US2550012A - Drill press speed reducing assembly - Google Patents
Drill press speed reducing assembly Download PDFInfo
- Publication number
- US2550012A US2550012A US87699A US8769949A US2550012A US 2550012 A US2550012 A US 2550012A US 87699 A US87699 A US 87699A US 8769949 A US8769949 A US 8769949A US 2550012 A US2550012 A US 2550012A
- Authority
- US
- United States
- Prior art keywords
- pulley
- pulleys
- arm
- drill
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000314 lubricant Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
- F16H9/06—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a stepped pulley
-
- 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
-
- 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
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/65—Means to drive tool
- Y10T408/67—Belt and pulley
Definitions
- arm 21 and 28 is formed with an elongated slot 32 extending lengthwise of said arms.
- Each pulley 25 and 25 is provided with a central bearing 33 which turns on a shaft 34 having its lower end clamped in place lengthwise of said slot 32 by means of a clamping nut 35.
- the latter In order to distribute lubricant to the space between the bearing and the shaft, the latter is provided with the passage 35 leading from the upper end of the shaft into a space'3l provided in the side wall of the shaft. Lubricant supplied by a cup 38 fitted to the upper end of the passage 3% is accordingly conducted to the shaft ing associated with each pulley 25 and 2 5.
- a belt 33 is trained about the smallest step of pulley 20 and the largest step of pulley smallest step' of pulley 25 to the largest step of pulley 25 and a belt 4! is connected from the smallest step of pulley 25 to the largest step of spindle pulley 22.
- the speed of the spindle pulley 22 is accordingly reduced in the ratio of to l and the bearpulleys 2'5 andv speed reduction 26, a belt 49 is connected from the relative to the speed of the motor pulley wherer by a spindle speed of 90 to 100 revolutions per minute is'obtained to accommodate use of drills up to 1 inch diameter and boring tools of a size as large as 3 /2 inch diameter without danger of damaging the tool.
- the clearance available about the spindle pulley is sometimes insul ficient to accommodate an arrangeinent of belt drives as shown in Fig. 1.
- an arm 45 extending upwardly andforwardly from the head 46 to provide a bearin in upward vertical alignment with the axis of the spindle pulley 45 would interfere with a belt drive such as represented by the belt 4
- the present invention contemplates the use of a stub column member 48 adjustably clamped in a slot 49 provided in the outer end of an arm 50, which arm is fastened to the main column 5
- the stub column member 48 accordingly provides a support for a pair of pulley supporting arms 53 and 54, corresponding to the pulley supporting arms 21 and 28 shown in Figs. 1' to 3 inclusive.
- each arm 53 and 54 has a yoke portion 55 clamped to the member 43 by means of clamping bolts 55,
- a pulley 58 mounted on the arm 53 and a similar pulley 59 mounted on the arm 54 thus provide speed reducing means between the spindle pulley 41 and the motor pulley 51, with the pulleys 58 and 59 so positioned relative there-- to aste accommodate a belt connection 60 between the smallest step of pulley 59 and the largest step of spindle pulley 4! without interference by the arm 45 extending from the head A belt 6
- each of the pulleys 41, 51, 58, and 59 is of the five step cone type and that the arm connected to the main column 5
- the slots in the arms supporting said pulleys provide for any ad- 'justment needed in the position of the pulleys to accommodate removal of the belts from one stage or step to another stage or step of the pulleys.
- a drill head supported on said column, a drill spindle on said drill head, a motor, and means connecting the motor and said drill spindle including a multi-step pulley on said drill spindle and a multi-step pulle on'the shaft of said motor, and a pair of supplementary multi-step 1 pulleys, each of said supplementary pulleys being supported in laterally spaced relation to said drill head for rotation about an axis in spaced parallel relation to the axes of said other pulleys,
- a drill press as defined in claim 1, including an arm supporting one of said supplementary pulleys and a second arm supporting the other of said supplementary pulleys, each of said arms being secured to the other in clamping relation to the column of the press.
- a drill press as defined in claim 1 including an arm secured to and projecting laterally from said column of the press, a stub column member carried by the outer end of said arm, a second arm supporting one of said supplementary" pulleys, and a third arm supporting one of the other ofsaid supplementary pulleys, said second and third arms each being secured to the other in clamping relation to said stub column member.
- a drill press as defined in claim 1 in-' cluding an arm secured to and projecting laterally from said column of the press, said arm'having its outer end olfs'etidownwardly in relation to the end thereof secured to said columnar the' press, a stub column membercarried by the outer pulleys is adjustably supported and a second arm 10 having a similar outer end portion in which the other of said supplementar pulleys is adjustably supported, the end of each arm remote from said slotted end having a yoke portion adapted to em- 6 brace the column of the press through an arc of substantially 180 degrees, said yoke portions being bolted, one to the other to secure said arms in clamping relation to said column of the press.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
April 24, 1951 s. KRAFKA 2,550,012
DRILL PRESS SPEED REDUCING ASSEMBLY Filed April 15, 1949 2 Sheets-Sheet l /III Ill/IIIIIQ- April 24, 1951 s. KRAFKA DRILL PRESS SPEED REDUCING ASSEMBLY 2 sheet's sheet- '2 Filed April 15, 1949 IfiENT R 52% 1% arm 21 and 28 is formed with an elongated slot 32 extending lengthwise of said arms. Each pulley 25 and 25 is provided with a central bearing 33 which turns on a shaft 34 having its lower end clamped in place lengthwise of said slot 32 by means of a clamping nut 35. In order to distribute lubricant to the space between the bearing and the shaft, the latter is provided with the passage 35 leading from the upper end of the shaft into a space'3l provided in the side wall of the shaft. Lubricant supplied by a cup 38 fitted to the upper end of the passage 3% is accordingly conducted to the shaft ing associated with each pulley 25 and 2 5.
In'order to establish a driving connection between the pulleys 20 and 22 via the 26, with a view to obtaining a v suitable for operation of comparatively large tools from a conventional motor l 8 in accordance with the present invention, a belt 33 is trained about the smallest step of pulley 20 and the largest step of pulley smallest step' of pulley 25 to the largest step of pulley 25 and a belt 4! is connected from the smallest step of pulley 25 to the largest step of spindle pulley 22. The speed of the spindle pulley 22 is accordingly reduced in the ratio of to l and the bearpulleys 2'5 andv speed reduction 26, a belt 49 is connected from the relative to the speed of the motor pulley wherer by a spindle speed of 90 to 100 revolutions per minute is'obtained to accommodate use of drills up to 1 inch diameter and boring tools of a size as large as 3 /2 inch diameter without danger of damaging the tool.
Due to variations in the design and construetion of drill heads of certain types of drill presses, the clearance available about the spindle pulley is sometimes insul ficient to accommodate an arrangeinent of belt drives as shown in Fig. 1. In connection with drill presses such as the type shown in Fig. 4, an arm 45 extending upwardly andforwardly from the head 46 to provide a bearin in upward vertical alignment with the axis of the spindle pulley 45 would interfere with a belt drive such as represented by the belt 4| shown in Fig. 2. In such a case the present invention contemplates the use of a stub column member 48 adjustably clamped in a slot 49 provided in the outer end of an arm 50, which arm is fastened to the main column 5| of the press by a clamp 52. The stub column member 48 accordingly provides a support for a pair of pulley supporting arms 53 and 54, corresponding to the pulley supporting arms 21 and 28 shown in Figs. 1' to 3 inclusive. As shown in Fig. 5 and Fig. 6, each arm 53 and 54 has a yoke portion 55 clamped to the member 43 by means of clamping bolts 55,
with the arms 53 and 54 extending along a line in spaced parallel relation to a line joining the spindle pulley 4'1 and a pulley 51 on the shaft of the motor. A pulley 58 mounted on the arm 53 and a similar pulley 59 mounted on the arm 54 thus provide speed reducing means between the spindle pulley 41 and the motor pulley 51, with the pulleys 58 and 59 so positioned relative there-- to aste accommodate a belt connection 60 between the smallest step of pulley 59 and the largest step of spindle pulley 4! without interference by the arm 45 extending from the head A belt 6| connecting the smallest step of 46. pulley 58 and the largest step of pulley 59, and a belt 62 connecting the smallest step of motor pulley 51 and the largest step of pulley 58 accordingly operate to reduce the speed of the spindle pulley 41 in the ratio of about to 1 relative to the motor pulley 51. It will be noted that'each of the pulleys 41, 51, 58, and 59 is of the five step cone type and that the arm connected to the main column 5| of the press is offset downwardly at the end thereof carrying the stub column member 48 whereby the steps of the supplementary pulleys 58 and 59 may be maintained in horizontal alignment with the steps of the pulleys 41 and 51.
It willbe understood, of course, that the variations in 'thespeed of the spindle, with reference to the pulleys shown in Figs. 1 to 3 inclusive as well as the pulleys shown in Figs. 4 to 6 inclusive,
"may be accomplished by changing the belts to different stages 'of the pulleys.
The slots in the arms supporting said pulleys provide for any ad- 'justment needed in the position of the pulleys to accommodate removal of the belts from one stage or step to another stage or step of the pulleys.
It is believed that the gnany advantages of a drill press attachment constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed. What is claimed is:
1. In a drill press, the combination of a column,
'a drill head supported on said column, a drill spindle on said drill head, a motor, and means connecting the motor and said drill spindle including a multi-step pulley on said drill spindle and a multi-step pulle on'the shaft of said motor, and a pair of supplementary multi-step 1 pulleys, each of said supplementary pulleys being supported in laterally spaced relation to said drill head for rotation about an axis in spaced parallel relation to the axes of said other pulleys,
a belt connecting said pair of supplementary multi-step pulleys, a belt connecting the pulley on the shaft of the motor and one of said supplementary pulleys, and a belt connecting the pulley on the spindle and the other of said supplementary pulleys.
2. In a drill press as defined in claim 1, including an arm supporting one of said supplementary pulleys and a second arm supporting the other of said supplementary pulleys, each of said arms being secured to the other in clamping relation to the column of the press.
3. In a drill press as defined in claim 1, in -1' cluding an arm having an elongated slotted outer end portion in which one of said supplementary pulleys is adjustably supported and a second arm having a similar slotted outer end portion in which the other of said supplementary pulleys is adjustably supported, the end of each arm remote from said slotted'end being secured to the other in clamping relation to the column of the press.
4:. In a drill press as defined in claim 1 including an arm secured to and projecting laterally from said column of the press, a stub column member carried by the outer end of said arm, a second arm supporting one of said supplementary" pulleys, and a third arm supporting one of the other ofsaid supplementary pulleys, said second and third arms each being secured to the other in clamping relation to said stub column member. H 5. In a drill press as defined in claim 1 in-' cluding an arm secured to and projecting laterally from said column of the press, said arm'having its outer end olfs'etidownwardly in relation to the end thereof secured to said columnar the' press, a stub column membercarried by the outer pulleys is adjustably supported and a second arm 10 having a similar outer end portion in which the other of said supplementar pulleys is adjustably supported, the end of each arm remote from said slotted end having a yoke portion adapted to em- 6 brace the column of the press through an arc of substantially 180 degrees, said yoke portions being bolted, one to the other to secure said arms in clamping relation to said column of the press.
STEFAN KRAFKA.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,022,756 Rice Apr. 9, 1912 2,073,704 Mitchell Mar. 16, 1937
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87699A US2550012A (en) | 1949-04-15 | 1949-04-15 | Drill press speed reducing assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87699A US2550012A (en) | 1949-04-15 | 1949-04-15 | Drill press speed reducing assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
US2550012A true US2550012A (en) | 1951-04-24 |
Family
ID=22206741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US87699A Expired - Lifetime US2550012A (en) | 1949-04-15 | 1949-04-15 | Drill press speed reducing assembly |
Country Status (1)
Country | Link |
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US (1) | US2550012A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2674896A (en) * | 1951-09-22 | 1954-04-13 | Advance Machine Co | Drive unit for floor polishing machines and the like |
US3051010A (en) * | 1960-07-15 | 1962-08-28 | Oscar C Blomgren | Speed changing assembly for power takeoff shafts |
US3135499A (en) * | 1959-07-01 | 1964-06-02 | Cowles Dissolver Company Inc | Material mixing and dispersing apparatus |
US4545192A (en) * | 1980-06-14 | 1985-10-08 | Barmag Barmer Maschinenfabrik Ag | Yarn false twisting apparatus |
US4832663A (en) * | 1987-12-11 | 1989-05-23 | The Bouligny Company | Method and apparatus for changing wind ratio on precision winder |
US6102633A (en) * | 1998-04-02 | 2000-08-15 | Milwaukee Electric Tool Corporation | Feed system for a drill press |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1022756A (en) * | 1906-03-02 | 1912-04-09 | Charles De Los Rice | Belt-gearing. |
US2073704A (en) * | 1935-07-13 | 1937-03-16 | Walter G Mitchell | Drill press |
-
1949
- 1949-04-15 US US87699A patent/US2550012A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1022756A (en) * | 1906-03-02 | 1912-04-09 | Charles De Los Rice | Belt-gearing. |
US2073704A (en) * | 1935-07-13 | 1937-03-16 | Walter G Mitchell | Drill press |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2674896A (en) * | 1951-09-22 | 1954-04-13 | Advance Machine Co | Drive unit for floor polishing machines and the like |
US3135499A (en) * | 1959-07-01 | 1964-06-02 | Cowles Dissolver Company Inc | Material mixing and dispersing apparatus |
US3051010A (en) * | 1960-07-15 | 1962-08-28 | Oscar C Blomgren | Speed changing assembly for power takeoff shafts |
US4545192A (en) * | 1980-06-14 | 1985-10-08 | Barmag Barmer Maschinenfabrik Ag | Yarn false twisting apparatus |
US4832663A (en) * | 1987-12-11 | 1989-05-23 | The Bouligny Company | Method and apparatus for changing wind ratio on precision winder |
US6102633A (en) * | 1998-04-02 | 2000-08-15 | Milwaukee Electric Tool Corporation | Feed system for a drill press |
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