Reaction washer

Abstract

The reaction washer (10) may include a crenel portion (18) disposed circumferentially around an outer rim of the reaction washer and a body portion defining an inner diameter that slidably receives an associated threaded element therethrough. The crenel portion may include a plurality of crenel walls (18a, 18b) that cooperate to define an outer diameter of the reaction washer. Further, the body may include first and second sides facing in opposite directions and an inner engagement ring (32) extending from the first side and disposed coaxially between the inner diameter and the crenel portion. The inner engagement ring may include a plurality of serrations (38) each defining a respective serration axis that does not intersect the engagement axis.

Description

Background Technology

[0001] The nut or bolt head can be tightened by a tool, while simultaneously transferring the counteracting torque to a washer beneath the nut or bolt head. This provides a balanced, localized overall torque transfer that is self-centering and does not require manual counteracting of the actuating torque or eccentric support of the tool via a reaction member.

[0002] The reaction washer transmits the received reaction torque to the flange below. The reaction torque is then transmitted from the flange to the threaded element, where it counteracts the actuating torque. To prevent slippage and effectively transmit the reaction torque to the flange, the reaction washer typically employs serrations on its bottom (first side) to engage with the flange. For these serrations to engage, a contact force must be generated during initial tightening, large enough for the given total contact area of ​​the bottom serrations to penetrate into the flange. Only then, when the tool begins to apply torque to the nut and / or bolt head, will the reaction washer not slip and rotate, while retaining itself via concentric reaction mortises on the washer.

[0003] The friction on the top (second side) of the reaction washer must be lower than the friction on the bottom of the reaction washer to prevent the reaction washer from rotating with the nut instead of engaging with the flange during initial manual tightening. Therefore, there is a need for a reaction washer that maximizes engagement on the first side during initial tightening and provides low friction on its top, and secures the nut and / or bolt head after it has been fully tightened.

[0004] Because reaction washers are very convenient for tightening and / or loosening nuts and / or bolt heads, there is a need for reaction washers that can more effectively engage flanges. Summary of the Invention

[0005] In view of the foregoing, a reaction washer may include a circumferentially arranged castellation portion surrounding its outer edge and a body portion defining an inner diameter that slidably receives an associated threaded element passing through it. The castellation portion may include a plurality of castellations that cooperate to define the outer diameter of the reaction washer. Furthermore, the body may include a first and second side facing opposite directions and an inner engagement ring extending from the first side and coaxially arranged between the inner diameter and the castellation portion. The inner engagement ring may include a plurality of serrations, each serration defining a corresponding serration axis that does not intersect with the engagement axis. Attached Figure Description

[0006] Figure 1 This is a top-view view of the reaction washer.

[0007] Figure 2 This is a bottom plan view of the reaction washer.

[0008] Figure 3 This is a partial 3D view of a reaction washer.

[0009] Figure 4 This is a front view of a reaction washer.

[0010] Figure 5 It is a three-dimensional view of a reaction washer with a flange and a nut.

[0011] Figure 6 This is another 3D view of a reaction washer.

[0012] Figure 7A It is a finite element analysis depiction of the reaction washer under load during the initial engagement with the flange.

[0013] Figure 7B It is a finite element analysis depiction of the reaction washer under load when it is fully engaged with the flange.

[0014] Figure 8A It is a finite element analysis depiction of the flange after it is engaged with a conventional reaction washer during initial embedding.

[0015] Figure 8B The flange is depicted by finite element analysis after the reaction washer of this disclosure is engaged during initial embedding.

[0016] Figure 9 It is a three-dimensional view of a reaction washer with a flange and a nut. Detailed Implementation

[0017] Of course, it should be understood that the description and figures herein are illustrative only, and various modifications and changes can be made to the disclosed structure without departing from this disclosure. Referring now to the figures, in which the same reference numerals refer to the same parts throughout the views, the figures schematically depict the reaction washer 10 according to this disclosure.

[0018] Referring to the accompanying drawings, a reaction washer 10 is shown. Specifically, as... Figure 5As shown, the reaction washer 10 can slide onto the free end 12a of the threaded element 12 to engage the mating surface 14a of the flange 14. Furthermore, the nut 16 can thread-engage the threaded element 12 to capture the reaction washer 10 on the threaded element 12 between the nut 16 and the mating surface 14a of the flange 14. Thus, the reaction washer 10 is arranged on the threaded element 12 such that the nut 16 is between the reaction washer 10 and the free end 12a of the threaded element 12 to engage a tool (not shown). As will be described in more detail below, the reaction washer 10 is characterized by preventing rotation about the threaded element 12 by engaging the mating surface 14a of the flange 14, thereby allowing the tool to rotate only the nut 16 while the entire tool does not rotate about the threaded element 12.

