CN103133474A

CN103133474A - Bolt

Info

Publication number: CN103133474A
Application number: CN201110372725XA
Authority: CN
Inventors: 陆建平
Original assignee: SUZHOU INDUSTRIAL PARK XIECHENG PRECISION HARDWARE Co Ltd
Current assignee: SUZHOU INDUSTRIAL PARK XIECHENG PRECISION HARDWARE Co Ltd
Priority date: 2011-11-22
Filing date: 2011-11-22
Publication date: 2013-06-05

Abstract

The invention relates to a bolt. The bolt comprises a bolt body, wherein the bolt body comprises a head portion, a screw, first threads and a conic portion, wherein the head portion extends from the bottom surface to form the screw, the first threads are formed on the periphery of the screw, and the conic portion is formed at the bottom of the screw. The bolt further comprises a lengthening portion which can be assembled on the conic portion. The lengthening portion comprises a lengthening screw, second threads, a lengthening conic portion and an installation portion, wherein the second threads are formed on the periphery of the lengthening screw, the second threads and the first threads form coherent threads, the lengthening conic portion is formed at one end of the lengthening screw, the installation portion is formed at the other end of the lengthening screw and used for being matched and fixed with the conic portion, the installation portion is concave inward and formed in the lengthening screw, and the conic portion is fixed in the installation portion. According to the bolt, due to the fact that the lengthening portion is fixed on the conic portion, the length of a normal screw can be increased randomly and the bolt is wide in application range.

Description

Screw

Technical field

The present invention relates to a kind of screw.

Background technique

Screw is a kind of fastening piece commonly used in daily life and industry, at present in use, generally to select the screw of different model to fix according to the different parameters such as spiro rod length size, because its spiro rod length is fixed during fabrication, when needing in use to use the screw of different spiro rod lengths in a large number, need to first arrange out before the screw of different spiro rod lengths, this kind mode is cumbersome, and it needs again the screw of some particular length in some special occasion sometimes, if the screw that goes to produce separately this kind particular length namely takes a lot of trouble effort again.

Summary of the invention

The object of the present invention is to provide a kind of screw that can freely realize extending spiro rod length.

for realizing aforementioned purpose, the present invention adopts following technological scheme: a kind of screw, comprise the screw body, described screw body comprises a head, extend to form a screw rod from described head bottom surface, be formed at the first screw thread of described screw rod outer rim, and the tapering that is formed at described screw rod bottom, described screw also comprises the growth section that can be assembled in described tapering, described growth section comprises that one increases screw rod, be formed at described growth screw rod outer rim and form the second screw thread of continuity screw thread with the first screw thread, from the growth tapering that described growth screw rod one end forms, and be formed at described growth screw rod one end and be used for the assembly department that is fixed with the tapering, described assembly department inner concave shape is formed in and increases in screw rod, described tapering is fixed in described assembly department.

As a further improvement on the present invention, be formed with outside thread on the outer rim of described tapering, be formed with the internal thread that coordinates with described tapering in described assembly department.

As a further improvement on the present invention, described outside thread is identical with the thread rotary orientation of the first screw thread.

As a further improvement on the present invention, described outside thread is identical with the tooth spacing of the first screw thread.

As a further improvement on the present invention, described growth tapering be formed with outside thread just as the second outside thread.

The present invention can arbitrarily increase the length of common screw by fixing growth section on the tapering, and applicability is wide.

Description of drawings

Fig. 1 is the structural representation of screw and growth section in the specific embodiment of the invention.

Fig. 2 is the ssembly drawing of screw and growth section in Fig. 1.

Fig. 3 is the forming method of screw in the specific embodiment of the invention.

