Lock washer and fastening assembly

Abstract

This utility model relates to the field of mechanical connection technology and discloses an anti-loosening washer and fastening assembly. The anti-loosening washer body has a through hole extending along its own axial direction and at least two helical holes. The at least two helical holes are distributed circumferentially along the washer body and have the same direction of rotation. Each helical hole extends radially through the outer peripheral wall of the washer body and the inner peripheral wall of the through hole. Each helical hole does not extend axially to the axial end face of the washer body. The orthographic projection of all helical holes along the axial direction of the washer body onto a preset plane forms a closed ring. The orthographic projections of any two adjacent helical holes along the axial direction of the washer body onto the preset plane partially overlap, and the central angle of the orthographic projection of each helical hole along the axial direction of the washer body onto the preset plane is less than 360°. This anti-loosening washer has a good anti-loosening effect, effectively preventing scratches or even damage to fasteners and / or connected parts, and also effectively preventing a decrease in the fastening capacity of the fasteners.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection technology, and in particular to anti-loosening washers and fastening components. Background Technology

[0002] Anti-loosening washers are an essential component in fastening connections. They are typically sandwiched between the head of fasteners such as bolts or screws and the connected parts to prevent the fasteners from loosening under conditions such as vibration.

[0003] Currently, the most commonly used anti-loosening washers in related technologies are spring washers. Spring washers are annular with notches. When subjected to compression force, spring washers can undergo elastic deformation and be flattened to provide anti-loosening force. However, the anti-loosening force provided by spring washers is limited, and they are prone to scratching fasteners and / or connected parts during the flattening process. Furthermore, scratching fasteners will lead to a decrease in the fastening ability of the fasteners. Utility Model Content

[0004] The purpose of this invention is to provide anti-loosening washers and fastening components to solve the aforementioned problems of anti-loosening washers in related technologies.

[0005] An anti-loosening washer includes a washer body, the washer body having a through hole extending along its own axial direction and at least two helical holes, the at least two helical holes being distributed circumferentially along the washer body and having the same direction of rotation, each helical hole extending radially through the outer peripheral wall of the washer body and the inner peripheral wall of the through hole, and each helical hole not extending axially to the axial end face of the washer body;

[0006] All the spiral holes projected onto the preset plane along the axial direction of the washer body form a closed ring. The projections of any two adjacent spiral holes onto the preset plane along the axial direction of the washer body partially overlap, and the central angle of the projection of each spiral hole onto the preset plane along the axial direction of the washer body is less than 360°. The preset plane is perpendicular to the axial direction of the washer body.

[0007] As an alternative to the aforementioned anti-loosening washer, the central angle of the orthographic projection of each of the spiral holes onto the preset plane along the axial direction of the washer body is equal, and all the spiral holes are evenly distributed along the circumference of the washer body.

[0008] As an alternative to the aforementioned anti-loosening washer, the two axial end faces of the washer body are parallel.

[0009] As an alternative to the aforementioned anti-loosening washer, both axial end faces of the washer body are perpendicular to the axis of the washer body.

[0010] As an alternative to the aforementioned anti-loosening washer, the two axial end faces of the washer body completely overlap on the orthographic projection of the washer body onto the preset plane along the axial direction of the washer body.

[0011] As an alternative to the aforementioned anti-loosening washer, when the washer body is unfolded into a planar structure, the spiral hole is waist-shaped.

[0012] As an alternative to the aforementioned anti-loosening washer, the washer body is a one-piece molded part.

[0013] As an alternative to the aforementioned anti-loosening washer, the washer body is made of spring steel.

[0014] The fastening assembly includes a fastener, and the fastening assembly further includes the aforementioned anti-loosening washer. The fastener passes through the through hole and is threadedly connected to the connected part. The two axial end faces of the washer body abut against the head of the fastener and the connected part in a corresponding manner.

[0015] As an alternative to the above-mentioned fastening assembly, the screwing direction of the fastener is opposite to the screwing direction of the helical hole.

