US20150107419A1 - Reaction Device for Reducing Stress on Torque Generating Tools - Google Patents
Reaction Device for Reducing Stress on Torque Generating Tools Download PDFInfo
- Publication number
- US20150107419A1 US20150107419A1 US14/514,457 US201414514457A US2015107419A1 US 20150107419 A1 US20150107419 A1 US 20150107419A1 US 201414514457 A US201414514457 A US 201414514457A US 2015107419 A1 US2015107419 A1 US 2015107419A1
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- Prior art keywords
- reaction
- generating device
- torque generating
- reaction arm
- head
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- 238000005516 engineering process Methods 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 9
- 238000009987 spinning Methods 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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 reaction devices and arms are designed to be used with torque generating devices or tools to transfer the reaction torque from the device or tool to the designated reaction point and to protect the operator from said reaction torque; overall they prevent rotation of the tool about itself.
- Typical reaction devices of the prior art are mounted on a small spline-like portion of the torque generating device. As a result, unwanted stress from the side load generated are applied to the torque generating device, causing slight deformation of the torque generating device which leads to great wear and reduction in performance of the torque generating device.
- reaction arm which prevents annular misalignment between the reaction arm and the torque generating device and which directs all the energy generated by the device to the work area requiring the torque.
- U.S. Pat. No. 8,192,322 to Van Bogaert et al discloses a wind turbine drive which is formed of a rotor with a rotor shaft and of a transmission box with a planetary gear unit.
- the transmission box is provided with a reaction arm which transmits a reaction torque around the rotary shaft from the transmission box to the nacelle so as to prevent the transmission box from turning along with the rotor shaft. It appears that this reference discloses a reaction arm preventing rotation of a transmission gear. However the reaction arm does not surround a significant part of the gear box.
- U.S. Pat. No. 8,646,589 to Janson et al discloses a transmission latching mechanism including a component of a transmission gear-set.
- Two non-rotating housing components which surround a large part of the gear box comprise a reaction component.
- the reaction device in this case does not comprise a reaction arm per se, and does not prevent annular misalignment between the gear box and the reaction component.
- U.S. Patent Application Publication 2013/0324344 to Pohl et al discloses continuously variable transmission devices and systems, including a torque governor comprising two reaction arms.
- the reaction arms assist the torque governor in adjusting the transmission speed ratio to maintain a constant operating torque.
- two reaction arms are required for operation of the disclosed device, and neither of the reaction arms engages a large portion of the device.
- a reaction device including: a head of a torque generating device comprising an output shaft including a drive connector, an optional external guide bushing engagement surface formed on the exterior of a portion of the output shaft, an external male spline formed on the exterior of a portion of the housing, and a housing portion formed around a portion of the output shaft excluding the external guide bushing engagement surface and the male spline; and a reaction arm including a reaction bar and a body portion including an internal female spline and a guide bushing, wherein the body portion of the reaction arm wraps around the head of the torque generating device, such that an internal surface of the body portion engages the housing portion of the torque generating device, the female spline engages the male spline, and the guide bushing engages the guide bushing engagement surface.
- reaction bar and the body portion of the reaction arm form a unitary structure.
- engagement of the unitary structure with the head of the torque generating device prevents annular misalignment between the reaction arm and the head of the torque generating device.
- the external guide bushing engagement surface has a first external diameter
- the male spline has a second external diameter
- the housing portion has a third external diameter
- the guide bushing has a first internal diameter corresponding to the first external diameter
- the female spline has a second internal diameter corresponding to the second external diameter
- the body portion of the reaction arm has a third internal diameter corresponding to the third external diameter
- the first, second, and third internal diameters are distinctly sized.
- a length of an engagement area of the head of the torque generating device and the reaction arm is sufficiently large to ensure that all reactive torque forces generated by the torque generating device are transmitted onto the reaction arm.
- a majority of the external surfaces of the head of the torque generating device engage internal surface of the reaction arm.
- reaction arm for use with a torque generating device, the reaction arm including a reaction bar, and a body portion having a first internal diameter, and having formed on an internal surface thereof a female spline having a second internal diameter and a guide bushing having a third internal diameter, the first, second, and third internal diameter being distinctly sized.
