CN207583792U - High stability screw - Google Patents

Abstract

The utility model is related to hardware fields, and in particular to a kind of high stability screw, including screw rod, the head that is connected to screw tip, be opened in head surface go deep into inside head for being inserted into the binding groove of fastening tool；The binding groove is in M shape, including cross recess and four triangular grooves for being set to four right angles of cross recess；The screw rod outer surface is equipped with screw thread, and the thread cross-section is the triangle surrounded by three arc sidelines.The utility model high mechanical strength, it is not easy to break, be unlikely to deform, can be stably connected with workpiece.

Description

High stability screw

Technical field

The utility model is related to hardware field, more particularly to high stability screw.

Background technology

Screw, be using object inclined-plane circular rotating and frictional force physics and mathematical principle, by easy stages tightly Gu the tool of implements parts is most common fastener, is widely used in all trades and professions.Screw head and screw rod are generally comprised, And mostly metal material is made.

Screw generally comprises screw rod, head and fastening part, and screw rod is connected to head, and fastening part is opened in head.It is but existing With the presence of the following shortcoming of screw of technology.On the one hand, the joint face of screw thread and workpiece is quadrangle, when workpiece motion s, Screw shakes, and since screw is low with workpiece bonding strength, easily causes screw and skids off, and installation is unstable.Second aspect, fastening part are Cross recess, mechanical strength is low, and stability is poor, has been deformed upon during use, has caused fastening tool that can not coincide with fastening part, Screw is difficult to screw in, inconvenient to use.

Utility model content

To solve the above problems, the utility model provide a kind of high mechanical strength, it is not easy to break, be unlikely to deform, can and work The high stability screw that part is stably connected with.

Technical solution is used by the utility model：High stability screw including screw rod, is connected to the head of screw tip Portion, be opened in head surface go deep into inside head for being inserted into the binding groove of fastening tool；The binding groove is in M shape, is wrapped It includes cross recess and is set to four triangular grooves of four right angles of cross recess；The screw rod outer surface is equipped with screw thread, the screw thread Cross section is the triangle surrounded by three arc sidelines.

To being further improved as the thread form angle of the screw thread is 50 °~60 °, and the depth of thread is for above-mentioned technical proposal 1.5mm-2mm, screw pitch 3.0mm-6.0mm.

To being further improved as, the circular in cross-section on the head for above-mentioned technical proposal, and the diameter on head is from carrying on the back The side of a lateral connecting screw from screw rod is gradually reduced.

To being further improved as the screw rod is integrally formed with head, is included from inside to outside not for above-mentioned technical proposal Rust steel ontology, the electroplated layer through strengthening heat-treating profiled hardened layer in stainless steel body surface, being plated on hardening layer surface.

The beneficial effects of the utility model are：

1st, on the one hand, relative to traditional cross recess, the utility model has opened up four in four right angles of cross recess Triangular groove, due to cross recess bad mechanical strength, in fastener cycle, the fastening style of work generates stress in cross recess, Yi Zao It deforms upon and cannot be combined with fastening tool well into cross recess, after increasing triangular groove, triangular groove has shared fastening tool To the active force of cross recess, prevent cross recess from deforming upon, it is ensured that fastening tool can coincide with cross recess, so as to which screw be revolved Enter, improve the stability of screw.Second aspect, screw rod outer surface are equipped with screw thread, and the thread cross-section is by three arcs The triangle that sideline surrounds, the thread form angle of the screw thread is 50 °~60 °, and the design of this structure leans on three points to work piece Tapping thread is carried out, and there are one fuel factors for meeting during locking, and can be played after cooling prevents screw from walking, from And formed and be stably connected with, improve the stability of screw.

2nd, the thread form angle of screw thread be 50 °~60 °, preferably 55 °, preferably depth of thread 1.5mm-2mm, 1.8mm, spiral shell Away from for 3.0mm-6.0mm, preferably 4.5mm, this angle screw strength is high and reduces tapping screw in the process locked The area of cut and radial load, so as to reduce when installing tapping screw to the destructive power of mounting hole, further reduce clast The possibility for blocking mounting hole and mounting hole being caused to crack is screwed into torque and high locking property with low, further improves spiral shell The stability of nail.Relative to the screw of the prior art, in the utility model, ridge angle is small, and the depth of thread is big, and screw pitch is big, spiral shell It is high to follow closely overall stability, high mechanical strength so that screw is not easy to break during screw-in, further increases the utility model Mechanical strength, and the chip generated during self tapping can be stored in thread groove, easy to use.

3rd, the circular in cross-section on head, and the diameter on head is gradual from the side of the lateral connecting screw away from screw rod Reduce, head while fastening screw for playing position-limiting action, when due to movement occasion, prevent screw due to vibrations and Loosening skids off, it is ensured that screw is stably connected in workpiece, further improves the stability of the utility model.

4th, screw rod and head are integrally formed, and include stainless steel ontology, heat-treating profiled in stainless through strengthening from inside to outside The hardened layer of steel body surface, the electroplated layer for being plated on hardening layer surface, equipped with hardened layer, increase the mechanical strength of screw, Screw is prevented to be broken in use, electroplating surface has electroplated layer, prevents screw corrosion, further improves screw Stability.

