CN216714946U

CN216714946U - Difficult cracked screw

Info

Publication number: CN216714946U
Application number: CN202122823659.5U
Authority: CN
Inventors: 董林; 刘维杰
Original assignee: Xinge Hardware Industry Kunshan Co ltd
Current assignee: Xinge Hardware Industry Kunshan Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-06-10
Anticipated expiration: 2031-11-17

Abstract

The utility model relates to the field of industrial spare and accessory parts, in particular to a screw which is not easy to break, comprising a screw rod; the screw head is arranged above the screw rod, a neck is arranged between the screw rod and the screw head, and a washer is sleeved on the outer part of the neck; the top end of the screw head is provided with a driving port; an anti-fracture assembly is arranged between the neck and the screw rod and comprises a chamfer opening, an R-shaped angle and an inner hole, the chamfer opening and the inner hole are both arranged inside the washer, and the chamfer opening is arranged at one end, far away from the screw head, of the chamfer opening; the R-shaped angle is arranged outside the neck, the height of the neck is greater than that of the washer, and the R-shaped angle is arranged between the lead screw and the washer; through preventing the fracture design, intensity under the multiplicable screw head for difficult folding between the metal under the screw neck, when reducing the attrition rate, can improve product life.

Description

Screw not easy to break

Technical Field

The utility model relates to the field of industrial spare and accessory parts, in particular to a screw not easy to break.

Background

The screw is mainly used for a part for tightening the threaded hole, and plays a role in fastening by connecting the screw with a part with a through hole.

The screw is indispensable industry necessity in the life, and applicable in more equipment has brought great convenience for people's life.

The inner hole of the Huasi in the existing screw is not chamfered, so that the strength under the head of the screw is weak, and the phenomenon of fracture is easily caused when the Huasi is folded with metal under the neck; therefore, a screw which is not easy to break is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

In order to make up for the defects of the prior art and solve the problem that the conventional screw is easy to break, the utility model provides a screw which is not easy to break.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model relates to a screw which is not easy to break, comprising a screw rod; the screw head is arranged above the screw rod, a neck is arranged between the screw rod and the screw head, and a washer is sleeved on the outer part of the neck; the top end of the screw head is provided with a driving port;

an anti-fracture assembly is arranged between the neck and the screw rod and comprises a chamfer opening, an R-shaped angle and an inner hole, the chamfer opening and the inner hole are both arranged inside the washer, and the chamfer opening is arranged at one end, far away from the screw head, of the chamfer opening; the R-shaped angle is arranged outside the neck, the height of the neck is larger than the height of the washer, the R-shaped angle is arranged between the lead screw and the washer, one end, far away from the neck, of the lead screw is provided with a guide head, the guide head is designed in an arc shape, and the strength under the screw head can be increased through the design of the anti-fracture assembly.

Preferably, the bottom end of the inner wall of the driving port is welded with a wear-resistant steel plate, and anti-skidding lines are arranged on the wear-resistant steel plate, so that the phenomenon of skidding easily generated in the rotating process is avoided.

Preferably, the outer surface of the screw head is provided with a protective layer for protecting the screw head.

Preferably, the inside reinforcement subassembly that is provided with of screw pole, it sets up inside the screw pole including preventing fault, central basic unit and expansion ring to consolidate the subassembly, prevent that fault and central basic unit from interior to exterior, be provided with the filling layer between fault and the central basic unit, the expansion ring sets up on the screw pole, the expansion ring surface is provided with parallel surface and the slant inner concave surface, through the design of consolidating the subassembly, can consolidate the pole department of screw.

Preferably, the corners of the parallel surfaces are designed in an arc shape, so that the use effect of the expansion ring is improved.

Preferably, the anti-breaking layer and the filling layer are wrapped outside the central base layer from inside to outside, so that the toughness of the screw rod in the rotating process is improved.

The utility model has the advantages that:

2. the inner hole of the washer is provided with the chamfer angle opening, the screw rod is axially close to the inside of the preset hole to rotate along the thread direction outside the screw rod, the chamfer angle opening is formed in the washer, the R angle under the head of the screw can be increased by increasing the inner hole chamfer angle of the washer, the R-shaped angle is arranged at the bearing part of the neck, the radian of the R-shaped angle is larger than that of the neck of the existing screw, the strength under the head of the screw can be increased through the anti-fracture design, the screw is not easy to fold between the lower part of the neck of the screw and metal, the loss rate is reduced, and meanwhile the service life of a product can be prolonged;

2. through rotating the lead screw to the inside back of device reservation hole, through be provided with the expansion ring between lead screw and neck, when the lead screw rotates to the inslot completely, after the lead screw is screwed up completely, because the external diameter of expansion ring is greater than the peripheral size of lead screw, because central basic unit forms by carbide with preventing the main being made of fault, it has hardness height, wear-resisting, performance such as intensity and toughness are better, through the design of consolidating the subassembly, when the lead screw rotates fixedly, can consolidate the pole department of screw, the hardness of screw direction department has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a perspective view of a first embodiment;

FIG. 2 is a schematic cross-sectional front view illustrating a structure of the first embodiment;

FIG. 3 is a partial structural view of a screw according to an embodiment;

FIG. 4 is an enlarged schematic view of a portion A of FIG. 2 according to an embodiment;

FIG. 5 is an enlarged schematic view of a portion B of FIG. 2 according to an embodiment;

fig. 6 is an enlarged schematic view of a structure at C in fig. 2 according to an embodiment.

