A mechanical anchor bolt

Abstract

The present invention relates to a mechanical anchor bolt, belonging to the technical field of fasteners. It includes a screw and a nut, and also includes a sleeve with an end N1 and an end N2; the sleeve is sleeved on the screw; the end N2 of the sleeve has an extension piece; the rod body of the screw has a trigger piece; the trigger piece is configured to abut against the extension piece; a fitting piece with a deformation arm and an embedded blade; the fitting piece is connected to the end of the screw; the deformation arm and the embedded blade are integrally formed. This technical solution improves the fastening effect in soft base materials by introducing an embedded locking form. Compared with the traditional friction locking method, the embedded locking method no longer relies on the strength or friction of the base material, but directly produces physical embedding and bite with the hole wall through the fitting piece, providing a more stable fixing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of fasteners, relates to a technology for improving the fit of fasteners, and in particular relates to a mechanical anchor bolt. Background Art

[0002] Mechanical anchor bolts are important tools for fixing building components, mechanical equipment or other structural parts. They are widely used in engineering construction, industrial equipment installation, and large buildings such as bridges and tunnels. Traditional mechanical anchor bolts are usually fixed in the base material (such as concrete, stone or metal plate) by friction, expansion or interlocking to ensure the safety and stability of the structure. However, with the increasing complexity and load requirements of modern buildings and mechanical equipment, traditional mechanical anchor bolts have exposed some limitations in certain special application scenarios.

[0003] First, traditional mechanical anchor bolts are prone to loosening or slipping under heavy loads or vibration environments, especially under long-term stress or dynamic loads, and the fixing effect of the anchor bolts tends to gradually weaken. In order to enhance the pull-out and shear resistance of the anchor bolts, expansion anchor bolts are usually used in the prior art, that is, radial pressure is generated inside the hole wall through the expansion part of the anchor bolt end to enhance the friction with the substrate. However, the fixing effect of this type of expansion anchor bolt is highly dependent on the hardness and strength of the hole wall material. When the base material is relatively soft, such as lightweight concrete, bricks or foam concrete, traditional expansion anchor bolts are difficult to generate enough radial pressure to closely contact the hole wall, resulting in a low degree of embedding of the anchor bolt in the soft substrate and a significant decrease in the fixing performance.

[0004] In soft materials, the strength of the hole wall is not enough to effectively resist the expansion force of the anchor bolt. When the anchor bolt expands, it often causes the hole wall to deform or break, further weakening the fastening effect between the anchor bolt and the substrate. Even if the anchor bolt can provide a certain fixing force during the initial installation, the support force of the soft substrate is limited during long-term use or under dynamic loads, and the anchor bolt is easy to loosen or even fall off. In this case, traditional anchor bolts cannot provide ideal pull-out and shear resistance in soft substrates, which in turn affects the safety and stability of the entire structure. Summary of the invention

[0005] In order to solve the above-mentioned problems in the prior art, the present invention provides a mechanical anchor bolt.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A mechanical anchor bolt is provided, comprising:

[0008] A sleeve having an end N1 and an end N2;

[0009] The sleeve is sleeved on the screw rod;

[0010] Wherein, the end N2 of the sleeve has an extension piece;

[0011] wherein the expansion member is configured to expand radially when subjected to an applied force;

[0012] Furthermore, the shaft of the screw rod has a trigger member;

[0013] Wherein, the trigger member is configured to abut against the extension member to provide the force;

[0014] An engaging member having a deformable arm and an embedding blade;

[0015] The insert is connected to the end of the screw;

[0016] Wherein, the deformable arm and the embedded blade are integrally formed;

[0017] Furthermore, the deformable arm is configured to be controlled by the radial expansion of the extension piece and to be radially expanded synchronously, so as to enable the embedded blade to be embedded into the connecting hole.

[0018] Preferably, the extension comprises:

[0019] An expansion joint is formed along the axis of the sleeve;

[0020] Furthermore, the circumferential wall surface of the sleeve between adjacent expansion joints constitutes an expansion wing;

[0021] The trigger member penetrates into the interior of the expansion wing and props up the expansion wing, so that the expansion wing expands radially.

[0022] Preferably, the triggering member comprises:

[0023] a trigger protrusion, wherein the trigger protrusion is formed by the shaft of the screw;

[0024] Wherein, the diameter D1 of the trigger protrusion is greater than the diameter D2 of the screw.

[0025] Preferably, the deformable arm has:

[0026] A root portion connected to an end of the screw;

[0027] an arm portion, integrally formed with the root portion;

[0028] Wherein, the axis of the arm and the axis of the screw have a set angle a;

[0029] Furthermore, the value range of the angle a is set to be 30° to 70°.

[0030] Preferably, the arm has:

[0031] A deformation slit is opened on the end surface of the arm portion along the length direction of the arm portion;

[0032] The width of the deformation slit is W1, the number is N, the width of the arm is W2, and the following conditions are satisfied:

[0033] N*W1= W2.

