US3270596A - Offset drive attachment for tools having rotary driving members - Google Patents

Offset drive attachment for tools having rotary driving members Download PDF

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Publication number
US3270596A
US3270596A US346773A US34677364A US3270596A US 3270596 A US3270596 A US 3270596A US 346773 A US346773 A US 346773A US 34677364 A US34677364 A US 34677364A US 3270596 A US3270596 A US 3270596A
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US
United States
Prior art keywords
ratchet wheel
attachment
rotation
tool
driven member
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
US346773A
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English (en)
Inventor
Emery L Hall
Richard H Kocian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skil Corp
Original Assignee
Skil Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to BE657351D priority Critical patent/BE657351A/xx
Application filed by Skil Corp filed Critical Skil Corp
Priority to US346773A priority patent/US3270596A/en
Priority to GB50960/64A priority patent/GB1068240A/en
Priority to NL6415145A priority patent/NL6415145A/xx
Priority to DE19651503064 priority patent/DE1503064A1/de
Application granted granted Critical
Publication of US3270596A publication Critical patent/US3270596A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • 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
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1503—Rotary to intermittent unidirectional motion
    • Y10T74/1508—Rotary crank or eccentric drive

Definitions

  • This invention relates generally to attachments for tools having rotary driving members, and more particularly to a new and improved attachment of the type which permits running a fastener from such a tool with the latter in offset relation from the fastener.
  • the present invention concerns an attachment primarily although not exclusively intended for use with portable power tools of the type having rotary driving members, such as an impact wrench, for example. It is desirable to use such a tool in running fasteners used in the construction of modern day automotive vehicles, for example. Often fasteners in these vehicles are in such confined locations they are inaccessible to impact wrenches and the like because of the bulk of the latter.
  • an offset drive attachment including an elongated body rotatably mounting an input or driven member and a driving or output member at its respective opposite ends for rotation about parallel axes.
  • the driven member includes a cam surface in driving engagement with an arm which extends generally lengthwise of the elongated body. This arm acts as a drive pawl and engages ratchet teeth on the output member.
  • the body also includes a stop pawl in engagement with the rantchet teeth thereby to provide unidirectional rotation of the output member upon oscillation of the drive pawl, which oscillation is brought about by rotation of the driven member.
  • the offset drive attachment also includes unique means adapted to cooperate with means on the nose of an associated power tool thereby to permit the power tool and the offset attachment to be handled and operated together as a unit.
  • Yet another object of the invention is the provision of an attachment of the type described for use with a tool having a rotary driving member, wherein the attachment is provided with means adapted to cooperate with complementary means on the tool to prevent relative movement between the attachment and the tool.
  • Still another object of the instant invention is to provide, in combination, an attachment of the type described and a tool having a nose portion adapted to cooperate with complementary means on the attachment thereby to prevent relative rotation between the tool and the attachment.
  • FIG. 1 is a side elevational view of one form of the offset drive attachment of this invention with certain portions being broken away and/ or shown in section for better illustration of the invention;
  • FIG. 2 is a section taken along line 2-2 of FIG. 1;
  • FIG. 3 is a fragmentary section taken along line 33 of FIG. 1;
  • FIG. 4 is an elevational view of the tool attachment and a power tool showing the latter about to be engaged with the driven member of the offset attachment;
  • FIG. 5 is an elevational view showing the attachment in driven engagement with the tool of FIG. 4, with certain parts of the latter being broken away and shown in section for better illustration of the engagement between the power tool and the attachment.
  • the offset drive attachment of this invention includes a pair of identical elongated plates 10 and 12 held in parallel spaced relation by a number of sleeve-like spacers 14-16 and respective fasteners 1820 which extend through the openings in the spacers and are engaged with the plates. Plates 10 and 12 define the body of the attachment.
  • a driven member 22 includes a pair of cylindrical bearing surfaces 24 and 26 journaled in respective openings 27 and 28 in the plates 10 and 12.
  • Driven member 22 also includes a pair of integral, oppositely extending hexagonal portions 29 and 30, each of which portions is adapted to be non-rotatably received in a complementary shaped driving socket in a tool rotary driving member as will be explained below.
