Improved hexagonal expansion bolt

Abstract

The utility model relates to the technical field of expansion bolts, in particular to an improved hexagonal expansion bolt. According to the technical scheme, the bolt comprises a bolt body, a conical block, a sleeve and a reset frame, the bolt body is sleeved with the sleeve, a groove is formed in the sleeve, and the conical block is installed on the bolt body; a connecting hole is formed in the bolt body, a mounting block is mounted on the conical block, a screw rod is welded to the mounting block, and a mounting groove is formed in the reset frame; the bolt body is sleeved with an end cover, mounting plates are mounted at the two ends of the inner wall of the end cover through extrusion springs, and limiting frames are mounted on the inner walls of the mounting plates; the reset frame is connected to the screw in a sleeving mode through the installation groove, a limiting nut is installed on the screw through threads, and the screw is limited in the installation groove through the limiting nut. The expansion bolt can be used, the expansion position can be reset after the expansion bolt is used so that the expansion bolt can be conveniently taken down, and secondary limiting can be carried out to avoid loosening and falling.

Description

TECHNICAL FIELD

[0001] The utility model relates to expansion bolt technical field, concretely relates to a improved hexagonal expansion bolt. BACKGROUND

[0002] Expansion bolt is a special threaded connecting piece used for fixing pipeline support, suspension bracket or equipment on the wall, floor or column.

[0003] Through the retrieval, patent application no. CN210397363U discloses a kind of improved hexagonal expansion bolt, although the device when using, by the setting of end cap, expansion bolt can reduce the time of worker heavy high-altitude operation when using in high altitude, to further reduce the security risk, but the device is in wall inner wall after expansion, when needing to be taken down and replaced and maintained, personnel cooperation wrench and the like tool are pulled down to be taken down, cause to be taken down very inconvenient, and nut and bolt connection place are prone to looseness and security risk after long time use, thus still need to be improved. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides an improved hexagonal expansion bolt, which solves the problems raised in the background art.

[0005] The technical problems solved by the utility model are as follows:

[0006] An improved hexagonal expansion bolt, comprising a bolt body, a taper block, a sleeve and a reset frame, the sleeve is sleeved on the bolt body, a groove is formed in the sleeve, and the taper block is installed on the bolt body;

[0007] A connecting hole is formed in the bolt body, an installation block is installed on the taper block, a screw rod is welded on the installation block, and an installation groove is formed in the reset frame.

[0008] An end cap is sleeved on the bolt body, installation plates are installed on the inner walls of the end cap through extrusion springs, and a limiting frame is installed on the inner wall of the installation plate.

[0009] On the basis of the above technical solution, the utility model can also be improved as follows.

[0010] Further, a fastening nut is installed on the bolt body through threads, and the fastening nut is provided with a spring washer and a flat washer in cooperation with the sleeve.

[0011] The beneficial effects of the above further scheme are as follows:

[0012] The elastic pre-tightening force of the spring washer and the uniform dispersion of pressure by the flat washer significantly enhance the stability of the connection between the fastening nut and the sleeve, prolong the service life of the expansion bolt, and reduce the risk of connection failure caused by nut loosening, and is especially suitable for installation scenes with complex vibration environment.

[0013] Further, the reset frame is sleeved on the screw through the mounting groove, and a limiting nut is mounted on the screw through the thread, and the screw is limited in the mounting groove through the limiting nut.

[0014] The beneficial effects of the above further scheme are:

[0015] During the installation of the expansion bolt, the operator rotates the fastening nut to make it move forward on the bolt body. At this time, the bolt body is pulled by the fastening nut, and the taper block is moved forward in the sleeve. Due to the special shape of the taper block, it will gradually expand the sleeve during forward movement, realizing the fastening function of the expansion bolt. It is worth noting that the bolt body does not rotate, but only relies on the rotation direction of the fastening nut to realize forward and backward movement, which avoids damage to the surrounding structure caused by the rotation of the bolt body. The reset frame plays an important role in the whole process. When the expansion bolt needs to be disassembled, the taper block starts to reset under the reverse force. At this time, the reset frame can flatten the sleeve after the sleeve is expanded, and the reset frame will move backward with the taper block, so that the sleeve can return to the initial state, facilitating the subsequent smooth removal of the sleeve and the bolt body, greatly improving the installation and disassembly efficiency of the expansion bolt, and facilitating equipment maintenance and structure adjustment.

