Anti-loosening bolt connecting system

Abstract

The invention discloses an anti-loosening bolt connecting system, and relates to the technical field of bolt connection, the anti-loosening bolt connecting system comprises a connecting main body used for connecting a mounting main body, the connecting main body comprises a connector, a connecting screw rod and a connecting nut, the mounting main body is provided with a mounting hole used for mounting the connecting main body, the connector is provided with a stop part, and the connecting screw rod is connected with the connecting nut. The connector is provided with a locking part, the mounting hole is provided with an embedding part matched with the locking part, when the connector is mounted in the mounting hole, the locking part abuts against the embedding part to limit mutual rotation between the connector and the mounting hole, the stability of the connecting position is improved, and then the anti-seismic performance of the connecting position and even the whole is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bolt connection, and in particular to an anti-loosening bolt connection system. Background Art

[0002] In recent years, with the continuous development of building industrialization, prefabricated and assembled construction mode and its technology have received extensive attention, research and application. This construction mode has the advantages of economy, applicability, time saving, beauty, energy saving and environmental protection, which is more in line with the society's demand for industrialization, informatization, mechanization, integration and intelligent industrial upgrading of the construction industry.

[0003] Bolt connection is the most common connection form in the above-mentioned prefabricated assembly construction mode. A complete bolt connection system includes bolts, connecting plates, gaskets, nuts, etc. Bolt connection has the advantages of high connection strength, high bearing capacity, disassembly, adjustability, and convenient construction. In addition, bolt connection also has good seismic performance, but this is more mainly reflected in the material strength of the bolt itself. Studies have found that under the action of cyclic loads, bolts, gaskets and nuts are prone to relative rotation. Therefore, in a long-term vibrating working environment, there is a risk of bolts loosening, which is very unfavorable to the seismic resistance of the structure.

[0004] To this end, the present invention proposes an anti-loosening bolt connection system, which can effectively suppress the relative rotation of the bolts in the prefabricated assembly, thereby improving the seismic performance of the connection parts and even the entirety. Summary of the invention

[0005] In view of the above shortcomings, the present invention provides an anti-loosening bolt connection system, which can overcome the problems existing in the background technology and effectively inhibit the relative rotation of the connection parts by improving the matching structure between the bolts and the connection parts. The specific technical solutions are as follows:

[0006] A bolt connection system to prevent loosening includes an installation body and a connection body installed on the installation body, the connection body includes a connection head, a connection screw and a connection nut connected in sequence, the installation body includes a mounting plate and a mounting hole opened on the mounting plate, the connection head is provided with a stop portion, the mounting hole is provided with an engaging portion matching the stop portion, and when the connection head is installed in the mounting hole, the stop portion abuts against the engaging portion to limit the relative rotation between the connection head and the mounting hole.

[0007] Preferably, a gasket is provided between the connecting head and the connecting nut, and the gasket is sleeved on the connecting screw, one end face of the gasket abuts against the mounting plate, and the other end face abuts against the connecting nut.

[0008] Preferably, the connecting head is installed at the end of the connecting screw, the stop portion is a tooth, the engaging portion is a tooth groove matched with the tooth, the stop portion is installed on the end surface where the connecting head is connected to the connecting screw, and the engaging portion is arranged on the bottom surface of the mounting hole, so that when the connecting head is installed in the mounting hole, the stop portion is embedded in the engaging portion to limit the mutual rotation between the connecting head and the mounting hole.

[0009] Preferably, the connecting head is a bolt head, the connecting head is cylindrical, and the bottom surface of the connecting head abuts against the plate surface of the mounting plate.

[0010] Preferably, the cross-section of the mounting hole is elliptical, the stop portion is located on both sides of the connecting head so that the stop portion and the connecting head form a structure with an elliptical cross-section, and the ellipse formed by the stop portion and the connecting head is consistent with the ellipse of the mounting hole, the engaging portion is a rough surface layer, the engaging portion is arranged on the hole wall of the mounting hole, the connecting head is inserted into the mounting hole, and the stop portion abuts against the engaging portion to inhibit relative rotation between the mounting hole and the connecting head.

[0011] Preferably, the connecting screw is provided with two sections of threads with opposite rotation directions, the connecting head is connected to the threads of any section of the connecting screw, and the connecting nut is connected to the threads of the other section of the connecting screw, the stop portion is a first rough surface, and the engaging portion is a second rough surface, the stop portion is arranged on the circumferential surface of the connecting head, and the engaging portion is arranged on the hole wall of the mounting hole, so that when the connecting head is installed in the mounting hole, the mutual rotation between the stopping portion and the engaging portion is limited by the mutual friction between the stopping portion and the engaging portion.

