Fatigue-resistant torsional shear type fastener

Abstract

The utility model discloses an anti-fatigue torsional shear type fastener which comprises a screw body and a nut in threaded connection with the surface of the screw body, an extrudable limiting block is arranged on the surface of the screw body and located at the bottom of the nut, and a rotating block is in threaded connection with the surface of the screw body and located below the limiting block. The screw further comprises an annular block, the annular block is arranged on the surface of the screw body and located between the limiting block and the rotating block, connecting blocks are installed on the left side and the right side of the bottom of the annular block, rotating blocks are installed on the sides, close to the rotating block, of the connecting blocks, and annular grooves matched with the two rotating blocks are formed in the surface of the rotating block. Through mutual cooperation of the limiting blocks, the rotating blocks, the annular blocks, the connecting blocks, the rotating blocks, the annular grooves, the fixing rods, the buffer springs and the check blocks, the phenomenon that due to the fact that the anti-fatigue effect of the screw is poor, the nut rotates and loosens is avoided, and the stability when the nut and the screw are connected is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fatigue-resistant torsion-shear type fastener. Background Art

[0002] Fasteners are a type of mechanical parts that are widely used, mainly used for fastening connections. Torsion shear fasteners are a type of fastener, usually consisting of bolts, nuts and washers.

[0003] According to the application number: CN202022505012.3, a high-strength fastener for an automobile refrigeration system includes a nut, the top of the nut is fixedly connected to a screw, the surface of the screw is threadedly connected to a nut, the nut, nut and screw include a first substrate layer, a second substrate layer and a surface protective layer, the outer side of the first substrate layer is fixedly connected to the second substrate layer, the outer side of the second substrate layer is fixedly connected to the surface protective layer, the surface protective layer includes an anti-rust layer, an anti-corrosion layer and a wear-resistant layer, and the outer side of the anti-rust layer is fixedly connected to the anti-corrosion layer.

[0004] The fatigue resistance of the fasteners in the above case is not ideal, which causes the fasteners to rotate easily and become loose when used for a long time, further affecting the service life of the fasteners. For this reason, we provide a fatigue-resistant torsion shear fastener. Utility Model Content

[0005] The utility model aims to provide a fatigue-resistant torsion-shear type fastener to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a fatigue-resistant torsion-shear type fastener, comprising a screw body, and a nut threadedly connected to the surface of the screw body, an extrudable limit block is provided on the surface of the screw body and at the bottom of the nut, and a rotating block is threadedly connected to the surface of the screw body and below the limit block.

[0007] Preferably, it further comprises an annular block, which is arranged on the surface of the screw body and located between the limiting block and the rotating block, and connecting blocks are installed on both the left and right sides of the bottom of the annular block.

[0008] Preferably, a rotating block is installed on the side of the connecting block close to the rotating block, and an annular groove matching the two rotating blocks is opened on the surface of the rotating block. The side of the rotating block close to the annular groove penetrates the annular groove and extends to the inside of the annular groove to rotate in contact with the inner wall of the annular groove.

[0009] Preferably, two fixing rods are installed at the bottom of the limit block, the bottom ends of the fixing rods pass through the annular block and extend to the outside thereof, the surfaces of the fixing rods are sleeved with buffer springs, and the bottom ends of the fixing rods are installed with stoppers.

[0010] Preferably, a gasket is provided on the surface of the screw body and located on the top of the nut.

[0011] Preferably, the screw body consists of a base layer, a reinforcement layer, an anti-fatigue layer and an anti-rust layer, the reinforcement layer is arranged on the surface of the base layer, the anti-fatigue layer is arranged on the surface of the reinforcement layer, and the anti-rust layer is arranged on the surface of the anti-fatigue layer.

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

[0013] 1. The utility model avoids the phenomenon of self-rotation loosening of the nut due to poor fatigue resistance of the screw and ensures the stability of the connection between the nut and the screw through the mutual cooperation of the limit block, the rotating block, the annular block, the connecting block, the rotating block, the annular groove, the fixing rod, the buffer spring and the stopper.

[0014] 2. The utility model improves the strength of the screw body during use by providing a reinforcing layer, thereby extending the service life of the screw. The anti-fatigue effect of the screw body is improved by providing an anti-fatigue layer. The anti-rust effect of the surface of the screw body is improved by providing an anti-rust layer, thereby further improving the quality of the screw during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a structural cross-sectional view of the front view of the utility model;

[0017] Figure 3 It is a structural cross-sectional view of the front view of the screw body, the limit block, the annular block, the buffer spring and the stop block of the utility model;

[0018] Figure 4 It is a structural cross-sectional view of the top view of the screw body of the utility model.

[0019] In the figure: 1 screw body, 101 base layer, 102 reinforcement layer, 103 anti-fatigue layer, 104 anti-rust layer, 2 nuts, 3 limit blocks, 4 rotating blocks, 5 annular blocks, 6 connecting blocks, 7 rotating blocks, 8 annular grooves, 9 fixing rods, 10 buffer springs, 11 stop blocks, and 12 gaskets. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 A fatigue-resistant torsion-shear type fastener comprises a screw body 1, and a nut 2 threadedly connected to the surface of the screw body 1, an extrudable limit block 3 is provided on the surface of the screw body 1 and at the bottom of the nut 2, the top of the limit block 3 is in contact with the bottom of the nut 2, and a rotating block 4 is threadedly connected to the surface of the screw body 1 and below the limit block 3.

