Long-service-life anti-loose fastener
By designing a strip groove and a sliding top part on the outer wall of the bolt to prevent loosening, the problem of bolt connection loosening due to vibration is solved, achieving the anti-loosening effect and improving the operating accuracy and safety of the equipment.
Patent Information
- Application Number
- CN202520430005.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing bolted connections in mechanical equipment are prone to loosening due to vibration and impact, affecting the accuracy and stability of equipment operation, and may even lead to safety accidents.
Design a long-life anti-loosening fastener, including opening a strip groove along the axial direction on the outer wall of the bolt, and setting a top member and an elastic rod on the bolt. The top member slides in the annular groove to prevent loosening through friction and resistance.
It effectively prevents bolt connections from loosening, improves the operating accuracy and stability of mechanical equipment, and reduces the risk of equipment failure.
Smart Images
Figure CN223825420U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the field of anti-loosening fastener technology, and more specifically, to a long-life anti-loosening fastener. Background Technology
[0002] In the field of mechanical engineering, bolted connections are a common and widely used method of connection in various mechanical equipment and structures. Due to their advantages such as convenient installation and easy disassembly, bolted connections have become the preferred connection method in many engineering scenarios.
[0003] However, in practical use, bolted connections face a pressing problem: loosening. Because mechanical equipment inevitably experiences vibrations, impacts, and other external forces during operation, these forces can gradually loosen initially tight bolt connections. Once bolt connections loosen, it not only affects the operational accuracy and stability of the mechanical equipment and reduces its efficiency, but in severe cases, it can also lead to equipment malfunctions or even safety accidents.
[0004] To address the issue of loose bolt connections, various anti-loosening fasteners exist. One particularly effective type is the pin-type locking nut, which, after being tightened to the appropriate position, uses a pin inserted into the slot between the locking nut and bolt to prevent the locking nut from rotating and loosening. However, this method requires a proper fit to the slot position, which can lead to issues of insufficient or excessive tightening when rotating the locking nut.
[0005] Therefore, developing an anti-loosening fastener that can effectively solve the above problems and has good anti-loosening performance is of great necessity in the field of mechanical engineering. Utility Model Content
[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a long-life anti-loosening fastener, which solves the technical problem that anti-loosening fasteners in the related art are difficult to lock into the appropriate position.
[0007] According to one aspect, at least one embodiment of this disclosure provides a long-life anti-loosening fastener for threaded connection to the outside of a bolt, wherein a groove is formed along its axial direction on the outer wall of the bolt, comprising:
[0008] The main body has a through hole, an annular groove is formed on the inner wall of the through hole, and an internal thread is formed on the inner wall of the through hole, with the internal thread located on one side of the annular groove;
[0009] A top member is slidably disposed within the annular groove. The top member has a top that is used for sliding and pressing against the strip groove.
[0010] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener, wherein the top member includes:
[0011] The slider is slidably disposed within the annular groove;
[0012] An elastic rod has one end mounted on the slider and the other end is a free end, with the free end forming the top.
[0013] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener.
[0014] The elastic rod is inclined along the direction of the central axis of the through hole.
[0015] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener.
[0016] The slider is ring-shaped.
[0017] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener.
[0018] The inner wall of the through hole also has an annular connecting groove, one end of which communicates with the annular sliding groove, and the other end of which passes through one end of the through hole. The annular connecting groove is used to allow the slider to enter the annular sliding groove; it also includes:
[0019] A stop is provided in the annular connecting groove, and the stop is used to block the slider.
[0020] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener.
[0021] The inner wall of the annular connecting groove has an annular slot;
[0022] The stop is a retaining ring, which is engaged in the annular groove.
[0023] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener.
[0024] The main body also has a threaded hole, which communicates with the annular groove; and further includes:
[0025] A locking screw, threaded within the threaded hole, is used to tighten the slider.
[0026] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener, wherein the top member further includes:
[0027] Anti-slip protrusions are provided on the top.
[0028] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener.
[0029] The anti-slip protrusions are strip-shaped and arranged in parallel.
