US1350309A - Lubricating system for planers - Google Patents

Description

G. E. GREENLEAF.

LUBRICATING SYSTEM FOR PLANERS.

APPLICATION FILED MAR. 3, 1919.

Patented Aug; 24, 41920.

2 SHEETS-SHEET l. Q4

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G. E. GREENLEAF.

LUBRICATING SYSTEM FOR PLANERS.

APPLICATION FILED MAR-3,1919.

Qs im l /A mm Patented Aug. 24, 1920.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GEORGE E. GREENLEAF, 0F PLAINFIELD, NEW JERSEY, ASSIGNOR TO NILES-BEMENT- POND COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

LUBRICATING SYSTEM FOR PLANERS.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application led vMarch 3, 1919. Serial No. 280,488.

To all lwhom it may concern:

Be it known that I, GEORGE E. GREEN- LEAF, a citizen of the United States, residing at Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Lubricating Systems for Planers, of which the following is a specification.

The object of the invention is to provide a simple forced feed lubricating systemv removed as are also the arch, the cross rail,

the tool heads and associated parts.

Fig. 2 is a sectional view taken along the line 2 2 of Fig. 1. In this view the table is shown in place.

Fig. 3 is an enlarged horizontal sectional view showing the pump plunger, the view being taken along the line 3--3 of Fig.' 2.

Fig. 4 is a vertical sectional vlew taken along the line 4-4 of Fig. 3.

,Figa 5 is a plan view similar to Fig. 1 but showing an alternate construction.

Fig. 6 is a sectional view taken along the lin'e 6-6 of Fig. 5. In this view the table is shown in place.

Fig. 7 is an enlarged horizontal sectional view showing the pump plunger, the view being taken along the line 7-7 of Fig. 6.

Of the drawings, 1 represents a planer bedprovided with ways or bearing surfaces 2 and 3 along which the table 4 is adapted to reciprocate in the usual manner. At the sides of the bed 1 are housings 5, 5 which carry the cross rail and other parts, which are not shown as they constitute no part of the present invention.

For driving the table back and forth along the bed there is provided suitable gearing mounted on the bed below the table. For operating the gearing I have shown an electric motor 6 which is connected with a transverse horizontal shaft 7. n Mounted at the inner end of the shaft 7 is-a pinion 8 meshing with a gear 9 on a transverse shaft 10. Mounted on the shaft 10 is a pinion 11 meshing with a gear 12 on a transverse shaft 13.v Mounted on the yshaft 13 is a pinion 14 I meshing with a gear 15 on a transverse shaft 16. The gear 15 meshes with a rack 17 secured to the bottom of the table and extending longitudinally thereof. Suitable control mechanism is provided for rotatin the motor first in one direction and then 1n the other, and it will be seen that the motor, through the gearing which has been described, serves to drive the table alternately forward and backward.

The ways or bearing surfaces 2 and 3 o n which the table slides .must be properly lubricated, and it is to the mechanism for effecting this lubrication that my resent invention particularly relates. As illustrated, there is provided an oil reservoir 18 from which oil is drawn'by means of a suitable to distribute the oil from the said oil holes.

over the entirebearing surfaces. At the ends of the bearing surfaces are recesses 23, 23 and 24, 24" in which surplus oil is collected. From these recesses the oil drains back through pipesv 25, 25 to the reservoir 18.

The pump is shown in detail in Figs. 3v and 4. It comprises a bracket 26 suitably mounted as for instance on one of the housings 5. A part of the bracket 26 is shaped to provide a cylinder 27 in which a plunger 28 is mounted for reciprocation. At 29 the bracket is rovided with anarm which engages the ront end of the plunger for supporting and guiding it. A stuffing box 30 is provided for making a tight joint between the lunger and the cylinder.