- reaction bar, the body portion, the female spline, and the guide bushing form a unitary structure.
- the body portion is configured to wrap around a head portion of a torque generating device, such that the majority of the surface of the head portion engages internal surfaces of the reaction arm.
- the body portion is configured to wrap around a head portion of a torque generating device, such that the guide bushing engages a guide bushing engagement surface of the torque generating device output shaft, the female spline engages a male spline of the torque generating device, and an internal surface of the body portion having the first internal diameter engaging a housing portion of the torque generating device.
- FIGS. 1A and 1B respectively show a perspective view and a sectional view of a reaction device according to the prior art, when unassembled.
- FIGS. 2A and 2B respectively show a perspective view and a sectional view of a reaction device according to the prior art, when assembled.
- FIGS. 3A and 3B respectively show a perspective view and a sectional view of a reaction device according to an embodiment of the disclosed technology, when unassembled.
- FIGS. 4A and 4B respectively show a perspective view and a sectional view of a reaction device according to an embodiment of the disclosed technology, when assembled.
- the presently disclosed technology is directed towards a reaction device or a reaction arm for use with a torque generating device, which reaction device wraps around a significant portion of the torque generating device, and specifically wraps around an area corresponding to three distinctly sized internal diameters of the torque generating device, while preventing annular misalignment between the reaction device and the torque generating device.
- FIGS. 1A and 1B respectively show a perspective view and a sectional view of a reaction device 10 according to the prior art, when unassembled.
- the reaction device 10 includes a reaction arm 20 designed to engage a torque generating device 30 , here shown as a torque wrench.
- the reaction arm 20 includes a female spline 22 and a reaction bar 24 .
- the torque wrench 30 includes an output shaft 32 , a torque wrench body 34 , and a male spline 36 , as well as a drive connector 38 , here shown as a square drive connector, configured to connect to another portion of the torque wrench (not shown).
- Female spline 22 of the reaction arm 20 is designed to engage male spline 36 of the torque wrench 30 , such that action carried out by the operator on reaction bar 24 is transferred via female spline 22 and male spline 36 to torque wrench 30 , and is converted into rotational motion therein.
- the output shaft 32 rotates through a guide bushing (unlabeled) forming part of torque wrench 30 .
- FIGS. 2A and 2B respectively show a perspective view and a sectional view of the reaction device 10 according to the prior art, when assembled.
- female spline 22 of reaction arm 20 engages male spline 36 of torque wrench 30 .
- the reaction arm 20 may abut against a stationary device, to prevent the entire torque wrench 30 from rotating while being used.
- the engagement of the male spline 36 and female spline 22 further keeps the reaction arm 20 from rotating with respect to the torque wrench 30 .
- the reaction arm may abut against a nut or bolt, so that when rotational forces are applied as the torque wrench 30 is being used, the reaction arm 20 prevents the torque wrench from spinning about its own axis, thus causing the rotational forces to act on the desired device (here, a nut which is under the torque wrench device).
- reaction arm 20 When reaction device 10 is in use, torque is applied to reaction arm 20 .
- an unwanted moment occurs between the reaction arm 20 and torque wrench 30 , when in use. This moment often creates an angular misalignment between the reaction arm 20 and torque wrench 30 , which in turn often causes side forces to be applied to the torque wrench body 34 , which may actually slightly deform the torque wrench body 34 .
- the side forces applied to body 34 comprise wasted energy which fails to go into turning the nut or other fastener being acted upon by torque wrench 30 .
- the unwanted moment between the reaction arm 20 and the torque wrench 30 may deform a portion of the torque wrench 30 which contains the guide bushing, acting as a brake on the drive connector 3 .
- FIGS. 3A and 3B respectively show a perspective view and a sectional view of a reaction device 110 according to an embodiment of the disclosed technology, when unassembled.
- the reaction device 110 includes a reaction arm 120 designed to engage a torque generating device 130 , here shown as a torque wrench.
- the reaction arm 120 includes a support cup 121 , having a female spline 122 and an optional guide bushing 123 formed on an interior surface of the support cup 121 .