[0016] Beneficial effects:

[0017] This utility model provides an anti-loosening washer, which includes a washer body. The washer body has a through hole extending along its own axial direction and at least two helical holes. The at least two helical holes are distributed circumferentially along the washer body and have the same direction of rotation. Each helical hole extends radially through the outer peripheral wall of the washer body and the inner peripheral wall of the through hole. Each helical hole does not extend axially to the axial end face of the washer body. The orthographic projection of all helical holes along the axial direction of the washer body onto a preset plane is a closed ring. The orthographic projections of any two adjacent helical holes along the axial direction of the washer body onto the preset plane partially overlap, and the central angle of the orthographic projection of each helical hole along the axial direction of the washer body onto the preset plane is less than 360°. The preset plane is perpendicular to the axial direction of the washer body.

[0018] By setting all the spiral holes to form a closed ring on a preset plane along the axial direction of the washer body, and the partial orthogonal projections of any two adjacent spiral holes along the axial direction of the washer body on the preset plane coincide, and the central angle of the orthogonal projection of each spiral hole along the axial direction of the washer body on the preset plane is less than 360°, when an axial force is applied to the washer body, the portion of the washer body corresponding to the overlapping area of ​​the orthogonal projections of any two adjacent spiral holes along the axial direction of the washer body on the preset plane can undergo elastic deformation, causing the two axial end faces of the washer body to move closer to each other, and the washer body stores elastic restoring force, so that the washer body can achieve the effect of preventing loosening of the fastener; since there are at least two spiral holes, and at least two spiral holes are distributed along the circumference of the washer body, the elastic restoring force that the washer body can store is multiplied compared to the use of a single elastic washer in related technologies, so the anti-loosening effect is also multiplied.

[0019] Secondly, by providing at least two spiral holes distributed circumferentially along the washer body with the same spiral direction, each spiral hole penetrates the outer peripheral wall of the washer body and the inner peripheral wall of the through hole radially along the washer body, and each spiral hole does not penetrate to the axial end face of the washer body axially. It can be understood that the two axial end faces of the washer body are both annular and continuous surfaces. Therefore, compared with the spring washers in related technologies, it can effectively avoid the washer body scratching or even damaging the fastener and / or the connected parts, thereby effectively avoiding the problem of reduced fastener tightening ability caused by scratching the fastener.

[0020] Therefore, the anti-loosening washer has a good anti-loosening effect, which can effectively prevent scratches or even damage to fasteners and / or connected parts, and can also effectively prevent the problem of reduced fastener tightening ability caused by scratches on fasteners.

[0021] This utility model also provides a fastening assembly, including a fastener and the aforementioned anti-loosening washer. The fastener passes through a through hole and is threadedly connected to the connected component. The two axial end faces of the washer body abut against the head of the fastener and the connected component respectively. This effectively improves the anti-loosening effect of the fastener and effectively avoids damage to the fastener and / or the connected component. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the anti-loosening washer from a first perspective in an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the anti-loosening washer from a second perspective in an embodiment of this utility model;

[0024] Figure 3 This is a structural schematic diagram of the anti-loosening washer from a third-angle perspective in an embodiment of this utility model.

[0025] In the picture:

[0026] 1. Washer body; 11. Spiral hole; 12. Through hole; 13. Axial end face. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] Currently, the most commonly used anti-loosening washers in related technologies are spring washers. Spring washers are annular with notches. When subjected to compression force, spring washers can undergo elastic deformation and be flattened to provide anti-loosening force. However, the anti-loosening force provided by spring washers is limited, and they are prone to scratching fasteners and / or connected parts during the flattening process. Furthermore, scratching fasteners will lead to a decrease in the fastening ability of the fasteners.

