CN214742610U

CN214742610U - Novel iron plate supporting bolt

Info

Publication number: CN214742610U
Application number: CN202120930997.6U
Authority: CN
Inventors: 吴天延; 丁威; 杨超
Original assignee: Yichang Jinbao Music Instrument Manufacture Co ltd
Current assignee: Yichang Jinbao Music Instrument Manufacture Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-16
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses a novel iron plate supporting bolt, which comprises a bolt head, a machine thread section, a bolt body and a wood thread section; the bolt head, the machine thread section, the bolt body and the wood thread section are of an integrated structure; a first external thread is processed on the machine thread section; the machine thread section is in transition connection with the bolt body through the cylindrical section; the wood thread section is provided with a second external thread, and the end part of the wood thread section is provided with a sharp corner for self-tapping and drilling. This supporting bolt can be used for the support of piano spare part medium iron plate, and it can effectually prevent to take place not hard up defect, has guaranteed the reliability of connecting.

Description

Novel iron plate supporting bolt

Technical Field

The utility model relates to a piano technical field, concretely relates to novel iron plate support bolt.

Background

At present, the connecting strength of the domestic piano iron plate supporting bolt with an iron plate and a cup-shaped nut in the assembling process is low, the connecting effect with a back column, a back column auxiliary wood and other wooden parts is not ideal along with the change of time, and the piano iron plate supporting bolt is easy to loosen.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above-mentioned prior art not enough, provide a novel iron plate support bolt, this support bolt can be arranged in the support of piano spare part iron plate, and it can effectually prevent to take place not hard up defect, has guaranteed the reliability of connecting.

In order to realize the technical characteristics, the purpose of the utility model is realized as follows: the utility model provides a novel iron plate support bolt which characterized in that: the bolt comprises a bolt head, a machine thread section, a bolt body and a wood thread section; the bolt head, the machine thread section, the bolt body and the wood thread section are of an integrated structure; a first external thread is processed on the machine thread section; the machine thread section is in transition connection with the bolt body through the cylindrical section; the wood thread section is provided with a second external thread, and the end part of the wood thread section is provided with a sharp corner for self-tapping and drilling.

The bolt head is provided with a four-cone surface, and the end part of the bolt head is provided with a spherical surface; the four conical surfaces are matched with a socket wrench for driving the socket wrench to rotate.

The first external thread of the machine thread section is a common coarse thread, so that the machine thread section bears large tensile force and impact force.

The bolt body adopts a square structure; the square structure is matched with a common wrench.

The second external thread of the wood thread section is a large-pitch triangular thread.

And the bolt body and the wood thread section are in conical surface transition.

And the included angles C and D of the thread surfaces on the two sides of the triangular thread of the second external thread are different.

The utility model discloses there is following beneficial effect:

the bolt head of the utility model is provided with four conical surfaces, after the iron plate is assembled, a tuning wrench is directly selected for fine tuning when the code is adjusted and pressed at the later stage, and the top ends of the four conical surfaces are provided with spherical surfaces to play the role of strengthening the structure and the beautiful effect; the machine thread section is provided with common coarse thread external threads and is combined and connected with the iron plate and the cup-shaped nut to bear larger pulling force and impact force; the bolt body is equipped with four sides and under not influencing iron plate support atress prerequisite, and the ordinary spanner of being convenient for twists and adjusts the practicality strong, and the wood screw thread section is equipped with coarse pitch triangle screw thread, the front end is equipped with self tapping, drilling closed angle, can firmly inlay fast and go into among wooden pieces such as piano back of the body post, back of the body post pair wood, and be difficult to not hard up.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a right side view of the present invention.

Fig. 3 is a three-dimensional view of the present invention.

Fig. 4 is a view of the present invention from a in fig. 1.

Fig. 5 is a view B in fig. 1 according to the present invention.

Fig. 6 is a partial three-dimensional enlarged view of the bolt head of the present invention.

Fig. 7 is a partial three-dimensional enlarged view of the wood screw section of the present invention.

