US3217556A - Attachment for drill press - Google Patents

Attachment for drill press Download PDF

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US3217556A
US3217556A US316277A US31627763A US3217556A US 3217556 A US3217556 A US 3217556A US 316277 A US316277 A US 316277A US 31627763 A US31627763 A US 31627763A US 3217556 A US3217556 A US 3217556A
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housing
shaft
attachment
slower
drill press
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US316277A
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Loren P Conover
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/043—Accessories for spindle drives
    • B23Q5/048—Speed-changing devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19679—Spur
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2186—Gear casings

Definitions

  • This invention relates to an attachment that converts a drill press of one maximum size to one for drilling holes of a larger size than the capacity of the original press.
  • This invention is an improvement of the improvements disclosed in my Patent No. 2,784,614, issued May 12, 1957.
  • An object of the present invention is to provide a simplified and less costly structure that effects an efficient transfer of power from the input to the torque-applying spindle by means of a simplified and powerful speed reducer.
  • Another object of the invention is to provide an attachment as characterized that has a trimmer, less bulky shape, giving improved visibility of the work and, there fore, more efiicient operation.
  • a further object of the invention is to provide a drill press attachment that incorporates features of safety to insure against unduly stressing the reducing gears of the attachment.
  • a still further object of the invention is to provide an attachment as above that is sealed against leakage of lubricant housed in the body of the same.
  • This invention also has for its objects to provide such means that are positive in operation, convenient in use, easily installed in a working position and easily disconnectedtherefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.
  • the invention also comprises novel detail-s of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description and which is based on the accompanying drawing.
  • said drawing merely shows, and the following description merely describes, one embodiment of the present invention, which is given by way of illustration or example only.
  • FIG. 1 is a side elevational view of an attachment according to the present invention.
  • FIG. 2 is an enlarged vertical sectional view thereof.
  • FIG. 3 is a plan view, to a scale between that of FIG. 1 and FIG. 2, showing the present attachment in operative position relative to the column of a drill press.
  • the present attachment 5 is shown in operative relation to a drill press column 6 and is held non-rotationally by an arm 7 that extends from the attachment, a lengthadjustable sleeve 8 on said arm and a coil spring around the column 6 and connected by its ends 9 to said sleeve. It is understood that the attachment is mounted on the axis of the drill press drive shaft or arbor, and that the above-described means holds steady the attachment 5 during drive thereof by the press arbor.
  • the attachment 5 comprises, generally, a housing 10, an input shaft or shank 11 extending into the housing from above, the same being adapted for separable connection to the mentioned press arbor to be rotated thereby, an output shaft 12 axially aligned with the shank 11, a single taper roller bearing 13 interengaging the adjacent ends of said shank 11 and shaft 12, a countershaft 14 in the housing parallel to the shaft 12, a first stage reducing gearing 15 between the shank 11 and said countershaft, a second stage reducing gearing 16 between said countershaft and the shaft 12, shear means 17 connecting the shaft 12 and said reducing gearing 16 to shear in the ice event of excessive torque resistance on the shaft 12, and leakage sealing means 18.
  • the housing 10 comprises a body 20 that has a through bore 21, and a parallel, smaller bore 22, said bores being in communication at 23 at the lower portion of the body.
  • a cap plate 24 closes the top of the body and has a bore 25 that is an axial extension of bore 21 and a communicating bore coaxial with the bore 22 of the body.
  • a bottom plate 26 closes the bottom of the body.
  • the body 20 has flattened sides, as seen in FIG. 3, the bore 21 forming side walls 27. Vertically elongated openings 28 are formed in said walls, as best seen in FIG. I.