[0030] For example, at least one embodiment of this disclosure provides a long-life anti-loosening fastener.
[0031] The annular groove is located near one end of the through hole.
[0032] The beneficial effects of the embodiments disclosed herein are as follows:
[0033] In this disclosure, the top member is slidably disposed within an annular groove, and its top can slide and press against the strip groove of the bolt. When the fastener is installed on the bolt, the main body can rotate about the central axis of the bolt while moving axially along the bolt. During this process, the top of the top member engages with the strip groove of the bolt, and this engagement effectively restricts the axial movement of the top member on the bolt. When an external force (such as vibration, axial tension, etc.) exists that could loosen the fastener, the top of the top member will generate friction and resistance within the strip groove, preventing the main body from moving along the axial direction of the bolt, thereby achieving the anti-loosening function. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0035] Figure 1 This is a schematic diagram of the three-dimensional structure of the present disclosure. Figure 1 ;
[0036] Figure 2 This is a schematic diagram of the three-dimensional structure of the present disclosure. Figure 2 ;
[0037] Figure 3 For this disclosure Figure 2 A magnified schematic diagram of part A in the middle;
[0038] Figure 4 This is a schematic diagram of the main view structure of this disclosure;
[0039] Figure 5 For this disclosure Figure 4 Schematic diagram of the BB section structure;
[0040] Figure 6 This is a schematic diagram of the exploded structure disclosed herein;
[0041] Figure 7 This is a schematic diagram of the cross-sectional structure under the explosive state of this disclosure;
[0042] Figure 8 This is a schematic diagram of the usage state structure of this disclosure.
[0043] In the diagram: 1-bolt, 11-slot, 2-body, 21-through hole, 22-annular groove, 23-annular connecting groove, 24-stop, 25-annular groove, 26-threaded hole, 3-top piece, 31-slider, 32-elastic rod, 33-anti-slip protrusion, 34-top, 4-locking screw. Detailed Implementation
[0044] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0045] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0046] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0047] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0048] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.
[0049] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0050] like Figures 1-8 As shown, a long-life anti-loosening fastener according to an embodiment of the present disclosure is provided for threaded connection to the outside of a bolt 1. A strip groove 11 is provided on the outer wall of the bolt 1 along its axial direction. The fastener includes a body 2 and a top member 3. The body 2 has a through hole 21. An annular groove 22 is provided on the inner wall of the through hole 21. An internal thread is provided on the inner wall of the through hole 21. The internal thread is located on one side of the annular groove 22. The top member 3 is slidably disposed in the annular groove 22. The top member 3 has a top 34, which is used for sliding and pressing against the strip groove 11.
[0051] The top piece 3 is slidably disposed within the annular groove 22, and its top 34 can slide and press against the strip groove 11 of the bolt 1. When the fastener is installed on the bolt 1, the main body 2 can rotate about the central axis of the bolt 1 while moving axially along the bolt 1. During this process, the top 34 of the top piece 3 cooperates with the strip groove 11 of the bolt 1, and this cooperation effectively restricts the axial movement of the top piece 3 on the bolt 1. When there is an external force that could loosen the fastener (such as vibration, axial tension, etc.), the top 34 of the top piece 3 will generate friction and resistance within the strip groove 11, preventing the main body 2 from moving along the axial direction of the bolt 1, thereby achieving the function of preventing loosening.
[0052] In some examples, the top member 3 includes a slider 31 and an elastic rod 32. The slider 31 is slidably disposed in the annular groove 22; one end of the elastic rod 32 is disposed on the slider 31, and the other end is a free end, with the free end of the elastic rod 32 forming the top 34.
[0053] For example, such as Figure 2 and Figure 8 As shown, the top part 3 is composed of a slider 31 and an elastic rod 32. The slider 31 can slide in the annular groove 22, ensuring that when the top part 3 is confined in the strip groove 11, the main body 2 can rotate and move about the central axis of the bolt 1.
