US20230358501A1 - Axle assembly for a bow - Google Patents
Axle assembly for a bow Download PDFInfo
- Publication number
- US20230358501A1 US20230358501A1 US17/740,043 US202217740043A US2023358501A1 US 20230358501 A1 US20230358501 A1 US 20230358501A1 US 202217740043 A US202217740043 A US 202217740043A US 2023358501 A1 US2023358501 A1 US 2023358501A1
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- spacer
- axle
- limbs
- axle shaft
- limb
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 270
- 238000009434 installation Methods 0.000 claims abstract description 44
- 230000014759 maintenance of location Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims 5
- 238000010168 coupling process Methods 0.000 claims 5
- 238000005859 coupling reaction Methods 0.000 claims 5
- 230000013011 mating Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/14—Details of bows; Accessories for arc shooting
- F41B5/1403—Details of bows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/10—Compound bows
- F41B5/105—Cams or pulleys for compound bows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B5/00—Bows; Crossbows
- F41B5/14—Details of bows; Accessories for arc shooting
- F41B5/1442—Accessories for arc or bow shooting
- F41B5/148—Accessories and tools for bow shooting not otherwise provided for
Definitions
- FIGS. 20 - 23 depict another axle assembly 330 in accordance with the principles of the present disclosure that does not include snap-on spacers.
- the axle assembly 330 incudes an axle shaft 40 for rotatably supporting a rotatable member 50 (e.g., a cam or pulley) between first and second limbs 18 , 24 of a bow.
- the rotatable member 50 is adapted to engage a bow string routed about a periphery of the rotatable member 50 as shown at FIG. 1 .
- the rotatable member 50 is rotatably supported on the axle shaft 40 by bearing assembly 72 .
- the limb sleeves 332 , 336 include flanges 337 , 339 that function as spacers for spacing the bearing assembly at a desired position between the limbs 18 , 24 .
- the flanges 337 , 339 can have different axial spacing thicknesses to offset the rotatable member from a centered position between the limbs 18 , 24 .
- a different set of limb sleeves can be used having different axial spacings than the set of limb sleeves 332 , 336 .
Abstract
An axle assembly for a bow. The assembly includes spacers that can be used to adjust the position of a rotatable member axially along an axle that supports the rotatable member. The spacers can each have a snap-on configuration and can be installed and removed from the axle using an installation tool. The rotatable member can be mounted on the axle by a bearing assembly, and the axle assembly can include features for preventing thrust load from being applied to the bearing assembly.
Description
- The present disclosure relates generally to archery equipment. More particularly, the present disclosure relates to axle assemblies for supporting rotatable cams of compound bows.
- Tuning a compound bow is a process in which the bow is very deliberately and specifically set up to maximize performance. Bow tuning takes into account a number of factors including differences from bow to bow resulting from manufacturing tolerances, the basic bow setup (e.g., draw length) including aftermarket accessories mounted to the bow (arrow rest, stabilizers, sight, etc.) and shooter's shooting variables (shooting technique, type of release used, shooter's physical characteristics (e.g., hand size, facial characteristics such as nose eye alignment, etc.))
- One common aspect of tuning a bow includes adjusting the lateral position of a rotatable member such as a cam along the axle that supports the rotatable member. Traditionally, adjusting the lateral position of a rotatable member on its axle is accomplished by adding and removing spacers on either side of the rotatable member. The spacers are typically washer shaped structures that slide over the end of the axle. This tuning process typically involves disassembling the axle assembly, adding and removing spacers onto the axle on either side of the rotatable member and then reassembling the bow. Once reassembled the bow is tested (e.g., paper tuned) and spacers may be further adjusted as needed. This type of bow tuning is iterative, laborious, time intensive and necessitates the use of a specialized equipment.
- One aspect of the present disclosure relates to a system and method for efficiently and easily tuning a bow. More particularly, the system and method relate to an axle assembly including spacers such as snap-on spacers that can be used to adjust the position of a rotatable member such as a cam or pulley axially along an axle shaft that supports the rotatable member. In certain examples, the snap-on spacers can have features that facilitate inserting the spacers onto the axle shaft with a tool and that facilitate removing the spacers from the axle shaft with the tool. In certain examples, the tool can engage the spacers without clamping the spacers. In certain examples, the spacers can be elongate along lengths of the spacers, and the tool can engage tool interface ends of the spacers that are opposite from snap-on portions of the spacers. In certain examples, when mounted on the axle shaft, each spacer can be configured to oppose a portion (e.g., a limb) of the bow to prevent the spacers from rotating on the axle shaft. In certain examples, the spacers can be mounted on the axle shaft with open sides of the spacers facing away from a sight line of the bow to reduce the likelihood of the spacers disengaging from the axle shaft during shooting. The system and method of the present disclosure avoids the need to disassemble the bow or axle assembly to add or remove spacers. In the depicted embodiments, the spacers of the system and method can be inserted and removed without access to either of the distal ends of the axle shaft.
