CN211550205U

CN211550205U - Self-tapping locking screw

Info

Publication number: CN211550205U
Application number: CN201922356938.8U
Authority: CN
Inventors: 潘贻华; 吴伟清; 柳煜; 潘泽宇
Original assignee: Zhejiang Lihang Automobile Parts Co ltd
Current assignee: Zhejiang Lihang Automobile Parts Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-09-22
Anticipated expiration: 2029-12-24

Abstract

The utility model relates to the technical field of screws, and aims to provide a self-tapping locking screw, which comprises a screw rod and a nut; the side wall of the screw rod is circumferentially provided with a plurality of accommodating grooves which extend along the length direction of the screw rod and penetrate through one end of the screw rod, which is far away from the screw cap; the utility model discloses can conveniently twist in the prefabricated hole.

Description

Self-tapping locking screw

Technical Field

The utility model relates to a screw technical field, in particular to self tapping locking screw.

Background

The self-tapping locking screw is a coarse thread common thread series, and the screw is a coarse thread common thread series; the cross section of the thread part of the self-tapping locking screw is triangular and circular, the thread tooth form is the same as the common thread, but the effective diameter of the self-tapping locking screw is larger than the common thread, and the screw can extrude internal threads on a prefabricated unthreaded hole of a machine body with plastic deformation capacity in a common screwing mode by being matched with a conical guide part at the front end of the screw, so that the interference connection is realized.

At present, a self-tapping locking screw is disclosed in a chinese patent document with an authorization publication number of CN101561007B in the prior art, the device includes a screw head, a middle thread locking section and a tail guide section, and the cross section of the major diameter of the thread locking section is a pentagon formed by five large arc-shaped side lines. A small arc line is in transition between every two adjacent large arc sidelines; the axial direction of the guide section is provided with a taper, the guide section is also provided with a thread, the cross section of the major diameter of the thread is also a pentagon formed by five large arc-shaped sidelines, and the two adjacent large arc-shaped sidelines are in transition by a small arc-shaped line.

Generally, the pore size of the prefabricated hole needs to be matched with the nominal diameter of the self-tapping locking screw, however, in actual work, when operators prepare fewer self-tapping locking screws in different sizes, the self-tapping locking screws are difficult to correspond to all prefabricated holes one by one, and therefore the situation that the self-tapping locking screws are screwed into some prefabricated holes with smaller pore sizes often occurs; this self tapping locking screw extrudes the in-process of screw thread at prefabricated downthehole wall, and the inner wall in prefabricated hole receives some pieces of discharge when screw thread's effect produces the internal thread, but because the clearance between prefabricated hole and this self tapping locking screw is less, leads to the piece to pile up and is difficult to fall to prefabricated downthehole portion between the two, makes the screw twist deepening, the piece piles up more, and the screw is difficult to continue to twist in the prefabricated downthehole more.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a self tapping locking screw can conveniently twist in the prefabricated hole.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a self-tapping locking screw comprises a screw rod and a screw cap; the screw rod lateral wall is provided with a plurality of holding tanks which extend along the length direction of the screw rod and penetrate through one end of the screw rod far away from the screw cap along the circumferential direction.

Through adopting above-mentioned technical scheme, self tapping locking screw is twisting prefabricated downthehole in-process, and the piece that prefabricated downthehole wall produced can arrange to prefabricated hole bottom through the holding tank, has avoided the piece to pile up between screw rod lateral wall and prefabricated downthehole wall, leads to this self tapping locking screw to be difficult to twist completely in the prefabricated downthehole.

The utility model discloses further set up to: the screw cap is characterized in that a caulking groove is formed in one end, far away from the screw rod, of the screw cap, a rubber pad is embedded in the caulking groove, and one end, far away from the bottom of the caulking groove, of the rubber pad is located on the outer side of the screw cap.

By adopting the technical scheme, after the self-tapping locking screw is screwed into a certain component, the nut generally protrudes out of the surface of the component, when the surface of the component is abutted against other components, the nut can scratch the surface of other components due to material problems, and the surface of other components can be contacted with the rubber pad through the rubber pad, so that the surface scratch is avoided.

The utility model discloses further set up to: the side wall of the caulking groove inclines towards the center direction of the caulking groove.

Through adopting above-mentioned technical scheme, prevent that the rubber pad from deviating from in the caulking groove.

The utility model discloses further set up to: the diameter of one end, far away from the screw cap, of the screw rod is gradually reduced towards the direction far away from the screw cap along the axial direction.

Through adopting above-mentioned technical scheme, the terminal diameter of screw rod is less, can conveniently insert prefabricated downthehole.

The utility model discloses further set up to: one end of the screw rod, which is far away from the screw cap, is provided with a tail tip which is conical.

Through adopting above-mentioned technical scheme, can make this self tapping locking screw can carry out reaming earlier when the less prefabricated downthehole of screw in through the tail tip, make it more conveniently twist in this prefabricated downthehole.

The utility model discloses further set up to: the tail-tip-face is provided with a connecting rod towards one end of the screw rod at the center, an external thread is arranged on the side wall of the connecting rod, and a connecting groove in threaded fit with the connecting rod is formed in one end, far away from the nut, of the screw rod.

Through adopting above-mentioned technical scheme, make tail point and screw rod can dismantle, can pull down from the screw rod after the tail point expands the hole, avoid this self tapping locking screw to twist incompletely, tail point reuse simultaneously.

