Tailless threaded sleeve fastening structure

Abstract

The utility model discloses a tailless thread sleeve fastening structure, and particularly relates to the field of fastening structures, the tailless thread sleeve fastening structure comprises a base body, the top of the base body is provided with an internal thread groove, the internal thread of the internal thread groove is in threaded connection with a thread sleeve body, and the internal thread of the thread sleeve body is in threaded connection with a bolt. And the cap of the bolt abuts against the vertical pressing head and drives the vertical pressing head to move downwards, meanwhile, the supporting spring is compressed, the penetrating rod is driven to move downwards, the abutting piece is driven to move outwards through the connecting rod, and the abutting piece abuts against the surface of the expansion groove. Therefore, the fastening effect of the thread sleeve body is further enhanced. When the thread sleeve body needs to be detached, the bolt is taken out firstly, the supporting spring rebounds to drive the vertical pressing head and the penetrating rod to move upwards due to the fact that abutting of the bolt is lost, and the moving rod and the abutting block are driven by the connecting rod to move inwards to be separated from the surface of the expansion groove. The fastening structure is started through installation of the bolt and withdrawn through disassembly of the bolt, and the effect that the threaded sleeve fixing assembly is convenient to assemble and disassemble is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fastening structures, in particular to a tailless stud fastening structure. Background Technique

[0002] A tailless stud, also known as a tailless wire insert, a wire thread insert, etc., is a new type of threaded fastener. It is usually made of high-strength and high-precision materials such as stainless steel, copper, aluminum, etc. Among them, stainless steel materials are widely used due to their excellent corrosion resistance and mechanical properties. The tailless stud is embedded in the threaded hole of metal or non-metal materials by means of cold extrusion to form a high-strength, high-precision and wear-resistant threaded connection. Its structure is simple, easy to use, has a strong bearing capacity, and has good self-locking and detachable properties, which can significantly improve the reliability and service life of threaded connections.

[0003] For the existing tailless stud fastening structure, it usually uses the cooperation of a tailless stud and other fastening structures to achieve the effect of preventing the bolt from loosening. However, since other fastening structures usually need to be installed separately with tools during use, the complexity of the installation and disassembly of the tailless stud is greatly increased. Therefore, the inventor of the present invention provides a tailless stud fastening structure to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to provide a tailless stud fastening structure to achieve the effect of convenient installation and disassembly of the stud fixing assembly.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A tailless stud fastening structure includes a base body. An internal thread groove is opened at the top of the base body. A stud body is threadedly connected inside the internal thread groove. A bolt is screwed inside the stud body. A fastening mechanism is arranged at the top of the stud body. An expansion groove is opened at the top of the internal thread groove. The fastening mechanism includes a connecting ring fixedly connected to the top of the stud body. A group of circumferentially arranged movable grooves are opened on the outer side of the connecting ring. A movable rod is arranged inside the movable groove. An abutting piece is fixedly connected to the outer side of the movable rod.

[0007] As a further scheme of the utility model: A guiding groove is opened on the right side of the movable rod. A guiding rod is slidably connected inside the guiding groove. The right side of the guiding rod is fixedly connected to the movable groove.

[0008] As a further solution of the present utility model: A set of moving grooves arranged in a circular pattern are formed on the top surface of the connecting ring. A vertical pressing head is slidably connected inside the moving groove. A through rod is fixedly connected to the bottom of the vertical pressing head. The through rod penetrates the moving groove and is located inside the moving groove, and the through rod is slidably connected to the penetration part of the moving groove. The bottom of the through rod is hinged to a connecting rod through a hinge member, and the left end of the connecting rod is hinged to a moving rod through a hinge member; A support spring is fixedly connected to the inner side of the moving groove, and the top of the support spring is fixedly connected to the vertical pressing head.

[0009] As a further solution of the present utility model: The cross-sectional size of the side surface of the through rod at the penetration part of the moving groove is adapted.

[0010] As a further solution of the present utility model: The outer end of the abutting piece is designed in an arc shape that fits the surface of the expansion groove.

[0011] As a further solution of the present utility model: The abutting piece is made of rubber material.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] For this tailless nut sleeve fastening structure, when installing a bolt into the inside of the nut sleeve body, the cap at the top of the bolt gradually contacts a set of vertical pressing heads. The cap of the bolt continuing to move downward abuts against the vertical pressing head and drives the vertical pressing head to move downward, simultaneously compressing the support spring, thereby driving the through rod to move downward. The moving rod and the abutting piece are driven to move outward through the connecting rod, so that the abutting piece abuts against the surface of the expansion groove. Thus, the fastening effect of the nut sleeve body is further enhanced. When the nut sleeve body needs to be disassembled, first remove the bolt. Due to the loss of the abutment of the bolt, the support spring rebounds to drive the vertical pressing head and the through rod to move upward, and the moving rod and the abutting block are driven to move inward through the connecting rod to disengage from the surface of the expansion groove. The above-mentioned fastening structure is activated by the installation of the bolt and retracted by the disassembly of the bolt, achieving the effect of convenient installation and disassembly of the nut sleeve fixing component.

