US3913685A - Fastener driving tool - Google Patents

Fastener driving tool Download PDF

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Publication number
US3913685A
US3913685A US440223A US44022374A US3913685A US 3913685 A US3913685 A US 3913685A US 440223 A US440223 A US 440223A US 44022374 A US44022374 A US 44022374A US 3913685 A US3913685 A US 3913685A
Authority
US
United States
Prior art keywords
housing
ram
actuating means
cam
drive shaft
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
US440223A
Other languages
English (en)
Inventor
Robert Victor Enstrom
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to US440223A priority Critical patent/US3913685A/en
Priority to CA217,110A priority patent/CA1017903A/en
Priority to AU76934/74A priority patent/AU493500B2/en
Priority to DE19752501687 priority patent/DE2501687A1/de
Priority to JP50012650A priority patent/JPS50109572A/ja
Priority to IT19830/75A priority patent/IT1031356B/it
Priority to FR7503581A priority patent/FR2259675B3/fr
Priority to SE7501237A priority patent/SE7501237L/xx
Application granted granted Critical
Publication of US3913685A publication Critical patent/US3913685A/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
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power

Definitions

  • References Cited includes a coopIing allowi g the driving cam to accel- UNITED STATES PATENTS mate in rotanon as the drlven cam reaches the firing point. 1,755,565 4/l930 Shook 74/56 2,121,831 6/1938 Simmons 74/57 12 C 10 Drawing Figures US. Patent Oct. 21, 1975 SheetlofZ 3,913,685
  • Cartridge activated devices provide a high energy source for a single shot tool but suffer from certain disadvantages, such as the noise and disposal of cartridges.
  • the spring is periodically and selectively compressed and released through the use of coacting helicoidal cam elements, one of which elements is rotated about the axis of a ram and adapted to allow the ram to pass through upon release of the stored energy.
  • a second cam member is fixedly attached to the ram and restrained from rotary motion so that the rotation of the first helicoidal cam causes the ram to be foorced in an axial direction compressing the spring until the mating cam configuration allows the ram to be driven rapidly under the stored energy of the spring.
  • One aspect of the invention is the provision of a coupling device in the drive train between the electric motor and the rotatable cam so that the rotatable cam may be accelerated in rotation at the point when the tips of the helicoidal cam are coacting.
  • Devices of the type utilizing helicoidal cams tend to needlessly dissipate driving energy by attempting to force the driving cam out of contact since there will be a vector of force in the lateral direction as well as in an axial direction.
  • the tips of the cams cannot be accurately retained in a sharp point but will be somewhat rounded, thus, creating the condition where the ram starts to drive but is restrained from instantaneous reaction by the force vector in the lateral direction.
  • the invention provides a flexible mounting device between the driving housing and the electric motor casing to prohibit the shocks of either a free fire condition or a recoil from acting on the electric motor.
  • FIG. 1 is a perspective of the tool shown combining the electric motor casing with the driving housing.
  • FIG 2 is a side elevational view in partial section of the tool of the present invention.
  • FIG. 3 is an exploded perspective view of the coupling aspects of the invention.
  • FIG. 4 is a side view in partial section of the coupling device in the drive train of the invention.
  • FIG. 5 is a sectional view taken along the lines 55 of FIG. 4.
  • FIG. 6 is an enlarged sectional view of the impact driving means of the invention.
  • FIG. 7 is a view similar to FIG. 6 showing the impact driving means approaching the cocked position.
  • FIG. 8 is an enlarged view showing the coacting cam elements in a position immediately prior to the release of the spring force.
  • FIG. 9 is an enlarged view of the flexible coupling aspect of the invention in partial section.
  • FIG. 10 is a cross-sectional view taken alon lines 1010 of FIG. 2.
  • connection rods 36 which serve to clamp the entire housing together.
  • a driving apparatus is mounted within the housing 14 and includes a pair of coacting helicoidal cams l8 and 20.
  • the lower cam 20 will be rotatably mounted within the housing and serves as the driving cam.
  • the upper cam 18 will be nonrotatably mounted in the housing and serves as the driven cam which in turn compresses a compressible gas in chamber 16.
  • the cams are designed to have a generally helical path extending 360 about the axis of the cams and drop-off portions 19 and 21, which when axially aligned will permit the upper cam to be driven downwardly under the bias of the compressed gas.
  • the upper cam assembly 18 will include a ram 26 extending forwardly in the housing 14 and through a bore in the lower cam 20.
  • the upper cam will also include a guide shaft 22 extending coaxially with the ram for telescopic association with a sleeve 24 mounted in the rearmost portion of the cylinder 16.
  • a cup-like piston is integrally connected to the cam and the piston is sealed within the chamber with an appropriate sealing means, such as 42, mounted in the wall of the housing.
  • the upper cam assembly 18 is restrained from rotation by key and spline devices 30 and 32 so that rotation of the driving or actuating cam 20 will produce a purely axial rearwardly motion to the upper cam 18 and the 60 associated ram 26.
  • a resilient cushion ring 44 which may be mounted between a radially extending flange of the piston 40 and a shoulder formed in the frontmost extremity of the housing 14.
  • FIGS. 4 and the drive shaft 48 is shown to provide torque to the pinions 58 in the direction shown.
  • Upper and lower coupling portions 50 and 52 respectively, allow pinion 58 to accelerate or rotate faster relative to the drive shaft 48. This is accomplished by a slot 56 formed at the extremety of the upper coupling portion 50 and generally along the center line thereof.
  • the mating extremity of lower coupling portion 52 will include a pin 54 extending transversely of the axis thereof. The width of the slot 56 will be greater than, the diameter of the pin 54 thus allowing the lower portion to rotate a predetermined limited arc of rotation relative to the upper portion.
  • FIG. 5 is shown to provide torque to the pinions 58 in the direction shown.
