CN213794646U

CN213794646U - Wedge-shaped anti-loosening thread tap

Info

Publication number: CN213794646U
Application number: CN202022471419.9U
Authority: CN
Inventors: 颜炳姜; 李伟秋
Original assignee: Smartguy Intelligent Equipment Co ltd; Conprofe Technology Group Co Ltd; Smartguy Intelligent Equipment Co Ltd Guangzhou Branch
Current assignee: Smartguy Intelligent Equipment Co ltd; Conprofe Technology Group Co Ltd; Smartguy Intelligent Equipment Co Ltd Guangzhou Branch
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-07-27
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to a wedge locking thread tap, including the working segment, the working segment includes base member and a plurality of cutting awl sword, and single cutting awl sword includes first side, connects face, top surface platform and second side, is connected through being connected the face between first side and the top surface platform, and the second side is connected through the top surface platform with being connected between the face, connects and forms the acute angle between the axis forward direction of face and base member. Can enough guarantee to connect the face for the inclined plane, guarantee the internal thread wedge inclined plane angle that wedge locking thread tap processed out, again through addding the top surface platform, avoid the crest department of smear metal tapered edge to present sharp-pointed 90 sharp-teeth angles, and then reduce the grinding wheel frequency of finishing in the manufacturing process and guarantee the machining precision simultaneously to because of crest department is too sharp to cause the blade wearing and tearing too big or collapse when avoiding traditional tap processing internal thread, improved tap life greatly.

Description

Wedge-shaped anti-loosening thread tap

Technical Field

The utility model relates to a screw tap technical field especially relates to a wedge locking thread screw tap.

Background

In the mechanical industry, various machines and parts can not be separated from a fastener, but the fastener can automatically loosen in violent movement, and the loosening problem is solved by using a 30-degree wedge-shaped anti-loosening thread in the industry at present. Specifically, a 30-degree wedge-shaped inclined plane is arranged at the root of the 30-degree wedge-shaped internal thread, when the nut and the bolt are screwed tightly, the tooth tip of the bolt can be tightly propped against the 30-degree wedge-shaped inclined plane, the normal force generated by the contact between the threads and the bolt form an angle of 60 degrees, and the normal pressure applied to the 30-degree wedge-shaped inclined plane is far greater than the fastening pressure, so that the anti-loosening friction force is greatly increased, and the problems of uneven stress, tripping and seizure of common threads and the like can be solved.

At present, traditional locking thread screw tap of wedge presents 30 wedge inclined planes for the internal thread of guaranteeing to process out, and the department of bearing down the top of screw tap is sharp-pointed 90 cusps, for guaranteeing this 90 cusps, need relapse to be maintained with the emery wheel, keeps the high-frequency processing state control and product self-checking number of times for traditional locking thread screw tap of wedge processing man-hour is high, and the machining precision is difficult to control, leads to the cost high, and production efficiency is difficult to improve. And the traditional wedge-shaped anti-loosening thread tap has concentrated stress at the tooth tip in the machining process, is very easy to break in the machining or turnover process, is not beneficial to reducing the tool changing rate of the tap and prolonging the service life of the tap, and the surface quality of the machined internal thread is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the wedge-shaped anti-loosening threaded tap needs to be provided for solving the technical problems, so that the machining precision is guaranteed while the number of times of grinding wheel finishing in the tap machining is reduced, and the service life of the tap is effectively prolonged.

The utility model provides a wedge locking thread tap, includes the working segment, the working segment includes base member and a plurality of cutting awl sword, a plurality of chip grooves have been seted up on the base member, adjacent two between the chip groove be provided with a plurality ofly on the base member is global cutting awl sword, single cutting awl sword along the circumference extension setting of base member, a plurality of cutting awl sword are arranged along the axis direction of base member and are distributed, singly cutting awl sword includes first side, connection face, top surface platform and second side, first side with connect through connecting the face between the top surface platform, the second side with connect and pass through between the face the top surface platform is connected, connect the face with form the acute angle between the forward direction of axis of base member.

In one embodiment, the connecting surface and the top platform are in transitional connection through a first arc surface.

In one embodiment, the second side surface and the top platform are transitionally connected through a second arc surface.

In one embodiment, a first included angle formed between the first side surface and the connecting surface is an obtuse angle.

In one embodiment, a second included angle formed between the connecting surface and the top platform is an obtuse angle.

In one embodiment, a third included angle formed between the second side surface and the top platform is an obtuse angle.

In one embodiment, the acute angle formed between the connection face and the axial forward direction of the base body is 30 ° or 60 °.

In one embodiment, the flutes extend in the axial direction of the base and through the end face of the base.