- Reaction arm 120 further includes a reaction bar 124 . It is a particular feature of the disclosed technology that support cup 121 , guide bushing 123 , and female spline 122 are integrally formed and form a unitary structure, having three distinctly sized internal diameters.
- the torque wrench 130 includes an output shaft 132 enclosed in a torque wrench body 134 .
- the torque wrench body 134 defines a male spline 136 , configured to engage male spline 122 of the reaction arm 120 .
- output shaft 132 includes an optional guide bushing engagement surface 137 for engagement with guide bushing 123 of reaction arm 120 .
- Output shaft 132 further includes a drive connector 138 , here shown as a square drive connector, configured to connect to another portion of the torque wrench (not shown).
- torque wrench body 134 male spline 136 , and guide bushing engagement surface 137 have three distinctly sized exterior diameters, sized to engage the three distinctly sized interior diameters of reaction arm 120 .
- FIGS. 4A and 4B respectively show a perspective view and a sectional view of the reaction device 110 according to an embodiment of the disclosed technology, when assembled.
- reaction arm 120 wraps around an exterior of torque wrench 130 , such that an inner surface of support cup 121 engages torque wrench body 134 , female spline 122 of reaction arm 120 engages male spline 136 of torque wrench 130 , and guide bushing 123 of the reaction arm 120 engages guide bushing engagement surface 137 of torque wrench 130 .
- the reaction arm 120 may abut against a stationary device, to prevent the entire torque wrench 130 from rotating while being used.
- the respective engagement between inner surfaces 121 , 122 , and 123 of the reaction arm 120 and surfaces 134 , 136 , and 137 of the torque wrench 130 further keep the reaction arm 120 from rotating with respect to the torque wrench 130 .
- the reaction arm 120 may abut against a nut or bolt, so that when rotational forces are applied as the torque wrench 130 is being used, the reaction arm 120 prevents the torque wrench from spinning about its own axis, thus causing the rotational forces to act on the desired device (in this case, a nut which is under the torque wrench device).
- the unitary structure formed by support cup 121 , female guide 122 , and guide bushing 123 prevents angular misalignment between the reaction arm 120 and torque wrench 130 , and specifically square drive connector 138 , which in prior art devices is created from unwanted moment between the components.
- guide busings are typically only found in the torque wrench. Incorporation of guide bushing 123 , instead or additionally into the reaction arm 120 results in the reaction arm guiding the output shaft 132 thus further minimizing angular misalignment between the reaction arm 120 and drive connector 138 of torque wrench 130 .
- female spline 122 located on the interior of reaction arm 120 and unitarily attached to support cup 121 , engages corresponding male spline 136 of the torque wrench 130 .
- This spline engagement extends the length of the engagement surface between the reaction arm 120 and torque wrench 130 , ensuring that all reactive torque forces generated by the torque wrench 130 are transmitted onto the reaction arm 120 abutted against a stationary device, to prevent the torque wrench 130 from rotating while being used while also ensuring that all force generated by the torque wrench is used for operation of the torque wrench 130 and reducing stress and wear on components of the torque wrench 130 and of the reaction arm 120 .
Abstract
Description
- Torque reaction devices and arms are designed to be used with torque generating devices or tools to transfer the reaction torque from the device or tool to the designated reaction point and to protect the operator from said reaction torque; overall they prevent rotation of the tool about itself. Typical reaction devices of the prior art are mounted on a small spline-like portion of the torque generating device. As a result, unwanted stress from the side load generated are applied to the torque generating device, causing slight deformation of the torque generating device which leads to great wear and reduction in performance of the torque generating device.
- In some prior art devices, there is a distance between a point acting as a pivot point of the reaction arm and the point of reaction where the reaction force is applied. In such cases, an unwanted moment occurs between the reaction arm and torque generating device, when in use. This unwanted moment often creates an angular misalignment between the reaction arm and the torque generating device, which may in turn cause side forces which may actually slightly deform a portion of the torque generating device. Additionally, the unwanted moment and side forces waste energy which fails to go into operating the torque generating device and instead cause significant wear on the device.
- There is thus a need in the art for a reaction arm which prevents annular misalignment between the reaction arm and the torque generating device and which directs all the energy generated by the device to the work area requiring the torque.
