Sleeve and bolt

Abstract

The invention relates to the technical field of bolt assembly, and discloses a sleeve and a bolt, the sleeve comprises a sleeve body, a groove body is formed in the top of the sleeve wall, and a screw is suitable for being assembled in the sleeve body; the at least two wing pieces are oppositely arranged on the groove body, each wing piece comprises a movable part arranged at the end and an unfolding part formed by extending in the direction away from the movable part, the movable parts are movably connected with the groove body, and each wing piece has a first state parallel to the axial direction of the sleeve body and a second state perpendicular to the axial direction of the sleeve body; the screw rod is clamped by utilizing a mechanical structure, the problem of locking failure caused by fatigue of an elastic element is avoided, the screw rod can be continuously and stably fixed, the connection stability is ensured, and loosening is effectively prevented. And in the case of complicated mounting environments such as a single-side hollow wall body, the safety can be guaranteed, and the fixing reliability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bolt assembly, and in particular to a sleeve and a bolt. Background Art

[0002] An expansion bolt is a mechanical part used for fastening connections. It consists of a head, a screw and an expansion part. It needs to be matched with a nut. The screw has threads and the expansion part has a sleeve and other structures. When installing, first drill a hole in the base, insert it into the hole, put the parts to be fixed and put on the nut, tighten the nut to make the sleeve expand and get stuck on the hole wall. It is commonly used in construction, mechanical installation, home decoration and other fields.

[0003] However, when facing a hollow wall on one side, the expansion part of the expansion bolt has no effective support in the hollow area and is only fixed by the friction of the solid part on one side. When subjected to force, especially lateral tension or vibration, it is very easy to loosen, shift or even fall out, resulting in fixation failure and affecting safety. Although there is a kind of anti-loosening bolt in the prior art, a spring is provided inside, and the bolt is fixed by the elastic pressure of the spring. However, the spring is prone to elastic fatigue due to long-term pressure and vibration. Changes in the elasticity of the spring will make the pressure on the bolt unstable, affecting the anti-loosening effect. Summary of the invention

[0004] In view of this, the present invention provides a sleeve and a bolt to solve the problem of poor stability of the anti-loosening bolt in the prior art when facing a single-sided hollow wall.

[0005] In a first aspect, the present invention provides a casing, comprising:

[0006] The sleeve body has a groove on the top of the tube wall, and the sleeve body is suitable for assembling a screw rod;

[0007] At least two wing members are arranged on the groove body in opposite directions, the wing members include a movable portion arranged at an end portion, and an expansion portion extending away from the movable portion, the movable portion is movably connected to the groove body, and the wing members have a first state parallel to the axial direction of the sleeve body and a second state perpendicular to the axial direction of the sleeve body;

[0008] When the screw is assembled in the sleeve body and abuts against the movable part, a force is applied to the wing member to switch from the first state to the second state, so that in the second state, the relatively arranged movable parts abut against the outer walls of the screw respectively and apply opposite clamping forces.

[0009] Optionally, a latching tooth is provided on the end surface of the movable portion abutting against the screw rod, and the latching tooth is conformally matched with the thread on the screw rod.

[0010] Optionally, a chamfer is provided at the connection between the movable portion and the slot body.

[0011] Optionally, the groove body extends along the axial direction of the sleeve body but is not arranged to penetrate the bottom of the sleeve body.

[0012] Optionally, it also includes:

[0013] A moving member is movably arranged in the groove body, the moving member is suitable for moving along the axial direction of the sleeve body, the movable part is rotationally connected to the moving member, and the moving member is provided with a through hole allowing the screw to pass through.

[0014] Optionally, the moving member is provided with a slot along the rotation direction of the movable part.

[0015] Optionally, it also includes:

[0016] A limiting groove, which is arranged along the axial direction of the sleeve body;

[0017] The limiting member is rotatably arranged on the wing member, and the limiting member is slidably arranged in the limiting groove.

