US20150107421A1 - Quadrilobe connector for transmitting torque - Google Patents
Quadrilobe connector for transmitting torque Download PDFInfo
- Publication number
- US20150107421A1 US20150107421A1 US14/514,442 US201414514442A US2015107421A1 US 20150107421 A1 US20150107421 A1 US 20150107421A1 US 201414514442 A US201414514442 A US 201414514442A US 2015107421 A1 US2015107421 A1 US 2015107421A1
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- US
- United States
- Prior art keywords
- quadrilobe
- connector
- generating device
- torque generating
- male
- 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.)
- Abandoned
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- 230000004913 activation Effects 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 21
- 239000012636 effector Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Images
Classifications
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- 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
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/0078—Reaction arms
-
- 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
-
- 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
- B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston
-
- 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
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/0007—Connections or joints between tool parts
- B25B23/0035—Connection means between socket or screwdriver bit and tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
- B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
- B25F5/028—Construction of casings, bodies or handles with torque reaction bars for rotary tools to be supported by a fixed object
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
-
- 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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/34—Toothed gearings for conveying rotary motion with gears having orbital motion involving gears essentially having intermeshing elements other than involute or cycloidal teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
-
- 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
- B25B13/00—Spanners; Wrenches
- B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
- B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
- B25B13/466—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in an axial direction
-
- 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
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
- B25B15/04—Screwdrivers operated by rotating the handle with ratchet action
-
- 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
-
- 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
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
- B25B21/023—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket for imparting an axial impact, e.g. for self-tapping screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/10—Details of socket shapes
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D1/101—Quick-acting couplings in which the parts are connected by simply bringing them together axially without axial retaining means rotating with the coupling
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
-
- 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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H2001/289—Toothed gearings for conveying rotary motion with gears having orbital motion comprising two or more coaxial and identical sets of orbital gears, e.g. for distributing torque between the coaxial sets
Definitions
- torque generated by various tools is transferred to an end effector by a feature that has a square cross section, such as a connector having a square cross section.
- a feature that has a square cross section such as a connector having a square cross section.
- transferring torque through the square feature creates high stress in the corners of the square, which are weak points in the design of such devices.
- manufacturing the male and, more so, the female part of the square feature requires specialized machinery.
- the square drive with a spring loaded pin or ball to retain the end effector is only reliably usable with light weight effectors such as small sockets. While, the square drive feature with a retainer pin and elastomeric ring can hold heavy end effectors, those effectors have loose parts which are easily lost and require many steps to install.
- U.S. Pat. No. 7,225,710 to Pacheco, Jr. discloses a lobed fastener with six lobes.
- the lobes are curvilinear having depressions which are joined from two arcs extending from corners of a hexagonal structure. The length of each lobe and each depression is unequal.
- U.S. Pat. No. 8,347,761 to Goss discloses a socket with six rounded lobes, wherein the corners of a hexagon are replaced with an arc of a circle. The ends of two adjacent arcs do not seem to meet to form a depression between the arcs.
- U.S. Patent Publication 2012/0165107 to Guo et al. discloses a plurality of engaging teeth formed on an inner peripheral wall of an engaging hole.
- six rounded lobes are spaced there-around a male connector.
- the female connector has rounded lobes.
- the corners of a hexagon are replaced with an arc of a circle and ends of two adjacent arcs do not seem to meet to form a depression between the arcs.
- the disclosed technology described herein addresses a need, unfulfilled in the prior art, for providing a connector for a torque generating device which is not rapidly worn or sheared by stress resulting from the generated torque being transferred through the connector, and a torque generating device using such a connector.
- a quadrilobe connector including a male connector portion including a quadrilobe shaped protrusion and a female connector portion including a quadrilobe shaped socket, corresponding in shape to the quadrilobe shaped protrusion and configured to receive the quadrilobe shaped protrusion for connection thereof, wherein the quadrilobe shape is defined by a cross-sectional shape derived from a square, such that each corner of the square is replaced with an arc of a circle, the arc defining a lobe of the quadrilobe shape, ends of each two adjacent the arcs meet to form a depression between the adjacent arcs, and each of the arcs is equal in radius and intersects tangentially to each other the arc.
- a radius of each the lobe and of each the depression is equal.