- Another aspect of the present disclosure relates to an axle assembly for a bow. The axle assembly is configured to limit an amount first and second limbs of the bow can be drawn together during assembly of the axle assembly with respect to the bow. In certain examples, the configuration prevents thrust loading from being applied to a bearing which supports a rotatable member (e.g., a cam or pulley) on an axle shaft of the axle assembly or limits that amount of thrust load applied. In certain examples, the axle assembly establishes a pre-determined spacing between the first and second limbs when the axle assembly is fully tightened. In one example, the configuration includes limb sleeves that interact with the axle shaft and the first and second limbs to limit an amount first and second limbs of the bow can be drawn together during assembly of the axle assembly with respect to the bow. In another example, the configuration includes snap-on stops (e.g., clips) that snap within grooves defined by the axle shaft to limit an amount first and second limbs of the bow can be drawn together during assembly of the axle assembly with respect to the bow.
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FIG. 1 is a side view of an embodiment of an archery bow according to the principles of the present disclosure; -
FIG. 2 is an exploded assembly view of a portion of the bow ofFIG. 1 ; -
FIG. 3 is an end view of a portion of the bow ofFIG. 1 ; -
FIG. 4 is a cross sectional view of the structure depicted inFIG. 3 ; -
FIG. 5 is an isometric view of a portion of the bow ofFIG. 1 ; -
FIG. 6 is a isometric view of a spacer of the bow ofFIG. 1 ; -
FIG. 7 is a cross sectional view of an alternative embodiment in accordance with the principles of the present disclosure; -
FIG. 8 is an exploded assembly view of the embodiment ofFIG. 7 ; -
FIG. 9 is an isometric view of the embodiment ofFIG. 7 ; -
FIG. 10 is an end view of another alternative embodiment in accordance with the principles of the present disclosure; -
FIG. 11 is an exploded assembly view of the embodiment ofFIG. 10 ; -
FIG. 12 is an isometric view of the embodiment ofFIG. 10 ; -
FIG. 13 is an isometric view of a spacer and spacer installation tool in a first position according to one embodiment of the bow tuning system of the present disclosure; -
FIG. 14 is an isometric view of the spacer and spacer installation tool ofFIG. 13 in a second position; -
FIG. 15 is an isometric view of the spacer and spacer installation tool ofFIG. 13 in a third position; -
FIG. 16 is an end view of the spacer and spacer installation tool ofFIG. 13 in the third position; -
FIG. 17 is an end view of the spacer and spacer installation tool ofFIG. 13 in a fourth position; -
FIG. 18 is a perspective view of a spacer kit in accordance with the principles of the present disclosure; -
FIG. 19 is a view comparing the spacing thicknesses of the spacers of the spacer kit ofFIG. 18 ; -
FIG. 20 is a perspective view of another axle assembly in accordance with the principles of the present disclosure for supporting a rotatable member of a bow; -
FIG. 21 is an end view of the axle assembly ofFIG. 20 ; -
FIG. 22 is an exploded view of the axle assembly ofFIG. 20 ; and -
FIG. 23 is a cross-sectional view of the axle assembly ofFIG. 20 . - Referring to the
FIGS. 1-6 , the present disclosure provides an embodiment of anarchery bow 10 according to the principles of the present disclosure. Thebow 10 includes ariser 12 that includes afirst end portion 14 and asecond end portion 16. The bow includes afirst limb arrangement 17 including afirst limb 18 and asecond limb 24. Thefirst limb 18 includes afirst end portion 20 and asecond end portion 22. Thefirst end portion 20 of thefirst limb 18 is connected to thefirst end portion 14 of theriser 12. Thesecond limb 24 includes afirst end portion 26 and asecond end portion 28. Thefirst end portion 26 of thesecond limb 24 is connected to thefirst end portion 14 of theriser 12. It should be appreciated that alternative configurations are also possible (e.g., forked limb configurations). - In the depicted embodiment, the
bow 10 includes afirst axle assembly 30 including afirst limb sleeve 32 received in anaperture 34 in thesecond end portion 22 of thefirst limb 18. Thebow 10 includes asecond limb sleeve 36 received in anaperture 38 in thesecond end portion 28 of thesecond limb 24. It should be appreciated that alternative configurations are also possible. Some alternative embodiments will be discussed in further detail below. - Referring to
FIGS. 2 and 4 , thefirst axle assembly 30 of thebow 10 includes anaxle shaft 40. Theaxle shaft 40 includes a first threadedend portion 42 and a second threadedend portion 44. The threadedend portions axle shaft 40. The first threadedend portion 42 is received in thefirst limb sleeve 32 and the second threadedend portion 44 is received in thesecond limb sleeve 36. In the depicted embodiment, a first threaded fastener 46 (e.g., a screw) extends though thefirst limb sleeve 32 and is engaged with threads in the first threadedend portion 42 of theaxle shaft 40. A second threaded fastener 48 (e.g., a screw) extends though thesecond limb sleeve 36 and is engaged with thread in the second threadedend portion 44 of theaxle shaft 40.Heads 43 of the threadedfasteners lateral sides 33, 35 (e.g., left and right lateral outer sides as shown atFIG. 4 ) of thelimbs limbs members axle shaft 40. The outerlateral sides axis 53 of theaxle shaft 40. It should be appreciated that alternative configurations are also possible. - In the depicted embodiment, a first
