Fastener anti-loosening structure

Abstract

The fastener anti-loosening structure comprises a vertical groove formed in the top of a bolt, a transverse groove is formed in an inner cavity of the vertical groove, the inner cavity of the vertical groove is connected with an I-shaped block in a sliding mode, the left side and the right side of the I-shaped block are both fixedly connected with bent spring pieces, the bent spring pieces are connected with the inner cavity of the vertical groove in a sliding mode, and the transverse groove is connected with the transverse groove in a sliding mode. The left side and the right side of the transverse groove are both connected with rectangular blocks in a sliding mode, the opposite ends of the two bent spring pieces abut against the surfaces of the two rectangular blocks respectively, the I-shaped blocks slide to drive the bent spring pieces to slide downwards, then the bent spring pieces rebound and unfold, the rectangular blocks are pushed and limited, and therefore the bent spring pieces and the rectangular blocks can be separated from each other. And the rectangular block is embedded into the inner cavity of the rectangular groove, so that the purpose of keeping the installed bolt and nut stable for a long time and avoiding nut loosening caused by subsequent touch or long-time exposure can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and particularly relates to an anti-loosening structure for fasteners. Background Technique

[0002] Fasteners, also known as standard parts in the market, are mechanical components that can mechanically fix or bond two or more components together. They are characterized by a wide variety of varieties and specifications, different performance and uses, and a very high degree of standardization, serialization, and generalization.

[0003] Among them, bolts and nuts are typical components in fasteners, and they have excellent fastening performance. However, after installation, the nut may become loose due to subsequent contact or long-term exposure. In order to keep the bolt and nut stable for a long time after installation, an anti-loosening structure for fasteners is designed. This structure mainly uses the rectangular block in the inner cavity of the bolt to cooperate with the rectangular groove at the top of the nut. After the nut is threadedly connected to the bolt, the rectangular block can be fitted into the inner cavity of the rectangular groove, so that the rectangular groove can be more fixed after being threadedly connected to the bolt, that is, the bolt and nut after installation can be kept stable for a long time to avoid the situation of nut loosening caused by subsequent contact or long-term exposure. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an anti-loosening structure for fasteners, which has the purpose of keeping the bolt and nut stable for a long time after installation to avoid the nut loosening caused by subsequent contact or long-term exposure, so as to solve the above-mentioned background technical problems.

[0005] The technical solution of the utility model to solve the above technical problems is as follows: an anti-loosening structure for fasteners, which includes a vertical groove opened at the top of the bolt: a horizontal groove is opened in the inner cavity of the vertical groove, an I-shaped block is slidably connected in the inner cavity of the vertical groove, bending spring pieces are fixedly connected to both the left and right sides of the I-shaped block, the bending spring pieces are slidably connected to the inner cavity of the vertical groove, rectangular blocks are slidably connected to both the left and right sides of the horizontal groove, and the opposite ends of the two bending spring pieces respectively abut against the surfaces of the two rectangular blocks. A trapezoidal head is fixedly connected to the bottom of the I-shaped block, spring pieces are fixedly connected to both the left sides of the bottom of the inner cavity of the vertical groove, and limiting pieces are rotatably connected to both the left and right sides of the bottom of the inner cavity of the vertical groove.

[0006] Preferably, trapezoidal grooves are opened on both the left and right sides of the bottom of the trapezoidal head, trapezoidal blocks are fixedly connected to the opposite sides of the two limiting pieces, and the trapezoidal blocks are fitted into the inner cavity of the trapezoidal grooves.

[0007] Preferably, the limiting pieces are fixedly connected to the spring pieces, a spring is fixedly connected to the bottom of the inner cavity of the bolt, and the top of the spring is fixedly connected to the bottom of the trapezoidal head.

[0008] Preferably, limiting grooves are provided on both the upper and lower sides of the horizontal groove, limiting bars are fixedly connected to both the upper and lower sides of the rectangular block, and the surface of the limiting bar is slidably connected to the inner cavity of the limiting groove.

[0009] Preferably, an extension block is fixedly connected to the top of the I-shaped block, a nut is threadedly connected to the surface of the bolt, and a rectangular groove is provided at the top of the nut.

[0010] Preferably, a rough surface piece one is fixedly connected to the bottom of the nut, and a rough surface piece two is slidably connected to the surface of the bolt.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. By sliding the I-shaped block and driving the bent spring piece to slide downward, then the bent spring piece rebounds and unfolds, and the rectangular block is pushed and limited, so that the rectangular block is fitted into the inner cavity of the rectangular groove, the purpose of keeping the bolt and nut stable for a long time after installation can be achieved, so as to avoid the nut from loosening due to subsequent touch or long-term exposure.

[0013] 2. Through the arrangement of the spring, the trapezoidal head can obtain an upward supporting force, which can further fix the position of the trapezoidal head when the limiting piece and the spring piece limit the trapezoidal head.

[0014] 3. By the combined use of the rough surface piece one and the rough surface piece two, when the bolt and the nut fix the object to be fixed, the friction force between the bolt and the nut and the object can be increased, so as to further improve the fixation of the bolt and the nut to the object. Description of the Drawings

[0015] Among them:

[0016] Figure 1 is the front view and exploded view of an embodiment of the present utility model;

[0017] Figure 2 is the internal cavity structure diagram of the bolt of an embodiment of the present utility model;

[0018] Figure 3 is the structure diagram of the bolt internal cavity after limiting of an embodiment of the present utility model;

[0019] Figure 4 is the schematic diagram of the nut of an embodiment of the present utility model;

[0020] Figure 5 is the partial schematic diagram of the bolt internal cavity of an embodiment of the present utility model;

[0021] Figure 6Partial schematic view of the inner cavity structure of a bolt according to an embodiment of the present utility model;

[0022] Figure 7 An embodiment of the present utility model Figure 6 Partial enlarged view of point A in it.

[0023] In the drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Bolt, 2. I-shaped block, 3. Bent spring piece, 4. Rectangular block, 5. Trapezoidal head, 6. Spring piece, 7. Limiting piece, 8. Spring, 9. Limiting strip, 10. Extended block, 11. Nut, 12. Rectangular groove, 13. Rough surface piece one, 14. Rough surface piece two. Specific implementation mode

[0025] Hereinafter, embodiments of the anti-loosening structure of the fastener of the present utility model will be described with reference to the drawings.

[0026] Embodiment 1:

[0027] Figures 1-7 An anti-loosening structure of a fastener according to an embodiment of the present utility model is shown, which includes: a vertical groove opened at the top of the bolt 1; a horizontal groove is opened in the inner cavity of the vertical groove, an I-shaped block 2 is slidably connected to the inner cavity of the vertical groove, bent spring pieces 3 are fixedly connected to both the left and right sides of the I-shaped block 2, the bent spring pieces 3 are slidably connected to the inner cavity of the vertical groove, rectangular blocks 4 are slidably connected to both the left and right sides of the horizontal groove, and the opposite ends of the two bent spring pieces 3 respectively abut against the surfaces of the two rectangular blocks 4. A trapezoidal head 5 is fixedly connected to the bottom of the I-shaped block 2. Spring pieces 6 are fixedly connected to both the left sides of the bottom of the inner cavity of the vertical groove. Limiting pieces 7 are rotatably connected to both the left and right sides of the bottom of the inner cavity of the vertical groove. Trapezoidal grooves are opened on both the left and right sides of the bottom of the trapezoidal head 5. Trapezoidal blocks are fixedly connected to the opposite sides of the two limiting pieces 7. The trapezoidal blocks are fitted into the inner cavity of the trapezoidal groove. The limiting pieces 7 are fixedly connected to the spring pieces 6. A spring 8 is fixedly connected to the bottom of the inner cavity of the bolt 1. Through the arrangement of the spring 8, an upward tightening force can be obtained for the trapezoidal head 5, so that when the limiting pieces 7 and the spring pieces 6 limit the trapezoidal head 5, the position of the trapezoidal head 5 can be further fixed. The top of the spring 8 is fixedly connected to the bottom of the trapezoidal head 5. Limiting grooves are opened on both the upper and lower sides of the horizontal groove. Limiting strips 9 are fixedly connected to both the upper and lower sides of the rectangular block 4. The surface of the limiting strip 9 is slidably connected to the inner cavity of the limiting groove.

[0028] Embodiment 2:

[0029] Figures 1-7Show a fastening element anti-loosening structure of an embodiment of the present utility model, which includes: a vertical groove opened at the top of the bolt 1; a horizontal groove is opened in the inner cavity of the vertical groove, an I-shaped block 2 is slidably connected in the inner cavity of the vertical groove, both left and right sides of the I-shaped block 2 are fixedly connected with bent spring pieces 3, the bent spring pieces 3 are slidably connected with the inner cavity of the vertical groove, both left and right sides of the horizontal groove are slidably connected with rectangular blocks 4, and the opposite ends of the two bent spring pieces 3 respectively abut against the surfaces of the two rectangular blocks 4. A trapezoidal head 5 is fixedly connected to the bottom of the I-shaped block 2, spring pieces 6 are fixedly connected to both left sides of the bottom of the inner cavity of the vertical groove, and limiting pieces 7 are rotatably connected to both left and right sides of the bottom of the inner cavity of the vertical groove. An extension block 10 is fixedly connected to the top of the I-shaped block 2, a nut 11 is threadedly connected to the surface of the bolt 1, a rectangular groove 12 is opened at the top of the nut 11, a rough surface piece one 13 is fixedly connected to the bottom of the nut 11, and a rough surface piece two 14 is slidably connected to the surface of the bolt 1. By the combined use of the rough surface piece one 13 and the rough surface piece two 14, when the bolt 1 and the nut 11 fix an object to be fixed, the friction between the bolt 1 and the nut 11 and the object can be increased, so that the fixation of the bolt 1 and the nut 11 to the object is further improved.

[0030] Working principle: When the present utility model is used, the user threadedly connects the nut and the bolt, presses down the extension block 10 to drive the I-shaped block 2 to slide downward, then makes the bent spring pieces 3 slide downward, and under the action of the horizontal groove, the bent spring pieces 3 rebound and unfold, thereby pushing and limiting the rectangular block 4, so that the rectangular block 4 is fitted into the inner cavity of the rectangular groove 12. At the same time, under the action of the spring piece 6 and the limiting piece 7, the trapezoidal block is fitted into the trapezoidal groove on the surface of the trapezoidal head 5, then the position of the I-shaped block 2 is kept fixed, and further the bent spring pieces 3 keep the limiting state of the rectangular block 4, so that the installed bolt and nut can be kept stable for a long time, to avoid the situation of nut loosening caused by subsequent touch or long-term exposure.

[0031] In summary: For this fastening element anti-loosening structure, by sliding the I-shaped block 2 and driving the bent spring pieces 3 to slide downward, then making the bent spring pieces 3 rebound and unfold, and pushing and limiting the rectangular block 4, so that the rectangular block 4 is fitted into the inner cavity of the rectangular groove 12, the purpose of keeping the installed bolt and nut stable for a long time can be achieved, to avoid the situation of nut loosening caused by subsequent touch or long-term exposure.

Claims

1. A fastener anti-loosening structure, characterized in that: The invention comprises a vertical slot formed at the top of a bolt (1); a horizontal slot is formed in the inner cavity of the vertical slot; an I-shaped block (2) is slidably connected to the inner cavity of the vertical slot; a bent spring sheet (3) is fixedly connected to the left and right sides of the I-shaped block (2); the bent spring sheet (3) is slidably connected to the inner cavity of the vertical slot; a rectangular block (4) is slidably connected to the left and right sides of the horizontal slot; the opposite ends of the two bent spring sheets (3) respectively contact the surfaces of the two rectangular blocks (4); a trapezoidal head (5) is fixedly connected to the bottom of the I-shaped block (2); spring sheets (6) are fixedly connected to the left and right sides of the bottom of the inner cavity of the vertical slot; and a limit plate (7) is rotatably connected to the left and right sides of the bottom of the inner cavity of the vertical slot.

2. A fastener anti-loosening structure according to claim 1, characterized in that: The left and right sides of the bottom of the trapezoidal head (5) are both provided with trapezoidal grooves, and the opposite sides of the two limiting pieces (7) are both fixedly connected with trapezoidal blocks, and the trapezoidal blocks are embedded in the inner cavity of the trapezoidal grooves.

3. A fastener anti-loosening structure according to claim 2, characterized in that: The limiting plate (7) is fixedly connected to the spring plate (6), the bottom of the inner cavity of the bolt (1) is fixedly connected to a spring (8), and the top of the spring (8) is fixedly connected to the bottom of the trapezoidal head (5).

4. A fastener anti-loosening structure according to claim 3, characterized in that: Limiting grooves are provided on both the upper and lower sides of the transverse groove, and limiting strips (9) are fixedly connected to both the upper and lower sides of the rectangular block (4), and the surface of the limiting strip (9) is slidably connected to the inner cavity of the limiting groove.

5. A fastener anti-loosening structure according to claim 4, characterized in that: The top of the I-shaped block (2) is fixedly connected with an extension block (10), the surface of the bolt (1) is threadedly connected with a nut (11), and the top of the nut (11) is provided with a rectangular groove (12).

6. A fastener anti-loosening structure according to claim 5, characterized in that: A rough surface piece 1 (13) is fixedly connected to the bottom of the nut (11), and a rough surface piece 2 (14) is slidably connected to the surface of the bolt (1).

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