CN214661389U - Automatic pilot bolt - Google Patents
Automatic pilot bolt Download PDFInfo
- Publication number
- CN214661389U CN214661389U CN202021872590.4U CN202021872590U CN214661389U CN 214661389 U CN214661389 U CN 214661389U CN 202021872590 U CN202021872590 U CN 202021872590U CN 214661389 U CN214661389 U CN 214661389U
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- section
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Abstract
The utility model relates to an automatic lead positive bolt, including the bolt body, the bolt body includes cylinder direction section, transition screw section and normal screw section, and cylinder direction section, transition screw section and normal screw section set gradually on the bolt body from the head of bolt body, and the screw thread of transition screw section is followed cylinder direction section and is gradually gone to normal screw section. The length of the transition thread segment is 1 to 4 thread lengths. The head of the bolt is designed into a structure with a cylindrical and gradually-changed thread, so that automatic correction is realized, and thread damage in the bolt tightening process is effectively avoided.
Description
Technical Field
The utility model relates to a bolt, especially an automatic lead positive bolt.
Background
The bolt body is covered with normal screw thread for current bolt, and the screw thread on the bolt is for all being unanimous from beginning to end external diameter that targets in place promptly, so current bolt head corresponds the screw hole and often can not target in place in the installation for the bolt often can the slope appear in the tightening process, leads to the screw hole to damage, leads to the economic loss for manufacturing enterprise.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the utility model provides an automatic lead positive bolt, avoid the bolt tightening process because of the slope lead to the condition that the screw hole damaged.
The technical scheme for solving the technical problems is as follows: the utility model provides an automatic lead positive bolt, includes the bolt body, and the bolt body includes cylinder direction section, transition screw thread section and normal screw thread section, and cylinder direction section, transition screw thread section and normal screw thread section set gradually on the bolt body from the head of bolt body, and the screw thread of transition screw thread section arrives normal screw thread section from cylinder direction section gradually.
The utility model discloses a further technical scheme is: the length of the transition thread segment is 1 to 4 thread lengths.
The length of the cylindrical guide section is 1 to 4 thread lengths.
Due to the adoption of the technical scheme, the utility model relates to an automatic lead positive bolt has following beneficial effect:
the utility model discloses the head of well bolt designs into the structure that the cylinder adds the gradual change screw thread, can conveniently guide into the bolt hole when the installation, avoids the screw thread position of the screw thread on the bolt at first in the bolt hole not to correspond and produces crooked, because the bolt head is equipped with the cylinder direction section that is not equipped with the screw thread, this cylinder direction section very easily just can be just rightly on the cover nut, has restricted the space of nut slope, realizes leading automatically, effectively avoids bolt tightening process screw thread to damage.
The technical features of an automatic pilot bolt according to one embodiment of the present invention will be further described with reference to the drawings and the specific embodiments.
Drawings
FIG. 1: the utility model relates to an automatic lead positive bolt's schematic structure.
In the above drawings, the respective reference numerals are explained as follows:
1-cylindrical guide section, 2-transition thread section and 3-normal thread.
Detailed Description
An automatic pilot bolt comprises a bolt body, the bolt body comprises a cylindrical guide section 1, a transition thread section 2 and a normal thread section 3, the cylindrical guide section 1, the transition thread section 2 and the normal thread section 3 are sequentially arranged on the bolt body from the head part of the bolt body, the thread of the transition thread section 2 gradually changes from the cylindrical guide section 1 to the normal thread section 3, namely, the cylindrical guide section 1 is positioned at the head part of the bolt body, the normal thread section 3 is positioned at the tail part of the bolt body, the transition thread section 2 is positioned between the cylindrical guide section 1 and the normal thread section 3, the cylindrical guide section 1 is a cylindrical guide section without threads, the normal thread section 3 is a conventional thread section, the thread outer diameter of the transition thread section 2 is gradually changed from the normal thread small diameter to the normal thread outer diameter, i.e. the thread of the transition thread segment 2 is gradually increased from the outer diameter of the cylindrical guide segment 1 to the thread outer diameter of the normal thread segment 3. The length of the transition thread segment 2 is 1 to 4 thread lengths. The length of the cylindrical guide section 1 is 1 to 4 thread lengths.
The specific embodiment is as follows: as shown in figure 1, the cylindrical guide section 1 is located at the head of the bolt, the cylindrical guide section 1 is connected with the transition thread section 2, the thread outer diameter of the transition thread section is gradually changed from the normal thread small diameter to the normal thread outer diameter, the length of the transition thread section is 4 thread lengths, and the transition thread section is connected with the normal thread section 3.
Claims (3)
1. The utility model provides an automatic lead positive bolt, includes the bolt body, its characterized in that: the bolt body includes cylinder direction section, transition screw section and normal screw section, and cylinder direction section, transition screw section and normal screw section set gradually on the bolt body from the head of bolt body, and the screw thread of transition screw section is followed cylinder direction section gradually to normal screw section, and the external diameter of the screw thread of transition screw section is from normal screw thread path gradual change to normal external diameter of the screw thread.
2. The self-righting bolt of claim 1, wherein: the length of the transition thread segment is 1 to 4 thread lengths.
3. The self-righting bolt of claim 1, wherein: the length of the cylindrical guide section is 1 to 4 thread lengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021872590.4U CN214661389U (en) | 2020-08-31 | 2020-08-31 | Automatic pilot bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021872590.4U CN214661389U (en) | 2020-08-31 | 2020-08-31 | Automatic pilot bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214661389U true CN214661389U (en) | 2021-11-09 |
Family
ID=78443828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021872590.4U Active CN214661389U (en) | 2020-08-31 | 2020-08-31 | Automatic pilot bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214661389U (en) |
-
2020
- 2020-08-31 CN CN202021872590.4U patent/CN214661389U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |