JPH0750132Y2 - Sliding surface lubricating oil recovery device in vertical ram cylinder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a machine tool having a vertical ram cylinder structure in which a ram projects from below a saddle, such as a gate type machining center. The present invention relates to a collecting device for collecting.

[0002]

2. Description of the Related Art In a vertical ram cylinder in which a ram 3 is projected and retracted from below a saddle 2 of a portal machining center, a spindle head 1 is caused by a lubricating oil drooping down a sliding surface of the ram 3.
Also, there is a possibility that a table (not shown) and a work placed on the table may be contaminated. Therefore, conventionally, as shown in FIG. 3, a wiper 5 is provided on the inside of the saddle lower cover 4 so as to be scraped off, and an upper portion of the lubricating oil that cannot be scraped off and drops down is opened. It is generally practiced to collect the oil in the oil receiving trough 6 having an L-shaped cross section.

[0003]

Since the upper part of the oil receiving trough is largely open, not only the lubricating oil that drips down but also chips and dust generated in the processing work enter. Need to be removed. Especially in machine tools, it is difficult to remove foreign substances and the frequency of cleaning naturally increases because it is desirable to minimize the volume of the oil receiving trough 6 so as not to interfere with the work during machining. Become.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention is designed to prevent the mixing of chips and dust and to collect only the dripping lubricating oil. It is made by arranging a gutter around it and installing a dustproof cover on the oil receiving gutter.
The roof of the dustproof cover is slanted downward to the outside, and there is a sliding surface lubricating oil recovery device in which a minute gap communicating with the oil trough is secured at least between the dustproof cover and the ram.

[0005]

[Operation] Due to the dust cover, cutting chips and dust do not enter the oil trough, and the lubricating oil that drips down into the oil trough through a minute gap provided between the dust cover and the ram. Be recovered.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lubricating oil recovery device according to the present invention will be described below with reference to the drawings. FIG. 1 shows a supporting portion of a spindle head 1 in a portal type machining center.
A ram 3 protruding and retracting from the lower surface thereof is slidably accommodated, and a spindle head 1 is fixed to the lower end of the ram 3. A wiper 5 is provided inside the saddle lower cover 4 as in the conventional case, so that the lubricating oil dripping on the peripheral surface of the ram 3 is scraped off. An oil receiving trough 6 is provided around the ram 3 slightly above the spindle head 1. An oil level gauge 7 is provided on the side surface of the oil receiving trough 6 and an oil drain plug 8 is provided on the bottom surface. ing. As shown in FIG. 2, a dustproof cover 10 is attached to the oil gutter 6 so as to keep a minute gap 9 between the oil gutter 6 and the peripheral surface of the ram 3 and to close the upper opening of the oil gutter 6. ing. Protrusions 10a are provided at appropriate positions on the inner circumference of the dustproof cover 10, and the dustproof cover 10 is attached by screwing bolts 10b into locking holes formed in the ram 3 corresponding to the protrusions 10a. , Dust-proof cover 1 without protrusion 10a
A minute gap 9 is maintained between the inner periphery of 0 and the peripheral surface of the ram 3. In addition, the mounting position of the dustproof cover 10 is the ram 3,
Either of the oil trough 6 may be used, and in addition to directly mounting the dustproof cover 10 as in the above-described embodiment, a mounting member is erected on the bottom surface of the oil trough 6 and the mounting member is provided on the bottom surface of the dustproof cover 10. Attach the dustproof cover 10 by bolting the upper end of the
The attachment means of is not limited to this embodiment. The roof of the dustproof cover 10 is inclined downward to the outside, and the outer edge is a tapered surface that is retracted inward, so that a gap 11 is secured between the outer edges of the oil trough 6 and the dustproof cover 10. ing. The gap 9 and the gap 11 between the oil receiving trough 6 and the peripheral surface of the ram 3 are appropriately set according to the viscosity and surface tension of the lubricating oil and the size of chips and the like. The present invention is constructed as described above, and its operation is as follows. Lubricating oil that moistens the sliding surface is forcibly supplied in the saddle 2, and is wiped off by the wiper 5 provided inside the saddle lower cover 4 every time the ram 3 projects downward. A small amount of lubricating oil that cannot be captured by the wiper 5 drips along the outer peripheral surface of the ram 3 and receives oil from a minute gap 9 formed between the peripheral surface of the ram 3 and the dust cover 10. It flows into the gutter 6. Since the upper opening of the oil receiving trough 6 is covered with the dustproof cover 10, cutting chips and dust are not blocked by the dustproof cover 10 and enter the oil receiving trough 6 and the Only lubricating oil is collected. Then, the chips and dust that have been prevented from entering the oil trough 6 fall along the sloping roof, and the dustproof cover 1
It does not deposit on 0. In the recovery apparatus of this embodiment, the gap 9 between the peripheral surface of the ram 3 and the dust cover 10 is set extremely narrow, while the gap 11 is secured between the outer edges of the oil trough 6 and the dust cover 10. The lubricating oil that cannot pass through the gap 9 and flows out to the roof surface side of the dust cover 10 wraps downward from the roof along the tapered surface, passes through the gap 11 and is collected in the oil receiving trough 6. It is like this. Then, the collected lubricating oil may be appropriately discharged by checking the accumulated amount with the oil level gauge 10 and opening the oil drain plug 11. It should be noted that it is desirable to provide oil cutouts on the inner and outer peripheral edges of the bottom surface of the dustproof cover 10. Also, the gap 9
In the opening of the convex portion 10a is formed in a comb shape to prevent thin chips from falling, the convex portion 10a is provided on the entire inner circumference of the dustproof cover 10, and the upper portion of the convex portion 10a is inclined, By guiding the recovered lubricating oil and dropping it onto the oil receiving trough 6 from one notch provided on the convex portion 10a, the oil receiving trough 6 is provided not on the entire circumference of the ram 3 but on a part of the ram 3. Oil receiving gutter 6
It is also possible to downsize and simplify the replacement work.

[0007]

[Effect of the Invention] According to the present invention, solids such as chips and dust other than lubricating oil are not mixed in the oil trough, so the collected cutting oil has high purity and accumulates in the oil trough. The volume of recovered oil is larger than before, and the number of cleaning operations inside the gutter can be greatly reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a sliding surface lubricating oil recovery device according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 on a bolt for attaching a dust cover of the recovery device.

FIG. 3 is an explanatory diagram showing a conventional sliding surface lubricating oil recovery device.

[Explanation of symbols]

1 ・ ・ Spindle head 2 ・ ・ Saddle 3 ・ ・ Ram 4 ・ ・ Saddle lower cover 5 ・ ・ Wiper 6 ・ ・ Oil gutter 7 ・ ・ Oil level gauge 8 ・ ・ Oil drain plug 9 , 11 ・ ・ Gap, 10 ・ ・ Dustproof cover, 10a ・ ・ Convex portion, 10b ・ ・ Bolt

Claims (1)

[Scope of utility model registration request] 1. A vertical ram cylinder in which a ram appears and disappears from the lower side of a saddle. An oil gutter is provided around the lower part of the ram, and a dust cover is provided on the oil gutter, and the roof of the dust cover is outside. Sliding surface lubricating oil recovery device that inclines downward and secures a minute gap that communicates with the oil receiving gutter at least between the dustproof cover and the ram.