Sleeve type expansion bolt
By designing a sleeve-type expansion bolt with four locking pieces and a wavy gap gap, the problems of side explosion and nut slipping in the prior art are solved, and sufficient locking force and maximum expansion effect are achieved.
Patent Information
- Application Number
- CN202422332353.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-24
AI Technical Summary
When the expansion force of existing sleeve type expansion bolts is too large or the sleeve opening is too large, it is easy to cause the side of the sleeve to explode, causing the nut to slip.
A casing type expansion bolt including studs, hexagon nuts, conical nuts and sleeves is designed. The lower end of the casing is equipped with four openings that penetrate the tube wall to form a locking piece, and the upper end is equipped with a wavy gap notch, and the side of the tapered nut is equipped with anti-slip traces.
Through the expansion of the four locking pieces and the design of the wavy gap gap, sufficient locking force and maximum expansion effect are achieved, avoiding the problems of side explosion of the sleeve and the nut slipping.
Smart Images
Figure CN222963145U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of expansion bolts, in particular to a sleeve type expansion bolt. Background Art
[0002] The components of an expansion bolt include a countersunk head bolt, an expansion sleeve, a nut and a washer. When the nut is tightened, the countersunk part of the countersunk head bolt expands the expansion sleeve when it retracts, so that it is tightly pressed and fixed to the perforation of the wall or the cement floor.
[0003] At present, for the sleeve type expansion bolts sold on the market, a bolt with a tapered head is buried in the wall, and the threaded bolt head is exposed, and then the workpiece is fixed with a nut. Both the bolt head and the nut are exposed outside the cement floor or the wall. However, for the existing expansion sleeves, most of the expansion openings on the side are connected and fixed without threads or with single threads. When the expansion force is too large or the opening of the sleeve is too large, the side of the sleeve will burst, resulting in the nut slipping off.
[0004] The foregoing description is provided to give general background information and does not necessarily constitute prior art. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a sleeve type expansion bolt, which has sufficient locking force and realizes the maximum expansion effect.
[0006] The utility model provides a sleeve type expansion bolt, which includes a stud, a hexagonal nut, a tapered nut and a sleeve; one end of the stud is connected with the hexagonal nut, and an external thread is arranged on the side of the stud; the sleeve is sleeved on the stud, four openings penetrating through the pipe wall are arranged on the side wall of the lower end of the sleeve, and four locking pieces are formed at the lower end of the sleeve; a wavy gap notch is arranged on the side wall of the upper end of the sleeve, and both ends of the gap notch penetrate through the upper edge opening of the sleeve and one of the openings respectively; the inner wall of the tapered nut is provided with an internal thread matching with the external thread, and anti-slip lines are arranged on the side of the tapered nut, and the tapered nut is connected on the stud.
[0007] Further, the stud and the hexagonal nut are integrally formed and connected.
[0008] Further, the stud and the hexagonal nut are detachably connected.
[0009] Further, a through screw hole is arranged on the hexagonal nut, and the screw hole is in threaded connection with the stud.
[0010] Further, the sleeve type expansion bolt further includes a gasket, the gasket is sleeved on the stud, and the gasket is located between the hexagonal nut and the sleeve.
[0011] Furthermore, the minimum outer diameter of the conical nut is smaller than the diameter of the sleeve.
[0012] Furthermore, the angle between adjacent openings is 90 degrees.
[0013] The sleeve expansion bolt of the utility model, when in use, the stud is passed through the workpiece to be installed and placed thereon, a hole with the same diameter as the sleeve is drilled on the surface of concrete or masonry, thereby effectively reducing the swinging phenomenon in the hole, after the sleeve expansion bolt is placed in the hole, the hexagonal nut is rotated to move the conical nut forward, forcing the four locking pieces of the sleeve to expand outwards, thereby increasing the friction between the sleeve and the inner wall of the hole, and the bolt is anchored in the hole; the design of the wavy gap notch ensures that there is sufficient locking force during the expansion process of the sleeve, so that the four locking pieces at the lower end of the sleeve can open a larger angle, thereby achieving the maximum expansion effect; at the same time, the wavy gap notch is not easy to disengage, so that the conical nut is not easy to slip off. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic structural diagram of the sleeve-type expansion bolt provided in Example 1 of the utility model.
[0015] Figure 2 for Figure 1 Another structural schematic diagram of the middle sleeve type expansion bolt.
[0016] Figure 3 for Figure 1 Schematic diagram of the structure of the stud of the middle sleeve type expansion bolt.
[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the tapered nut of the middle sleeve type expansion bolt.
[0018] Figure 5 for Figure 1 Schematic diagram of the structure of the sleeve of the middle sleeve type expansion bolt.
[0019] Figure 6 This is a schematic structural diagram of the sleeve-type expansion bolt provided in Example 2 of the utility model.
[0020] The reference numerals and components involved in the drawings are as follows:
[0021] 1. Stud 11. External thread 2. Hexagonal nut
[0022] 21, screw hole 3, tapered nut 31, internal thread
[0023] 32, anti-slip pattern 4, casing 41, opening
[0024] 42. Locking piece 43. Gap notch 5. Gasket Detailed implementation manners
[0025] The following will further describe in detail the detailed implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0026] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence.