  • the body is formed with a laterally extending portion 29 in which is shown a tapped seat 30 for an end of the arm 7.
  • the input shank 11 is provided with an upper end 31 that is adapted for separable connection to a press arbor to be rotationally driven thereby.
  • Said shank extends through an opening 32 in the cap plate and through a radial bearing 33 in the bore 25 of said cap plate.
  • Integrally formed on the shank 11 is a spur pinion 34 in the bore 25 beneath the bearing 33, an integral pilot extension 35 of the shank 11 being engaged in the inner race of the mentioned taper roller bearing 13.
  • Said pinion 34 is the fast gear of the first stage reducing gearing 15.
  • the output shaft 12 at its upper end, is fitted into the inner race of a radial bearing 36 mounted in the bore 21 of the body 20.
  • the outer race of the taper roller bearing 13 is also fitted into said inner race.
  • the pilot extension 35 of the shank 11 and the upper end of the shaft 12 are retained in alignment by the radial properties of bearing 13 and the same are in anti-friction end thrust engagement due to the thrust-taking properties of said bearing 13.
  • a radial bearing 37 partly in the bore 21 of the body 20 and partly in an aligned bore in the bottom plate 26, is mounted so as to journal the shaft 12 in cooperation with the bearing 36.
  • Said shaft is provided, in its lower portion with a tapered.
  • socket 38 that is adapted to receive the similarly tapered shank of a drilling or similar tool of conventional design.
  • Shaft 12 is shown with a knock-out slot 39 that extends from the upper end of socket 38 and in approximate register with the openings 28 in the housing body, as best seen in FIG. 1.
  • the shank of a tool carried by the shaft 12, extends partly into the body, providing for a close-coupled arrangement of tool and attachment that minimizes flexure of the tool during a drilling or boring operation. It will be clear the openings 28 afford access to the slot 39 for a tool-dislodging member.
  • a ring or washer 40 is held by the cap plate 24 in a hold-down relation to the upper radial bearing 36.
  • the bearings 33, 36 and 37 be sealed bearings, i.e., those that will not pass lubricant therethrough and which retain pre-packed lubricant.
  • the first stage reducing gear 15 comprises the mentioned pinion 34 on the shank 11 and a mating gear 41 on the countershaft 14.
  • a pilot extension 42 on the countershaft 12 is held by a needle bearing 43 journalled in the cap plate 24.
  • the ratio of the gears 34 and 41 is shown, in this case, at about one to three and one-half.
  • the second stage reducing gearing 16 comprises a pinion gear 44 integral on the lower end of the countershaft 14, and a ring gear 45 mating therewith and carried by the shaft 12.
  • the ratio of these gears may be in the nature of one to three or three and one-half, thereby providing an overall reducing ratio of one to ten or twelve, as desired, with a commensurate increase in power; a
  • pilot extension 46 on the lower end of the countershaft 14 is held by a needle bearing 47 journalled in the lower portion of the body 20.
  • the shear means 17 is shown as shear pins 48 connecting the shaft 12 and the ring gear 45. The same will shear under excessive resistance to the torque on the shaft by the tool carried by said shaft, thereby saving wear or reakage of the gear teeth of the several gears. Such pins are easily replaced, since they may be knocked out and replaced without disassembling the tool, because of access thereto through either of the. slots 28.
  • a drill press attachment comprising:
  • the slower shaft having a tool-receiving socket and a knock-out slot longitudinally aligned with the mentioned openings in the housing to provide access for a member to dislodge a tool fitted into said socket.
  • a drill press attachment according to claim 1 in which an element of said reducing gear is mounted on the slower shaft, and shear means connects said element and slower shaft to shear under excessive resistance to torque of the latter shaft.
  • a drill press attachment according to claim 1 in which seals between the housing and the slower shaft are provided above and below the openings in the housing to obviate lubricant leakage through said openings.
  • ('c) means to connect said sleeve to the column of said press.
  • a drill press attachment comprising:
  • the slower shaft having a tool-receiving socket and a knock-out slot longitudinally aligned with the mentioned openings in the housing to provide access for a member to dislodge a tool fitted into said socket.