[0032] Taking bolts as an example of fasteners, based on a large number of previous tests, it was found that the axial force required for a spring washer to be flattened is usually several hundred Newtons to one or two thousand Newtons, while the preload of the bolt is several tens of thousands of Newtons to one or two thousand Newtons. The axial force required for the spring washer to be flattened is much lower than the preload of the bolt. Therefore, the anti-loosening force provided by the spring washer to the bolt is quite limited.

[0033] This utility model provides an anti-loosening washer, such as Figure 1-3 As shown, the anti-loosening washer includes a washer body 1. The washer body 1 has a through hole 12 extending along its own axial direction and at least two spiral holes 11 extending along its own axial direction. The at least two spiral holes 11 are distributed circumferentially along the washer body 1 and have the same spiral direction. Each spiral hole 11 extends radially through the outer peripheral wall of the washer body 1 and the inner peripheral wall of the through hole 12. Each spiral hole 11 does not extend axially to the axial end face 13 of the washer body 1. The orthographic projection of all spiral holes 11 along the axial direction of the washer body 1 onto a preset plane is a closed ring. The orthographic projections of any two adjacent spiral holes 11 along the axial direction of the washer body 1 onto the preset plane partially overlap. The central angle of the orthographic projection of each spiral hole 11 along the axial direction of the washer body 1 onto the preset plane is less than 360°. The preset plane is perpendicular to the axial direction of the washer body 1.

[0034] By setting all the spiral holes 11 to form a closed ring on a preset plane along the axial direction of the washer body 1, and the orthogonal projections of any two adjacent spiral holes 11 along the axial direction of the washer body 1 on the preset plane partially overlap, and the central angle of the orthogonal projection of each spiral hole 11 along the axial direction of the washer body 1 on the preset plane is less than 360°, when an axial force is applied to the washer body 1, the preset portion on the washer body 1 undergoes elastic deformation, causing the two axial end faces 13 of the washer body 1 to approach each other, and the washer body 1 stores elastic restoring force, so that the washer body 1 can achieve the effect of preventing loosening of the fastener. The preset portion is the part between the overlapping areas of the orthogonal projections of any two adjacent spiral holes 11 along the axial direction of the washer body 1 on the preset plane. Since there are at least two spiral holes 11, and at least two spiral holes 11 are distributed circumferentially along the washer body 1, the elastic restoring force that the washer body 1 can store is multiplied compared to the use of a single elastic washer in related technologies, thereby multiplying the anti-loosening effect.

[0035] Secondly, by providing at least two spiral holes 11 distributed circumferentially along the washer body 1 with the same spiral direction, each spiral hole 11 penetrates the outer peripheral wall of the washer body 1 and the inner peripheral wall of the through hole 12 radially along the washer body 1, and each spiral hole 11 does not penetrate to the axial end face 13 of the washer body 1 axially, it can be understood that the two axial end faces 13 of the washer body 1 are both annular and continuous surfaces. Therefore, compared with the spring washers in the related art, it can effectively avoid the washer body 1 from scratching or even damaging the fastener and / or the connected parts, thereby effectively avoiding the problem of reduced fastening capacity of the fastener caused by scratching the fastener.

[0036] Therefore, the anti-loosening washer has a good anti-loosening effect, which can effectively prevent scratches or even damage to fasteners and / or connected parts, and can also effectively prevent the problem of reduced fastener tightening ability caused by scratches on fasteners.

[0037] It is understandable that the number of spiral holes 11, the spiral angle of the spiral holes 11, and the central angle of the overlapping portion of the orthographic projections of any two adjacent spiral holes 11 along the axial direction of the washer body 1 onto a preset plane are all factors affecting the anti-loosening capability of the washer body 1. The number of spiral holes 11, the spiral angle of the spiral holes 11, and the central angle of the overlapping portion of the orthographic projections of any two adjacent spiral holes 11 along the axial direction of the washer body 1 onto a preset plane can be adaptively adjusted according to the actual anti-loosening capability requirements.