[0012] Preferably, the connecting head is a bolt cap, the thickness of the connecting head is less than the depth of the mounting hole, and the connecting head is installed in the mounting hole.

[0013] Preferably, the connecting screw is provided with two sections of threads with opposite rotation directions, and the connecting head includes a tightening head and a mounting block. The tightening head is connected to the threads of any section of the connecting screw in a rotation direction, and the connecting nut is connected to the threads of the other section of the connecting screw in a rotation direction, and the tightening head is rotatably mounted on the mounting block.

[0014] Preferably, the cross-section of the mounting hole is elliptical, the stop portion is located on both sides of the mounting block so that the stop portion and the mounting block form a structure with an elliptical cross-section, and the ellipse formed by the stop portion and the mounting block is consistent with the ellipse of the mounting hole, the engaging portion is a rough surface layer, the engaging portion is mounted on the hole wall of the mounting hole, the mounting block is inserted into the mounting hole, and the stop portion abuts against the engaging portion to inhibit relative rotation between the mounting hole and the connecting head.

[0015] Preferably, the tightening head is cylindrical and is located above the mounting hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides an anti-loosening bolt connection system. The connection system is provided with a stopper and an engaging portion used in cooperation with the stopper on a connection head and a mounting hole. When the connection head is installed in the mounting hole, the stopper and the engaging portion abut against each other to limit the mutual rotation between the connection head and the mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] Figure 1 This is an exploded view of Example 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the combined installation structure of Example 1 of the present invention;

[0021] Figure 3 This is an exploded view of Example 2 of the present invention;

[0022] Figure 4 This is a schematic diagram of the combined installation structure of Example 2 of the present invention;

[0023] Figure 5 This is an exploded view of Example 3 of the present invention;

[0024] Figure 6 This is a schematic diagram of the combined installation structure of Example 3 of the present invention;

[0025] Figure 7 This is an exploded view of Example 4 of the present invention;

[0026] Figure 8 This is a schematic diagram of the combined installation structure of Example 4 in the present invention.

[0027] 100-connecting body, 110-connecting head, 111-stopping portion, 112-tightening head, 113-mounting block, 120-connecting screw, 130-connecting nut, 140-gasket, 200-mounting body, 210-mounting plate, 220-mounting hole, 221-fitting portion. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example 1

[0033] like Figure 1 and Figure 2As shown, the present invention provides an anti-loosening bolt connection system, including a mounting body 200 and a connection body 100 installed on the mounting body 200, wherein the mounting body 200 is a preassembled structure, and the connection body 100 includes a connection head 110, a connection screw 120 and a connection nut 130 connected in sequence, and the connection screw 120 is used to connect two mounting bodies 200 and fix the two mounting bodies 200 together, and the mounting body 200 includes a mounting plate 210 and a mounting hole 220 provided on the mounting plate 210, but under the action of cyclic loads, the connection will rotate relative to each other, thereby causing the risk of loosening of the traditional connection bolts due to long-term vibration during the connection process, and the traditional connection method is very unfavorable to the earthquake resistance of the structure, so it is necessary to introduce a structure to prevent loosening;

[0034] Preferably, the connector 110 is provided with a stopper 111, and the mounting hole 220 is provided with an engaging portion 221 matched with the stopper 111, and when the connector 110 is installed in the mounting hole 220, the stopper 111 abuts against the engaging portion 221 to limit the relative rotation between the connector 110 and the mounting hole 220. In order to further prevent loosening, a gasket 140 may be provided between the connector 110 and the connecting nut 130, and the gasket 140 is sleeved on the connecting screw 120, and one end face of the gasket 140 abuts against the mounting plate 210, and the other end face abuts against the connecting nut 130.

[0035] In some preferred embodiments, the connecting head 110 is installed at the end of the connecting screw 120. It can be considered that the connecting head 110 and the connecting screw 120 are an integrated structure, the stop portion 111 is a tooth, and the engaging portion 221 is a tooth groove matched with the tooth. The stop portion 111 is installed on the end surface where the connecting head 110 and the connecting screw 120 are connected, and the engaging portion 221 is arranged on the bottom surface of the mounting hole 220, so that when the connecting head 110 is installed in the mounting hole 220, the stop portion 111 is embedded in the engaging portion 221 to limit the mutual rotation between the connecting head 110 and the mounting hole 220.

[0036] Specifically, the connection head 110 is a bolt head, and the connection head 110 is cylindrical, and the bottom surface of the connection head 110 abuts against the plate surface of the mounting plate 210 .

[0037] By adding teeth to the connecting head 110, the connecting body 100 can be used to lock the installation body 200 to prevent loosening between the connecting body 100 and the installation body during pre-installation, thereby improving the anti-seismic performance of the connecting part and even the whole.

