CN213981579U

CN213981579U - Retaining countersunk head screw

Info

Publication number: CN213981579U
Application number: CN202023024334.2U
Authority: CN
Inventors: 潘金良
Original assignee: Jiaxing Xinfeng Minfeng Screw Factory
Current assignee: Jiaxing Xinfeng Minfeng Screw Factory
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-17
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses a stopping countersunk screw, including the screw rod, set up in the bolt head of screw rod one end, wherein, be provided with at least one stopping muscle that can empty under the exogenic action on the side of bolt head, be equipped with the screw thread on the screw rod, be equipped with the stopping structure that is used for preventing the screw to empty under the exogenic action on the screw thread, the stopping structure is including setting up first stopping portion and the second stopping portion on the screw thread, first stopping portion includes first deformation portion and second deformation portion, first deformation portion is the same with the structure of second deformation portion, and first deformation portion is the deformation portion that sets up on the screw thread. Through the deformation portion that the first deformation portion on the screw thread set up on the screw thread, when the screw was in getting into the threaded hole, the direction of motion of deformation arch and screw was unanimous, appeared deformation portion in smooth threaded connection department, and the screw thread produces great resistance here, and the screw receives exogenic action such as vibration also can not loosen and take off.

Description

Retaining countersunk head screw

Technical Field

The utility model relates to a screw field, especially a stopping countersunk screw.

Background

The screw is used as a common fastener in a large number of applications in various industries, and countersunk head screw often is used in the position that the screw can not outcrop, and this requirement often makes the screw can not use with the packing ring cooperation to make the screw can take off because of vibrations in the use, bring the hidden danger for producing the safety. The conventional ribbed screw is easy to cause great damage when the retaining rib is connected with a contact surface of a fixed object because the retaining rib cannot be inclined.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can keep in vibrations the stopping countersunk screw who screws up the state and do not harm the contact surface between fixture and the screw.

The technical scheme provided for realizing the purpose is as follows:

the utility model provides a stopping countersunk screw, includes the screw rod, sets up in the bolt head of screw rod one end, wherein, be provided with at least one stopping muscle that can empty under the exogenic action on the side of bolt head, be equipped with the screw thread on the screw rod, be equipped with the stopping structure that is used for preventing the screw to empty under the exogenic action on the screw thread.

On the basis of the above scheme and as a preferable scheme of the scheme: the retaining structure comprises a first retaining portion and a second retaining portion which are arranged on the threads.

On the basis of the above scheme and as a preferable scheme of the scheme: the first retaining portion comprises a first deformation portion and a second deformation portion, the first deformation portion and the second deformation portion are identical in structure, and the first deformation portion is a deformation portion arranged on the thread.

On the basis of the above scheme and as a preferable scheme of the scheme: the second stopping part is a stopping sleeve sleeved on the thread.

On the basis of the above scheme and as a preferable scheme of the scheme: the number of the retaining ribs is 3, and the retaining ribs are uniformly distributed on the side face of the bolt head.

On the basis of the above scheme and as a preferable scheme of the scheme: the length L of the stopping rib is 2/3 of the length L of the generatrix of the truncated cone of the bolt head.

On the basis of the above scheme and as a preferable scheme of the scheme: the thickness delta of the retaining rib is 1/4D or more and 1/3D or less, and the thickness delta of the retaining rib is not more than 2 mm.

On the basis of the above scheme and as a preferable scheme of the scheme: the height h of the retaining rib is 1/3D or more and 1/2D or less, and the height h of the retaining rib is not higher than 4 mm.

The utility model has the advantages that: the conical surface of the bolt head of the countersunk head screw is provided with at least one retaining rib, when the screw is screwed down, the retaining rib is inclined under the action of external force, and the inclined retaining rib generates a reaction force when the bolt needs to be loosened, so that the effect of preventing the screw from loosening is achieved.

Drawings

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

FIG. 1 is a structural view of a retaining countersunk head screw;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an enlarged view of a portion A of the present invention;

fig. 4 is a partial enlarged view of the present invention.

In the figure: 1. a screw; 2. a bolt head; 3. stopping ribs; 4. a first deformation portion; 5. a second deformation portion; 6. and (4) a backstop sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step, based on the given embodiments, fall within the scope of protection of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.

A countersunk screw (hereinafter referred to as a countersunk screw) with a retaining rib shown in fig. 1 to 4 comprises a screw rod 1, wherein a thread is arranged on the screw rod, a bolt head 2 is arranged at one end of the screw rod, which is far away from the thread, the bolt head 2 is in a round platform structure, and at least one retaining rib is arranged on the side surface of the bolt head; preferably, the number of stopping muscle 3 is three, and the equipartition is on the conical surface of bolt head 2, and the stopping muscle of this number and distribution can enough effectually play the stopping effect, also be so that because the too many increasement manufacturing cost of stopping muscle or because the stopping muscle is too few and lead to the stopping effect not good. The length of the retaining rib can be set to ensure that the length of the retaining rib can be changed adaptively along with the change of the specification of the countersunk head screw so as to ensure that the retaining rib 3 has enough strength to prevent the bolt from loosening;

furthermore, when the bolt specification is M2, namely the screw diameter D is 2mm, the thickness delta of the retaining rib is 0.5mm, when the bolt specification is M6, namely the screw diameter D is 6mm, the numerical range of the thickness delta of the retaining rib is controlled to be 1.5-2 mm, and when the bolt specification is M8 or about M8, the numerical range of the thickness delta of the retaining rib is 2 mm. The relationship between the thickness delta of the retaining rib and the diameter D of the screw is as follows: the thickness delta of stopping muscle is 1/4 ~ 1/3 of countersunk head screw diameter D, and the thickness of stopping muscle is not more than 2mm, and this kind of settlement can guarantee that the thickness of stopping muscle can suit with the bolt specification when the bolt specification is less, and the settlement of 2mm thickness will guarantee that the stopping muscle can not lead to not empting because of stopping muscle thickness is too thick when the bolt specification is great yet.