- U.S. Pat. No. 8,192,322 to Van Bogaert et al discloses a wind turbine drive which is formed of a rotor with a rotor shaft and of a transmission box with a planetary gear unit. The transmission box is provided with a reaction arm which transmits a reaction torque around the rotary shaft from the transmission box to the nacelle so as to prevent the transmission box from turning along with the rotor shaft. It appears that this reference discloses a reaction arm preventing rotation of a transmission gear. However the reaction arm does not surround a significant part of the gear box.
- U.S. Pat. No. 8,646,589 to Janson et al discloses a transmission latching mechanism including a component of a transmission gear-set. Two non-rotating housing components which surround a large part of the gear box comprise a reaction component. However, it appears that the reaction device in this case does not comprise a reaction arm per se, and does not prevent annular misalignment between the gear box and the reaction component.
- U.S. Patent Application Publication 2013/0324344 to Pohl et al discloses continuously variable transmission devices and systems, including a torque governor comprising two reaction arms. The reaction arms assist the torque governor in adjusting the transmission speed ratio to maintain a constant operating torque. However, two reaction arms are required for operation of the disclosed device, and neither of the reaction arms engages a large portion of the device.
- The disclosed technology described herein addresses a need, unfulfilled in the prior art, for providing a reaction device, including: a head of a torque generating device comprising an output shaft including a drive connector, an optional external guide bushing engagement surface formed on the exterior of a portion of the output shaft, an external male spline formed on the exterior of a portion of the housing, and a housing portion formed around a portion of the output shaft excluding the external guide bushing engagement surface and the male spline; and a reaction arm including a reaction bar and a body portion including an internal female spline and a guide bushing, wherein the body portion of the reaction arm wraps around the head of the torque generating device, such that an internal surface of the body portion engages the housing portion of the torque generating device, the female spline engages the male spline, and the guide bushing engages the guide bushing engagement surface.
- In some embodiments, the reaction bar and the body portion of the reaction arm, including the internal female spline and the guide bushing, form a unitary structure. In some such embodiments, engagement of the unitary structure with the head of the torque generating device prevents annular misalignment between the reaction arm and the head of the torque generating device.
- In some embodiments, the external guide bushing engagement surface has a first external diameter, the male spline has a second external diameter, and the housing portion has a third external diameter, the guide bushing has a first internal diameter corresponding to the first external diameter, the female spline has a second internal diameter corresponding to the second external diameter, and the body portion of the reaction arm has a third internal diameter corresponding to the third external diameter, and the first, second, and third internal diameters are distinctly sized.
- In some embodiments, a length of an engagement area of the head of the torque generating device and the reaction arm is sufficiently large to ensure that all reactive torque forces generated by the torque generating device are transmitted onto the reaction arm.
- In some embodiments, a majority of the external surfaces of the head of the torque generating device engage internal surface of the reaction arm.
- In accordance with an aspect of some embodiments of the disclosed technology there is also provided a reaction arm for use with a torque generating device, the reaction arm including a reaction bar, and a body portion having a first internal diameter, and having formed on an internal surface thereof a female spline having a second internal diameter and a guide bushing having a third internal diameter, the first, second, and third internal diameter being distinctly sized.
- In some embodiments, the reaction bar, the body portion, the female spline, and the guide bushing form a unitary structure.
- In some embodiments, the body portion is configured to wrap around a head portion of a torque generating device, such that the majority of the surface of the head portion engages internal surfaces of the reaction arm.
- In some embodiments, the body portion is configured to wrap around a head portion of a torque generating device, such that the guide bushing engages a guide bushing engagement surface of the torque generating device output shaft, the female spline engages a male spline of the torque generating device, and an internal surface of the body portion having the first internal diameter engaging a housing portion of the torque generating device.
-
FIGS. 1A and 1B respectively show a perspective view and a sectional view of a reaction device according to the prior art, when unassembled. -
FIGS. 2A and 2B respectively show a perspective view and a sectional view of a reaction device according to the prior art, when assembled. -
FIGS. 3A and 3B respectively show a perspective view and a sectional view of a reaction device according to an embodiment of the disclosed technology, when unassembled. -
FIGS. 4A and 4B respectively show a perspective view and a sectional view of a reaction device according to an embodiment of the disclosed technology, when assembled. - The presently disclosed technology is directed towards a reaction device or a reaction arm for use with a torque generating device, which reaction device wraps around a significant portion of the torque generating device, and specifically wraps around an area corresponding to three distinctly sized internal diameters of the torque generating device, while preventing annular misalignment between the reaction device and the torque generating device.
