CN219413171U

CN219413171U - Self-tapping screw assembly for high-strength balance weight

Info

Publication number: CN219413171U
Application number: CN202320037829.3U
Authority: CN
Inventors: 梁三石; 陈爽伟; 王安波; 焦练; 周林; 姜斌波
Original assignee: Zhejiang Keteng Precision Machinery Co ltd
Current assignee: Zhejiang Keteng Precision Machinery Co ltd
Priority date: 2023-01-07
Filing date: 2023-01-07
Publication date: 2023-07-25
Anticipated expiration: 2033-01-07

Abstract

The utility model relates to the field of self-tapping screw assembly devices, and discloses a self-tapping screw assembly for a high-strength balance block, which comprises a nut, wherein a bolt is fixedly connected to the middle part of the rear end of the nut, blackening treatment is carried out on the outer side of the bolt, the hardness of the bolt is 30-37HRC, threads are arranged on the outer side of the bolt, a flat gasket is sleeved at the position, close to the front, of the outer side of the bolt, a through hole is arranged in the middle of the flat gasket, the included angle between end faces of the threads is forty five degrees, the diameter of the bolt is 6.3mm, the diameter of the thread is 9mm, the diameter of the through hole is 7.3mm, and the pitch between the threads is 4mm. According to the utility model, the hardness of the bolt is improved, so that the bolt is effectively prevented from bending during self-tapping of the threaded hole, and meanwhile, the flat gasket with a larger diameter is sleeved on the outer side of the bolt, so that the limit work can be effectively achieved.

Description

Self-tapping screw assembly for high-strength balance weight

Technical Field

The utility model relates to the field of self-tapping screw assembly devices, in particular to a self-tapping screw assembly for a high-strength balance block.

Background

The self-tapping screw is a threaded fastener for self-tapping the matched female threads in the pre-drilling holes of metal or non-metal materials, and is mostly used for connecting thin metal plates (steel plates, saw plates and the like) or wood materials, when in connection, a threaded bottom hole is firstly manufactured on a connected piece, then the self-tapping screw is screwed into the threaded bottom hole of the connected piece, and because the threaded surface of the self-tapping screw has higher hardness, internal threads can be tapped in the threaded bottom hole of the connected piece, thereby forming the connection

In the prior art, although the self-tapping screw is used for fixing or limiting in the balance block, the screw is low in hardness and the diameter of the screw head of the screw is small, so that the self-tapping screw cannot well play a role in fixing or limiting, and the self-tapping screw is low in hardness and easy to bend, and therefore, a self-tapping screw assembly for the high-strength balance block is provided by a person skilled in the art so as to solve the problems in the background art.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a self-tapping screw assembly for a high-strength balance block, which is used for effectively preventing the self-tapping screw assembly from bending when a threaded hole is tapped by improving the hardness of the bolt, and meanwhile, a flat gasket with a larger diameter is sleeved outside the bolt, so that the limiting work can be effectively performed.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the self-tapping screw assembly for the high-strength balance block comprises a nut, wherein the middle part of the rear end of the nut is fixedly connected with a bolt, the outer side of the bolt is provided with threads, the outer side of the bolt is sleeved with a flat gasket at the front position, and the middle part of the flat gasket is provided with a through hole;

through the technical scheme, the hardness of the bolt is improved to 30-37HRC, so that the tapping screw has better strength, bending caused by lower hardness in the process of tapping is prevented, the use cost is increased, and the convenience of installation is effectively improved.

Further, blackening is carried out on the outer side of the bolt;

through the technical scheme, blackening treatment is carried out on the surface of the bolt, so that the bolt is effectively corrosion-resistant.

Further, the bolt hardness is 30-37HRC;

through the technical scheme, bending is effectively prevented in the working process.

Further, the included angle between the thread end faces is forty-five degrees;

through the technical scheme, the uterus screw can be better engaged with a balance block.

Further, the bolt diameter is 6.3mm;

further, the thread diameter is 9mm;

through the technical scheme, the depth of the threaded hole in the side wall of the bolt is properly increased, and the efficiency of punching holes on the balance weight can be effectively improved.

Further, the diameter of the through hole is 7.3mm;

through above-mentioned technical scheme for the flat gasket can rotate and can not drop on the bolt surface.

Further, the pitch between the threads is 4mm;

through the technical scheme, the opening efficiency is effectively improved.

The utility model has the following beneficial effects:

1. in the utility model, the hardness of the bolt is improved to 30-37HRC, so that the tapping screw has better strength, bending caused by lower hardness in the process of tapping is prevented, the use cost is increased, and the convenience of installation is effectively improved.

2. According to the utility model, the outer side of the bolt is sleeved with the flat gasket with a larger diameter, so that good limiting work can be realized in the process of installing the balance weight, and meanwhile, the effect of preventing the bolt from loosening can be realized when the bolt is screwed down.

3. According to the utility model, the depth of the threaded hole on the side wall of the bolt is properly increased, so that the efficiency of punching holes on the balance weight can be effectively improved, and meanwhile, the depth of the threaded hole is deeper, so that a good meshing effect with the high-strength balance weight can be achieved.

Drawings

FIG. 1 is a perspective view of a self-tapping screw assembly for a high-strength counterweight according to the present utility model;

FIG. 2 is a side view of a self-tapping screw assembly for a high strength counterweight according to the present utility model;

FIG. 3 is a front view of the self-tapping screw assembly for a high-strength counterweight of the present utility model;

fig. 4 is a cross-sectional view of a flat gasket of the self-tapping screw assembly for a high-strength balance weight according to the present utility model.

Legend description:

1. a nut; 2. a flat gasket; 3. a bolt; 4. a thread; 5. and a through hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, one embodiment provided by the present utility model is: the self-tapping screw assembly for the high-strength balance weight comprises a nut 1, wherein the middle part of the rear end of the nut 1 is fixedly connected with a bolt 3, threads 4 are formed in the outer side of the bolt 3, a flat gasket 2 is sleeved at the position close to the front of the outer side of the bolt 3, a through hole 5 is formed in the middle of the flat gasket 2, the outer side of the bolt 3 is sleeved with the flat gasket 2 with a larger diameter, good limiting work can be achieved in the process of installing the balance weight, and meanwhile the effect of preventing the bolt 3 from loosening can be achieved when the bolt 3 is screwed down.

The blackening treatment is carried out on the outer side of the bolt 3, the hardness of the bolt 3 is 30-37HRC, the hardness of the bolt 3 is improved to 30-37HRC, so that the tapping screw has better strength, bending caused by lower hardness in the tapping process is prevented, the use cost is increased, the installation simplicity is effectively improved, the included angle between the end faces of the threads 4 is forty-five degrees, the diameter of the bolt 3 is 6.3mm, the diameter of the threads 4 is 9mm, the diameter of the through holes 5 is 7.3mm, and the pitch between the threads 4 is 4mm.

Working principle: the port of the bolt 3 is placed on the high-strength balance block, the nut 1 is rotated to open the hole of the balance block, and the efficiency of opening the hole can be effectively improved because the threads 4 on the side wall of the bolt 3 have larger depth, meanwhile, when the flat gasket 2 on the bolt 3 contacts the balance block, good limiting work can be performed on the balance block, and the bolt 3 can be effectively prevented from being bent because the bolt 3 has stronger hardness.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. Self-tapping screw subassembly for high strength balancing piece, including nut (1), its characterized in that: the nut is characterized in that a bolt (3) is fixedly connected to the middle of the rear end of the nut (1), threads (4) are formed in the outer side of the bolt (3), a flat gasket (2) is sleeved at the position, close to the front, of the outer side of the bolt (3), and a through hole (5) is formed in the middle of the flat gasket (2).

2. The self-tapping screw assembly for a high-strength counterweight according to claim 1, wherein: blackening treatment is carried out on the outer side of the bolt (3).

3. The self-tapping screw assembly for a high-strength counterweight according to claim 1, wherein: the hardness of the bolt (3) is 30-37HRC.

4. The self-tapping screw assembly for a high-strength counterweight according to claim 1, wherein: the included angle between the end faces of the threads (4) is forty-five degrees.

5. The self-tapping screw assembly for a high-strength counterweight according to claim 1, wherein: the diameter of the bolt (3) is 6.3mm.

6. The self-tapping screw assembly for a high-strength counterweight according to claim 1, wherein: the diameter of the thread (4) is 9mm.

7. The self-tapping screw assembly for a high-strength counterweight according to claim 1, wherein: the diameter of the through hole (5) is 7.3mm.

8. The self-tapping screw assembly for a high-strength counterweight according to claim 1, wherein: the pitch between the threads (4) is 4mm.