Description

Nov. 16, 1965 L. P. CONOVER 3,217,555
ATTACHMENT FOR DRILL PRESS Filed Oct. 15, 1965 INVENTOR. ZUEEN P. CUNOVEIQ A TTOE/V'EY United States Patent 3,217,556 ATTACHMENT F R DRILL PRESS Loren P. Conover, Glendora, Calif, assignor of forty-five percent to Rene Pfister, Monterey Park, Calif.
Filed Oct. 15, 1963, Ser. No. 316,277 6 Claims. (Cl. 74-421) This invention relates to an attachment that converts a drill press of one maximum size to one for drilling holes of a larger size than the capacity of the original press. This invention is an improvement of the improvements disclosed in my Patent No. 2,784,614, issued May 12, 1957.
An object of the present invention is to provide a simplified and less costly structure that effects an efficient transfer of power from the input to the torque-applying spindle by means of a simplified and powerful speed reducer.
Another object of the invention is to provide an attachment as characterized that has a trimmer, less bulky shape, giving improved visibility of the work and, there fore, more efiicient operation.
A further object of the invention is to provide a drill press attachment that incorporates features of safety to insure against unduly stressing the reducing gears of the attachment.
A still further object of the invention is to provide an attachment as above that is sealed against leakage of lubricant housed in the body of the same.
'1 This invention also has for its objects to provide such means that are positive in operation, convenient in use, easily installed in a working position and easily disconnectedtherefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.
1 The invention also comprises novel detail-s of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description and which is based on the accompanying drawing. However, said drawing merely shows, and the following description merely describes, one embodiment of the present invention, which is given by way of illustration or example only.
In the drawing, like reference characters designate similar parts in the several views.
FIG. 1 is a side elevational view of an attachment according to the present invention.
FIG. 2 is an enlarged vertical sectional view thereof.
FIG. 3 is a plan view, to a scale between that of FIG. 1 and FIG. 2, showing the present attachment in operative position relative to the column of a drill press.
The present attachment 5 is shown in operative relation to a drill press column 6 and is held non-rotationally by an arm 7 that extends from the attachment, a lengthadjustable sleeve 8 on said arm and a coil spring around the column 6 and connected by its ends 9 to said sleeve. It is understood that the attachment is mounted on the axis of the drill press drive shaft or arbor, and that the above-described means holds steady the attachment 5 during drive thereof by the press arbor.
The attachment 5 comprises, generally, a housing 10, an input shaft or shank 11 extending into the housing from above, the same being adapted for separable connection to the mentioned press arbor to be rotated thereby, an output shaft 12 axially aligned with the shank 11, a single taper roller bearing 13 interengaging the adjacent ends of said shank 11 and shaft 12, a countershaft 14 in the housing parallel to the shaft 12, a first stage reducing gearing 15 between the shank 11 and said countershaft, a second stage reducing gearing 16 between said countershaft and the shaft 12, shear means 17 connecting the shaft 12 and said reducing gearing 16 to shear in the ice event of excessive torque resistance on the shaft 12, and leakage sealing means 18.
The housing 10 comprises a body 20 that has a through bore 21, and a parallel, smaller bore 22, said bores being in communication at 23 at the lower portion of the body. A cap plate 24 closes the top of the body and has a bore 25 that is an axial extension of bore 21 and a communicating bore coaxial with the bore 22 of the body. A bottom plate 26 closes the bottom of the body. In this form of the invention, the body 20 has flattened sides, as seen in FIG. 3, the bore 21 forming side walls 27. Vertically elongated openings 28 are formed in said walls, as best seen in FIG. I. The body is formed with a laterally extending portion 29 in which is shown a tapped seat 30 for an end of the arm 7.
The input shank 11 is provided with an upper end 31 that is adapted for separable connection to a press arbor to be rotationally driven thereby. Said shank extends through an opening 32 in the cap plate and through a radial bearing 33 in the bore 25 of said cap plate. Integrally formed on the shank 11 is a spur pinion 34 in the bore 25 beneath the bearing 33, an integral pilot extension 35 of the shank 11 being engaged in the inner race of the mentioned taper roller bearing 13. Said pinion 34 is the fast gear of the first stage reducing gearing 15.
. The output shaft 12, at its upper end, is fitted into the inner race of a radial bearing 36 mounted in the bore 21 of the body 20. The outer race of the taper roller bearing 13 is also fitted into said inner race. Thus, the pilot extension 35 of the shank 11 and the upper end of the shaft 12 are retained in alignment by the radial properties of bearing 13 and the same are in anti-friction end thrust engagement due to the thrust-taking properties of said bearing 13. A radial bearing 37, partly in the bore 21 of the body 20 and partly in an aligned bore in the bottom plate 26, is mounted so as to journal the shaft 12 in cooperation with the bearing 36. Said shaft is provided, in its lower portion with a tapered. socket 38 that is adapted to receive the similarly tapered shank of a drilling or similar tool of conventional design. Shaft 12 is shown with a knock-out slot 39 that extends from the upper end of socket 38 and in approximate register with the openings 28 in the housing body, as best seen in FIG. 1.