[0018] Beneficial Effects

[0019] The sleeve provided by the present invention includes a sleeve body and at least two wing members, a slot body is opened at the top of the sleeve body tube wall, the wing members are relatively arranged on the slot body, and the movable part thereof can be movably connected at the slot body, and there is a first state parallel to the sleeve axis and a second state perpendicular thereto. When the screw is installed into the sleeve body and abuts against the movable part, the wing member will be switched from the first state to the second state, at which time the relative movable parts respectively abut against the outer wall of the screw and apply opposite clamping forces. Compared with the traditional anti-loosening bolt, the spring inside the traditional anti-loosening bolt is prone to elastic fatigue due to long-term pressure and vibration, and the change of spring elasticity will make the pressure on the bolt unstable, affecting the anti-loosening effect. However, the present sleeve uses a mechanical structure to clamp the screw, and there is no problem of anti-loosening failure caused by fatigue of the elastic element. The screw can be fixed continuously and stably, the stability of the connection is ensured, and loosening is effectively prevented. When facing complex installation environments such as single-sided hollow walls, safety can be guaranteed and the reliability of fixation can be improved.

[0020] In a second aspect, the present invention provides a bolt, comprising:

[0021] A casing as described above;

[0022] The screw is arranged in the sleeve body.

[0023] Optionally, the tail of the screw is provided with an introduction portion.

[0024] Optionally, the introduction portion is a tapered tip. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A front view of a sleeve according to an embodiment of the present invention;

[0027] Figure 2 A side view of a sleeve according to an embodiment of the present invention;

[0028] Figure 3 It is a cross-sectional schematic diagram of the working state of the bolt according to an embodiment of the present invention;

[0029] Figure 4 It is a cross-sectional schematic diagram of the bolt in the embodiment of the present invention when switching from an idle state to a working state;

[0030] Figure 5 It is a cross-sectional schematic diagram of the bolt in actual use according to the embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Casing body; 11. Slot body;

[0033] 2. wing member; 21. movable portion; 22. unfolding portion;

[0034] 3. Moving parts; 4. Limiting parts; 5. Screws; 6. Building walls; 7. Decorative panels. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] Combine the following Figures 1 to 5 , describing an embodiment of the present invention.

[0037] According to an embodiment of the present invention, on the one hand, a sleeve is provided, comprising:

[0038] The sleeve body 1 has a groove 11 on the top of the tube wall, and the sleeve body 1 is suitable for assembling a screw 5;

[0039] At least two wing members 2 are arranged on the groove body 11 opposite to each other. The wing member 2 includes a movable portion 21 arranged at the end, and an expansion portion 22 extending away from the movable portion 21. The movable portion 21 is movably connected to the groove body 11. The wing member 2 has a first state parallel to the axial direction of the sleeve body 1 and a second state perpendicular to the axial direction of the sleeve body 1.

[0040] When the screw 5 is assembled in the sleeve body 1 and abuts against the movable part 21, a force is applied to the wing 2 to switch from the first state to the second state, so that in the second state, the relatively arranged movable parts 21 respectively abut against the outer wall of the screw 5 and apply opposite clamping forces.

[0041] It should be noted that the groove 11 axially opened on the sleeve provides space and guidance for the wing 2. When inserted into the drill hole, the wing 2 is arranged along the length direction of the groove 11, without adding additional radial dimensions, which is convenient for insertion. The screw 5 is inserted into the sleeve body 1 along the axial direction and contacts the wing 2, pushing it to rotate to the second vertical state. The groove 11 keeps the wing 2 stable to ensure that the movable part 21 accurately abuts against the outer wall of the screw 5 and is clamped, thereby ensuring stability, reducing external force damage, and extending service life.

