Expansion device capable of being quickly mounted and dismounted

Abstract

The utility model provides an expansion device capable of being quickly mounted and dismounted, which comprises a screw rod, a sleeve, a spring and a pressure spring pipe, the sleeve comprises a fixed pipe and at least one section of movable pipe, the fixed pipe is in threaded connection with a fixed section of the screw rod, two adjacent inclined surfaces of the fixed pipe and the movable pipe are tangent, and the movable pipe can slide on a movable section of the screw rod; when the spring is located on the right side of the movable pipe and contracts under external force, the sleeve is inserted into the hole along with the screw, and after the external force disappears, the spring recovers and extrudes the movable pipe leftwards, so that the movable pipe slides leftwards and expands with the fixed pipe in the hole in a staggered mode along the diagonal plane. The device is quick to mount and dismount, high in working efficiency and capable of protecting the wall, reducing damage and lowering the mounting and dismounting threshold.

Description

Technical Field

[0001] The utility model belongs to the technical field of fastening, and in particular relates to an expansion device that can be quickly installed and removed. Background Art

[0002] In the construction and installation fields, expansion bolts and hooks are essential connectors, widely used to secure various walls and components. However, with the continuous development of technology and increasing application demands, existing expansion bolts and hooks have gradually exposed some defects, especially during the installation and removal processes.

[0003] Specifically, traditional expansion bolts often require specialized tools for tightening and positioning during installation. These tools require specialized skills to use correctly, posing a significant challenge for non-professional users. Furthermore, the repeated adjustment and tightening required for expansion bolts consumes significant time and effort.

[0004] Even more serious is the difficulty of removing expansion bolts. Because the bolts tightly fit the wall, removal often requires prying or hammering with powerful tools, which not only damages the wall but can also cause irreversible damage to the bolts themselves. This method is not only inefficient but also significantly increases the user's workload and costs.

[0005] In summary, those skilled in the art are in urgent need of developing an expansion device that can be quickly installed and removed to solve the above problems and improve work efficiency. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the present invention provides an expansion device that can be quickly installed and removed to solve the problems in the background technology caused by the inconvenience, need for professional tools, time-consuming and labor-intensive installation and removal of expansion bolts, and slow speed.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A quickly installable expansion device comprising a screw, a sleeve, and a spring. The screw comprises a fixed section and a movable section. The sleeve comprises a fixed tube threadedly connected to the fixed section of the screw and at least one movable tube. Two adjacent inclined surfaces of the fixed tube and the movable tube are tangent to each other, and the movable tube can slide within the movable section of the screw.

[0009] The spring is located on the right side of the movable tube, and when it contracts under external force, the sleeve is inserted into the hole along with the screw. After the external force disappears, the spring recovers and squeezes the movable tube to the left, causing the movable tube to slide to the left and expand alternately with the fixed tube in the hole along the oblique surface.

[0010] In a possible implementation, a lifting ring is provided at the right end of the movable section of the screw rod, and the lifting ring is specifically circular or elliptical.

[0011] In a possible implementation, the device further includes a tensioning nut for adjusting the elastic force of the spring, the tensioning nut preventing the spring from moving rightward, and the tensioning nut is screwed onto the movable section of the screw, and the tensioning nut is located on the left side of the lifting ring.

[0012] In a possible implementation, the device further includes a compression spring tube, which is sleeved on the movable section of the screw and fixed at the right end of the movable tube;

[0013] The compression spring tube further includes a stopper, and the outer diameter of the stopper is greater than the diameter of the hole.

[0014] In a possible implementation, a group of symmetrically arranged finger rings are provided on the compression spring tube. When a finger is buckled into the finger ring and moved to the right, the spring contracts under the external pressure of the compression spring tube.

[0015] In a possible implementation, the device further includes a nut, which is located at an end of the screw fixing section and is threadedly connected to the screw.

[0016] In a possible implementation, the beveled surface at the right end of the fixed tube forms a right beveled angle, and the beveled surface at the left end of the movable tube forms a left beveled angle, and the left beveled angle is complementary to the right beveled angle.

[0017] In a possible implementation, the right oblique angle is α, and 15°≤α≤75°.

