Embedded nut component
By designing pre-embedded nut components, the problems of unstable connection and space occupation of expansion bolts in prefabricated buildings are solved, achieving a connection effect with high stability and precision.
Patent Information
- Application Number
- CN202520174536.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-26
AI Technical Summary
Existing expansion bolts cannot meet the accuracy and stability requirements of connections in prefabricated assembled buildings, and they also occupy installation space in scenarios with limited space.
The device uses a pre-embedded nut component, which includes a rod and a nut head. The rod has a protrusion on the outside and an internal thread in the nut head. The protrusion generates a large frictional force. Nut heads can be installed at both ends of the rod, making it suitable for different shapes and scenarios. Combined with the mounting head and limiting washer, it ensures a stable connection and saves space.
It achieves highly stable connections in prefabricated buildings, avoids exposed bolts occupying space, and improves installation accuracy and safety.
Smart Images

Figure CN223648281U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building component technology, and in particular to a pre-embedded nut component. Background Technology
[0002] In existing technologies, common wall fixing bolts are mostly expansion bolts. Their installation process requires pre-drilling holes, hammering the expansion bolt into the wall to create pressure on the hole wall, and finally securing it with a nut. This connection method may not be stable enough under significant forces and torques. In prefabricated modular buildings, the connections between prefabricated wall panels, prefabricated floor slabs, and other components need to withstand even greater forces and torques, and require higher precision and stability. Expansion bolts may not meet these requirements, leading to weak connections or safety hazards.
[0003] In addition, in some scenarios with high space requirements, such as dry-hanging processes, when expansion bolts are used and nuts are installed, the bolts often protrude, occupying a certain amount of installation space, thus making them unsuitable. Utility Model Content
[0004] To address the issues of insufficient connection precision, stability, and installation space requirements of existing expansion bolts in prefabricated buildings, this invention provides a pre-embedded nut component that can withstand torque and has high load-bearing capacity while saving installation space.
[0005] An embedded nut component includes a rod body and a nut head at the end of the rod body. The rod body has a protrusion on its outer side, and the nut head has an internal thread at its end.
[0006] Furthermore, nut heads are provided at both ends of the rod.
[0007] Furthermore, the protrusions are protruding teeth evenly distributed around the outer wall of the rod.
[0008] Furthermore, the protrusion is a limiting side plate on the outer wall of the rod.
[0009] Furthermore, the nut head is frustoconical, polygonal, circular, or elliptical.
[0010] Furthermore, it also includes an installation head, the outer side of which has an external thread that matches the nut head, and a limiting washer on the outer side of the installation head.
[0011] Furthermore, it also includes an installation head, the outer side of which has an external thread that matches the nut head, and an integrated washer on the outer side of the installation head.
[0012] Furthermore, the outer end of the mounting head is provided with a polygonal countersunk hole.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. The toothed structure can generate a large frictional force inside the structure, making the installation more secure and safer.
[0015] 2. When used with bolts that match the depth of the nut head's internal thread, the bolts are minimized, avoiding the occupation of installation space and making it highly versatile. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of one structure of the pre-embedded nut component of this utility model;
[0017] Figure 2 This is a schematic diagram of two other structures of the pre-embedded nut component of this utility model;
[0018] Figure 3 These are schematic diagrams of three structures of the pre-embedded nut component of this utility model;
[0019] Figure 4 This is a schematic diagram of one structure of the mounting head of this utility model;
[0020] Figure 5 This is a schematic diagram of a structure for the pre-embedded nut component and the mounting head of this utility model.
[0021] Figure 6 This is a schematic diagram showing one usage state of the pre-embedded nut component of this utility model;
[0022] Figure 7 These are schematic diagrams of four different structures of the pre-embedded nut component of this utility model;
[0023] In the diagram: 1. Rod body; 2. Nut head; 3. Raised tooth; 4. Limiting side plate; 5. Mounting head; 6. Limiting washer; 7. Multi-angle countersunk hole; 8. Prefabricated wall. Detailed Implementation
[0024] The following detailed description of a pre-embedded nut component of this utility model is provided in conjunction with specific embodiments.
[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a pre-embedded nut component includes a rod body 1 and a nut head 2 at the end of the rod body 1. The rod body 1 is provided with an anti-disengagement component, which is a protrusion on the outer side of the rod body 1. The nut head 2 is provided with an internal thread at its end.
[0026] like Figure 6As shown, this device is used as an embedded part, pre-embedded into walls, prefabricated components, and other structures according to design requirements. When installing items or connecting structures, bolts are used to fix the structure to be connected onto the nut head 2. During pre-embedding, the nut head 2 can be completely embedded except for the bolt hole, or it can be left exposed, depending on design requirements. The protrusion can be firmly locked inside the structure, thus withstanding greater torque and load-bearing capacity, preventing detachment or loosening.
[0027] In some scenarios where this component needs to be used through walls, nut heads can be installed at both ends of the rod.
[0028] The rod can be round, square, trapezoidal, or other irregular shapes. The middle of the rod 1 has a through hole that communicates with the screw holes inside the nut heads 2 at both ends to facilitate scenarios such as threading wires or passing through water.
[0029] like Figure 7 As shown, the nut head 2 can be integrated with the rod body 1.
[0030] When used with a bolt that matches the depth of the internal thread of the nut head 2, the bolt thread can be fully inserted into the nut head 2. In some scenarios, such as dry-hanging operations for curtain walls and insulation boards, the exposed part of the installation bolt is small, which avoids occupying installation space and helps to improve installation accuracy.
[0031] like Figure 1 , Figure 2 As shown, the protrusions are protruding teeth 3 evenly distributed around the outer wall of the rod 1. The protruding teeth 3 structure can generate a large frictional force inside the structure, making the installation more secure.
[0032] like Figure 3 As shown, the protrusion is the limiting side plate 4 on the outer wall of the rod 1, which can also bear a large torque and load.
[0033] like Figure 1 As shown, when the structure is concrete, the nut head 2 is frustoconical, which effectively distributes stress over a wider area, thereby reducing the risk of concrete damage at the connection point. Additionally, construction workers can more easily observe and determine the position and orientation of the nut head 2, ensuring the accuracy and reliability of the connection. In other embodiments, such as... Figure 2 As shown, the nut head 2 is square, but in other embodiments it can also be round or elliptical, etc.
[0034] like Figure 4 , Figure 5As shown, it also includes a mounting head 5, which has an external thread on its outer side that matches the nut head 2, and a limiting washer 6 on its outer side. The mounting head 5 is used as a transition adapter to suit some scenarios that require external bolt installation. The position of the limiting washer 6 matches the depth of the internal thread of the nut head 2, serving as a reminder to the installer that the installation is in place.
[0035] The outer end of the mounting head 5 is provided with a multi-angle countersunk hole 7 so that the construction personnel can screw the mounting head 5 onto the nut head 2.
Claims
1. A pre-embedded nut component, comprising a rod (1) and a nut head (2) at the end of the rod (1), characterized in that, The rod body (1) has a protrusion on the outside and the nut head (2) has an internal thread at the end.
2. The pre-embedded nut component as described in claim 1, characterized in that, The protrusions are protruding teeth (3) evenly distributed around the outer wall of the rod (1).
3. The pre-embedded nut component as described in claim 1, characterized in that, The protrusion is the limiting side plate (4) on the outer wall of the rod (1).
4. The pre-embedded nut component as described in any one of claims 1 to 3, characterized in that, Nut heads (2) are provided at both ends of the rod (1).
5. The pre-embedded nut component as described in any one of claims 1 to 3, characterized in that, The nut head (2) is frustum-shaped, polygonal, circular, or elliptical.
6. The pre-embedded nut component as described in claim 4, characterized in that, The nut head (2) is frustum-shaped, polygonal, circular, or elliptical.
7. The pre-embedded nut component as described in claim 1, 2, 3 or 6, characterized in that, It also includes an installation head (5), which has an external thread on the outside that matches the nut head (2), and a limiting washer (6) on the outside of the installation head (5).
8. The pre-embedded nut component as described in claim 4, characterized in that, It also includes an installation head (5), which has an external thread on the outside that matches the nut head (2), and a limiting washer (6) on the outside of the installation head (5).
9. The pre-embedded nut component as described in claim 5, characterized in that, It also includes an installation head (5), which has an external thread on the outside that matches the nut head (2), and a limiting washer (6) on the outside of the installation head (5).
10. The pre-embedded nut component as described in claim 4, characterized in that, The rod (1) has a through hole in the middle that communicates with the screw hole inside the nut head (2).