[0016] Further, the mounting plate is welded with a holding frame, the holding frame is sleeved in the end cover, and a handle is installed on the holding frame.

[0017] The beneficial effects of the above further scheme are:

[0018] The setting of the holding frame provides a convenient force point for the operator. During the installation or disassembly of the expansion bolt, the operator can hold the handle on the holding frame to more stably operate the end cover and the mounting plate and other components connected thereto, so that the operator can hold the holding frame to drive the mounting plate to expand.

[0019] Further, a limiting rod is installed on the mounting plate, and the limiting rod is slidably sleeved in the end cover.

[0020] The beneficial effects of the above further scheme are:

[0021] The limiting rod plays an important guiding and limiting role between the mounting plate and the end cover. When the end cover is installed or dismounted on the bolt body, the mounting plate is moved and expanded by the pulling of the holding frame, thereby driving the limiting frame to expand from the connecting hole of the bolt body. At this time, the limiting rod slides in the end cover, can limit the moving direction of the mounting plate, so that it can only move along the axial direction of the limiting rod, avoids the deviation or shaking of the mounting plate during the movement, and ensures the stability of the whole mounting structure.

[0022] Further, the limiting frame is slidingly sleeved in the connecting hole of the bolt body, and the inner diameter of the connecting hole is matched with the size of the limiting frame.

[0023] The beneficial effects of the above further scheme are:

[0024] The cooperation of the limiting frame and the connecting hole can further enhance the stability of the expansion bolt after installation. When the expansion bolt is installed and fastened, the end cover is sleeved on the bolt body, the limiting frame is pulled and expanded by the holding frame during sleeving, and the holding of the holding frame is released after sleeving, so that the limiting frame can enter the connecting hole by extruding the spring, and play a positioning and limiting role in the connecting hole. When subjected to external force, for example, in a vibrating environment or structure is impacted, the limiting frame can prevent the bolt body and the fastening nut from loosening and falling off, ensuring the integrity and stability of the whole expansion bolt connection structure. Since the inner diameter of the connecting hole is matched with the size of the limiting frame, the limiting frame can be closely embedded in the connecting hole, providing reliable limiting function.

[0025] Further, the four connecting holes are equidistantly and symmetrically distributed relative to the center of the bolt body.

[0026] The beneficial effects of the above further scheme are:

[0027] The four equidistantly and symmetrically distributed connecting holes can form a more uniform and stable supporting and limiting structure for the limiting frame on the bolt body. When the end cover is installed on the bolt body, the fastening nut can be limited and fixed from multiple directions through the cooperation of the four connecting holes and the limiting frame, effectively resisting external force from different directions.

[0028] The utility model provides a kind of improved hexagonal expansion bolt. With following beneficial effects:

[0029] Connection stability: the elastic pre-tightening force of spring washer and the uniform dispersion effect of flat washer on pressure between fastening nut and sleeve pipe significantly enhance the stability of connection. This not only prolongs the service life of expansion bolt, but also reduces the risk of connection failure caused by nut loosening, especially suitable for installation scenarios with complex vibration environment, ensuring the reliability of expansion bolt connection under various complex working conditions.

[0030] The close fit of the limiting frame and the connecting holes can prevent the bolt body and the fastening nut from loosening and falling off after the installation of the expansion bolt is completed. In particular, the four equidistantly and symmetrically distributed connecting holes enable the limiting frame to limit and fix the fastening nut, effectively resist external forces from different directions, and further ensure the integrity and stability of the entire expansion bolt connecting structure.

[0031] Convenient installation and disassembly: The design of the reset frame greatly improves the installation and disassembly efficiency of the expansion bolt. During installation, the bolt body does not rotate, and only relies on the rotation of the fastening nut to move forward and backward, avoiding damage to the surrounding structure. When disassembling, the reset frame can generate a reverse force when the taper block is reset, assisting the smooth movement of the taper block in the sleeve, and at the same time, the reset frame can flatten the expanded sleeve to restore its initial state, facilitating the smooth removal of the sleeve and the bolt body, and facilitating equipment maintenance and structural adjustment.

[0032] Convenient operation: The holding frame welded on the installation plate provides a convenient force point for the operator. When installing or disassembling the expansion bolt, the operator can hold the handle on the holding frame to more stably operate the end cover and the connected components, so that the operator can conveniently hold the holding frame to drive the installation plate to expand, greatly improving the convenience and controllability of the operation. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings, which are included to provide a further understanding of the present application and constitute a part of this application, illustrate certain illustrative embodiments of the present application and together with the description serve to explain the present application.

