Thread-free embedded sleeve
Through the inverted conical spherical connection and limiting convex rib design of the threadless embedded sleeve, the problems of inclination, thread damage and looseness of the embedded sleeve in the prior art are solved, adaptive adjustment and mechanical limiting are achieved, operation and maintenance difficulties are reduced and connection reliability is ensured.
Patent Information
- Application Number
- CN202422228009.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing internal thread type embedded sleeve may be inclined during the embedding process, and there may be thread damage and thread connection loosening during later operation, which increases the difficulty of operation and maintenance and workload.
The threadless embedded sleeve is used to connect to the connector through an inverted tapered spherical surface, so that the connector can achieve adaptive adjustment of the angle within a certain range, and mechanical limiting is achieved by setting long and short limiting convex ribs in the inner cavity of the connection end to ensure smooth installation and disassembly.
The problems of thread damage and connection looseness in the prior art are solved, which reduces the difficulty of operation and maintenance and workload, while ensuring the reliability of the connection and the convenient loading and unloading process.
Smart Images
Figure CN222962904U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of urban rail transit, in particular to a threadless embedded sleeve. Background Art
[0002] With the development of urban rail transit construction technology, the requirements for the safe construction and later operation and maintenance of subway tunnels are also getting higher and higher. In order to ensure the integrity and durability of the tunnel structure itself, a new type of shield segment embedded anchoring technology with non-destructive and rapid installation has emerged. Among them, the embedded sleeve scheme is a relatively good and cost-effective embedded anchoring technology. Most of the existing embedded sleeves are internal thread sleeves, which are connected and fixed to external channels and other equipment by cooperating with screws. The internal thread type sleeve may tilt during the embedding process, and the screw cannot adaptively adjust the angle after being threadedly connected to the sleeve, which is not conducive to the installation and adjustment of subsequent external channels and other equipment. Moreover, problems such as thread damage and the inability to directly detect whether the thread connection is loose may occur during the later operation, increasing the operation and maintenance difficulty and workload. Summary of the Utility Model
[0003] The utility model provides a threadless embedded sleeve to overcome the deficiencies of the prior art.
[0004] The technical solution adopted by the utility model is as follows: a threadless embedded sleeve, the embedded sleeve includes an upper embedded end and a lower connection end, the connection end has an inner cavity, the bottom of the inner cavity is a cavity, the middle is an inverted conical spherical cavity, and the cavity and the spherical cavity are smoothly connected; the lower end surface of the connection end is provided with an insertion port with an outer diameter the same as the inner diameter of the cavity, and the insertion port penetrates through the spherical cavity and communicates with the cavity, and the spherical cavity is equally divided into several concave spherical surfaces through the insertion port; on both axial sides of each concave spherical surface, a long convex rib and a short convex rib are respectively provided, and the long convex rib and the short convex rib are arranged alternately in the circumferential direction, and the long convex rib extends to the bottom of the cavity.
[0005] The cavity is a cylindrical cavity, the insertion port is a strip-shaped hole, and both ends of the strip-shaped hole are arc surfaces with the same inner diameter as the cylindrical cavity.
[0006] The cavity is a cylindrical cavity, the insertion port is a spline hole, and the major diameter of the spline hole is the same as the inner diameter of the cylindrical cavity.
[0007] The spline hole is a three-tooth structure.
[0008] The embedded end is in a hemispherical structure with the spherical surface facing downwards, and anti-rotation convex ribs are evenly distributed on the surface of the hemispherical structure.
[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0010] 1. The utility model is connected with the connecting piece through an inverted conical spherical surface, enabling the connecting piece to achieve angle self-adaptive adjustment within a certain range, and the connection is stable and reliable. It overcomes the problems of thread damage and loose thread connection that may occur during the later operation of the prior art, reducing the operation and maintenance difficulty and workload.
[0011] 2. By arranging long and short limiting ribs in the inner cavity of the connection end and arranging them alternately, the utility model can achieve mechanical limiting of the connecting piece to ensure proper installation; at the same time, it can achieve reverse limiting during disassembly to ensure smooth disassembly, ensuring the reliability of the connection and facilitating on-site loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic structural diagram of Embodiment 1 of the utility model;
[0013] Figure 2 is a schematic cross-sectional view of the structure of Embodiment 1 of the utility model;
[0014] Figure 3 is Figure 2 the A-A cross-sectional view of
[0015] Figure 4 is a schematic structural diagram of Embodiment 2 of the utility model;
[0016] Figure 5 is a schematic structural diagram of the connecting piece used in conjunction with Embodiment 1 of the utility model;
[0017] Figure 6 is a schematic structural diagram of the connecting piece used in conjunction with Embodiment 2 of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The present utility model will be described in detail below with reference to the drawings and specific embodiments.
