Anti-theft bolt

Abstract

The utility model discloses an anti-theft bolt, and relates to the technical field of bolts. The anti-theft bolt comprises a threaded rod and a fixing nut fixedly connected to the top of the threaded rod, and a cross groove is formed in the center of the top of the fixing nut. Through the arrangement of the inserting groove and the inserting rod, after the bolt is installed and fixed, the cover plate is connected to the outer surface of the fixing nut in a sleeving mode, the cross-shaped groove can be shielded, the threaded rod is difficult to rotate through the cross-shaped groove after the bolt is installed, the inserting rod cannot be pulled out after being inserted into the inserting groove, and meanwhile the inserting rod cannot be pulled out when forcibly disassembled. Due to the shapes of a clamping block and a clamping groove, when the inserting rod slides downwards, the clamping block can automatically contract towards the interior of the sliding groove due to friction force, after the inserting rod is completely inserted into the inserting groove, the clamping block automatically pops up to be clamped into the clamping groove, and therefore the anti-theft effect of the bolt is greatly improved. And the stability after the cover plate and the threaded rod are assembled is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to an anti-theft bolt. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener that is matched with a nut. A type of fastener consisting of a head and a screw (a cylinder with external threads), which must be matched with a nut to fasten two parts with through holes. The safety of bolt and nut fasteners in outdoor infrastructure is very important, such as the bolt and nut fasteners used in infrastructure such as railways, highway bridges, transmission towers, microwave communication towers, etc.

[0003] For example, patent number CN202021129785.X, specifically named as an anti-theft bolt, comprising a bolt body and an anti-theft cover, the bolt body comprising a bolt head and a screw, the bolt head being formed by radially cutting a hemispherical ball head and having a cross-shaped groove on the cutting surface, the anti-theft cover being covered on the bolt head and the inner cavity of the anti-theft cover being adapted to the shape and size of the bolt head, and the inner wall of the anti-theft cover being provided with a buckle that can form a snap fit with the cross-shaped groove;

[0004] Although the anti-theft bolts in this patent have a certain anti-theft effect, the bolts can still be removed. At the same time, after being used for too long or encountering forced demolition, since the plug shaft is relatively fragile, if the plug shaft breaks, it is easy to remain inside the cross groove, which will also affect the stability of the anti-theft cover. It does not have a complete anti-theft effect and has poor practicality. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an anti-theft bolt, which solves the problem that the existing anti-theft bolts do not have a complete anti-theft effect.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: an anti-theft bolt, comprising a threaded rod and a fixing nut fixedly connected to the top of the threaded rod, a cross groove is provided at the top center of the fixing nut, slots are provided at the four corners of the upper surface of the fixing nut, a cover plate is fixedly sleeved on the outer surface of the fixing nut, an insertion rod is fixedly connected to the inside of the cover plate at equal intervals, a sliding groove is provided inside the insertion rod, a spring is movably installed inside the sliding groove, a sliding plate is slidably connected to the inside of the sliding groove, a clamping block is fixedly connected to the surface of the sliding plate away from the spring, and a clamping groove is provided on the inner wall of the slot.

[0007] Preferably, the number of the slots and the number of the insertion rods are both four.

[0008] Preferably, the outer surface of the insertion rod is inserted into the interior of the slot, and the sizes of the insertion rod and the slot match.

[0009] Preferably, one end of the clamping block close to the sliding plate extends into the interior of the sliding groove, and the outer surface of the clamping block is slidably connected to the interior of the insertion rod.

[0010] Preferably, the sizes of the card block and the card slot match, and both the card block and the card slot are trapezoidal.

[0011] Preferably, the block extends away from the surface of the sliding plate to the outer surface of the insertion rod.

[0012] Beneficial Effects

[0013] The utility model provides an anti-theft bolt. Compared with the prior art, it has the following beneficial effects:

[0014] 1. The anti-theft bolt is provided with a slot and an insertion rod. After the bolt is installed and fixed, the cross slot can be covered by sleeve-fitting a cover plate on the outer surface of the fixing nut, so that after the bolt is installed, it is difficult to rotate the threaded rod through the cross slot, and the insertion rod cannot be pulled out after being inserted into the slot. At the same time, when forced demolition is encountered, the insertion rod is difficult to be damaged, which greatly enhances the anti-theft effect of the bolt.

[0015] 2. Due to the shapes of the card block and the card slot, when the insertion rod slides downward, the card block can automatically shrink into the sliding slot due to friction. When the insertion rod is fully inserted into the slot, the card block automatically pops out and engages with the inside of the card slot, thereby enhancing the stability of the cover plate and the threaded rod after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the cover plate in the utility model;

[0018] Figure 3 It is a cross-sectional view of the insertion rod in the utility model;

[0019] Figure 4 It is a cross-sectional view of the fixing nut in the utility model.

[0020] In the figure: 1. threaded rod; 2. fixing nut; 3. cross slot; 4. slot; 5. cover plate; 6. plug rod; 7. sliding slot; 8. spring; 9. sliding plate; 10. clamp block; 11. clamp slot. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-4 The utility model provides a technical solution: an anti-theft bolt, comprising a threaded rod 1 and a fixing nut 2 fixedly connected to the top of the threaded rod 1, a cross groove 3 is opened at the top center of the fixing nut 2, and slots 4 are opened at the four corners of the upper surface of the fixing nut 2, and a cover plate 5 is fixedly sleeved on the outer surface of the fixing nut 2, and a plug rod 6 is fixedly connected to the inside of the cover plate 5 at equal intervals, and the number of the slots 4 and the plug rod 6 is four, and the outer surface of the plug rod 6 is inserted into the inside of the slot 4, and the size of the plug rod 6 and the slot 4 match, and a sliding groove 7 is opened inside the plug rod 6, and a spring 8 is movably installed inside the sliding groove 7, and a sliding plate 9 is slidably connected to the inside of the sliding groove 7. By setting the slot 4 and the plug rod 6, when the bolt is installed and fixed, the cross groove 3 can be blocked by sleeved on the cover plate 5 on the outer surface of the fixing nut 2, so that after the bolt is installed, it is difficult to rotate the threaded rod 1 through the cross groove 3, and the plug rod 6 cannot be pulled out after being inserted into the slot 4, which greatly enhances the anti-theft effect of the bolt;

[0023] A block 10 is fixedly connected to the surface of the sliding plate 9 away from the spring 8, and the surface of the block 10 away from the sliding plate 9 extends to the outer surface of the insertion rod 6, and the end of the block 10 close to the sliding plate 9 extends to the inside of the sliding groove 7. The outer surface of the block 10 is slidably connected to the inside of the insertion rod 6, and a groove 11 is provided on the inner wall of the slot 4. The sizes of the block 10 and the groove 11 match, and the block 10 and the groove 11 are both trapezoidal. Due to the shapes of the block 10 and the groove 11, when the insertion rod 6 slides downward, the block 10 can automatically shrink into the sliding groove 7 due to friction. When the insertion rod 6 is fully inserted into the slot 4, the block 10 automatically pops out and engages with the inside of the groove 11, thereby enhancing the stability of the cover plate 5 and the threaded rod 1 after assembly.

[0024] During operation, after installing the bolt at the specified position, place the cover plate 5 above the fixing nut 2, align the insertion rod 6 with the inside of the slot 4, and insert it. At this time, the cover plate 5 is sleeved on the outer surface of the fixing nut 2. When the cover plate 5 is completely in contact with the surface of the fixing nut 2, the insertion rod 6 is completely inserted into the inside of the slot 4, and the outer surface of the clamping block 10 will be clamped in the inside of the clamping slot 11. At this time, the assembly between the cover plate 5 and the slot 4 is completed, and the cross groove 3 can be blocked, so that after the bolt is installed, it is difficult to rotate the threaded rod 1 through the cross groove 3, and after the insertion rod 6 is inserted into the inside of the slot 4, it cannot be pulled out. At the same time, when encountering forced demolition, the insertion rod 6 is difficult to be damaged, which greatly enhances the anti-theft effect of the bolt.

[0025] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. An anti-theft bolt, comprising a threaded rod (1) and a fixing nut (2) fixedly connected to the top of the threaded rod (1), characterized in that: A cross groove (3) is provided at the center of the top of the fixing nut (2), and slots (4) are provided at the four corners of the upper surface of the fixing nut (2). A cover plate (5) is fixedly sleeved on the outer surface of the fixing nut (2), and an insertion rod (6) is fixedly connected to the inside of the cover plate (5) at equal intervals. A sliding groove (7) is provided inside the insertion rod (6), and a spring (8) is movably installed inside the sliding groove (7). A sliding plate (9) is slidably connected to the inside of the sliding groove (7), and a clamping block (10) is fixedly connected to the surface of the sliding plate (9) away from the spring (8), and a clamping groove (11) is provided on the inner wall of the slot (4).

2. The anti-theft bolt according to claim 1, characterized in that: The number of the slots (4) and the number of the insertion rods (6) are both four.

3. The anti-theft bolt according to claim 1, characterized in that: The outer surface of the insertion rod (6) is inserted into the interior of the slot (4), and the sizes of the insertion rod (6) and the slot (4) match.

4. The anti-theft bolt according to claim 1, characterized in that: One end of the clamping block (10) close to the sliding plate (9) extends into the interior of the sliding groove (7), and the outer surface of the clamping block (10) is slidably connected to the interior of the insertion rod (6).

5. The anti-theft bolt according to claim 1, characterized in that: The sizes of the card block (10) and the card slot (11) match each other, and both the card block (10) and the card slot (11) are trapezoidal.

6. The anti-theft bolt according to claim 1, characterized in that: The clamping block (10) extends away from the surface of the sliding plate (9) to the outer surface of the insertion rod (6).

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