- each arc is defined by a circle having a first radius
- each depression is defined by an arc of a circle having a second radius.
- the first radius is equal to the second radius.
- the male connector portion is mounted on an output shaft of a torque generating device, and forms a drive connector for the device.
- the female connector portion comprises a socket disposed in a replaceable piece removably and replaceably connectable to the torque generating device.
- the female connector portion comprises a socked disposed within an output shaft of a torque generating device, and forms a drive connector for the device.
- the male connector portion protrudes out of a replaceable piece removably and replaceably connectable to the torque generating device.
- engagement of the quadrilobe protrusion of the male connector portion in the quadrilobe socket of the female connector portion during activation of a torque generating device results in distribution of the torque generated by the device on wall portions defined by the arcs and the depressions, thereby reducing stress caused by the generated torque on the torque generating device.
- a torque generating device including a body portion adapted to be held by a user during operation of the device and a quadrilobe connector mounted on the body portion, the quadrilobe connector having a geometrical shape defined by a cross-sectional shape derived from a square, such that each corner of the square is replaced with an arc of a circle, the arc defining a lobe of the quadrilobe shape, ends of each two adjacent the arcs meet to form a depression between the adjacent arcs, and each of the arcs is equal in radius and intersects tangentially to each other the arc.
- the quadrilobe connector comprises a male quadrilobe connector portion mounted on and protruding from an output shaft functionally associated with the body portion.
- the device further includes a replaceable piece removably and replaceably connectable to the torque generating device via the quadrilobe connector, the replaceable piece comprising a female quadrilobe connector portion forming a socket disposed therein, the socket corresponding in shape to the quadrilobe protrusion of the male quadrilobe connector portion and configured to receive the male quadrilobe connector portion for connection of the replaceable piece to the body portion.
- the quadrilobe connector comprises a female quadrilobe connector socket portion disposed within an output shaft functionally associated with the body portion.
- the device further includes a replaceable piece removably and replaceably connectable to the torque generating device via the quadrilobe connector, the replaceable piece comprising a male quadrilobe connector portion protruding therefrom, the protrusion corresponding in shape to the quadrilobe socket of the female quadrilobe connector portion and configured to be received therein for connection of the replaceable piece to the body portion.
- the torque generating device comprises a hydraulic torque wrench or a pneumatic torque wrench or an electric torque wrench.
- FIG. 1 shows a perspective view of a square male drive connector and a corresponding square female socket connector of the prior art.
- FIG. 2 shows a perspective view of a square male drive connector forming part of a torque generating device and a corresponding square female socket connector of the prior art.
- FIG. 3 shows a perspective view of a quadrilobe male drive connector and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology.
- FIG. 4 shows front plan view and side elevation view of the quadrilobe male drive connector of FIG. 3 .
- FIG. 5 shows a perspective view of a quadrilobe male drive connector forming part of a torque generating device and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology.
- FIG. 6 shows a perspective view of a quadrilobe female drive connector and a corresponding quadrilobe male connector of embodiments of the disclosed technology.
- FIG. 7 shows a perspective view of a quadrilobe female drive connector forming part of a torque generating device and a corresponding quadrilobe male connector of embodiments of the disclosed technology.
- FIGS. 8A to 8E are schematic illustrations of geometrical progression of generating a quadrilobe shape as used in the disclosed technology.
- the presently disclosed technology is directed towards a quadrilobe socket connector designed to lower the stress level on the walls of male and female connecting socket devices when they are engaged.
- the quadrilobe shape allows the socket to transfer more torque, be more durable, and be procured less expensively than the prior art versions as standardized machinery may be used in the manufacture of same.
- FIG. 1 shows a perspective view of a square male drive connector of the prior art, and of a corresponding female socket connector of the prior art.
- the body 100 of a torque generating device comprises an output shaft 102 , having protruding therefrom a square male drive connector 104 .
- An attachment 106 designed to connect to the torque generating device includes a square female socket connector 108 corresponding in shape to drive connector 104 and designed to receive drive connector 104 for connection therewith.
- FIG. 2 shows a perspective view of a square male drive connector of the prior art forming part of a torque generating device, and a corresponding square female socket connector of the prior art.
