Bolt with non-loose nut

Abstract

The invention relates to the field of bolts, in particular to a nut-loosening-preventing bolt which comprises a screw, a nut and a nut fixing sleeve, the nut is fixedly arranged on the nut through a polygonal fixing column, and the nut, the nut fixing sleeve and an inner screw in a groove in the top end of the screw form a whole. The nut is prevented from rotating anticlockwise through anticlockwise thread movable connection between the inner screw and the groove in the top end of the screw, so that the nut is effectively prevented from loosening, the nut is protected against damage and corrosion, and the anti-loosening nut is simple in structure, convenient to use, effective and high in practicability.

Description

Technical Field

[0001] The invention relates to the field of bolts, in particular to a bolt without loosening a nut. Background Art

[0002] A bolt is an anchoring device that can be installed by drilling a hole in an object. It is widely used in the field of equipment fastening and connection. However, during the use of conventional bolts, the nut will usually loosen due to reasons such as equipment vibration. Summary of the Invention

[0003] In order to solve the problem that the existing conventional screw nut is easy to loosen, the present invention provides a bolt with a nut that does not loosen.

[0004] The present invention is implemented by adopting the following technical solution: a bolt that does not loosen the nut, comprising a screw rod, a nut and a nut fixing sleeve, wherein the screw rod is provided with a clockwise external thread on the outside; the nut is provided with a clockwise thread; the top end of the screw rod is provided with a groove; the inside of the nut fixing sleeve is hollow, and the lower end of the nut fixing sleeve has an opening, the shape of which corresponds to the shape of the nut; the nut is placed in the opening at the lower end of the nut fixing sleeve.

[0005] Furthermore, the inner wall of the groove at the top of the screw is provided with a counterclockwise thread; an inner screw is provided in the groove at the top of the screw, and a counterclockwise thread is provided on the outside of the inner screw; the inner screw is movably connected to the groove at the top of the screw through the counterclockwise thread.

[0006] Furthermore, a polygonal groove is provided at the top of the inner screw; a polygonal fixing column is provided at the top inner side of the nut fixing sleeve, and its shape corresponds to the polygonal groove; the polygonal fixing column is fixedly connected to the top inner side of the nut fixing sleeve; the polygonal fixing column is movably connected to the inner screw through the polygonal groove.

[0007] Furthermore, a rubber gasket is provided between the bottom of the inner screw and the bottom of the groove at the top end of the screw;

[0008] Furthermore, a positioning bead is provided at the lower end of the polygonal fixing column at the top inside the nut fixing sleeve; a positioning groove is provided at the lower end of the inner wall of the polygonal groove of the inner screw; the nut fixing sleeve is fixed on the nut through the positioning bead and the positioning groove, and is not easy to fall off the nut.

[0009] Compared with the prior art, the present invention has the following beneficial effects: With the above design, when fixing the screw, tighten the nut and screw the inner screw into the groove at the top of the screw through the counterclockwise thread. The bottom of the inner screw is in full contact with the bottom of the groove at the top of the screw without any gap. Then, the orientation of the polygonal groove in the inner screw is fine-tuned through the rubber gasket between the bottom of the inner screw and the bottom of the groove at the top of the screw. When the nut fixing sleeve is put on the nut, the polygonal fixing column at the top of the inner part of the nut fixing sleeve can be inserted into the groove of the inner screw. In this way, when the fixed equipment vibrates, the nut will loosen and the friction force will be transmitted to the polygonal fixing column at the top of the inner part of the nut fixing sleeve, so that the polygonal fixing column At the same time, it rotates counterclockwise, and the inner screw that fixes the polygonal fixing column has been tightly fixed to the screw through the counterclockwise thread. The counterclockwise rotation force on the polygonal fixing column cannot make the inner screw rotate counterclockwise. If the inner screw does not rotate counterclockwise, the polygonal fixing column cannot rotate counterclockwise. At the same time, the nut cannot rotate counterclockwise. The counterclockwise friction force generated by the vibration of the equipment on the nut is prevented, and the nut will not loosen. The nut fixing sleeve is sleeved on the outside of the nut, which can effectively protect the nut from damage and corrosion and extend the service life of the screw. The present invention has a simple structure, is easy to use, effective and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the top view of the structure of the present invention;

[0011] Figure 2 Schematic diagram of the slope structure of the present invention;