The utility model discloses further set up to: two opposite operation grooves are formed in the outer side wall of the tail tip.

Through adopting above-mentioned technical scheme, the accessible inserts the operation inslot respectively with the instrument that the operation groove corresponds, unscrews the tail tip.

The utility model discloses further set up to: the nut is provided with the rubber circle towards the one end of screw rod in the surrounding, the rubber circle cover is located on the screw rod.

Through adopting above-mentioned technical scheme, play the cushioning effect, prevent that this thread forming locking screw from to the part surface production mar that twists.

To sum up, the beneficial effects of the utility model are that:

1. in the process that the tapping and locking screw is screwed into the prefabricated hole, debris generated by the inner wall of the prefabricated hole can be discharged to the bottom of the prefabricated hole through the accommodating groove, so that the debris is prevented from being accumulated between the outer side wall of the screw and the inner side wall of the prefabricated hole, and the tapping and locking screw is difficult to be screwed into the prefabricated hole completely;

2. the self-tapping locking screw can be reamed when being screwed into a smaller prefabricated hole through the tail tip, so that the self-tapping locking screw can be screwed into the prefabricated hole more conveniently.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention.

Reference numerals: 1. a screw; 11. accommodating grooves; 12. connecting grooves; 2. a nut; 21. a rubber ring; 22. caulking grooves; 3. a rubber pad; 4. tail tip; 41. a connecting rod; 42. the tank is operated.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a self-tapping locking screw, as shown in fig. 1 and 2, which comprises a screw rod 1 and a nut 2, wherein one end of the nut 2 facing the screw rod 1 is fixedly connected with a rubber ring 21 which is arranged in a surrounding manner, and the rubber ring 21 is sleeved on the screw rod 1 to play a role in buffering; the diameter of one end of the screw 1, which is far away from the screw cap 2, is gradually reduced along the axial direction towards the direction far away from the screw cap 2, so that the screw 1 is conveniently screwed into the prefabricated hole; the lateral wall of the screw rod 1 is circumferentially provided with three accommodating grooves 11 which extend along the length direction of the screw rod 1 and penetrate through one end of the screw rod 1 far away from the screw cap 2, so that the fragments in the prefabricated hole can be conveniently discharged to the bottom of the prefabricated hole.

As shown in fig. 1 and 2, a caulking groove 22 is formed in one end of the nut 2, which is far away from the screw 1, a rubber pad 3 is poured into the caulking groove 22, and one end of the rubber pad 3, which is far away from the bottom of the caulking groove 22, is located outside the nut 2, so that the end of the nut 2 is softer, and the nut 2 is prevented from scratching the surfaces of other workpieces; the side wall of the insertion groove 22 is inclined toward the center of the insertion groove 22, so that the rubber pad 3 is not easily removed from the insertion groove 22.

As shown in fig. 1 and 2, one end of the screw rod 1 far away from the nut 2 is detachably connected with a conical tail tip 4 with a hole expanding function; a connecting rod 41 is integrally formed at the center of one end of the tail tip 4 facing the screw rod 1, an external thread is arranged on the side wall of the connecting rod 41, and a connecting groove 12 in threaded fit with the connecting rod 41 is formed at one end of the screw rod 1 far away from the screw cap 2; two opposite operation grooves 42 convenient for operating the tail tip 4 are formed in the outer side wall of the tail tip 4.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A self-tapping locking screw comprises a screw rod (1) and a screw cap (2); the method is characterized in that: the lateral wall of the screw rod (1) is provided with a plurality of accommodating grooves (11) which extend along the length direction of the screw rod (1) and penetrate through one end, far away from the nut (2), of the screw rod (1) along the circumferential direction.

2. A thread forming screw as recited in claim 1, wherein: the screw cap is characterized in that an embedded groove (22) is formed in one end, far away from the screw rod (1), of the screw cap (2), a rubber pad (3) is embedded into the embedded groove (22), and one end, far away from the bottom of the embedded groove (22), of the rubber pad (3) is located on the outer side of the screw cap (2).

3. A thread forming screw as recited in claim 2, wherein: the side wall of the caulking groove (22) inclines towards the center direction of the caulking groove (22).

4. A thread forming screw as recited in claim 1, wherein: the diameter of one end, far away from the screw cap (2), of the screw rod (1) is gradually reduced towards the direction far away from the screw cap (2) along the axial direction.

5. A thread forming screw as recited in claim 4, wherein: one end of the screw rod (1) far away from the screw cap (2) is provided with a conical tail tip (4).

6. A thread forming screw as recited in claim 5, wherein: the tail tip (4) is provided with connecting rod (41) towards the one end of screw rod (1) in center department, be provided with the external screw thread on the lateral wall of connecting rod (41), screw rod (1) is kept away from the one end of nut (2) and is seted up spread groove (12) with connecting rod (41) screw-thread fit.

7. A thread forming screw as recited in claim 6, wherein: two opposite operation grooves (42) are formed in the outer side wall of the tail tip (4).

8. A thread forming screw as recited in claim 1, wherein: the screw cap (2) is provided with a rubber ring (21) in a surrounding mode towards one end of the screw rod (1), and the screw rod (1) is sleeved with the rubber ring (21).