Expansion part applied to hollow wall
By designing an expansion piece for hollow walls, using a combined structure of rod-shaped parts and expansion tubes, the problem of difficulty in tightening traditional expansion pieces on hollow walls is solved, high-stability tightening effect is achieved, and subsequent disassembly and reuse are supported.
Patent Information
- Application Number
- CN202421448106.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In hollow walls or light steel keel partitions, traditional expansion bolts or expansion screws are difficult to achieve effective tightening because the thin walls or sheets of the solid part of the wall are insufficient in thickness.
An expansion member including a rod-shaped member and an expansion tube is designed. The rod-shaped member has a limiting boss and an external threaded section. One end of the expansion tube has a light hole nut and an internal threaded hole. The expansion tube is driven to expand outward by rotating the rod-shaped member, and tightening is achieved by clamping the expansion section in the wall hole wall position.
Effective tightening on hollow walls is achieved, the stability of tightening is improved, and reusable by resetting the expansion section during disassembly.
Smart Images
Figure CN222633592U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building fasteners, in particular to an expansion piece applied to a hollow wall. Background Art
[0002] Usually when hanging ornaments, clothes and other daily necessities on a solid wall, holes are drilled in the solid wall and the hooks are fixed with expansion bolts or expansion screws. This method uses the friction between the expansion bolts and the wall to achieve fastening.
[0003] However, in the related art, on the wall surface of a hollow wall or a light steel frame partition wall, it is difficult to fix with traditional expansion bolts or expansion screws because the thickness of the thin wall or thin plate of the solid part of the wall is not enough. Utility Model Content
[0004] The utility model provides an expansion piece applied to a hollow wall, which is used to solve the defect in the prior art that the hollow wall is difficult to be effectively fastened by the expansion piece.
[0005] The utility model provides an expansion piece applied to a hollow wall, comprising: a rod-shaped piece and an expansion tube; the rod-shaped piece comprises a limiting boss and a rod body portion, the limiting boss is integrally formed with the rod body portion, and the limiting boss protrudes from the outer wall of the rod body portion, and at least a portion of the rod body portion has an external threaded section; one end of the expansion tube has a smooth hole nut, the smooth hole nut is integrally formed with the expansion tube, and the other end of the expansion tube has an end head portion, the end head portion is integrally formed with the expansion tube, and the end head portion is provided with an internal threaded hole along the axial direction of the expansion tube; the rod body portion is penetrated into the expansion tube, the limiting boss is matched and abutted with the end face of the smooth hole nut, and the external threaded section is matched with the internal threaded hole, so that when tightening, the expansion tube can be expanded outward by rotating the rod body portion to drive the end head portion to move.
[0006] According to the expansion piece applied to the hollow wall provided by the utility model, there is a connecting section between the smooth hole nut and the expansion tube, the connecting section is a rigid tubular structure, and the connecting section and the expansion tube are integrally formed.
[0007] According to the expansion piece applied to the hollow wall provided by the utility model, the length L of the connecting section is smaller than the thickness of the thin wall on one side of the hollow wall.
[0008] According to the expansion piece applied to the hollow wall provided by the utility model, a plurality of holes and grooves are arranged at intervals along the circumference of the tube body of the expansion tube, and the holes and grooves extend from the connecting section to the end section.
[0009] According to the expansion piece applied to hollow walls provided by the utility model, the inner diameter of the connecting section is consistent with the inner diameter d1 of the smooth hole nut, and the inner diameter d1 of the smooth hole nut is smaller than the inner diameter d2 of the expansion tube, and the inner diameter d1 of the smooth hole nut is greater than or equal to the inner diameter d3 of the end portion.
[0010] According to the expansion piece applied to the hollow wall provided by the utility model, the outer diameter of the rod body is smaller than the inner diameter d1 of the smooth hole nut, and the outer diameter of the limiting boss is larger than the inner diameter d1 of the smooth hole nut.
[0011] According to the expansion piece applied to a hollow wall provided by the utility model, the rod-shaped piece is a hook screw.
[0012] According to the expansion piece applied to a hollow wall provided by the utility model, the rod-shaped piece is a screw.
[0013] According to the expansion piece applied to the hollow wall provided by the utility model, the smooth hole nut has a circumferential limiting structure.
[0014] According to the expansion piece applied to the hollow wall provided by the utility model, the expansion tube is a metal tube.
[0015] The utility model provides an expansion piece for use in a hollow wall, which is arranged through a rod-shaped piece and an expansion tube so that the expansion tube can be driven to move under the rotation of the rod-shaped piece. The expansion tube is subjected to axial extrusion during the movement, thereby achieving outward expansion. The outward expanded portion can be stuck at the hole wall position of the wall hole to achieve overall fastening, thereby achieving the purpose of fastening the hollow wall through the expansion piece and improving the stability of the fastening.
[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 It is a structural schematic diagram of the expansion piece provided by the utility model being assembled to a hollow wall.
[0019] Figure 2 This is one of the structural schematic diagrams of the expansion sleeve in the expansion piece provided by the utility model.
[0020] Figure 3 It is a structural schematic diagram of a rod-shaped member in an expansion member provided by the utility model.
[0021] Figure 4 It is a structural schematic diagram of the expansion piece provided by the utility model in a tightened state.
[0022] Figure 5 This is the second structural schematic diagram of the expansion sleeve in the expansion piece provided by the utility model.
[0023] Figure 6 The utility model provides Figure 5 Schematic diagram of a partial cross-section along the AA axis.
[0024] Reference numerals:
[0025] 1. Rod-shaped member; 11. Rod body; 12. Position-limiting boss; 2. Expansion tube; 21. Smooth hole nut; 22. Expansion body; 221. Expansion section; 222. Hole groove; 23. End section; 24. Connecting section; 3. Thin wall on one side of the hollow wall. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0028] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0031] In the related art, in a hollow wall, such as a typical light steel keel partition wall, this type of wall is mainly composed of keel panels (one or two layers on each side of the keel), and the wall is hollow or filled with materials such as rock wool and glass wool. The thickness of the thin wall or thin plate of the solid part of the wall itself is not thick, and the conventional expansion screw or expansion piece uses the expansion part to increase the friction with the solid part of the wall to achieve fastening. Since the thin wall or thin plate of the solid part of the wall itself is relatively thin, it is difficult to achieve fastening using conventional expansion screws.
[0032] Regarding the problems in related technologies, such as Figure 1-Figure 3As shown, the present embodiment provides an expansion member applied to a hollow wall, comprising a rod-shaped member 1 and an expansion tube 2; the rod-shaped member 1 comprises a limiting boss 12 and a rod body portion 11, the limiting boss 12 is integrally formed with the rod body portion 11, and the limiting boss 12 protrudes from the outer wall of the rod body portion 11, and at least a portion of the rod body portion 11 has an external threaded section; one end of the expansion tube 2 has a smooth hole nut 21, the smooth hole nut 21 is integrally formed with the expansion tube 2, and the other end of the expansion tube 2 has an end head 23, the end head 23 is integrally formed with the expansion tube 2, and the end head 23 is provided with an internal threaded hole along the axial direction of the expansion tube 2; the rod body portion 11 is penetrated into the expansion tube 2, the limiting boss 12 is matched and abutted with the end face of the smooth hole nut 21, and the external threaded section is matched with the internal threaded hole, so that when tightening, the end head 23 is driven to move axially by rotating the rod body portion 11 to realize the outward expansion of the expansion section 221 of the expansion tube 2. The interior of the hollow wall is hollow or filled with materials such as rock wool and glass wool, which makes it difficult to achieve effective tightening with conventional expansion screws. In this embodiment, a threaded connection is achieved through the threaded section on the rod-shaped member 1 and the threaded hole on the expansion tube 2, so that when the rod-shaped member 1 is rotated, the end portion 23 of the expansion tube 2 can move axially along the rod body 11, thereby achieving expansion of the expansion section 22, and the expanded part of the expansion section 22 can be stuck in the hole wall position to achieve the tightening of the expansion member.
[0033] It can be understood that compared with traditional expansion screws that achieve fastening through the friction between the expansion part and the hole wall, in this embodiment, the expansion section 22 that expands outward is stuck in the hole wall, and the whole can be adapted and installed with the thin wall 3 on one side of the hollow wall, and can have higher fastening properties.
[0034] During the specific installation, firstly, the rod-shaped member 1 and the expansion tube 2 are inserted into the wall surface with a hole on one side of the hollow wall, and then the smooth hole nut 21 is clamped with an appropriate tool. After the smooth hole nut 21 is clamped, the rod-shaped member 1 is rotated to move the end portion 23 of the expansion tube 2, and the end portion 23 moves toward the smooth hole nut 21, so that the expansion tube 2 can be squeezed to make the expansion section 22 expand outward, and the part of the expansion section 22 that expands outward can be stuck in the hole wall position, so as to achieve fastening. In addition, the scheme in this embodiment is also conducive to subsequent disassembly. During disassembly, by rotating the rod-shaped member 1 in the opposite direction, the end portion 23 moves toward the end away from the smooth hole nut 21, so that the expansion section 22 can be contracted and reset, which is convenient for disassembly after the expansion section 22 is reset, so as to achieve reuse.
[0035] Specifically, the hollow wall in this embodiment is a light steel frame partition wall. When the expansion piece is installed, it is installed on the thin wall 3 on one side of the wall (light steel frame partition wall). For the specific installation process, please refer to the above description.
[0036] According to an embodiment provided by the utility model, there is a connecting section 24 between the smooth hole nut 21 and the expansion tube 2. The connecting section 24 is a rigid tubular structure, and the connecting section 24 is integrally formed with the expansion tube 2. The setting of the connecting section 24 can facilitate the installation of the expansion piece and facilitate the subsequent disassembly.
[0037] It can be understood that the wall of the hollow wall (i.e., the thin plate on one side of the keel of the light steel keel partition wall) has a certain thickness. After the expansion piece is inserted into the hole on the wall, it is fastened by the clamping of the expansion tube 2. The connecting section 24 of this embodiment is located exactly at the hole wall position of the wall, which makes it easy to take out during installation and disassembly.
[0038] In a specific implementation, the length L of the connecting section 24 is smaller than the thickness σ of the thin wall 3 on one side of the hollow wall. Specifically, the length L of the connecting section 24 is slightly smaller than the thickness σ of the thin plate constituting the hollow wall.
[0039] In a specific application, if the length of the connecting section 24 exceeds the thickness of the hollow wall, the expansion section 22 of the expansion tube 2 needs to be deformed to a greater extent. In this embodiment, by limiting the length of the connecting section 24 to be less than the thickness of the thin wall 3 on one side of the hollow wall, the expansion part can be fastened under limited deformation, and is convenient for disassembly and installation.
[0040] In a specific application, the hollow wall is composed of a keel and thin plates (as thin walls) connected to both sides of the keel. When the expansion piece is installed, it is fastened by passing through the thin plate forming one side of the hollow wall. The thin plate is a gypsum board, and the thickness σ of the gypsum board is 9.5-25 mm. The length L of the connecting section 24 is less than the thickness σ of the gypsum board (single layer or multi-layer).
[0041] like Figure 4 , Figure 5 As shown, in a specific application, the thickness of the thin wall 3 on one side of the hollow wall is 20 mm, the length L of the connecting section 24 is 14.4 mm, and when the expansion piece is passed through the hole on the wall, the connecting section 24 is located in the opening on the wall, which enables the expansion piece to provide a larger tightening force with a smaller deformation when in a tightened state.
[0042] In a specific example, a plurality of holes and grooves 222 are arranged at intervals along the circumference of the tube body of the expansion tube 2, and the holes and grooves 222 extend from the connecting section 24 to the end section 23, and the tube body portion between the holes and grooves 222 forms an expansion body 22. In this embodiment, the expansion body 22 that expands outward from the expansion tube 2 is clamped with the hole wall to achieve fastening, and the holes and grooves 222 are arranged in most areas of the tube body of the expansion tube 2, which makes the expansion displacement larger during expansion, and can have a larger expansion protrusion structure, thereby improving the stability of fastening. Specifically, in actual processing, the holes and grooves are obtained by milling on the tube body to form a hollow structure in the expansion section 221.
[0043] like Figure 6 As shown, in a specific example, the number of the hole grooves 222 is six, and the six hole grooves 222 divide the expansion tube 222 into six expansion parts. When tightened, the expansion parts expand outwards respectively to achieve engagement with the hole wall.
[0044] like Figure 5 As shown, according to an embodiment provided by the utility model, the inner diameter of the connecting section 24 is consistent with the inner diameter d1 of the smooth hole nut 21, and the inner diameter d1 of the smooth hole nut 21 is smaller than the inner diameter d2 of the expansion body 22, and the inner diameter d1 of the smooth hole nut 21 is greater than or equal to the inner diameter d3 of the end portion 23.
[0045] In a specific example, the connecting section 24 and the expansion tube 2 are integrally formed, and the smooth hole nut 21 and the expansion tube 2 are integrally formed, that is, both ends of the expansion tube 2 are integrally formed structures.
[0046] In a specific application, the smooth hole nut 21 has a circumferential limiting mechanism, and the circumferential limiting structure cooperates with an external tool to prevent the expansion tube 2 from rotating. Specifically, the smooth hole nut 21 includes a hexagonal nut head, and the hole in the nut head is a smooth hole structure. The hexagonal nut head can be circumferentially limited by a tool such as a wrench to prevent the expansion tube 2 from rotating.
[0047] It is understandable that the inner diameter d2 of the expansion section 221 of the expansion tube 2 is set larger than the inner diameter d1 of the smooth hole nut 21 and also larger than the inner diameter d3 of the end portion 23, which makes it easier for the expansion body 22 to deform and expand outward during tightening, facilitating the installation of the fastener.
[0048] In specific configuration, the outer diameter of the rod body 11 is smaller than the inner diameter d1 of the smooth hole nut 21, and the outer diameter of the limiting boss 12 is larger than the inner diameter d1 of the smooth hole nut 21. This facilitates assembly of the rod-shaped member 1 and improves the stability of the expansion member.
[0049] It is understandable that the limiting boss 12 is used to limit the rod 1 when it rotates, preventing the entire rod 1 from retracting into the expansion tube 2. The outer diameter of the rod body 11 is limited so that it has a clearance fit with the smooth hole nut 21, which can facilitate the rotation and assembly of the rod 1.
[0050] like Figure 1 , Figure 3 As shown, in a specific application, the rod-shaped member 1 is a hook screw. The hook screw includes a rod-shaped screw portion and a curved hook portion. The definition of the hook screw is convenient for rotation on the one hand, and heavy objects can be hung on the other hand through the hook portion. Of course, the rod-shaped member 1 can also be a screw.
[0051] In a specific embodiment, the expansion tube 2 is a metal tube. The metal tube allows the expansion section 221 to maintain the deformed posture after being squeezed and deformed, thereby improving the fastening stability of the expansion piece.
[0052] Through the description of the above embodiments, technicians in this field can clearly understand that each embodiment is arranged through the rod-shaped member 1 and the expansion tube 2, so that the expansion tube 2 can be driven to move under the rotation of the rod-shaped member 1, and the expansion body 221 is squeezed during the movement, thereby achieving outward expansion, and the outward expanded part can be stuck in the hole wall position of the wall hole to achieve overall fastening, thereby achieving the purpose of fastening the hollow wall through the expansion member and improving the stability of the fastening.
[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. An expansion member applied to a hollow wall, characterized in that: include: Rod-shaped member and expansion tube; The rod-shaped member comprises a limiting boss and a rod body portion, wherein the limiting boss and the rod body portion are integrally formed, and the limiting boss protrudes from the outer wall of the rod body portion, and at least a portion of the rod body portion has an external thread section; One end of the expansion tube has a smooth hole nut, the smooth hole nut is integrally formed with the expansion tube, and the other end of the expansion tube has a terminal head, the terminal head is integrally formed with the expansion tube, and the terminal head is provided with an internal threaded hole along the axial direction of the expansion tube; The rod body is inserted into the expansion tube, the limiting boss is in abutment with the end face of the smooth hole nut, and the external thread section is in cooperation with the internal thread hole, so that the expansion tube can be expanded outward by rotating the rod body to drive the end head to move during tightening.
2. The expansion piece for use in a hollow wall according to claim 1, characterized in that: A connecting section is provided between the smooth hole nut and the expansion tube. The connecting section is a rigid tubular structure, and the connecting section and the expansion tube are integrally formed.
3. The expansion member applied to a hollow wall according to claim 2, characterized in that: The length L of the connecting section is smaller than the thickness of the thin wall on one side of the hollow wall.
4. The expansion member applied to a hollow wall according to claim 2, characterized in that: A plurality of holes and grooves are arranged at intervals along the circumference of the expansion tube, and the holes and grooves extend from the connecting section to the end section.
5. The expansion member applied to a hollow wall according to claim 2, characterized in that: The inner diameter of the connecting section is consistent with the inner diameter d1 of the smooth hole nut, and the inner diameter d1 of the smooth hole nut is smaller than the inner diameter d2 of the expansion tube, and the inner diameter d1 of the smooth hole nut is greater than or equal to the inner diameter d3 of the end portion.
6. The expansion member applied to a hollow wall according to claim 5, characterized in that: The outer diameter of the rod body is smaller than the inner diameter d1 of the smooth hole nut, and the outer diameter of the limiting boss is larger than the inner diameter d1 of the smooth hole nut.
7. The expansion member for use in a hollow wall according to claim 1, characterized in that: The rod-shaped member is a hook screw.
8. The expansion member applied to a hollow wall according to claim 1, characterized in that: The rod-shaped member is a screw.
9. The expansion member applied to a hollow wall according to claim 1, characterized in that: The smooth hole nut has a circumferential limiting structure.
10. The expansion piece for use in a hollow wall according to any one of claims 1 to 9, characterized in that: The expansion tube is a metal tube.