the worm 29. Therefore, the scattered lubricating oil 40 does not oppose the inclined surface 37a, but along the inclination. Flowing. The top cover 37 has a fifth
As shown in the figure, shield plates 37b are provided on both sides of the worm 29 in the axial direction of the worm shaft 30 for shielding the scattered lubricating oil 40.

 Next, a procedure for assembling the oil bath case 38 will be described.

First, the side cover 44 is fixed to the worm shaft bracket 33 with a screw (not shown) at the mounting portion 44d. At this time, the abutting portion 44a of the side cover 44 abuts, and the side cover 44 and the worm shaft bracket 33 are hermetically sealed without a gap.

Next, insert the insertion part 43a of the oil pan 43 into the claw 4 of the side cover 44.
Insert between 4c and mounting part 44d. At this time, as shown in FIG. 6, the insertion portion 43a is slightly inclined to the worm shaft bracket 33 side with respect to the surface of the mounting portion 43b of the oil pan 43, and therefore, the insertion portion 43a is inserted. Allows the oil pan 43
The upper part of is pressed against the claw 44c of the side cover 44. And
By fixing the lower side of the oil pan 43 with a screw (not shown) at the mounting portion 43b, the oil pan 43 is fixed to the worm shaft bracket 33.

Next, when the upper cover 37 is attached to the oil bath box portion 36 including the oil pan 43 and the side cover 44, the upper cover 37 is pressed against the oil bath box portion 36 by the leaf spring 46 attached to the worm shaft bracket 33. In this case, in the state where the upper cover 37 is attached to the leaf spring 46, the bent portion 46a is formed so as to be positioned above the corner portion 37c, and the corner portion 3 of the upper cover 37 is formed.
When the 7c exceeds the bent portion 46a, the pressing force of the leaf spring 46 acts on the upper cover 37. With this, the upper cover 37 is attached to the oil bath box portion 36 by one-touch operation.

In the oil bath lubrication device 35 thus configured, the lubricating oil 40 can flow in the direction opposite to the bearing 39 due to the inclined surface 37a formed on the upper surface of the upper cover 37. Therefore, it is possible to prevent the lubricating oil 40 from leaking between the side cover 44 and the worm shaft bracket 33.

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 According to the above configuration, the oil bath lubrication device of the present invention can regulate the flowing direction of the lubricating oil adhering to the upper cover by scattering, and can flow the lubricating oil to the opposite side of the bearing which is less affected by the lubricating oil leak. Is. Moreover, since the inclination of the upper cover is such that the downstream side thereof is downward with respect to the direction in which the lubricating oil is scattered by the rotation of the worm, the scattered lubricating oil can flow without going against the inclined surface.

[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 an oil bath case, FIG. 5 is a side view thereof, and FIG. 6 is an enlarged sectional view of the oil bath lubricating device in a direction different from that of FIG. Is. 28… Worm wheel 29… Worm 35… Oil bath lubrication device 36… Oil reservoir box 37… Top cover 37a… Inclined surface 38… Oil bath case 39… Bearing 43… Oil pan 44… Side cover

Claims (1)

[Scope of utility model registration request] 1. A first drive transmission member housed in an oil bath case, which comprises an oil storage box for storing lubricating oil and an upper cover for covering the oil storage box, and which is housed in the oil bath case and rotates in a predetermined direction. And a drive transmission device that transmits a drive by meshing a second drive transmission member fixed to a rotating shaft supported by a side plate of the oil bath case via a bearing,
In the oil bath lubrication device of the drive transmitting portion, the drive transmitting member is bathed in the lubricating oil in the oil reservoir on the lower side, and is meshed with the first drive transmitting member above the oil bath position. A cover is formed in a shape that covers almost the entire first drive transmission member from above, and an upper surface of the upper cover is on a downstream side with respect to a lubricating oil scattering direction due to rotation of the first drive transmission member, and The oil bath lubrication device is characterized in that the second drive transmission member is formed on an inclined surface with the side opposite to the side where the bearing is arranged being downward.