[0034] Preferably, it includes:

[0035] a first tooth portion and a second tooth portion;

[0036] The end N1 of the sleeve has an annular gasket, and the first tooth portion is arranged on the end surface M1 of the annular gasket;

[0037] Wherein, the second tooth portion is arranged on the end surface M2 of the embedded blade;

[0038] Furthermore, the end surface M1 is the end surface of the annular gasket facing the extension member;

[0039] Furthermore, the end surface M2 is the end surface of the embedded blade facing the screw.

[0040] Preferably, it includes:

[0041] The third tooth part;

[0042] Wherein, the third tooth portion is arranged on the circumferential wall surface of the sleeve;

[0043] Furthermore, the third tooth portion is located below the second tooth portion;

[0044] The third tooth portion is configured to contact the hole wall when the sleeve extends into the connecting hole.

[0045] Preferably, the circumferential wall surface of the screw has a first thread segment;

[0046] The inner wall surface of the sleeve has a second thread segment;

[0047] Furthermore, the first thread segment is meshed with the second thread segment;

[0048] Wherein, the length of the first thread segment is L1, and the length of the screw is L2;

[0049] Satisfy: L1= L2.

[0050] Preferably, the insert has n layers and is stacked along the axis of the screw;

[0051] Wherein, the deformable arm adjacent to the engaging member has an abutment member;

[0052] The abutment member is configured to push the deformable arms of the next layer to synchronously expand radially when the deformable arms of the current layer expand radially.

[0053] Preferably, the abutment member is arranged on the arm portion of the deformable arm;

[0054] Wherein, the abutment member is a block with an arc-shaped structure;

[0055] Furthermore, the curvature of the arc-shaped structure matches the curvature of the arm.

[0056] The present invention provides a mechanical anchor bolt, and the beneficial effects of the present invention are embodied in:

[0057] This technical solution changes the traditional locking form that relies on friction and innovatively introduces an embedded locking form, which fundamentally improves the fastening effect in soft base materials. Compared with the traditional friction locking method, the embedded locking method no longer relies on the strength or friction of the base material, but directly generates physical embedding and bite between the embedded parts and the hole wall, providing a more stable fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 This is one of the three-dimensional views of the mechanical anchor bolt proposed by the present invention;

[0059] Figure 2 for Figure 1 A local enlarged schematic diagram of the structure shown at position A;

[0060] Figure 3 This is the second stereoscopic diagram of the mechanical anchor bolt proposed by the present invention;

[0061] Figure 4 This is a schematic diagram of the mechanical anchor assembly proposed by the present invention;

[0062] Figure 5 This is one of the cross-sectional views of the mechanical anchor bolt proposed by the present invention;

[0063] Figure 6 This is the second cross-sectional view of the mechanical anchor bolt proposed by the present invention;

[0064] Figure 7 for Figure 6 A partial enlarged schematic diagram of the structure shown at position B;

[0065] Figure 8 for Figure 6 A local enlarged schematic diagram of the structure shown at position C.

[0066] Description of reference numerals:

[0067] 1. Screw; 2. Nut; 3. Sleeve; 4. Extension piece; 401. Expansion joint; 402. Extension wing; 5. Trigger piece; 601. Deformation arm; 6011. Root; 6012. Arm; 6013. Deformation joint; 602. Embedded blade; 701. First tooth portion; 702. Second tooth portion; 703. Third tooth portion; 8. Annular gasket; 9. Abutment piece. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] See also Figures 1 to 8 As shown, the specific embodiments provided by the present invention are as follows:

[0070] like Figures 1 to 4 As shown, the first embodiment of the present invention provides a mechanical anchor bolt, including a screw rod 1 and a nut 2, and also includes:

[0071] A sleeve 3 having an end N1 and an end N2;

[0072] The sleeve 3 is sleeved on the screw 1;

[0073] Wherein, the end N2 of the sleeve 3 has an extension piece 4;

[0074] Wherein, the expansion member 4 is configured to expand radially when subjected to an applied force;

[0075] Furthermore, the shaft of the screw rod 1 has a trigger member 5;

[0076] Wherein, the trigger member 5 is configured to abut against the extension member 4 to provide the force;

[0077] An engaging member having a deformable arm 601 and an embedding blade 602;

[0078] The insert is connected to the end of the screw 1;

[0079] Wherein, the deformable arm 601 and the embedded blade 602 are integrally formed;

[0080] Furthermore, the deformable arm 601 is configured to be controlled by the radial expansion of the extension member 4 and to be radially expanded synchronously, so as to enable the embedded blade 602 to be embedded into the connecting hole.

[0081] In this embodiment, it is relatively difficult to use expansion bolts to perform radial expansion and achieve fastening by friction for soft base materials because:

[0082] Insufficient strength of the matrix material: The soft matrix material (such as lightweight concrete, bricks or foam concrete) has low strength and cannot effectively resist the pressure exerted by the radial expansion of the expansion bolt. The expansion bolt generates radial pressure through the expansion of the bolt tail. If the hole wall material is not strong enough, this pressure can easily cause the hole wall to crack or deform, and then lose support for the bolt.

[0083] Insufficient friction: Traditional expansion bolts rely on the friction between the expansion part and the hole wall to achieve fixation. However, in soft materials, due to the low strength and hardness of the hole wall, the friction is significantly weakened and cannot provide sufficient tightening force. This makes the bolts easy to loosen or slip during stress or long-term use, and cannot ensure a stable fixing effect.

