Patent Publication Number: US-2020300306-A1

Title: Rotary Power Coupler Assembly

Description:
FIELD OF THE INVENTION 
     This invention relates to mechanical rotary power connectors or coupler devices. More particularly, the invention relates to such devices which are adapted for alternative connection and disconnection for interchangeably translating rotary power from a motor means to a rotary power actuated implement. 
     BACKGROUND OF THE INVENTION 
     Rotary power transmitting or translating coupling devices are known to be adapted for alternative connection and disconnection, such devices commonly including a rotary power input half and a rotary power output half. Such coupler halves are commonly adapted for engagement with each other, and typically have central axes of rotation. Upon interconnection of such halves, it is often necessary that such axes are moved into close axial alignment with each other for vibration and oscillation free co-rotation of the engaged halves. 
     As the halves of such common rotary power transmitting couplers are moved toward each other for engagement for rotary power transmitting use, the needed axial alignment of the halves&#39; axes of rotation commonly does not exist. Instead, such axes often are initially angularly skewed out of alignment with each other. Such common skewing of rotation axes often interferes with proper alignment and attachment of the coupler halves, undesirably interfering with proper engagement of the coupler halves. Upon engagement of the coupler halves, the axes&#39; misalignment may undesirably cause oscillations of the coupler halves during rotary power transmitting operation. 
     The instant inventive rotary power coupler assembly solves or ameliorates the problems, defects, and deficiencies of common connectable and disconnectable rotary power couplers, as described above, by dually incorporating into the coupler&#39;s halves a specially configured pin and socket joint and a circumferential array of specially configured ridge and channel joints. Such specially configured joints operate together, assisting each other in substantially automatically orienting the coupler&#39;s halves in co-axial alignment. 
     BRIEF SUMMARY OF THE INVENTION 
     A first structural component of the instant inventive rotary power coupler assembly comprises an axial coupler half which is suitably milled or cast of steel other durable metal. 
     The assembly&#39;s axial coupler half has an axis of rotation (i.e., a first axis of rotation among the assembly&#39;s other rotary axes), and where the axial coupler half is cylindrically configured, as is preferred, such half&#39;s first rotary axis is preferably centrally oriented with respect to the half&#39;s circular cross sectional shape. 
     A further structural component of the instant inventive rotary power coupler assembly comprises an oppositely axial coupler half which is preferably configured similarly with the axial coupler half, the oppositely axial coupler half suitably being milled of steel and having a matching circular cylindrical shape. In the preferred embodiment, the oppositely axial coupler half has a similarly oriented second rotary axis. 
     A further structural component of the instant inventive rotary power coupler assembly comprises a pin and socket connector in the form of a cone and conic void joint which is operatively connected to or formed wholly as components of the axial and oppositely axial coupler halves. In a preferred embodiment, the cone half of the cone and conic void joint extends oppositely axially from an oppositely axial end or face of the axial coupler half, such extension preferably being along a third rotation axis which substantially coincides with or co-extends with the first rotation axis. Such joint&#39;s conic void half preferably opens axially at an axial end or face of the oppositely axial coupler half, such conic void extending oppositely axially along a fourth rotation axis which substantially co-extends with the second rotation axis. 
     In the preferred embodiment, the cone and conic void components of the cone and conic void joint are closely fitted for mating engagement, such joint halves having vertex angles which substantially match each other. In operation of the inventive coupler, such matching of vertex angles advantageously allows the conic joint halves to perform an automatic axial alignment function during coupler engagement. 
     A further structural component of the instant inventive rotary power coupler assembly comprises a circumferential array of V ridge and V channel joints. In the preferred embodiment, the ridges and joints among such circumferential array are evenly circumferentially spaced. Similarly with the matching vertex angles of the assembly&#39;s cone and conic void joint, the circumferentially arrayed V ridge and V channel joints have matching vertex angles. The matching vertex angles of the V ridge and V channel joints assist or compliment the cone and conic void joint&#39;s automatic coupler half alignment function. 
     During assembly of the instant inventive assembly for rotary power translating use, the cone half of the coupler&#39;s cone and conic void joint may be initially oppositely axially extended so that its vertex or point enters the axial opening of the conic void. In the event of misalignment of the axial and oppositely axial coupler halves&#39; first and second rotation axes, the vertex or point of such cone may advantageously contact a peripheral wall of the conic void, allowing a sliding engagement of such vertex or point therealong to substantially automatically guide the axial coupler half into a proper co-extending alignment with the oppositely axial coupler half. 
