CN209483782U - A kind of self tapping Antiskid screw - Google Patents

Abstract

A kind of self tapping Antiskid screw, comprising: pedestal, screw rod and thread, the upper end of screw rod and the lower end of pedestal form fixation, thread is extended spirally around the side wall of screw rod, the screw pitch of thread is gradually reduced from pedestal, and the outside of thread has blade, and the fillet of blade is gradually increased from the pedestal.Above-mentioned self tapping Antiskid screw can not only play the role of effective anti-skidding, the case where avoiding sliding teeth, but also the resistance that can prevent self tapping Antiskid screw from receiving increases, and guarantees the fluency of lock screw.

Description

A kind of self tapping Antiskid screw

Technical field

The utility model relates to screw fields, more particularly, to a kind of self tapping Antiskid screw.

Background technique

Self-tapping screw generally refers to tip, coarse thread, the harder wood screw of quality, also there is aluminium alloy, plastics.Self tapping Screw is used for nonmetallic or softer metal, does not have to bottoming hole and tapping, self-tapping screw is tip.

Chinese patent CN204729435U discloses a kind of self tapping Antiskid screw, including screw rod, the inner hollow of screw rod, spiral shell The outside of bar is covered with thread along spiro rod length direction, and one end of screw rod has a cross recess, and the other end of screw rod is flush end or tapered end, The screw pitch of thread is unequal.The self tapping Antiskid screw can well be fixed rubber or wood-based product, the spiral shell of Unequal distance Tooth make fixed component will not sliding teeth, it is simple and practical.

Although also will increase the resistance of screw rotation simultaneously however, the thread of Unequal distance can be gradually increased coupling mechanism force Power.This is because thread distance becomes larger, the same circle number of screw rotation is caused but to shoot longer distance, above situation is easy Screw is caused to can not be successfully the problem of shooting scheduled position and causing fixed failure.

Utility model content

It is anti-skidding to provide a kind of self tapping for above situation to solve the above-mentioned problems for technical solutions of the utility model Screw, the self tapping Antiskid screw include: pedestal, screw rod and thread, and the upper end of shown screw rod and the lower end of the pedestal are formed Fixed, the thread is extended spirally around the side wall of the screw rod, and the screw pitch of the thread is gradually reduced from the pedestal, institute The outside for stating thread has blade, and the fillet of the blade is gradually increased from the pedestal.

Further, there are two blade, respectively upper knife edge and lower blade, the upper knife edge is cut the thread tool with described Sword is parallel to each other, and the fillet of the upper knife edge is gradually increased from the pedestal, and the fillet of the lower blade is constant.

Further, the pedestal has main body, and the main body is in cylindrical shape, and the upper surface recess of the main body has lock Slot.

Further, the locked groove is hex slot.

Further, the side wall of the main body is surrounded with evagination ring, and the outer bulge loop is located at close to the body upper surface Position.

Further, the lower surface protrusion of the main body has multiple anti-skid chequers.

Further, multiple anti-skid chequers are arranged around the mode of the screw rod circumferentially array.

Further, the screw rod has interconnecting piece and tail portion, and the interconnecting piece is in cylindrical shape, and the tail portion is in cone The lower end of shape, the upper end of the interconnecting piece and the pedestal forms fixation, and the lower end of the interconnecting piece and the tail portion form solid Fixed, the thread is extended spirally around the side wall of the interconnecting piece.

After adopting the above technical scheme, the effect of the utility model is: the self tapping Antiskid screw with above structure is not only It can play the role of effective anti-skidding, the case where avoiding sliding teeth, but also the resistance that can prevent self tapping Antiskid screw from receiving increases Greatly, guarantee the fluency of lock screw.

Detailed description of the invention

Fig. 1 is the schematic diagram for the self tapping Antiskid screw that the utility model embodiment one is related to；

Fig. 2 is the sectional view for the self tapping Antiskid screw that the utility model embodiment one is related to；

Fig. 3 is the sectional view for the self tapping Antiskid screw that the utility model embodiment two is related to.

Specific embodiment

Technical solutions of the utility model are further described below by embodiment:

[embodiment one]

The utility model provides a kind of self tapping Antiskid screw, as shown in Figure 1, self tapping Antiskid screw includes: pedestal 1, screw rod 2 With thread 3, the upper end of screw rod 2 and the lower end of pedestal 1 form fixation, and thread 3 is extended spirally around the side wall of screw rod 2.In self tapping In Antiskid screw use process, pedestal 1 is used to engage with lock screw tool, and screw rod 2 is for being inserted into object to be fixed, thread 3 form internal screw thread in object, and engage with internal screw thread.