[0027] Embodiment 1
[0028] Figure 1 It is a structural schematic diagram of the sleeve expansion bolt provided by Embodiment 1 of the present utility model. Figure 2 is Figure 1 another structural schematic diagram of the sleeve expansion bolt in Figure 3 is Figure 1 a structural schematic diagram of the stud of the sleeve expansion bolt in Figure 4 is Figure 1 a structural schematic diagram of the tapered nut of the sleeve expansion bolt in Figure 5 is Figure 1 a structural schematic diagram of the sleeve of the sleeve expansion bolt in. Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The sleeve expansion bolt provided by the embodiment of the present utility model includes a stud 1, a hexagon nut 2, a tapered nut 3 and a sleeve 4; one end of the stud 1 is connected with the hexagon nut 2, and an external thread 11 is provided on the side surface of the stud 1; the sleeve 4 is sleeved on the stud 1, four openings 41 penetrating the pipe wall are provided on the side wall of the lower end of the sleeve 4, and four locking pieces 42 are formed at the lower end of the sleeve 4; a wavy gap notch 43 is provided on the side wall of the upper end of the sleeve 4, and both ends of the gap notch 43 penetrate the upper edge of the upper end of the sleeve 4 and one of the openings 41 respectively; the inner wall of the tapered nut 3 is provided with an internal thread 31 matching the external thread 11, and anti-slip threads 32 are provided on the side surface of the tapered nut 3, and the tapered nut 3 is connected to the stud 1.
[0029] When the sleeve expansion bolt of the present utility model is in use, the stud 1 is placed through the workpiece to be installed, and a hole with the same diameter as the sleeve 4 is drilled on the surface of the concrete or masonry, so as to effectively reduce the swinging phenomenon in the hole. After the sleeve expansion bolt is placed into the hole, the hexagonal nut 2 is rotated to move the tapered nut 3 forward, forcing the four locking pieces 42 of the sleeve 4 to expand outwards, increasing the friction between the sleeve 4 and the inner wall of the hole, and the bolt is then anchored tightly in the hole.
[0030] It should be noted that the design of the wavy gap notch 43 of the present utility model enables sufficient locking force during the expansion of the sleeve 4, so that the four locking pieces 42 at the lower end of the sleeve 4 can open at a larger angle, thus achieving the maximum expansion effect; at the same time, the wavy gap notch 43 is not easily disengaged, making the tapered nut 3 not easily slip off.
[0031] Furthermore, the stud 1 and the hexagonal nut 2 are integrally formed and connected; the sleeve 4 type expansion bolt further includes a gasket 5, the gasket 5 is sleeved on the stud 1, and the gasket 5 is located between the hexagonal nut 2 and the sleeve 4; the minimum outer diameter of the tapered nut 3 is smaller than the pipe diameter of the sleeve 4; the included angle between adjacent openings 41 is 90 degrees.
[0032] Embodiment 2
[0033] The sleeve expansion bolt of this embodiment is basically the same as that of Embodiment 1, the difference lies in the connection method between the stud 1 and the hexagonal nut 2.
[0034] Figure 6 It is a schematic structural diagram of the sleeve expansion bolt provided by Embodiment 2 of the present utility model. Please refer to Figure 6 , the stud 1 and the hexagonal nut 2 of this embodiment are detachably connected. Specifically, a through screw hole 21 is provided on the hexagonal nut 2, and the screw hole 21 is in threaded connection with the stud 1.
[0035] Based on the above description, the advantages of the present utility model are as follows:
[0036] For the sleeve expansion bolt of the present utility model, when in use, the stud passes through the workpiece to be installed and is placed, and a hole with the same diameter as the sleeve is drilled on the surface of the concrete or masonry, so as to effectively reduce the swinging phenomenon in the hole. After the sleeve expansion bolt is placed into the hole, the hexagonal nut is rotated to move the tapered nut forward, forcing the four locking pieces of the sleeve to expand outwards, increasing the friction between the sleeve and the inner wall of the hole, and the bolt is then anchored tightly in the hole; the design of the wavy gap notch enables sufficient locking force during the expansion of the sleeve, so that the four locking pieces at the lower end of the sleeve can open at a larger angle, thus achieving the maximum expansion effect; at the same time, the wavy gap notch is not easily disengaged, making the tapered nut not easily slip off.
[0037] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims described above.
Claims
1. A sleeve type expansion bolt, characterized in that: The invention comprises a stud (1), a hexagonal nut (2), a conical nut (3) and a sleeve (4); one end of the stud (1) is connected to the hexagonal nut (2), and an external thread (11) is provided on the side of the stud (1); the sleeve (4) is sleeved on the stud (1), and four openings (41) penetrating the tube wall are provided on the side wall of the lower end of the sleeve (4), and four locking plates (42) are formed on the lower end of the sleeve (4); A wave-shaped slit notch (43) is provided on the side wall of the upper end of the sleeve (4), and the two ends of the slit notch (43) respectively penetrate the upper end edge of the sleeve (4) and one of the openings (41); The inner wall of the conical nut (3) is provided with an internal thread (31) matching the external thread (11), and the side surface of the conical nut (3) is provided with an anti-slip pattern (32). The conical nut (3) is connected to the stud (1).
2. The sleeve type expansion bolt according to claim 1, characterized in that: The stud (1) and the hexagonal nut (2) are integrally formed and connected.
3. The sleeve type expansion bolt according to claim 1, characterized in that: The stud (1) and the hexagonal nut (2) are detachably connected.
4. The sleeve type expansion bolt according to claim 3, characterized in that: The hexagonal nut (2) is provided with a through screw hole (21), and the screw hole (21) and the stud (1) are threadedly connected.
5. The sleeve type expansion bolt according to claim 1, characterized in that: The sleeve-type expansion bolt also includes a gasket (5), which is sleeved on the stud (1) and located between the hexagonal nut (2) and the sleeve (4).
6. The sleeve type expansion bolt according to claim 1, characterized in that: The minimum outer diameter of the conical nut (3) is smaller than the diameter of the sleeve (4).
7. The sleeve type expansion bolt according to claim 1, characterized in that: The included angle between adjacent openings (41) is 90 degrees.