- a torque generating device 110 here illustrated as a torque wrench, includes a body 100 including an output shaft 102 and a square male drive connector 104 , as shown in FIG. 1 , as well as additional typical portions such as a grip 112 , an activation button 114 , and the like.
- An attachment 106 as shown in FIG. 1 includes square female socket connector 108 corresponding in shape to drive connector 104 and designed to receive the drive connector 104 for connection therewith.
- attachment 106 may form part of a larger tool (not shown).
- the torque generated by the device transfers through the square male drive connector 104 , causing high stress levels on the corners of the square shape male drive connector 104 and of the corresponding square female socket connector 108 and leading to excessive wear and premature failure of the device 110 .
- FIG. 3 shows a perspective view of a quadrilobe male drive connector and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology.
- FIG. 4 shows front plan view and side elevation view of the quadrilobe male drive connector of FIG. 3 .
- a body 200 of a torque generating device comprises an output shaft 202 , having protruding therefrom a quadrilobe male drive connector 204 .
- An attachment 206 designed to connect to the torque generating device includes a quadrilobe female socket connector 208 corresponding in shape to drive connector 204 and designed to receive drive connector 204 for connection therewith.
- a front end 205 of male drive connector 204 contacts an inner surface of the female socket connector 208 .
- the quadrilobe shape of drive connector 204 and of corresponding socket connector 208 is defined as having a cross-sectional shape derived from a square, whereby each of the corners of the square is replaced with an arc 210 of a circle, whereby ends of two adjacent arcs meet to form a depression 212 between the arcs.
- each of the four arcs 210 is equal in radius and intersects tangentially to each other arc 210 .
- the radius of each lobe, and each depression 212 is equal.
- a square connector with rounded corners may be used.
- more than four lobes may be used, such as five or six lobes.
- the front plan view shows the four depressions 212 between the arcs on the front end 205 of the male drive connector 204 .
- the side elevation view shows a view of a depression 212 between the arcs 210 of the male drive connector 204 , from the side.
- FIG. 5 shows a quadrilobe male drive connector of embodiments of the disclosed technology forming part of a torque generating device and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology.
- a torque generating device 220 here illustrated as a torque wrench, includes a body 200 including an output shaft 202 and a quadrilobe male drive connector 204 , as shown in FIG. 3 , as well as additional typical portions such as a grip 222 , an activation button 224 , and the like.
- An attachment 206 as shown in FIG. 3 includes quadrilobe female socket connector 208 corresponding in shape to drive connector 204 and designed to receive the drive connector 204 for connection therewith.
- the quadrilobe shape of the male drive connector 204 and the female socket connector 208 has rounded edges, made of four connected arcs 210 .
- This shape avoids sharp corners where high levels of stress are caused in prior art connectors, and allows for greater forces between the male and female connectors as compared to the prior art.
- the quadrilobe shape minimizes stress levels and extends the life of the socket connector.
- torque generated thereby is distributed by the new quadrilobe shape over a greater area of the socket connector leading to less pressure on the walls of the device than the square connector of the prior art.
- FIG. 6 shows a perspective view of a quadrilobe female drive connector and a corresponding quadrilobe male connector of embodiments of the disclosed technology.
- a body 300 of a torque generating device comprises an output shaft 302 , having disposed therein a quadrilobe female drive connector 304 .
- An attachment 306 designed to connect to the torque generating device includes a quadrilobe male connector 308 , corresponding in shape to female drive connector 304 and designed to be received in drive connector 304 for connection therewith.
- an inner surface of female drive connector 304 contacts an end 309 of the male connector 308 .
- the quadrilobe shape of female drive connector 304 and of corresponding male connector 308 is defined as described hereinabove with reference to FIG. 3 , and include four arcs 310 whereby ends of two adjacent arcs meet to form a depression 312 between the arcs.
- FIG. 7 shows a perspective view of a quadrilobe female drive connector of embodiments of the disclosed technology forming part of a torque generating device and a corresponding quadrilobe male connector of embodiments of the disclosed technology.
- a torque generating device 320 here illustrated as a torque wrench, includes a body 300 including an output shaft 302 and a quadrilobe female drive connector 304 , as shown in FIG. 6 , as well as additional typical portions such as a grip 322 , an activation button 324 , and the like.
