Sleeve and bolt

Abstract

The utility model relates to the technical field of bolt assembly, and discloses a casing pipe and a bolt, the casing pipe comprises a casing pipe body, the top of the pipe wall is provided with a groove body, and a screw rod is suitable for being assembled in the casing pipe 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; according to the utility model, 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 the looseness 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 utility model relates to the technical field of bolt assembly, in particular to a sleeve and a bolt. Background Art

[0002] An expansion bolt is a mechanical component used for fastening connections. It consists of a head, a screw, and an expansion section. It mates with a nut. The screw is threaded, and the expansion section has a sleeve. During installation, a hole is drilled in the base, the bolt is inserted into the hole, the part to be secured is placed, and the nut is tightened. The nut expands and locks the sleeve into the hole. These bolts are commonly used in construction, machinery installation, and home renovation.

[0003] However, when facing a hollow wall on one side, the expansion portion of the expansion bolt has no effective support in the hollow area and is secured only by the friction of the solid portion on one side. When subjected to stress, especially lateral tension or vibration, it is very easy to loosen, shift, or even fall out, resulting in fixation failure and compromising safety. Although there are existing anti-loosening bolts with internal springs that secure the bolts by the spring's elastic pressure, the springs are prone to elastic fatigue due to long-term pressure and vibration. Changes in the spring's elasticity can destabilize the pressure on the bolts, affecting the anti-loosening effect. Utility Model Content

[0004] In view of this, the utility model 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;

[0007] At least two wing members are disposed on the trough body in an opposite manner, the wing members include a movable portion disposed at an end thereof and an expanded portion extending away from the movable portion, the movable portion being movably connected to the trough body, the wing members having 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 to switch from the first state to the second state, so that in the second state, the relatively arranged movable parts respectively abut against the outer wall of the screw 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 trough body.

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

[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 is formed at the top of the sleeve body wall. The wing members are relatively arranged on the slot body. The movable portion thereof can be movably connected at the slot body, and there are 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 portion, the wing member switches from the first state to the second state. At this time, the relative movable portions respectively abut against the outer wall of the screw and apply opposite clamping forces. Compared with traditional anti-loosening bolts, the spring inside the traditional anti-loosening bolt is prone to elastic fatigue due to long-term pressure and vibration. Changes in the 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. There is no problem of anti-loosening failure due to fatigue of the elastic element. The screw 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.

[0020] In a second aspect, the utility model provides a bolt, comprising:

[0021] a cannula 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 utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a front view of a sleeve according to an embodiment of the present utility model;

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

[0028] Figure 3 A schematic cross-sectional view of a bolt in a working state according to an embodiment of the present invention;

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

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

[0031] Description of reference numerals:

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

[0033] 2. Wings; 21. Active portion; 22. Expanding portion;

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

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions 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 embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.

[0036] The following combination Figures 1 to 5 , describing the embodiments of the present utility model.

[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 the screw 5;

[0039] At least two wing members 2 are arranged on the groove body 11 relative to each other. The wing members 2 include 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 members 2 have 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 axially defined groove 11 in the sleeve provides space and guidance for the wing members 2. When inserted into the drill hole, the wing members 2 are aligned along the length of the groove 11, without adding any additional radial dimension, facilitating insertion. The screw 5 is inserted axially into the sleeve body 1 and contacts the wing members 2, pushing them to rotate to their second, vertical position. The groove 11 stabilizes the wing members 2, ensuring that the movable portion 21 accurately abuts and clamps against the outer wall of the screw 5, thereby ensuring stability, reducing damage from external forces, 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 contact with or nearly in contact with the tube wall, and is in a retracted 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 appearance of the sleeve body 1, 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 rotated to trigger the change in the state of the wing 2.

[0043] In the second state, the wing 2 is axially perpendicular to the sleeve body 1. At this time, the movable portion 21 of the wing 2 rotates to a vertical position around its connection point with the sleeve body 1 under the abutment and push of the screw 5. The relatively arranged movable portions 21 are in close contact with the outer wall of the screw 5. Due to the symmetrical distribution of the wing 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 action provided by the wing 2 can ensure the stability of the connection, ensuring that the structure is safer and more reliable when used in construction, mechanical installation, home decoration and other fields.