  • Upper and lower coupling portions 50 and 52 respectively, allow pinion 58 to accelerate or rotate faster relative to the drive shaft 48. This is accomplished by a slot 56 formed at the extremety of the upper coupling portion 50 and generally along the center line thereof.
  • the mating extremity of lower coupling portion 52 will include a
  • the ram carrying cam is capable of quickly forcing the lower cam out of its driving path and allows the stored driving energy to be used almost entirely to drive an associated fastener.
  • the depth of the slot 56 is great enough to allow limited relative axial movement of the upper and lower coupling members as well as limited relative rotary motion.
  • FIG. 9 A flexible mounting device is provided which enables the motor housing and driver housing to move a limited axial distance relative to one another so that shocks imparted to the tool as a result of either free firing or actually impacting a to the tool as a result of either free firing or actually impacting a fastener with the resulting recoil forces will not be absorbed by the motor itself.
  • a shock connection 60 includes an upper cup member 62 fixedly attached to the motor housing 12 with a conventional bolt means 63.
  • a lower cup-like portion 66 is likewise fixedly attached to the driver housing 14. This attachment may be in the form of the connection rods 36.
  • Upper portion 62 will include a radially outwardly extending flange portion 64 spaced axially from the base portion which is attached to the housing'12.
  • the lower attachment portion66 will include radially inwardly extending flange portions 68 spaced axially from the point of attachment of the cup portion 66 with the housing 14.
  • the flange 68 will form an aperture of a size sufficient to allow the base and wall portions of the upper cup 62 to pass therethrough.
  • a T-shaped cushion ring 70 is positioned on the flange 64 so as to provide a cushioning means between flange 68 and flange 64 and absorb forces such as recoil forces.
  • a similar T-shaped resilient ring 72 is positioned on the lower surface of the flange 64 so as to be interposed .between the flange 64 and the housing 14 thus absorbing forces such as free firing forces from acting on theelectric motor.
  • Dowel pins 74 are provided to pass through the cup portions and the rings and serve as a means to locate the housing 14 on the electric motor housing 12.
  • the shock connection 60 in cooperation with the coupling 46 will enable the electric motor to be essentially protected from any shock forces that may arise 7 during the actuation of the ram 26, by allowing cushioned limited axial movement between the two housings.
  • a drive mechanism housing a ram mounted for monrotating axial movement in the housing, spring means in the housing adapted to urge the ram forwardly in the housing, ram actuating 7 means mounted for rotation about the axis of the ram, the ram and ram actuating means including first and second cam means respectively fixedly mounted thereto, each cam means including a rising surface and drop-off surface wherein rotation of the actuating means forces the ram rearwardly in the housing against the spring bias and then allows the ram to be driven forwardly under the spring bias, an electric motor means operatively connected to the housing and including a rotary drive shaft extending therefrom, a drive train connecting the drive shaft to the rotary actuating means, said motor means including a housing, the drive mechanism housing and the motor means housing being connected through a flexible joint, the joint including a first attachment member which is generally cup shaped and including a base, side walls and flange means extending radially from the side walls the base being secured to one of the
  • the resilient cushion means comprise a urethane ring with a generally T-shaped cross-sectional configuration.
  • a drive mechanism housing a ram mounted for nonrotating axial movement in the housing, spring means in the housing adapted to urge the ram forwardly in the housing, a ram actuating means mounted for rotation about the axis of the ram, the ram and ram actuating means including first and second cam means respectively fixedly mounted thereto, the ram actuating means including a ring gear fixedly attached thereto surrounding the axis of the cam means, each cam means including a rising surface and drop-off surface wherein rotation of the actuating means forces the ram rearwardly in the housing against the spring bias and then allows the ram to be driven forwardly under the spring bias, an electric motor means operatively connected to the housing and including a rotary drive shaft extending therefrom, a drive train connecting the drive shaft to the ram actuating means for providing rotary motion to the ram actuating means and second cam means, coupling means in the drive train for allowing the actuating means to accelerate in rotational movement relative to
  • a drive mechanism housing a ram mounted for nonrotating axial movement in the housing, spring means in the housing adapted to urge the ram forwardly in the housing, a ram actuating means mounted for rotation about the axis of the ram, the ram and ram actuating means including first and second cam means respectively fixedly mounted thereto, each cam means including a rising surface and drop-off surface wherein rotation of the actuating means forces the ram rearwardly in the housing against the spring bias and then allows the ram to be driven forwardly under the spring bias, an electric motor means operatively connected to the housing and including a rotary drive shaft extending therefrom, a drive train connecting the drive shaft to the ram actuating means for providing rotary motion to the ram actuating means and second cam means, the drive train comprising a pinion gear mounted on a shaft extending parallel to the axis of the ram to rotatively drive a ring gear means fixedly mounted to the ram actuating means,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US440223A 1974-02-06 1974-02-06 Fastener driving tool Expired - Lifetime US3913685A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US440223A US3913685A (en) 1974-02-06 1974-02-06 Fastener driving tool
CA217,110A CA1017903A (en) 1974-02-06 1974-12-30 Fastener driving tool
AU76934/74A AU493500B2 (en) 1974-02-06 1974-12-31 Fastener driving tool
DE19752501687 DE2501687A1 (de) 1974-02-06 1975-01-17 Setzgeraet
JP50012650A JPS50109572A (no) 1974-02-06 1975-01-31
IT19830/75A IT1031356B (it) 1974-02-06 1975-01-31 Utensile per conficcare elementi di fissaggio
FR7503581A FR2259675B3 (no) 1974-02-06 1975-02-05
SE7501237A SE7501237L (no) 1974-02-06 1975-02-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US440223A US3913685A (en) 1974-02-06 1974-02-06 Fastener driving tool

