CN201696432U

CN201696432U - Anti-disassembly bolt

Info

Publication number: CN201696432U
Application number: CN2010201210606U
Authority: CN
Inventors: 卢军
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-02-26
Filing date: 2010-02-26
Publication date: 2011-01-05
Anticipated expiration: 2020-02-26

Abstract

The utility model discloses an anti-disassembly bolt, comprising a screw (1) and a nut (4), wherein the screw (1) is provided with at least one axial groove (2); the inner side of the nut (4) is provided with at least one axial groove (3); the groove (3) on the thread surface at the inner side of the nut (4) is internally provided with an elastic piece (5); the width of the elastic piece (5) is larger than the depth of the groove (3); and the length of the elastic piece (5) is less than or equal to that of the groove (3). In the utility model, the screw and the nut of the bolt are respectively provided with the groove, the groove of the nut is provided with the elastic piece, so that the bolt is very convenient to fasten when using the common means and tools, and is very difficult to disassemble when using the common means and tools, the time for disassembling the bolt can be greatly prolonged, the disassembling difficulty is increased, and abnormal disassembly can be prevented when the anti-disassembly bolt is used at places which are not often disassembled and equipment easy to lose; in addition, the anti-disassembly bolt has the advantages of simple structure, convenient use and low cost.

Description

Anti-demounting bolt

Technical field:

The utility model relates to a kind of bolt, especially a kind of anti-demounting bolt.

Background technique:

The installation of present various device, equipment, fastening or connect in used bolt generally form by screw rod and nut, be to use very general member, but present bolt is easy to use general purpose tool to dismantle, therefore cause a lot of facilities or use that bolt is installed, the fastening or member that connects or because of natural loose or dislocation or suffer the dismounting on artificial improper ground so that damage or lose that the situation that public or private property is suffered a loss happens occasionally.And some special occasions mainly take the dead or mode such as rivet of weldering install, fastening or connect, mounting process is complicated also to need special tool, uses very inconvenient.

Summary of the invention:

Technical problem to be solved in the utility model provides a kind of simple in structure, easy to use, with low cost, is difficult to the anti-demounting bolt by means commonly used and instrument dismounting after installing and using.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: comprise screw rod (1) and nut (4), the flank of thread of described screw rod (1) is provided with at least one axial groove (2), the inboard flank of thread of described nut (4) is provided with at least one axial groove (3), be provided with shell fragment (5) in the groove (3) on the flank of thread of nut (4) inboard, and the degree of depth of the width＞groove (3) of shell fragment (5), the length of the length≤groove (3) of shell fragment (5).

As improved technological scheme, the cross section of the groove (2) on the flank of thread of above-mentioned screw rod (1) is preferably triangle, and face and screw rod (1) opposite with the fastening direction of nut (4) in described leg-of-mutton two inclined-planes are selected the angle α of tangent plane≤90 degree mutually at this, be preferably 80～90 degree, the cross section of the groove (3) on the flank of thread of described nut (4) inboard also is preferably triangle, and face and nut (4) identical with the fastening direction of nut (4) in described leg-of-mutton two inclined-planes are spent in these angle β≤90 of selecting the phase tangent plane, are preferably 80～90 degree.

Groove (3) is a through slot on the flank of thread of above-mentioned nut (4) inboard, also can be non-through slot.

Described shell fragment (5) bottom best and the last groove (3) of nut (4) links together, and the other end is a free end.

The utility model is by being equipped with groove on the screw rod of bolt and nut, and in the groove of nut, be provided with shell fragment, make bolt very convenient when using means commonly used and instrument fastening, then very difficult when using the dismounting of means commonly used and instrument, can prolong the time of Bolt dismantling greatly, increased dismounting difficulty, used at some and often can not prevent unusual dismounting on places of dismounting and the equipment easily lost, and have advantage simple in structure, easy to use, with low cost.

Description of drawings:

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the utility model embodiment 1 a structural representation.

Fig. 2 is the sectional structure schematic representation of Fig. 1 along A-A.

The structural representation of Fig. 3 when shell fragment deforms during for the rotation of the nut of Fig. 1.

Fig. 4 is the utility model embodiment 2 a structural representation.

Fig. 5 is the utility model embodiment 3 a structural representation.

Fig. 6 is the utility model embodiment 4 a structural representation.

Fig. 7 is the utility model embodiment 5 a structural representation.

Fig. 8 is the utility model embodiment 6 a structural representation.

Fig. 9 is the utility model embodiment 7 a structural representation.

Figure 10 is the utility model embodiment 8 a structural representation.

Shown in the figure: 1 is screw rod, and 2 is the groove on the screw rod, and 3 is the groove on the nut, and 4 is nut, and 5 is shell fragment.

Embodiment:

Embodiment 1:

With reference to Fig. 1-3, structural representation for the utility model embodiment 1, comprise screw rod 1 and nut 4, be provided with two vee gutters 2 of axial symmetry in the both sides of screw rod 1, accordingly also be provided with two axial grooves 3 in the both sides of nut 4 madial walls, the groove 3 of nut 4 inboards is a through slot, face and screw rod 1 opposite with nut 4 fastening directions in two inclined-planes of the groove 2 on the screw rod 1 are selected the angle α of tangent plane≤90 degree mutually at this, face and nut 4 identical with nut 4 fastening directions in two inclined-planes of the groove 3 on the flank of thread of nut 4 inboards are selected angle β≤90 degree of phase tangent plane at this, the cross section of the groove 3 on nut 4 flank of thread also is a triangle, and face and the nut 4 identical with nut 4 fastening directions selected angle β≤90 degree of phase tangent plane at this in described two leg-of-mutton inclined-planes, be provided with shell fragment 5 in nut 4 inner side slots 3, one end of shell fragment 5 and the bottom of groove 3 are welded together, the other end is a free end, the width of shell fragment 5 is greater than the degree of depth of groove 3, the length of shell fragment 5 is with the length of nut 4 inside grooves 3, when nut 4 is installed, adjust nut 4 towards, make groove 3 in groove 2 and the nut 4 on the screw rod 1 towards opposite, with 3 pairs of grooves in the groove on the screw rod 12 and the nut 4 together, this moment, shell fragment 5 snapped onto in the groove 2 on the screw rod 1, swivel nut 4, as shown in Figure 3, resiliently deformable takes place in shell fragment 5 under the stopping of the hypotenuse of the groove on the screw rod 12, shell fragment 5 is pressed into the hypotenuse place of the groove 3 in the nut 4, this moment, shell fragment 5 did not hinder the precession of nut 4, nut can be screwed smoothly, when oppositely unscrewing nut 4, shell fragment 5 is subjected to the stopping of groove 3 straight flanges in groove 2 and the nut 4 on the screw rod 1, make shell fragment 5 be embedded into the inside of the groove 2 on the screw rod 1, nut can't be unloaded with spanner, can only adopt the mode of destruction to dismantle, prolong the take-down time greatly, also increased the difficulty of dismounting.

Embodiment 2:

With reference to Fig. 4, be the utility model embodiment 2 structural representation, compare with embodiment 1, embodiment 2 the main distinction is: the groove 3 in the described nut 4 is non-through slot, after nut 4 screwed, dismounting person can't see shell fragment 5, had more increased the difficulty of dismounting.

Embodiment 3:

With reference to Fig. 5, structural representation for the utility model embodiment 3, compare with embodiment 1, embodiment 3 the main distinction is: be symmetrical arranged four vee gutters 2 on screw rod 1, corresponding with it also is provided with shell fragment 5 in the inboard of nut 4 has been symmetrical arranged four grooves 3 and nut 4 inner side slots 3.

Embodiment 4:

With reference to Fig. 6, structural representation for the utility model embodiment 4, compare with embodiment 1, embodiment 4 the main distinction is: be provided with three vee gutters 2 on screw rod 1, corresponding with it also is provided with shell fragment 5 in the inboard of nut 4 is provided with three grooves 3 and nut 4 inner side slots 3.

Embodiment 5:

With reference to Fig. 7, structural representation for the utility model embodiment 5, compare with embodiment 1, embodiment 5 the main distinction is: on screw rod 1 symmetry be provided with two vee gutters 2, be equipped with shell fragment 5 being provided with in four vee gutters 3 and nut 4 inner side slots 3 of inboard symmetry of nut 4.

Embodiment 6:

With reference to Fig. 8, structural representation for the utility model embodiment 6, compare with embodiment 1, embodiment 6 the main distinction is: on screw rod 1 symmetry be provided with four vee gutters 2, be provided with shell fragment 5 being provided with in two vee gutters 3 and nut 4 inner side slots 3 of inboard symmetry of nut 4.

Embodiment 7:

With reference to Fig. 9, be the utility model embodiment 7 structural representation, embodiment 1 compares, and the main distinction of present embodiment is: be symmetrical arranged four rectangle grooves 2 on screw rod 1, at two vee gutters 3 that are provided with of the inboard of nut 4 symmetry.

Embodiment 8:

With reference to Figure 10, be the utility model embodiment 8 structural representation, embodiment 1 compares, and the main distinction of present embodiment is: be symmetrical arranged four rectangle grooves 2 on screw rod 1, at two rectangle grooves 3 that are provided with of the inboard of nut 4 symmetry.

The situation of embodiment 3-8 is fit to embodiment 2 too.

Claims

1. anti-demounting bolt, comprise screw rod (1) and nut (4), it is characterized in that: the flank of thread of described screw rod (1) is provided with at least one axial groove (2), the inboard flank of thread of described nut (4) is provided with at least one axial groove (3), be provided with shell fragment (5) in the groove (3) on the flank of thread of nut (4) inboard, and the degree of depth of the width＞groove (3) of shell fragment (5), the length of the length≤groove (3) of shell fragment (5).

2. anti-demounting bolt according to claim 1, it is characterized in that: the cross section of the groove (2) on the flank of thread of described screw rod (1) is a triangle, and face and the screw rod (1) opposite with the fastening direction of nut (4) selected the angle α of tangent plane≤90 degree mutually at this in described leg-of-mutton two inclined-planes.

3. anti-demounting bolt according to claim 2 is characterized in that: face opposite with the fastening direction of nut (4) and screw rod (1) select mutually at this that angle α of tangent plane is 80～90 degree in described leg-of-mutton two inclined-planes.

4. anti-demounting bolt according to claim 1, it is characterized in that: the cross section of the groove (3) on the flank of thread of described nut (4) inboard is a triangle, and face and the nut (4) identical with the fastening direction of nut (4) selected angle β≤90 degree of phase tangent plane at this in described leg-of-mutton two inclined-planes.

5. anti-demounting bolt according to claim 4 is characterized in that: face and nut (4) identical with the fastening direction of nut (4) in described leg-of-mutton two inclined-planes are 80～90 degree at this angle β that selects the phase tangent plane.

6. according to claim 1,2,3,4 or 5 described anti-demounting bolts, it is characterized in that: groove (3) is a through slot on the flank of thread of described nut (4) inboard.

7. according to claim 1,2,3,4 or 5 described anti-demounting bolts, it is characterized in that: groove (3) is non-through slot on the flank of thread of described nut (4) inboard.

8. according to claim 1,2,3,4 or 5 described anti-demounting bolts, it is characterized in that: described shell fragment (5) links together with the bottom that nut (4) is gone up groove (3), and the other end is a free end.

9. anti-demounting bolt according to claim 6 is characterized in that: described shell fragment (5) links together with the bottom that nut (4) is gone up groove (3), and the other end is a free end.

10. anti-demounting bolt according to claim 7 is characterized in that: described shell fragment (5) links together with the bottom that nut (4) is gone up groove (3), and the other end is a free end.