[0044] Specifically, one end of the wing 2 is a movable portion 21, which is movably connected to the trough 11. This allows the wing 2 to flexibly rotate around the connection point, allowing it to switch between different states. The movable portion 21 ensures that the wing 2 can smoothly change position while also being able to withstand and transmit force to a certain extent.

[0045] It should be noted that in this embodiment, there are two wing members 2. These two symmetrical wing members 2 can evenly apply clamping force to the screw 5 from opposite directions, stabilizing the position of the screw 5 and preventing deviation, thereby ensuring connection accuracy and reliability. This offers the advantages of simple design and manufacturing, low cost, straightforward assembly, and ease of 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 provides stronger clamping force, better wrapping around the screw 5, and the ability to disperse external forces, making the assembly more robust when subjected to large dynamic loads or complex load-bearing environments (such as heavy machinery and large bridge bolt connections). However, this results in a complex structure, increased manufacturing difficulty and cost, and multiple wing members 2 can easily interfere with each other, occupying a large space and being unsuitable for installation where space is limited. In practical applications, the assembly can be selected and produced as needed.

[0047] The sleeve provided by the embodiment of the present invention includes a sleeve body 1 and at least two wing members 2. The top of the sleeve body 1 has a groove body 11. The wing members 2 are relatively arranged on the groove body 11, and their movable parts 21 can be movably connected to the groove body 11, and have 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 the movable part 21, the wing member 2 switches from the first state to the second state. At this time, the relative movable parts 21 respectively abut the outer wall of the screw 5 and apply opposite clamping forces. Compared with traditional anti-loosening bolts, the spring inside the traditional anti-loosening bolt is prone to elastic fatigue due to long-term pressure and vibration. The change in spring elasticity will make the pressure on the bolt unstable, affecting the anti-loosening effect. However, this sleeve uses a mechanical structure to clamp the screw 5. There is no problem of anti-loosening failure caused by fatigue of the elastic element. It can continuously and stably fix the screw 5, ensure the stability of the connection, and effectively prevent 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 contacts the screw rod 5 , and the latching tooth is conformally matched with the thread on the screw rod 5 .

[0049] Specifically, the latching teeth tightly mate with the threads of the screw 5, enhancing the securing 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 latching teeth engage with the threads of the screw 5, not only increasing the friction between the two but also effectively limiting 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 alternative embodiment, an elastic protrusion can be provided on the end surface of the movable portion 21 where it abuts the screw 5, and a groove can be machined on the surface of the screw 5 to mate with the elastic protrusion. The groove surrounds the circumference of the screw 5 and is arranged in a spiral pattern along its axial direction. When the screw 5 is inserted and the wings 2 are deployed, the elastic protrusion snaps into the groove. The elasticity of the elastic protrusion ensures smooth insertion during installation and can withstand certain external forces during use, preventing 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 chamfers allow the movable portion 21 to rotate more smoothly within the trough 11, reducing stress concentration at the connection. When the screw 5 is inserted and applies force to the movable portion 21 to cause its state transition, the chamfers effectively prevent damage to the connection caused by concentrated 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 arranged to pass through the bottom of the sleeve body 1 .

[0054] Specifically, the groove 11 extends along the axial direction of the sleeve and does not pass through the bottom, thereby preventing the bottom of the sleeve body 1 from being structurally weak, ensuring stability and connection firmness, and also ensuring the overall strength of the sleeve to prevent the fins 2 from separating from the sleeve.

[0055] Furthermore, it also includes:

[0056] The moving member 3 is movably disposed in the groove body 11 and 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, and a through hole is provided on the moving member 3 for allowing the screw 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 movable member 3 can be designed as an annular shape that fits within the trough 11, with an inner diameter slightly larger than the outer diameter of the screw 5. Positioning structures, such as retaining grooves or bumps, are symmetrically arranged along its outer edge to engage with the movable portion 21 of the wing member 2 to secure the radial position of the wing member 2. Guide structures are provided on the upper and lower surfaces of the annular shape, engaging with the inner wall of the trough 11 to prevent the movable member 3 from rotating and stabilize the wing member 2.