[0084] The hole wall is easily damaged: When the hole wall of the soft substrate is subjected to the radial expansion force of the expansion bolt, it is easy to peel off, compress or break because it cannot withstand the expansion force, which makes the bolt unable to be firmly fixed. Excessive expansion force will damage the hole wall, which greatly reduces the fastening effect.

[0085] In summary, in soft base materials, it is difficult to achieve a stable fastening effect by using a single bolt structure that relies on friction and radial expansion. Excessive expansion force may damage the hole wall, and too low friction force also makes it difficult to achieve a firm fixation. Therefore, other structural designs are needed, such as the multi-layer interlocking parts and deformable arm 601 design in this embodiment, to achieve more contact points and a more stable fixing effect.

[0086] Based on this, this technical solution introduces an embedded locking method by changing the traditional locking method that relies on friction, which fundamentally improves the fastening effect in soft base materials. Compared with the traditional friction locking method, the embedded locking method no longer relies on the strength or friction of the base material, but directly generates physical embedding and bite between the embedded parts and the hole wall, providing a more stable fixing effect.

[0087] Specifically, the technical solution designs a fitting at the end of the screw 1, and the fitting includes a deformable arm 601 and an embedding blade 602. When the anchor bolt is inserted into the connection hole, the nut is screwed to cause the screw 1 to undergo axial displacement, thereby causing the trigger 5 to abut against the extension 4, exerting an axial force, and causing the extension 4 to expand radially. As the extension 4 expands, the deformable arm 601 expands radially synchronously, causing the embedding blade 602 on the fitting to embed into the hole wall of the base material in the radial direction, thereby forming a physical embedding. This physical bite greatly enhances the fixing force of the anchor bolt.

[0088] The embedded locking not only relies on the expansion force, but also directly embeds the embedded blade 602 into the hole wall to achieve multi-point and multi-faceted fastening.

[0089] Friction locking relies on the friction force generated by the radial pressure between the expansion piece and the hole wall, especially in soft substrates, where the substrate cannot provide sufficient friction, causing the anchor bolt to loosen or even fall off.

[0090] The embedded locking provides a physical connection with the base material by directly biting the hole wall with the embedded blade 602. Even in a soft base material, since the embedded blade 602 is deep inside the base material, the fixing effect is more stable and does not depend on the hardness of the hole wall.

[0091] Friction locking relies only on radial friction. When the bolt is subjected to axial pullout, the friction is easily weakened or disappears, causing the anchor to be pulled out. Especially under long-term load conditions, the friction in the soft substrate will gradually decrease.

[0092] The embedded locking significantly increases the pull-out resistance of the anchor bolt by physically engaging the embedded blade 602 with the hole wall. Even when subjected to a large pull-out force, the embedded blade 602 can provide strong resistance to prevent the anchor bolt from coming out, and is suitable for high pull-out environments.

[0093] In traditional friction locking, the friction force generated by radial expansion is mainly directed against axial tension, but the resistance to shear force is relatively limited, and it is easy to loosen due to shear force.

[0094] The embedded locking not only improves the pull-out resistance, but also greatly improves the shear resistance. The embedded blade 602 can effectively disperse the shear force by embedding into the hole wall at multiple points, reducing the stress concentration on a single contact point, thereby improving the shear resistance of the anchor bolt.

[0095] Traditional friction locking relies on the frictional contact between a single expansion point and the hole wall, which can easily lead to local force concentration. Especially in soft substrates, this concentrated force can easily cause local damage to the hole wall, thereby reducing the fixing strength.

[0096] The embedded locking forms multiple embedded points and multiple points of contact with the hole wall through the radial expansion of the deformable arm 601, and the force is more uniform. This multi-point distributed force method can effectively reduce the risk of hole wall damage, especially in soft matrix materials, and can provide more stable support.

[0097] Traditional friction locking does not perform well in soft matrix materials (such as foam concrete, bricks, etc.) due to their low hardness. The advantages of embedded locking are more obvious in this environment: in soft materials, the radial expansion force of friction locking often causes the hole wall to crack or deform, reducing the fixing effect of the anchor bolt. Embedded locking reduces the radial pressure on the hole wall through physical bite, avoiding damage to the hole wall.

[0098] Embedded locking can adapt to base materials of different hardness, especially for soft base materials. The physical embedding structure ensures the stability of the anchor bolt, no longer relying solely on the strength of the hole wall, and improves the versatility of the anchor bolt in different materials.

[0099] like Figures 1 to 5 As shown, the second embodiment of the present invention provides a mechanical anchor bolt, and based on the first embodiment, the extension member 4 includes:

[0100] The expansion joint 401 is formed along the axis of the sleeve 3;

[0101] Furthermore, the circumferential wall surface of the sleeve 3 between the adjacent expansion joints 401 constitutes an expansion wing 402;

[0102] The trigger member 5 penetrates into the interior of the expansion wing 402 and props up the expansion wing to make the expansion wing expand radially.