In one embodiment, the device further comprises a rod body section, wherein the rod body section is arranged at one end of the base body and is cylindrical.

In one embodiment, the clamping device further comprises a clamping segment, wherein the clamping segment is positioned at one end of the rod body segment far away from the base body.

The wedge-shaped anti-loosening thread tap has at least the following advantages:

through set up on single cutting awl sword and connect face and top surface platform, connect through connecting the face between first side and the top surface platform, second side is connected through the top surface platform with connecting between the face, it forms the acute angle to connect between the axis forward direction of face and base member, therefore, can enough guarantee to connect the face for being the inclined plane of acute angle, the internal thread wedge inclined plane angle of guaranteeing wedge locking thread tap processing out, again through addding the top surface platform, the crest department of avoiding smear metal awl sword presents sharp-pointed 90 cusps, and then reduce the grinding wheel frequency of repairing in the manufacturing process and guarantee the machining precision simultaneously, the intensity of the blade of cutting awl sword has been increased, and because of crest department too sharp blade wearing and tearing are too big or collapse when avoiding traditional tap processing internal thread, the screw tap life has been improved greatly.

Drawings

FIG. 1 is a schematic view of a wedge lock thread tap in one embodiment;

fig. 2 is an enlarged view of a portion of the wedge lock thread tap shown in fig. 1.

10, a wedge-shaped anti-loosening thread tap; 100. a clamping section; 200. a rod section; 300. a working section; 310. a substrate; 320. cutting a conical blade; 330. a chip groove; 321. a first side surface; 322. a connecting surface; 323. a top platform; 324. a second side surface; 325. a first arc surface; 326. a second arc surface.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It should be noted that, in this document, the "axial forward direction of the substrate" means: the axis of the base body is toward the direction close to the workpiece to be machined.

Referring to fig. 1 and 2, in one embodiment, a wedge-shaped anti-loosening threading tap 10 includes a clamping section 100, a rod section 200, and a working section 300, wherein the rod section 200 is disposed between the clamping section 100 and the working section 300. Specifically, the rod segment 200 is cylindrical and the cross-section of the gripping segment 100 is non-circular, e.g., the cross-section of the gripping segment 100 is square. Of course, in other embodiments, the cross-section of the clamping segment 100 may also be hexagonal or pentagonal, etc.

The working segment 300 comprises a base 310 and a plurality of cutting cone blades 320, the rod segment 200 is disposed at one end of the base 310, and the clamping segment 100 is disposed at one end of the rod segment 200 away from the base 310. The base 310 is further provided with a plurality of chip grooves 330, and the chip grooves 330 are used for discharging chips during the machining process. Specifically, the number of the chip grooves 330 in the present embodiment is four, and the four chip grooves 330 extend in the axial direction of the base 310 and penetrate the end surface of the base 310. Therefore, the chip discharge groove 330 can effectively discharge chips generated during the process. Of course, in other embodiments, the chip discharge groove 330 may also be a spiral groove, and the shape of the chip discharge groove 330 may be adaptively designed according to actual processing requirements.

A plurality of cutting conical blades 320 are arranged on the circumferential surface of the base body 310 between two adjacent flutes 330, a single cutting conical blade 320 extends along the circumferential direction of the base body 310, and the plurality of cutting conical blades 320 are arranged and distributed along the axial direction of the base body 310. The single cutting cone edge 320 includes a first side surface 321, a connecting surface 322, a top platform 323, and a second side surface 324, the first side surface 321 is connected to the top platform 323 through the connecting surface 322, the second side surface 324 is connected to the connecting surface 322 through the top platform 323, and the connecting surface 322 forms an acute angle (as shown by α in fig. 2) with the axial forward direction of the base body 310. In the illustrated embodiment, the acute angle may be 30 °, i.e., the connection face 322 is a 30 ° wedge-shaped bevel. Of course, in other embodiments, the acute angle may also be 60 °.

A wedge-shaped inclined plane of 30 degrees is arranged at the root of the machined wedge-shaped internal thread of 30 degrees, when the nut studs are screwed tightly, the tooth tips of the studs can tightly abut against the wedge-shaped inclined plane of 30 degrees, and compared with the traditional nut stud connection, the nut stud connection generates large locking force. The normal force generated by the contact between the threads forms an angle of 60 degrees with the stud, and the normal pressure applied to the wedge threads of 30 degrees is far greater than the fastening pressure, so the anti-loosening friction force is greatly increased, and the problems of uneven stress, tripping, seizure and the like of common threads can be solved.

