CN205117944U

CN205117944U - Pitch arc ripes locking countersunk screw

Info

Publication number: CN205117944U
Application number: CN201520861947.1U
Authority: CN
Inventors: 韩造林
Original assignee: Beijing Sifang Automation Co Ltd
Current assignee: Beijing Sifang Automation Co Ltd
Priority date: 2015-11-02
Filing date: 2015-11-02
Publication date: 2016-03-30
Anticipated expiration: 2025-11-02

Abstract

The utility model provides a pitch arc ripes locking countersunk screw, shank of screw that includes the screwhead, is connected with the head, the screwhead is the countersunk head, and its head is a conical surface of 90 degrees, sets up the filiform protruding cusped edge of a plurality of arcs on the conical surface of screwhead. The utility model discloses a scratch locking countersunk screw and can scratch metal surface oxide layer or lacquer layer when tightening the screw, put certain degree of depth under, because the screw head conical surface adopts the pitch arc structure to the pitch arc direction twists opposite direction with the screw, makes it can prevent screw loose through this reverse pitch arc structure like this in adverse circumstances such as vibrations transportation.

Description

Camber line scratches locking sunk screw

Technical field

The utility model belongs to technical field of fastening, is specifically related to a kind of camber line and scratches locking sunk screw.

Background technique

The head of common sunk screw is one 90 degree, the conical surface of smooth surface, needing the stationary applica-tions ensureing electric conductivity, oxide layer or the enamelled coating of surface of contact can not be scratched when tightening screw, due to oxide layer and enamelled coating non-conductive, can not ensure to conduct electricity switching performance, and common sunk screw head is owing to being smooth surface, there is no locking countersunk head function, be easy to generation when being given a shock and loosen.

Model utility content

The problem of conduction switching performance and locking countersunk head effect can not be ensured for solving common sunk screw in prior art, the utility model discloses a kind of camber line and scratching locking sunk screw.The utility model is concrete by the following technical solutions:

A kind of camber line scratches locking sunk screw, and the screw rod comprise screw head, being connected with head, is characterized in that:

Described screw head is countersunk head, and its head is the conical surface of 90 degree, and the conical surface of screw head arranges the protruding cusped edge of multiple arc shaped.

The utility model also preferably includes following scheme further:

The equilateral triangle that its face of protruding cusped edge of described arc shaped is 0.35mm by the length of side forms, it moves towards to adopt arc shaped structure, when the downward screw head of screw rod is on upper direction, camber line originates in screw head conical surface top edge, end at conical surface lower limb, camber line rotates 33.65 degree to the right, contrary with screw thread Hand of spiral, and arc length is 1.85mm.

Fluting on described screw head can be implemented as multiple mode of grooving, and the utility model is preferably " one " word groove or " ten " word groove.

The utility model can scratch oxidation on metal surface layer or enamelled coating when tightening screw, put certain depth under, owing to being adopt inverted arc line structure, make its in the rugged environment such as vibrations transport can by its contrary with screw fastening direction to camber line projection cusped edge structure prevent loosened screw.

The utility model has following useful technique effect:

Camber line disclosed in the utility model scratches locking sunk screw can scratch oxidation on metal surface layer or enamelled coating, provides good conduction switching performance, and reverse protruding cusped edge can also produce reaction force in screw loosening direction simultaneously, effectively prevents screw loosening.

Accompanying drawing explanation

Fig. 1 is that the utility model camber line scratches locking sunk screw;

Fig. 2 is that camber line scratches locking sunk screw head schematic diagram;

Fig. 3 is that camber line scratches the protruding cusped edge schematic diagram of locking sunk screw;

Fig. 4 is that camber line scratches locking sunk screw screw rod schematic diagram;

Fig. 5 is that camber line scratches locking sunk screw screw head sloting schematic diagram.

Wherein, the implication of reference character is as follows: 1 scratches locking sunk screw for camber line, and 2 is screw head, and 3 is protruding cusped edge, and 4 is screw rod, and 5 is the fluting on screw head.

Embodiment

Be described in further detail below in conjunction with the technological scheme of Figure of description to the application.

Be illustrated in figure 1 the utility model camber line and scratch locking sunk screw 1, comprise screw head 2, the protruding cusped edge 3 of arc shaped, screw rod 4 forms, and screw head 2 is countersunk head, and the protruding cusped edge 3 of arc shaped, from screw head conical surface top edge, extends to conical surface root.

Being illustrated in figure 2 the schematic diagram that the utility model camber line scratches the screw head 2 of locking sunk screw 1, is 90 ° of conical surfaces, countersunk head structure.

Be illustrated in figure 3 protruding cusped edge 3 schematic diagram that the utility model camber line scratches locking sunk screw 1, protruding point, the equilateral triangle that 3 its faces are 0.35mm by the length of side forms, it moves towards to adopt arc shaped structure, and when screw head 2 is on upper direction downwards for screw rod 4, camber line originates in screw head 2 conical surface top edge, end at conical surface lower limb, camber line rotates 33.65 degree to the right, contrary with screw thread Hand of spiral, and arc length is 1.85mm.

Be illustrated in figure 4 screw rod 4 schematic diagram that the utility model camber line scratches locking sunk screw 1, the length of screw rod 4, thread, pitch, can make according to GB, also can customize according to the actual requirements.

Be illustrated in figure 5 screw head 4 that the utility model camber line scratches locking sunk screw 1 to slot schematic diagram, the fluting 5 on described screw head 4 can be implemented as multiple mode of grooving, and the preferred screw head of the utility model is " ten " word groove.

When the fastening component of needs, be screwed into wherein by this screw, the protruding cusped edge 3 of arc shaped can scratch oxidation on metal surface layer or enamelled coating.Ensure good conduction switching performance.The protruding cusped edge 3 of simultaneously reverse camber line, when loosened screw, can produce reverse active force in loosening direction, prevent screw loosening.

Claims

1. camber line scratches a locking sunk screw, and the screw rod comprise screw head, being connected with head, is characterized in that:

2. camber line according to claim 1 scratches locking sunk screw, it is characterized in that:

The equilateral triangle that its face of protruding cusped edge of described arc shaped is 0.35mm by the length of side forms, it moves towards to adopt arc shaped structure, when the downward screw head of screw rod direction upwards, camber line originates in screw head conical surface top edge, end at conical surface lower limb, camber line rotates 33.65 degree to the right, contrary with screw thread Hand of spiral, and arc length is 1.85mm.

3. screw head according to claim 1, is characterized in that:

Fluting on described screw head is " one " word groove or " ten " word groove.