Furthermore, the height h of the retaining rib is 1/3-1/2 of the diameter D of the screw rod of the countersunk head screw, and the height is not higher than 4mm, and the detailed corresponding relationship is as follows: when the specification of the bolt is less than or equal to M4, namely the diameter D of the screw is less than or equal to 4mm, the height h of the retaining rib is 1/3, when the specification of the screw is in the range from M4 to M8 (excluding M4), the height of the retaining rib is 1/2 of the diameter D of the screw, and when the specification of the bolt is greater than M8, the height of the retaining rib is constant 4 mm. The height that can effectual assurance retaining muscle of this kind of settlement can change along with the transform of bolt specification, nevertheless can not too big because of the bolt specification, leads to the retaining muscle too high and causes too big damage to the fixture surface at countersunk head screw place.

The following is a detailed specification comparison table:

the utility model discloses a theory of operation does: the retaining rib 3 arranged on the side face of the bolt head 2 is in surface contact with a fixed object where the retaining rib is located in the screwing process, when the bolt is continuously screwed, one side of the retaining rib 3 connected with the bolt head is subjected to the pulling force from the bolt head, one side of the retaining rib 3 in surface contact with a carrier is subjected to the friction effect between the retaining rib and a contact surface, and the retaining rib is inclined due to the interaction of the retaining rib and the contact surface. And finally, when the countersunk head screw is screwed down, the retaining rib is also pressed into the surface of the fixture where the retaining rib is located. When the bolt has the momentum of shaking loose under the effect of shaking, the backstop rib pressed into the surface of the countersunk head screw fixture props against the groove pressed out of the surface of the fixture, and an acting force opposite to the loosening direction of the retaining rib is generated, so that the effect of preventing the countersunk head screw from loosening is achieved. The utility model provides a stopping muscle compares for current stopping muscle, has the little advantage of contact surface damage with countersunk screw on the place fixture.

Preferably, the screw rod is provided with threads, and the threads are provided with retaining structures for preventing the screws from toppling under the action of external force.

Further, the retaining structure comprises a first retaining portion and a second retaining portion which are arranged on the threads. Set up first stopping portion and second stopping portion and can carry out the two-stage stopping, be favorable to strengthening the stability of screw.

In detail, the first retaining portion includes a first deformation portion and a second deformation portion, the first deformation portion and the second deformation portion have the same structure, and the first deformation portion is a deformation portion provided on the thread. Through the deformation portion that the first deformation portion on the screw thread set up on the screw thread, when the screw was in getting into the threaded hole, the direction of motion of deformation arch and screw was unanimous, appeared deformation portion in smooth threaded connection department, and the screw thread produces great resistance here, and the screw receives exogenic action such as vibration also can not loosen and take off.

Specifically, the second retaining portion is a retaining sleeve sleeved on the thread. It should be noted that the retaining sleeve is made of a plastic material with good toughness, and when the screw rod enters the threaded hole, the retaining sleeve is favorable for the thread on the screw rod and the internal thread in the threaded hole to form a clamping state, so that the stability of the screw is favorably maintained.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a stopping countersunk screw, includes the screw rod, sets up in the bolt head of screw rod one end, its characterized in that: the screw bolt is characterized in that at least one retaining rib capable of being toppled under the action of external force is arranged on the conical surface of the bolt head, a thread is arranged on the screw rod, and a retaining structure used for preventing the screw from toppling under the action of the external force is arranged on the thread.

2. The anti-backup countersunk head screw as claimed in claim 1, wherein: the retaining structure comprises a first retaining portion and a second retaining portion which are arranged on the threads.

3. The anti-backup countersunk head screw as claimed in claim 2, wherein: the first retaining portion comprises a first deformation portion and a second deformation portion, the first deformation portion and the second deformation portion are identical in structure, and the first deformation portion is a deformation portion arranged on the thread.

4. The anti-backup countersunk head screw as claimed in claim 2, wherein: the second stopping part is a stopping sleeve sleeved on the thread.

5. The anti-backup countersunk head screw as claimed in claim 1, wherein: the number of the retaining ribs is 3, and the retaining ribs are uniformly distributed on the side face of the bolt head.

6. The anti-backup countersunk head screw as claimed in claim 1 or 5, wherein: the length L of the stopping rib is 2/3 of the length L of the generatrix of the truncated cone of the bolt head.

7. The anti-backup countersunk head screw as claimed in claim 6, wherein: the thickness delta of the retaining rib is 1/4D or more and 1/3D or less, and the thickness delta of the retaining rib is not more than 2 mm.

8. The anti-backup countersunk head screw as claimed in claim 7, wherein: the height h of the retaining rib is 1/3D or more and 1/2D or less, and the height h of the retaining rib is not higher than 4 mm.