[0012] Figure: 1, screw; 2, nut; 3, nut fixing sleeve; 4, clockwise external thread; 5, clockwise thread; 6, groove; 7, counterclockwise thread; 8, internal screw; 9, polygonal groove; 10, polygonal fixing column; 11, rubber gasket; 12, positioning bead; 13, positioning groove; Specific implementation

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] like Figure 1-2 As shown, a bolt that does not loosen the nut includes a screw 1, a nut 2 and a nut fixing sleeve 3. The screw 1 is provided with a clockwise external thread 4 on the outside; the nut 2 is provided with a clockwise thread 5; the top of the screw 1 is provided with a groove 6; the inside of the nut fixing sleeve 3 is empty, and the lower end of the nut fixing sleeve 3 corresponds to the shape of the nut 2; the nut 2 is placed in the lower end of the nut fixing sleeve 3.

[0015] Furthermore, the inner wall of the groove 6 at the top of the screw 1 is provided with a counterclockwise thread 7; an inner screw 8 is provided in the groove at the top of the screw, and a counterclockwise thread 7 is provided on the outside of the inner screw 8; the inner screw 8 is movably connected to the groove 6 at the top of the screw 1 through the counterclockwise thread 7.

[0016] Furthermore, a polygonal groove 9 is provided at the top of the inner screw 8; a polygonal fixing column 10 is provided at the top inner end of the nut fixing sleeve 3, and its shape corresponds to the polygonal groove 9; the polygonal fixing column 10 is fixedly connected to the top inner end of the nut fixing sleeve 3; the polygonal fixing column 10 is movably connected to the inner screw 8 through the polygonal groove 9.

[0017] Furthermore, a rubber gasket 11 is provided between the bottom of the inner screw 8 and the bottom of the groove at the top end of the screw;

[0018] Furthermore, a positioning bead 12 is provided at the lower end of the top polygonal fixing column 10 inside the nut fixing sleeve 3; a positioning groove 13 is provided at the lower end of the inner wall of the polygonal groove 9 of the inner screw 8; the nut fixing sleeve 3 is fixed to the nut 2 through the positioning bead 12 and the positioning groove 13, and is not easy to fall off the nut.

[0019] The present invention fixes the nut fixing 3 on the nut 2 through the polygonal fixing column 10, so that the nut 2, the nut fixing sleeve 3 and the inner screw 8 in the top groove 6 of the screw 1 form a whole, and utilizes the counterclockwise thread 7 between the inner screw 5 and the top groove 6 of the screw 1 to prevent the nut 2 from rotating counterclockwise, thereby effectively preventing the nut 2 from loosening and protecting the nut 2 from damage and corrosion.

[0020] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A bolt that does not loosen a nut, comprising a screw rod, a nut, and a nut fixing sleeve, characterized in that: The outside of the screw is provided with a clockwise external thread; the nut is provided with a clockwise thread; the top of the screw is provided with a groove; the inside of the nut fixing sleeve is empty, and the lower end of the nut fixing sleeve has an opening, whose shape corresponds to the shape of the nut; the nut is placed in the opening at the lower end of the nut fixing sleeve.

2. A bolt without loosening the nut according to claim 1, characterized in that: The inner wall of the groove at the top of the screw is provided with a counterclockwise thread; an inner screw is provided in the groove at the top of the screw, and a counterclockwise thread is provided on the outside of the inner screw; the inner screw is movably connected to the groove at the top of the screw through the counterclockwise thread.

3. The bolt without loosening the nut according to claim 1 is characterized in that: A polygonal groove is provided at the top of the inner screw; a polygonal fixing column is provided at the top inner end of the nut fixing sleeve, and its shape corresponds to the polygonal groove; the polygonal fixing column is fixedly connected to the top inner end of the nut fixing sleeve; the polygonal fixing column is movably connected to the inner screw through the polygonal groove.

4. The bolt without loosening the nut according to claim 1, characterized in that: A rubber gasket is provided between the bottom of the inner screw and the bottom of the groove at the top end of the screw.

5. The bolt without loosening the nut according to claim 1, characterized in that: A positioning bead is provided at the lower end of the polygonal fixing column at the top inside the nut fixing sleeve; a positioning groove is provided at the lower end of the inner wall of the polygonal groove of the inner screw; the nut fixing sleeve is fixed on the nut through the positioning bead and the positioning groove, and is not easy to fall off the nut.

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