[0019] More specifically, the tool can simultaneously and circumferentially engage the nut 16 and the reaction washer 10 by at least partially radially surrounding them (as will be described in more detail below). Thus, the tool can be used to tighten or loosen the nut 16. As will be understood, this means that when the nut 16 is loosened, it will travel along the threaded element 12 away from the flange 14 (or toward the free end 12a), allowing the nut 16 to be removed from the threaded element 12, and when the associated threaded element 12 is tightened, it will travel along the threaded element 12 away from the free end 12a (or toward the mating surface 14a of the flange 14), preventing the nut 16 from being removed from the threaded element 12.

[0020] Continue to refer to Figure 5 and Figures 1-3 The reaction washer 10 may include a chamfered portion 18 arranged circumferentially around the outer edge of the reaction washer 10 and a body portion 20 defining an inner diameter 22 of the reaction washer 10. Therefore, the reaction washer 10 may have a generally circular shape with a nominal thickness. However, it should be understood that other shapes and thicknesses are possible and contemplated without departing from the scope of this disclosure.

[0021] The chamfered portion 18 may include a plurality of chamfered walls 18a, 18b, 18n, which cooperate to define the outer diameter of the reaction washer 10, and the inner diameter 22 of the body portion 20 may slidably receive a threaded element 12 passing through it to define a mating axis 24. Thus, the reaction washer 10 may slidably and coaxially receive the threaded element 12 along the mating axis 24, and the nut 16 may threadably and coaxially receive the threaded element 12 along the mating axis 24. As shown, the reaction washer 10 includes 14 chamfered walls. As illustrated, each of the chamfered walls 18a, 18b has a generally rectangular shape in both plan and front views. However, it should be understood that the reaction washer 10 may include more or fewer chamfered walls, and these chamfered walls may have different shapes, without departing from the scope of this disclosure.

[0022] like Figure 4 As shown, the main body may include a first side 26 and a second side 28. The first side 26 and the second side 28 face opposite directions. Figure 1 As shown, the second side 28 may be generally smooth and planar. The second side 28 is configured to face the nut 16 when mounted on the threaded element 12. However, the second side 28 does not need to be smooth.

[0023] refer to Figure 2 The first side 26 of the reaction washer 10 is shown in more detail. Notably, the reaction washer 10 may include an inner engaging ring 32 extending from the first side 26 and coaxially arranged between the inner diameter 22 and the chamfered portion 18. This extension of the inner engaging ring 32 from the first side 26 may be in a direction away from the second side 28. The reaction washer 10 may also include an outer engaging ring 34 extending from the first side 26 and coaxially arranged between the inner engaging ring 32 and the chamfered portion 18.

[0024] Similar to the inner engagement ring 32, the outer engagement ring 34 can extend from the first side 26 in a direction away from the second side 28. Therefore, the high-friction feature provided by the element on the first side 26 of the reaction washer 10 engages the flange 14 to help prevent rotation of the reaction washer 10 relative to the threaded element 12 or the nut 16. Finally, the outer engagement ring 34 can be radially spaced from the inner engagement ring 32 to define a ring gap 36.

[0025] The inner engagement ring 32 may include a plurality of serrations 38, each serration defining a corresponding serration axis that does not intersect the engagement axis 24, and the outer engagement ring 34 may include a plurality of teeth 42, each tooth defining a corresponding tooth axis that does not intersect the engagement axis 24. Each of the plurality of serrations 38 defines a serration length, and each of the plurality of teeth 42 defines a tooth length. Furthermore, the serration length may be eight to twelve times greater than the aforementioned ring gap 36. More specifically, the serration length may be ten times greater than the ring gap 36.