[0103] In this embodiment, the extension member 4 pushes the deformable arm 601 of the engaging member to expand synchronously through radial expansion, thereby enhancing the fixing performance of the anchor bolt. The extension member 4 not only realizes its own radial expansion, but also effectively drives the deformable arm 601 of the engaging member to expand, further enhancing the engaging effect of the anchor bolt. Specifically, it is embodied as follows:

[0104] When the trigger 5 contacts the extension piece 4 and applies a force, the extension piece 4 expands in the radial direction and pushes the deformable arm 601 of the engaging piece to expand synchronously in the radial direction. The expansion of the extension piece 4 not only expands its own contact area, but also drives the deformable arm 601 of the engaging piece to gradually expand outward through the linkage mechanism, so that the embedded blade 602 can be deeply embedded in the hole wall. This embedding method enhances the physical engagement with the hole wall and greatly improves the fixing strength of the anchor bolt.

[0105] The extension piece 4 pushes the deformation arm 601 to expand, so that the anchor bolt forms multiple fitting points in the radial direction, ensuring a closer multi-point contact with the hole wall. Compared with the traditional expansion bolt that only achieves fixation through radial expansion, this embodiment achieves a more uniform force distribution through the synergy of the extension piece 4 and the deformation arm 601, avoiding the problem of hole wall damage caused by stress concentration.

[0106] When the extension piece 4 pushes the deformable arm 601 to expand, the embedded blade 602 of the insert is able to penetrate deeply into the hole wall. Compared with the traditional friction locking method, the embedded locking effectively improves the embedding depth and fixing effect through the radial thrust of the extension piece 4. Especially in soft matrix materials, the deep embedding of the insert can provide stronger pull-out resistance and shear resistance.

[0107] Furthermore, since the screw 1 rotates and is accompanied by axial displacement, the embedded blade 602 also rotates and displaces axially synchronously. In other words, the function of the embedded blade 602 is not just to simply embed into the hole wall, but to cut a spiral ascending path inside the hole wall through synchronous rotation with the screw 1, axial displacement and radial expansion of the embedded blade 602. This design greatly enhances the fixing effect of the anchor bolt, making it more stable and firm in soft matrix materials.

[0108] Specifically, as the screw 1 rotates and moves axially, the embedded blade 602 not only expands radially, but also rotates helically and propels axially synchronously. This movement mode enables the embedded blade 602 to form a spiral cutting path inside the hole wall, forming a multi-level and multi-dimensional close contact with the hole wall:

[0109] By rotating the screw 1, the embedded blade 602 cuts the hole wall in the spiral direction, which can not only increase the embedding depth of the embedded part, but also form a longer path in the hole wall to increase the contact area. During the rotation and displacement process, the embedded blade 602 gradually expands radially, not only embedding into the hole wall, but also gradually expanding the contact range of the hole wall during the cutting process, forming a tighter locking structure.

[0110] This spiral cutting method has many advantages:

[0111] On the one hand, compared with the traditional radial expansion embedding, the spiral ascending path provides a more complex embedding structure for the anchor bolt, improving the overall embedding strength and pull-out resistance. The cutting path increases the engagement points between the hole wall and the embedding blade 602, greatly enhancing the axial and radial fixing force of the anchor bolt. On the other hand, the spiral ascending cutting path helps to form a thread-like structure, which provides additional resistance when subjected to a pull-out force, increases the self-locking effect of the anchor bolt, and prevents the anchor bolt from loosening or being pulled out due to external forces.

[0112] In summary, through the rotation and axial displacement of the screw 1, the embedded blade 602 realizes synchronous rotation, axial movement and radial expansion, and cuts a spiral ascending path inside the hole wall. Compared with the traditional simple embedding method, this cutting path provides a stronger fixing force and self-locking effect for the anchor bolt, especially in soft materials, which can greatly enhance the pull-out resistance and stability of the anchor bolt.

[0113] The third embodiment of the present invention provides a mechanical anchor bolt, and based on the previous embodiment, the trigger member 5 includes:

[0114] A trigger protrusion, wherein the trigger protrusion is formed by the shaft of the screw rod 1;

[0115] The diameter D1 of the trigger protrusion is larger than the diameter D2 of the screw rod 1 .

[0116] In this embodiment, the trigger member 5 further enhances the fixing effect of the anchor bolt by designing a trigger protrusion. Specifically, the diameter of the trigger protrusion is larger than the diameter of the screw rod 1, which means that when the screw rod 1 rotates or moves axially, the trigger protrusion can more effectively push the extension member 4 to expand. The difference in the protrusion diameter provides a stronger force, so that the extension member 4 can achieve more sufficient radial expansion under the push of the trigger member 5, ensuring that the deformation arm 601 and the embedded blade 602 of the fitting member are more fully and stably expanded.

[0117] Since the size of the protrusion is larger than the diameter of the screw 1, the extension piece 4 can receive a more uniform force over a larger contact area, thereby avoiding the problem of uneven local force. During the radial expansion process, the trigger protrusion can more directly and forcefully drive the deformable arm 601 of the engaging piece to expand synchronously, so that the embedded blade 602 can be more effectively engaged with the hole wall. This synchronous expansion can not only increase the embedding depth of the anchor bolt, but also increase the contact area of ​​the hole wall and improve the overall fixing force. The trigger protrusion interacts with the extension piece 4 through the rotation and axial movement of the screw 1 to achieve a step-by-step expansion of the engaging piece. The design in which the diameter D1 is larger than D2 provides a stronger expansion control force, making the expansion process more precise and avoiding the phenomenon of over-expansion or under-expansion.