[0034] In the drawings:

[0035] Figure 1 is a front view of the present application;

[0036] Figure 2 is a front view of the present application;

[0037] Figure 3 is an enlarged schematic view of the reset frame of the present application;

[0038] Figure 4 is a cross-sectional view of the end cover of the present application.

[0039] In the drawings, the components represented by each reference numeral are listed as follows:

[0040] 1, bolt body; 101, taper block; 102, groove; 103, sleeve; 104, fastening nut; 105, connecting hole; 2, mounting block; 201, reset frame; 202, mounting groove; 203, screw; 3, end cover; 301, limiting rod; 302, holding frame; 303, limiting frame; 304, mounting plate; 305, extrusion spring. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0042] Please refer to Figures 1 to 4 The embodiments provided by the utility model:

[0043] Embodiment one: a modified hexagonal expansion bolt, comprising a bolt body 1, a taper block 101, a sleeve 103 and a reset frame 201, the sleeve 103 is sleeved on the bolt body 1, the groove 102 is formed in the sleeve 103, and the taper block 101 is installed on the bolt body 1;

[0044] The connecting hole 105 is formed in the bolt body 1, the mounting block 2 is installed on the taper block 101, and the screw 203 is welded on the mounting block 2, and the mounting groove 202 is formed in the reset frame 201;

[0045] The end cover 3 is sleeved on the bolt body 1, the mounting plate 304 is installed on the inner wall of the end cover 3 through the extrusion spring 305, and the limiting frame 303 is installed on the inner wall of the mounting plate 304;

[0046] The fastening nut 104 is installed on the bolt body 1 through threads, and the spring washer and the flat washer are arranged in cooperation with the sleeve 103, the elastic pre-tightening force of the spring washer and the uniform dispersion effect of the flat washer on pressure significantly enhance the stability of the connection between the fastening nut 104 and the sleeve 103, prolong the service life of the expansion bolt, reduce the risk of connection failure caused by nut loosening, and are especially suitable for installation scenes with complex vibration environment;

[0047] The reset frame 201 is sleeved on the screw rod 203 through the mounting groove 202, and a limiting nut is mounted on the screw rod 203 through screwing, and the screw rod 203 is limited in the mounting groove 202 through the limiting nut; during the expansion bolt mounting process, the operator rotates the fastening nut 104 to make it forwardly move on the bolt body 1 in a screwing manner. At this time, the bolt body 1 is pulled by the fastening nut 104, and then the taper block 101 is driven to move forwardly in the sleeve pipe 103. Due to the special shape of the taper block 101, the sleeve pipe 103 is gradually expanded during the forward movement of the taper block 101, and the expansion bolt fastening function is realized. It is worth noting that the bolt body 1 does not rotate, and only the rotating direction of the fastening nut 104 is used to realize the forward and backward movement, which avoids the damage to the surrounding structure caused by the rotation of the bolt body 1. The reset frame 201 plays an important role in the whole process, when the expansion bolt needs to be disassembled, the taper block 101 starts to reset under the reverse force, at this time, the reset frame 201 can flatten the sleeve pipe 103 by means of its own structure after the sleeve pipe 103 is expanded, and the reset frame 201 can drive the reset frame 201 to move reversely, so that the sleeve pipe 103 can be restored to the initial state, which facilitates the subsequent smooth taking down of the sleeve pipe 103 and the bolt body 1, greatly improves the installation and disassembly efficiency of the expansion bolt, and facilitates the equipment maintenance and structure adjustment.

[0048] In order to further limit the nut and bolt connection again, prevent loosening and falling after long-term use, for example, as shown in Figures 1 to 4 The utility model discloses a bolt body 1, taper block 101, sleeve pipe 103 and reset frame 201, the sleeve pipe 103 is sleeved on the bolt body 1, and the recess 102 is formed in the sleeve pipe 103, and the taper block 101 is installed on the bolt body 1.

[0049] The connecting hole 105 is formed in the bolt body 1, the mounting block 2 is installed on the taper block 101, the screw rod 203 is welded on the mounting block 2, and the mounting groove 202 is formed in the reset frame 201.

[0050] The end cover 3 is sleeved on the bolt body 1, the mounting plate 304 is installed on the inner wall of the end cover 3 through the extrusion spring 305, and the limiting frame 303 is installed on the inner wall of the mounting plate 304.

