Anti-loosening outer hexagon bolt with left-hand threads

Abstract

The utility model discloses a left-hand thread anti-loosening outer hexagon bolt which comprises a screw rod and a bolt head fixedly connected to the top of the screw rod, the screw rod is sleeved with a nut in a threaded mode, a limiting mechanism is arranged in the screw rod, and the limiting mechanism comprises an inserting groove, a movable pin, a pressing rod, a groove, a set of sliding grooves, a sliding block, a sliding rod, a spring and a limiting block. The anti-loose nut has the advantages that through the limiting mechanism arranged in the screw rod, after the nut is tightened, the movable pin is inserted into the screw rod, and the nut is limited and locked through the limiting block at the front end of the sliding rod, so that the anti-loose purpose is achieved, and when the anti-loose nut is disassembled, the pressing rod is pressed downwards, the limiting block is retracted, and the movable pin is pulled out, so that the anti-loose nut is convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of hexagonal bolts, in particular to a reverse thread anti-loosening external hexagonal bolt. Background Art

[0002] Hexagonal bolts refer to fasteners consisting of a head and a screw. Bolts are divided into iron bolts and stainless steel bolts according to their materials, namely hexagonal head bolts (partial thread)-Grade C and hexagonal head bolts (full thread)-Grade C, also known as hexagonal head bolts (rough), rough hexagonal head bolts, and black iron screws.

[0003] The existing patent application number is CN 202220806070.6, which discloses a reverse thread anti-loosening external hexagonal bolt. After the external hexagonal bolt is driven into the corresponding object's drill hole, the pressing plate fits with the bottom of the drill hole. When the external hexagonal bolt continues to be rotated, the center column will push the two sets of special-shaped blocks to move away from each other, so that the two sets of tip blocks are embedded in the corresponding object, thereby reinforcing the external hexagonal bolt. However, the external hexagonal bolt is only suitable for threaded drilling installation, and cannot effectively fix the fixing of the set nut and prevent loosening.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0005] In view of the above defects, the utility model provides a reverse thread anti-loosening external hexagonal bolt to solve the problem of anti-loosening of the reverse thread external hexagonal bolt.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A reverse thread anti-loosening external hexagonal bolt, comprising a screw rod and a bolt head fixedly connected to the top of the screw rod, a nut is threadedly sleeved on the screw rod, and a limiting mechanism is arranged inside the screw rod;

[0008] The limiting mechanism includes an insertion slot, a movable pin, a pressing rod, a groove, a group of slide grooves, a sliding block, a sliding rod, a spring and a limiting block. The insertion slot is opened in the screw rod, the movable pin is movably inserted in the insertion slot, the pressing rod is movably inserted in the movable pin, the groove is opened in the movable pin, a group of slide grooves are opened at the rear end of the groove, the sliding block is slidably installed on a group of slide grooves, the sliding rod is movably inserted on one side of the bottom of the movable pin, and the rear end is connected to the sliding block, the spring is movably sleeved on the outer surface of the rear end of the sliding rod, and the limiting block is installed at the front end of the sliding rod.

[0009] Furthermore, a pressing head is fixedly connected to the upper end of the movable pin.

[0010] Furthermore, an inclined sliding groove is provided on the sliding block, and the bottom of the pressing rod is slidably installed in the inclined sliding groove through a circular sliding block.

[0011] Furthermore, the outer surface of the screw rod is tapped with a reverse thread, and a strip-shaped hole corresponding to the limit block is opened inside the bolt head and on one side of the screw rod.

[0012] Furthermore, an annular groove corresponding to the limiting block is opened in the nut.

[0013] The utility model provides a reverse thread anti-loosening external hexagonal bolt, which has the following beneficial effects: through the limiting mechanism provided in the screw rod, when the nut is tightened, the movable pin is inserted into the screw rod, and the nut is limited and locked by the limiting block at the front end of the sliding rod, so as to achieve the purpose of preventing loosening; when disassembling, the pressing rod is pressed downward to retract the limiting block, and the movable pin can be pulled out and inserted, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a reverse thread anti-loosening external hexagonal bolt described in the utility model.

[0015] Figure 2 It is a cross-sectional view of the movable pin described in the utility model.

[0016] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0017] Figure 4 This is a cross-sectional view of the nut described in the utility model.

[0018] Figure 5 This is an appearance diagram of a reverse-threaded anti-loosening external hexagonal bolt described in the utility model.

[0019] In the figure: 1. screw rod; 2. bolt head; 3. nut; 4. insertion groove; 5. movable pin; 6. pressing rod; 7. groove; 8. slide groove; 9. sliding block; 10. sliding rod; 11. spring; 12. limit block; 13. pressing head; 14. inclined slide groove; 15. circular slider; 16. reverse thread; 17. strip hole; 18. annular groove. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with the accompanying drawings. Figure 1-5As shown: a reverse thread anti-loosening external hexagonal bolt, including a screw rod 1 and a bolt head 2 fixedly connected to the top of the screw rod 1, a nut 3 is threadedly sleeved on the screw rod 1, and a limiting mechanism is arranged in the screw rod 1; the limiting mechanism includes an insertion groove 4, a movable pin 5, a pressing rod 6, a groove 7, a group of slide grooves 8, a sliding block 9, a sliding rod 10, a spring 11 and a limiting block 12, the insertion groove 4 is opened in the screw rod 1, the movable pin 5 is movably inserted in the insertion groove 4, the pressing rod 6 is movably inserted in the movable pin 5, the groove 7 is opened in the movable pin 5, a group of slide grooves 8 are opened at the rear end of the groove 7, and the sliding block 9 is slidably installed in a group of slide grooves 8, the sliding rod 10 is movably inserted on one side of the bottom of the movable pin 5, and the rear end is connected to the sliding block 9, the spring 11 is movably sleeved on the outer surface of the rear end of the sliding rod 10, and the limit block 12 is installed at the front end of the sliding rod 10; the upper end of the movable pin 5 is fixedly connected with a pressing head 13; the sliding block 9 is provided with an inclined slide groove 14, and the bottom of the pressing rod 6 is slidably installed in the inclined slide groove 14 through a circular slider 15; the outer surface of the screw 1 is tapped with a reverse thread 16, and a strip hole 17 corresponding to the limit block 12 is provided in the bolt head 2 and on one side of the screw 1; the nut 3 is provided with an annular groove 18 corresponding to the limit block 12.

[0021] Working principle of this embodiment: The external hexagonal bolt is made of high-strength steel, and the outer surface of the screw rod 1 is tapped with a reverse thread 16;

[0022] During installation: the insertion groove 4 is opened in the screw rod 1, the movable pin 5 is movably inserted in the insertion groove 4, the pressing rod 6 is movably inserted in the movable pin 5, the groove 7 is opened in the movable pin 5, a group of slide grooves 8 are opened at the rear end of the groove 7, the sliding block 9 is slidably installed on a group of slide grooves 8, the sliding rod 10 is movably inserted at one side of the bottom of the movable pin 5, and the rear end is connected to the sliding block 9, the spring 11 is movably sleeved on the outer surface of the rear end of the sliding rod 10, the limit block 12 is installed at the front end of the sliding rod 10, the upper end of the movable pin 5 is fixedly connected with a pressing head 13, the sliding block 9 is opened with an inclined slide groove 14, the bottom of the pressing rod 6 is slidably installed in the inclined slide groove 14 through a circular slider 15, a strip hole 17 corresponding to the limit block 12 is opened in the bolt head 2 and on one side of the screw rod 1, the strip hole 17 is located on the same verticality line, and an annular groove 18 corresponding to the limit block 12 is opened in the nut 3, such as Figure 2 — Figure 5 As shown, during installation, the user first inserts the screw rod 1 into the fixing hole of the fixing piece, and then tightens the nut 3. When preventing loosening, the user inserts the movable pin 5 into the insertion groove 4 of the screw rod 1, and makes the limiting block 12 face the strip hole 17. The limiting block 12 initially extends out of the movable pin 5. The user adjusts the depth of the movable pin 5 according to the position of the nut 3, so that the limiting block 12 at the front end of the sliding rod 10 is inserted into the annular groove 18 of the nut 3, thereby limiting and locking the nut to achieve the purpose of preventing loosening. Figure 1As shown, when the user holds the pressing head 13 and presses the pressing rod 6 downward, the sliding block 9 can be driven to deviate to the left through the bottom circular slider 15. At this time, the spring 11 is compressed and the limit block 12 at the front end of the sliding rod 10 is retracted, which is convenient for installing or removing the movable pin 5.

[0023] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the utility model. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the utility model and fall within the protection scope of the utility model.

Claims

1. A reverse thread anti-loosening external hexagonal bolt, comprising a screw rod (1) and a bolt head (2) fixedly connected to the top of the screw rod (1), characterized in that: The screw rod (1) has a nut (3) threadedly sleeved thereon, and a limiting mechanism is provided inside the screw rod (1); The limiting mechanism comprises an insertion groove (4), a movable pin (5), a pressing rod (6), a groove (7), a group of sliding grooves (8), a sliding block (9), a sliding rod (10), a spring (11) and a limiting block (12), wherein the insertion groove (4) is opened in the screw rod (1), the movable pin (5) is movably inserted in the insertion groove (4), the pressing rod (6) is movably inserted in the movable pin (5), the groove (7) is opened in the movable pin (5), a group of sliding grooves (8) is opened at the rear end of the groove (7), the sliding block (9) is slidably mounted on the group of sliding grooves (8), the sliding rod (10) is movably inserted at one side of the bottom of the movable pin (5), and the rear end is connected to the sliding block (9), the spring (11) is movably sleeved on the outer surface of the rear end of the sliding rod (10), and the limiting block (12) is mounted on the front end of the sliding rod (10).

2. The reverse thread anti-loosening external hexagonal bolt according to claim 1, characterized in that: The upper end of the movable pin (5) is fixedly connected to a pressing head (13).

3. The reverse thread anti-loosening external hexagonal bolt according to claim 1, characterized in that: The sliding block (9) is provided with an inclined sliding groove (14), and the bottom of the pressing rod (6) is slidably installed in the inclined sliding groove (14) via a circular sliding block (15).

4. The reverse thread anti-loosening external hexagonal bolt according to claim 1, characterized in that: The outer surface of the screw rod (1) is tapped with a reverse thread (16), and a strip hole (17) corresponding to the limit block (12) is opened inside the bolt head (2) and on one side of the screw rod (1).

5. The reverse thread anti-loosening external hexagonal bolt according to claim 1, characterized in that: The nut (3) is provided with an annular groove (18) corresponding to the limiting block (12).

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