[0118] Secondly, the diameter difference of the trigger protrusion makes it play a similar self-locking effect inside the hole wall. As the screw 1 rotates, the expansion force of the trigger protrusion can not only push the extension piece 4 to expand, but also provide additional mechanical resistance through its own size to prevent the anchor bolt from loosening or pulling out when subjected to force.

[0119] Therefore, in this embodiment, by designing the trigger protrusion and making its diameter larger than the diameter of the screw 1, the present invention provides more effective radial expansion control, precise driving of the deformation of the engaging member, and significantly improved pull-out and shear resistance. The diameter difference of the trigger protrusion enables it to achieve a more stable and precise engagement effect between the anchor bolt and the hole wall in the process of pushing the extension member 4 and the deformation arm 601 to unfold, which is particularly suitable for fixing requirements requiring high stability in soft matrix materials.

[0120] like Figure 1 to Figure 2 As shown, the fourth embodiment of the present invention proposes a mechanical anchor bolt, and based on the previous embodiment, the deformable arm 601 has:

[0121] A root portion 6011, wherein the root portion 6011 is connected to an end portion of the screw rod 1;

[0122] The arm portion 6012 is integrally formed with the root portion 6011;

[0123] Wherein, the axis of the arm 6012 and the axis of the screw 1 have a set angle a;

[0124] Furthermore, the value range of the angle a is set to be 30° to 70°.

[0125] In this embodiment, the design of the deformable arm 601 further optimizes the fixing performance of the anchor bolt. Specifically, the root 6011 of the deformable arm 601 is connected to the end of the screw rod 1, the arm 6012 and the root 6011 are integrally formed, and a set angle a is formed between the axis of the arm 6012 and the axis of the screw rod 1, and the value range is 30° to 70°. This design improves the fitting effect and adaptability of the anchor bolt in many aspects:

[0126] The set angle a (30° to 70°) ensures that the deformable arm 601 can be properly expanded under the action of the extension member 4 and form a good angle contact with the hole wall. This angle design enables the deformable arm 601 to be effectively embedded in the hole wall when radially expanded, thereby increasing the fixing force of the anchor bolt.

[0127] The angle range of 30° to 70° ensures that the deformable arm 601 can adapt to different embedding requirements in different hole wall materials. For example, a smaller angle is more suitable for harder matrix materials, while a larger angle can provide greater radial expansion in soft matrix materials, thereby increasing the embedding surface area.

[0128] When the extension piece 4 pushes the deformable arm 601 to expand radially, this angle can effectively disperse the force, so that the embedding force is evenly distributed on the surface of the deformable arm 601 and the embedding edge 602, avoiding stress concentration at a certain point and causing anchor failure. Through this angle, the deformable arm 601 can be embedded deeper into the hole wall in the radial direction, further improving the embedding depth and pull-out resistance of the anchor.

[0129] The root 6011 of the deformable arm 601 is integrally formed with the arm 6012, providing higher structural strength and stability. This design enables the deformable arm 601 to be expanded in a more uniform manner when acted upon by the extension member 4, reducing structural looseness or fatigue problems caused by multi-component connection, thereby improving the stability of the anchor bolt in long-term use.

[0130] In soft matrix materials, a larger angle (close to 70°) can provide a larger expansion angle in the radial direction, so that the deformable arm 601 can be more effectively embedded in the hole wall, increasing the embedding area and improving the fixing effect. This expansion method can effectively disperse external forces in materials with lower strength and avoid local damage to the hole wall.

[0131] For harder base materials, a smaller angle (close to 30°) can ensure that the deformable arm 601 is embedded in the hole wall at a smaller angle when it is unfolded, providing a stronger mechanical bite force and reducing damage to the hard material hole wall. At the same time, a smaller angle can also reduce the displacement of the deformable arm 601 and improve the overall stability of the anchor bolt.

[0132] The design of setting the angle a not only balances the expansion range and the embedding depth of the deformable arm 601, but also optimizes the applicability of the anchor bolt in various materials. A larger angle is conducive to providing a larger expansion range, while a smaller angle ensures a more effective embedding depth. This angle setting ensures that the anchor bolt can provide the best embedding effect in different environments.

[0133] This embodiment optimizes the force transmission and the expansion mode of the deformable arm 601 by accurately setting the angle of the deformable arm 601, especially significantly enhancing the adaptability in soft or hard matrix materials. The set angle a (30° to 70°) ensures the fixing effect of the anchor bolt in different application scenarios, providing a larger expansion angle to increase the contact area while maintaining the depth and strength of the engagement. At the same time, the one-piece design further enhances the structural stability and shear resistance of the anchor bolt.

[0134] The fifth embodiment of the present invention provides a mechanical anchor bolt, and based on the previous embodiment, the arm 6012 has:

[0135] A deformation slit 6013 is provided on the end surface of the arm portion 6012 along the length direction of the arm portion 6012;

[0136] The width of the deformation slits 6013 is W1, the number is N, the width of the arm 6012 is W2, and the following conditions are satisfied:

[0137] N*W1= W2.