In the figure: 1. a screw shaft; 101. preventing faults; 102. a filling layer; 103. a central base layer; 104. a guide head; 2. a screw head; 201. a drive port; 202. wear-resistant steel plates; 203. a protective layer; 3. a neck portion; 301. an R-shaped angle; 4. washer; 401. chamfering the corner opening; 402. an inner bore; 5. an expansion ring; 501. a parallel plane; 502. an oblique inner concave surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-6, a non-breakable screw includes a screw shaft 1; the screw head 2 is arranged above the screw rod 1, a neck 3 is arranged between the screw rod 1 and the screw head 2, and a washer 4 is sleeved outside the neck 3; the top end of the screw head 2 is provided with a driving port 201;

an anti-fracture assembly is arranged between the neck 3 and the lead screw 1 and comprises a chamfer port 401, an R-shaped angle 301 and an inner hole 402, the chamfer port 401 and the inner hole 402 are both arranged inside the washer 4, and the chamfer port 401 is arranged at one end, far away from the screw head 2, of the chamfer port 401; the R-shaped angle 301 is arranged outside the neck 3, the height of the neck 3 is greater than that of the washer 4, the R-shaped angle 301 is arranged between the lead screw 1 and the washer 4, one end, far away from the neck 3, of the lead screw 1 is provided with the guide head 104, and the guide head 104 is designed in an arc shape; when the screw is in operation, because the washer inner hole attached to a common screw is not chamfered, the inner hole of the washer 4 is provided with a chamfered opening 401, when the screw body is in use, the screw body consists of a screw rod 1, a screw head 2, a neck 3 and a washer 4, the screw thread direction outside the screw rod 1 is axially close to the inside of the preset hole to rotate, at the moment, the head guide head 104 of the screw rod 1 firstly enters the inside of the hole to guide the screw in the use process, after the screw is installed, the chamfered opening 401 is arranged in the washer 4, the lower-head R angle of the screw can be increased by increasing the inner hole chamfer of the washer 4, at the moment, the bearing part of the neck 3 is provided with the R-shaped angle 301, the radian of the R-shaped angle 301 is greater than that of the neck of the existing screw, the strength under-head is further increased by increasing the radian of the R-shaped angle 301, so that the part under-head and the metal are not easy to fold, so that the screw body is not easy to break from the neck, the loss rate is reduced, and the product quality can be improved.

The bottom end of the inner wall of the driving port 201 is welded with a wear-resistant steel plate 202, and anti-skid lines are arranged on the wear-resistant steel plate 202; during operation, inserting with the help of the instrument and establishing to drive mouthful 201 inside when driving the screw whole, at first can producing the contact with wear-resisting steel sheet 202 department, because be provided with anti-skidding line on the wear-resisting steel sheet 202, and then when carrying out the butt rotation with drive mouthful 201, the frictional force of multiplicable contact surface to avoid easily producing the phenomenon of skidding at the pivoted in-process.

A protective layer 203 is arranged on the outer surface of the screw head 2; during operation, through 2 surface covers at the screw head have inoxidizing coating 203, it is the top layer that is formed for raw and other materials preparation by the carbide steel, has the characteristics of difficult corruption, corrosion, through wrapping up screw head 2 to avoid producing the problem of corruption with the moisture in the air, causing screw head 2 department.

A reinforcing component is arranged inside the screw rod 1 and comprises an anti-fault layer 101, a central base layer 103 and an expansion ring 5, the anti-fault layer 101 and the central base layer 103 are arranged inside the screw rod 1 from inside to outside, a filling layer 102 is arranged between the anti-fault layer 101 and the central base layer 103, the expansion ring 5 is arranged on the screw rod 1, and the outer surface of the expansion ring 5 is provided with a parallel surface 501 and an inclined inward concave surface 502; when the screw fixing device works, after the screw rod 1 is rotated into the reserved hole of the device, the expansion ring 5 is arranged between the screw rod 1 and the neck 3, when the screw rod 1 is completely rotated into the groove, after the screw rod 1 is completely screwed, as the outer diameter of the expansion ring 5 is larger than the peripheral size of the screw rod 1, a larger positive pressure is formed at the peripheral position in the hole, so that a larger friction force is formed between a contact surface and the expansion ring 5, and a fixing effect is further achieved, the stabilizing effect of the screw after the screw is installed is further improved, as the central base layer 103 and the anti-breaking layer 101 are mainly made of hard alloy, the hard alloy material is made of hard compounds and bonding metal of refractory metal, the interlayer is made by a powder metallurgy process, has the performances of high hardness, wear resistance, better strength, better toughness and the like, and is arranged at the center of the screw rod 1, when the screw rod 1 is rotated and fixed, the rod part of the screw can be reinforced, and the hardness of the screw guide part is improved.