-
FIGS. 1A and 1B respectively show a perspective view and a sectional view of areaction device 10 according to the prior art, when unassembled. As seen, thereaction device 10 includes areaction arm 20 designed to engage a torque generatingdevice 30, here shown as a torque wrench. Thereaction arm 20 includes afemale spline 22 and areaction bar 24. - The
torque wrench 30 includes anoutput shaft 32, atorque wrench body 34, and amale spline 36, as well as adrive connector 38, here shown as a square drive connector, configured to connect to another portion of the torque wrench (not shown).Female spline 22 of thereaction arm 20 is designed to engagemale spline 36 of thetorque wrench 30, such that action carried out by the operator onreaction bar 24 is transferred viafemale spline 22 andmale spline 36 totorque wrench 30, and is converted into rotational motion therein. Typically, theoutput shaft 32 rotates through a guide bushing (unlabeled) forming part oftorque wrench 30. - Reference is now made to
FIGS. 2A and 2B , which respectively show a perspective view and a sectional view of thereaction device 10 according to the prior art, when assembled. As seen,female spline 22 ofreaction arm 20 engagesmale spline 36 oftorque wrench 30. Thereaction arm 20 may abut against a stationary device, to prevent theentire torque wrench 30 from rotating while being used. The engagement of themale spline 36 andfemale spline 22 further keeps thereaction arm 20 from rotating with respect to thetorque wrench 30. - In some uses of the
torque wrench 30, the reaction arm may abut against a nut or bolt, so that when rotational forces are applied as thetorque wrench 30 is being used, thereaction arm 20 prevents the torque wrench from spinning about its own axis, thus causing the rotational forces to act on the desired device (here, a nut which is under the torque wrench device). - When
reaction device 10 is in use, torque is applied toreaction arm 20. A distance, indicated by D, exists between the engagement ofsplines reaction arm 20 where the reaction force is applied. As such, in prior art devices, an unwanted moment occurs between thereaction arm 20 andtorque wrench 30, when in use. This moment often creates an angular misalignment between thereaction arm 20 andtorque wrench 30, which in turn often causes side forces to be applied to thetorque wrench body 34, which may actually slightly deform thetorque wrench body 34. Additionally, the side forces applied tobody 34 comprise wasted energy which fails to go into turning the nut or other fastener being acted upon bytorque wrench 30. Additionally, the unwanted moment between thereaction arm 20 and thetorque wrench 30 may deform a portion of thetorque wrench 30 which contains the guide bushing, acting as a brake on the drive connector 3. -
FIGS. 3A and 3B respectively show a perspective view and a sectional view of areaction device 110 according to an embodiment of the disclosed technology, when unassembled. As seen, thereaction device 110 includes areaction arm 120 designed to engage a torque generatingdevice 130, here shown as a torque wrench. - The
reaction arm 120 includes asupport cup 121, having afemale spline 122 and anoptional guide bushing 123 formed on an interior surface of thesupport cup 121.Reaction arm 120 further includes areaction bar 124. It is a particular feature of the disclosed technology that supportcup 121, guidebushing 123, andfemale spline 122 are integrally formed and form a unitary structure, having three distinctly sized internal diameters. - The
torque wrench 130 includes anoutput shaft 132 enclosed in atorque wrench body 134. Thetorque wrench body 134 defines amale spline 136, configured to engagemale spline 122 of thereaction arm 120. On the exterior thereof,output shaft 132 includes an optional guidebushing engagement surface 137 for engagement withguide bushing 123 ofreaction arm 120.Output shaft 132 further includes adrive connector 138, here shown as a square drive connector, configured to connect to another portion of the torque wrench (not shown). - It is a particular feature of the disclosed technology that
torque wrench body 134,male spline 136, and guidebushing engagement surface 137 have three distinctly sized exterior diameters, sized to engage the three distinctly sized interior diameters ofreaction arm 120. -