[0051] The holding frame 302 is welded on the mounting plate 304 and sleeved in the end cover 3, and the handle is installed on the holding frame 302. The holding frame 302 provides a convenient force point for the operator. During the installation or disassembly of the expansion bolt, the operator can hold the handle on the holding frame 302 to more stably operate the end cover 3 and the mounting plate 304 and other components connected thereto, so that the operator can hold the holding frame 302 to drive the mounting plate 304 to expand.

[0052] The limiting rod 301 is installed on the mounting plate 304 and is sleeved in the end cover 3, and the limiting rod 301 plays an important guiding and limiting role between the mounting plate 304 and the end cover 3. When the end cover 3 is installed or dismounted on the bolt body 1, the mounting plate 304 is moved and expanded by the pulling of the holding frame 302, so as to drive the limiting frame 303 to expand from the connecting hole 105 of the bolt body 1. At this time, the limiting rod 301 slides in the end cover 3, can limit the moving direction of the mounting plate 304, and can only move along the axial direction of the limiting rod 301, so as to avoid the deviation or shaking of the mounting plate 304 in the moving process, and ensure the stability of the whole mounting structure;

[0053] The limiting frame 303 is sleeved in the connecting hole 105 of the bolt body 1, and the inner diameter of the connecting hole 105 is matched with the size of the limiting frame 303. The cooperation of the limiting frame 303 and the connecting hole 105 can further enhance the stability of the expansion bolt after installation. When the expansion bolt is installed and fastened, the end cover 3 is sleeved on the bolt body 1. When sleeving, the person holding the holding frame 302 pulls and expands the limiting frame 303, and releases the holding of the holding frame 302 after sleeving, so that the limiting frame 303 can enter the connecting hole 105 by extruding the extrusion spring 305, and play a positioning and limiting role in the connecting hole 105. When subjected to external force, for example, in a vibrating environment or structure is impacted, the limiting frame 303 can prevent the bolt body 1 and the fastening nut 104 from loosening and falling off, and ensure the integrity and stability of the whole expansion bolt connecting structure. Since the inner diameter of the connecting hole 105 is matched with the size of the limiting frame 303, the limiting frame 303 can be closely embedded in the connecting hole 105, and a reliable limiting function is provided;

[0054] The connecting hole 105 is provided with four connecting holes 105, and the four connecting holes 105 are equidistantly and symmetrically distributed relative to the center of the bolt body 1. The four equidistantly and symmetrically distributed connecting holes 105 can form a more uniform and stable supporting and limiting structure of the limiting frame 303 on the bolt body 1. When the end cover 3 is installed on the bolt body 1, the four connecting holes 105 and the limiting frame 303 cooperate to limit and fix the fastening nut 104 from multiple directions, effectively resisting external force from different directions.

[0055] Working principle:

[0056] Main component cooperation: during installation, the bolt body 1 is first inserted into the hole of the object to be fixed, and the sleeve 103 is sleeved on the bolt body 1 at this time. Then, the operator rotates the fastening nut 104, and since the fastening nut 104 is connected with the bolt body 1 through threads, rotating the fastening nut 104 will make it move forward on the bolt body 1.

[0057] Taper block 101 expands sleeve 103: bolt body 1 is pulled by tightening nut 104, which in turn drives the taper block 101 installed on it to move forward in sleeve 103. Taper block 101 has a special shape, as it advances forward in sleeve 103, it will gradually expand sleeve 103. The recess 102 is provided on the sleeve 103, which makes the sleeve 103 more easily expand outward under the action of the taper block 101, so as to tightly embed the inner wall of the mounting hole, realize the expansion bolt fastening function. In this process, the bolt body 1 does not rotate, but only relies on the rotation direction of the tightening nut 104 to realize the forward and backward movement, which avoids the damage to the surrounding structure caused by the rotation of the bolt body 1.

[0058] Strengthen the stability of the connection: spring washer and flat washer are provided between tightening nut 104 and sleeve 103. The spring washer provides elastic pre-tightening force, and the flat washer uniformly disperses the pressure. The two work together to significantly enhance the stability of the connection between the tightening nut 104 and the sleeve 103, ensuring that the connection will not fail easily in a complex vibration environment.