[0138] In this embodiment, the design of the deformable arm 601 is further optimized by providing a deformable slit 6013 in the arm portion 6012, thereby improving the elasticity and controllability of the deformable arm 601, thereby enhancing the expansion effect and adaptability of the anchor bolt. Specifically, the deformable slit 6013 is provided along the length direction of the arm portion 6012 and plays an important role in the deformation process. This design has significant advantages in many aspects:

[0139] By providing a deformation slit 6013 on the end surface of the arm 6012, the arm 6012 can be more flexible when radially expanding. The existence of the deformation slit 6013 enables the arm 6012 to achieve more precise deformation control when subjected to force, reduces the rigidity of the arm 6012 during the expansion process, and enables it to be more adaptively expanded in different base materials. The deformation slit 6013 allows the arm 6012 to be expanded in sections along a specific direction, avoiding irregular deformation of the arm 6012 during the expansion process, ensuring that the fitting can be evenly stressed when in contact with the hole wall, and improving the fixing effect of the anchor bolt.

[0140] The design of the width W1 of the deformation slit 6013 directly affects the expansion characteristics of the arm 6012. According to the design, the relationship between the number N of the deformation slits 6013 and the width W2 of the arm 6012 satisfies the formula: N*W1= W2. This formula ensures that the total width of the deformation slits 6013 will not be too large or too small, thereby ensuring that the arm 6012 has sufficient flexibility while maintaining its overall structural strength. Defined by this formula, the number and width of the deformation slits 6013 are balanced, so that the arm 6012 can provide a larger deformation space during the deformation process while maintaining sufficient strength. This design avoids the problem of uneven deformation or insufficient strength of the arm 6012 caused by too many or too few deformation slits 6013.

[0141] In general, the presence of the deformation slits 6013 enables the arm 6012 to be more evenly expanded under the action of the extension member 4. The design of the width and number of the deformation slits 6013 ensures that when the extension member 4 pushes the deformation arm 601 to expand, the arm 6012 can evenly disperse the external force, reduce stress concentration points, and prevent damage or excessive deformation during the expansion process.

[0142] Although the existence of the deformation seam 6013 improves the flexibility of the arm 6012, the The formula of W2 ensures that the total width of the deformation joint 6013 will not exceed half of the arm 6012. This design effectively avoids excessive deformation of the arm 6012 during the expansion process, while maintaining the overall strength of the arm 6012 after expansion, ensuring the pull-out and shear resistance of the anchor bolt under dynamic load. When the external force is reduced or removed, a reasonable design of the deformation joint 6013 can better restore the deformation arm 601 to its original state, thereby enhancing the stability of the anchor bolt in long-term use and avoiding failure of the deformation arm 601 due to fatigue or excessive deformation.

[0143] In this embodiment, a deformation slit 6013 is provided on the deformation arm 601, and N*W1= The formula of W2 defines the width and number of the deformation slits 6013, further enhancing the expansion performance and interlocking stability of the anchor bolt. The existence of the deformation slits 6013 enables the deformation arm 601 to more flexibly adapt to the hole walls of different materials during the expansion process, while ensuring uniform force transmission during expansion to avoid stress concentration. In addition, while providing sufficient expansion flexibility, the design also maintains the strength of the arm 6012, ensuring the pull-out and shear resistance of the anchor bolt in long-term use.

[0144] The sixth embodiment of the present invention provides a mechanical anchor bolt, and based on the previous embodiment, comprises:

[0145] A first tooth portion 701 and a second tooth portion 702;

[0146] The end N1 of the sleeve 3 has an annular gasket 8, and the first tooth portion 701 is disposed on the end surface M1 of the annular gasket 8;

[0147] Wherein, the second tooth portion 702 is disposed on the end surface M2 of the embedded blade 602;

[0148] Furthermore, the end surface M1 is the end surface of the annular gasket 8 facing the extension member 4;

[0149] Furthermore, the end surface M2 is the end surface of the embedded blade 602 facing the screw 1;

[0150] The third tooth portion 703;

[0151] Wherein, the third tooth portion 703 is arranged on the circumferential wall surface of the sleeve 3;

[0152] Furthermore, the third tooth portion 703 is located below the second tooth portion 702;

[0153] The third tooth portion 703 is configured to contact the hole wall when the sleeve 3 extends into the connecting hole.

[0154] In this embodiment, the mechanical anchor bolt further enhances the multi-point engagement force and overall fixing stability between the anchor bolt and the hole wall by adding the first tooth portion 701, the second tooth portion 702 and the third tooth portion 703. Specifically, the three teeth form effective contact with the hole wall at different positions and directions, thereby improving the pull-out resistance, shear resistance and fixing force of the anchor bolt. The following is a detailed analysis of the role of each tooth portion:

[0155] The first tooth portion 701 is located on the end surface M1 of the annular gasket 8 on the end N1 of the sleeve 3, facing the extension member 4. This design ensures that the initial contact between the first tooth portion 701 and the hole wall can provide additional friction when the extension member 4 is unfolded. The teeth on the annular gasket 8 can generate more support points when expanding, preventing the sleeve 3 from displacement or rotation during the fixing process.