[0019] Embodiment 1, refer to Figure 1 、 2 、3, 5;
[0020] A threadless embedded sleeve, the threadless embedded sleeve 1 includes an upper embedded end 3 and a lower connection end 4. The connection end 4 has an inner cavity, the bottom of the inner cavity is a cavity 4-1, the middle part is an inverted conical spherical cavity 4-2, and the cavity 4-1 is smoothly connected with the spherical cavity 4-2; the lower end surface of the connection end 4 is provided with an insertion port 4-3 having an outer diameter the same as the inner diameter of the cavity 4-1, and the insertion port 4-3 penetrates through the spherical cavity 4-2 and communicates with the cavity 4-1, and the spherical cavity 4-2 is equally divided into a plurality of concave spherical surfaces through the insertion port 4-3; long ribs 4-4 and short ribs 4-5 are respectively arranged on both axial sides of each concave spherical surface, and the long ribs 4-4 and the short ribs 4-5 are arranged alternately in the circumferential direction, and the long ribs 4-5 extend to the bottom of the cavity 4-1.
[0021] The cavity 4-1 is a cylindrical cavity, the insertion port 4-3 is a strip-shaped hole, and both ends of the strip-shaped hole are arc surfaces with the same inner diameter as that of the cylindrical cavity. The spherical cavity 4-2 is equally divided into two symmetric concave spherical surfaces through the insertion port 4-3.
[0022] The embedded end 3 has a hemispherical structure with the spherical surface facing downwards, and anti-rotation ribs 3-1 are evenly distributed on the surface of the hemispherical structure. During embedding, the embedded end 3 and the connection end 4 are embedded in the shield segment, and the end face of the connection end 4 is flush with the surface of the shield segment.
[0023] One end of the connecting piece 2 used in conjunction with the first embodiment has a connecting head 2-1 adapted to the insertion port 4-3, and the other end has an external thread. The connecting head 2-1 is a strip-shaped structure, the outer peripheral surface of the upper end of the strip-shaped structure is a cylindrical surface 2-3 adapted to the inner diameter of the cylindrical cavity, and the outer peripheral surface of the lower end is a convex spherical surface 2-2 adapted to the concave spherical surface.
[0024] During use, the connecting head 2-1 of the connecting piece 2 is inserted into the bottom of the cylindrical cavity from the insertion port 4-3 and rotated counterclockwise until it is vertical after being limited by the long rib 4-4, so that the convex spherical surface 2-2 of the connecting head 2-1 fits with the concave spherical surface, and the connecting piece 2 is suspended below the connection end 4. The connecting piece 2 can achieve adaptive adjustment of the angle through spherical connection within a certain range.
[0025] See the second embodiment Figure 4 、 6 ; The basic structure is the same as that of the first embodiment, and the difference lies in that: the insertion port 4-3 is a spline hole with a three-tooth structure, and the major diameter of the spline hole is the same as the inner diameter of the cylindrical cavity. The spherical cavity 4-2 is equally divided into three evenly distributed concave spherical surfaces through the insertion port 4-3. The connecting head 2-1 is a three-tooth spline structure, and the outer peripheral surface of the upper part of the tooth end of the three-tooth spline structure is a cylindrical surface 2-3 adapted to the inner diameter of the cylindrical cavity, and the outer peripheral surface of the lower part of the tooth end is a convex spherical surface 2-2 adapted to the concave spherical surface. The spline hole and the spline structure are preferably three-tooth structures evenly distributed.
[0026] The above embodiments are only the preferred embodiments of the present invention, and are not used to limit the implementation scope of the present invention. Therefore, all equivalent changes made to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.
Claims
1. A threadless embedded sleeve, characterized in that: The embedded sleeve (1) comprises an embedded end (3) at an upper portion and a connecting end (4) at a lower portion, wherein the connecting end (4) has an inner cavity, wherein the bottom of the inner cavity is a cavity (4-1) and the middle portion is an inverted conical spherical cavity (4-2), and the cavity (4-1) is smoothly connected to the spherical cavity (4-2); an insertion port (4-3) having an outer diameter equal to the inner diameter of the cavity (4-1) is provided on the lower end surface of the connecting end (4), and the insertion port (4-3) passes through the spherical cavity (4-2) and communicates with the cavity (4-1), and the spherical cavity (4-2) is equally divided into a plurality of concave spherical surfaces through the insertion port (4-3); and a long convex rib (4-4) and a short convex rib (4-5) are respectively provided on both axial sides of each of the concave spherical surfaces, and the long convex rib (4-4) and the short convex rib (4-5) are alternately arranged along the circumferential direction, and the long convex rib (4-4) extends to the bottom of the cavity (4-1).
2. The threadless embedded sleeve according to claim 1, characterized in that: The cavity (4-1) is a cylindrical cavity, the insertion port (4-3) is a strip-shaped hole, and both ends of the strip-shaped hole are arc surfaces with the same inner diameter as the cylindrical cavity.
3. The threadless embedded sleeve according to claim 1, characterized in that: The cavity (4-1) is a cylindrical cavity, the insertion port (4-3) is a spline hole, and the major diameter of the spline hole is the same as the inner diameter of the cylindrical cavity.
4. The threadless embedded sleeve according to claim 3, characterized in that: The spline hole is a three-tooth structure.
5. The threadless embedded sleeve according to claim 1, 2 or 3, characterized in that: The embedded end (3) is in the form of a hemispherical structure with the spherical surface facing downward, and the surface of the hemispherical structure is evenly distributed with anti-rotation convex ribs (3-1).