CN220668083U - Connecting bolt - Google Patents
Connecting bolt Download PDFInfo
- Publication number
- CN220668083U CN220668083U CN202322288524.2U CN202322288524U CN220668083U CN 220668083 U CN220668083 U CN 220668083U CN 202322288524 U CN202322288524 U CN 202322288524U CN 220668083 U CN220668083 U CN 220668083U
- Authority
- CN
- China
- Prior art keywords
- bolt
- connecting bolt
- rod section
- screw
- polish rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims description 22
- 238000005470 impregnation Methods 0.000 claims description 8
- 230000003746 surface roughness Effects 0.000 claims description 5
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 4
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 229910001325 element alloy Inorganic materials 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 description 8
- 239000002253 acid Substances 0.000 description 5
- 239000003595 mist Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010301 surface-oxidation reaction Methods 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 aluminum compound Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Abstract
The utility model discloses a connecting bolt, which relates to the technical field of connecting fasteners and comprises a bolt body, wherein the bolt body comprises a screw rod and a bolt head fixedly connected with one end of the screw rod; the screw rod includes polished rod section and screw thread section in proper order along the direction that deviates from the bolt head, and polished rod section outer peripheral face is provided with the wearing layer, and the surface of bolt head and screw thread section coats and is equipped with the anticorrosive coating. The connecting bolt provided by the utility model can prolong the service life of the connecting bolt.
Description
Technical Field
The utility model relates to the technical field of connecting fasteners, in particular to a connecting bolt.
Background
The connecting bolt is used as a common connecting fastener, and usually the connecting bolt needs to ensure enough strength and service life in the use process, and especially needs to ensure the wear resistance of the polished rod section, otherwise, the polished rod section cannot keep effective interference fit with the connecting pair, and the connecting pair can loose in advance or break to fail. The square-head hinged hole coupling bolt provided by the patent CN204942214U is easy to wear after being used for a period of time, and the whole service life of the bolt is influenced; in addition, if the outer surfaces of the bolt head and the thread section outside the polish rod section are subjected to common surface oxidation treatment, the corrosion resistance of the bolt in a non-oily dry-state use environment after storage or installation is poor, and especially in working environments such as high temperature, humidity, acid mist or ultraviolet rays, the overall corrosion resistance of the bolt is poorer, and the bolt is easier to corrode, so that the overall service life of the bolt is influenced.
Disclosure of Invention
The utility model aims to provide a connecting bolt which solves the problems in the prior art, can improve the wear resistance and corrosion resistance of the connecting bolt and prolongs the service life of the connecting bolt.
In order to achieve the above object, the present utility model provides the following solutions:
the utility model provides a connecting bolt which comprises a bolt body, wherein the bolt body comprises a screw rod and a bolt head fixedly connected with one end of the screw rod; the screw rod sequentially comprises a polished rod section and a thread section along the direction deviating from the bolt head, and the outer circumferential surface of the polished rod section is provided with a wear-resistant layer; and the outer surfaces of the bolt head and the thread section are covered with an anti-corrosion layer.
Preferably, an arc-shaped groove is arranged at the joint of the polish rod section and the bolt head.
Preferably, a tool retracting groove is formed at the joint of the polish rod section and the thread section.
Preferably, the surface roughness of the bolt head near the supporting end face of the screw and the screw does not exceed rz1.6.
Preferably, the diameter of the polish rod section is larger than the major diameter of the threaded section.
Preferably, the outer surfaces of the bolts except the polish rod section are all covered with the anti-corrosion layer.
Preferably, the anticorrosive layer adopts any one of zinc-aluminum composite coating, mechanical zinc-impregnation coating or multi-element alloy co-impregnation coating.
Preferably, the bolt body is made of alloy steel.
Preferably, the thickness of the wear-resistant layer is 1.6mm-2.2mm, and the Rockwell hardness of the wear-resistant layer is HRC 53-58.
Compared with the prior art, the utility model has the following technical effects:
in actual use, the most easily worn and failed position of the connecting bolt is a polish rod section in contact fit with the connecting pair; compared with the connecting bolt without the wear-resistant layer in the conventional polish rod section, the connecting bolt provided by the utility model has the advantages that the wear-resistant layer is arranged on the peripheral surface of the polish rod section, so that the wear resistance of the polish rod section can be improved; meanwhile, the outer surface of the connecting bolt except the polish rod section is coated with the anti-corrosion layer, compared with the surface of the bolt head and the threaded section outside the polish rod section of the conventional connecting bolt, only conventional oxidation blackening treatment is carried out, the anti-corrosion layer arranged on the threaded section and the bolt head of the connecting bolt can improve the anti-corrosion performance of the connecting bolt no matter in storage or use, and especially can improve the anti-corrosion performance of the connecting bolt under severe working environments such as high temperature, humidity, acid mist or ultraviolet rays, so that the comprehensive service life of the connecting bolt is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a connecting bolt according to a first embodiment;
fig. 2 is a schematic left view of a connecting bolt according to the first embodiment.
