Self-locking check bolt connecting assembly

Abstract

The utility model discloses a self-locking check bolt connecting assembly, and belongs to the technical field of bolts. Comprising a bolt and a bolt sleeve, the bolt sleeve sleeves the bolt, the bolt comprises a screw, threads are arranged on the outer wall of one end of the screw, a tightening head is mounted at the other end of the screw, a limiting part is mounted at the end, close to the tightening head, of the screw, the bolt sleeve comprises a locking part, and the locking part is used for being sleeved with the limiting part and clamped and limited with the limiting part. The end, away from the tightening head, of the locking part is connected with an extrusion part, the end, away from the locking part, of the extrusion part is provided with a threaded sleeve, the threaded sleeve is connected with the screw in a meshed mode, and when the screw is rotated, under mutual extrusion of the threaded sleeve and the locking part, the extrusion part is extruded to expand outwards to form limiting fixation. The limiting part and the locking part abut against each other, the threaded end of the threaded rod is matched with the threaded sleeve to be meshed with each other, when external force is applied to the threaded rod to enable the threaded rod to rotate, the extrusion part is extruded, the stable fixing effect is achieved, and looseness is effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolts, and in particular relates to a self-locking anti-loosening bolt connection component. Background Art

[0002] Expansion bolts are special threaded connectors used to fix pipe supports / hangers / brackets or equipment on walls, floors, and columns. Expansion bolts are mainly available in two types on the market: split type and semi-connected type. They both connect the bolt to the front end of the expansion sleeve to expand the middle part of the sleeve, thereby achieving a firm connection with a fixed surface such as a wall. After installation, the existing expansion bolts are difficult to disassemble once they are fixed because the bolts are tightly combined with the expansion sleeve, which poses a considerable challenge to future maintenance or modifications. Secondly, during the tightening process, the smooth expansion sleeve is prone to "follow-up" rotation as the bolt rotates, which weakens the friction between the bolt and the wall, resulting in reduced connection stability, thereby affecting the reliability and safety of the connection. Utility Model Content

[0003] Purpose of the utility model: to provide a self-locking anti-loosening bolt connection assembly to solve the above-mentioned problems existing in the prior art.

[0004] Technical solution: A self-locking anti-loosening bolt connection assembly, comprising a bolt and a bolt sleeve, the bolt sleeve being sleeved on the bolt, the bolt comprising a screw, the outer wall of one end of the screw being provided with a thread, a tightening head being installed at the other end of the screw, a limiting portion being installed at the end of the screw close to the tightening head, the bolt sleeve comprising a locking portion, the locking portion being used to be sleeved in the limiting portion and mutually engaged and limited with the limiting portion, an extrusion portion being connected to the end of the locking portion away from the tightening head, a threaded sleeve being installed at the end of the extrusion portion away from the locking portion, the threaded sleeve being meshingly connected to the screw, and when the screw is rotated, the extrusion portion is extruded and expanded outward to form a limited fixation under the mutual extrusion of the threaded sleeve and the locking portion.

[0005] Preferably, the limiting portion includes an abutment ring, which is installed at the end of the screw rod close to the tightening head, the outer wall of the abutment ring is installed with a plurality of hemispherical protrusions, the circumferential array of the hemispherical protrusions is arranged on the outer wall of the abutment ring, and the end of the abutment ring close to the extrusion portion is installed with a plurality of thorn cones, and the circumferential array of the thorn cones is arranged at the end of the abutment ring.

[0006] Preferably, the locking portion includes an annular column, an annular groove is provided inside the annular column, the difference between the radius of the annular groove and the radius inside the annular column is equal to the radius of the hemispherical protrusion, and the end of the annular column close to the tightening head is provided with circular grooves with the same number as the hemispherical protrusions, and the circular grooves correspond one-to-one to the semicircular protrusions.

[0007] Preferably, the extrusion portion includes a first mounting ring, which is mounted on the end of the locking portion, a plurality of extrusion rods are mounted in a circumferential array on the end of the first mounting ring, gaps are reserved between the extrusion rods, a second mounting ring is mounted on the end of the extrusion rods, and the second mounting ring is connected to the threaded sleeve.

[0008] Preferably, the extrusion rod includes a rod body, grooves are opened on both sides of the center of the rod body, the grooves extend along the long edge of the rod body toward the axis of the rod body, an extrusion groove is opened in the center of the inner side of the rod body along the narrow direction of the rod body, a reinforcement rod is installed on the outer side of the rod body, and the reinforcement rod is arranged opposite to the extrusion groove.

[0009] Preferably, the rod body is made of metal material.