[0156] The second tooth portion 702 is located on the end surface M2 of the embedded blade 602, facing the screw 1. After the anchor bolt is inserted into the hole wall, as the embedded blade 602 expands radially, the second tooth portion 702 further provides physical embedding by directly contacting the hole wall. This physical bite can increase the pull-out resistance of the anchor bolt, ensuring that the anchor bolt can remain stable even when subjected to a large axial force.

[0157] The third tooth portion 703 is arranged on the circumferential wall surface of the sleeve 3, and is located below the second tooth portion 702. This design enables the third tooth portion 703 to directly form a close contact with the hole wall when the anchor bolt is inserted into the hole wall. The third tooth portion 703 increases the overall engagement force of the anchor bolt through friction and bite with the hole wall, especially when the anchor bolt is in the inserted position, the third tooth portion 703 can provide additional support and fixing effect for the entire anchor bolt.

[0158] This embodiment enhances the multi-point engagement force of the anchor bolt by providing the first tooth portion 701, the second tooth portion 702 and the third tooth portion 703, making the anchor bolt more firmly and stably fixed in the hole wall. Each tooth portion provides targeted engagement and friction at different positions, which not only improves the pull-out resistance and shear resistance of the anchor bolt, but also disperses stress through multi-point contact to avoid damage to the hole wall. This design is particularly suitable for use in soft matrix materials, and can significantly improve the anchor bolt's fixing effect and long-term durability.

[0159] The seventh embodiment of the present invention provides a mechanical anchor bolt, and based on the previous embodiment, the circumferential wall surface of the screw rod 1 has a first thread segment;

[0160] The inner wall surface of the sleeve 3 has a second thread segment;

[0161] Furthermore, the first thread segment is meshed with the second thread segment;

[0162] Wherein, the length of the first thread segment is L1, and the length of the screw 1 is L2;

[0163] Satisfy: L1= L2.

[0164] In this embodiment, the two form a meshing connection.

[0165] like Figures 6 to 8 As shown, the eighth embodiment of the present invention provides a mechanical anchor bolt, and based on the previous embodiment, the embedded part has n layers, and is stacked along the axis of the screw rod 1;

[0166] Wherein, the deformable arm 601 adjacent to the engaging member has an abutment member 9;

[0167] The abutment member 9 is configured to push the deformation arms 601 of the next layer to expand radially synchronously when the deformation arms 601 of the current layer expand radially.

[0168] In this embodiment, the mechanical anchor bolt further improves the embedding effect of the anchor bolt by introducing a design of a multi-layer embedding piece. The embedding piece has n layers and is stacked along the axis of the screw rod 1. This multi-layer structure can provide multiple expansions and a larger contact area when the anchor bolt is embedded in the hole wall, thereby improving the fixing force and stability of the anchor bolt.

[0169] The interlocking parts in this embodiment are stacked along the axis of the screw 1, and the deformation arms 601 of each layer can be independently expanded in the radial direction. Through this multi-layer structural design, when the anchor is embedded in the hole wall, the deformation arms 601 can be expanded layer by layer to ensure multiple embeddings, achieve a larger contact area and embedding depth, and improve the fixing performance of the anchor. The deformation arms 601 of each layer of the interlocking parts can be embedded according to different positions of the hole wall. Through layer-by-layer expansion, the stress can be effectively dispersed to avoid concentration on a certain point. The stacked design increases the contact surface with the hole wall, which helps to maintain the stability of the anchor under large tension or lateral force.

[0170] Abutment members 9 are provided between the deformable arms 601 of adjacent interlocking parts. The function of the abutment members 9 is to push the deformable arms 601 of the next layer to expand synchronously when the deformable arms 601 of the current layer expand radially. This design ensures that the deformable arms 601 of each layer of interlocking parts can work together, and the expansion of one layer drives the expansion of the next layer, thereby ensuring the order and consistency of the expansion.

[0171] The presence of the abutment member 9 enables the embedded parts to be expanded layer by layer during the expansion process, thereby avoiding the uneven expansion problem that may occur when each layer of embedded parts is expanded separately. Through synchronous expansion, the deformable arms 601 of each layer of embedded parts can form multiple embedding points in the hole wall, providing stronger bite force and fixing effect.

[0172] As the embedded parts are stacked layer by layer, the deformable arms 601 of each layer are sequentially expanded in the radial direction to form multiple expansion points. Through the multi-layer embedded design, the anchor bolt can provide multiple embedded points in the hole wall, which greatly improves the pull-out resistance of the anchor bolt and prevents the anchor bolt from falling out of the hole wall under the action of external force.

[0173] When the multi-layer insert is radially expanded, it can closely contact the hole wall at different depths and angles, thereby improving the shear resistance of the anchor bolt. The multi-layer structure of the insert can effectively disperse the shear force, reduce the stress concentration of the single-layer insert, and make the anchor bolt more stable when subjected to lateral force.