rotatable member 50 is supported for rotation on theaxle shaft 40. In the depicted embodiment afirst spacer member 52 is secured to the axle shaft located between the firstrotatable member 50 and thefirst limb 18. Asecond spacer member 54 is secured to theaxle shaft 40 located between the firstrotatable member 50 and thesecond limb 24. In the depicted embodiment the first andsecond spacers first axle shaft 40 while theaxle shaft 40 is secured to thefirst limb 18 andsecond limb 24. - Referring to
FIG. 1 , thebow 10 includes asecond limb assembly 19 to which a secondrotatable member 70 is secured by a second axle assembly. Thesecond limb assembly 19 can be secured to thesecond end portion 16 of theriser 12. It will be appreciated that thesecond limb assembly 19, the secondrotatable member 70 and the second axle assembly can have the same configuration as thefirst limb assembly 17, the firstrotatable member 50 and the first axle assembly. However, thesecond limb assembly 19, the secondrotatable member 70 and the second axle assembly are symmetrically arranged with respect to thefirst limb assembly 17, the firstrotatable member 50 and the first axle assembly generally about a horizontal plane that bisects the bow. To avoid redundancy, detailed descriptions of thesecond limb assembly 19, the secondrotatable member 70 and the second axle assembly are not separately provided. It should be appreciated that in other examples the first and second axle assemblies could be different from each other. In the depicted embodiment firstrotatable member 50 is a cam and the secondrotatable member 70 is also a cam. Therotatable members bow string 71 routed about therotatable members - In the depicted example, the first and second
rotatable members axle shaft 40 for the first rotatable member 50) by a bearing assembly 72 (seeFIG. 4 ). Referring toFIG. 4 , the bearingassembly 72 defines an axial dimension A1 measured along an axis of its corresponding axle shaft (e.g., theaxis 53 ofaxle shaft 40, as depicted). - In the depicted embodiment, a spacing adjustment kit 200 (see
FIG. 18 ) can be used to set therotatable member 50 at a desired axial position between innerlateral sides limbs lateral sides kit 200 can include a number of spacer members that share the same configuration but differ in effective thickness. For example, thefirst spacer member 52 and thesecond spacer member 54 have the same basic construction, but different effective thicknesses. It will be appreciated that additional spacers having different effective thicknesses can also be provided in a kit. The spacer members can be used in sets with different sets being configured to position therotatable members rotatable members - Referring to
FIG. 18 , thekit 200 includes atool 112 for installing the spacers on theaxle shaft 40 and for removing the spacers from theaxle shaft 40. Thespacer kit 200 includes a plurality of spacers having different effective spacing thicknesses. The spacers include: a first set of spacers including afirst spacer 52 a and asecond spacer 54 a; a second set of spacers including afirst spacer 52 b and asecond spacer 54 b; and a third set of spacers including afirst spacer 52 c and asecond spacer 54 c. The first and second spacers of each set of spacers can be mounted on theaxle shaft 40 interchangeably at the left or right side of the bearingassembly 72 depending on whether is desired to offset therotatable members limbs spacers spacer 54 a has a spacing thickness T6. The spacer set 52 a, 54 a provides a maximum spacing difference between thespacers spacer 52 b has a spacing thickness T2 and its corresponding pairedspacer 54 b has a spacing thickness T5. The spacer set 52 b, 54 b provides an intermediate spacing difference between thespacers spacer 52 c has a spacing thickness T3 and its corresponding pairedspacer 54 c has a spacing thickness T4. The spacer set 52 c, 54 c provides a minimum spacing difference between thespacers limb sleeves assembly 72 when the axle assembly is fully tightened. In the depicted example, the spacing thickness T1 ofspacer 52 a equals 0.06 inches and the spacing thickness T6 of the pairedspacer 54 a equals 0.16 inches for a total spacing of 0.22 inches and an axial offset distance of 0.1 inches. In the depicted example, the spacing thickness T2 ofspacer 52 b equals 0.08 inches and the spacing thickness T5 of the pairedspacer 54 b equals 0.14 inches for a total spacing of 0.22 inches and an axial offset distance of 0.06 inches. In the depicted example, the spacing thickness T3 ofspacer 52 c equals 0.1 inches and the spacing thickness T4 of the pairedspacer 54 c equals 0.12 inches for a total spacing of 0.22 inches and an axial offset distance of 0.2 inches. Of course, the numerical values provided are examples and can be varied. It will be appreciated that first andsecond spacers FIGS. 2-4 correspond to spacer set 52 b, 54 b. - In certain examples, spacer members in accordance with the principles of the present disclosure can have a molded plastic construction such as a molded Nylon construction. In other examples, other materials can be used to construct the spacers.