[0042] It should be noted that in the first state, the wing 2 is parallel to the axis of the sleeve, and the movable portion 21 is not in the groove body 11. At this time, the movable portion 21 of the wing 2 is located outside the tube wall in the circumferential direction of the sleeve body 1, and is in close or nearly close contact with the tube wall, and is in a contracted state. When the entire sleeve is inserted into the mounting hole, the wing 2 will not interfere with the insertion process of the sleeve, and maintain a smaller outer diameter. The expansion portion 22 naturally stretches along the axial direction of the sleeve, forming a relatively smooth whole with the sleeve body 1 in appearance, which facilitates the placement and initial positioning of the sleeve in the installation environment, until the screw 5 is inserted into the sleeve body 1 and rotates to trigger the change of the state of the wing 2.

[0043] In the second state, the wing member 2 is axially perpendicular to the sleeve body 1. At this time, the movable portion 21 of the wing member 2 rotates to a vertical position around the connection point with the sleeve body 1 under the push of the abutment of the screw 5. The relatively arranged movable portions 21 are tightly abutted against the outer wall of the screw 5. Due to the symmetrical distribution of the wing member 2, the two movable portions 21 apply opposite clamping forces to the screw 5. The clamping force can effectively fix the screw 5 to prevent it from loosening or shifting in the sleeve body 1. When subjected to external forces (such as vibration, lateral tension, etc.), the clamping effect provided by the wing member 2 can ensure the stability of the connection, ensuring that the structure has higher safety and reliability when used in construction, mechanical installation, home decoration and other fields.

[0044] In detail, one end of the wing member 2 is a movable portion 21, and the movable portion 21 is movably connected to the slot body 11. The wing member 2 can be flexibly rotated around the connection point, so that it can switch between different states. The movable portion 21 ensures that the wing member 2 can change its position smoothly, and can also withstand and transmit force to a certain extent.

[0045] It should be noted that in this embodiment, there are two wing members 2. The two symmetrical wing members 2 can evenly apply clamping force to the screw rod 5 from two opposite directions, so that the position of the screw rod 5 is stable, deviation is avoided, and connection accuracy and reliability are guaranteed. It has the advantages of simple design and manufacturing, low cost, direct matching, and easy installation and maintenance.

[0046] Of course, in other embodiments, three or more wing members 2 may be provided. A larger number of wing members 2 have a strong clamping force, good wrapping of the screw 5, can disperse external forces, and are more secure when subjected to large dynamic loads or complex force environments (such as heavy machinery, large bridge bolt connections). However, its structure is complex, the manufacturing difficulty and cost are increased, and multiple wing members 2 are prone to mutual interference, occupying a large space, and cannot be used when the installation space is limited. In practical applications, the production can be selected and set according to needs.

[0047] The sleeve provided by the embodiment of the present invention includes a sleeve body 1 and at least two wing members 2, and a slot body 11 is opened on the top of the tube wall of the sleeve body 1. The wing members 2 are relatively arranged on the slot body 11, and the movable part 21 thereof can be movably connected at the slot body 11, and there is a first state parallel to the sleeve axis and a second state perpendicular to the sleeve axis. When the screw 5 is installed in the sleeve body 1 and abuts against the movable part 21, the wing member 2 will switch from the first state to the second state, and at this time, the relative movable parts 21 respectively abut against the outer wall of the screw 5 and apply a clamping force in the opposite direction. Compared with the traditional anti-loosening bolt, the spring inside the traditional anti-loosening bolt is prone to elastic fatigue due to long-term pressure and vibration. The change of spring elasticity will make the pressure on the bolt unstable, affecting the anti-loosening effect. However, the present sleeve uses a mechanical structure to clamp the screw 5, and there is no problem of anti-loosening failure caused by fatigue of the elastic element. The screw 5 can be fixed continuously and stably, ensuring the stability of the connection and effectively preventing loosening. When facing complex installation environments such as single-sided hollow walls, it can ensure safety and improve the reliability of fixation.

[0048] Furthermore, a latching tooth is provided on the end surface of the movable portion 21 that abuts against the screw rod 5 , and the latching tooth is conformably matched with the thread on the screw rod 5 .

