Detachable expansion bolt
By designing a removable expansion bolt structure, including screws, expansion tubes, wedge countersunks and petal-type limiting sheets, the problem of difficult disassembly of traditional expansion bolts is solved, and the removability of the bolts and the reuse of fixed positions is achieved.
Patent Information
- Application Number
- CN202420651394.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-04-01
AI Technical Summary
Once installed, traditional expansion bolts are difficult to disassemble, and the screws usually need to be cut off, resulting in structural damage and fixed positions that can no longer be used.
An expansion bolt including a screw, expansion tube, wedge countersunk and petal-type limiting sheet is designed. The bolts are detachable through means such as separation of the wedge countersunk and the screw, and the limiting effect of the petal-type limiting sheet.
The detachability of the expansion bolt is achieved, damage to the cutting screw is avoided, the value of the fixed position is retained, and the convenience of use is improved.
Smart Images
Figure CN222558961U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of connecting pieces, in particular to a detachable expansion bolt. Background Art
[0002] Expansion bolts, also known as expansion screws, are a commonly used fastener, widely used in the fixation of various structural parts. Its working principle mainly relies on the friction between the bolt and the hole wall to achieve the fixation of the object.
[0003] However, once traditional expansion bolts are installed, if problems arise and they need to be removed, they are often difficult to remove from the wall because the expansion bolts expand during the installation process and tightly bond to the hole wall, making removal difficult. The commonly used solution is to cut off the screw directly, but this not only destroys the structural integrity of the expansion bolt, but also makes the fixed position unable to be used again. Utility Model Content
[0004] In order to solve the problem that the existing expansion bolts cannot be taken out from the wall once they encounter problems, the screw rod can only be cut off, so that the position cannot be used again, causing many inconveniences, the utility model provides a detachable expansion bolt.
[0005] The technical solution adopted by the utility model is as follows: the utility model provides a detachable expansion bolt, including a screw rod and an expansion tube sleeved on the screw rod, a nut detachably mounted on the screw rod, and a wedge-shaped countersunk head detachably mounted on one end of the screw rod, a screw hole is provided on one side of the interior of the wedge-shaped countersunk head, a plurality of arc-shaped protrusions are provided on the side wall of the wedge-shaped countersunk head, and a thread 2 is provided on the side wall of one end of the screw rod.
[0006] Furthermore, the second thread is threadedly connected to the screw hole.
[0007] Furthermore, a thread 1 is provided on the side wall of the other end of the screw rod, and a planar protrusion is provided at the other end of the screw rod.
[0008] Furthermore, a petal-shaped limiting piece is provided at one end of the expansion tube, and a plurality of expansion pieces are provided at the other end of the expansion tube.
[0009] Furthermore, a spring washer is detachably mounted on the screw rod, and the nut is threadedly connected to the thread rod.
[0010] The beneficial effects achieved by the utility model using the above structure are as follows:
[0011] (1) The setting of the wedge-shaped countersunk head can be separated from the screw rod. The screw rod can be taken out of the expansion tube first. Since there is no screw rod in the expansion tube, the expanded part of the expansion tube can shrink when it is pulled out, and then the expansion tube can be completely taken out.
[0012] (2) The arc-shaped protrusion can be inserted into the crack of the expansion tube.
[0013] (3) The petal-shaped limit piece is set to facilitate the use of tools to pinch the petal-shaped limit piece and pull the expansion tube out of the wall during disassembly.
[0014] (4) The flat protrusion can be inserted into the crack of the expansion tube, making it easier for the wrench to clamp the screw and turn the wrench in reverse to rotate the screw, so that the screw and the wedge-shaped countersunk head are separated. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 This is a front view of a detachable expansion bolt of the utility model;
[0017] Figure 2 Schematic diagram of the screw structure;
[0018] Figure 3 It is the right view of the screw;
[0019] Figure 4 It is a schematic diagram of the wedge-shaped countersunk structure;
[0020] Figure 5 It is the right view of the wedge-shaped countersunk head;
[0021] Figure 6 This is the right side view of the expansion tube.
[0022] Among them, 1. screw, 2. expansion tube, 3. wedge-shaped countersunk head, 4. spring washer, 5. nut, 6. thread one, 7. thread two, 8. flat protrusion, 9. petal-shaped limit plate, 10. expansion plate, 11. screw hole, 12. arc-shaped protrusion. DETAILED DESCRIPTION
[0023] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.