- It will be appreciated that aside from the differences in thicknesses T1-T6, spacers in accordance with the present disclosure can have similar structure features. Hence, for the purposes of this disclosure, such features will only be described with respect to the
spacer member 52. - Referring to
FIG. 6 , thespacer member 52 includes afirst end portion 90. Thefirst end portion 90 of thespacer member 52 includes a spacer snap-onportion 92 that defines the spacing thickness T2. The snap-onportion 92 includes opposed first and secondaxle retention arms pocket 97 for receiving theaxle shaft 40. In the depicted embodiment, the opposedaxle retention arms gap 95 having a gap distance D1. In the depicted embodiment, the distance D1 is smaller than an outer diameter D2 (seeFIG. 4 ) of thefirst axle shaft 40. In the depicted embodiment, the first andsecond arms first spacer member 52 and thefirst axle shaft 40. In the depicted embodiment, the first andsecond arms spacer member 52 is driven radially into engagement with theaxle shaft 40 until the first andsecond arms axle shaft 40. When the snap-onportion 92 is pushed radially against the outer surface of theaxle shaft 40, angled surfaces 93 at the distal ends of thearms arms gap 95 to allow passage of theaxle shaft 40 through thegap 95 and into thepocket 97. Once theaxle shaft 40 passes through thegap 95, thearms axle shaft 40 within thepocket 97. Thus, thespacer member 52 can be installed on theaxle shaft 40 by radially inserting thespacer member 52 onto theaxle shaft 40 thereby snapping thespacer member 52 onto theaxle shaft 40. Thespacer member 52 can be removed from theaxle shaft 40 by pulling thespacer member 52 away from theaxle shaft 40 in an outward radial direction causing thearms gap 95 to a size where the axle shaft can pass through thegap 95. Once theshaft 40 passes through the gap, thearms - In the depicted embodiment the
first spacer member 52 includes asecond end portion 94 connected to thefirst end portion 90. Thespacer member 52 is elongate along a spacer length L that extends between the first andsecond end portions spacer 52 measured at the snap-on portion. The width W is transverse with respect to the length and thickness of the spacer. The snap-on portion is defined at thefirst end portion 90 and atool interface portion 99 is defined at thesecond end portion 94. - The
tool interface portion 99 extends from the snap-onportion 92 in a direction along the length L of thespacer member 52 and has an axial thickness A2 that is thicker than the axial thickness T2 of the snap-onportion 92. When thespacer member 52 is mounted on theaxle shaft 40, the axial thickness A2 as well as the thickness T2 are parallel to theaxis 53 of theaxle shaft 40 and therefore can be referred to as axial dimensions. - The
tool interface portion 99 is adapted to couple with thetool 112 and can also be configured for preventing thespacer 52 from rotating about theaxle shaft 40 relative to thelimbs tool interface portion 99 can include an anti-rotation structure 84 (e.g., a shoulder, flat or other surface) for opposing a corresponding surface 88 (seeFIG. 4 ) of an adjacent one of the limbs (e.g., limb 18) to prevent thespacer member 52 from rotating relative to theaxle shaft 40. Theanti-rotation structure 84 can include a surface 85 that extends in the axial orientation and is adapted to oppose thesurface 88 when theaxle assembly 30 is assembled with respect to the bow. In one example, thesurface 88 faces toward abow sight line 41 that extends through a central region of the bow. As so mounted, the open side of the spacer 52 (i.e., the side defining the gap 95) faces away from thesight line 41. Similarly, the surface 85 faces away from thesight line 41. Upon release of the bow string during a shot, thelimbs sight line 41 and then rapidly decelerate to a stop. Hence, it is preferred for thespacer member 52 to be mounted such that thegap 95 faces away from the sight line 41 (upwardly in the case of the spacers used to space thelimbs first limb assembly 17; downwardly in the case of the spacers used to space the limbs of the second limb assembly 19) such that upon rapid deceleration of thelimbs pocket 97 is forced against theshaft 40 by inertia of thespacer member 52 such that contact between theaxle shaft 40 and the closed end of thepocket 97 prevents thespacer member 52 from unintentionally disengaging from theaxle shaft 40. Opposition between the surface 85 of theanti-rotation feature 84 and thesurface 88 of thelimb 18 provides a similar spacer retention function. - In one example, the
limb sleeves axle shaft 40 and the first andsecond limbs second limbs fasteners limb sleeves axle shaft 40 and the first andsecond limbs limbs spacers limb sleeves axle shaft 40 and the first andsecond limbs limbs assembly 72 and inner ends of thelimb sleeves spacers limb sleeves axle shaft 40 and the first andsecond limbs limbs assembly 72 upon installation of thespacers - The
limb sleeves main sleeve body 105 having an axialinner end 101 and an axialouter end 103. Themain sleeve body 105 can define a cylindrical outer surface and a cylindrical passage that extends between the inner andouter ends main sleeve bodies 105 are received within theapertures limbs limb sleeves shaft axis 53 of theaxle shaft 40 withopposite ends 107 of theaxle shaft 40 being received within thelimb sleeves fasteners limb sleeves axle shaft 40. Theheads 43 of the threadedfasteners lateral sides limbs fasteners ends 107 of theaxle shaft 107, thelimbs lateral sides limbs limb sleeves first stop 100 that opposes a corresponding one of the opposite ends 107 of theaxle shaft 40. Thelimb sleeves second stop 104 that opposes an innerlateral side second limbs second stops 104 are defined by radial outer flanges (e.g., annular flanges) that project radially outwardly frommain sleeve bodies 105 of thelimb sleeves stops 104 function as spacers between the first andsecond limbs assembly 72. In one example, thefirst stops 100 are defined by radial inner flanges (e.g., annular flanges) that project radially inwardly from themain sleeve bodies 105 adjacent the axial outer ends 103 of themain sleeve bodies 105. - In one example, upon tightening of the threaded