ounted partly in the bracket 26 and partly in bearings on the bed is a transverse rotatable shaft 31. This shaft carries at its inner end a gear 32 'which meshes with one of the gears of the main drive gearing, in this case the pinion 11. It will be seen that the construction is such that the shaft 31 will be rotated whenever the planer is in operation, the shaft turning first in one disusv charge pipes or at the bearing surfaces. Ex-

the reservoir 18. A ball check valve 36 is provided at the end of the pipe. At 37v is a discharge outlet which communicates with thepipe 20. A ball check valve 38 is provided at the entrance to the pipe. The third opening is indicated at 39 and this communicates with a by-pass pipe 40 which leads to the reservoir 18. A ball check valve 41 is provided at the entrance to the pipe 40, this valve being normally held closed by a spring 42 so that it can open only when the pressure in the cylinder exceeds the predetermined amount.

It will be seen thatwhen the plunger is in operation the shaft'31 will rotate first in one direction and then in the other and that for each direction of rotation the shaft will reciprocate the plunger 28. As-the plunger moves toward the front the check valves v38 and 41 will remainclosed and oil will be sucked into the cylinder through the pipe 19,

the check valve 36 automatically opening.

valve 38 opens, permitting the voil to flow into the plpe 20 and thence through the apertures 21 and 22 to the bearing surfaces. If the pressure .in the pipe 20 rises above a predetermined amount, the check valve 41 Will open and permit a, part of the oil to flow through the pipe` 40 back to the reser- Voir.

It will be observed that my improved construction includes a `by-pass connection which extends directly from the pump cylinder back to the oil reservoir. In this way I, avoid any excessive pressure in the discess .oil -is permitted to flow directly back from the pump cylinder to the reservoir without entering the main discharge pipes.

Under some circumstances it is desirable to provide an automatic lubricating system for the various shaft bearings and for the gears which is independent of the lubricating system for the Ways or bearing surfaces on the bed. ,The oil which is supplied to the ways becomes dirty quite rapidly as the ways are exposed to the atmosphere and receive a considerable amount of'dust, metal chips, etc. The bearings and gears are protected and the oil which is supplied to them can be kept. relatively clean. 'It is therefore desirable to provide two separate bodies of oil which circulate independently of each other.

for planers.

already described except that the bracket 26' is shaped to provide two opposite cylinders 27 and 27a in which` the plunger 2 8 recipro- Cates., The cylinder 27*l is provided with an aperture at its end to permit the insertion of the lun er. This aperture is then closed by a p ug Except for the plug 27b the construction of the cylinder 27a and of the several apertures and valves is the same'as that already described.

A. pipe 43 leads from the discharge outlet of the cylinder 27" and is provided with branches 44 which extend to the several bearings for the shafts 7, 10, 13 and 16. The pipe 43 also has other branches 45 which are adapted to lead oil directly to the teeth of the several'gears. Arranged below the gears and the bearings is a drip pan or reservoir 46 to which surplus oil is returned from the bearings and gears. A suction pipe 47 leads from the reservoir 46 to the inlet of thepump cylinder 27. Leading from the pump cylinder 27a back tothe reservoir 46 is a bypass pipe 48 which serves to permit surplus oil not required for lubrication to be returned to the reservoir 46.

It will be seen that by providing the two reservoirs 18 and 46 and by providing separate pump cylinders'and piping, the bodies of oil for the Ways and for the shaft bearings'and gears are kept separate from each other. v

It will be seen that by my invention I have provided a simple lubricating system which requires very little attention on the part of the operator. Lubrication starts instantly upon the starting 'ol the planer table and stops instantly upon the stopping of the planer table. The peculiar pump construction which I have provided enables me to make use of the main planer driving mechanism for driving the pump notwithstanding the fact that this driving mechanism reverses. Prior to my invention conproviding forced feed lubricating systems Inasmuch as the main drive mechanism reverses, it was not possible to utilize it for drivin a .rotary oil pump such as is commonly use for machine tools; For

this reason a separate electric motor has ,frequently been provided for driving the oil pump and this has involved considerableexlsiderable difficulty has been experienced in? one hand and to avoid deficient lubrication on the other hand, the motor had to be stopped and started each time the operation of the planer was stopped and started. This necessitated either very close attention on the part of the operator or the use of special connections whereby the motor was started and stopped automatically. As before stated all ofrthese diiiiculties and complexities are, avoided by my improved system.