[0038] Example 2

[0039] like Figure 3 and Figure 4 As shown, different from Example 1, in this preferred embodiment, the cross-section of the mounting hole 220 is elliptical, the stop portion 111 is located on both sides of the connecting head 110 so that the stop portion 111 and the connecting head 110 form a structure with an elliptical cross-section, and the ellipse formed by the stop portion 111 and the connecting head 110 is consistent with the ellipse of the mounting hole 220, and the connecting head 110 is inserted into the mounting hole 220. Since the cross-section of the connecting head 110 at this time is a non-circular structure, it cannot rotate in the mounting hole 220, further limiting the relative rotation between the connecting head 110 and the mounting hole 220, ensuring the stability and tightness of the connection structure, and enhancing the anti-seismic connection performance. At the same time, the embedding portion 221 is a rough surface layer, and the embedding portion 221 is arranged on the hole wall of the mounting hole 220. The connecting head 110 is inserted into the mounting hole 220, and the stop portion 111 abuts against the embedding portion 221 to inhibit the relative rotation between the mounting hole 220 and the connecting head 110.

[0040] Example 3

[0041] like Figure 5 and Figure 6 As shown, different from Example 1, in this preferred embodiment, the connecting screw 120 is provided with two sections of threads with opposite rotation directions. When connected and installed, the connecting screw 120 is first installed in the mounting hole 220 of the mounting body 200, and then the (gasket 140 and) connecting nut 130 are installed on the lower protruding end of the connecting screw 120, and the connecting head 110 is installed on the reserved end of the upper end of the connecting screw 120 - the connecting head 110 is connected to the threads of any rotation direction of the connecting screw 120, and the connecting nut 130 is connected to the threads of the other rotation direction of the connecting screw 120. The setting of the double helical thread can prevent loosening during vibration, and the double helical thread can suppress "untwisting", that is, stresses in different rotation directions can offset each other on the connecting screw 120. In order to further improve the stability of installation and connection, the stop portion 111 is a first rough surface, the engaging portion 221 is a second rough surface, the stop portion 111 is arranged on the circumferential surface of the connecting head 110, and the engaging portion 221 is arranged on the hole wall of the mounting hole 220, so that when the connecting head 110 is installed in the mounting hole 220, the mutual rotation between the connecting head 110 and the mounting hole 220 is limited by the mutual friction between the stop portion 111 and the engaging portion 221.

[0042] In some preferred embodiments, the connecting head 110 is a bolt cap, the thickness of the connecting head 110 is less than the depth of the mounting hole 220 , and the connecting head 110 is installed in the mounting hole 220 .

[0043] Example 4

[0044] like Figure 7 and Figure 8 As shown, different from Example 1, in this preferred embodiment, the connecting screw 120 is provided with two sections of threads with opposite rotation directions, the connecting head 110 includes a tightening head 112 and a mounting block 113, the tightening head 112 is connected to the threads of any section of the connecting screw 120, and the connecting nut 130 is connected to the threads of the other section of the connecting screw 120, and the same is true for Example 3. Among them, the tightening head 112 is cylindrical, and the tightening head 112 is located above the mounting hole 220.

[0045] In some preferred embodiments, the cross-section of the mounting hole 220 is elliptical, the stop portion 111 is located on both sides of the mounting block 113 so that the stop portion 111 and the mounting block 113 form a structure with an elliptical cross-section, and the ellipse formed by the stop portion 111 and the mounting block 113 is consistent with the ellipse of the mounting hole 220, the engaging portion 221 is a rough surface layer, the engaging portion 221 is installed on the hole wall of the mounting hole 220, the mounting block 113 is inserted into the mounting hole 220, and the stop portion 111 abuts against the engaging portion 221 to inhibit the relative rotation between the mounting hole 220 and the connecting head 110.

[0046] During implementation, the connecting screw 120 is first connected and installed in the mounting hole 220, (the gasket 140 and) the connecting nut 130 are installed on the lower protruding portion of the connecting screw 120, and the connecting head 110 is installed on the reserved end at the upper end of the connecting screw 120. First, the mounting block 113 is aligned with the mounting hole 220, and then the mounting block 113 is gradually pressed into the mounting hole 220 by rotating the tightening head 112 to complete the fit, and finally the tightening head 112 is tightened to complete the installation. The structure designed in Example 4 strengthens the connection stability of the connecting part through a double anti-loosening structure.