Description of the drawings

Fig. 1 is the front view of the utility model；

Fig. 2 is the vertical view of the utility model；

Fig. 3 is the bottom view of the utility model；

Fig. 4 is the cross-sectional view on the head of the utility model.

Specific embodiment

The utility model is further described below in conjunction with attached drawing.

As shown in Figs 1-4, the respectively front view of the utility model, vertical view, bottom view and the signal of the cross section on head Figure.

High stability screw 100 including screw rod 110, the head 120 that is connected to 110 top of screw rod, is opened in head 120 The binding groove 130 for being used to be inserted into fastening tool inside head 120 is goed deep on surface；The binding groove 130 is in M shape, including ten Word slot 131 and four triangular grooves 132 for being set to 131 4 right angles of cross recess；110 outer surface of screw rod is equipped with screw thread 111,111 cross section of screw thread is the triangle surrounded by three arc sidelines.

The thread form angle of screw thread 111 is 50 °~60 °, and preferably 55 °, 111 depth of screw thread is 1.5mm-2mm, preferably 1.8mm, preferably screw pitch 3.0mm-6.0mm, 4.5mm, this 111 intensity of angle screw thread is high and reduces in the process locked The area of cut and radial load of tapping screw 100, so as to reducing the destruction when installing tapping screw 100 to mounting hole Power, further reduces the possibility that clast blocks mounting hole and mounting hole is caused to crack, and torque and high locking property are screwed into low Energy further improves the stability of screw 100.Relative to the screw 100 of the prior art, in the utility model, 111 tooth of screw thread Angle is small, and 111 depth of screw thread is big, and screw pitch is big, and 100 overall stability of screw is high, high mechanical strength so that screw 100 was screwing in It is not easy to break in journey, the mechanical strength of the utility model is further increased, and the chip generated during self tapping can be stored in screw thread It is easy to use in 111 slots.

The circular in cross-section on head 120, and the diameter on head 120 deviates from a lateral connecting screw 110 of screw rod 110 certainly Side be gradually reduced, head 120 when due to movement occasion, is prevented for playing position-limiting action while fastening screw 110 Only screw 100 is loosened due to vibrations skids off, it is ensured that screw 100 is stably connected in workpiece, further improves the utility model Stability.

Screw rod 110 is integrally formed with head 120, from inside to outside include stainless steel ontology 121, through strengthen it is heat-treating profiled Hardened layer 122 in 121 surface of stainless steel ontology, the electroplated layer 123 for being plated on 122 surface of hardened layer, equipped with hardened layer 122, The mechanical strength of screw 100 is increased, screw 100 is prevented to be broken in use, electroplating surface has electroplated layer 123, prevents 100 corrosion of screw further improves the stability of screw 100.

On the one hand, relative to traditional cross recess 131, the utility model is opened up in four right angles of cross recess 131 Four triangular grooves 132, due to 131 bad mechanical strength of cross recess, in fastener cycle, the fastening style of work in cross recess 131 and Stress is generated, cross recess 131 is easily caused and deforms upon and cannot be combined well with fastening tool, after increasing triangular groove 132, three Chamfered groove 132 has shared active force of the fastening tool to cross recess 131, prevents cross recess 131 from deforming upon, it is ensured that fastening tool energy It coincide with cross recess 131, so as to which screw 100 be screwed in, improves the stability of screw 100.Second aspect, 110 appearance of screw rod Face is equipped with screw thread 111, and 111 cross section of screw thread is the triangle surrounded by three arc sidelines, the tooth form of the screw thread 111 Angle is 50 °~60 °, and the design of this structure carries out tapping thread 111, and in the process locked by three points to work piece There are one fuel factors for middle meeting, and can be played after cooling prevents screw 100 from walking, and is stably connected with so as to be formed, improves screw 100 Stability.

The manufacturing method of the screw 100 of the utility model is：

First, bar section of stainless steel is taken to be integrally formed screw rod 110 and head 120, then fastening part is opened up on head 120, then Screw thread 111 is opened up on screw rod 110, then cure process is carried out to screw 100 and obtains hardened layer 122, finally to the spiral shell after hardening Nail 100 carries out plating and forms electroplated layer 123 to obtain the high stability screw 100 of the utility model.

Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed, But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims (4)

1. high stability screw, it is characterised in that：Including screw rod, the head that is connected to screw tip, it is opened in head surface depth Enter the binding groove for being used to be inserted into fastening tool inside head；The binding groove is in M shape, including cross recess and is set to ten Four triangular grooves of four right angles of word slot；The screw rod outer surface is equipped with screw thread, and the thread cross-section is by three arcs The triangle that sideline surrounds.

2. high stability screw according to claim 1, it is characterised in that：The thread form angle of the screw thread is 50 °~60 °, The depth of thread is 1.5mm-2mm, screw pitch 3.0mm-6.0mm.

3. high stability screw according to claim 2, it is characterised in that：The circular in cross-section on the head, and head The diameter in portion is gradually reduced from the side of the lateral connecting screw away from screw rod.

4. high stability screw according to claim 3, it is characterised in that：The screw rod and head are integrally formed, from interior Include stainless steel ontology, through strengthening heat-treating profiled hardened layer in stainless steel body surface, being plated on hardened layer table to outer The electroplated layer in face.