Publications (1)

Publication Number Publication Date
US3913685A true US3913685A (en) 1975-10-21

Family

ID=23747930

Family Applications (1)

Application Number Title Priority Date Filing Date
US440223A Expired - Lifetime US3913685A (en) 1974-02-06 1974-02-06 Fastener driving tool

Country Status (7)

Country Link
US (1) US3913685A (no)
JP (1) JPS50109572A (no)
CA (1) CA1017903A (no)
DE (1) DE2501687A1 (no)
FR (1) FR2259675B3 (no)
IT (1) IT1031356B (no)
SE (1) SE7501237L (no)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215808A (en) * 1978-12-22 1980-08-05 Sollberger Roger W Portable electric fastener driving apparatus
US4625903A (en) * 1984-07-03 1986-12-02 Sencorp Multiple impact fastener driving tool
CN102284943A (zh) * 2010-06-15 2011-12-21 喜利得股份公司 击入设备
US20120292064A1 (en) * 2011-05-19 2012-11-22 Hilti Aktiengesellschaft Fastener driving tool
CN105033951A (zh) * 2014-04-30 2015-11-11 阿罗紧固设备公司 紧固工具
US9205546B2 (en) 2010-06-15 2015-12-08 Hilti Aktiengesellschaft Driving device
US20170355069A1 (en) * 2016-06-08 2017-12-14 Tti (Macao Commercial Offshore) Limited Gas spring fastener driver
US10478954B2 (en) 2007-10-05 2019-11-19 Senco Brands, Inc. Fastener driving tool using a gas spring
US10821585B2 (en) 2016-12-22 2020-11-03 Kyocera Senco Industrial Tools, Inc. Fastener driving tool with driver position sensors
US11904446B2 (en) 2020-05-07 2024-02-20 Kyocera Senco Industrial Tools, Inc. Power driving tool with latch position sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017064832A (ja) * 2015-09-29 2017-04-06 日立工機株式会社 打込機