[0049] Specifically, the latch teeth can closely match the screw thread of the screw 5, thereby enhancing the fixing effect of the wing member 2 on the screw 5. When the screw 5 is inserted into the sleeve and the wing member 2 is switched to the second state, the latch teeth are embedded in the screw thread of the screw 5, which not only increases the friction between the two, but also effectively limits the screw 5 in all directions, preventing the screw 5 from loosening or rotating due to external forces such as vibration and lateral tension, further improving the stability and reliability of the entire sleeve during use.

[0050] In an optional embodiment, an elastic protrusion may be provided on the end surface of the movable portion 21 abutting against the screw 5, and a groove matching the elastic protrusion may be processed on the surface of the screw 5, and the groove surrounds the circumference of the screw 5 and is spirally arranged along its axial direction. When the screw 5 is inserted and the wing 2 is unfolded, the elastic protrusion is snapped into the groove. The elasticity of the elastic protrusion can ensure that it can be smoothly snapped in during the installation process, and can withstand a certain external force during use to prevent the screw 5 from loosening.

[0051] Furthermore, a chamfer is provided at the connection between the movable portion 21 and the tank body 11 .

[0052] Specifically, the chamfering can make the movable part 21 rotate more smoothly in the groove body 11, reducing the stress concentration at the connection. When the screw 5 is inserted and applies force to the movable part 21 to promote its state conversion, the chamfering can effectively avoid damage to the connection part caused by the concentration of force, thereby improving the durability of the wing member 2 during use.

[0053] Furthermore, the groove body 11 extends along the axial direction of the sleeve body 1 , but is not disposed through the bottom of the sleeve body 1 .

[0054] Specifically, the groove 11 extends along the axial direction of the sleeve and does not penetrate the bottom, thereby preventing the sleeve body 1 from having structural weakness at the bottom, ensuring stability and connection firmness, and also ensuring the overall strength of the sleeve to prevent the wing 2 from being separated from the sleeve.

[0055] Furthermore, it also includes:

[0056] The moving member 3 is movably disposed in the groove body 11 . The moving member 3 is suitable for moving along the axial direction of the sleeve body 1 . The movable portion 21 is rotationally connected to the moving member 3 . The moving member 3 is provided with a through hole allowing the screw rod 5 to pass through.

[0057] It is easy to understand that the movable part 3 can move axially along the sleeve body 1, which increases the flexibility of the movable part 21 of the wing member 2. When the screw 5 is inserted, the movable part 3 can adaptively adjust the position according to the insertion depth and force of the screw 5, so as to more accurately guide the wing member 2 to switch from the first state to the second state. It can ensure that the wing member 2 applies a suitable and stable clamping force to the screw 5, and regardless of the dimensional tolerance of the screw 5, a good fixing effect can be achieved. The setting of the movable part 3 can ensure that at least two wing members 2 are fixed in position, so that the screw 5 is subjected to a uniform and symmetrical clamping force to avoid uneven force. When subjected to external force, the wing member 2 can be prevented from being displaced, ensuring continuous and stable clamping of the screw 5, enhancing the firmness and reliability of the connection, reducing safety hazards, and improving performance.

[0058] Specifically, the moving part 3 can be designed as a ring that matches the groove body 11, and the inner diameter is slightly larger than the outer diameter of the screw 5. The outer edge is symmetrically provided with a limit structure such as a slot or a bump, which cooperates with the movable part 21 of the wing member 2 to fix the radial position of the wing member 2. The upper and lower surfaces of the ring are provided with a guide structure, which cooperates with the inner wall of the groove body 11 to prevent the moving part 3 from rotating and stabilize the limit wing member 2.