[0010] Beneficial effect: The utility model relates to a self-locking anti-loosening bolt connection assembly, which utilizes the mutual contact between the limiting part and the locking part, and the mutual meshing between the threaded end of the matching screw and the threaded sleeve. When an external force is applied to the screw to rotate the screw, the extrusion part is extruded, thus forming a stable fixing effect and effectively preventing loosening.

[0011] Secondly, during the installation process, the thorn cone in the limit part is inserted into the wall and other connecting parts to avoid the bolt sleeve from rotating during the installation process;

[0012] Finally, after the installation is secure, when the bolt connection assembly needs to be removed, the limiting portion and the locking portion are abutted against each other, and the threaded end of the matching screw and the threaded sleeve are engaged with each other. When an external force is applied to the screw to rotate the screw, the extrusion portion can be adjusted from the extrusion state to the expansion state, and the bolt connection assembly can be quickly removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the bolt structure of the utility model;

[0014] Figure 2 The bolt sleeve structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 3 The bolt sleeve structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 4 It is a cross-sectional view of the bolt sleeve of the utility model.

[0017] Figures 1 to 4The figures are marked as follows: 100, screw; 200, thread; 300, tightening head; 400, limiting portion; 500, locking portion; 600, extrusion portion; 700, threaded sleeve; 401, abutment ring; 402, hemispherical protrusion; 403, thorn cone; 501, annular column; 502, annular groove; 503, circular groove; 601, first mounting ring; 602, extrusion rod; 603, second mounting ring; 602a, rod body; 602b, groove; 602c, extrusion groove; 602d, reinforcement rod. DETAILED DESCRIPTION

[0018] like Figures 1 to 4 As shown, the utility model provides a technical solution: a self-locking anti-loosening bolt connection assembly, including a bolt and a bolt sleeve, the bolt sleeve is sleeved on the bolt, the bolt includes a screw 100, the outer wall of one end of the screw 100 is provided with a thread 200, the other end of the screw 100 is installed with a tightening head 300, and the end of the screw 100 close to the tightening head 300 is installed with a limiting portion 400, the bolt sleeve includes a locking portion 500, the locking portion 500 is used to be sleeved in the limiting portion 400 and mutually engaged with the limiting portion 400 for limiting position, the end of the locking portion 500 away from the tightening head 300 is connected to an extrusion portion 600, and the extrusion portion 600 is away from the locking A threaded sleeve 700 is installed at one end of the part 500, and the threaded sleeve 700 is meshed with the screw rod 100. When the screw rod 100 is rotated, under the mutual extrusion of the threaded sleeve 700 and the locking part 500, the extrusion part 600 is extruded and expanded outward to form a limited fixation, that is, a stable fixing effect is formed to effectively prevent loosening. After stable installation, when the bolt connection assembly needs to be removed, the limiting part 400 and the locking part 500 are abutted against each other, and the threaded end of the screw rod 100 is meshed with the threaded sleeve 700. When an external force is applied to the screw rod 100 to rotate the screw rod 100, the extrusion part 600 can be adjusted from the extruded state to the expanded state, and the bolt connection assembly can be quickly removed.

[0019] In a further embodiment, the limiting portion 400 includes an abutment ring 401, which is installed at the end of the screw 100 close to the tightening head 300, and a plurality of hemispherical protrusions 402 are installed on the outer wall of the abutment ring 401, and the hemispherical protrusions 402 are circumferentially arrayed on the outer wall of the abutment ring 401, and a plurality of thorn cones 403 are installed on the end of the abutment ring 401 close to the extrusion portion 600, and the thorn cones 403 are circumferentially arrayed at the end of the abutment ring 401. During installation, the thorn cones 403 are inserted into an installation body such as a wall. During the installation process, the thorn cones 403 in the limiting portion 400 are inserted into a connecting part such as a wall to avoid the bolt sleeve from rotating during the installation process.

[0020] In a further embodiment, the locking portion 500 includes an annular column 501, an annular groove 502 is provided in the annular column 501, the difference between the radius of the annular groove 502 and the inner radius of the annular column 501 is equal to the radius of the hemispherical protrusion 402, and the end of the annular column 501 close to the tightening head 300 is provided with circular grooves 503 of the same number as the hemispherical protrusion 402, and the circular grooves 503 correspond to the semicircular protrusions one by one. The limiting portion 400 is inserted into the locking portion 500, and the positional relationship between the hemispherical protrusion 402 and the circular grooves 503 is adjusted so that the hemispherical protrusion 402 and the abutment ring 401 form an abutment limit, and the limiting portion is used. The part 400 and the locking part 500 are abutted against each other, and the threaded end of the matching screw 100 is meshed with the threaded sleeve 700. When an external force is applied to the screw 100 to rotate the screw 100, the extrusion part 600 is squeezed to form a stable fixing effect, which effectively prevents loosening. After stable installation, when the bolt connection assembly needs to be removed, the limiting part 400 and the locking part 500 are abutted against each other, and the threaded end of the matching screw 100 is meshed with the threaded sleeve 700. When an external force is applied to the screw 100 to rotate the screw 100, the extrusion part 600 can be adjusted from the extruded state to the expanded state, and the bolt connection assembly can be quickly removed.