[0018] In a possible implementation, the inner diameter of the movable tube is larger than the diameter of the screw movable section.

[0019] In a possible implementation, the outer wall of the fixed tube and / or the movable tube has textures that increase adhesion. Beneficial effects

[0020] The present utility model provides an expansion device that can be quickly installed and removed. The device cleverly combines the design of a screw, a sleeve, a spring and a compression spring tube, which greatly improves the many inconveniences of traditional expansion bolts during installation and removal. Specifically, the sleeve in the device is composed of a fixed tube that is threadedly connected to the fixed section of the screw and at least one section of a movable tube. The two are tangent to each other through adjacent inclined surfaces, so that the movable tube can slide flexibly on the movable section of the screw. The setting of the spring makes it possible for the sleeve to be easily inserted into the hole along with the screw under the action of external force; and when the external force disappears, the spring recovers and pushes the movable tube to slide to the left, forming an effective staggered expansion with the fixed tube in the hole. The device is quick to install and remove, has high work efficiency, can also protect the wall, reduce damage, and lower the installation and removal threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic structural diagram of the expansion device in the non-expanded state in Example 1;

[0023] Figure 2 This is a front view of the structure of the expansion device in the non-expanded state in Example 1;

[0024] Figure 3 This is a structural schematic diagram of the expansion state of the expansion device in Example 2;

[0025] Figure 4 This is a front view of the structure of the expansion device in the expanded state in Example 1;

[0026] 1-screw, 2-sleeve; 21-fixed tube; 22-movable tube; 3-spring; 4-compression spring tube; 41-stopper; 5-nut; 6-tensioning nut. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, for the convenience of description below, the "upper", "lower", "left", and "right" quoted are the same as the upper, lower, left, and right directions of the drawings themselves. The "first", "second", etc. in the following are distinguished for the description and have no other special meanings.

[0028] In response to the problems existing in the prior art, the utility model provides an expansion device that can be quickly installed and removed. The device includes a screw, a sleeve and a spring. The screw includes a fixed section and a movable section. The sleeve includes a fixed tube threadedly connected to the fixed section of the screw, and at least one section of movable tube. The two adjacent inclined surfaces of the fixed tube and the movable tube are tangent, and the movable tube can slide in the movable section of the screw. The spring is located on the right side of the movable tube, and when it is contracted by external force, the sleeve is inserted into the hole along with the screw. After the external force disappears, the spring recovers and squeezes the movable tube to the left, causing the movable tube to slide to the left and expand alternately with the fixed tube along the inclined surface in the hole.

[0029] In specific application scenarios, the expansion device, based on the design of a screw, sleeve, spring, and compression spring tube, achieves the function of rapid installation and removal. The device relies on the elastic force of the spring and the tangent design of the inclined plane between the movable tube and the fixed tube. When an external force acts on the compression spring tube, the spring is compressed and contracts, so that the movable tube and the fixed tube do not form an intersection, thereby facilitating the rapid insertion or removal of the sleeve from the hole. After the external force disappears, the spring recovers and pushes the movable tube to slide to the left, forming an interlaced expansion with the fixed tube in the hole, generating a strong expansion force that firmly anchors the device to the wall.

[0030] When installing the expansion device, you first need to drill a hole of the appropriate size in the wall. Next, insert your finger into the finger ring on the compression spring tube and squeeze the spring to the right to compress it. At this time, the movable tube will not slide to the left and intersect with the fixed tube, allowing the sleeve to be quickly and smoothly inserted into the hole. Afterwards, remove your finger from the finger ring, and the spring will recover by its own elastic force, squeezing the movable tube to the left, causing it to slide to the left under the action of the spring and expand along the oblique surface with the fixed tube in the hole. Ultimately, the expansion device generates a powerful expansion force inside the wall, firmly anchored in the wall, and not easily loosened or falling off.

[0031] When the expansion device needs to be disassembled, just put your finger into the finger ring of the compression spring tube again, squeeze the spring to the right to compress it, and the movable tube will slide to the right and no longer form an interlaced expansion with the fixed tube. At this time, the sleeve can be quickly and smoothly pulled out of the hole to complete the disassembly.

[0032] Furthermore, the movable section is a smooth cylinder. This reduces frictional resistance when the movable tube slides on the screw, allowing the movable tube to move more quickly and smoothly on the screw. It also makes the movable tube more stable during sliding, reducing vibration and deviation caused by friction, thereby enhancing the stability and reliability of the device.

[0033] In some examples, a lifting ring is provided at the right end of the movable section of the screw rod, and the lifting ring prevents the spring sleeved on the movable section of the screw rod from moving rightward.

[0034] In specific application scenarios, the addition effectively blocks the rightward movement of the spring on the active section of the screw, thereby preventing the spring from falling due to external forces during installation or use, ensuring the integrity and stability of the device structure. Furthermore, the lifting ring, acting as a spring barrier, not only prevents the spring from falling but also limits excessive spring compression to a certain extent, avoiding damage to the device or safety hazards caused by excessive spring compression.

[0035] In addition, the addition of lifting rings not only enhances the structural stability and safety of the device, improves installation efficiency and maintenance convenience, but also significantly facilitates workers' operations, reduces operating difficulty and physical exertion.

[0036] In some examples, the hanging ring is specifically circular or oval.

[0037] In specific application scenarios, the lifting ring can be not only circular or elliptical, but also other shapes. While ensuring that the working performance of the expansion device is not affected, technical personnel in this field can select the shape of the lifting ring according to actual needs. Changes in the shape of the lifting ring do not affect the scope of protection of this application.

[0038] In some examples, the device further includes a tensioning nut for adjusting the elastic force of the spring, the tensioning nut preventing the spring from moving rightward, and the tensioning nut is screwed onto the movable section of the screw, and the tensioning nut is located on the left side of the lifting ring.

[0039] In specific application scenarios, when the spring is used for a long time, the elastic force will inevitably weaken. At this time, the operator can maintain the spring force by turning the tensioning nut to the left, thereby extending the service life of the device and reducing costs.

[0040] In some examples, the device also includes a compression spring tube, which is inserted into the movable section of the screw and fixed at the right end of the movable tube; a group of symmetrically arranged finger rings are provided on the compression spring tube, and the fingers are buckled into the finger rings and moved to the right, so that the spring contracts under the external pressure of the compression spring tube.

[0041] In specific application scenarios, the addition of a compression spring tube allows users to more conveniently control the contraction of the spring. By buckling their fingers into the finger ring and moving it to the right, the spring can be contracted under the external pressure of the compression spring tube. This operation does not require additional tools, greatly simplifying the installation and disassembly process.

[0042] Furthermore, because the compression spring tube can easily control the contraction of the spring, the sleeve can be more easily inserted into the hole along with the screw. This reduces the time and effort required for installation, improves installation efficiency, and enhances the user experience.

[0043] Furthermore, the material of the compression spring tube is not limited to plastic or metal. When the compression spring section is made of plastic, it is specifically made of PVC. PVC as the material of the compression spring tube has the advantages of being light, strong, corrosion-resistant, easy to process, low-cost, environmentally friendly, and having good insulation properties.

[0044] Furthermore, the compression spring tube also includes a stopper, the outer diameter of which is larger than the diameter of the hole. By adding the stopper, the compression spring tube is prevented from sinking into the hole.

[0045] In some examples, the device further includes a nut located at an end of the screw fixing section and threadedly connected to the screw.

[0046] In specific application scenarios, the nut is located at the end of the screw fixing section and is threadedly connected to the screw. This not only effectively blocks external dust, impurities and water vapor from entering the device, reduces component wear and corrosion, and extends service life, but also protects the screw from damage, enhances the stability of the fixed tube, and facilitates device maintenance and replacement.

[0047] In some examples, the chamfered surface at the right end of the fixed tube forms a right bevel angle, and the chamfered surface at the left end of the movable tube forms a left bevel angle, and the left bevel angle is complementary to the right bevel angle.

[0048] In specific application scenarios, the complementary right and left bevels enable effective staggered expansion of the movable and fixed tubes within the hole. This not only distributes the expansion force more evenly, improving the expansion effect and tightening strength, but also reduces resistance and time consumption during installation and removal, making the installation and removal process smoother and faster.

[0049] Furthermore, expansion grooves are provided on the beveled sides of the fixed tube and the movable tube. During the expansion process, the fixed tube or movable tube divided into several pieces by the expansion groove will expand outward after being squeezed, which further increases the contact area and friction with the wall, thereby improving the fastening force and stability of the device.

[0050] In some examples, the right bevel angle is α, and 15°≤α≤75°. When the right bevel angle α is in the range of 15 to 75°, a stable mechanical structure can be formed when the movable tube and the fixed tube are staggered and expanded, so that the expansion force is evenly distributed on the entire device, thereby improving the bearing capacity and stability of the device.

[0051] In some examples, the inner diameter of the movable tube is larger than the diameter of the movable section of the screw.

[0052] In specific application scenarios, the difference between the inner diameter of the movable tube and the diameter of the screw's active section is H, where 1mm ≤ H ≤ 5mm. This allows the screw to slide smoothly within the movable tube, reducing installation difficulties and improving installation efficiency. It also optimizes expansion performance and enhances the device's fastening force and stability.

[0053] In some examples, the outer wall of the fixed tube and / or the movable tube has textures that increase adhesion.

[0054] In specific application scenarios, by adding textures on the outer walls of the fixed tube and the movable tube, the adhesion and friction are improved, so that the expansion device can be more firmly fixed to the wall hole after installation, effectively reducing the risk of loosening. Example 1

[0055] Based on the above concept, Figure 1-2 As shown, this embodiment provides an expansion device for a specific application, such as Figure 1 As shown, the device includes a screw 1, a sleeve 2 and a spring 3. The screw 1 includes a fixed section and a movable section. The sleeve 2 includes a fixed tube 21 threadedly connected to the fixed section of the screw 1, and a movable tube 22. The adjacent inclined surfaces of the fixed tube 21 and the movable tube 22 are tangent, and the movable tube 22 can slide in the movable section of the screw 1. Figure 2 As shown, the spring 3 is located on the right side of the movable tube 22, and when it contracts under external force, the sleeve 2 is inserted into the hole along with the screw 1.

[0056] In the example, Figure 2 As shown, a circular lifting ring is provided at the right end of the movable section of the screw rod 1 .

[0057] In the example, the device also includes a tensioning nut 6 for adjusting the elastic force of the spring 3. The tensioning nut 6 blocks the spring 3 from moving rightward and is screwed onto the movable section of the screw rod 1. The tensioning nut 6 is located on the left side of the lifting ring.

[0058] In the example, Figure 1 As shown, the device also includes a compression spring tube 4, which is sleeved on the movable section of the screw 1 and fixed to the right end of the movable tube 22;

[0059] The compression spring tube 4 further includes a stopper 41 , the outer diameter of which is larger than the diameter of the hole.

[0060] In the example, Figure 1 As shown, a group of symmetrically arranged finger rings are provided on the compression spring tube 4. When a finger is buckled into the finger ring and moved to the right, the spring 3 contracts under the external pressure of the compression spring tube 4.

[0061] In the example, Figure 2 As shown, the device further includes a nut 5 , which is located at the end of the fixed section of the screw rod 1 and is threadedly connected to the screw rod 1 .

[0062] In this example, the chamfered surface at the right end of the fixed tube 21 forms a right bevel angle, and the chamfered surface at the left end of the movable tube 22 forms a left bevel angle, which are complementary to the right bevel angle, wherein the right bevel angle α is 25°.

[0063] In the example, the inner diameter of the movable tube 22 is larger than the diameter of the movable section of the screw 1 . Example 2

[0064] Based on the above concept, Figure 3-4 As shown, this embodiment provides an expansion device for a specific application, such as Figure 3 As shown, the device includes a screw 1, a sleeve 2 and a spring 3. The screw 1 includes a fixed section and a movable section. The sleeve 2 includes a fixed tube 21 threadedly connected to the fixed section of the screw 1, and two movable tubes 22. The adjacent inclined surfaces of the fixed tube 21 and the movable tube 22 are tangent, and the movable tube 22 can slide in the movable section of the screw 1; Figure 4 As shown, the spring 3 is located on the right side of the movable tube 22. After the external force disappears, the spring 3 recovers and squeezes the movable tube 22 to the left, causing the movable tube 22 to slide leftward and expand in a staggered manner with the fixed tube 21 in the hole along the oblique surface.

[0065] In the example, Figure 3 As shown, a circular lifting ring is provided at the right end of the movable section of the screw rod 1, and the lifting ring prevents the spring 3 sleeved on the movable section of the screw rod 1 from moving rightward.

[0066] In the example, the device also includes a tensioning nut 6 for adjusting the elastic force of the spring 3. The tensioning nut 6 blocks the spring 3 from moving rightward and is screwed onto the movable section of the screw rod 1. The tensioning nut 6 is located on the left side of the lifting ring.

[0067] In the example, Figure 3 As shown, the device also includes a compression spring tube 4, which is sleeved on the movable section of the screw 1 and fixed to the right end of the movable tube 22;

[0068] The compression spring tube 4 further includes a stopper 41 , the outer diameter of which is larger than the diameter of the hole.

[0069] In the example, Figure 3 As shown, the device further includes a nut 5 , which is located at the end of the fixed section of the screw rod 1 and is threadedly connected to the screw rod 1 .

[0070] In this example, the chamfered surface at the right end of the fixed tube 21 forms a right bevel angle, and the chamfered surface at the left end of the movable tube 22 forms a left bevel angle, which are complementary to the right bevel angle, wherein the right bevel angle α is 25°.

[0071] In the example, the inner diameter of the movable tube 22 is larger than the diameter of the movable section of the screw 1 .

[0072] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A rapidly installable expansion device, characterized in that: The device comprises a screw (1), a sleeve (2) and a spring (3); the screw (1) comprises a fixed section and a movable section; the sleeve (2) comprises a fixed tube (21) threadedly connected to the fixed section of the screw (1) and at least one movable tube (22); two adjacent inclined surfaces of the fixed tube (21) and the movable tube (22) are tangent to each other; and the movable tube (22) can slide on the movable section of the screw (1); The spring (3) is located on the right side of the movable tube (22), and when it contracts under external force, the sleeve (2) is inserted into the hole along with the screw (1). After the external force disappears, the spring (3) recovers and squeezes the movable tube (22) to the left, causing the movable tube (22) to slide to the left and expand in an alternating manner with the fixed tube (21) along the oblique surface in the hole.

2. The expansion device according to claim 1, characterized in that A lifting ring is provided at the right end of the movable section of the screw rod (1), and the lifting ring is specifically circular or elliptical.

3. The expansion device according to claim 2, characterized in that The device further comprises a tensioning nut (6) for adjusting the elastic force of the spring (3), wherein the tensioning nut (6) blocks the spring (3) from moving rightward and is screwed onto the movable section of the screw rod (1). The tensioning nut (6) is located on the left side of the lifting ring.

4. The expansion device according to claim 1, characterized in that The device further comprises a compression spring tube (4), which is sleeved on the movable section of the screw rod (1) and fixed to the right end of the movable tube (22); The compression spring tube (4) further comprises a stopper (41), wherein the outer diameter of the stopper (41) is greater than the diameter of the hole.

5. The expansion device according to claim 4, characterized in that A group of symmetrically arranged finger rings are provided on the compression spring tube (4). When a finger is buckled into the finger ring and moved to the right, the spring (3) contracts under the external pressure of the compression spring tube (4).

6. The expansion device according to claim 1, characterized in that The device further comprises a nut (5), which is located at the end of the fixed section of the screw rod (1) and is threadedly connected to the screw rod (1).

7. The expansion device according to claim 1, characterized in that The chamfered surface at the right end of the fixed tube (21) forms a right bevel angle, and the chamfered surface at the left end of the movable tube (22) forms a left bevel angle, and the left bevel angle is complementary to the right bevel angle.

8. The expansion device according to claim 7, characterized in that The right oblique angle is α, and 15°≤α≤75°.

9. The expansion device according to claim 7, characterized in that The inner diameter of the movable tube (22) is larger than the diameter of the movable section of the screw (1).

10. The expansion device according to claim 7, characterized in that Textures for increasing adhesion are provided on the outer wall of the fixed tube (21) and / or the movable tube (22).

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