Novel expansion bolt
By designing a sliding movable rod and a tapered cap structure, the problem of expansion bolts being unable to be disassembled again was solved, enabling the expansion bolts to be disassembled and reused, and simplifying the disassembly process.
Patent Information
- Application Number
- CN202520272751.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing expansion bolts cannot be removed after use, requiring damage to the wall or mounting plate, which is time-consuming and labor-intensive.
A novel expansion bolt is designed, comprising a main sleeve, an expansion sleeve, a movable rod, and a tapered cap. The expansion sleeve is retracted and unfolded by sliding the movable rod, allowing for repeated use without damaging the installation structure.
It enables the expansion bolts to be detachable and reused, and the disassembly process is simple and quick without damaging the wall or mounting plate.
Smart Images
Figure CN223621960U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of expansion bolt technology, and specifically to a new type of expansion bolt. Background Technology
[0002] Expansion bolts, also known as expansion studs, are special threaded fasteners widely used in various fields such as construction, decoration, and equipment installation. They are mainly used to fix pipe supports / hangers / brackets or equipment to walls, floors, and columns. The working principle of expansion bolts is to use the tangential angle to cause expansion and generate frictional gripping force, thereby achieving a fixing effect. When the expansion bolt is inserted into the pre-drilled mounting hole and the nut is tightened, the nut will move inward along the thread, generating an axial compression force on the expansion tube. Under this compression pressure, the expansion tube will expand outward through the opening on the pipe wall, tightly pressing against the inner wall of the mounting hole, generating friction and anchoring force, and firmly fixing the expansion bolt in the hole.
[0003] After use, the opening on the expansion tube wall of existing expansion bolts will expand outwards and cannot be restored, making them unusable again. Furthermore, disassembly requires some damage to the wall or mounting plate, which is time-consuming and labor-intensive. Utility Model Content
[0004] 1. The technical problem to be solved by the utility model:
[0005] This utility model provides a novel expansion bolt to solve the technical problems existing in the background art.
[0006] 2. Technical Solution:
[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows: a novel expansion bolt, comprising a main sleeve, an expansion sleeve provided inside the main sleeve extending from its bottom to the outside, and a movable rod that slides axially inside the main sleeve, one end of the movable rod extending from the bottom of the expansion sleeve to the outside and fixedly mounted with a tapered cap, the other end of the movable rod having a threaded hole, the threaded hole being threadedly connected to a screw rod, and a hexagonal head fixedly mounted on the top of the screw rod and rotatably connected to a limiting disc provided on the top of the main sleeve;
[0008] The screw is also threadedly connected to a threaded sleeve. A circumferentially arranged connecting strip is provided on the outer side of the threaded sleeve. The connecting strip is slidably connected to a first sliding groove axially opened on the side wall of the main sleeve, and is fixedly connected to a movable sleeve fitted on the main sleeve.
[0009] Furthermore, a fixed sleeve is provided inside the main sleeve, and the inner wall of the fixed sleeve is provided with guide strips arranged in a circle and extending axially. The guide strips are slidably connected to the second slide groove opened on the side wall of the movable rod.
[0010] Furthermore, the top of the expansion sleeve abuts against the bottom of the fixed sleeve.
[0011] Furthermore, the expansion sleeve is provided with an external thread on its outer side, and the external thread is threadedly connected to the internal thread provided on the inner side of the main sleeve.
[0012] Furthermore, a cross-shaped groove is provided on the end face of the hexagonal head.
[0013] 3. Beneficial effects:
[0014] Compared with the prior art, the technical solution provided by this utility model has the following advantages: the screw drives the movable rod to slide downward in the main sleeve so that the tapered cap extends out from the bottom of the expansion sleeve. At the same time, the movable sleeve also slides under the main sleeve, so that the expanded tube wall of the expansion sleeve can be housed inside it. Thus, the device can be taken out from the mounting hole without damaging the wall or mounting plate. Therefore, the device can not only be disassembled and reused, but the disassembly process is also simple and quick. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the exploded structure of this utility model;
[0017] Figure 3 This is a cross-sectional structural diagram of the present invention.
[0018] Figure label:
[0019] 1. Main sleeve; 101. First slide groove; 2. Expansion sleeve; 3. Movable rod; 301. Threaded hole; 302. Second slide groove; 4. Tapered cap; 5. Screw; 6. Hexagonal head; 601. Cross groove; 7. Limiting plate; 8. Threaded sleeve; 9. Connecting strip; 10. Movable sleeve; 11. Fixed sleeve; 12. Guide strip; 13. External thread; 14. Internal thread. Detailed Implementation
[0020] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.
[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example
[0024] See attached document Figure 1-3 A novel expansion bolt includes a main sleeve 1, an expansion sleeve 2 disposed inside the main sleeve 1 extending from its bottom to the outside, and a movable rod 3 that slides axially inside the main sleeve 1. One end of the movable rod 3 extends from the bottom of the expansion sleeve 2 to the outside and is fixedly installed with a tapered cap 4. The other end of the movable rod 3 is provided with a threaded hole 301, and a screw 5 is threadedly connected to the threaded hole 301. A hexagonal head 6 is fixedly installed on the top of the screw 5 and is rotatably connected to a limiting plate 7 disposed on the top of the main sleeve 1.
[0025] The screw 5 is also threadedly connected to a threaded sleeve 8. A connecting strip 9 arranged in a circle is provided on the outer side of the threaded sleeve 8. The connecting strip 9 is slidably connected to the first sliding groove 101 axially opened on the side wall of the main sleeve 1, and is fixedly connected to the movable sleeve 10 sleeved on the main sleeve 1.
[0026] In this embodiment, after the device is placed into the mounting hole, the limiting plate 7 will abut against the end of the mounting hole. At this time, by turning the hexagonal head 6 with a hexagonal wrench, the screw 5 will rotate synchronously in the threaded hole 301 and the threaded sleeve 8, which will drive the movable rod 3 to slide upward in the main sleeve 1 so that the tapered cap 4 enters the expansion sleeve 2. At the same time, the movable sleeve 10 will also slide upward on the main sleeve 1 so that the opening on the tube wall of the expansion sleeve 2 is exposed to the outside. The tapered cap 4 can then expand outward and tightly press against the inner wall of the mounting hole, thus completing the installation of the device. Similarly, after the screw 5 is rotated in the opposite direction, the movable rod 3 will slide downward in the main sleeve 1 so that the tapered cap 4 extends out from the bottom of the expansion sleeve 2. At the same time, the movable sleeve 10 will also slide downward on the main sleeve 1, which will retract the expanded tube wall of the expansion sleeve 2 into its interior. Thus, the device can be removed from the mounting hole without damaging the wall or mounting plate. Therefore, the device can not only be disassembled and reused, but the disassembly process is also simple and quick.
[0027] The main sleeve 1 is provided with a fixed sleeve 11. The inner wall of the fixed sleeve 11 is provided with guide strips 12 arranged in a circle and extending axially. The guide strips 12 are slidably connected to the second slide groove 302 opened on the side wall of the movable rod 3.
[0028] In this embodiment, the sliding connection between the guide strip 12 and the second slide groove 302 enables the axial sliding of the movable rod 3 within the main sleeve 1.
[0029] The top of the expansion sleeve 2 abuts against the bottom of the fixed sleeve 11;
[0030] The expansion sleeve 2 is provided with an external thread 13 on its outer side, and the external thread 13 is threadedly connected to the internal thread 14 provided on the inner side of the main sleeve 1.
[0031] In this embodiment, the expansion sleeve 2 can be disassembled and replaced by the external thread 13 on the outside of the expansion sleeve 2 and the internal thread 14 on the inside of the main sleeve 1. When the expansion sleeve 2 is installed into the main sleeve 1, it can be limited by the fixing sleeve 11.
[0032] The hexagonal head 6 has a cross-shaped groove 601 on its end face.
[0033] In this embodiment, the hex head 6 can be rotated not only by a hex wrench, but also by a screwdriver in conjunction with the Phillips head groove 601.
[0034] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
[0035] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art.
Claims
1. A novel expansion bolt, characterized in that: Includes a main sleeve (1), an expansion sleeve (2) provided inside the main sleeve (1) extending from its bottom to the outside, and an axially sliding movable rod (3) provided inside the main sleeve (1). One end of the movable rod (3) extends from the bottom of the expansion sleeve (2) to the outside and is fixedly installed with a tapered cap (4). The other end of the movable rod (3) is provided with a threaded hole (301). The threaded hole (301) is threadedly connected to a screw rod (5). A hexagonal head (6) is fixedly installed on the top of the screw rod (5) and is rotatably connected to a limiting plate (7) provided on the top of the main sleeve (1). The screw (5) is also threadedly connected to a threaded sleeve (8). A connecting strip (9) arranged in a circle is provided on the outside of the threaded sleeve (8). The connecting strip (9) is slidably connected to the first sliding groove (101) axially opened on the side wall of the main sleeve (1) and is fixedly connected to the movable sleeve (10) sleeved on the main sleeve (1).
2. The novel expansion bolt according to claim 1, characterized in that: The main sleeve (1) is provided with a fixed sleeve (11), and the inner wall of the fixed sleeve (11) is provided with a guide strip (12) arranged in a circle and extending axially. The guide strip (12) is slidably connected to the second slide groove (302) opened on the side wall of the movable rod (3).
3. A novel expansion bolt according to claim 2, characterized in that: The top of the expansion sleeve (2) abuts against the bottom of the fixed sleeve (11).
4. A novel expansion bolt according to claim 3, characterized in that: The expansion sleeve (2) is provided with an external thread (13) on the outside, and the external thread (13) is threadedly connected to the internal thread (14) provided on the inside of the main sleeve (1).
5. A novel expansion bolt according to claim 3, characterized in that: The hexagonal head (6) has a cross groove (601) on its end face.