[0038] Optionally, such as Figure 1 and Figure 2 As shown, the central angles of the orthographic projections of each spiral hole 11 along the axial direction of the washer body 1 onto the preset plane are all equal, and all spiral holes 11 are evenly distributed along the circumference of the washer body 1. It can be understood that this arrangement ensures that the central angles of the overlapping portions of the orthographic projections of any two adjacent spiral holes 11 along the axial direction of the washer body 1 onto the preset plane are all equal. This allows the washer body 1 to undergo approximately uniform elastic deformation when an axial force is applied, thereby further improving the anti-loosening effect of the washer body 1 and effectively extending its service life.

[0039] In this embodiment, as Figure 1 and Figure 2 As shown, four spiral holes 11 are exemplarily arranged to be evenly distributed along the circumference of the washer body 1, and the central angles of the orthographic projections of the four spiral holes 11 along the axial direction of the washer body 1 onto a preset plane are all equal.

[0040] In other embodiments, the central angle of the overlapping portion of the orthographic projection of at least one pair of adjacent spiral holes 11 along the axial direction of the washer body 1 onto a preset plane can be adapted to meet actual working conditions. The central angle of the overlapping portion of the orthographic projection of any two adjacent spiral holes 11 along the axial direction of the washer body 1 onto a preset plane can be the second central angle. The first central angle and the second central angle are not equal.

[0041] Optionally, in this embodiment, as Figure 1-3 As shown, the two axial end faces 13 of the washer body 1 are parallel. When the washer body 1, the fastener, and the connected parts are connected as a whole, and the surface of the connected parts with the recessed threaded hole is a plane perpendicular to the axis of the washer body 1, this arrangement maximizes the contact area between the washer body 1 and the connected parts, and also maximizes the contact area between the washer body 1 and the fastener, which can further improve the working performance and service life of the washer body 1; secondly, it can effectively improve the aesthetics of the formed fastening assembly.

[0042] In other embodiments, the two axial end faces 13 of the washer body 1 may be set at an angle according to actual working conditions. Specifically, it can be understood that the angle between the two axial end faces 13 of the washer body 1 does not include the two axial end faces 13 of the washer body 1 being perpendicular.

[0043] Further, optionally, in this embodiment, such as Figure 1-3 As shown, both axial end faces 13 of the washer body 1 are perpendicular to the axis of the washer body 1. It can be understood that both axial end faces 13 of the washer body 1 are planes. When the washer body 1, fastener, and connected component are connected as a whole, and the surface of the connected component with the recessed threaded hole is a plane perpendicular to the axis of the washer body 1, this further improves the anti-loosening effect and service life, and also facilitates processing.

[0044] In other embodiments, the two axial end faces 13 of the washer body 1 may be set at an angle to the axis of the washer body 1 according to the actual working conditions. Specifically, it can be understood that the two axial end faces 13 of the washer body 1 being set at an angle to the axis of the washer body 1 does not include the two axial end faces 13 of the washer body 1 being perpendicular to the axis of the washer body 1.

[0045] Further, optionally, in this embodiment, such as Figure 1-3 As shown, the two axial end faces 13 of the washer body 1 completely overlap on the preset plane along the axial direction of the washer body 1. In this embodiment, the washer body 1 is a hollow cylinder. This design facilitates the processing of the washer body 1 while ensuring its working performance.

[0046] Further, optionally, in this embodiment, such as Figure 1 and Figure 2 As shown, when the washer body 1 is unfolded into a planar structure, the spiral hole 11 is waist-shaped. This facilitates the machining of the spiral hole 11 and effectively ensures that the pre-set portion on the washer body 1 can undergo good elastic deformation.

[0047] In other embodiments, the spiral hole 11 may be rectangular when the washer body 1 is unfolded into a planar structure, depending on the actual working conditions.

[0048] Specifically, in this embodiment, the washer body 1 is a one-piece molded part. This reduces the number of parts while ensuring the structural strength of the washer body 1. Furthermore, the one-piece molding method is injection molding or machining milling, etc.

