Plug-in type anti-loose reinforcing fastener

Abstract

The utility model discloses a plug-in type anti-loose reinforcing fastener which comprises a connecting screw rod and a positioning sleeve, one end of the positioning sleeve is movably sleeved at one end of the connecting screw rod, the positioning sleeve and one end of the connecting screw rod are respectively provided with a rotary positioning structure, and a cleaning connecting structure is installed in the positioning sleeve. The rotary positioning structure comprises a positioning cavity, a mounting groove, a connecting block and a connecting rod. The utility model relates to the technical field of fasteners, through a rotation positioning structure composed of a hexagonal positioning cavity, a connecting rod and a connecting block, accurate torque transmission and circumferential limiting between a connecting screw rod and a positioning sleeve are achieved, nut looseness caused by vibration or load change is effectively avoided, the connection stability is remarkably improved, and the service life of the nut is prolonged. The connecting rigidity and durability are kept, a rubber pad in the cleaning connecting structure is matched with a cleaning hole, a sealing barrier is formed in the fastening process, and foreign matter is prevented from permeating into a threaded part.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener technical field, concretely is a kind of plug-in type anti-loose reinforcing fastener. BACKGROUND

[0002] In the field of mechanical connection, as one of the most basic fasteners, the anti-loose performance of nut is directly related to the safety and stability of equipment operation; Especially in harsh working conditions such as vibration, impact or alternating load, the traditional ordinary nut is easy to loosen or even fall off due to the micro relative movement between thread pairs, which may lead to connection failure and cause serious safety accidents;

[0003] At present, there are various anti-loose nuts on the market, such as nylon nut clamped by nylon ring, double nut structure with pre-tightening force, or eccentric nut using wedge principle; These technologies improve the anti-loose effect to some extent, but also have some inherent defects; For example, the anti-loose performance of nylon nut will decay with temperature change and nylon material aging; Double nut structure increases installation space and weight, and has high requirements for pre-tightening torque; Some special anti-loose structures are often complex in processing and high in cost;

[0004] In addition, in open, dusty or humid environment, the thread part of bolt shank is easy to accumulate dust, oil stains or produce rust; If these impurities are brought into the nut during tightening, not only the thread will be damaged, but also the fastening degree of connection will be affected, and the anti-loose effect will be significantly reduced; In view of this, for the above problems, there may be technical means to solve in the prior art, but the present case wants to provide an alternative or replacement technical scheme. INVENTION CONTENTS

[0005] To achieve the above purpose, the utility model realizes through the following technical schemes:

[0006] A plug-in type anti-loose reinforcing fastener, comprising a connecting screw and a positioning sleeve, one end of the positioning sleeve is movably sleeved on one end of the connecting screw, the other end of the positioning sleeve is provided with a rotating positioning structure, and a cleaning connection structure is installed in the positioning sleeve;

[0007] The rotating positioning structure comprises a positioning cavity, a mounting groove, a connecting block and a connecting rod;

[0008] The positioning cavity is arranged at the center of the other end of the connecting screw, the mounting groove is arranged at the center of one end of the positioning sleeve, the connecting block is movably embedded in the mounting groove, one end of the connecting rod is fixedly connected with one end of the connecting block, and the other end is movably embedded in the positioning cavity.

[0009] Preferably, the cleaning connection structure comprises a rubber pad, a cleaning hole and an internal thread sleeve;

[0010] The rubber pad is fixedly embedded in one end of the positioning sleeve, and the cleaning hole is arranged at the center of the rubber pad.

[0011] Preferably, the positioning cavity is a hexagonal cavity.

[0012] Preferably, the connecting rod is a hexagonal connecting rod.

[0013] Preferably, the mounting groove and the connecting block are polygonal.

[0014] Preferably, one end of the connecting screw is movably embedded in the cleaning hole and the internally threaded sleeve.

[0015] Beneficial effects

[0016] The utility model provides a kind of plug-in type anti-loose reinforcing fastener, with the following beneficial effects:

[0017] The rotating positioning structure formed by the hexagonal positioning cavity, connecting rod and connecting block is provided, which realizes accurate torque transmission and circumferential limiting between the connecting screw and the positioning sleeve, effectively avoids nut loosening caused by vibration or load change, significantly improves connection stability, maintains the rigidity and durability of the connection;The rubber pad in the cleaning connection structure cooperates with the cleaning hole, forming a sealed barrier during tightening to prevent foreign matter from penetrating into the threaded part;And residual impurities on the outside of the connecting screw can be quickly removed through the cleaning hole during installation, reducing thread wear and corrosion and prolonging service life;The rubber pad is made of nitrile rubber (NBR) with a hardness of Shore A 70±5, good oil resistance, aging resistance, suitable for a temperature range of-30℃ to +100℃, and suitable for most industrial environments;The tolerance fit H8 / f7 and H7 / k6 are suitable for M6-M20 size fasteners, and the typical example is M12 screw, and the fit size can be executed according to national standard GB / T 1800.1;The positioning sleeve can be fixed to the plate by pre-buried, welded or threaded connection, suitable for metal or composite plate with a thickness of ≥3mm, and still maintains stable function in vibration, high temperature or corrosion environment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view of the plug-in type anti-loose reinforcing fastener.

[0019] Figure 2 It is an expanded perspective view of the plug-in type anti-loose reinforcing fastener.

[0020] Figure 3The utility model discloses a partial section structure schematic diagram of plug-in type anti-loose reinforcing fastener.

[0021] Figure 4 The utility model discloses a positioning sleeve section structure schematic diagram of plug-in type anti-loose reinforcing fastener.

[0022] In the drawing: 1, connecting screw rod, 2, positioning sleeve, 3, positioning cavity, 4, installation slot, 5, connecting block, 6, connecting rod, 7, rubber pad, 8, cleaning hole, 9, internal thread sleeve. Specific implementation

[0023] Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0024] Embodiment: please refer to Figures 1-4 A kind of plug-in type anti-loose reinforcing fastener, including connecting screw rod 1 and positioning sleeve 2, positioning sleeve 2 one end movably fits in the one end of connecting screw rod 1, positioning sleeve 2 other end is provided with rotating positioning structure, and positioning sleeve 2 is equipped with cleaning connection structure;

[0025] Rotating positioning structure includes: positioning cavity 3, installation slot 4, connecting block 5 and connecting rod 6;

[0026] Positioning cavity 3 is provided in the center of the other end of connecting screw rod 1, installation slot 4 is provided in the center of the one end of positioning sleeve 2, connecting block 5 movably embeds in installation slot 4, connecting rod 6 one end is fixedly connected with the one end of connecting block 5, and other end movably embeds in positioning cavity 3, connecting block 5 and installation slot 4 use polygonal cooperation, realize circumferential limit, and the cooperation tolerance is H7 / g6, ensure that there is no relative rotation under vibration environment.

[0027] When assembling the plate, the staff first embeds the one end of the positioning sleeve 2 into the plate on one side, then the one end of the connecting screw rod 1 penetrates the plate on the other side and is embedded into the positioning sleeve 2, the connecting screw rod 1 and the positioning sleeve 2 are connected through the cleaning connection structure, then the staff continuously twists the connecting screw rod 1 or the positioning sleeve 2, changes the overall length of the connecting screw rod 1 and the positioning sleeve 2, until the two plates are tightly attached to the batten or each other, then the staff embeds the connecting rod 6 at the one end of the positioning sleeve 2, and makes the connecting rod 6 embedded into the positioning cavity 3 at the one end of the connecting screw rod 1, until the connecting block 5 is completely embedded into the installation slot 4, the connecting block 5 is rotationally limited by the polygonal installation slot 4, and the connecting screw rod 1 and the positioning sleeve 2 are relatively fixed by the connecting rod 6 and the positioning cavity 3, to avoid accidental rotation of the connecting screw rod 1, and ensure the fixing effect of the plate.

[0028] In the implementation process, the cleaning connection structure includes: rubber pad 7, cleaning hole 8 and internal thread sleeve 9;

[0029] The rubber pad 7 is fixedly embedded in one end of the positioning sleeve 2 by interference fit, the cleaning hole 8 is arranged at the center of the rubber pad 7, the inner diameter of the cleaning hole 8 and the outer diameter of the connecting screw 1 adopt H8 / f7 clearance fit, which can effectively remove dust, oil stains and slight rust on the surface of the connecting screw 1, and will not cause difficult screwing or excessive wear of the rubber pad; the inner wall of the cleaning hole 8 is provided with an annular groove structure, which can enhance the elastic deformation ability of the rubber and further improve the cleaning effect; the internal thread sleeve 9 is fixedly embedded in the other end of the positioning sleeve 2; an annular groove is arranged between the rubber pad 7 and the inner wall of the positioning sleeve 2 for accommodating the scraped impurities to avoid secondary pollution.