[0054] One end of the elastic rod 32 is fixed to the slider 31, and the other end is a free end forming a top 34. The elastic properties of the elastic rod 32 are key to this design. When the fastener is installed on the bolt 1, the elastic rod 32 will deform and bend, allowing the elastic rod 32 to move smoothly into the locked state within the slot 11 while the fastener moves to lock. When the fastener reaches the locked position, the elastic rod 32, being in an inclined state, will provide support and prevent the fastener from loosening.
[0055] In some examples, the elastic rod 32 is inclined along the axial direction of the through hole 21.
[0056] For example, such as Figure 5 As shown, the inclined design of the elastic rod 32 has several advantages. Firstly, when the fastener is installed onto the bolt 1, the inclined direction of the elastic rod 32 is away from the bolt 1. This makes it easier for the elastic rod 32 to bend and move when subjected to the force of the slot 11, facilitating installation. Secondly, when the fastener is in the locked state, since the elastic rod 32 is inclined towards the direction of loosening the fastener, it will be supported within the slot 11 when the fastener is loosened, thus better preventing loosening.
[0057] In some examples, slider 31 is circular.
[0058] For example, such as Figure 6 As shown, the slider 31 is designed as a ring, matching the shape of the annular groove 22. This matching relationship makes the sliding of the slider 31 within the annular groove 22 smoother and more stable. Since all parts of the annular slider can make uniform contact with the inner wall of the annular groove 22, the slider 31 will not experience excessive local force or jamming during the sliding process, ensuring the stability of the top part's movement.
[0059] In some examples, the inner wall of the through hole 21 also has an annular connecting groove 23, one end of which is connected to the annular sliding groove 22, and the other end of which passes through one end of the through hole 21. The annular connecting groove 23 is used to allow the slider 31 to enter the annular sliding groove 22. It also includes a stop 24, which is disposed in the annular connecting groove 23 and is used to block the slider 31.
[0060] For example, such as Figure 6 and Figure 7 As shown, the annular connecting groove 23 on the inner wall of the through hole 21 provides a convenient channel for the installation of the slider 31. During assembly, the slider 31 can easily enter the annular groove through the annular connecting groove 23 without the need for complex installation processes or tools. This design greatly simplifies the installation process of the top component, improves production efficiency, and reduces assembly costs.
[0061] When the slider 31 enters the annular groove 22, the stop 24 can effectively block the slider 31, keeping it in the annular groove 22 for normal operation.
[0062] In some examples, an annular groove 25 is provided on the inner wall of the annular connecting groove 23; the stop 24 is a retaining spring, which is engaged in the annular groove 25.
[0063] For example, such as Figure 5 and Figure 6 As shown, the annular groove 25 on the inner wall of the annular connecting groove 23, in conjunction with the retaining spring, is an ingenious design. The retaining spring, acting as a stop 24, possesses good elasticity and a certain degree of strength. Installing the retaining spring within the annular groove 25 is simple and quick; after deforming the retaining spring and inserting it into the annular groove 25, the spring will return to its original shape due to its elasticity, firmly locking itself within the groove and effectively blocking the slider 31. Simultaneously, this installation method of the retaining spring also facilitates disassembly and replacement. When maintenance or replacement of the top component 3 is required, the slider 31 can be easily removed using simple tools.
[0064] In some examples, the main body 2 also has a threaded hole 26, which communicates with the annular groove 22; it also includes a locking screw 4, which is threaded in the threaded hole 26 and is used to tighten the slider 31.
[0065] For example, such as Figure 5 and Figure 6 As shown, the threaded hole 26 on the main body 2 is connected to the annular slide groove 22. After the fastener has completed the fastening operation, the locking screw 4 is rotated to tighten the annular slider, which can restrict the annular slider from rotating in the annular slide groove 22. This is equivalent to the top part 3 and the main body 2 forming a whole. Since the elastic rod 32 is stuck in the strip groove 11, it will better prevent the fastener from loosening.
[0066] In some examples, the top part 3 also includes an anti-slip protrusion 33, which is disposed on the top 34.