[0047] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An anti-loosening bolt connection system, comprising a mounting body (200) and a connecting body (100) mounted on the mounting body (200), wherein the connecting body (100) comprises a connecting head (110), a connecting screw (120) and a connecting nut (130) connected in sequence, and the mounting body (200) comprises a mounting plate (210) and a mounting hole (220) provided on the mounting plate (210), characterized in that: The connecting head (110) is provided with a stop portion (111), and the mounting hole (220) is provided with a fitting portion (221) that matches the stop portion (111). When the connecting head (110) is mounted in the mounting hole (220), the stop portion (111) and the fitting portion (221) abut against each other to limit relative rotation between the connecting head (110) and the mounting hole (220).

2. The anti-loosening bolt connection system according to claim 1, characterized in that: A gasket (140) is also provided between the connecting head (110) and the connecting nut (130). The gasket (140) is sleeved on the connecting screw (120). One end face of the gasket (140) abuts against the mounting plate (210), and the other end face abuts against the connecting nut (130).

3. The anti-loosening bolt connection system according to claim 1, characterized in that: The connecting head (110) is installed at the end of the connecting screw (120), the stopping portion (111) is a tooth, and the engaging portion (221) is a tooth groove matched with the tooth. The stopping portion (111) is installed on the end surface where the connecting head (110) and the connecting screw (120) are connected, and the engaging portion (221) is arranged on the bottom surface of the mounting hole (220), so that when the connecting head (110) is installed in the mounting hole (220), the stopping portion (111) is embedded in the engaging portion (221) to limit the mutual rotation between the connecting head (110) and the mounting hole (220).

4. The anti-loosening bolt connection system according to claim 3, characterized in that: The connecting head (110) is a bolt head, the connecting head (110) is cylindrical, and the bottom surface of the connecting head (110) abuts against the plate surface of the mounting plate (210).

5. The anti-loosening bolt connection system according to claim 3, characterized in that: The cross section of the mounting hole (220) is elliptical, the stop portion (111) is located on both sides of the connecting head (110) so that the stop portion (111) and the connecting head (110) form a structure with an elliptical cross section, and the ellipse formed by the stop portion (111) and the connecting head (110) is consistent with the ellipse of the mounting hole (220), the engaging portion (221) is a rough surface layer, the engaging portion (221) is arranged on the hole wall of the mounting hole (220), the connecting head (110) is inserted into the mounting hole (220), and the stop portion (111) abuts against the engaging portion (221) to inhibit relative rotation between the mounting hole (220) and the connecting head (110).

6. The anti-loosening bolt connection system according to claim 1, characterized in that: The connecting screw (120) is provided with two sections of threads with opposite rotation directions. The connecting head (110) is connected to the threads of any one section of the connecting screw (120) in a rotation direction. The connecting nut (130) is connected to the threads of the other section of the connecting screw (120) in a rotation direction. The stop portion (111) is a first rough surface, and the engaging portion (221) is a second rough surface. The stop portion (111) is arranged on the circumferential surface of the connecting head (110), and the engaging portion (221) is arranged on the hole wall of the mounting hole (220). When the connecting head (110) is installed in the mounting hole (220), the mutual rotation between the connecting head (110) and the mounting hole (220) is limited by mutual friction between the stop portion (111) and the engaging portion (221).

7. The anti-loosening bolt connection system according to claim 6, characterized in that: The connecting head (110) is a bolt cap, the thickness of the connecting head (110) is smaller than the depth of the mounting hole (220), and the connecting head (110) is installed in the mounting hole (220).

8. The anti-loosening bolt connection system according to claim 1, characterized in that: The connecting screw (120) is provided with two sections of threads with opposite rotation directions. The connecting head (110) includes a tightening head (112) and a mounting block (113). The tightening head (112) is connected to the threads of any section of the connecting screw (120) in a rotation direction. The connecting nut (130) is connected to the threads of the other section of the connecting screw (120) in a rotation direction. The tightening head (112) is rotatably mounted on the mounting block (113).

9. The anti-loosening bolt connection system according to claim 8, characterized in that: The cross section of the mounting hole (220) is elliptical, the stop portion (111) is located on both sides of the mounting block (113) so that the stop portion (111) and the mounting block (113) form a structure with an elliptical cross section, and the ellipse formed by the stop portion (111) and the mounting block (113) is consistent with the ellipse of the mounting hole (220), the engaging portion (221) is a rough surface layer, the engaging portion (221) is mounted on the hole wall of the mounting hole (220), the mounting block (113) is inserted into the mounting hole (220), and the stop portion (111) abuts against the engaging portion (221) to inhibit relative rotation between the mounting hole (220) and the connector (110).

10. The anti-loosening bolt connection system according to claim 8, characterized in that: The tightening head (112) is cylindrical and is located above the mounting hole (220).

Images