fasteners axle shaft 40 bottom out in thelimb sleeves first stops 100 such that thelimbs limb sleeves sleeves ends 107 of theshaft 40 from contacting theheads 43 of the threadedfasteners limb sleeves axle shaft 40 relative to the first andsecond limbs lateral sides second limbs axle shaft 40 does not exceed a predetermined spacing during tightening of thefasteners limb sleeves ends 107 of theshaft 40 and theheads 43 of thefasteners limb sleeves limb sleeves spacers assembly 72. Theaxle assembly 30, by virtue of the interaction of thelimb sleeves axle shaft 40 and thelimbs limbs axle assembly 30 with respect to the bow. In certain examples, the configuration prevents thrust loading from being applied to thebearing 72 which supports the rotatable member 50 (e.g., a cam or pulley) on theaxle shaft 40 of theaxle assembly 30 or limits that amount of thrust load applied. In certain examples, theaxle assembly 30 establishes a pre-determined axial spacing (i.e., a spacing measured along the axle shaft 40) between the first andsecond limbs - Referring to
FIGS. 7-9 , an alternative embodiment of the structure shown inFIGS. 2-5 is described herein in further detail. In the depicted embodiment anaxle shaft 118 includes a throughbore 120 that is configured to receive a threadedrod 122 that is configured to engage a first nut 124 (e.g., a cap nut) at a first end and a second nut 126 (e.g., a cap nut) at a second end. - The structure of the depicted embodiment is otherwise similar to the structure previously described and illustrated in
FIGS. 2-6 . It should be appreciated that alternative configurations are possible.Limb sleeves amount limbs - Referring to
FIGS. 10-12 , an alternative embodiment of the structure shown inFIGS. 2-5 is described herein in further detail. In the depicted embodiment stops such as spring clips 130, 132 are used to limit an amount the limbs can be drawn together along anaxle shaft 134. In the depicted embodiment the spring clips 130, 132 engagegrooves 133 in theaxle shaft 134 on opposite sides of the bearingassembly 72 and function as stops for preventing the limbs from translating towards the center of theaxle shaft 134 beyond the stops whenfasteners axle shaft 134. Thus, theclips assembly 72 byspacers axle shaft 134 betweenclips assembly 72. In this configuration, the sleeves described above and shown inFIGS. 2-9 are not used. It should be appreciated that alternative configurations are possible. - Referring to
FIGS. 13-17 , thespacer 52 is configured to be inserted radially onto theaxle shaft 40 and pulled radially from theaxle shaft 40 using thetool 112. Thetool 112 is configured to apply a pushing force through the length of thespacer 52 to snap thespacer 52 radially onto theaxle shaft 40. Thetool 112 is also configured to apply a pulling force through the length of thespacer 52 for disengaging thespacer 52 from theaxle shaft 40. The tool includes atool body 220 having a tool length that extends between first and second ends 222, 224. Ahandle 226 is provided at thefirst end 222 and apocket 228 is defined at thesecond end 224. In the depicted embodiment, the second end portion 94 (e.g., thetool interface portion 99 of the spacer 52) includes a spacer installation tool engagement interface. In the depicted embodiment the spacer installation tool engagement interface includes an aperture 108 (seeFIG. 6 ) that is configured to receive aboss 110 within thepocket 228 of thespacer installation tool 112. Theaperture 108 has a length that is parallel to theaxis 53 of theaxle shaft 40 when thespacer 52 is mounted on theaxle shaft 40 and therefore can be referred to as an axial direction. Thetool interface portion 99 also includes an outer shape (e.g., a curved end) that matches a shape of thepocket 228. Thesecond end portion 94 of the spacer is loaded into thepocket 228 and over theboss 110 by inserting thespacer 52 into thepocket 228 in a direction transverse with respect to the length of the tool body 220 (i.e., an axial direction). During insertion, theboss 110 is received in theaperture 108 in an axial direction. Similarly, thetool 112 can be disengaged from thespacer 52 after snapping thespacer 52 over theaxle shaft 40 by translating thetool 112 in an axial direction such theboss 110 slides axially out of theaperture 108 and thesecond end portion 94 slides axially out of thepocket 228. - The
spacer installation tool 112 is configured to hold thespacer member 52 and transfer a radial force on thespacer member 52 to facilitate the installation and removal of thespacer 52 with respect to theaxle shaft 40. In the depicted embodiment thespacer installation tool 112 releases from thespacer member 52 when the tool is translated from thespacer member 52 in a direction along theaperture 108 andboss 110. In use, this direction is parallel to an axis of theaxle shaft 40 and can be referred to as an axial direction. The spacer installation tool of the depicted embodiment facilitates the installation and removal of the spacers as it enables the person tuning the bow to impart a large amount of force on the spacers in a controlled manner. The handle of the installation tool is large and ergonomic and the engagement between the installation tool and the spacer is one that the degrees of freedom of the spacer is constrained when engaged with the tool, yet the spacer can easily be release from the tool. In a preferred example, thetool 112 does not apply clamping force to the spacers during use. Instead, the spacers slide into a complementary structure defined by the tool. It should be appreciated that other configurations are also possible. In use, the snap-on portions of the spacers are located outside thepocket 228 of thetool 112 such that the tool does not interfere with deflection of theelastic arms tool 112 when engaged with thetool 112. -