- An attachment 306 as shown in FIG. 6 includes quadrilobe male connector 308 corresponding in shape to drive connector 304 and designed to be received in the drive connector 304 for connection therewith.
- a quadrilobe connector as described herein may be used in any other suitable torque generating tool, such as, for example, a hydraulic or electric wrench.
- FIGS. 8A to 8E are schematic illustrations of one method for geometrically generating a quadrilobe shape as used in the disclosed technology, using four circles.
- a first step in development of a quadrilobe shape as used in FIGS. 3 to 7 is defining a circle 400 of diameter D, having a line 402 of length D, equal to the diameter of the circle, extending from the center 404 of the circle at a 45 degree angle.
- a second circle 406 having a diameter D is placed adjacent circle 400 , such that the end of line 402 extending out of circle 400 engages the center 408 of circle 406 .
- geometrical construct 412 includes a plurality of internal arcs 414 , which are removed in FIG. 8D .
- FIG. 8E four arcs are placed tangentially to arcs of the circles defining geometrical construct 412 , so as to eliminate the sharp corners of geometrical construct 412 , resulting a quadrilobe shape 420 as used in FIGS. 3 to 7 .
- the four arcs used to eliminate sharp corners are arcs of a circle having a diameter D, equal to the diameter D of the four circles used to define construct 412 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Retarders (AREA)
Abstract
A quadrilobe connector defined by a cross-sectional shape derived from a square, where each of the corners of the square is replaced with an arc of a circle, and ends of two adjacent arcs meet to form a depression between the arcs. Further, each of the four arcs is equal in radius and intersects tangentially to each other arc.
Description
- As known in the art, torque generated by various tools, such as a socket wrench tool, is transferred to an end effector by a feature that has a square cross section, such as a connector having a square cross section. However, transferring torque through the square feature creates high stress in the corners of the square, which are weak points in the design of such devices. Further, manufacturing the male and, more so, the female part of the square feature requires specialized machinery.
- The square drive with a spring loaded pin or ball to retain the end effector, as used in the prior art, is only reliably usable with light weight effectors such as small sockets. While, the square drive feature with a retainer pin and elastomeric ring can hold heavy end effectors, those effectors have loose parts which are easily lost and require many steps to install.
- There is thus a need in the art for a connector or fastener for use in a tool such as a socket wrench tool, having a non-square cross section which may receive the torque generated by the tool without putting high stress on the connector.
- U.S. Pat. No. 7,225,710 to Pacheco, Jr. discloses a lobed fastener with six lobes. The lobes are curvilinear having depressions which are joined from two arcs extending from corners of a hexagonal structure. The length of each lobe and each depression is unequal.
- U.S. Pat. No. 8,347,761 to Goss discloses a socket with six rounded lobes, wherein the corners of a hexagon are replaced with an arc of a circle. The ends of two adjacent arcs do not seem to meet to form a depression between the arcs.
- U.S. Patent Publication 2012/0165107 to Guo et al. discloses a plurality of engaging teeth formed on an inner peripheral wall of an engaging hole. In one embodiment, six rounded lobes are spaced there-around a male connector. The female connector has rounded lobes. In this reference the corners of a hexagon are replaced with an arc of a circle and ends of two adjacent arcs do not seem to meet to form a depression between the arcs.
- The disclosed technology described herein addresses a need, unfulfilled in the prior art, for providing a connector for a torque generating device which is not rapidly worn or sheared by stress resulting from the generated torque being transferred through the connector, and a torque generating device using such a connector.
- In accordance with one aspect of an embodiment of the disclosed technology, there is provided a quadrilobe connector including a male connector portion including a quadrilobe shaped protrusion and a female connector portion including a quadrilobe shaped socket, corresponding in shape to the quadrilobe shaped protrusion and configured to receive the quadrilobe shaped protrusion for connection thereof, wherein the quadrilobe shape is defined by a cross-sectional shape derived from a square, such that each corner of the square is replaced with an arc of a circle, the arc defining a lobe of the quadrilobe shape, ends of each two adjacent the arcs meet to form a depression between the adjacent arcs, and each of the arcs is equal in radius and intersects tangentially to each other the arc.
- In some embodiments, a radius of each the lobe and of each the depression is equal.