[0049] Specifically, the washer body 1 is made of spring steel. Spring steel has good strength, elasticity, and fatigue resistance. It is understood that a specific type of spring steel can be selected to manufacture the washer body 1 according to the actual working conditions.

[0050] This utility model also provides a fastening assembly, including a fastener and the aforementioned anti-loosening washer. The fastener passes through the through hole 12 and is threadedly connected to the connected part. The two axial end faces 13 of the washer body 1 correspond one-to-one with the head of the fastener and the connected part. This effectively improves the anti-loosening effect of the fastener and effectively avoids damage to the fastener and / or the connected part. Specifically, the fastener is a bolt or screw, etc.

[0051] Specifically, the tightening direction of the fastener is opposite to the rotation direction of the helical hole 11. It is understood that, depending on actual working conditions, the tightening direction of the fastener can be adaptively set to clockwise and the rotation direction of the helical hole 11 to counterclockwise, or the tightening direction of the fastener can be set to counterclockwise and the rotation direction of the helical hole 11 to clockwise. More specifically, such as... Figure 1-3 As shown, taking the fastener's screwing direction as counterclockwise and the screw hole 11's screwing direction as clockwise as an example, during the process of screwing the fastener counterclockwise onto the connected part, the preset part on the washer body 1 can undergo elastic deformation, causing the preset part on the washer body 1 to have a tendency to spring back in the counterclockwise direction, which is the same as the screwing direction of the fastener, thereby achieving the effect of preventing the fastener from loosening.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An anti-loosening washer, characterized in that, The device includes a washer body (1), which has a through hole (12) extending along its own axial direction and at least two spiral holes (11). The at least two spiral holes (11) are distributed circumferentially along the washer body (1) and have the same spiral direction. Each spiral hole (11) extends radially through the outer peripheral wall of the washer body (1) and the inner peripheral wall of the through hole (12). Each spiral hole (11) does not extend axially to the axial end face (13) of the washer body (1). All the spiral holes (11) are projected in a closed ring shape on a preset plane along the axial direction of the washer body (1). The projections of any two adjacent spiral holes (11) on the preset plane along the axial direction of the washer body (1) partially overlap. The central angle of the projection of each spiral hole (11) on the preset plane along the axial direction of the washer body (1) is less than 360°. The preset plane is perpendicular to the axial direction of the washer body (1).

2. The anti-loosening washer according to claim 1, characterized in that, The central angles of the orthographic projections of each of the spiral holes (11) onto the preset plane along the axial direction of the washer body (1) are all equal, and all the spiral holes (11) are evenly distributed along the circumference of the washer body (1).

3. The anti-loosening washer according to any one of claims 1-2, characterized in that, The two axial end faces (13) of the washer body (1) are parallel.

4. The anti-loosening washer according to any one of claims 1-2, characterized in that, Both axial end faces (13) of the washer body (1) are perpendicular to the axis of the washer body (1).

5. The anti-loosening washer according to any one of claims 1-2, characterized in that, The two axial end faces (13) of the washer body (1) are completely coincident on the orthographic projection of the washer body (1) onto the preset plane along the axial direction of the washer body (1).

6. The anti-loosening washer according to any one of claims 1-2, characterized in that, When the washer body (1) is unfolded into a planar structure, the spiral hole (11) is waist-shaped.

7. The anti-loosening washer according to any one of claims 1-2, characterized in that, The washer body (1) is a one-piece molded part.

8. The anti-loosening washer according to any one of claims 1-2, characterized in that, The washer body (1) is made of spring steel.

9. A fastening assembly, including fasteners, characterized in that, The fastening assembly further includes the anti-loosening washer as described in any one of claims 1-8, wherein the fastener passes through the through hole (12) and is threadedly connected to the connected part, and the two axial end faces (13) of the washer body (1) abut against the head of the fastener and the connected part in a one-to-one correspondence.

10. The fastening assembly according to claim 9, characterized in that, The fastener is turned in the opposite direction to the spiral hole (11).

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