FIGS. 20-23 depict anotheraxle assembly 330 in accordance with the principles of the present disclosure that does not include snap-on spacers. Theaxle assembly 330 incudes anaxle shaft 40 for rotatably supporting a rotatable member 50 (e.g., a cam or pulley) between first andsecond limbs rotatable member 50 is adapted to engage a bow string routed about a periphery of therotatable member 50 as shown atFIG. 1 . Therotatable member 50 is rotatably supported on theaxle shaft 40 by bearingassembly 72. Ends of theaxle shaft 40 fit within a set oflimb sleeves apertures limbs limb sleeves flanges limbs flanges limbs rotatable member 50, a different set of limb sleeves can be used having different axial spacings than the set oflimb sleeves limb sleeves limb sleeves stops 341 that oppose ends of theshaft 40 such that thesleeves axle shaft 40 and the first andsecond limbs second limbs fasteners - As discussed above, the present disclosure also provides a method of tuning a bow. In one embodiment the method includes the step of providing a first spacer member that includes a first end portion and a second end portion, the first end portion of the spacer member including a spacer body portion that defines a first spacing thickness, the first end portion including opposed axle retention arms that extend from the spacer body portion, the opposed axle retention arms including distal ends that define one opening that is smaller than a diameter of an axle shaft, wherein the axle retention arms are configured to elastically deflect and snap over the axle shaft when driven with force into engagement with the axle shaft.
- The method can also include the step of providing a spacer installation tool that is configured to engage the second end portion of the first spacer.
- The method of the present disclosure can also include the step of engaging the first spacer with the spacer installation tool and using the tool to drive the spacer into engagement with the axle shaft, wherein the step of driving the spacer into engagement of the axle shaft includes applying a radial force on the spacer that causes the axle retention arms to deflect and snap over the axle shaft.
- The method according to some embodiments of the present disclosure may also include the step of disengaging the spacer installation tool from the spacer by sliding the spacer installation tool in an axial direction relative to the spacer.
- The method according to some embodiments of the present disclosure may also include the step of selecting a second spacer that has a different spacing size relative to the first spacer.
- The method according to some embodiments of the present disclosure includes the step of installing the first spacer. The step is accomplished without disassembling the bow while both ends of the axle remain secured to the limbs of the bow.
- In should be appreciated the above description is not meant to be limiting. The above description relates to several embodiments of the invention. Many other embodiments are possible.
Claims (28)
1. A spacer kit for an archery bow having a rotatable member rotatably supported on an axle that extends between a pair of limbs of the bow, the spacer kit comprising:
a first and second spacer each including:
a spacer member having first end portion and a second end portion, the spacer member being elongate along a length that extends between the first and second end portions, the first end portion including a snap-on portion, the snap-on portion including opposed axle retention arms including free ends that define an opening that is smaller than a diameter of the axle, the axle retention arms being configured to elastically deflect and snap over the axle when driven radially into engagement with the axle, and the second end portion defining a tool interface portion for coupling with an installation tool;
the snap-on portion of the spacer member of the first spacer having a first spacing thickness and the snap-on portion of the spacer member of the second spacer having a second spacing thickness different than the first spacing thickness.
2. The spacer kit of claim 1 , wherein the second end portion of each spacer member includes a shoulder configured to engage one of the limbs to limit rotation of the spacer member.
3-6. (canceled)
7. The spacer kit of claim 1 , further comprising a first limb sleeve and a second limb sleeve, each of the first and second limb sleeves having an aperture configured to receive opposite ends of the axle, wherein each of the first and second limb sleeves includes an outward surface configured to engage apertures in the pair of limbs, wherein each of the first and second limb sleeves includes a first end with an inwardly extending radial flange and a second end including an outwardly extending radial flange, wherein the inwardly extending radial flanges abut the opposite ends of the axle and the outwardly extending radial flange abut inner side surfaces of the pair of limbs.
8. The spacer kit of claim 1 , further comprising third and fourth spacers respectively having third and fourth spacing thicknesses that are different from each other and that are different from the first and second spacing thicknesses, wherein a sum of the first and second spacing thicknesses equals a sum of the third and fourth spacing thicknesses.