- In some embodiments, each arc is defined by a circle having a first radius, and each depression is defined by an arc of a circle having a second radius. In some such embodiments, the first radius is equal to the second radius.
- In some embodiments, the male connector portion is mounted on an output shaft of a torque generating device, and forms a drive connector for the device. In some such embodiments, the female connector portion comprises a socket disposed in a replaceable piece removably and replaceably connectable to the torque generating device.
- In some embodiments, the female connector portion comprises a socked disposed within an output shaft of a torque generating device, and forms a drive connector for the device. In some such embodiments, the male connector portion protrudes out of a replaceable piece removably and replaceably connectable to the torque generating device.
- In some embodiments, engagement of the quadrilobe protrusion of the male connector portion in the quadrilobe socket of the female connector portion during activation of a torque generating device results in distribution of the torque generated by the device on wall portions defined by the arcs and the depressions, thereby reducing stress caused by the generated torque on the torque generating device.
- In accordance with one aspect of an embodiment of the disclosed technology, there is provided a torque generating device, including a body portion adapted to be held by a user during operation of the device and a quadrilobe connector mounted on the body portion, the quadrilobe connector having a geometrical shape defined by a cross-sectional shape derived from a square, such that each corner of the square is replaced with an arc of a circle, the arc defining a lobe of the quadrilobe shape, ends of each two adjacent the arcs meet to form a depression between the adjacent arcs, and each of the arcs is equal in radius and intersects tangentially to each other the arc.
- In some embodiments, the quadrilobe connector comprises a male quadrilobe connector portion mounted on and protruding from an output shaft functionally associated with the body portion. In some such embodiments, the device further includes a replaceable piece removably and replaceably connectable to the torque generating device via the quadrilobe connector, the replaceable piece comprising a female quadrilobe connector portion forming a socket disposed therein, the socket corresponding in shape to the quadrilobe protrusion of the male quadrilobe connector portion and configured to receive the male quadrilobe connector portion for connection of the replaceable piece to the body portion.
- In some embodiments, the quadrilobe connector comprises a female quadrilobe connector socket portion disposed within an output shaft functionally associated with the body portion. In some such embodiments, the device further includes a replaceable piece removably and replaceably connectable to the torque generating device via the quadrilobe connector, the replaceable piece comprising a male quadrilobe connector portion protruding therefrom, the protrusion corresponding in shape to the quadrilobe socket of the female quadrilobe connector portion and configured to be received therein for connection of the replaceable piece to the body portion.
- In some embodiments, the torque generating device comprises a hydraulic torque wrench or a pneumatic torque wrench or an electric torque wrench.
-
FIG. 1 shows a perspective view of a square male drive connector and a corresponding square female socket connector of the prior art. -
FIG. 2 shows a perspective view of a square male drive connector forming part of a torque generating device and a corresponding square female socket connector of the prior art. -
FIG. 3 shows a perspective view of a quadrilobe male drive connector and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology. -
FIG. 4 shows front plan view and side elevation view of the quadrilobe male drive connector ofFIG. 3 . -
FIG. 5 shows a perspective view of a quadrilobe male drive connector forming part of a torque generating device and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology. -
FIG. 6 shows a perspective view of a quadrilobe female drive connector and a corresponding quadrilobe male connector of embodiments of the disclosed technology. -
FIG. 7 shows a perspective view of a quadrilobe female drive connector forming part of a torque generating device and a corresponding quadrilobe male connector of embodiments of the disclosed technology. -
FIGS. 8A to 8E are schematic illustrations of geometrical progression of generating a quadrilobe shape as used in the disclosed technology. - The presently disclosed technology is directed towards a quadrilobe socket connector designed to lower the stress level on the walls of male and female connecting socket devices when they are engaged. The quadrilobe shape allows the socket to transfer more torque, be more durable, and be procured less expensively than the prior art versions as standardized machinery may be used in the manufacture of same.