The corners of the parallel plane 501 are designed to be arc-shaped; during operation, through this design, easily rotate its inside back to the hole, form frictional force with the contact surface in the hole, improved the result of use of expansion ring 5.

The anti-fault layer 101 and the filling layer 102 are wrapped outside the central base layer 103 from inside to outside; during operation, through setting up in proper order in 1 insides of lead screw with anti-breaking layer 101 and filling layer 102, but the effort that lead screw 1 received at the rotation in-process to improve the toughness of lead screw department rotation in-process.

The working principle is that as the washer inner hole attached to a common screw is not chamfered, the inner hole of the washer 4 is provided with a chamfer opening 401, when the screw body is used, the screw body consists of a screw rod 1, a screw head 2, a neck 3 and a washer 4, the screw thread direction outside the screw rod 1 is axially close to the inside of a preset hole to rotate, at the moment, the head guide head 104 of the screw rod 1 firstly enters the hole to guide the screw in the using process, after the screw is installed, the chamfer opening 401 is arranged in the washer 4, the lower head R angle of the screw can be increased by increasing the inner hole chamfer of the washer 4, at the moment, the bearing part of the neck 3 is provided with the R-shaped angle 301, the radian of the R-shaped angle 301 is greater than that of the neck of the existing screw, the strength under head is further increased by increasing the radian of the R-shaped angle 301, so that the part under the screw neck and the metal are not easy to fold, so that the screw body is not easy to break from the neck part, and the loss rate is reduced;

after the screw rod 1 is rotated to the inside of the reserved hole of the device, the expansion ring 5 is arranged between the screw rod 1 and the neck 3, when the screw rod 1 is completely rotated to the groove, after the screw rod 1 is completely screwed, because the outer diameter of the expansion ring 5 is larger than the peripheral size of the screw rod 1, a larger positive pressure can be formed at the peripheral position inside the hole, so that a larger friction force is formed between a contact surface and the expansion ring 5, and a fixing effect is further achieved, the stabilizing effect of the screw after the screw is installed is further improved, because the central base layer 103 and the fracture-preventing layer 101 are mainly made of hard alloy, the hard alloy material is made of hard compounds and bonding metal of refractory metal, the interlayer is made by a powder metallurgy process, has the performances of high hardness, wear resistance, better strength and toughness, and the like, and is arranged at the center of the screw rod 1, when the screw rod 1 is rotated and fixed, the rod part of the screw can be reinforced, and the hardness of the screw guide part is improved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.

Claims

1. A screw that is difficult for fracture which characterized in that: comprises a lead screw (1); the screw head (2) is arranged above the screw rod (1), a neck (3) is arranged between the screw rod (1) and the screw head (2), and a washer (4) is sleeved outside the neck (3); the top end of the screw head (2) is provided with a driving port (201);

an anti-fracture assembly is arranged between the neck (3) and the screw rod (1), the anti-fracture assembly comprises a chamfer opening (401), an R-shaped angle (301) and an inner hole (402), the chamfer opening (401) and the inner hole (402) are both arranged inside the washer (4), and the chamfer opening (401) is arranged at one end, far away from the screw head (2), of the chamfer opening (401); r shape angle (301) set up in neck (3) outside, the height that highly is greater than china department (4) of neck (3), R shape angle (301) set up between lead screw (1) and china department (4), the one end that neck (3) were kept away from in lead screw (1) is provided with guide head (104), and guide head (104) are the arc design.

2. A non-breakable screw according to claim 1, wherein: the bottom end of the inner wall of the driving port (201) is welded with a wear-resistant steel plate (202), and anti-skid lines are arranged on the wear-resistant steel plate (202).

3. A non-breakable screw according to claim 2, wherein: the outer surface of the screw head (2) is provided with a protective layer (203).

4. A non-breakable screw according to claim 3, wherein: the utility model discloses a screw rod, including screw rod (1), reinforcement subassembly includes anti-fault layer (101), central basic unit (103) and expansion ring (5), anti-fault layer (101) and central basic unit (103) from interior to exterior set up inside screw rod (1), be provided with filling layer (102) between anti-fault layer (101) and central basic unit (103), expansion ring (5) set up on screw rod (1), expansion ring (5) surface is provided with parallel surface (501) and slant concave surface (502).

5. A non-breakable screw according to claim 4, wherein: the corners of the parallel surface (501) are designed to be arc-shaped.

6. The unbreakable screw of claim 5, wherein: the anti-fault layer (101) and the filling layer (102) are wrapped outside the central base layer (103) from inside to outside.