9. The spacer kit of claim 1 , wherein the first and second spacers are configured such that the openings defined by the retention arms face away from a sight line of the bow when the first and second spacers are mounted on the axle.
10. An archery bow comprising:
a riser:
a first and second limbs coupled with the riser;
a rotatable member;
an axle assembly including:
an axle shaft that extends between the first and second limbs along a shaft axis, the rotatable member being supported on the axle shaft by a bearing assembly;
a first spacer secured to the axle shaft between the bearing assembly and the first limb; and
a second spacer secured to the axle shaft between the bearing assembly and the second limb, the first and second spacers each having a snap-on construction for allowing the first and second spacers to be radially snapped onto the axle shaft;
wherein the first and second spacers have anti-rotation features to prevent rotation of the first and second spacers about the axle shaft relative to the first and second limbs, wherein the anti-rotation feature of the first spacer opposes a portion of the first limb and the anti-rotation feature of the second spacer opposes a portion of the second limb.
11. The archery bow of claim 10 , wherein the anti-rotation features include shoulders.
12. The archery bow of claim 10 , wherein the first and second spacers each have a first end portion and a second end portion, the first and second spacers being elongate along lengths that extend between the first and second end portions, the first end portions including snap-on portions, the snap-on portions including opposed axle retention arms including free ends that define an opening that is smaller than a diameter of the axle shaft, the axle retention arms being configured to elastically deflect and snap over the axle shaft when driven radially into engagement with the axle shaft, and the second end portion defining a tool interface portion for coupling with an installation tool.
13. The archery bow of claim 12 , wherein the first and second spacers are mounted on the axle shaft such that the openings face away from a sight line of the bow.
14. (canceled)
15. The archery bow of claim 10 , further comprising limb sleeves received in apertures defined by the first and second limbs, the limb sleeves being aligned along the shaft axis with the opposite ends of the axle shaft being received within the limb sleeves, the limb sleeves each including a first stop that opposes a corresponding one of the opposite ends of the axle shaft, the limb sleeves also each including a second stop that opposes an inner side of a corresponding one of the first and second limbs.
16. The archery bow of claim 10 , further comprising axial stop clips snapped within grooves defined by the axle shaft, the axial stop clips including a first axial stop clip positioned between the first spacer and the first limb and a second axial stop clip positioned between the second spacer and the second limb.
17. The archery bow of claim 10 , further comprising a rod that extends axially though the axle shaft and through the first and second limbs, the rod having threaded ends that project beyond the first and second limbs, wherein nuts are threaded on the threaded ends to draw the first and second limbs together.
18. An archery bow comprising:
a riser:
a first and second limbs coupled with the riser;
a rotatable member;
an axle assembly including:
an axle shaft that extends between the first and second limbs along a shaft axis, the axle shaft having opposite ends, the rotatable member being supported on the axle shaft by a bearing assembly;
limb sleeves received in apertures defined by the first and second limbs, the limb sleeves being aligned along the shaft axis with the opposite ends of the axle shaft being received within the limb sleeves, the limb sleeves each including a first stop that opposes a corresponding one of the opposite ends of the axle shaft, the limb sleeves also each including a second stop that opposes an inner side of a corresponding one of the first and second limbs; and
a threaded fastening arrangement for securing the axle shaft to the first and second limbs, the threaded fastening arrangement including threaded fasteners located at outer sides of the first and second limbs that are turned to draw the first and second limbs toward each other, wherein the limb sleeves interact with the axle shaft and the first and second limbs to limit an amount the first and second limbs can be drawn together.
19. The archery bow of claim 18 , wherein the second stops are defined by outer flanges that project radially outwardly from main sleeve bodies of the limb sleeves.
20. The archery bow of claim 19 , wherein the outer flanges function as spacers between the first and second limbs and the bearing assembly.
21. The archery bow of claim 19 , wherein the first stops are defined by inner flanges that project radially inwardly from the main sleeve bodies.
22. The archery bow of claim 18 , further comprising snap-on spacers that mount on the axle shaft between the outer flanges of the limb sleeves and the bearing assembly, the snap-on spacers being radially installable on and radially removeable from the axle shaft.
23. An archery bow comprising:
a riser:
a first and second limbs coupled with the riser;
a rotatable member;
an axle assembly including:
an axle shaft that extends between the first and second limbs along a shaft axis, the axle shaft having opposite ends, the rotatable member being supported on the axle shaft by a bearing assembly;
stop clips snapped within grooves defined by the axle shaft on opposite sides of the bearing assembly to limit an amount the first and second limbs can be drawn together;
spacers positioned on the axle shaft on opposite sides of the bearing assembly between the stop clips and the bearing assembly; and
a threaded fastening arrangement for securing the axle shaft to the first and second limbs, the threaded fastening arrangement including threaded fasteners located at outer sides of the first and second limbs that are turned to draw the first and second limbs toward each other.