-
FIG. 1 shows a perspective view of a square male drive connector of the prior art, and of a corresponding female socket connector of the prior art. As seen, thebody 100 of a torque generating device comprises anoutput shaft 102, having protruding therefrom a squaremale drive connector 104. Anattachment 106 designed to connect to the torque generating device, includes a squarefemale socket connector 108 corresponding in shape to driveconnector 104 and designed to receivedrive connector 104 for connection therewith. -
FIG. 2 shows a perspective view of a square male drive connector of the prior art forming part of a torque generating device, and a corresponding square female socket connector of the prior art. As seen, atorque generating device 110, here illustrated as a torque wrench, includes abody 100 including anoutput shaft 102 and a squaremale drive connector 104, as shown inFIG. 1 , as well as additional typical portions such as agrip 112, anactivation button 114, and the like. Anattachment 106 as shown inFIG. 1 , includes squarefemale socket connector 108 corresponding in shape to driveconnector 104 and designed to receive thedrive connector 104 for connection therewith. For example,attachment 106 may form part of a larger tool (not shown). - During use of the
torque generating device 110, for example by activation ofactivation button 114, the torque generated by the device transfers through the squaremale drive connector 104, causing high stress levels on the corners of the square shapemale drive connector 104 and of the corresponding squarefemale socket connector 108 and leading to excessive wear and premature failure of thedevice 110. -
FIG. 3 shows a perspective view of a quadrilobe male drive connector and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology.FIG. 4 shows front plan view and side elevation view of the quadrilobe male drive connector ofFIG. 3 . - As seen in
FIGS. 3 and 4 , abody 200 of a torque generating device comprises anoutput shaft 202, having protruding therefrom a quadrilobemale drive connector 204. Anattachment 206 designed to connect to the torque generating device, includes a quadrilobefemale socket connector 208 corresponding in shape to driveconnector 204 and designed to receivedrive connector 204 for connection therewith. When connected, afront end 205 ofmale drive connector 204 contacts an inner surface of thefemale socket connector 208. - The quadrilobe shape of
drive connector 204 and ofcorresponding socket connector 208 is defined as having a cross-sectional shape derived from a square, whereby each of the corners of the square is replaced with anarc 210 of a circle, whereby ends of two adjacent arcs meet to form adepression 212 between the arcs. In some embodiments, each of the fourarcs 210 is equal in radius and intersects tangentially to eachother arc 210. In some embodiments, the radius of each lobe, and eachdepression 212, is equal. - In another embodiment, a square connector with rounded corners may be used. In yet another embodiment, more than four lobes may be used, such as five or six lobes.
- Turning specifically to
FIG. 4 , the front plan view shows the fourdepressions 212 between the arcs on thefront end 205 of themale drive connector 204. Furthermore, the side elevation view shows a view of adepression 212 between thearcs 210 of themale drive connector 204, from the side. -
FIG. 5 shows a quadrilobe male drive connector of embodiments of the disclosed technology forming part of a torque generating device and a corresponding quadrilobe female socket connector of embodiments of the disclosed technology. As seen, atorque generating device 220, here illustrated as a torque wrench, includes abody 200 including anoutput shaft 202 and a quadrilobemale drive connector 204, as shown inFIG. 3 , as well as additional typical portions such as agrip 222, anactivation button 224, and the like. Anattachment 206 as shown inFIG. 3 , includes quadrilobefemale socket connector 208 corresponding in shape to driveconnector 204 and designed to receive thedrive connector 204 for connection therewith. - It is a particular feature of the teachings herein that the quadrilobe shape of the
male drive connector 204 and thefemale socket connector 208 has rounded edges, made of fourconnected arcs 210. This shape avoids sharp corners where high levels of stress are caused in prior art connectors, and allows for greater forces between the male and female connectors as compared to the prior art. As a result, the quadrilobe shape minimizes stress levels and extends the life of the socket connector. During use of thetorque generating device 220, for example by activation ofactivation button 224, torque generated thereby is distributed by the new quadrilobe shape over a greater area of the socket connector leading to less pressure on the walls of the device than the square connector of the prior art. -
FIG. 6 shows a perspective view of a quadrilobe female drive connector and a corresponding quadrilobe male connector of embodiments of the disclosed technology. - As seen in
FIG. 6 , abody 300 of a torque generating device comprises anoutput shaft 302, having disposed therein a quadrilobefemale drive connector 304. Anattachment 306 designed to connect to the torque generating device, includes aquadrilobe male connector 308, corresponding in shape tofemale drive connector 304 and designed to be received indrive connector 304 for connection therewith. When connected, an inner surface offemale drive connector 304 contacts anend 309 of themale connector 308. The quadrilobe shape offemale drive connector 304 and of correspondingmale connector 308 is defined as described hereinabove with reference toFIG. 3 , and include fourarcs 310 whereby ends of two adjacent arcs meet to form adepression 312 between the arcs. -
FIG. 7 shows a perspective view of a quadrilobe female drive connector of embodiments of the disclosed technology forming part of a torque generating device and a corresponding quadrilobe male connector of embodiments of the disclosed technology. As seen, atorque generating device 320, here illustrated as a torque wrench, includes abody 300 including anoutput shaft 302 and a quadrilobefemale drive connector 304, as shown inFIG. 6 , as well as additional typical portions such as agrip 322, anactivation button 324, and the like. Anattachment 306 as shown inFIG. 6 , includesquadrilobe male connector 308 corresponding in shape to driveconnector 304 and designed to be received in thedrive connector 304 for connection therewith. - It is appreciated that though the disclosure herein relates to a specific type of torque generating tool, namely a pneumatic socket wrench, a quadrilobe connector as described herein may be used in any other suitable torque generating tool, such as, for example, a hydraulic or electric wrench.