[0067] For example, such as Figure 3 As shown, an anti-slip protrusion 33 is provided on the top 34, the main purpose of which is to increase the friction between the top 34 and the slot 11 of the bolt 1. When the fastener is installed on the bolt 1 and subjected to external force, the anti-slip protrusion 33 can generate greater friction with the inner wall of the slot 11, preventing the top 34 from sliding within the slot 11. Even under large vibrations or impacts, the anti-slip protrusion 33 can effectively maintain the relative position between the top 34 and the slot 11, preventing the fastener from loosening.
[0068] In some examples, the anti-slip protrusions 33 are strip-shaped and multiple are arranged side by side.
[0069] For example, such as Figure 3 As shown, the anti-slip protrusions 33 are designed as strips arranged side by side, providing better anti-slip performance compared to a single anti-slip protrusion 33. Multiple strip-shaped anti-slip protrusions 33 can be more evenly distributed on the top surface, resulting in a larger contact area with the inner wall of the bolt groove 11 and thus generating greater friction. When subjected to external forces, the multiple anti-slip protrusions can work together to disperse the friction, preventing a single anti-slip protrusion 33 from being damaged due to excessive force, thereby improving the reliability and durability of the anti-slip structure.
[0070] In some examples, the annular groove 22 is located near one end of the through hole 21.
[0071] For example, such as Figure 7 As shown, the annular groove 22 is positioned near the end of the through hole 21, a design that is significant. First, from a structural compactness perspective, placing the annular groove 22 near the through hole 21 allows for a more compact structure of the main body 2, reducing the overall size of the fastener. In mechanical equipment with high space requirements, this compact design better meets installation and usage requirements. Second, during the production of this fastener, it is easier to install the slider 31 into the annular groove 22 and to install the stop 24. The reduced distance also saves installation time and lowers production costs.
[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A long-life anti-loosening fastener for threaded connection to a bolt (1) having a strip-shaped groove (11) formed in the outer wall of the bolt (1) in the axial direction, characterized in that, The utility model relates to a long -life anti -loose fastener, including: The main part (2) has the through -hole (21), the through -hole (21) inner wall is provided with annular slide groove (22), the through -hole (21) inner wall has internal thread, and the internal thread is located one side of annular slide groove (22); The top piece (3) is slidably arranged in the annular slide groove (22), and the top piece (3) has a top (34) for sliding and tightly in the strip slot (11).
2. A long life captive fastener according to claim 1 wherein, The top piece (3) includes: The sliding block (31) is slidably arranged in the annular slide groove (22); The elastic rod (32) is arranged on the sliding block (31) at one end, and the other end is a free end, and the free end of the elastic rod (32) forms the top (34).
3. The long-life anti-loose fastener of claim 2, wherein: The elastic rod (32) is inclinedly arranged along the direction of the central axis of the through hole (21).
4. The long-life anti-loose fastener of claim 2, wherein: The sliding block (31) is annular.
5. The long-life anti-loose fastener of claim 2, wherein: The through hole (21) inner wall still has annular communication groove (23), one end of annular communication groove (23) is communicated with annular slide groove (22), the other end penetrates one end of through hole (21), and annular communication groove (23) is used for allowing sliding block (31) to enter annular slide groove (22);Further including: The stop piece (24) is arranged in the annular communication groove (23), and the stop piece (24) is used to stop sliding block (31).
6. The long-life anti-loose fastener of claim 5, wherein: The inner wall of the annular communication groove (23) has an annular clamping groove (25); The stop piece (24) is a clamping spring, and the clamping spring is clamped in the annular clamping groove (25).
7. The long-life anti-loose fastener of claim 4, wherein: The main part (2) further has a threaded hole (26) communicated with the annular slide groove (22);Further including: The locking screw (4) is threadedly arranged in the threaded hole (26), and the locking screw (4) is used to tightly press the sliding block (31).
8. A long life captive fastener according to claim 2 wherein, The top piece (3) further includes: The anti-skid protrusion (33) is arranged on the top (34).
9. The long-life anti-loose fastener of claim 8, wherein: The anti-skid protrusion (33) is strip-shaped and has a plurality of parallel arrangements.
10. The long-life anti-loose fastener of claim 1, wherein: The annular slide groove (22) is close to one end of the through hole (21).