  • driven member 22 includes a central cylindrical portion 32 which has its central axis offset or eccentric with the axis of rotation of member 22 for acting as a cam. Suitable raised annular bearing areas are formed at the juncture of driven member portion 32 and bearing surfaces 24, 26, which bearing areas engage confronting surfaces of plates 10 and 12 around openings 27 and 28 to maintain cyindrical portion 32 in spaced relation from plates 10 and 12 and to secure the driven member against axial movement in the attachment.
  • An arm 34 is slidably supported between plates 10 and 12, which arm has an enlarged end portion including a cylindrical opening 35 in which is secured an annular bearing member 36.
  • Bearing member 36 snugly but rotatably receives cam portion 32 of driven member 22. It will be apparent that by reason of the eccentric disposition of cam 32, rotation of driven member 22 will result in movement of arms 34 in a generally reciprocal or oscillating manner.
  • the end of arm 34 remote from the end thereof engaged with driven member 22 is in the form of a drive or thrust pawl 38.
  • a ratchet wheel or fastener driving member is rotatably mounted in the end of the drive attachment opposite the end thereof supporting driven member 22; ratchet wheel 40 is mounted for rotation about an axis parallel with the axis of rotation of driven member 22.
  • ratchet wheel 40 includes identical spaced cylindrical portions 41 and 42 rotatably received with respective openings 43 and 44 in plates 10 and 12.
  • Ratchet wheel 40 includes an annular series of ratchet teeth 45 which lie between plates 10 and 12. Ratchet teeth 45 are adapted to be engaged by drive pawl 38 as best seen in FIG. 2 so as to result in clockwise rotation (FIG.
  • Ratchet wheel 40 upon oscillation of the drive pawl, the teeth being adapted to permit overrunning of the drive pawl as the latter is retracted.
  • Ratchet wheel 40 includes a central axially extending, hexagonal shaped opening 46 adapted to receive a complementary shaped fastener or adapter for driving the same.
  • a stop pawl 48 is disposed between plates and 12 and includes a cylindrical opening 49 at its approximate midpoint, which opening rotat-ably engages spacer sleeve 14. Accordingly, stop pawl 48 is mounted between plates 14 and 12 for rocking or swinging movement about spacer 14. Pawl 48 has one end thereof in the form of a right angle dog 50 adapted to engage ratchet teeth 45 so as to prevent rotation of ratchet wheel 40 in a counterclockwise direction as seen in FIG. 2 and permit rotation of the latter in the opposite direction.
  • a spring 52 has one end thereof engaged in a suitable aperture in pawl 48 adjacent the dog thereof, and the other end of spring 52 is engaged in a suitable aperture in arm 34 adjacent the end thereof defining pawl 38. Manifestly, spring 52 maintains drive pawl 38 and stop pawl 48 in engagement with the ratchet teeth of the ratchet wheel 40.
  • Stop pawl 48 is rounded as at 54.
  • Stop pawl 48 includes an integral knob or projection 55 on a side edge thereof adjacent rounded end 54.
  • Knob 55 serves as a means to engage one end of a tool, such as a screw driver,
  • a pair of adapter plates 58 and 59 are secured to outside faces of respective plates 10 and 12 adjacent the ends of the latter mounting driven member 22.
  • adapter plates 58 and 59 are similar in construction, only one plate 58, best illustrated in FIGS. 3 and 4, will be described in detail.
  • Plate 58 is secured to plate 10 by fasteners 19 and 20 and an additional fastener 61.
  • Fastener 61 extends only through plates 10 and 58 and is flush with the inside face of the former so as not to interfere with movement of arm 34.
  • Plate 58 includes an opening 62 and three raised areas or portions 63, 64 and 65.
  • Plate 58 includes integral, inwardly extending lugs or projections 67, 68, 69 at respective raised portions 63, 64 and 65. By reason of the raised portions of plate 58, lugs 6769 are disposed in parallel and spaced relation from the outer face of plate 10. The purpose and function of these lugs will be explained hereinbelow.
  • Tool 72 which is of the rotary impact type, includes a motor-handle portion '73 containing a suitable motor, such a pneumatic motor, operated by a trigger lever 74.
  • the tool includes an impact clutch portion 75 enclosing a suitable impact clutch mechanism for delivering a series of rotary impact blows to a rotary driving member 76.
  • one end of driving member 76 is journaled in a sleeve-like bearing 77 suitably supported in the nose of portion 75 of the tool.
  • Rotary driving member 76 includes a hexagonal shaped socket 79 in the end thereof adjacent the nose of the tool for nonrotatably receiving one of the complementary shaped hexagonal portions 29, 30 of driven member 22 of the offset drive attachment.
  • the end of housing portion 75 defining the nose of tool 72 is provided with a plurality of axially extending recesses or grooves 80 to adapt the tool for engagement with the drive attachment.
  • Recesses 88 are equally spaced around the circumference of the nose of the tool and open into the front face of tool 72, i.e. the annular portion thereof surrounding rotary driving member 76.
  • the bases of recesses 80 curve upwardly and join the outer surface of housing portion 75.
  • the spacing of drive attachment lugs 67-69 is correlated .with the spacing of recesses so that when one of the hexagonal portions 29 or 30 of drive attachment driven member 22 is received in complementary shaped socket 79 of tool driving member 76, the lugs engage a set of three of recesses 80.