     Substantially simultaneously with such coupler half engagement, vertex points of the V ridge and V channel joints enter the V channels perform further axial aligning functions as compliments to and in assistance of the above described axial aligning function of the cone and conical void joint. 
     Upon full nesting receipts of the cone within the conic void and of the V ridges within their V channels, the coupler&#39;s axial and oppositely axial halves are advantageously automatically aligned with each other for proper and oscillation free rotary power translation. Upon performing their alignment assisting functions, the V ridges of the circumferential array of V ridge and V channel joints remain in operative engagement with the V channels for rotary power translation. 
     Accordingly, objects of the instant invention include the provision of a rotary power coupler assembly which incorporates structures, as described above, and which arranges those structures in manners described above for the achievement and performance of beneficial functions described above. 
     Other and further objects, benefits, and advantages of the instant invention will become known to those skilled in the art upon review of the Detailed Description which follows, and upon review of the appended drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a side view of a preferred embodiment of the instant inventive rotary power coupler assembly. 
         FIG. 2  redepicts an axial coupler half component half of the structure of  FIG. 1 . 
         FIG. 3  depicts an oppositely axial coupler half of the structure depicted in  FIG. 1 . 
         FIG. 4  is a sectional view as indicated in  FIG. 2 . 
         FIG. 5  is a sectional view as indicated in  FIG. 3 . 
         FIG. 6  depicts the structure of  FIG. 4  moving into engagement with the structure of  FIG. 5 . 
         FIG. 7  is a magnified view of a portion of the  FIG. 6  structure, as indicated in  FIG. 6 . 
     
    
    
     DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT 
     Referring now to the drawings and in particular to Drawing  FIG. 1 , a preferred embodiment of the instant inventive rotary power coupler assembly is referred to generally by Reference Arrow  1 . The coupler assembly  1  has a circular cylindrical axial coupler half which is referred to generally by Reference Arrow  2 , and has a matching circular cylindrical oppositely axial coupler half which is referred to generally by Reference Arrow  4 . The axial coupler half  2  has a cylindrical body  6 , and the oppositely axial coupler half  4  has a preferably matching cylindrical body  28 . Rotary power input and output shafts  8  and  38  respectively extend to an axial end of the axial body  6  and from an oppositely axial end of the oppositely axial body  28 . 
     An axial end of the rotary power input shaft  8  preferably extends to and communicates with a motor means source of rotary power such as an electric motor or a reciprocating piston internal combustion engine (such motor means not being depicted). An oppositely axial end of the rotary power output shaft  38  preferably extends to and communicates with a rotary powered implement such as a mower, a lawn edger, a garden tiller, or a snow blower (such implements also not being depicted). 
     First and second axes of rotation  24  and  40  preferably extend longitudinally and substantially centrally through the cylindrically figured coupler halves, bodies, and shafts  2 , 6 , 8  and  4 , 28 , 38 . 
     Referring simultaneously to  FIGS. 1-7 , the instant inventive rotary power coupler assembly  1  preferably further comprises a specialized pin and socket connector in the form of a cone and conic void joint  20 , 29 . The cone portion  20  of such joint has a third rotation axis  26 , and such joint&#39;s conic void portion  29  has a fourth rotation axis  35 . In the preferred embodiment, the third rotation axis  26  substantially coincides with or co-extends with the first rotation axis  24 , and the fourth rotation axis  35  substantially coincides or co-extends with the second rotation axis  40 . The cone  20  has an oppositely axially extending vertex  22 , and the conic void  29  similarly has an oppositely axially extended vertex  27 . A first vertex angle “Ac” between diametrically opposed conic wall surfaces  19  and  21  preferably substantially matches a second vertex angle “Av” between diametrically opposed wall surfaces  31  and  33  of the conic void  29 . In the preferred embodiment, such first and second vertex angles “Ac” and “Av” are substantially matching or equal to each other. 
     Referring in particular to  FIGS. 6 and 7 , as the axial coupler half is moved (either mechanically or manually) toward the oppositely axial coupler half, the vertex  22  of cone  20  may enter the axial opening  27  of the conic void  29 . Thereafter, vertex  22  may, as a result in inaccuracies in engaging movements of the coupler halves, impinge against a conic void wall surface (surface  33 , for example) as indicated in  FIG. 7 . Upon such contact, such wall surface  33  effectively drives the cone  20  and its third rotation axis  26  toward the fourth rotation axis  35  of conic void  29 . As such motion of the axial coupler half continues in the direction of the arrows drawn upon  FIG. 6 , vertex  22  may progressively slide in the oppositely axial direction along wall surface  33  until cone  20  nestingly seats within conic void  29 . To facilitate such sliding motion, it is preferred that such conic void wall surface (surfaces  31  and  33  being examples) constitute and function as a substantially flat or linear slide channel floor extending from opening  27  to vertex  22 . Such sliding contact of vertex  22  along surface  33  toward vertex  27  effectively rotates the axial coupler half counter clockwise (according to the view of  FIG. 6 ) with respect to the oppositely axial coupler half, such relative rotation advantageously eliminating any axial skew angle “As” which may arise during the process of coupler half engagement. Accordingly, the cone  20  and conic void  29  components work together to automatically orient the first rotation axis  24 , the second rotation axis  40 , the third rotation axis  26 , and the fourth rotation axis  35  as co-extending lines. 