As shown in Fig. 2, pedestal 1 has main body 11, main body 11 is in cylindrical shape.The upper surface recess of main body 11 has locked groove 12, locked groove 12 is used to engage with lock screw tool.In the present embodiment, locked groove 12 is hex slot, in other embodiments, lock Slot 12 or cross recess or triangular groove.The side wall of main body 11 is surrounded with evagination ring 13, and outer bulge loop 13 is located at close to main body 11 The position of upper surface, outer bulge loop 13 can be convenient user and hold self tapping Antiskid screw and adjust the direction of self tapping Antiskid screw. The phenomenon that lower surface protrusion of main body 11 has multiple anti-skid chequers 14, and anti-skid chequer 14 can prevent self tapping Antiskid screw from having skidded, And user need not install improved mat, save cost.In the present embodiment, multiple anti-skid chequers 14 surround the circumferentially battle array of screw rod 2 The mode of column arranges.

Screw rod 2 has interconnecting piece 21 and tail portion 22, and interconnecting piece 21 is in cylindrical shape, and tail portion 22 is tapered.Interconnecting piece 21 Upper end and the lower end of pedestal 1 form fixation, the lower end and tail portion 22 of interconnecting piece 21, which are formed, to be fixed, and thread 3 is around interconnecting piece 21 Side wall extend spirally.The tail portion 22 of taper can make screw rod 2 be easier to be inserted into object.

The screw pitch D of thread 3 is gradually reduced from pedestal 1, and the outside of thread 3 has a blade, and the fillet θ of blade is from pedestal 1 It rises and is gradually increased.When pedestal 1 is closer to object, screw pitch D is bigger, between thread 3 and object to engage dynamics bigger, to play Effective anti-skidding effect.When pedestal 1 is closer to object, the fillet θ of blade is smaller, i.e., blade is sharper, to be effectively prevented The resistance of self tapping increases.

As it can be seen that it is effective anti-skidding that there is the self tapping Antiskid screw of above structure can not only play the role of, sliding teeth is avoided Situation, but also the resistance that can prevent self tapping Antiskid screw from receiving increases, and guarantees the fluency of lock screw.

[embodiment two]

As shown in figure 3, in the present embodiment, the structure of self tapping Antiskid screw is roughly the same with embodiment one, institute is different , there are two blade, respectively upper knife edge 31 and lower blade 32, upper knife edge 31 is parallel to each other the tool of thread 3 with lower blade 32, on The fillet θ of blade 31 is gradually increased from pedestal 1, and the fillet θ of lower blade 32 is constant.This set can be with the pressure resistance of thread 3 Degree, avoids upper knife edge 31 from being broken off during self tapping.

It is emphasized that term " first ", " second ", " third " in the utility model are used for description purposes only, and It cannot be understood as indicating or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.It defines as a result, " first ", " second ", " third " feature can explicitly or implicitly include at least one of the features.Description of the invention In, the meaning of " plurality " is at least two, such as two, three etc., unless otherwise specifically defined.The utility model is real The directional instruction (such as up, down, left, right, before and after ...) of institute in example is applied to be only used for explaining each portion under a certain particular pose Relative positional relationship, motion conditions between part etc., if the particular pose changes, directionality instruction is also corresponding Ground changes correspondingly.

Embodiment described above, only the preferred embodiments of the utility model, are not the implementation model to limit the utility model It encloses, therefore all equivalent change or modifications done according to structure, feature and principle described in present utility model application the scope of the patents, it should all It is included in the scope of the utility model patent application.

Claims (8)

1. a kind of self tapping Antiskid screw, the self tapping Antiskid screw includes: pedestal, screw rod and thread, the upper end of shown screw rod with The lower end of the pedestal forms fixation, and the thread is extended spirally around the side wall of the screw rod, it is characterised in that: the thread Screw pitch be gradually reduced from the pedestal, the outside of the thread has blade, and the fillet of the blade is from the pedestal It is gradually increased.

2. self tapping Antiskid screw according to claim 1, it is characterised in that: there are two blades for the thread tool, respectively Upper knife edge and lower blade, the upper knife edge are parallel to each other with the lower blade, the fillet of the upper knife edge from the pedestal by Cumulative big, the fillet of the lower blade is constant.

3. self tapping Antiskid screw according to claim 1, it is characterised in that: the pedestal has main body, and the main body is in The upper surface recess of cylindrical shape, the main body has locked groove.

4. self tapping Antiskid screw according to claim 3, it is characterised in that: the locked groove is hex slot.

5. self tapping Antiskid screw according to claim 3, it is characterised in that: the side wall of the main body is surrounded with evagination ring, The outer bulge loop is located at close to the position of the body upper surface.

6. self tapping Antiskid screw according to claim 3, it is characterised in that: the lower surface protrusion of the main body has multiple anti- Sliding line.

7. self tapping Antiskid screw according to claim 6, it is characterised in that: multiple anti-skid chequers surround the screw rod circumferentially The mode of array arranges.

8. self tapping Antiskid screw according to claim 1, it is characterised in that: the screw rod has interconnecting piece and tail portion, institute Interconnecting piece is stated in cylindrical shape, the tail portion is tapered, and the lower end of the upper end of the interconnecting piece and the pedestal forms fixation, The lower end of the interconnecting piece and the tail portion form fixation, and the thread is extended spirally around the side wall of the interconnecting piece.