Embodiment

Please refer to Fig. 1,2, a kind of screw, comprise screw body 1 and be assembled in the growth section 2 of this screw body 1 bottom, screw body 1 comprises a head 11, a screw rod 12 that extends to form from head 11 bottom surfaces, is formed at the first screw thread 13 of screw rod 11 outer rims and the tapering 14 that is formed at screw rod 12 bottoms.This growth section 2 is assembled on tapering 14, is removable the connection between growth section 2 and tapering 14, when screw body 1 needs to increase, can with should growth section 2 be fixed on tapering 14, extend screw rod 12.Growth section 2 comprises and one increases screw rod 21, is formed to increase screw rod 21 outer rims and form the second screw thread 22 of continuity screw threads, self-propagation screw rod 21 1 ends form growth tapering 23 with the first screw thread 13 and be formed at and increases screw rod 21 the other ends and be used for the assembly department 24 that is fixed with tapering 14, assembly department 24 inner concave shape are formed in and increase in screw rod 21, and tapering 14 is fixed in assembly department 24.Because this second screw thread 22 is identical with the parameter of the first screw thread 13, when growth section 2 with after screw body 1 is fixedly connected with (namely, tapering 14 rotations are fixed in assembly department 24), the second screw thread 22 and the first screw thread 13 form the screw thread of a continuity, when concrete the use, what form due to both screw thread is continuity, therefore can not produce the screw thread phenomenon of rupture, the problem that impact is installed.

On the connectivity problem of tapering 14 and assembly department 24, in this accompanying drawing, what both adopted is to be threaded, form outside thread 141 on 14 outer rims of tapering, the internal thread 241 that the interior formation of assembly department 24 coordinates with outside thread 141 is in order to realize the first screw thread 13 and the continuity of the second screw thread 22 on screw thread, described outside thread 141 is identical with the tooth spacing of the first screw thread 13, and when installing and using, in order to prevent that when installing or dismantle, outside thread 141 is identical with the thread rotary orientation of the first screw thread 13.In addition, can also be formed with second outside thread 231 identical with outside thread 141 parameters increasing tapering 23, a plurality of growth section 2 is assembled in a plurality of stacks that so just can be random, adds the length of long bolt.

Please refer to Fig. 3, be the forming step of above-mentioned screw:

S1: get screw, this screw can be plain screw, and its screw forming method can adopt forming method commonly used;

S2: form outside thread on the tapering of screw;

S3: make the growth screw rod and form the second screw thread, get stock and be made into the growth screw rod, then increase the screw rod outer rim at this and form the second screw thread, this second screw thread is after increasing the assembling of screw rod and screw, and the screw thread on the second screw thread and screw outer rim forms the continuity screw thread;

S4: form assembly department, an end indent that increases screw rod is offered the internal thread that coordinates with outside thread on the tapering.

S5: form the second outside thread, will increase the screw rod the other end and make and increase the tapering, increase formation the second outside thread on the tapering at this, the described second externally threaded thread parameter is identical with the external thread parameter in described screw tapering.

In above-mentioned steps S2 and S4, no longer prepare outside thread on the tapering of screw and form internal thread in assembly department, adopting other Placements to coordinate tapering and assembly department, for the ease of preparation, described outside thread is identical with the thread rotary orientation of screw, and described outside thread is identical with the tooth spacing of screw.

Although be the example purpose, the preferred embodiment of the present invention is disclosed, but those of ordinary skill in the art will recognize, in the situation that do not break away from by the disclosed scope and spirit of the present invention of appending claims, various improvement, increase and replacement are possible.

Claims

1. screw, comprise screw body (1), described screw body (1) comprises a head (11), extend to form a screw rod (12) from described head (11) bottom surface, be formed at first screw thread (13) of described screw rod (11) outer rim, and the tapering (14) that is formed at described screw rod (12) bottom, it is characterized in that: described screw also comprises the growth section (2) that can be assembled in described tapering (14), described growth section (2) comprises that one increases screw rod (21), be formed at described growth screw rod (21) outer rim and form second screw thread (22) of continuity screw thread with the first screw thread (13), from the growth tapering (23) that described growth screw rod (21) one ends form, and be formed at described growth screw rod (21) the other end and be used for the assembly department (24) that is fixed with tapering (14), described assembly department (24) inner concave shape is formed in and increases in screw rod (21), described tapering (14) is fixed in described assembly department (24).

2. a kind of screw according to claim 1, it is characterized in that: be formed with outside thread (141) on the outer rim of described tapering (14), be formed with the internal thread (241) that coordinates with described outside thread (141) in described assembly department (24).

3. a kind of screw according to claim 2, it is characterized in that: described outside thread (141) is identical with the thread rotary orientation of the first screw thread (13).

4. a kind of screw according to claim 2, it is characterized in that: described outside thread (141) is identical with the tooth spacing of the first screw thread (13).

5. a kind of screw according to claim 2, it is characterized in that: described growth tapering (23) is formed with second outside thread (231) identical with outside thread (141) parameter.