US2484471A - Hammer drill - Google Patents

Hammer drill Download PDF

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Publication number
US2484471A
US2484471A US794009A US79400947A US2484471A US 2484471 A US2484471 A US 2484471A US 794009 A US794009 A US 794009A US 79400947 A US79400947 A US 79400947A US 2484471 A US2484471 A US 2484471A
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US
United States
Prior art keywords
shaft
cam
sleeve
hammer drill
drill
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
Application number
US794009A
Inventor
Charles A Shinn
Original Assignee
Charles A Shinn
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Priority to US794009A priority Critical patent/US2484471A/en
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Publication of US2484471A publication Critical patent/US2484471A/en
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Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D11/00Portable percussive tools with electromotor or other motor drive
    • B25D11/06Means for driving the impulse member
    • B25D11/10Means for driving the impulse member comprising a cam mechanism
    • B25D11/102Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool
    • B25D11/106Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool cam member and cam follower having the same shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2211/00Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06Means for driving the impulse member
    • B25D2211/062Cam-actuated impulse-driving mechanisms
    • B25D2211/067Cam-actuated impulse-driving mechanisms wherein the cams are involved in a progressive mutual engagement with increasing pressure of the tool to the working surface
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18024Rotary to reciprocating and rotary
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18056Rotary to or from reciprocating or oscillating
    • Y10T74/18296Cam and slide
    • Y10T74/18304Axial cam

Description

c. A. SHlNN 2,484,471

HAMMER DRILL 2 Sheets-Sheet l Filed Dec. 26, 1947 INVENTOR.

Wet: ive/v5);

Oct. 11, 1949. c. A. SHINN 2,484,471

HAMMER DRILL Filed Dec. 26, 1947 2 Sheets-Sheet 2 4. IN V EN TOR.

Patented Oct. 11, 1949 UNITED STATES PATENT OFFICE HAMMER DRILL Charles A. Shinn, Cbeltenham, Pa.

Application December 28, 1947, Serial No. 794,009

2 Claim. (CI. 74-22) This invention relates to hammer drills.

An object of the invention is the .provision of hammer drills which may. be converted readily into an ordinary drill by releasing a pin to permit a cam to revolve simultaneously with a positively driven cam, the first-mentioned cam when retained against rotation by the pin causing reciprocation of the second cam when the irregular face of the driven cam is revolved against a complementation face of the releasably retained cam for imparting a sliding motion to a bit.

A further object of the invention is the provision of a hammer drill that may be converted into an ordinary drill by releasing a member having a cam face acting against a complementary cam face on a second member fixed to a driven shaft, said coacting cam faces causing reciprocation of the shaft and a bit-equipped chuck, means being employed for releasably retaining the first-mentioned member against rotation, said shaft being revolved by a gear fixed on the shaft and slidably in mesh with a gear driven by a motor.

The invention consists in the novel construction, arrangement and combinations of parts hereinafter more particularly described and claimed.

In the drawings:

Figure 1 is a fragmentary front view in elevation of a convertible hammer drill,

Figure 2 is a longitudinal vertical section of the hammer drill taken along the line 2--2 of Figure 1,

Figure 3 is a horizontal transverse section taken along the line 3-3 of Figure 1,

Figure 4 is a fragmentary vertical section showing the arrangement of a pair of cooperating cams on a driven shaft,

Figure 5 is a fragmentary rear view showing the arrangement of the cams, operating gear and a bearing for the inner end of a driving shaft.

Figure 6 is a view in elevation of a combined gear and cam in detached relation, and

Figure 7 is a view in elevation of a cam cooperating with the cam shown in Figure 6 for producing a reciprocatory motion of the drill bit.

Referring more particularly to the drawings l designates a casing suitable for housing the various instrumentalities of the device. Said casing includes a passage for a bearing I l at the reduced front end and a passage at the outer end for a bearing l2. Said bearings are fitted neatly into their respective passages.

A driven shaft I3 is received by the bearings II and I2 and has a coupling means or chuck l4 which supports a bit l at the outer end of said shaft. The inner end of the shaft carries a thrust bearing l6 abutting the inner end of a Journal box IT for the bearing sleeve l2. Said journal box is formed integrally with the casing.

A gear 26 has an integrally formed sleeve 2| which is pinned at 22 to the shaft ii. A driving gear 22 is revolved by a shaft 24 that in turn is rotated by a motor (not shown) mounted in the easing II. The gear 20 is slidabl in mesh with the gear 22.

A bearing 26 has a tight-fit within a cam sleeve 26. The bearing however, is loosely received by the shaft II. The sleeve 2| has a cam face 21 (Figure 6) adapted to contact a cam face 26 (Figure 7) on the end of the sleeve 26. A coil spring 29 on the shaft l3 and disposed between the front wall lid of the housing and the gear 26 forces the shaft inwardly so that the cam faces will always be in contact with each other. Each of these faces have high points or curved ribs 21a and interfitting alternately disposed depressions 28a.

A plunger 36 having a. manipulating knob 3| is slidably mounted in a passage 32 formed in an offset portion 33 of the casing Ill. This offset has a passage 34' at right angles to the passage 33 and opening into said passage. A detent 35 at the inner end of the passage 34 is pressed into one of the notches 36 or 31 by a spring 38 held in place by a set screw 39. The plunger 30 has a reduced end to provide a pin 40 received by a pocket 4| in the sleeve 26.

The operation of my device is as follows: When the device is employed as a hammer drill the plunger is forced inwardly until the end 46 is seated in the pocket 4| of the sleeve 26 whereby the sleeve and its cam face 28 will be maintained stationary. The detent seated 1n the notch 36 will retain the plunger in this posltlOll. Rota tion of the shaft will cause the face 21 on the sleeve 2| to revolve on the cam face 26 thereby forcing the shaft to move outwardly against the tension of the spring 29 when the high points of the cam faces are in contact. The spring will return the shaft inwardly when the high points on the cam faces mesh with the complemental depression in the faces.

If it be desired to operate the device as an ordinary drill the plunger 30 is pulled outwardly. The sleeve 26 will then rotate with the sleeve 2| and the shaft. The spring will exert sufficient pressure on the sleeve 2| and shaft l3 to maintain the sleeves 2| and 26 temporarily in clamped relation. The plunger 30 at this time retained in position by the detent 66 which is seated in the pocket 31.

3 What I claim:

1. A hammer drill adapted to be converted into an ordinary drill comprising a casinl. a shaft mounted for rotation and reciprocation in the casing. coupling means on one end of said shaft for carrying a tool, means for revolving the shaft. a sleeve slidably mounted on the other end of the shaft and provided with a cam at one end,

a second sleeve secured on the shaft intermediin the opposite direction while the spring alternately returns said shaft, and means releasing the connecting means between the first sleeve and the casing to cause the sleeves to revolve in synchronlsm. '7

2. A hammer drill adapted to be converted into an ordinary drill comprising a casing, a. shaft mounted for rotation and reciprocation in the casing, coupling means on one end of said shaft for carrying a tool means for revolving the shaft. a sleeve slidably mounted on the other end of the shaft and provided with a cam at one end. a second sleeve secured on the shaft intermediate said coupling means and said first sleeve and having a cam at one end adapted to be engaged by the cam on the first sleeve, a spring urging the shaft in one direction for retaining thecams in engagement, the first sleeve having a pocket, I, plunger slidably mounted in a passage in the easing and provided with a pin received by the pocket for retaining said sleeve against rotation so that when the shaitis rotated the second-mentioned cam will ride over the first-mentioned cam and -move the shaft longitudinally in the opposite direction while the spring alternately returns said shaft, and means for manually releasing the plunger to cause the sleeves to revolve in synchronism.

CHARLES A. BHINN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS DemonetQ. Sept. 12, mos

US794009A 1947-12-26 1947-12-26 Hammer drill Expired - Lifetime US2484471A (en)

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US794009A US2484471A (en) 1947-12-26 1947-12-26 Hammer drill