[0059] In an optional embodiment, the moving member 3 can also be set as a U-shaped groove member, and a through hole is set on the connection of the U-shaped groove member away from the opening side, and the through hole is suitable for the screw 5 to pass through. The U-shaped groove member as the moving member 3 can stabilize the wing member 2 from both sides, so that the screw 5 is subjected to a uniform and accurate clamping force. When responding to external forces, it can prevent the wing member 2 from shaking, ensure a stable and reliable connection, and reduce looseness. Its bottom is parallel to the axial direction of the sleeve body 1 and is shorter than the groove body 11.

[0060] Furthermore, the moving member 3 is provided with a slot along the rotation direction of the movable portion 21 .

[0061] In detail, the slotting provides additional space for the rotation of the movable part 21, avoiding possible interference between the movable part 21 and the moving member 3 during the rotation process. When the screw 5 is inserted to push the movable part 21 of the wing member 2 to rotate, the slotting enables the movable part 21 to switch from the first state to the second state more smoothly, ensuring the flexibility and accuracy of the entire structural action. At the same time, the slotting can also reduce the weight of the moving member 3 to a certain extent, which is conducive to improving the response speed of the axial movement of the moving member 3 in the slot body 11, further optimizing the dynamic performance of the sleeve and the screw 5 when they cooperate, and enhancing the stability and reliability of the structure.

[0062] Specifically, the shape of the slot can be an arc, and its arc matches the rotation trajectory of the movable part 21. The depth and width of the slot should be determined according to the size of the movable part 21, and it is necessary to ensure that the movable part 21 has enough space during the rotation process, and at the same time, it should not affect the overall structural strength of the moving part 3. The edge of the slot can be chamfered or rounded to reduce the friction and collision between the movable part 21 and the slot edge during rotation, thereby extending the service life of the moving part 3 and the movable part 21.

[0063] Furthermore, it also includes:

[0064] A limiting groove, which is arranged along the axial direction of the sleeve body 1;

[0065] The limiting member 4 is rotatably disposed on the wing member 2, and the limiting member 4 is slidably disposed in the limiting groove.

[0066] It is easy to understand that the limit groove and the limit member 4 can improve the structural performance. The limit groove provides an axial movement path for the limit member 4. The limit member 4 rotates on the wing member 2 and slides in the limit groove, which can limit the range of motion of the wing member 2, ensure the stability of the clamping action, prevent the wing member 2 from excessive displacement or swinging when disturbed by external force, and enhance the structural reliability.

[0067] Specifically, the stop groove is an axially long and narrow groove on the tube wall of the sleeve body 1, and its depth and width are adapted to the stop member 4, and the inner wall is smooth. The stop member 4 is a small cylinder or prism connected to the rotating shaft of the wing member 2 at one end, and the other end is embedded in the stop groove, and its contact surface with the stop groove can be made of wear-resistant material or coating.

[0068] According to an embodiment of the present invention, on the other hand, there is further provided a bolt, comprising:

[0069] As the casing above;

[0070] The screw rod 5 is arranged in the sleeve body 1 .

[0071] Specifically, the screw 5 is arranged in the sleeve body 1, and during the insertion process, the screw 5 first contacts the moving part 3 in the sleeve. As the screw 5 goes deeper, the screw 5 begins to interact with the movable part 21 of the wing member 2, pushing the movable part 21 to rotate around its connection point with the moving part 3, so that the wing member 2 switches from a state parallel to the axial direction of the sleeve to a vertical state. In this process, the limiter 4 on the wing member 2 slides in the limiter groove of the sleeve, limiting the range of movement of the wing member 2 and ensuring that the wing member 2 accurately clamps the screw 5. The moving part 3 moves along the axial direction of the sleeve according to the insertion depth of the screw 5, providing adaptive adjustment for the movement of the wing member 2, and finally the screw 5 is stably fixed in the sleeve to form a firm connection.