-
FIGS. 8A to 8E are schematic illustrations of one method for geometrically generating a quadrilobe shape as used in the disclosed technology, using four circles. - As seen in
FIG. 8A , a first step in development of a quadrilobe shape as used inFIGS. 3 to 7 , is defining acircle 400 of diameter D, having aline 402 of length D, equal to the diameter of the circle, extending from thecenter 404 of the circle at a 45 degree angle. At the next step, illustrated inFIG. 8B , asecond circle 406 having a diameter D is placedadjacent circle 400, such that the end ofline 402 extending out ofcircle 400 engages thecenter 408 ofcircle 406. - In
FIG. 8C , the geometrical construct ofFIG. 8B is mirrored and centered over the geometrical construct ofFIG. 8B such that the middle of line 402 (ofFIG. 8B ) intersects the middle of line 410 (of the mirrored geometrical construct), resulting in a flower-likegeometrical construct 412. As seen,geometrical construct 412 includes a plurality ofinternal arcs 414, which are removed inFIG. 8D . - In
FIG. 8E , four arcs are placed tangentially to arcs of the circles defininggeometrical construct 412, so as to eliminate the sharp corners ofgeometrical construct 412, resulting aquadrilobe shape 420 as used inFIGS. 3 to 7 . In some embodiments, the four arcs used to eliminate sharp corners are arcs of a circle having a diameter D, equal to the diameter D of the four circles used to defineconstruct 412. - While the disclosed technology has been taught with specific reference to the above embodiments, a person having ordinary skill in the art will recognize that changes can be made in form and detail without departing from the spirit and the scope of the disclosed technology. The described embodiments are to be considered in all respects only as illustrative and not restrictive. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope. Combinations of any of the methods, systems, and devices described herein above are also contemplated and within the scope of the invention.
Claims (16)
1. A quadrilobe connector comprising:
a male connector portion including a quadrilobe shaped protrusion; and
a female connector portion including a quadrilobe shaped socket, corresponding in shape to said quadrilobe shaped protrusion and configured to receive said quadrilobe shaped protrusion for connection thereof,
wherein said quadrilobe shape is defined by a cross-sectional shape derived from a square, such that:
each corner of said square is replaced with an arc of a circle, said arc defining a lobe of said quadrilobe shape;
ends of each two adjacent said arcs meet to form a depression between said adjacent arcs; and
each of said arcs is equal in radius and intersects tangentially to each other said arc.
2. The quadrilobe connector of claim 1 , wherein a radius of each said lobe and of each said depression is equal.
3. The quadrilobe connector of claim 1 , wherein each said arc is defined by a circle having a first radius, and each said depression is defined by an arc of a circle having a second radius.
4. The quadrilobe connector of claim 3 , wherein said first radius is equal to said second radius.
5. The quadrilobe connector of claim 1 , wherein said male connector portion is mounted on an output shaft of a torque generating device, and forms a drive connector for said device.
6. The quadrilobe connector of claim 5 , wherein said female connector portion comprises a socket disposed in a replaceable piece removably and replaceably connectable to said torque generating device.