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566661A (en) * 1948-10-09 1951-09-04 Ingersoll Rand Co Power-operated impact wrench
US2621614A (en) * 1950-09-18 1952-12-16 Edgar A Walling Ice cream scoop
US2622465A (en) * 1949-09-01 1952-12-23 Crane Co Apparatus for stressing bolts and studs
US2654257A (en) * 1950-02-08 1953-10-06 United Shoe Machinery Corp Electrically powered blind riveting tool
US2703029A (en) * 1952-12-08 1955-03-01 Steukers Gilles Axial impact type percussive tool
US2804778A (en) * 1952-08-26 1957-09-03 Wallace & Tiernan Company Inc Variable driving mechanism
US2889711A (en) * 1955-08-22 1959-06-09 Morris Joseph Hammer
US2974535A (en) * 1958-09-08 1961-03-14 Morris Joseph Mechanical hammer
US2998086A (en) * 1954-09-27 1961-08-29 Joseph Morris Reciprocating core drill
US3006202A (en) * 1958-03-17 1961-10-31 Samuel J Forbes Rotary and percussive tool
US3242764A (en) * 1964-04-23 1966-03-29 Gen Motors Corp Adjustable control mechanism
US3370655A (en) * 1965-03-03 1968-02-27 Dibotec A G Tools for driving anchor studs
US3661018A (en) * 1970-06-05 1972-05-09 Richard K Keefer Electric brusher
US3913685A (en) * 1974-02-06 1975-10-21 Illinois Tool Works Fastener driving tool
US3924692A (en) * 1974-02-06 1975-12-09 Illinois Tool Works Fastener driving tool
US4397055A (en) * 1980-10-20 1983-08-09 Cuchiara Samuel M Reversable shaft with rotary and selective oscillating motion
US5402604A (en) * 1993-03-17 1995-04-04 Ryobi Motor Products Oscillating spindle sander
US6102787A (en) * 1994-04-26 2000-08-15 Emerson Electric Co. Oscillating combination belt, spindle and edge sander
US6569002B2 (en) 1999-12-10 2003-05-27 Porter-Cable/Delta Hand-held oscillating spindle sander
US20130199072A1 (en) * 2012-02-02 2013-08-08 Kevin Richter Motorized firearm barrel cleaning system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US302430A (en) * 1884-07-22 Hand-piece for dental engines
US504912A (en) * 1893-09-12 Dental mallet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US302430A (en) * 1884-07-22 Hand-piece for dental engines
US504912A (en) * 1893-09-12 Dental mallet

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566661A (en) * 1948-10-09 1951-09-04 Ingersoll Rand Co Power-operated impact wrench
US2622465A (en) * 1949-09-01 1952-12-23 Crane Co Apparatus for stressing bolts and studs
US2654257A (en) * 1950-02-08 1953-10-06 United Shoe Machinery Corp Electrically powered blind riveting tool
US2621614A (en) * 1950-09-18 1952-12-16 Edgar A Walling Ice cream scoop
US2804778A (en) * 1952-08-26 1957-09-03 Wallace & Tiernan Company Inc Variable driving mechanism
US2703029A (en) * 1952-12-08 1955-03-01 Steukers Gilles Axial impact type percussive tool
US2998086A (en) * 1954-09-27 1961-08-29 Joseph Morris Reciprocating core drill
US2889711A (en) * 1955-08-22 1959-06-09 Morris Joseph Hammer
US3006202A (en) * 1958-03-17 1961-10-31 Samuel J Forbes Rotary and percussive tool
US2974535A (en) * 1958-09-08 1961-03-14 Morris Joseph Mechanical hammer
US3242764A (en) * 1964-04-23 1966-03-29 Gen Motors Corp Adjustable control mechanism
US3370655A (en) * 1965-03-03 1968-02-27 Dibotec A G Tools for driving anchor studs
US3661018A (en) * 1970-06-05 1972-05-09 Richard K Keefer Electric brusher
US3913685A (en) * 1974-02-06 1975-10-21 Illinois Tool Works Fastener driving tool
US3924692A (en) * 1974-02-06 1975-12-09 Illinois Tool Works Fastener driving tool
US4397055A (en) * 1980-10-20 1983-08-09 Cuchiara Samuel M Reversable shaft with rotary and selective oscillating motion
US5402604A (en) * 1993-03-17 1995-04-04 Ryobi Motor Products Oscillating spindle sander
US5558566A (en) * 1993-03-17 1996-09-24 Ryobi Motor Products Oscillating spindle sander
US5624302A (en) * 1993-03-17 1997-04-29 Ryobi Motor Products Corp. Oscillating spindle sander
US5860852A (en) * 1993-03-17 1999-01-19 Ryobi North America Inc. Oscillating spindle sander
US6102787A (en) * 1994-04-26 2000-08-15 Emerson Electric Co. Oscillating combination belt, spindle and edge sander
US6569002B2 (en) 1999-12-10 2003-05-27 Porter-Cable/Delta Hand-held oscillating spindle sander
US20130199072A1 (en) * 2012-02-02 2013-08-08 Kevin Richter Motorized firearm barrel cleaning system

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