[0014] In addition, for this tailless nut sleeve fastening structure, the nut sleeve body is installed into the inside of the base through a special tool, and then the bolt is screwed into the inside of the nut sleeve body. The nut sleeve body forms an elastic connection between the bolt and the base, thereby eliminating the manufacturing error of the thread and improving the connection strength. The inner wall of the nut sleeve is designed with a special thread, which can automatically penetrate into the material during the installation process to form a tight and firm connection. Thus, the effect of preventing the bolt from detaching from the base due to external impact is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a tailless nut sleeve fastening structure;

[0016] Figure 2It is a schematic cross-sectional view of the overall structure in a tailless screw sleeve fastening structure;

[0017] Figure 3 It is a schematic structural view of the fastening mechanism in a tailless screw sleeve fastening structure;

[0018] Figure 4 It is a schematic structural view of the position A in a tailless screw sleeve fastening structure.

[0019] In the figure: 10, the base body; 11, the internal thread groove; 12, the screw sleeve body; 13, the bolt; 14, the expansion groove; 20, the fastening mechanism; 201, the connecting ring; 202, the moving rod; 203, the abutting piece; 204, the guiding groove; 205, the guiding rod; 206, the movable groove; 207, the connecting rod; 208, the moving groove; 209, the supporting spring; 210, the penetrating rod; 211, the vertical button. Specific implementation mode

[0020] As Figure 1 shown, a tailless screw sleeve fastening structure includes a base body 10, an internal thread groove 11 is opened at the top of the base body 10, a screw sleeve body 12 is threadedly connected inside the internal thread groove 11, and a bolt 13 is screwed inside the screw sleeve body 12; a fastening mechanism 20 is arranged at the top of the screw sleeve body 12.

[0021] During use, the screw sleeve body 12 is installed inside the base body 10 through a special tool, and then the bolt 13 is screwed into the screw sleeve body 12. The screw sleeve body 12 forms an elastic connection between the bolt 13 and the base body 10, thereby eliminating the thread manufacturing error and improving the connection strength. The inner wall of the screw sleeve is designed with special threads, which can automatically penetrate into the material during installation to form a tight and firm connection. Thus, the effect of preventing the bolt 13 from detaching from the base body 10 due to external impact is achieved.

[0022] Refer to Figures 2 - 4 , an expansion groove 14 is opened at the top of the internal thread groove 11, the fastening mechanism 20 includes a connecting ring 201 fixedly connected to the top of the screw sleeve body 12, a set of movable grooves 206 arranged in a circular pattern are opened on the outer side of the connecting ring 201, a movable moving rod 202 is arranged inside the movable groove 206, and an abutting piece 203 is fixedly connected to the outer side of the moving rod 202.

[0023] Preferably, a guiding groove 204 is opened on the right side of the moving rod 202, a guiding rod 205 is slidably connected inside the guiding groove 204, and the right side of the guiding rod 205 is fixedly connected to the movable groove 206. When the moving rod 202 moves, the guiding groove 204 will slide along the surface of the guiding rod 205, thereby achieving the effect of guiding the moving rod 202 and the abutting piece 203 during movement.

[0024] Specifically, a group of movable grooves 208 which are also arranged in a circle are opened on the top surface of the connecting ring 201, and a vertical pressing head 211 is slidably connected inside the movable groove 208, and a through rod 210 is fixedly connected to the bottom of the vertical pressing head 211. The through rod 210 penetrates the movable groove 208 and is located inside the movable groove 206, and the through rod 210 is slidably connected to the movable groove 206 at the penetration point, and the bottom of the through rod 210 is hinged with a connecting rod 207 through a hinge, and the left end of the connecting rod 207 is hinged to the movable rod 202 through a hinge; a support spring 209 is fixedly connected to the inner side of the movable groove 206, and the top of the support spring 209 is fixedly connected to the vertical pressing head 211.

[0025] Preferably, the side surface of the through rod 210 is adapted to the cross-sectional size of the through-hole of the movable groove 206 , so as to achieve the effect of guiding the through rod 210 when it moves.

[0026] When the bolt 13 is installed inside the screw sleeve body 12, the cap on the top of the bolt 13 gradually contacts with a group of vertical pressing heads 211, and the cap of the bolt 13 that continues to move downward abuts against the vertical pressing heads 211 and drives the vertical pressing heads 211 to move downward, and compresses the support spring 209 at the same time, thereby driving the penetration rod 210 to move downward, and driving the mobile rod 202 and the abutment sheet 203 to move outward through the connecting rod 207, so that the abutment sheet 203 abuts on the surface of the expansion groove 14. Thereby further enhancing the fastening effect of the screw sleeve body 12. When the screw sleeve body 12 needs to be disassembled, the bolt 13 is first taken out, and due to the loss of the abutment of the bolt 13, the support spring 209 rebounds and drives the vertical pressing heads 211 and the penetration rod 210 to move upward, and drives the mobile rod 202 and the abutment sheet 203 to move inwardly out of the expansion groove 14 surface through the connecting rod 207, thereby taking out the screw sleeve body 12 by a tool again, and the fastening mechanism 20 can be taken out together, and no additional disassembly operation will occur.

[0027] Furthermore, the outer end of the abutment piece 203 is designed to be arc-shaped to adapt to the surface of the expansion groove 14. When the abutment piece 203 contacts the inner surface of the expansion groove 14, the abutment piece 203 can completely fit the expansion groove 14, thereby increasing the contact area between the abutment piece 203 and the expansion groove 14 and further increasing the tightness of the screw sleeve body 12.

[0028] Preferably, the abutment sheet 203 is made of rubber material and has anti-slip and elastic effects. When the abutment sheet 203 abuts against the expansion groove 14, the surface of the abutment sheet 203 will be slightly deformed. When the base body 10 is subjected to external impact, the elastic force of the abutment sheet 203 will absorb part of the external impact force, and combined with the anti-slip property, it can prevent the screw sleeve body 12 from moving inside the base body 10.

[0029] The working principle of the utility model is as follows: when the bolt 13 is installed inside the screw sleeve body 12, the cap on the top of the bolt 13 gradually contacts a group of vertical pressing heads 211, and the cap of the bolt 13 that continues to move downward abuts against the vertical pressing heads 211 and drives the vertical pressing heads 211 to move downward, and at the same time compresses the support spring 209, thereby driving the through rod 210 to move downward, and driving the moving rod 202 and the abutting piece 203 to move outward through the connecting rod 207, so that the abutting piece 203 abuts against the surface of the expansion groove 14. Thereby, the tightening effect of the screw sleeve body 12 is further enhanced. When the screw sleeve body 12 needs to be disassembled, the bolt 13 is taken out first. Due to the loss of the abutment of the bolt 13, the support spring 209 rebounds and drives the vertical pressing head 211 and the through rod 210 to move upward, and the moving rod 202 and the abutment piece 203 are driven to move inward and leave the surface of the expansion groove 14 through the connecting rod 207. Then, the screw sleeve body 12 is taken out by a tool, and the fastening mechanism 20 can be taken out together without any additional disassembly operation.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A tailless screw sleeve fastening structure, including a base body (10), an internal thread groove (11) is opened at the top of the base body (10), a screw sleeve body (12) is threadedly connected inside the internal thread groove (11), and a bolt (13) is screwed inside the screw sleeve body (12); a tightening mechanism (20) is arranged at the top of the screw sleeve body (12); it is characterized in that, An expansion groove (14) is provided at the top of the internal thread groove (11). The fastening mechanism (20) includes a connection ring (201) fixedly connected to the top of the screw sleeve body (12). A set of circumferentially arranged movable grooves (206) are provided on the outer side of the connection ring (201). A movable moving rod (202) is arranged inside the movable groove (206). An abutting piece (203) is fixedly connected to the outer side of the moving rod (202).

2. The tailless stud tightening structure according to claim 1, wherein A guiding groove (204) is provided on the right side of the moving rod (202). A guiding rod (205) is slidably connected inside the guiding groove (204). The right side of the guiding rod (205) is fixedly connected to the movable groove (206).

3. The tailless stud tightening structure according to claim 1, characterized in that, A set of moving grooves (208) which are also circumferentially arranged are provided on the top surface of the connection ring (201). A vertical button (211) is slidably connected inside the moving groove (208). A through rod (210) is fixedly connected to the bottom of the vertical button (211). The through rod (210) penetrates through the moving groove (208) and is located inside the movable groove (206), and the through rod (210) is slidably connected to the penetration part of the movable groove (206). The bottom of the through rod (210) is hinged to a connecting rod (207) through a hinge. The left end of the connecting rod (207) is hinged to the moving rod (202) through a hinge; A support spring (209) is fixedly connected to the inner side of the movable groove (206). The top of the support spring (209) is fixedly connected to the vertical button (211).

4. A tailless screw sleeve fastening structure according to claim 3, characterized in that, The cross-sectional size of the side surface of the through rod (210) at the penetration part of the movable groove (206) is adapted to each other.

5. A tailless screw sleeve fastening structure according to claim 1, characterized in that, The outer end of the abutting piece (203) is designed in an arc shape adapted to the surface of the expansion groove (14).

6. The tailless screw sleeve fastening structure according to claim 1, characterized in that, The abutting piece (203) is made of rubber material.

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