What I claim is:

1. The combination in a planer of a bed, a reciprocating table slid-able on the bed,

'gearing and shafting for driving and reversing the table, a bracket at one side of the bed, a lubricating system comprising a plunger pump mounted on the bracket, piping leading from the pump to the bearing surfaces of the planer, a pump operating shaft connecting with the reversing table drive gearing and extending through the side of the bed to the bracket, and mechanism interposed between the operating shaft and the pump for operating the pump during rotation of the shaft in eachdirection.

2. The combination with a planer bed, a reciprocating table on the bed and reversing gearing for driving the table, of a lubricating system comprising a plunger pump, piping leading from the pump to the ways or bearing surfaces on the bed,la' pump operating shaft'connected with the table drive gearing and reversing when the gearing reverses. two spaced rollers on the plunger, and an eccentric on the operating shaft between the rollers whereby the plunger is reciprocated when the shaft is turned in either direction.

3. The combination with a planer bed, a reciprocating table on the bed and reversing gearing for driving the table, of a lubricating system comprising a reservoir, a plunger pump, a pipe leading from the reservoir to the pump cylinder, piping leading from the outlet of the pump cylinder to the ways or bearing surfaces on the bed. a pump operating shaft connected with the table drive gearing and reversing when the gear- .ing reverses, mechanism interposed between the shaft and the pump for operating the pump during rotation of the shaft in each direction. and means for relieving the pressure in the pump should such pressure exceed a predetermined amount.

4. The combination in a planer of a bed, a reciprocating table slidable on the bed, gearing and shafting for driving and reversing the table. a lubricating system comprising a plunger pump, piping leading from the pump to the bearing surfaces of the gearing and shafting, a pump operating shaft, a gear on the shaft meshing with a gear of the said drive gearing whereby the shaft is driven alternately in opposite directions, .and mechanism interposed between the operating shaft and the pump for operating the pump during rotation of the shaft in each direction. y

5. The combination in a planer of a bed, a reciprocating table slidable on the bed, gearing and shafting for driving and reversing the table, a lubricating system comprising a plunger pump cylinder, piping leading from the pump cylinder to the bearing surfaces of the planer, a second plunger pump cylinder, piping leading from the second pump cylinder to the bearing surfaces of the gearing and shafting, and a single shaft driven by the reversing table drive gearing for operating the p ungers in the said cylinders.

6. The combination with a planer bed, a reciprocating table on the bed and gearing and shafting for driving and reversing the table, of a lubricating system comprising a double-ended plunger pump, piping leading from one end of the pump to the Ways or bearing surfaces on the bed, other piping independent of the first piping leading from the other end of the pump to the 'bearing surfaces of the gearing and shafting, a pump operating shaft connected with the table drive gearing and'reversing when the gearing reverses, and mechanism interposed between the operating shaft and the pump for operating the pump during rotation of the shaft in each direction.

7. The combination with a planer bed, a reciprocating table on the bed 'and gearing and shafting for driving and reversing the table, of a lubricating system comprising a double-ended plunger pump, piping leading from one end of the pump to the Ways or bearing surfaces on the bed, other pi ing independent of the first piping leading rom the other end of the pump to the bearing surfaces of the gearing and shafting, a pump operating shaft connected with the table driv'e gearing and reversing when the gearing reverses, mechanism interposed between the operating shaft and the pump for operating the pump during rotation of the shaft in each direction. independent reservoirs for receiving lubricant from thebearing surfaces on the bed and from the gearing and shafting respectively, and independent pipes leading respectively from the said reservoirs to the corresponding ends of the pump.

In testimony whereof, I hereto aix my signature.

GEORGE E. GREENLEAF.

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