7. The quadrilobe connector of claim 1 , wherein said female connector portion comprises a socked disposed within an output shaft of a torque generating device, and forms a drive connector for said device.
8. The quadrilobe connector of claim 7 , wherein said male connector portion protrudes out of a replaceable piece removably and replaceably connectable to said torque generating device.
9. The quadrilobe connector of claim 1 , wherein engagement of said quadrilobe protrusion of said male connector portion in said quadrilobe socket of said female connector portion during activation of a torque generating device results in distribution of the torque generated by the device on wall portions defined by said arcs and said depressions, thereby reducing stress caused by the generated torque on the torque generating device.
10. A torque generating device, comprising:
a body portion adapted to be held by a user during operation of said device; and
a quadrilobe connector mounted on said body portion, said quadrilobe connector having a geometrical shape defined by a cross-sectional shape derived from a square, such that each corner of said square is replaced with an arc of a circle, said arc defining a lobe of said quadrilobe shape, ends of each two adjacent said arcs meet to form a depression between said adjacent arcs, and each of said arcs is equal in radius and intersects tangentially to each other said arc.
11. The torque generating device of claim 10 , wherein a radius of each said lobe and of each said depression of said quadrilobe connector is equal.
12. The torque generating device of claim 10 , wherein said quadrilobe connector comprises a male quadrilobe connector portion mounted on and protruding from an output shaft functionally associated with said body portion.
13. The torque generating device of claim 12 , also including a replaceable piece removably and replaceably connectable to said torque generating device via said quadrilobe connector, said replaceable piece comprising a female quadrilobe connector portion forming a socket disposed therein, said socket corresponding in shape to said quadrilobe protrusion of said male quadrilobe connector portion and configured to receive said male quadrilobe connector portion for connection of said replaceable piece to said body portion.
14. The torque generating device of claim 10 , wherein said quadrilobe connector comprises a female quadrilobe connector socket portion disposed within an output shaft functionally associated with said body portion.
15. The torque generating device of claim 14 , also including a replaceable piece removably and replaceably connectable to said torque generating device via said quadrilobe connector, said replaceable piece comprising a male quadrilobe connector portion protruding therefrom, said protrusion corresponding in shape to said quadrilobe socket of said female quadrilobe connector portion and configured to be received therein for connection of said replaceable piece to said body portion.
16. The torque generating device of claim 10 , wherein said torque generating device comprises one of a hydraulic torque wrench or a pneumatic torque wrench
Priority Applications (1)
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US14/514,442 US20150107421A1 (en) | 2013-10-17 | 2014-10-15 | Quadrilobe connector for transmitting torque |
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US201361892130P | 2013-10-17 | 2013-10-17 | |
US14/514,442 US20150107421A1 (en) | 2013-10-17 | 2014-10-15 | Quadrilobe connector for transmitting torque |
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US14/514,457 Active US9016173B1 (en) | 2013-10-17 | 2014-10-15 | Reaction device for reducing stress on torque generating tools |
US14/514,442 Abandoned US20150107421A1 (en) | 2013-10-17 | 2014-10-15 | Quadrilobe connector for transmitting torque |
US14/695,885 Active 2036-10-19 US10220496B2 (en) | 2013-10-17 | 2015-04-24 | Reaction device for reducing stress on torque generating tools |
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US14/514,448 Abandoned US20150111692A1 (en) | 2013-10-17 | 2014-10-15 | Planetary gear train for use with extended length sun in high torque applications |
US14/514,457 Active US9016173B1 (en) | 2013-10-17 | 2014-10-15 | Reaction device for reducing stress on torque generating tools |
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US14/695,885 Active 2036-10-19 US10220496B2 (en) | 2013-10-17 | 2015-04-24 | Reaction device for reducing stress on torque generating tools |
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Also Published As
Publication number | Publication date |
---|---|
US20150107419A1 (en) | 2015-04-23 |
US9016173B1 (en) | 2015-04-28 |
US20150231772A1 (en) | 2015-08-20 |
US10220496B2 (en) | 2019-03-05 |
US20150111692A1 (en) | 2015-04-23 |
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Owner name: TORQ FUSION LLC, NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAFTOIU, RADU;REEL/FRAME:035249/0285 Effective date: 20150324 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |