Detachable expansion bolt
By designing a detachable expansion bolt structure, the expansion bolt can be non-destructively removed by utilizing the change in the rotation direction of the nut, thus solving the problem that the existing expansion bolts are difficult to remove and improving the disassembly and assembly efficiency.
Patent Information
- Application Number
- CN202422857875.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing expansion bolts are difficult to remove effectively, making disassembly difficult and potentially damaging the building surface.
A detachable expansion bolt structure including a screw, a push nut, a sleeve, a lower wedge block and an upper wedge block is designed. The expansion bolt can be non-destructively removed by changing the rotation direction of the nut.
The expansion bolts can be conveniently disassembled and assembled, the disassembly and assembly efficiency is improved, and damage to the building surface is avoided.
Smart Images
Figure CN223330913U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of building construction auxiliary structures, in particular to a detachable expansion bolt. Background Art
[0002] Expansion bolts are widely used in industries such as construction and fencing, equipment mounting, and home renovation. Conventional expansion bolts typically consist of a bolt, expansion sleeve, washer, and nut. Installation is extremely convenient: simply drill a hole in the building surface with an electric drill, insert the bolt into the hole, attach the component to be secured, and tighten the nut. The expansion cone on the larger end of the bolt interacts with the expansion sleeve, expanding the sleeve and securing it to the building, thereby securing the component to the structure.
[0003] Expansion bolts achieve expansion and anchoring by forming a self-locking surface between the expansion cone at the inner end of the bolt, the expansion sleeve, and the building. They generally tighten the further they are pulled, making them very difficult to remove. While expansion bolts are easy to install, removing them from a building is extremely difficult. Modern urban infrastructure requires significant investment, and fencing construction is often required. Expansion bolts are extremely difficult to remove during fencing removal, as forced pulling can cause the building surface to collapse and leave scars. Therefore, most methods use grinding to directly cut the bolts. However, this method is not only labor-intensive and time-consuming, but also difficult to achieve a surface level finish consistent with the original ground.
[0004] Therefore, it is urgent to design a detachable expansion bolt. Utility Model Content
[0005] The purpose of the utility model is to overcome the problems of the prior art and disclose a detachable expansion bolt, which can realize the effective and non-destructive removal of the expansion bolt through the structural arrangement of the bolt.
[0006] The purpose of this utility model is achieved through the following technical solutions:
[0007] A detachable expansion bolt, comprising: a screw rod, a push nut, a sleeve, a lower wedge block and an upper wedge block;
[0008] A push nut is provided in the middle of the screw, the sleeve is sleeved on the screw, and the sleeve is fixedly connected to the push nut;
[0009] The lower wedge block is arranged on the other side of the sleeve and contacts the top of the sleeve, and a groove is provided on the lower wedge block, and the screw is arranged in the groove body of the lower wedge block;
[0010] A spring is sleeved on the outside of the sleeve, and both ends of the spring are connected to the lower wedge block and the push nut respectively;
[0011] An upper wedge block is provided on the other side of the lower wedge block. The wedge-shaped inclined surfaces of the upper wedge block and the lower wedge block match each other, and the upper wedge block is fixedly connected to the screw rod.
[0012] According to a preferred embodiment, when the expansion bolts are fixed, the upper wedge block and the lower wedge block are located in the hole in the wall, and the push nut is configured to be screwed in the direction of the upper wedge block.
[0013] According to a preferred embodiment, when the expansion bolt is removed, the push nut is configured to be screwed in a direction away from the upper wedge block.
[0014] According to a preferred embodiment, a locking nut is further provided in the middle of the screw rod, and when the expansion bolt is fixed, the locking nut contacts and connects with the push nut.
[0015] According to a preferred embodiment, the screw rod is further provided with a nut, which is located on a side of the locking nut away from the push nut.
[0016] According to a preferred embodiment, the outer surfaces of the lower wedge-shaped block and the upper wedge-shaped block are provided with a corrugated ridge structure.
[0017] According to a preferred embodiment, the upper wedge block and the screw are connected by integral molding or welding.
[0018] According to a preferred embodiment, both ends of the spring are respectively connected to the lower wedge block and the push nut by welding.
[0019] The aforementioned main solution and its various further options can be freely combined to form multiple solutions, all of which are solutions that can be adopted and protected by this utility model. After understanding the solution of this utility model, those skilled in the art will understand that there are many combinations based on existing technology and common knowledge, all of which are technical solutions to be protected by this utility model, and these are not exhaustive here.
[0020] Beneficial effects of the utility model:
[0021] Through the structural setting of the bolts in the present application, effective and non-destructive removal of the expansion bolts is achieved, which not only makes disassembly and assembly convenient, but also improves disassembly and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a structural diagram of the detachable expansion bolt of the utility model;
[0023] Among them, 101-nut, 102-screw, 103-locking nut, 104-thrust nut, 105-spring, 106-sleeve, 107-lower wedge block, 108-upper wedge block, 109-wall hole. DETAILED DESCRIPTION
[0024] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.
[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0028] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0029] In addition, the present invention should point out that, in the present invention, unless the specific structure, connection relationship, position relationship, power source relationship, etc. are specifically written out, the structure, connection relationship, position relationship, power source relationship, etc. involved in the present invention are all known to those skilled in the art based on the existing technology without creative work.
[0030] Example 1:
[0031] refer to Figure 1 As shown in the figure, a detachable expansion bolt is shown, which includes: a screw rod 102, a push nut 104, a sleeve 106, a lower wedge block 107 and an upper wedge block 108.
[0032] A push nut 104 is provided in the middle of the screw rod 102 , and the sleeve 106 is sleeved on the screw rod 102 , and the sleeve 106 is fixedly connected to the push nut 104 ;
[0033] The lower wedge block 107 is provided on the other side of the sleeve 106 and contacts the sleeve 106. The lower wedge block 107 is provided with a groove, and the screw 102 is provided in the groove of the lower wedge block 107.
[0034] The outer side of the sleeve 106 is also sleeved with a spring 105, and the two ends of the spring 105 are respectively connected to the lower wedge block 107 and the push nut 104;
[0035] An upper wedge block 108 is provided on the other side of the lower wedge block 107 . The wedge-shaped inclined surfaces of the upper wedge block 108 match those of the lower wedge block 107 , and the upper wedge block 108 is fixedly connected to the screw rod 102 .
[0036] Preferably, when the expansion bolts are fixed, the upper wedge block 108 and the lower wedge block 107 are located in the wall hole 109 , and the push nut 104 is configured to be screwed toward the upper wedge block 108 .
[0037] Furthermore, when the expansion bolt is removed, the push nut 104 is configured to be screwed in a direction away from the upper wedge block 108 .
[0038] Preferably, a locking nut 103 is further provided in the middle of the screw rod 102 . When the expansion bolt is fixed, the locking nut 103 contacts and contacts the push nut 104 .
[0039] Preferably, a nut 101 is further provided on the screw rod 102 and is located on a side of the locking nut 103 away from the push nut 104 .
[0040] Preferably, the outer surfaces of the lower wedge block 107 and the upper wedge block 108 are provided with a corrugated ridge structure. By providing the ridge structure, the connection tightness between the expansion bolt and the wall is improved.
[0041] Preferably, the upper wedge block 108 and the screw rod 102 are connected by integral molding or welding.
[0042] Preferably, both ends of the spring 105 are welded to the lower wedge block 107 and the push nut 104 respectively.
[0043] The working principle of the detachable expansion bolt in this application:
[0044] (1) When the detachable expansion bolt is in the initial state, the lower wedge block 107 and the upper wedge block 108 are in a separated state, and the spring 105 is in a natural state.
[0045] (2) When the bolt penetrates into the hole in the wall, the push nut 104 is rotated inward, and the push nut 104 pushes the sleeve 106 so that it has a tendency to move deeper into the hole. After the push nut 104 contacts the wall, the screw rod 102 moves outward, causing the lower wedge block 107 and the upper wedge block 108 at the end of the screw rod to move toward each other. After the lower wedge block 107 and the upper wedge block 108 begin to contact, the lower wedge block 107 begins to move outward along the radial direction of the screw rod 102 due to the action of the wedge surface. After the lower wedge block 107 contacts the hole wall, the push nut 104 is screwed in 3-5mm. At this time, the lower wedge block 107 and the upper wedge block 108 have a tightening effect on the hole wall, and then the locking nut 103 is screwed to a position close to the push nut 104 to complete the fixing of the bolt to the wall.
[0046] (3) When the exterior work is completed and the bolts need to be removed, first screw the locking nut 103 outward for a distance, then screw the push nut 104 outward. At this time, the sleeve 106 moves outward from the hole under the drive of the push nut 104 and disengages from the lower wedge block 107. The spring 105 is in a stretched state and begins to pull the lower wedge block 107 outward from the hole. Continue to screw the push nut 104 outward to separate the lower wedge block from the hole wall. Then, remove the bolt from the wall hole as a whole, completing the removal of the bolt.
[0047] Therefore, through the structural setting of the bolts of the present application, effective and non-destructive removal of the expansion bolts is achieved, which not only makes disassembly and assembly convenient, but also improves disassembly and assembly efficiency.
[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A detachable expansion bolt, characterized in that: The detachable expansion bolt comprises: a screw rod (102), a push nut (104), a sleeve (106), a lower wedge block (107) and an upper wedge block (108); A push nut (104) is provided in the middle of the screw rod (102), the sleeve (106) is sleeved on the screw rod (102), and the sleeve (106) is fixedly connected to the push nut (104); The lower wedge block (107) is arranged on the other side of the sleeve (106) and is in contact with the sleeve (106), and a groove is provided on the lower wedge block (107), and the screw (102) is arranged in the groove body of the lower wedge block (107); The outer side of the sleeve (106) is also sleeved with a spring (105), and the two ends of the spring (105) are respectively connected to the lower wedge block (107) and the push nut (104); An upper wedge block (108) is provided on the other side of the lower wedge block (107), the wedge-shaped inclined surfaces of the upper wedge block (108) and the lower wedge block (107) are matched, and the upper wedge block (108) is fixedly connected to the screw rod (102).
2. The detachable expansion bolt according to claim 1, wherein: When the expansion bolts are fixed, the upper wedge block (108) and the lower wedge block (107) are located in the wall hole (109), and the push nut (104) is configured to be screwed in the direction of the upper wedge block (108).
3. The detachable expansion bolt according to claim 2, wherein: When the expansion bolt is removed, the push nut (104) is configured to be screwed in a direction away from the upper wedge block (108).
4. The detachable expansion bolt according to claim 1, wherein: A locking nut (103) is also provided in the middle of the screw rod (102). When the expansion bolt is fixed, the locking nut (103) contacts and connects with the push nut (104).
5. The detachable expansion bolt according to claim 4, characterized in that: The screw rod (102) is also provided with a nut (101), which is located on the side of the locking nut (103) away from the push nut (104).
6. The detachable expansion bolt according to claim 1, wherein: The outer surfaces of the lower wedge-shaped block (107) and the upper wedge-shaped block (108) are provided with corrugated ridge structures.
7. The detachable expansion bolt according to claim 1, wherein: The upper wedge block (108) and the screw rod (102) are connected by integral molding or welding.
8. The detachable expansion bolt according to claim 1, wherein: The two ends of the spring (105) are respectively connected by welding to the lower wedge block (107) and the push nut (104).