[0026] Due to the non-intersection of the sawtooth axis and tooth axis with the engagement axis 24, the plurality of sawtooths 38 and the plurality of teeth 42 can be longer than in typical arrangements with other known reaction washers, thereby improving the engagement between the reaction washer 10 and the flange 14. The plurality of sawtooths 38 and the plurality of teeth 42 cooperate to resist rotation of the reaction washer 10 about the engagement axis 24 by engaging the flange 14 to generate a force path around the engagement axis 24 of the mating surface 14a of the flange 14 in a non-orthogonal direction. Due to the aforementioned orientation of the sawtooths 38 and optionally the orientation of the teeth 42, the engagement between the reaction washer 10 and the flange 14 is improved.

[0027] The plurality of serrations 38 may include first serrations 38a and second serrations 38b that are adjacent to each other and separated by first serration grooves 44. When the first side 26 of the reaction washer 10 is viewed in a plan view, the first serration 38a may include a first serration main surface 46, a first serration secondary surface 48, and a first serration peak 52 disposed therebetween. The first serration peak 52 may define the maximum distance between the first serration 38a and the second side 28 in the direction along the engagement axis 24.

[0028] Furthermore, the first serrated main surface 46 can be positioned around the engagement axis 24 along the first rotation direction 40 (for the indication of the first rotation direction, see...). Figure 2 As it travels toward the second sawtooth 38b, it tilts away from the second side 28 and, about the engagement axis 24, along the second rotation direction 50 (for the indication of the second rotation direction, see...). Figure 2 As it travels away from the second sawtooth 38b, it tilts toward the second side 28. For reference, the first rotation direction 40 and the second rotation direction 50 are opposite to each other. This arrangement of the plurality of sawtooth 38 allows for improved engagement between the reaction washer 10 and the flange 14, as will be described in more detail below.

[0029] The first sawtooth 38a may further include a first sawtooth inner surface 54 and a first sawtooth outer surface 56. The first sawtooth inner surface 54 faces the inner diameter 22 and defines the end of the first sawtooth 38a. Conversely, the first sawtooth outer surface 56 faces the outer diameter. However, the first sawtooth outer surface 56 also defines the end of the first sawtooth 38a. The first sawtooth inner surface 54 defines a first sawtooth inner surface plane that is not orthogonal to an imaginary line extending radially from the engagement axis 24 in an orthogonal manner.

[0030] Furthermore, the outer surface 56 of the first sawtooth defines a plane that is not orthogonal to an imaginary line extending radially from the engagement axis 24. Additionally, the plane of the inner surface of the first sawtooth is not parallel to the plane of the outer surface of the first sawtooth. It should be noted that due to the orientation of the inner surface 54 and the outer surface 56 of the first sawtooth relative to the engagement axis 24, more force can be transmitted from the reaction washer 10 to the flange 14, thereby helping to prevent rotation between the reaction washer 10 and the flange 14.

[0031] The second serration 38b may include a second serration main surface 58, a second serration secondary surface 62, and a second serration peak 64 disposed therebetween. The second serration peak 64 defines the maximum distance between the second serration 38b and the second side 28. Furthermore, the distance between the first serration peak 52 and the second side 28 is equal to the distance between the second serration peak 64 and the second side 28.

[0032] The second sawtooth 38b may further include a second sawtooth inner surface 66 facing the inner diameter 22 of the reaction washer 10 and a second sawtooth outer surface 68 facing the outer diameter of the reaction washer 10. The second sawtooth inner surface 66 may define a second sawtooth inner surface plane that is not orthogonal to an imaginary line extending radially from the engagement axis 24 in an orthogonal manner. Furthermore, the second sawtooth outer surface 68 may define a second sawtooth outer surface plane that is not orthogonal to an imaginary line extending radially from the engagement axis 24 in an orthogonal manner. Finally, the corresponding sawtooth axes 38a', 38b' of the first sawtooth 38a and the second sawtooth 38b extend non-parallel to each other between the corresponding inner surfaces 54, 66 and outer surfaces 56, 68.

[0033] Regarding the outer engagement ring 34, the plurality of teeth 42 may include a first tooth 42a and a second tooth 42b adjacent to each other, wherein a first tooth groove 72 is disposed between the first tooth and the second tooth. The first tooth 42a may define a first tooth axis 42a'. The first tooth 42a may include a first tooth inner surface 74 facing the inner engagement ring 32 and a first tooth outer surface 76 facing the outer diameter. Furthermore, the first tooth inner surface 74 and the first tooth outer surface 76 may define the end of the first tooth 42a and be disposed on the first tooth axis 42a'.

[0034] From a plan view, the first tooth 42a may further include a first tooth main surface 78, a first tooth secondary surface 82, and a first tooth crest 84 disposed therebetween. The first tooth crest 84 may define the maximum distance between the first tooth 42a and the second side 28, and the distance between the first tooth crest 84 and the second side 28 is equal to the distance between the second tooth crest 64 and the second side 28. The first tooth main surface 78 may be inclined toward the second side 28 when traveling toward the second tooth 42b about the engagement axis 24 in a first rotational direction 40, and may be inclined away from the second side 28 when traveling away from the second tooth 42b about the engagement axis 24 in a second rotational direction 50. As described above, the first rotational direction 40 and the second rotational direction 50 are opposite to each other. The first tooth groove 72 defines the minimum distance by which the first tooth 42a is offset from the second side 28.

[0035] The second tooth 42b may define a second tooth axis 42b'. Similar to the first tooth 42a, the second tooth 42b may include a second inner tooth surface 86 facing the inner engagement ring 32 so as not parallel to the inner surface 74 of the first tooth, and a second outer tooth surface 88 facing away from the inner engagement ring 32 so as not parallel to the outer surface 76 of the first tooth. Furthermore, the second inner tooth surface 86 and the second outer tooth surface 88 may define the end of the second tooth 42b and are arranged on the second tooth axis 42b'. Additionally, it should be noted that the first tooth axis 42a' and the second tooth axis 42b' are not parallel to each other.

[0036] In a plan view, the second tooth 42b may further include a second tooth main surface 92, a second tooth secondary surface 94, and a second tooth crest 96 disposed therebetween. A first tooth groove 72 separates the first tooth secondary surface 82 from the second tooth main surface 92. Furthermore, the second tooth crest 96 defines the maximum distance between the second tooth 42b and the second side 28. The distance between the first tooth crest 84 and the second side 28 is equal to the distance between the second tooth crest 96 and the second side 28. A second tooth groove 98 defines the minimum distance by which the second tooth 42b is offset from the second side 28. Furthermore, the first tooth crest 84 and the second tooth crest 96 are offset from the second side 28 by equal distances, and the first tooth groove 72 and the second tooth groove 98 are offset from the second side 28 by equal distances.

[0037] The shape and arrangement of the multiple serrations 38 and optionally the multiple teeth 42 provide numerous advantages to the reaction washer 10. As described above, there is an improved engagement between the reaction washer 10 and the flange 14. As an additional benefit, this occurs without negatively impacting the mating surface 14a of the flange 14. As will be understood, this improved engagement provides enhanced locking with the tooling attached to the drive nut 16 and the reaction washer 10.

[0038] Given the advantages mentioned above, Figures 7 and 8 are considered particularly relevant. Figure 7A and Figure 7BThis is a finite element analysis depiction of the reaction washer 10 under load. Specifically, Figure 7A The figure illustrates the stress flow of the reaction washer 10 during initial engagement with the flange 14 (approximately 0.004). Figure 7B The figure illustrates the stress flow of the reaction washer 10 during full engagement with the flange 14. Furthermore, Figure 8A The figure illustrates the stress flow in flange 14 during initial embedment (approximately 0.004") after joining a conventional reaction washer that does not include the unique features described above.

[0039] In comparison, Figure 8B The diagram illustrates the stress flow in flange 14 after engagement of the reaction washer 10 as described above, during initial insertion (approximately 0.004). As is apparent, Figure 8A and Figure 8B The comparison diagram shows the improved reaction washer 10 (which in...) Figure 8B (As shown in the middle figure) Lower stress concentration is provided in flange 14. This is due to the longer engagement length and angled load path on flange 14, which is due to the arrangement of the plurality of serrations 38 of reaction washer 10, and optionally, the arrangement of the plurality of teeth 42.

[0040] refer to Figure 9 The diagram illustrates a threaded attachment assembly 100. The threaded attachment assembly 100 includes a nut 102 and a reaction washer 10, the nut 102 defining an inner diameter and an outer diameter. The reaction washer 10 is rotatably connected to the nut. Furthermore, the outer diameter of the reaction washer 10 is larger than the outer diameter of the nut 102, and the nut 102 is directly connected to the reaction washer to allow independent rotation between the reaction washer 10 and the nut 102. Similar to... Figure 5 , Figure 9 The reaction washer 10 can slide onto the free end 12a of the threaded element 12 to engage the mating surface 14a of the flange 14. However, using the threaded attachment assembly 100, the reaction washer 10 is permanently attached to the nut 102 while still providing rotational independence between the reaction washer 10 and the nut 102. The reaction washer 10 can be attached to the nut 102 in a variety of ways. For example, the nut 102 may include a flared element that extends into the inner diameter of the reaction washer 10 to join the reaction washer 10 and the nut 102 together.