[0059] In an alternative embodiment, the movable member 3 can be configured as a U-shaped channel. A through-hole is provided at the connection point of the U-shaped channel away from the opening, which is suitable for the screw 5 to pass through. The U-shaped channel as the movable member 3 can stabilize the wing member 2 from both sides, ensuring uniform and accurate clamping force on the screw 5. It can prevent the wing member 2 from shaking when responding to external forces, ensuring a stable and reliable connection and reducing loosening. Its bottom is parallel to the axial direction of the sleeve body 1 and is shorter than the channel body 11.

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

[0061] Specifically, the slots provide additional space for the rotation of the movable portion 21, thereby avoiding interference that may occur between the movable portion 21 and the movable member 3 during the rotation process. When the screw 5 is inserted into the movable portion 21 of the push-wing member 2 to rotate, the slots enable the movable portion 21 to more smoothly complete the switch from the first state to the second state, thereby ensuring the flexibility and accuracy of the entire structural movement. At the same time, the slots can also reduce the weight of the movable member 3 to a certain extent, which is conducive to improving the response speed of the axial movement of the movable 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 slot can be arc-shaped, with its curvature matching the rotational trajectory of the movable portion 21. The slot's depth and width are determined based on the dimensions of the movable portion 21, ensuring sufficient space for the movable portion 21 during rotation while not compromising the overall structural strength of the movable member 3. The slot's edges can be chamfered or rounded to reduce friction and collision between the movable portion 21 and the slot's edges during rotation, thereby extending the service life of the movable member 3 and the movable portion 21.

[0063] Furthermore, it also includes:

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

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

[0066] As can be easily understood, the limiting groove and limiting member 4 can improve structural performance. The limiting groove provides an axial motion path for the limiting member 4. The limiting member 4 rotates on the wing member 2 and slides in the limiting groove, which can limit the range of motion of the wing member 2, ensure stable clamping action, prevent excessive displacement or swing of the wing member 2 when disturbed by external forces, and enhance structural reliability.

[0067] Specifically, the stopper groove is an axially narrow groove in the wall of the sleeve body 1, with a depth and width that matches the stopper 4 and a smooth inner wall. The stopper 4 is a small cylindrical or prism-shaped object connected to the rotating shaft of the wing member 2 at one end and embedded in the stopper groove at the other end. The contact surface between the stopper and the stopper groove can be made of a wear-resistant material or coating.

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

[0069] As the casing above;

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

[0071] Specifically, the screw 5 is arranged in the sleeve body 1. During the insertion process, the screw 5 first contacts the movable 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 2, pushing the movable part 21 to rotate around its connection point with the movable part 3, so that the wing 2 switches from a state parallel to the axis of the sleeve to a vertical state. During this process, the limiting part 4 on the wing 2 slides in the limiting groove of the sleeve, limiting the range of movement of the wing 2 and ensuring that the wing 2 accurately clamps the screw 5. The movable 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 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 utility model is demonstrated. The sleeve groove 11 is a movable guide for the wing 2. At the beginning of installation, the two wings 2 are parallel to the sleeve axis along the groove 11, and the bolt 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 thread to generate friction and clamping force. The wing 2 limiter 4 slides in the limit groove to stabilize the wing 2. The guide part at the tail of the screw 5 is convenient for 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, an introduction 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 avoid deformation or damage to its tail.

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

[0076] In other embodiments, the introduction portion may also be in the form of a chamfered arc to serve as a guide; 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 with reference to 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 shall fall within the scope defined by the appended claims.

Claims

1. A casing, characterized in that: include: The 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 (5); At least two wing members (2) are arranged on the groove body (11) relative to each other, the wing members (2) comprising 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) being movably connected to the groove body (11), and the wing members (2) having 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 (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 (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 a latching tooth, and the latching tooth is conformally matched with the thread 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 moving member (3) is movably arranged in the groove body (11), and 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), and the moving member (3) is provided with a through hole allowing the screw (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 portion (21).

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

8. A bolt, characterized in that: include: The sleeve according to any one of claims 1 to 7; The screw (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.

Images