FIGS. 4A and 4B respectively show a perspective view and a sectional view of thereaction device 110 according to an embodiment of the disclosed technology, when assembled. As seen,reaction arm 120 wraps around an exterior oftorque wrench 130, such that an inner surface ofsupport cup 121 engagestorque wrench body 134,female spline 122 ofreaction arm 120 engagesmale spline 136 oftorque wrench 130, and guidebushing 123 of thereaction arm 120 engages guidebushing engagement surface 137 oftorque wrench 130. - Similar to the functionality of the reaction device of the prior art, the
reaction arm 120 may abut against a stationary device, to prevent theentire torque wrench 130 from rotating while being used. The respective engagement betweeninner surfaces reaction arm 120 and surfaces 134, 136, and 137 of thetorque wrench 130 further keep thereaction arm 120 from rotating with respect to thetorque wrench 130. Additionally, In some uses of thetorque wrench 130, thereaction arm 120 may abut against a nut or bolt, so that when rotational forces are applied as thetorque wrench 130 is being used, thereaction arm 120 prevents the torque wrench from spinning about its own axis, thus causing the rotational forces to act on the desired device (in this case, a nut which is under the torque wrench device). - It is a particular feature of the disclosed technology that the unitary structure formed by
support cup 121,female guide 122, and guidebushing 123 prevents angular misalignment between thereaction arm 120 andtorque wrench 130, and specificallysquare drive connector 138, which in prior art devices is created from unwanted moment between the components. In the prior art, guide busings are typically only found in the torque wrench. Incorporation ofguide bushing 123, instead or additionally into thereaction arm 120 results in the reaction arm guiding theoutput shaft 132 thus further minimizing angular misalignment between thereaction arm 120 and driveconnector 138 oftorque wrench 130. - It is a further feature of the disclosed technology that
female spline 122, located on the interior ofreaction arm 120 and unitarily attached to supportcup 121, engages correspondingmale spline 136 of thetorque wrench 130. This spline engagement extends the length of the engagement surface between thereaction arm 120 andtorque wrench 130, ensuring that all reactive torque forces generated by thetorque wrench 130 are transmitted onto thereaction arm 120 abutted against a stationary device, to prevent thetorque wrench 130 from rotating while being used while also ensuring that all force generated by the torque wrench is used for operation of thetorque wrench 130 and reducing stress and wear on components of thetorque wrench 130 and of thereaction arm 120. - 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 (15)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/514,457 US9016173B1 (en) | 2013-10-17 | 2014-10-15 | Reaction device for reducing stress on torque generating tools |
US14/695,885 US10220496B2 (en) | 2013-10-17 | 2015-04-24 | Reaction device for reducing stress on torque generating tools |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US201361892130P | 2013-10-17 | 2013-10-17 | |
US14/514,457 US9016173B1 (en) | 2013-10-17 | 2014-10-15 | Reaction device for reducing stress on torque generating tools |
Related Child Applications (1)
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US14/695,885 Continuation US10220496B2 (en) | 2013-10-17 | 2015-04-24 | Reaction device for reducing stress on torque generating tools |
Publications (2)
Publication Number | Publication Date |
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US20150107419A1 true US20150107419A1 (en) | 2015-04-23 |
US9016173B1 US9016173B1 (en) | 2015-04-28 |
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US14/514,442 Abandoned US20150107421A1 (en) | 2013-10-17 | 2014-10-15 | Quadrilobe connector for transmitting torque |
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 |
US14/695,885 Active 2036-10-19 US10220496B2 (en) | 2013-10-17 | 2015-04-24 | Reaction device for reducing stress on torque generating tools |
Family Applications Before (2)
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US14/514,442 Abandoned US20150107421A1 (en) | 2013-10-17 | 2014-10-15 | Quadrilobe connector for transmitting torque |
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 |
Family Applications After (1)
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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 |
---|---|
US9016173B1 (en) | 2015-04-28 |
US20150107421A1 (en) | 2015-04-23 |
US20150111692A1 (en) | 2015-04-23 |
US10220496B2 (en) | 2019-03-05 |
US20150231772A1 (en) | 2015-08-20 |
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