CN101016917A - An anti-theft bolt and its matched special wrench - Google Patents

Abstract

The anti-theft bolt comprises a bolt body and a nut, wherein the nut of the bolt is a cylinder and is provided with threads in the same direction as the threads of the bolt body on the side surface, and the upper end of the nut is provided with a fixing block or a fixing groove. A positioning sheet is arranged between the screw cap and the bolt body. The special spanner for the anti-theft bolt has a tubular clamping end and threads on the inner walls of the two ends of the clamping end. The screw thread of one end is matched with the screw cap of the anti-theft bolt, and the other end is provided with a clamping rod with screw thread which is matched and movably connected with the screw thread of the other end. The inside of clamping end is equipped with the clamp bolt rather than sliding connection, and clamp bolt one end is equipped with and presss from both sides tight groove or the clamp block of bolt fixed block or fixed slot assorted, and the other end rotates with the clamping bar and is connected. The bolt can not be opened by using a non-special tool, and the anti-theft bolt cannot be opened under the condition that the fixing block or the fixing groove of the anti-theft bolt is not matched with the clamping bolt of the wrench.

Description

An anti-theft bolt and its matched special wrench

technical field

The invention relates to an anti-theft tool, in particular to an anti-theft bolt and a matching special wrench.

technical background

At present, many municipal facilities are often stolen, embezzled, and destroyed, such as manhole covers, street lighting facilities, cables, etc. When these facilities are installed, effective anti-theft measures are not used or only simple locks are used to prevent theft, which makes these facilities easy to be stolen and destroyed. And the production cost of the higher anti-theft equipment of existing security is higher, should not be used in large quantities.

Contents of the invention

The present invention is an anti-theft bolt and a special wrench matched with it. Its main purpose is that the anti-theft bolt needs to be used with a corresponding special wrench, and it is difficult to disassemble the bolt without using the matching special wrench, so as to effectively prevent theft , and has a wide range of applications, and can be equipped with different screws and special wrenches for different users. It has the characteristics of high safety, production difficulty and low cost, and is suitable for wide application on various equipment. The structure is strong and durable.

The present invention realizes above-mentioned technical purpose through following technical scheme:

An anti-theft bolt includes a bolt body and a nut. The nut of the bolt is a cylinder and is provided with threads in the same direction as the bolt body on the side, and a fixing block or a fixing groove is arranged on the upper end of the nut. A positioning piece is arranged between the nut and the bolt body, and when the anti-theft bolt is used, the positioning piece plays a role of clamping. The advantage of such a design is that ordinary pliers or other non-specialized tools cannot be used to open the bolt.

The fixed block or fixed groove set on the nut of the anti-theft bolt is spherical, conical or truncated, and the fixed block or fixed groove is small in size, and it can be equipped with special anti-theft bolts for different users only by changing its shape and size. , the advantage of this design is that different installation tools can be designed according to different customers. Anti-theft bolts are not easily unscrewed by ordinary pliers or other commonly used tools. Even if a special tool is used, it cannot be matched with the fixed block or the fixed groove of the anti-theft bolt, and the bolt cannot be opened.

The fixed block or the fixed groove is provided with a small friction groove to increase the friction between the special tool and the matching special tool to facilitate fixing and opening the anti-theft bolt. The shape of the spacer between the nut and the bolt body is circular, and the spacer can be integrated with the nut, that is, the diameter of the nut is greater than the diameter of the bolt body during production. The positioning piece can play the role of clamping and positioning, and it is integrated with the nut to facilitate the processing and production of the anti-theft bolt, reduce the cost, and increase the stability of the bolt structure.

A special wrench used for the above-mentioned anti-theft bolt, the clamping end of the wrench is tubular, and threads are provided on the inner walls of both ends of the clamping end. The thread at one end matches the nut of the above-mentioned anti-theft bolt, which plays the role of fixing the anti-theft bolt. The other end is provided with a threaded clamping rod that is movably connected with the thread at this end. When the clamping rod rotates, it will follow the direction of the thread. direction activity. Inside the clamping end, there is a clamping bolt and its sliding connection, which can slide freely inside the clamping end. One end of the clamping bolt is provided with a clamping groove or a clamping block that matches the above-mentioned bolt fixing block or fixing groove. One end is rotatably connected with the clamping rod, and can move up and down following the clamping rod. This special cooperation can open the above-mentioned matching anti-theft bolt, and cannot open the anti-theft bolt under the situation that the fixed block or the fixed groove of the anti-theft bolt do not match the clamping bolt of the wrench.

Compared with the prior art, the present invention has the following advantages:

The invention has the advantages of simple structure, firmness and durability, and easy processing and production.

It has a wide range of applications, and can be equipped with different screws and special wrench for different users, which has the characteristics of high safety.

The production difficulty is low, the cost is low, and it is suitable for being widely used in various equipment.

Description of drawings:

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

Fig. 1 is a structural schematic diagram of an anti-theft bolt according to an embodiment of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of an anti-theft bolt according to an embodiment of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of an anti-theft bolt according to Embodiment 2 of the present invention;

Fig. 4 is a schematic diagram of the structure of an anti-theft bolt according to Embodiment 3 of the present invention;

Fig. 5 is a schematic structural diagram of a supporting special wrench according to Embodiment 1 of the present invention;

Fig. 6 is a schematic structural diagram of a use state according to Embodiment 1 of the present invention;

Fig. 7 is a schematic cross-sectional structure diagram of the clamping bolt of the special wrench according to the second embodiment of the present invention.

Detailed ways

Embodiment 1: As shown in Figure 1, the anti-theft bolt includes a bolt body 1 and a nut 2. The nut 2 of this bolt is a cylinder and is provided with threads in the same direction as the bolt body 1 on the side. The bolt body 1 It can be integrally formed with the nut 2, which is convenient for production. A fixed block 14 is fixedly connected to the upper end of the nut 2, and the bolt body 1, the nut 2 and the fixed block 14 can also be made into one during production. As shown in FIG. 2 , a positioning piece 3 is provided between the nut 2 and the bolt body 1 , and the positioning piece 3 is fixedly connected with the bolt body 1 . The advantage of this design is that ordinary pliers or other non-specialized tools cannot be used to open the bolt.

As shown in Figure 1, the fixed block 14 set on the nut 2 of the anti-theft bolt is a truncated cone. Bolts are not easily unscrewed by ordinary pliers or other common tools. The fixed block 14 is provided with a small friction groove 5, which can increase the friction with the special tool, and facilitate the matching special tool to fix or open the anti-theft bolt. As shown in Figure 2, the shape of the positioning piece 3 between the nut 2 and the bolt body 1 is circular, and the positioning piece 3 can be integrated with the nut 2, that is, the diameter of the nut 2 is larger than the diameter of the bolt body 1 during production. , can also be welded to nut 2. It can play the role of clamping and positioning.

The special wrench of anti-theft bolt as shown in Figure 5 is made up of clamping end 51 and handle 52, and wrench clamping end 51 is tubular, is provided with screw thread on the inner wall of clamping end 51 two ends. As shown in Fig. 1 and Fig. 5, the thread 56 at one end matches the nut 2 of the above-mentioned anti-theft bolt, and plays the role of fixing the anti-theft bolt. As shown in FIG. 5 , the other end is provided with a threaded clamping rod 53 which is movably connected with the thread at this end. When the clamping rod 53 rotates, it will move along the direction of the thread. Inside the clamping end 51 , a clamping bolt 54 is slidably connected to it, so that the clamping bolt 54 can slide freely inside the clamping end 51 . As shown in Figures 2 and 5, one end of the clamping bolt 53 is provided with a clamping groove 55 matching the above-mentioned frustum-shaped fixed block 14 of the anti-theft bolt, and the other section is connected to the clamping rod 53 in rotation, and can follow the clamping rod 53 up and down. move. This special-purpose wrench cooperates and can open above-mentioned matching anti-theft bolt, can't open anti-theft bolt under the situation that the fixed block 14 of anti-theft bolt does not match with the clamping bolt 54 of wrench.

When installing and using this anti-theft bolt, as shown in Figure 2 and Figure 5, the nut 2 of the anti-theft bolt is screwed into the thread 56 of the clamping end 51 of the special wrench. Then rotate the clamping lever 53 to allow the clamping lever 53 to move to the side where the anti-theft bolt is housed. At this moment, the clamping bolt 54 also slides to the side where the anti-theft bolt is housed. The frustum-shaped fixing block 14 on the bolt coincides, and at this moment, the clamping bolt 54 has fixed the anti-theft bolt, and then the bolt body of the anti-theft bolt can be screwed into the object to be fixed by using a special wrench.

As shown in Figure 6, the fixture can be provided with a bolt groove 62 to accommodate the positioning piece 3 and the nut 2 of the anti-theft bolt exposed outside the fixture, and the width of the bolt groove 62 can accommodate the clamping end 51 of the special wrench inside it turn. When anti-theft bolt is fixed object, utilize special wrench that anti-theft bolt is pushed in the bolt groove 51, rotate special wrench to tighten anti-theft bolt, the upper strata fixture 61 with bolt groove 62 and the lower floor fixture 63 are fixed together. After the anti-theft bolt is fixed in place, as shown in Figure 5, turn the clamping lever 53 to allow the clamping lever 53 to drive the clamping bolt 54 away from the anti-theft bolt, and then turn the special wrench to disengage the nut 14 from the clamping end 51. The nut 14 in the bolt groove 62 is more difficult to be clamped by common pliers, so just played the effect of putting the thief.

Embodiment 2: As shown in FIG. 3 , the structure of this embodiment is basically the same as that of Embodiment 1, the difference is that the top of the nut 2 of the anti-theft bolt is provided with a clamping groove 24 . As shown in FIG. 7 , the clamping bolt 54 of the special wrench is provided with a clamping block 75 matching the fixing groove 24 . The benefit of such design is that the fixing groove 24 on the nut 2 is difficult to be clamped by common pliers, and the anti-theft performance of the increased anti-theft bolt.

Embodiment 3: As shown in Fig. 1 and Fig. 4 , the anti-theft bolt structure of this embodiment is basically the same as that of Embodiment 1, the difference between them is that the positioning piece 3 and the nut 2 are integrated. As shown in FIG. 4 , the diameter of the nut 2 is larger than that of the bolt body 1 during production, and the protruding part of the nut 2 can be used for positioning. This design can be integrally formed during production, the structure is simplified, and the production process is saved, thereby reducing costs, having stronger structural stability and long service life.

Claims (5)

1. an anti-theft bolt comprises key and nut, it is characterized in that described nut is cylindrical body and is provided with the screw thread identical with the key hand of spiral, and the upper end is provided with fixed block or fixed groove; Be provided with location piece between nut and the key.

2. anti-theft bolt according to claim 1 is characterized in that fixed block or fixed groove are spherical, cone shape, taper type or frustoconic shape.

3. anti-theft bolt according to claim 2 is characterized in that fixed block or fixed groove are provided with frictional groove.

4. anti-theft bolt according to claim 3 is characterized in that the location piece shape is circular.

5. special spanner that is used for above-mentioned anti-theft bolt, form by pinching end and handle, it is characterized in that the spanner pinching end is a tubulose, the two ends inwall is provided with screw thread, wherein the nut of the screw thread of an end and above-mentioned bolt is complementary, and the screw-thread fit that the other end is provided with threaded clamp lever and this end flexibly connects; Be provided with clamping bolt in the pinching end and be slidingly connected with it, clamping bolt one end is provided with clamping slot or the clamp that is complementary with above-mentioned bolt piece or fixed groove, and the other end and clamp lever are rotationally connected.

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