  • This engagement between the lugs on the drive attachment and the recesses on the tool prevents swinging or rotation of the drive attachment relative to the tool about the axis of rotation defined by driven member 22 and driving member 76.
  • the drive attachment may be fixed to the tool in the manner just described in a number of different angular positions about the axis of rotation of members 22 and 76.
  • the operation of the offset drive attachment of this invention should be apparent from the above description.
  • the attachment is detachably connected with tool 72 in the manner just described so that upon actuation of tool 72 driven member 22 is rotated thereby providing rotation of ratchet wheel 46 (in a clockwise direction as seen in FIG. 2) when hexagonal portion 29 of driven member 22 is engaged with socket 79 of tool driving member 76.
  • ratchet wheel 40 will be driven in a clockwise direction, as seen in FIG. 2, regardless of the direction of rotation of driven member 22.
  • the offset attachment of this invention is designed to be turned over so that hexagonal portion 30 of driven member 22 is driven by the tool driving member thereby to change the direction of rotation of ratchet wheel 40 relative to a fastener.
  • plates 10 and 12 are provided with indicia (not shown) on their exterior surfaces adjacent ratchet wheel 42 indicate the direction of rotation of the latter.
  • indicia not shown
  • plates 10 and 12 are provided with indicia (not shown) on their exterior surfaces adjacent ratchet wheel 42 indicate the direction of rotation of the latter.
  • Retaining rings 29a, 30a selectively engage the walls of socket 79 of tool driving member 76 so that the offset drive attachment is detachably retained to tool 72.
  • the interengagement between the lugs on the adapter plate of the attachment with the recesses of the nose of the tool prevents rotation of the drive attachment relative to the tool. Accordingly, when the offset drive attachment is connected to power tool 72, the latter maybe manipulated by one hand for maneuvering the drive attachment into a confined location so as to reach a fastener and engage the same in hexagonal opening 46 or in an adapter driven by the latter.
  • the pawls of the drive attachment of this invention may be separated from the teeth of the ratchet wheel for freeing the latter by inserting a screw driver or the like between plates 10 and 12 and into engagement with the end of the stop pawl including knob or projection 55.
  • a screw driver between plates 10 and 12 in this manner causes stop pawl 48 to rock (in a clockwise direction as seen in FIG. 2) thereby freeing dog 50 from ratchet teeth 45 and causing rounded end 54 of the stop pawl to engage arm 34 thereby to free drive pawl 38 from the ratchet teeth.
  • Knob or projection 55 on the stop pawl prevents the tip of a screw driver or the like from slipping along the side edge of the stop pawl.
  • the offset drive attachment of this invention is well suited for use with a power tool of the rotary impact type which delivers in rapid succession a series of rotational impact blows.
  • the offset drive attachment efficiently transfers impact blows from such a power tool to a fastener since there is little if any energy absorbing slop or backlash movement in the ratchet and pawl drive of the attachment as is true in some forms of drive attachments.
  • An offset drive attachment for a tool of the type having a rotary driving member comprising, an elongated body, a driven member rotatably mounted in one end of the body and adapted to be driven by said driving member, said driven member in cluding a cam surface eccentric with respect to the axis of rotation of the driven member, an arm carried by said body for movement in a plane perpendicular to said axis, said arm having drive pawl means associated with one end thereof and having the other end thereof engaged with said cam surface so that rotation of said driven member brings about oscillating movement of the drive pawl means, a ratchet wheel adapted to engage a rotary member for driving the same, which ratchet wheel is rotatably mounted in the other end of said body and has teeth engaged by said pawl means, stop pawl means carried by the body and engaged with the ratchet wheel teeth to prevent rotation of the ratchet wheel in one direction, and means carried by the body for holding said drive pawl means in engagement with the teeth
  • An offset drive attachment for a tool of the type having a rotary driving member comprising, an elongated body, a driven member rotatably mounted at one end of the body and adapted to be driven by said driving member, which driven member includes a cylindrical cam surface eccentric with respect to the axis of rotation of the former, an arm carried by said body for movement in a plane perpendicular to said axis, said arm having a circular opening in one end thereof rotatably receiving said cam surface and said arm having the other end thereof in the form of a drive pawl, a ratchet wheel adapted to engage a rotary member for driving the same, which ratchet wheel is rotatably mounted to the other end of said body and has its teeth engaged by said drive pawl, stop pawl means carried by the body and engaged with the ratchet wheel teeth to prevent rotation of the ratchet wheel in one direction, and resilient means carried by the body for holding said drive pawl in engagement with the teeth on the ratchet wheel so that upon