[0030] The rubber pad 7 is made of nitrile rubber (NBR), and the hardness thereof is Shore A 70±5, which has good wear resistance, oil resistance and elasticity, and is suitable for industrial environment; the inner diameter of the cleaning hole 8 and the outer diameter of the connecting screw 1 adopt clearance fit, and the fit tolerance is H8 / f7, that is, the inner diameter of the cleaning hole 8 is the basic size of the outer diameter of the connecting screw 1 plus the clearance of +0.018mm to +0.027mm, which can effectively remove dust, oil stains and slight rust on the surface of the connecting screw 1, and will not cause difficult screwing or excessive wear of the rubber pad; the inner wall of the cleaning hole 8 is provided with an annular groove structure, which can enhance the elastic deformation ability of the rubber and further improve the cleaning effect; the internal thread sleeve 9 is fixedly embedded in the other end of the positioning sleeve 2.

[0031] When the connecting screw 1 is embedded in the positioning sleeve 2, first, the cleaning hole 8 at the center of the rubber pad 7 is penetrated, the inner wall of the rubber pad 7 is in contact with the outer wall of the connecting screw 1 to clean the impurities on the outer wall of the connecting screw 1, then the internal thread sleeve 9 is matched with the external thread of the connecting screw 1, so that the connecting operation of the connecting screw 1 and the positioning sleeve 2 is realized, and the rubber pad 7 is in close contact with the outer wall of the connecting screw 1, so that a sealing barrier is formed during the fastening process to prevent foreign matters from penetrating into the threaded part and ensure the service life of the whole.

[0032] The connecting rod 6 of the positioning structure and the positioning cavity 3 adopt transition fit, and the tolerance grade is H7 / k6, which ensures that there is no gap to transmit torque in the vibration environment, avoids abnormal sound and local impact; the installation groove 4 and the connecting block 5 adopt polygonal design, and the fit tolerance is H7 / g6, which realizes accurate circumferential limiting; the structure does not depend on pre-tightening force, can keep shape stable under fatigue load, and reduces fretting wear through reasonable material selection and surface treatment.

[0033] In the implementation process, the positioning cavity 3 is a hexagonal cavity, the connecting rod 6 is a hexagonal connecting rod 6, and the installation groove 4 and the connecting block 5 are polygons.

[0034] Through embedding the connecting block 5 into the installation slot 4, the connecting block 5 is rotationally limited, meanwhile the connecting rod 6 is embedded into the positioning cavity 3, so as to rotationally limit the positioning sleeve 2 and the connecting screw 1.

[0035] In the specific implementation process, the connecting screw 1 is movably embedded into the cleaning hole 8 and the inner threaded sleeve 9.

[0036] The connecting screw 1 is scraped and cleaned through the cleaning hole 8, and the connecting screw 1 is fixed through the inner threaded sleeve 9.

[0037] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A plug-in type anti-loosening fastener, comprising a connecting screw (1) and a positioning sleeve (2), characterized in that, One end of the positioning sleeve (2) is movably fitted onto one end of the connecting screw (1), and the other end of the positioning sleeve (2) is provided with a rotation positioning structure. A cleaning connection structure is installed inside the positioning sleeve (2). The rotation positioning structure includes: a positioning cavity (3), a mounting groove (4), a connecting block (5), and a connecting rod (6); The positioning cavity (3) is located at the center of one end of the connecting screw (1), the mounting groove (4) is located at the center of the other end of the positioning sleeve (2), the connecting block (5) is movably embedded in the mounting groove (4), one end of the connecting rod (6) is fixedly connected to one end of the connecting block (5), and the other end is movably embedded in the positioning cavity (3).

2. The plug-in type anti-loosening fastener according to claim 1, characterized in that, The cleaning connection structure includes: a rubber pad (7), a cleaning hole (8), and an internally threaded sleeve (9); The rubber pad (7) is fixedly embedded in one end of the positioning sleeve (2), the cleaning hole (8) is opened at the center of the rubber pad (7), and the internal thread sleeve (9) is fixedly embedded in the other end of the positioning sleeve (2).

3. The plug-in type anti-loosening fastener according to claim 1, characterized in that, The positioning cavity (3) is a hexagonal cavity.

4. The plug-in anti-loosening fastener according to claim 1, characterized in that, The connecting rod (6) is a hexagonal connecting rod.

5. The plug-in anti-loosening fastener according to claim 1, characterized in that, Both the mounting slot (4) and the connecting block (5) are polygonal.

6. A plug-in type anti-loosening fastener according to claim 2, characterized in that, One end of the connecting screw (1) is movably fitted into the cleaning hole (8) and the internal threaded sleeve (9).

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