[0041] The reaction gasket has been specifically described above. Modifications and substitutions will be made upon reading and understanding the foregoing detailed description. However, the invention is not limited to the embodiments described above. Rather, the invention is broadly defined by the appended claims and their equivalents.

Claims

1. A reaction washer, comprising: A stack-like portion circumferentially arranged around the outer edge of the reaction washer, wherein the stack-like portion includes a plurality of stack walls cooperating to define the outer diameter of the reaction washer; and The body portion defines an inner diameter that slidably receives an associated threaded element passing through it to define an engagement axis. The body includes a first side and a second side facing opposite directions. The body also includes an inner engagement ring that extends from the first side and is coaxially arranged between the inner diameter and the chamfered portion. The inner engagement ring includes a plurality of serrations, each of which defines a corresponding serration axis that does not intersect the engagement axis.

2. The reaction washer according to claim 1, wherein, The body includes an outer engagement ring extending from the first side and coaxially arranged between the inner engagement ring and the stacked portion, wherein the outer engagement ring includes a plurality of teeth, each of the plurality of teeth defining a corresponding tooth axis that does not intersect the engagement axis.

3. The reaction washer according to claim 2, wherein, The plurality of teeth includes a first tooth defining a first tooth axis and a second tooth defining a second tooth axis, the first tooth and the second tooth being adjacent to each other, the first tooth including a first tooth inner surface facing the inner engagement ring and a first tooth outer surface facing the outer diameter, the second tooth including a second tooth inner surface and a second tooth outer surface, the second tooth inner surface facing the inner engagement ring and not parallel to the first tooth inner surface, and the second tooth outer surface facing away from the inner engagement ring and not parallel to the first tooth outer surface.

4. The reaction washer according to claim 3, wherein, The first tooth inner surface and the first tooth outer surface define the end of the first tooth and are arranged on the first tooth axis, and the second tooth inner surface and the second tooth outer surface define the end of the second tooth and are arranged on the second tooth axis, wherein the first tooth axis and the second tooth axis are not parallel to each other.

5. The reaction washer according to claim 2, wherein, The outer engagement ring and the inner engagement ring are radially spaced apart to define a ring gap.

6. The reaction washer according to claim 5, wherein, Each of the plurality of saw teeth is defined with a saw tooth length, wherein the saw tooth length is eight to twelve times greater than the annular gap.

7. The reaction washer according to claim 5, wherein, Each of the plurality of saw teeth defines a saw tooth length, wherein the saw tooth length is ten times greater than the annular gap.

8. The reaction washer according to claim 1, wherein, The plurality of saw teeth includes a first saw tooth and a second saw tooth that are adjacent to each other and separated by a first saw tooth groove. The first saw tooth includes a first saw tooth main surface and a first saw tooth secondary surface, and a first saw tooth peak is arranged between the first saw tooth main surface and the first saw tooth secondary surface. The second saw tooth includes a second saw tooth main surface and a second saw tooth secondary surface, and a second saw tooth peak is arranged between the second saw tooth main surface and the second saw tooth secondary surface. The first saw tooth groove separates the first saw tooth secondary surface from the second saw tooth main surface.

9. The reaction washer according to claim 8, wherein, The plurality of teeth include a first tooth and a second tooth that are adjacent to each other and separated by a first tooth groove. The first tooth includes a first tooth main surface and a first tooth secondary surface, and a first tooth peak is arranged between the first tooth main surface and the first tooth secondary surface. The second tooth includes a second tooth main surface and a second tooth secondary surface, and a second tooth peak is arranged between the second tooth main surface and the second tooth secondary surface. The first tooth groove separates the first tooth secondary surface from the second tooth main surface.