[0072] In detail, Figure 5The method of fixing the decorative panel 7 to the building wall 6 with bolts provided in an embodiment of the present invention is demonstrated. The sleeve slot 11 is a movable guide for the wing 2. At the beginning of installation, the two wing members 2 are parallel to the sleeve axis along the slot 11, and the bolts can smoothly pass through the mounting hole of the decorative panel 7. When the screw 5 is inserted, the movable part 21 is chamfered to make the rotation smoother, and the movable part 3 moves axially. The connection with the movable part 21 and its own through-hole design ensure the adaptive adjustment of the wing 2. As the screw 5 goes deeper, the wing 2 turns to a vertical state, and the movable part 21 teeth cooperate with the screw 5 threads to generate friction and clamping force, and the wing 2 limiter 4 slides in the limit groove to stabilize the wing 2. The introduction part at the tail of the screw 5 is conducive to alignment and insertion, reducing the difficulty. The bolt can firmly connect the decorative panel 7 and the wall, resist vibration and displacement, and ensure the decorative effect and building safety.

[0073] Furthermore, a guide portion is provided at the tail of the screw 5 .

[0074] It is easy to understand that the setting of the introduction part can facilitate the alignment of the screw 5 with the sleeve, reduce the risk of collision damage to the structure inside the sleeve body 1 during insertion, reduce the initial insertion force, make the operation smoother and the installation efficiency higher, and protect the screw 5 to prevent its tail from deformation or damage.

[0075] Furthermore, the introduction portion is a tapered tip.

[0076] In other embodiments, the introduction portion may also be in the form of a chamfer with an arc to play a guiding role; or may be a spherical protrusion with a smooth surface and a rounded shape to reduce friction and adapt to the sleeve entrance.

[0077] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A casing, characterized in that: include: A sleeve body (1) has a groove (11) formed on the top of the tube wall, and the sleeve body (1) is suitable for assembling a screw rod (5); At least two wing members (2) are arranged on the groove body (11) in a relative manner, the wing member (2) comprises a movable portion (21) arranged at an end portion, and an expansion portion (22) extending in a direction away from the movable portion (21), the movable portion (21) is movably connected to the groove body (11), and the wing member (2) has a first state parallel to the axial direction of the sleeve body (1) and a second state perpendicular to the axial direction of the sleeve body (1); When the screw rod (5) is assembled in the sleeve body (1) and abuts against the movable part (21), a force is applied to the wing member (2) to switch from the first state to the second state, so that in the second state, the relatively arranged movable parts (21) respectively abut against the outer wall of the screw rod (5) and apply opposite clamping forces.

2. The sleeve according to claim 1, characterized in that The end surface of the movable portion (21) abutting against the screw rod (5) is provided with latching teeth, and the latching teeth are conformally matched with the threads on the screw rod (5).

3. The sleeve according to claim 2, characterized in that A chamfer is provided at the connection between the movable portion (21) and the trough body (11).

4. The sleeve according to any one of claims 1 to 3, characterized in that The groove body (11) extends along the axial direction of the sleeve body (1), but is not arranged to penetrate the bottom of the sleeve body (1).

5. The sleeve according to claim 4, characterized in that Also includes: A movable member (3) is movably arranged in the groove body (11), the movable member (3) is suitable for moving along the axial direction of the sleeve body (1), the movable part (21) is rotationally connected to the movable member (3), and the movable member (3) is provided with a through hole allowing the screw rod (5) to pass through.

6. The sleeve according to claim 5, characterized in that The moving member (3) is provided with a slot along the rotation direction of the movable part (21).

7. The sleeve according to claim 1, characterized in that Also includes: A limiting groove, which is arranged along the axial direction of the sleeve body (1); A limiting member (4) is rotatably disposed on the wing member (2), and the limiting member (4) is slidably disposed in the limiting groove.

8. A bolt, characterized in that: include: The sleeve as claimed in any one of claims 1 to 7; The screw rod (5) is arranged in the sleeve body (1).

9. The bolt according to claim 8, characterized in that The tail of the screw (5) is provided with an introduction portion.

10. The bolt according to claim 9, characterized in that The introduction portion is a tapered tip.

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