24. A method of installing a spacer on an axle of a bow, the spacer including a first end portion and a second end portion, the first end portion of the spacer defining a first spacing thickness, the first end portion including opposed axle retention arms, the opposed axle retention arms including distal ends that define an opening that is smaller than a diameter of the axle, wherein the axle retention arms are configured to elastically deflect and snap over the axle when the spacer is driven radially onto the axle, the second end portion of the spacer defining a tool engagement portion including an axial aperture adapted to receive a boss of an installation tool, the method comprising:
mating the second end portion of the spacer with a spacer installation tool, wherein the first end portion protrudes from the spacer installation tool when the spacer is mated with the spacer installation tool; and
using the spacer installation tool to drive the spacer radially onto the axle.
25. The method of claim 24 , further comprising the step of disengaging the spacer installation tool from the spacer while the spacer remains on the axle by sliding the spacer installation tool relative to the spacer in an axial direction along the axle.
26. A spacer kit for an archery bow having a rotatable member rotatably supported on an axle that extends between a pair of limbs of the bow, the spacer kit comprising:
a first and second spacer each including:
a spacer member having first end portion and a second end portion, the spacer member being elongate along a length that extends between the first and second end portions, the first end portion including a snap-on portion, the snap-on portion including opposed axle retention arms including free ends that define an opening that is smaller than a diameter of the axle, the axle retention arms being configured to elastically deflect and snap over the axle when driven radially into engagement with the axle, and the second end portion defining a tool interface portion for coupling with an installation tool;
the snap-on portion of the spacer member of the first spacer having a first spacing thickness and the snap-on portion of the spacer member of the second spacer having a second spacing thickness different than the first spacing thickness; and
the tool interface portion of each spacer member including an axial aperture adapted to receive a boss of the installation tool.
27. The spacer kit of claim 26 , further comprising the installation tool, wherein the boss is located within a pocket of the installation tool which is configured for receiving the second end portion of each spacer member.
28. A spacer kit for an archery bow having a rotatable member rotatably supported on an axle that extends between a pair of limbs of the bow, the spacer kit comprising:
a first and second spacer each including:
a spacer member having first end portion and a second end portion, the spacer member being elongate along a length that extends between the first and second end portions, the first end portion including a snap-on portion, the snap-on portion including opposed axle retention arms including free ends that define an opening that is smaller than a diameter of the axle, the axle retention arms being configured to elastically deflect and snap over the axle when driven radially into engagement with the axle, and the second end portion defining a tool interface portion for coupling with an installation tool;
the snap-on portion of the spacer member of the first spacer having a first spacing thickness and the snap-on portion of the spacer member of the second spacer having a second spacing thickness different than the first spacing thickness; and
the installation tool, wherein the installation tool is configured to retain each spacer member and transfer a radial force through each spacer member to facilitate the installation and removal of each spacer member with respect to the axle, and wherein the installation tool releases from each spacer member when the installation tool is translated from spacer members in a direction along the axle.
29. The spacer kit of claim 28 , wherein the installation tool does not clamp the spacer members during installation or removal of the spacer members with respect to the axle.
30. An archery bow comprising:
a riser:
a first and second limbs coupled with the riser;
a rotatable member; and
an axle assembly including:
an axle shaft that extends between the first and second limbs along a shaft axis, the rotatable member being supported on the axle shaft by a bearing assembly;
a first spacer secured to the axle shaft between the bearing assembly and the first limb; and
a second spacer secured to the axle shaft between the bearing assembly and the second limb, the first and second spacers each having a snap-on construction for allowing the first and second spacers to be radially snapped onto the axle shaft;
wherein the first and second spacers have anti-rotation features to prevent rotation of the first and second spacers about the axle shaft relative to the first and second limbs, wherein the anti-rotation feature of the first spacer opposes a portion of the first limb and the anti-rotation feature of the second spacer opposes a portion of the second limb;
wherein the first and second spacers each have a first end portion and a second end portion, the first and second spacers being elongate along lengths that extend between the first and second end portions, the first end portions including snap-on portions, the snap-on portions including opposed axle retention arms including free ends that define an opening that is smaller than a diameter of the axle shaft, the axle retention arms being configured to elastically deflect and snap over the axle shaft when driven radially into engagement with the axle shaft, and the second end portion defining a tool interface portion for coupling with an installation tool; and
wherein the tool interface portions define axial apertures for receiving a boss of the installation tool.
31. The archery bow of claim 11 , wherein surfaces of the shoulders of the anti-rotation features extend in the axial orientation and are adapted to oppose surfaces of the limbs.
Priority Applications (1)
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US17/740,043 US11821708B1 (en) | 2022-05-09 | 2022-05-09 | Axle assembly for a bow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US17/740,043 US11821708B1 (en) | 2022-05-09 | 2022-05-09 | Axle assembly for a bow |
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US20230358501A1 true US20230358501A1 (en) | 2023-11-09 |
US11821708B1 US11821708B1 (en) | 2023-11-21 |
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US17/740,043 Active US11821708B1 (en) | 2022-05-09 | 2022-05-09 | Axle assembly for a bow |
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US11821708B1 (en) | 2023-11-21 |
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