[0174] This embodiment ensures the synchronous expansion of the embedded parts by setting up multiple layers of embedded parts and setting abutment parts 9 between the deformation arms 601 of adjacent embedded parts, thereby improving the fixing effect and pull-out and shear resistance of the anchor bolt. The design of the multi-layer embedded parts enables the anchor bolt to provide more embedded points and contact areas in the hole wall, effectively disperse stress, and improve stability and durability. Through the synergistic effect of the abutment parts 9, the embedded parts can be expanded layer by layer to adapt to different base materials, so that the anchor bolt can maintain good performance in a variety of complex application scenarios.

[0175] In a specific embodiment, the abutment member 9 is disposed on the arm portion 6012 of the deformable arm 601;

[0176] Wherein, the abutment member 9 is a block with an arc-shaped structure;

[0177] Moreover, the curvature of the arc-shaped structure matches the curvature of the arm 6012 .

[0178] The abutment member 9 is arranged on the arm portion 6012 of the deformable arm 601 and is designed as a block of an arc structure. The design of this arc structure can be adapted to the curvature of the deformable arm 601, making the entire expansion and interlocking process more coordinated and stable. Specifically, it is as follows:

[0179] The abutment member 9 is designed as an arc-shaped block, which is adapted to the curvature of the deformation arm 601, which ensures that the abutment member 9 can match the natural deformation direction and angle of the deformation arm 601 when pushing the deformation arm 601 of the adjacent layer, reducing uneven force or deformation failure caused by mismatch. The arc-shaped abutment member 9 is adapted to the curvature of the deformation arm 601, so that the extension member 4 maintains smooth and stable expansion during the radial expansion process, effectively avoiding local stress concentration or excessive deformation of the deformation arm 601 caused by uncoordinated deformation.

[0180] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical anchor bolt, comprising a screw rod and a nut, characterized in that: include: A sleeve having an end N1 and an end N2; The sleeve is sleeved on the screw rod; Wherein, the end N2 of the sleeve has an extension piece; wherein the expansion member is configured to expand radially when subjected to an applied force; Furthermore, the shaft of the screw rod has a trigger member; Wherein, the trigger member is configured to abut against the extension member to provide the force; An engaging member having a deformable arm and an embedding blade; The fitting is connected to the end of the screw; Wherein, the deformable arm and the embedded blade are integrally formed; Furthermore, the deformable arm is configured to be controlled by the radial expansion of the extension member and to be radially expanded synchronously, so as to cause the embedded blade to be embedded into the connecting hole; The insert has n layers and is stacked along the axis of the screw; Wherein, the deformable arm adjacent to the engaging member has an abutment member; The abutment member is configured to push the deformation arms of the next layer to radially expand synchronously when the deformation arms of the current layer expand radially; The abutment member is arranged on the arm portion of the deformable arm; Wherein, the abutment member is a block with an arc-shaped structure; Furthermore, the curvature of the arc-shaped structure matches the curvature of the arm; Between the deformation arms of adjacent interlocking parts, an abutment member is provided. When radial expansion occurs, the deformation arm of the next layer is pushed to expand synchronously; The expansion drives the expansion of the next layer, ensuring the order and consistency of expansion; As the screw rotates and is accompanied by axial displacement, the embedded blade rotates and displaces axially synchronously, cutting a spiral ascending path inside the hole wall; The extension includes: An expansion joint is formed along the axis of the sleeve; Furthermore, the circumferential wall surface of the sleeve between adjacent expansion joints constitutes an expansion wing; Wherein, the trigger member penetrates into the interior of the expansion wing and props up the expansion wing, so that the expansion wing expands radially; The triggering member comprises: a trigger protrusion, wherein the trigger protrusion is formed by the shaft of the screw; Wherein, the diameter D1 of the trigger protrusion is greater than the diameter D2 of the screw; The deformable arm has: A root portion connected to an end of the screw; an arm portion, integrally formed with the root portion; Wherein, the axis of the arm and the axis of the screw have a set angle a; Moreover, the value range of the angle a is set to be: 30° to 70°; The arm has: A deformation slit is opened on the end surface of the arm portion along the length direction of the arm portion; The width of the deformation slit is W1, the number is N, the width of the arm is W2, and the following conditions are satisfied: N*W1= W2; The circumferential wall surface of the screw has a first thread segment; The inner wall surface of the sleeve has a second thread segment; Furthermore, the first thread segment is meshed with the second thread segment; Wherein, the length of the first thread segment is L1, and the length of the screw is L2; Satisfy: L1= L2.

2. The mechanical anchor bolt according to claim 1, characterized in that: include: a first tooth portion and a second tooth portion; The end N1 of the sleeve has an annular gasket, and the first tooth portion is arranged on the end surface M1 of the annular gasket; Wherein, the second tooth portion is arranged on the end surface M2 of the embedded blade; Furthermore, the end surface M1 is the end surface of the annular gasket facing the extension member; Furthermore, the end surface M2 is the end surface of the embedded blade facing the screw.

3. The mechanical anchor bolt according to claim 2, characterized in that: include: The third tooth part; Wherein, the third tooth portion is arranged on the circumferential wall surface of the sleeve; Furthermore, the third tooth portion is located below the second tooth portion; The third tooth portion is configured to contact the hole wall when the sleeve extends into the connecting hole.

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