[0059] End cap 3 installation and limit frame 303 expansion: after the expansion bolt fastening is completed, the end cap 3 is sleeved on the bolt body 1. The inner wall of the end cap 3 is provided with a mounting plate 304 at both ends through the extrusion spring 305, and the mounting plate 304 is provided with a limit frame 303. When sleeving the end cap 3, the person holding the holding frame 302 pulls and expands the limit frame 303, and the holding frame 302 is welded on the mounting plate 304 to provide a force point for the operator, which is convenient for operation. The mounting plate 304 is also provided with a limiting rod 301, which is sleeved in the end cap 3. In the process of pulling the mounting plate 304 to expand the limit frame 303, the limiting rod 301 plays a guiding role, limiting the movement direction of the mounting plate 304, and ensuring its stable movement.

[0060] Limit frame 303 positioning and limiting: after sleeving the end cap 3, the holding of the holding frame 302 is released, and the elastic force of the extrusion spring 305 makes the limit frame 303 enter the connecting hole 105 provided on the bolt body 1. The inner diameter of the connecting hole 105 is matched with the size of the limit frame 303, and after the limit frame 303 is tightly embedded in the connecting hole 105, it can prevent the bolt body 1 and the tightening nut 104 from loosening and falling off when subjected to external force, such as in a vibration environment or structure is impacted, to ensure the integrity and stability of the entire expansion bolt connection structure. The connecting hole 105 is provided with four connecting holes, which are equidistantly distributed relative to the center of the bolt body 1, so that the limit frame 303 limits and fixes the tightening nut 104, effectively resisting external force from different directions.

[0061] The cone block 101 resets and assists: when the expansion bolt needs to be disassembled, the reverse force is applied to the bolt body 1, and the cone block 101 starts to reset under the reverse force. The reset frame 201 is sleeved on the screw rod 203 through the installation slot 202, and the screw rod 203 is installed on the installation block 2 on the cone block 101. During the resetting process of the cone block 101, the reset frame 201 will perform a flattening operation on the sleeve 103, so that the sleeve 103 after distraction can return to the initial state, facilitating the subsequent removal of the sleeve 103 and the bolt body 1 from the installation hole. The screw rod 203 is limited in the installation slot 202 by the limiting nut, ensuring the stability and reliability of the reset frame 201 during the working process, avoiding the inconvenience of pulling down by hand.

[0062] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and for those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be considered as limiting the claims involved.

[0063] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. Improved hexagonal expansion bolt, comprising bolt body (1), taper block (101), sleeve (103) and reset frame (201), the sleeve (103) is sleeved on the bolt body (1), the recess (102) is formed on the sleeve (103), the taper block (101) is installed on the bolt body (1), characterized by: The connecting hole (105) is formed on the bolt body (1), the mounting block (2) is installed on the taper block (101), and the screw rod (203) is welded on the mounting block (2), and the installation groove (202) is formed in the reset frame (201); The end cover (3) is sleeved on the bolt body (1), the inner wall of the end cover (3) is provided with the mounting plate (304) through the extrusion spring (305) at both ends, and the inner wall of the mounting plate (304) is provided with the limiting frame (303).

2. The modified hexagon expansion bolt according to claim 1, characterized in that: The fastening nut (104) is installed on the bolt body (1) through threads, and the spring washer and the flat washer are arranged on the fastening nut (104) and the sleeve (103).

3. The modified hexagon head expansion bolt according to claim 1, wherein: The reset frame (201) is sleeved on the screw rod (203) through the installation groove (202), and the limiting nut is installed on the screw rod (203) through threads, and the screw rod (203) is limited in the installation groove (202) through the limiting nut.

4. The modified hexagon head expansion bolt according to claim 1, wherein: The mounting plate (304) is welded with the holding frame (302), the holding frame (302) is sleeved in the end cover (3), and the handle is installed on the holding frame (302).

5. The modified hexagon head expansion bolt according to claim 4, wherein: The limiting rod (301) is installed on the mounting plate (304), and the limiting rod (301) is sleeved in the end cover (3).

6. The modified hexagon head expansion bolt of claim 1 wherein: The limiting frame (303) is sleeved in the connecting hole (105) of the bolt body (1), and the inner diameter of the connecting hole (105) is matched with the size of the limiting frame (303).

7. The modified hexagon head expansion bolt of claim 1 wherein: The connecting hole (105) is provided with four connecting holes (105), and the four connecting holes (105) are equidistantly distributed relative to the center of the bolt body (1).

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