[0022] It also includes an annular block 5, which is arranged on the surface of the screw body 1 and is located between the limit block 3 and the rotating block 4. The left and right sides of the bottom of the annular block 5 are fixedly connected with connecting blocks 6. The side of the connecting block 6 close to the rotating block 4 is fixedly connected with a rotating block 7. The surface of the rotating block 4 is provided with an annular groove 8 adapted to the two rotating blocks 7. The side of the rotating block 7 close to the annular groove 8 penetrates the annular groove 8 and extends to the inside of it to rotate and contact with the inner wall of the annular groove 8. Two fixing rods 9 are fixedly connected to the bottom of the limit block 3. The bottom end of the fixing rod 9 penetrates the annular block 5 and extends to the outside. A buffer spring 10 is sleeved on the surface of the fixing rod 9. The bottom end of the fixing rod 9 is fixedly connected with a stopper 11, and the side of the stopper 11 close to the connecting block 6 is in contact with the connecting block 6.

[0023] Furthermore, as shown in the figure, the buffer spring 10 is in a compressed state at this time.

[0024] By the mutual cooperation of the limit block 3, the rotating block 4, the annular block 5, the connecting block 6, the rotating block 7, the annular groove 8, the fixing rod 9, the buffer spring 10 and the stopper 11, the phenomenon of the nut 2 loosening due to self-rotation caused by the poor fatigue resistance of the screw is avoided, thereby ensuring the stability of the connection between the nut 2 and the screw.

[0025] A washer 12 is disposed on the surface of the screw body 1 and located on the top of the nut 2 , and the bottom of the washer 12 is in contact with the top of the nut 2 .

[0026] The screw body 1 is composed of a base layer 101, a reinforcement layer 102, an anti-fatigue layer 103 and an anti-rust layer 104. The reinforcement layer 102 is arranged on the surface of the base layer 101, the anti-fatigue layer 103 is arranged on the surface of the reinforcement layer 102, and the anti-rust layer 104 is arranged on the surface of the anti-fatigue layer 103.

[0027] By providing the reinforcing layer 102, the strength of the screw body 1 during use is improved, thereby extending the service life of the screw. By providing the anti-fatigue layer 103, the anti-fatigue effect of the screw body 1 is improved. By providing the anti-rust layer 104, the anti-rust effect of the surface of the screw body 1 is improved, thereby further improving the quality of the screw during use.

[0028] When in use, the screw body 1 passes through two objects, and then the gasket 12 is sleeved on the screw body 1, and the nut 2 is threadedly connected to the screw body 1, and the two objects are fixed by the nut 2, and then the limit block 3 and the annular block 5 are sleeved on the surface of the screw body 1, so that the rotating block 4 is threadedly connected to the surface of the screw body 1, and then one hand presses the limit block 3 downward, and the limit block 3 squeezes the buffer spring 10 downward to move, and then the other hand rotates the rotating block 4, and the rotating block 4 drives the annular groove 8 to rotate and move upward, and the annular groove 8 drives the connecting block 6 and the annular block 5 to move upward through the rotating block 7, and the annular block 5 drives the limit block 3 to move upward, so that the limit block 3 and the nut 2 come into contact, and the limit block 3 can be loosened at this time, and the limit block 3 generates an upward extrusion force on the nut 2 through the restoring elastic force of the buffer spring 10, and at the same time generates a downward extrusion force on the rotating block 4, thereby ensuring the stability of the nut 2 and the rotating block 4 on the surface of the screw body 1.

[0029] In summary: the fatigue-resistant torsion-shear type fastener solves the problems raised in the above-mentioned background technology through the mutual cooperation of the limit block 3, the rotating block 4, the annular block 5, the connecting block 6, the rotating block 7, the annular groove 8, the fixing rod 9, the buffer spring 10 and the stop block 11, by setting the reinforcement layer 102, by setting the anti-fatigue layer 103, and by setting the anti-rust layer 104.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue-resistant torsion shear type fastener, characterized in that: The invention comprises a screw body (1), and a nut (2) threadedly connected to the surface of the screw body (1); an extrudable limit block (3) is provided on the surface of the screw body (1) and located at the bottom of the nut (2); and a rotating block (4) is threadedly connected to the surface of the screw body (1) and located below the limit block (3).

2. A fatigue-resistant torsion shear type fastener according to claim 1, characterized in that: It also comprises an annular block (5), which is arranged on the surface of the screw body (1) and located between the limiting block (3) and the rotating block (4), and connecting blocks (6) are installed on both the left and right sides of the bottom of the annular block (5).

3. A fatigue-resistant torsion shear type fastener according to claim 2, characterized in that: A rotating block (7) is installed on the side of the connecting block (6) close to the rotating block (4); an annular groove (8) matching the two rotating blocks (7) is provided on the surface of the rotating block (4); and a side of the rotating block (7) close to the annular groove (8) penetrates the annular groove (8) and extends to the inside thereof to rotate in contact with the inner wall of the annular groove (8).

4. A fatigue-resistant torsion shear type fastener according to claim 3, characterized in that: Two fixing rods (9) are installed at the bottom of the limit block (3), the bottom ends of the fixing rods (9) penetrate the annular block (5) and extend to the outside thereof, the surfaces of the fixing rods (9) are sleeved with buffer springs (10), and the bottom ends of the fixing rods (9) are installed with stoppers (11).

5. The fatigue-resistant torsion-shear type fastener according to claim 1, characterized in that: A gasket (12) is provided on the surface of the screw body (1) and located on the top of the nut (2).

6. The fatigue-resistant torsion-shear type fastener according to claim 1, characterized in that: The screw body (1) is composed of a base layer (101), a reinforcement layer (102), an anti-fatigue layer (103) and an anti-rust layer (104); the reinforcement layer (102) is arranged on the surface of the base layer (101), the anti-fatigue layer (103) is arranged on the surface of the reinforcement layer (102), and the anti-rust layer (104) is arranged on the surface of the anti-fatigue layer (103).

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