     Further structural components of the instant inventive rotary power coupler assembly comprise a circumferential array of V ridge and V channel joints, such joints being operatively attached to or milled as components of the axial and oppositely axial coupler halves  2  and  4 . V ridge components  10  of such V ridge and V channel joints have vertexes  14  which extend oppositely axially from an oppositely axial end of the axial coupler half&#39;s body  6 . A corresponding circumferential array of V channels  30  open axially at an axial end of the body  28  of the oppositely axial coupler half  4 , the hollow voids of such channels  30  extending oppositely axially to vertex points  36 . In the preferred embodiment, the V ridge  10  and V channel  30  joints are circumferentially arrayed, and are substantially evenly circumferentially spaced. 
     Simultaneously with the above described nesting receipt by the conic void  29  of the cone  20 , the vertices  14  of the V ridges  10  extend into and are similarly nestingly received within V channels  30 . Third vertex angles of the V ridges  10  (suitably approximately 45°) preferably match the vertex angles of the V channels  30  so that the insertions of the V ridges  10  into the V channels  30  may guide and axially align the coupler halves  2  and  4  in a manner which mechanically assists the automatic axial aligning function of the cone  20  and conic void  29 . Accordingly, the matched and nesting V configurations of the cone  20 , the conic void  29 , the V ridges  10 , and the V channels  30  work together and functionally compliment each other in their performance of the automatic aligning function which advantageously orients the coupler halves to align and co-extend their first  24 , third  26 , second  40 , and fourth 35 rotation axes. 
     In the preferred embodiment, the oppositely axial coupler half&#39;s the conic void  29  and such half&#39;s axially extending teeth  41  (which circumferentially define the V channels  30 ) respectively extend oppositely axially and axially from a floor  43  of an axially opening recess  37  which is formed at the axial end of the oppositely axial coupler half. Correspondingly, the axial half&#39;s V ridges  10  and cone  20  extend oppositely axially from a floor  45  of an oppositely axially opening recess  11  which is formed at the oppositely axial end of the axial coupler half  2 . As shown in  FIG. 4 , the oppositely axial extension of cone  20  substantially exceeds the oppositely axial extensions of the V ridges  10 , such extension differential allowing for simultaneous cone and ridge engagements within the void  29  and within the V channels  30 . 
     In a preferred embodiment, the V ridges  10  and the V channels  30  are configured for maximal translation of rotary power which is exerted in the circumferential direction as indicated by the elliptical arrow drawn upon  FIG. 1 . Upon a reversal of such rotary power, the V ridges  10  preferably become axially extracted from the V channels  30 , resulting in disengagement of the coupler halves  2  and  4 . Accordingly, the inventive coupler facilitates one way power transfer in the circumferential direction. 
     To facilitate circumferential power transfer, the circumferential faces  16  of the V ridges  10  are preferably oriented within or co-extend with first planes which include the first and third rotation axes  24  and  26 . Correspondingly, the oppositely circumferential faces  32  of the V channels  30  are aligned with or co-extend with second planes which include rotation axes  35  and  40 . The opposite faces  18  of the V ridges  10 , and opposite faces  34  of axially extending teeth  41  are preferably angled at approximately 45° with respect to the first and second planes. Such angular orientations assure that, upon a commencement of counter circumferential rotation of the axial coupler half  2  with respect to the oppositely axial coupler half  4 , their angled and abutting faces  18  and  34  together function as slide ramps or planes which drive the coupler halves out of engagement. Accordingly, the instant inventive coupler assembly advantageously facilitates one way or exclusively circumferentially directed power transmission, while disengaging and terminating power transfer at an onset of counter circumferentially directed rotary power. 
     While the principles of the invention have been made clear in the above illustrative embodiment, those skilled in the art may make modifications to the structure, arrangement, portions and components of the invention without departing from those principles. Accordingly, it is intended that the description and drawings be interpreted as illustrative and not in the limiting sense, and that the invention be given a scope commensurate with the appended claims.