  • An offset drive attachment for a tool of the type having a rotary driving member comprising, an elongated body consisting of two plates closely secured together in parallel spaced relation, a driven member rotatably mounted in one end of the body and adapted to be driven by said driving member about an axis perpendicular to said plates, which driven member includes a cylindrical cam surface eccentric with respect to said axis and disposed between said plates, an arm slidable between said plates and having a circular opening in one end thereof rotatably receiving said cam surface, said arm having the other end thereof in the form of a drive pawl, a ratchet wheel adapted to engage a rotary member for driving the same, which ratchet wheel is rotatably mounted in the other end of said body for rotation about an axis parallel with said axis, said ratchet wheel having the teeth thereof disposed between said plates and engaged by said drive pawl, stop pawl means carried between said plates and engaged with the ratchet wheel teeth to prevent rotation of the
  • An oifset drive attachment of the type having a rotary drivin-g member comprising, an elongated body consisting of two plates closely secured together in parallel spaced relation, a driven member rotatably mounted in one end of the body and adapted to be driven by said rotary driving member about an axis perpendicular to said plates, which driven member includes a cylindrical cam surface eccentric with respect to said axis and disposed between said plates, an arm slidable between said plates and having a circular opening in one end thereof rotatably receiving said cam surface, said arm having the other end thereof in the form of a drive pawl, a ratchet wheel adapted to engage a rotary member for driving the same, which ratchet wheel is rotatably mounted in the other end of said body for rotation about an axis parallel with said axis, said ratchet wheel having the teeth thereof disposed between said plate and engaged by said drive pawl, a stop pawl disposed between said plates and extending in general parallel relation
  • a tool having a non-rotatable housing nose supporting a rotary driving member, which nose is provided with at least one recess in the exterior thereof, a drive attachment detachably engaged with said tool for transmitting rotation from said rotary driving member to rotary fastening means wherein the axis of rotation of the latter is parallel and substantially spaced from the axis of rotation of the former, said attachment including an elongated body supporting a driven member and a fastener driving member at its respective opposite ends for rotation about spaced parallel axes, said driven mem ber being detachably connected with said rotary driving member for being driven by the latter and said fastener driving member being adapted for driving engagement with rotary fastening means, drive means carried by said body for transmitting rotation of said driven member to said fastener driving member, and at least one lug on 7 said body in engagement with said recess for preventing rotation of the attachment relative to the tool about the rotational axis of the rotary driving member, whereby said tool and said attachment may be handled and
  • a tool having a housing nose supporting a rotary driving member, which nose is provided with at least one recess in the exterior thereof, a drive attachment detachably engaged with said tool for trans mitting rotation from said rotary driving member to rotary fastening means wherein the axis of rotation of the latter is parallel and substantially spaced from the axis of rotation of the former, said attachment including an elongated body, a driven member rotatably mounted in one end of the body and detachably engaged with said rotary driving member for being driven by the latter, said driven member including a cam surface eccentric with respect to the axis of rotation of the driven member, an arm carried by said body for movement in a plane perpendicular to said axis, said arm having drive pawl means associated with one end thereof and having the other end thereof engaged with said cam surface so that rotation of said driven member brings about oscillating movement of the drive pawl means, a ratchet wheel adapted to engage 25 means carried by the body and engaged with the ratchet wheel teeth
  • said housing nose includes a plurality of said recesses in a circumferentially spaced pattern and wherein said attachment includes a corresponding number of said lugs in a complementary pattern and in snug frictional engagement in respective recesses.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
US346773A 1964-02-24 1964-02-24 Offset drive attachment for tools having rotary driving members Expired - Lifetime US3270596A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE657351D BE657351A (no) 1964-02-24
US346773A US3270596A (en) 1964-02-24 1964-02-24 Offset drive attachment for tools having rotary driving members
GB50960/64A GB1068240A (en) 1964-02-24 1964-12-15 Drive attachment for screwing up and unscrewing fasteners
NL6415145A NL6415145A (no) 1964-02-24 1964-12-29
DE19651503064 DE1503064A1 (de) 1964-02-24 1965-02-24 Winkelantrieb fuer Drehwerkzeuge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US346773A US3270596A (en) 1964-02-24 1964-02-24 Offset drive attachment for tools having rotary driving members

Publications (1)

Publication Number Publication Date
US3270596A true US3270596A (en) 1966-09-06

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ID=23360989

Family Applications (1)

Application Number Title Priority Date Filing Date
US346773A Expired - Lifetime US3270596A (en) 1964-02-24 1964-02-24 Offset drive attachment for tools having rotary driving members

Country Status (5)

Country Link
US (1) US3270596A (no)
BE (1) BE657351A (no)
DE (1) DE1503064A1 (no)
GB (1) GB1068240A (no)
NL (1) NL6415145A (no)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031785A (en) * 1975-09-02 1977-06-28 Wheeler Charles J Squeeze actuated wrench
US4304157A (en) * 1980-02-01 1981-12-08 Keiichi Yamada Torque wrench
US20140366689A1 (en) * 2011-08-26 2014-12-18 Calvin A Bonas Apparatus for tightening threaded fasteners

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719893A1 (de) * 1987-06-13 1988-12-29 Wagner Paul Heinz Hydraulischer kraftschrauber

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600177A (en) * 1949-07-14 1952-06-10 Sweeney Mfg Co B K Socket wrench extension
US2672065A (en) * 1952-10-23 1954-03-16 Frank T Danuskie Chain socket wrench
US2817256A (en) * 1956-07-27 1957-12-24 Malone Samuel Lee Pancake type flexible drive socket wrench
US3041902A (en) * 1957-05-27 1962-07-03 Hi Shear Rivet Tool Company Motor operated hand tool for setting fasteners
US3191465A (en) * 1963-12-26 1965-06-29 Ingersoll Rand Co Ratchet device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600177A (en) * 1949-07-14 1952-06-10 Sweeney Mfg Co B K Socket wrench extension
US2672065A (en) * 1952-10-23 1954-03-16 Frank T Danuskie Chain socket wrench
US2817256A (en) * 1956-07-27 1957-12-24 Malone Samuel Lee Pancake type flexible drive socket wrench
US3041902A (en) * 1957-05-27 1962-07-03 Hi Shear Rivet Tool Company Motor operated hand tool for setting fasteners
US3191465A (en) * 1963-12-26 1965-06-29 Ingersoll Rand Co Ratchet device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031785A (en) * 1975-09-02 1977-06-28 Wheeler Charles J Squeeze actuated wrench
US4304157A (en) * 1980-02-01 1981-12-08 Keiichi Yamada Torque wrench
US20140366689A1 (en) * 2011-08-26 2014-12-18 Calvin A Bonas Apparatus for tightening threaded fasteners
US9492913B2 (en) * 2011-08-26 2016-11-15 HYTORC Division Unex Corporation Apparatus for tightening threaded fasteners

Also Published As

Publication number Publication date
DE1503064A1 (de) 1969-10-30
NL6415145A (no) 1965-08-25
BE657351A (no)
GB1068240A (en) 1967-05-10

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