When the stud and the nut are screwed up mutually, the tooth tip of the stud is propped against the 30-degree wedge-shaped inclined surface of the internal thread of the nut, only line-surface contact is realized in the meshing process, the stress analysis on the 30-degree wedge-shaped inclined surface shows that the normal force generated by the meshing contact forms 60 degrees with the axis of the stud, and the normal force is uniformly distributed on the full length of the contacted thread line. It can be seen that the wedge-shaped surface angle of the internal thread machined by the wedge-shaped anti-loosening thread tap 10 must be ensured, but the intersection point of the wedge-shaped inclined surface and the tooth-shaped extension line is not excessively required.

The embodiment is developed on the basis, so that the wedge-shaped inclined plane angle is ensured, the concentrated stress borne during the screw tap machining is structurally reduced, and the edge breakage is avoided. After the tooth profile of the cutting conical edge 320 is machined on the tap according to the traditional process, a connecting surface 322 is machined on the basis of the cutting conical edge 320 by using an online grinding wheel dressing technology, so that an included angle of 30 degrees is formed between the connecting surface 322 and the axial line forward direction of the base body 310, and then a top surface platform 323 is additionally arranged between the connecting surface 322 and the second side surface 324 by finely grinding the tooth diameter.

Therefore, the connecting surface 322 can be ensured to be an inclined surface inclined by 30 degrees, the angle of the internal thread wedge-shaped inclined surface processed by the wedge-shaped anti-loosening threaded screw tap 10 is ensured, the crest of the cutting conical blade is prevented from presenting sharp 90-degree cusp angle by additionally arranging the top surface platform 323, the grinding wheel finishing frequency in the manufacturing process is further reduced, the processing precision is ensured, the strength of the cutting edge of the cutting conical blade is increased, excessive abrasion or breakage of the cutting edge caused by over sharp crest during the process of processing internal threads by the traditional screw tap is avoided, and the service life of the screw tap is greatly prolonged.

Further, the connecting surface 322 and the top surface platform 323 are in transitional connection through the first arc surface 325, and the second side surface 324 and the top surface platform 323 are in transitional connection through the second arc surface 326, so that the top surface platform 323, the connecting surface 322 and the second side surface 324 are in transitional connection through smooth and gentle arc surfaces, a better supporting effect can be achieved for later-stage coating work, mechanical stress is effectively absorbed, and the friction performance of the screw tap is improved.

Further, a first included angle formed between the first side surface 321 and the connecting surface 322 is an obtuse angle. A second included angle formed between the connecting surface 322 and the top surface plateau 323 is an obtuse angle. The third included angle formed between the second side surface 324 and the top surface platform 323 is an obtuse angle. Therefore, the processing speed can be increased.

Further, two adjacent cutting conical edges 320 are transitionally connected through a circular arc groove. The chips generated during processing can be timely removed through the arc groove, and the accumulation of the chips is avoided.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a wedge locking thread tap, its characterized in that, includes the working segment, the working segment includes base member and a plurality of cutting awl sword, a plurality of chip grooves have been seted up on the base member, adjacent two between the chip groove be provided with a plurality ofly on the base member is global cutting awl sword, single cutting awl sword along the circumference extension setting of base member, a plurality of cutting awl sword along the axis direction of base member arrange and distribute, single cutting awl sword includes first side, connection face, top surface platform and second side, first side with connect through the connection face between the top surface platform, the second side with connect through between the face the top surface platform is connected, connect the face with form the acute angle between the forward direction of axis of base member.

2. The wedge lock thread tap of claim 1 wherein said connection face and said top land are transitionally connected by a first arcuate surface.

3. The wedge lock thread tap of claim 1 wherein said second flank is transitionally connected to said top land by a second arcuate surface.

4. A wedge lock thread tap as claimed in claim 1, wherein a first included angle formed between said first side surface and said connection surface is an obtuse angle.

5. A wedge lock thread tap as claimed in claim 1, wherein said second angle formed between said connection face and said top land is an obtuse angle.

6. The wedge lock thread tap of claim 1 wherein a third included angle formed between said second flank and said top land is an obtuse angle.

7. A wedge anti-loosening threading tap as claimed in claim 1, wherein an acute angle formed between said connection face and an axial forward direction of said base body is 30 ° or 60 °.

8. A wedge anti-loosening thread tap according to any one of claims 1 to 7, wherein said flutes extend in the axial direction of said base and penetrate the end face of said base.

9. A wedge anti-loosening threading tap according to any one of claims 1 to 7 further comprising a shank segment disposed at one end of said base, said shank segment being cylindrical.

10. The wedge anti-loosening thread tap according to claim 9 further comprising a clamping section located at an end of said shank section remote from said base.