By means of the above arrangement, the shank of a tool, carried by the shaft 12, extends partly into the body, providing for a close-coupled arrangement of tool and attachment that minimizes flexure of the tool during a drilling or boring operation. It will be clear the openings 28 afford access to the slot 39 for a tool-dislodging member.
As can be seen in FIG. 2 a ring or washer 40 is held by the cap plate 24 in a hold-down relation to the upper radial bearing 36. In this construction it is preferred that the bearings 33, 36 and 37 be sealed bearings, i.e., those that will not pass lubricant therethrough and which retain pre-packed lubricant.
The first stage reducing gear 15 comprises the mentioned pinion 34 on the shank 11 and a mating gear 41 on the countershaft 14. A pilot extension 42 on the countershaft 12 is held by a needle bearing 43 journalled in the cap plate 24. The ratio of the gears 34 and 41 is shown, in this case, at about one to three and one-half.
The second stage reducing gearing 16 comprises a pinion gear 44 integral on the lower end of the countershaft 14, and a ring gear 45 mating therewith and carried by the shaft 12. The ratio of these gears may be in the nature of one to three or three and one-half, thereby providing an overall reducing ratio of one to ten or twelve, as desired, with a commensurate increase in power; a
pilot extension 46 on the lower end of the countershaft 14 is held by a needle bearing 47 journalled in the lower portion of the body 20.
The shear means 17 is shown as shear pins 48 connecting the shaft 12 and the ring gear 45. The same will shear under excessive resistance to the torque on the shaft by the tool carried by said shaft, thereby saving wear or reakage of the gear teeth of the several gears. Such pins are easily replaced, since they may be knocked out and replaced without disassembling the tool, because of access thereto through either of the. slots 28.
Since the bore 21 is open due to the slots 28, the various O-rings 18, as shown, are provided to prevent leakage of lubricant that may spill from said slots 28.
Since drill presses are but examples of the type of machine on which the present attachment may be used, the same should be considered as generic.
While the foregoing has illustrated and described what is now contemplated to be the best mode of carrying out the invention, the construction is, of course, subject to modification without departing from the spirit and scope of the invention. Therefore, it is not desired to restrict the invention to the particular form of construction illustrated and described, but to cover all modifications that may fall within the scope of the appended claims.
Having thus described this invention, what is claimed and desired to be secured by Letters Patent is:
1. A drill press attachment comprising:
(a) a housing adapted to be mounted on the arbor of said press and having lateral knock-out openings,
(b) means to hold the housing non-rotational,
(c) axially aligned input and output shafts extending in opposite directions from said housing with a major portion of the output shaft disposed within the housing,
(d) a thrust-receiving bearing carried by one of said shafts and in thrust-taking engagement with the other,
(e) reducing gearing in the housing inter-connecting the shafts to drive one shaft slower than the other, and
(f) the slower shaft having a tool-receiving socket and a knock-out slot longitudinally aligned with the mentioned openings in the housing to provide access for a member to dislodge a tool fitted into said socket.
2. A drill press attachment according to claim 1 in which an element of said reducing gear is mounted on the slower shaft, and shear means connects said element and slower shaft to shear under excessive resistance to torque of the latter shaft.
3. A drill press attachment according to claim 1 in which seals between the housing and the slower shaft are provided above and below the openings in the housing to obviate lubricant leakage through said openings.
4. A drill press attachment according to claim 1 in which the reducing gearing comprises first and second reducing stages, and a shear connection between the slower shaft and the second reducing stage to shear under excessive resistance to torque of said latter shaft.
5. A drill press attachment according to claim 1 in which the housing holding means comprises:
(a) a rigid lateral arm on the housing,
(b) a length-adjustable sleeve on said arm, and
('c) means to connect said sleeve to the column of said press.
6. A drill press attachment comprising:
(a) a housing adapted to be mounted on the arbor of said press and having lateral knock-out openings,
(b) means to hold the housing non-rotational,
(c) axially aligned input and output shafts extending in opposite directions from said housing with a major portion of the output shaft disposed within the housing,
((1) a thrust-receiving bearing carried by one of said shafts and in thrust-taking engagement with the other,
(e) reducing gearing in the housing inter-connecting the shafts to drive one shaft slower than the other,
(f) a radial bearing for the faster shaft,
(g) two longitudinally spaced radial bearings for the slower shaft, and
(h) the slower shaft having a tool-receiving socket and a knock-out slot longitudinally aligned with the mentioned openings in the housing to provide access for a member to dislodge a tool fitted into said socket.
References Cited by the Examiner UNITED STATES PATENTS 1,444,343 2/1923 Goodwin 74-421 1,674,200 6/1928 Gatten 74421 2,428,049 9/1947 Tate 74421 X DON A, WAITE, Primary Examiner.