[0021] In a further embodiment, the extrusion portion 600 includes a first mounting ring 601, which is mounted on the end of the locking portion 500, and a plurality of extrusion rods 602 are mounted in a circumferential array at the end of the first mounting ring 601, with gaps reserved between the extrusion rods 602, and the extrusion rods 602 include a rod body 602a, and the rod body 602a is made of metal material, and grooves 602b are provided on both sides of the center of the rod body 602a, and the grooves 602b extend along the long edge of the rod body 602a toward the axis of the rod body 602a, and an extrusion groove 602c is provided in the center of the inner side of the rod body 602a along the narrow direction of the rod body 602a, and a reinforcement rod 602d is installed on the outer side of the rod body 602a, and the reinforcement rod 602d is arranged opposite to the extrusion groove 602c. A second mounting ring 603 is installed at the end of the extrusion rod 602, and the second mounting ring 603 is connected to the threaded sleeve 700. With the cooperation of the groove 602b and the extrusion groove 602c, the central position of the extrusion rod 602 is easier to bend, so that the extrusion rod 602 is in an outwardly expanded state, forming a stable limit.

[0022] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A self-locking anti-loosening bolt connection assembly, characterized in that: The invention comprises a bolt and a bolt sleeve, wherein the bolt sleeve is sleeved on the bolt, the bolt comprises a screw rod (100), the outer wall of one end of the screw rod (100) is provided with a thread (200), the other end of the screw rod (100) is installed with a tightening head (300), the end of the screw rod (100) close to the tightening head (300) is installed with a limiting portion (400), and the bolt sleeve comprises a locking portion (500), the locking portion (500) is used to be sleeved in the limiting portion (400) and to be in contact with the limiting portion (400) are mutually engaged and limited, one end of the locking portion (500) away from the tightening head (300) is connected to an extrusion portion (600), and one end of the extrusion portion (600) away from the locking portion (500) is installed with a threaded sleeve (700), and the threaded sleeve (700) is meshedly connected with the screw rod (100). When the screw rod (100) rotates, under the mutual extrusion of the threaded sleeve (700) and the locking portion (500), the extrusion portion (600) is extruded and expanded outwards to form a limited fixation.

2. A self-locking anti-loosening bolt connection assembly according to claim 1, characterized in that: The limiting portion (400) comprises an abutment ring (401), the abutment ring (401) being mounted on the end of the screw rod (100) close to the tightening head (300), a plurality of hemispherical protrusions (402) being mounted on the outer wall of the abutment ring (401), the hemispherical protrusions (402) being arranged in a circumferential array on the outer wall of the abutment ring (401).

3. A self-locking anti-loosening bolt connection assembly according to claim 2, characterized in that: The locking portion (500) comprises an annular column (501), an annular groove (502) is provided in the annular column (501), the difference between the radius of the annular groove (502) and the inner radius of the annular column (501) is equal to the radius of the hemispherical protrusion (402), the end of the annular column (501) close to the tightening head (300) is provided with circular grooves (503) having the same number as the hemispherical protrusions (402), the circular grooves (503) corresponding to the hemispherical protrusions (402) one by one, and a plurality of spike cones (403) are installed at the end of the annular column (501) close to the extrusion portion (600), and the spike cones (403) are arranged in a circumferential array at the end of the annular column (501).

4. A self-locking anti-loosening bolt connection assembly according to claim 1, characterized in that: The extrusion portion (600) comprises a first mounting ring (601), the first mounting ring (601) being mounted on the end of the locking portion (500), a plurality of extrusion rods (602) being mounted in a circumferential array on the end of the first mounting ring (601), gaps being reserved between the extrusion rods (602), a second mounting ring (603) being mounted on the end of the extrusion rods (602), the second mounting ring (603) being connected to the threaded sleeve (700).

5. A self-locking anti-loosening bolt connection assembly according to claim 4, characterized in that: The extrusion rod (602) comprises a rod body (602a), grooves (602b) are provided on both sides of the center of the rod body (602a), the grooves (602b) extend along the long edge of the rod body (602a) in the axial direction of the rod body (602a), an extrusion groove (602c) is provided in the center of the inner side of the rod body (602a) along the narrow side of the rod body (602a), and a reinforcement rod (602d) is installed on the outer side of the rod body (602a), and the reinforcement rod (602d) is arranged opposite to the extrusion groove (602c).

6. A self-locking anti-loosening bolt connection assembly according to claim 5, characterized in that: The rod body (602a) is made of metal material.

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