In the figure: 1-bolt head; 2-machine thread section; 3-a bolt body; 4-wood thread section; 5-spherical surface; 6-four conical surfaces; 7-square; 8-conical surface; 9-sharp corner; 10-cylindrical section.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1-7, a novel iron plate support bolt is characterized in that: the bolt comprises a bolt head 1, a machine thread section 2, a bolt body 3 and a wood thread section 4; the bolt head 1, the machine thread section 2, the bolt body 3 and the wood thread section 4 are of an integrated structure; a first external thread is processed on the machine thread section 2; the machine thread section 2 is in transition connection with the bolt body 3 through a cylindrical section 10; the wood thread section 4 is provided with a second external thread, and the end part of the wood thread section 4 is provided with a sharp angle 9 for self-tapping and drilling. This supporting bolt can be used for the support of piano spare part medium iron plate, and it can effectually prevent to take place not hard up defect, has guaranteed the reliability of connecting.

Further, the bolt head 1 is provided with a four-cone surface 6, and the end part of the bolt head 1 is provided with a spherical surface 5; the four conical surfaces 6 are matched with a socket wrench for driving the socket wrench to rotate. The structure is strong in practicability, the common socket wrench can be adjusted, and the spherical surface 5 has the strengthening effect and the attractive effect.

Furthermore, the first external thread of the machine thread section 2 is a common coarse thread, so that the machine thread section can bear large tensile force and impact force. Thereby ensuring the structural strength thereof.

Further, the bolt body 3 adopts a square structure 7; the square structure 7 is matched with a common wrench. The practicality is strong, and ordinary spanner can simply adjust.

Further, the second external thread of the wood thread section 4 is a large-pitch triangular thread. Can be quickly and firmly embedded into the wooden parts such as the back column, the back column auxiliary wood and the like of the piano

Furthermore, a conical surface 8 is adopted for transition between the bolt body 3 and the wood thread section 4.

Furthermore, the included angles C and D of the thread surfaces on two sides of the triangular thread of the second external thread are different. And the reliability of connection between the wood boards is ensured by adopting different angles.

The utility model discloses a theory of operation:

the utility model discloses, bolt head 1 is equipped with four conical surfaces 6 after the iron plate is assembled, directly select tuning spanner to finely tune when being convenient for later stage code modulation to press, four conical surfaces 6 top are equipped with sphere 5 and play the intensive structure effect and pleasing to the eye effect; the machine thread section 2 is provided with a common coarse thread external thread, and is combined and connected with an iron plate and a cup-shaped nut to bear larger pulling force and impact force; the bolt body 3 is equipped with four sides 7 and under not influencing supporting under the atress prerequisite to iron plate, and the ordinary spanner of being convenient for twists and adjusts the practicality strong, and wood screw thread section 4 is equipped with coarse pitch triangle screw thread, the front end is equipped with self tapping, drilling closed angle 9 can firmly inlay fast and go into wooden spare such as piano back of the body post, back of the body post pair wood, and be difficult to become flexible.

Claims

1. The utility model provides a novel iron plate support bolt which characterized in that: the bolt comprises a bolt head (1), a machine thread section (2), a bolt body (3) and a wood thread section (4); the bolt head (1), the machine thread section (2), the bolt body (3) and the wood thread section (4) are of an integrated structure; a first external thread is processed on the machine thread section (2); the machine thread section (2) is in transition connection with the bolt body (3) through a cylindrical section (10); the wood thread section (4) is provided with a second external thread, and the end part of the wood thread section (4) is provided with a sharp corner (9) for self-tapping and drilling.

2. The novel iron plate stay bolt as claimed in claim 1, wherein: the bolt head (1) is provided with a four-cone surface (6), and the end part of the bolt head (1) is provided with a spherical surface (5); the four conical surfaces (6) are matched with a socket wrench for driving the socket wrench to rotate.

3. The novel iron plate stay bolt as claimed in claim 1, wherein: the first external thread of the machine thread section (2) adopts a common coarse thread external thread, so that the machine thread section bears large tensile force and impact force.

4. The novel iron plate stay bolt as claimed in claim 1, wherein: the bolt body (3) adopts a square structure (7); the square structure (7) is matched with a common wrench.

5. The novel iron plate stay bolt as claimed in claim 1, wherein: the second external thread of the wood thread section (4) adopts a large-pitch triangular thread.

6. The novel iron plate stay bolt as claimed in claim 1, wherein: the bolt body (3) and the wood thread section (4) are transited by adopting a conical surface (8).

7. The novel iron plate stay bolt as claimed in claim 5, wherein: and the included angles C and D of the thread surfaces on the two sides of the triangular thread of the second external thread are different.