10. The reaction washer according to claim 9, wherein, The first tooth peak is offset from the second side to define the maximum distance between the first tooth and the second side, and the second tooth peak is offset from the second side to define the maximum distance between the second tooth and the second side, wherein the first tooth groove defines the minimum distance between the first tooth and the second tooth groove, and the second tooth groove defines the minimum distance between the second tooth and the second side, and wherein the first tooth peak and the second tooth peak are offset from the second side by equal distances, and the first tooth groove and the second tooth groove are offset from the second side by equal distances.

11. The reaction washer according to claim 9, wherein, The first sawtooth main surface tilts away from the second side as it travels toward the second sawtooth in a first rotational direction about the engagement axis.

12. The reaction washer according to claim 11, wherein, The first tooth's main surface is inclined toward the second side as it travels toward the second tooth in the first rotational direction around the engagement axis.

13. The reaction washer according to claim 12, wherein, The first tooth main surface is inclined toward the second side as it travels away from the second tooth in a second rotational direction about the engagement axis, and the first tooth main surface is inclined away from the second side as it travels away from the second tooth in the second rotational direction about the engagement axis, wherein the first rotational direction and the second rotational direction are opposite to each other.

14. The reaction washer according to claim 8, wherein, The first sawtooth includes a first sawtooth inner surface facing the inner diameter and a first sawtooth outer surface facing the outer diameter, wherein the first sawtooth inner surface defines a first sawtooth inner surface plane that is not orthogonal to an imaginary line extending radially from the joint axis in an orthogonal manner, and the first sawtooth outer surface defines a first sawtooth outer surface plane that is not orthogonal to the imaginary line extending radially from the joint axis in an orthogonal manner.

15. The reaction washer according to claim 14, wherein, The inner surface plane of the first saw tooth is not parallel to the outer surface plane of the first saw tooth.

16. The reaction washer according to claim 14, wherein, The second sawtooth includes a second sawtooth inner surface facing the inner diameter and a second sawtooth outer surface facing the outer diameter, wherein the second sawtooth inner surface defines a second sawtooth inner surface plane that is not orthogonal to the imaginary line extending radially from the joint axis in an orthogonal manner, and the second sawtooth outer surface defines a second sawtooth outer surface plane that is not orthogonal to the imaginary line extending radially from the joint axis in an orthogonal manner.

17. The reaction washer according to claim 16, wherein, The inner surface of the first saw tooth and the outer surface of the first saw tooth define the end of the first saw tooth, and the inner surface of the second saw tooth and the outer surface of the second saw tooth define the end of the second saw tooth, wherein the respective saw tooth axes extending between the respective inner surface and the outer surface are not parallel to each other.

18. The reaction washer according to claim 1, wherein, The plurality of saw teeth includes a first saw tooth and a second saw tooth that are adjacent to each other and separated by a first saw tooth groove. The first saw tooth includes a first saw tooth peak that defines a maximum distance between the first saw tooth and the second side. The second saw tooth includes a second saw tooth peak that defines a maximum distance between the second saw tooth and the second side. The distance between the first saw tooth peak and the second side is equal to the distance between the second saw tooth peak and the second side.

19. The reaction washer according to claim 18, wherein, The main body includes an outer engagement ring extending from the first side and coaxially arranged between the inner engagement ring and the stacked portion. The outer engagement ring includes a first tooth and a second tooth that are adjacent to each other and separated by a first tooth groove. The first tooth includes a first tooth crest that defines a maximum distance between the first tooth and the second side. The second tooth includes a second tooth crest that defines a maximum distance between the second tooth and the second side. The distance between the first tooth crest and the second side is equal to the distance between the second tooth crest and the second side.

20. The reaction washer according to claim 19, wherein, The distance between the first tooth peak and the second side is equal to the distance between the second tooth peak and the second side.

21. The reaction washer according to claim 2, wherein, The plurality of saw teeth and the plurality of teeth cooperate to resist the rotation of the reaction washer about the engagement axis by engaging the associated flange to form a force path around the engagement axis of the mating surface of the associated flange in a non-orthogonal direction.

22. A threaded attachment assembly, comprising: Nut, the nut defining the inner diameter and the outer diameter of the nut; as well as The reaction washer according to claim 1, wherein the reaction washer is rotatably connected to the nut.

23. The threaded attachment assembly according to claim 22, wherein, The outer diameter of the reaction washer is larger than the outer diameter of the nut, and the nut is directly connected to the reaction washer to allow independent rotation between the reaction washer and the nut.

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