Claims (1)

  1. 6. A DRILL PRESS ATTACHMENT COMPRISING: (A) A HOUSING ADAPTED TO BE MOUNTED ON THE ARBOR OF SAID PRESS AND HAVING LATERAL KNOCK-OUT OPENINGS, (B) MEANS TO HOLD THE HOUSING NON-ROTATIONAL, (C) AXIALLY ALIGNED INPUT AND OUTPUT SHAFTS EXTENDING IN OPPOSITE DIRECTIONS FROM SAID HOUSING WITH A MAJOR PORTION OF THE OUTPUT SHAFT DISPOSED WITHIN THE HOUSING, (D) A THRUST-RECEIVING BEARING CARRIED BY ONE OF SAID SHAFTS AND IN THRUST-TAKING ENGAGEMENT WITH THE OTHER, (E) REDUCING GEARING IN THE HOUSING INTER-CONNECTING THE SHAFTS TO DRIVE ONE SHAFT SLOWER THAN THE OTHER, (F) A RADIAL BEARING FOR THE FASTER SHAFT, (G) TWO LONGITUDINALLY SPACED RADIAL BEARINGS FOR THE SLOWER SHAFT, AND (H) THE SLOWER SHAFT HAVING A TOOL-RECEIVING SOCKET AND A KNOCK-OUT SLOT LONGITUDINALLY ALIGNED WITH THE MENTIONED OPENINGS IN THE HOUSING TO PROVIDE ACCESS FOR A MEMBER TO DISLODGE A TOOL FITTED INTO SAID SOCKET.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594911A (en) * 1984-09-11 1986-06-17 Getriebelbau-Nord Schlicht & Kuchenmeiser Gmbh & Co Gear housing
US20170276214A1 (en) * 2016-03-25 2017-09-28 Jerry M. Cockrell Split frame gearbox
US20190054586A1 (en) * 2017-08-18 2019-02-21 Taiwan Rong Fu Industrial Co., Ltd. Driving shaft for machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1444343A (en) * 1921-05-10 1923-02-06 Irvin A Goodwin Reduction gearing for drills
US1674200A (en) * 1927-06-14 1928-06-19 William S Gatten Reduction gearing
US2428049A (en) * 1943-10-26 1947-09-30 Rockwell Mfg Co Drill press

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1444343A (en) * 1921-05-10 1923-02-06 Irvin A Goodwin Reduction gearing for drills
US1674200A (en) * 1927-06-14 1928-06-19 William S Gatten Reduction gearing
US2428049A (en) * 1943-10-26 1947-09-30 Rockwell Mfg Co Drill press

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594911A (en) * 1984-09-11 1986-06-17 Getriebelbau-Nord Schlicht & Kuchenmeiser Gmbh & Co Gear housing
US20170276214A1 (en) * 2016-03-25 2017-09-28 Jerry M. Cockrell Split frame gearbox
US20190054586A1 (en) * 2017-08-18 2019-02-21 Taiwan Rong Fu Industrial Co., Ltd. Driving shaft for machine

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