[0024] like Figure 1-Figure 6As shown, the utility model proposes a detachable expansion bolt, including a screw rod 1, and an expansion tube 2 sleeved on the screw rod 1, one end of the expansion tube 2 is provided with a petal-shaped limit piece 9, the other end of the expansion tube 2 is provided with a plurality of expansion pieces 10, a nut 5 is detachably mounted on the screw rod 1, a spring gasket 4 is detachably mounted on the screw 1, and also includes a wedge-shaped countersunk head 3, the wedge-shaped countersunk head 3 is detachably mounted on one end of the screw rod 1, a screw hole 11 is opened on one side of the inner side of the wedge-shaped countersunk head 3, a plurality of arc-shaped protrusions 12 are arranged on the side wall of the wedge-shaped countersunk head 3, a thread 2 7 is arranged on the side wall of one end of the screw rod 1, the thread 2 7 is threadedly connected to the screw hole 11, a thread 1 6 is arranged on the side wall of the other end of the screw rod 1, the nut 5 is threadedly connected to the thread 1 6, and a plane protrusion 8 is arranged on the other end of the screw rod 1.
[0025] During specific use, when the expansion bolt is installed, put the expansion bolt into the hole and turn the nut 5 with a wrench. Due to the limiting effect of the petal-shaped limiting piece 9, the screw rod 1 moves to the right, and the wedge-shaped countersunk head 3 enters the expansion piece 10. The petal-shaped limiting piece 9 enters the gap between the expansion pieces 10 to complete the expansion fixation. When the bolt needs to be pulled out, first rotate the nut 5 in the opposite direction to remove the nut 5 from the screw rod 1, and use pliers to pinch the flat protrusion 8 and rotate it. Since the petal-shaped limiting piece 9 enters the gap between the expansion pieces 10, the wedge-shaped countersunk head 3 does not move, and the screw rod 1 is rotated and removed from the screw hole 11. At this time, use pliers to pinch the petal-shaped limiting piece 9, pull the expansion tube 2 out of the wall, and finally use tweezers to take the wedge-shaped countersunk head 3 out of the hole. The above is the overall working process of the utility model. Repeat this step next time you use it.
[0026] It can be seen from the above embodiments that the beneficial effects of the utility model are:
[0027] The setting of the wedge-shaped countersunk head can realize separation from the screw rod, and the screw rod can be taken out of the expansion tube first. Since there is no screw rod in the expansion tube, the expanded part of the expansion tube can shrink when pulled out, and then the expansion tube can be completely taken out; the setting of the arc-shaped convex piece can be stuck in the crack of the expansion tube; the setting of the petal-shaped limit piece makes it convenient to use tools to pinch the petal-shaped limit piece during disassembly and pull the expansion tube out of the wall; the setting of the flat convex block can be stuck in the crack of the expansion tube, making it convenient for the wrench to clamp the screw rod, and the wrench can be turned in reverse to rotate the screw rod, so that the screw rod is separated from the wedge-shaped countersunk head.
[0028] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A detachable expansion bolt, comprising a screw rod (1) and an expansion tube (2) sleeved on the screw rod (1), wherein a nut (5) is detachably mounted on the screw rod (1), characterized in that : It also includes a wedge-shaped countersunk head (3), which is detachably mounted on one end of the screw rod (1), a screw hole (11) is provided on one side of the interior of the wedge-shaped countersunk head (3), a plurality of arc-shaped protrusions (12) are provided on the side wall of the wedge-shaped countersunk head (3), and a thread (7) is provided on the side wall of one end of the screw rod (1).
2. A detachable expansion bolt according to claim 1, characterized in that: The second thread (7) and the screw hole (11) are threadedly connected.
3. A detachable expansion bolt according to claim 2, characterized in that: A thread (6) is provided on the side wall of the other end of the screw rod (1), and a plane protrusion (8) is provided on the other end of the screw rod (1).
4. The detachable expansion bolt according to claim 3, characterized in that: One end of the expansion tube (2) is provided with a petal-shaped limiting piece (9), and the other end of the expansion tube (2) is provided with a plurality of expansion pieces (10).
5. The detachable expansion bolt according to claim 4, characterized in that: A spring washer (4) is detachably mounted on the screw rod (1), and the nut (5) is threadedly connected to the thread one (6).