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1755565A (en) * 1926-10-20 1930-04-22 Lawrence G Shook Electric hammer
US2121831A (en) * 1936-09-04 1938-06-28 Ruth D Simmons Tool-actuating apparatus
US2484471A (en) * 1947-12-26 1949-10-11 Charles A Shinn Hammer drill
US2818743A (en) * 1954-05-10 1958-01-07 Reeves Instrument Corp Motion transforming apparatus
US3583498A (en) * 1970-02-13 1971-06-08 Ceg Corp Impact hammer
US3652074A (en) * 1970-06-26 1972-03-28 Mcculloch Corp Mounting means for isolating vibrational energy in chain saw machines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1755565A (en) * 1926-10-20 1930-04-22 Lawrence G Shook Electric hammer
US2121831A (en) * 1936-09-04 1938-06-28 Ruth D Simmons Tool-actuating apparatus
US2484471A (en) * 1947-12-26 1949-10-11 Charles A Shinn Hammer drill
US2818743A (en) * 1954-05-10 1958-01-07 Reeves Instrument Corp Motion transforming apparatus
US3583498A (en) * 1970-02-13 1971-06-08 Ceg Corp Impact hammer
US3652074A (en) * 1970-06-26 1972-03-28 Mcculloch Corp Mounting means for isolating vibrational energy in chain saw machines

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215808A (en) * 1978-12-22 1980-08-05 Sollberger Roger W Portable electric fastener driving apparatus
US4625903A (en) * 1984-07-03 1986-12-02 Sencorp Multiple impact fastener driving tool
AU588244B2 (en) * 1984-07-03 1989-09-14 Sencorp Multiple impact fastener driving tool
US10478954B2 (en) 2007-10-05 2019-11-19 Senco Brands, Inc. Fastener driving tool using a gas spring
US11845167B2 (en) 2007-10-05 2023-12-19 Kyocera Senco Industrial Tools, Inc. Fastener driving tool using a gas spring
US11241776B2 (en) 2007-10-05 2022-02-08 Kyocera Senco Industrial Tools, Inc. Fastener driving tool using a gas spring
US11034007B2 (en) 2007-10-05 2021-06-15 Kyocera Senco Industrial Tools, Inc. Fastener driving tool using a gas spring
CN102284943A (zh) * 2010-06-15 2011-12-21 喜利得股份公司 击入设备
EP2397268A3 (de) * 2010-06-15 2013-09-04 HILTI Aktiengesellschaft Eintreibvorrichtung
US8807413B2 (en) 2010-06-15 2014-08-19 Hilti Aktiengesellschaft Driving device
US9205546B2 (en) 2010-06-15 2015-12-08 Hilti Aktiengesellschaft Driving device
US20160368127A1 (en) * 2011-05-19 2016-12-22 Hilti Aktiengesellschaft Fastener driving tool
US9776312B2 (en) * 2011-05-19 2017-10-03 Hilti Aktiengesellschaft Fastener driving tool
US9463561B2 (en) * 2011-05-19 2016-10-11 Hilti Aktiengesellschaft Fastener driving tool
US20120292064A1 (en) * 2011-05-19 2012-11-22 Hilti Aktiengesellschaft Fastener driving tool
CN105033951B (zh) * 2014-04-30 2019-12-10 阿罗紧固设备公司 紧固工具
CN105033951A (zh) * 2014-04-30 2015-11-11 阿罗紧固设备公司 紧固工具
US20170355069A1 (en) * 2016-06-08 2017-12-14 Tti (Macao Commercial Offshore) Limited Gas spring fastener driver
US10695899B2 (en) * 2016-06-08 2020-06-30 Tti (Macao Commercial Offshore) Limited Gas spring fastener driver
US10821585B2 (en) 2016-12-22 2020-11-03 Kyocera Senco Industrial Tools, Inc. Fastener driving tool with driver position sensors
US11731254B2 (en) 2016-12-22 2023-08-22 Kyocera Senco Industrial Tools, Inc. Fastener driving tool with driver position sensors
US11904446B2 (en) 2020-05-07 2024-02-20 Kyocera Senco Industrial Tools, Inc. Power driving tool with latch position sensor

Also Published As

Publication number Publication date
AU7693474A (en) 1976-07-01
FR2259675B3 (no) 1977-10-21
SE7501237L (no) 1975-08-07
IT1031356B (it) 1979-04-30
CA1017903A (en) 1977-09-27
DE2501687A1 (de) 1975-08-14
FR2259675A1 (no) 1975-08-29
JPS50109572A (no) 1975-08-28

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