Icon: 1-a bolt body; 11-screw; 12-a bolt head; 111-polish rod sections; 112-thread segments; 13-arc grooves; 14-tool retracting groove.
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.
The utility model aims to provide a connecting bolt which solves the problems in the prior art and can prolong the service life of the connecting bolt.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
Example 1
The present embodiment provides a connecting bolt, which includes a bolt body 1, please refer to fig. 1 and 2, the bolt body 1 includes a screw 11 and a bolt head 12 fixedly connected with one end of the screw 11; the screw 11 sequentially comprises a polish rod section 111 and a thread section 112 along the direction deviating from the bolt head 12, the outer peripheral surface of the polish rod section 111 is provided with a wear-resistant layer, and the outer surfaces of the bolt head 12 and the thread section 112 are covered with an anti-corrosion layer.
In the working state, if the surface hardness of the polish rod section 111 is lower than or similar to the surface hardness of the connection pair, the outer surface of the polish rod section 111 is easy to wear due to the synchronous motion of the contact surface of the polish rod section 111 and the connection pair according to friction mechanics, so that a wear-resistant layer is arranged on the outer peripheral surface of the polish rod section 111 to improve the wear resistance of the polish rod section 111, and meanwhile, in order to improve the corrosion resistance of the connecting bolt in the storage and use process, particularly the corrosion resistance in severe environments such as high temperature, humidity, acid mist and ultraviolet rays, the other positions of the connecting bolt except the polish rod section 111 are coated with zinc and aluminum compound check corrosion-resistant layers, so that the wear resistance, corrosion resistance, durability and durability of the connecting bolt are improved.
Further preferably, the screw 11 and the bolt head 12 are made of alloy steel, such as medium carbon Cr and Mo alloy steel 42CrMo, and the wear-resistant layer is formed by surface hardening the surface of the polished rod section 111.
Further preferably, the thickness of the surface wear layer may be 1.6mm-2.2mm and the Rockwell hardness of the wear layer may be HRC 53-58, in particular the thickness and Rockwell hardness values may be determined according to the requirements of use.
Further preferably, the diameter of the polish rod section 111 is larger than the large diameter of the threaded section 112, so that the polish rod section 111 and the hole of the connecting pair achieve expected interference fit, and positioning is achieved.
Further preferably, the anticorrosion layer adopts any one of zinc-aluminum composite coating, mechanical zinc-impregnation coating or multi-element alloy co-impregnation coating for surface anticorrosion treatment, so that the anticorrosion performance of the screw head 12 and the screw thread section 112 in storage or working environment, particularly in high-temperature, humid, acid mist or ultraviolet working environment and the like can be effectively improved; compared with the conventional surface oxidation blackening layer, the zinc-aluminum composite coating or the mechanical zinc-impregnation coating or the multi-element alloy co-impregnation coating has better corrosion resistance; in addition, the material of the anti-corrosion layer is not limited to the coating made of the above material, and other material coatings capable of improving the anti-corrosion performance can be used.
In the alternative scheme of the embodiment, preferably, an arc groove 13 is arranged at the joint of the polish rod section 111 and the bolt head 12, specifically, the arc groove 13 can be an arc groove with an R angle of not less than 1mm, so that the contact surface of the connecting pair can be tightly attached when the connecting bolt is installed, and the connecting pair is prevented from loosening in advance in the service environment of continuous vibration and alternating load; and the outer peripheral surface of the arc-shaped groove 13 is also covered with an anti-corrosion layer, so that the anti-corrosion performance is improved.
Further preferably, the structure of the arc groove 13 is arranged to ensure that the bolt head 12 is close to the supporting end face of the screw 11 and the surface roughness of the screw 11 is not more than rz1.6, namely, the surface roughness of the bolt head 12 close to the supporting end face of the screw 11 section and the screw 11 is not more than rz1.6, so that the connection bolt can be tightly attached to the contact face of the connection pair during installation, and the connection pair is prevented from loosening in advance in the service environment of continuous vibration and alternating load.
In the alternative of this embodiment, preferably, the joint of the polish rod section 111 and the thread section 112 is provided with a tool retracting groove 14; specifically, the polish rod section 111 is connected with the thread section 112 through a relief groove 14 with the length not less than 4mm and the outer diameter equal to the middle diameter of the thread section 112, so that safe relief or relief from the relief groove 14 and the arc-shaped groove 13 is ensured when the polish rod section 111 is processed to be a wear-resistant layer and surface roughness is processed, effective isolation between the polish rod section 111 and the thread section 112 and the bolt head 12 is realized, and hardness of the thread section 112 and the bolt head 12 is not influenced when the surface of the polish rod section 111 is hardened.
Further preferably, the outside of the tool retracting groove 14 is also covered with an anti-corrosion layer, so that the overall anti-corrosion performance of the bolt in storage, particularly in high-temperature, humid, acid mist or ultraviolet working environments, is improved. And the arc-shaped groove 13 and the tool withdrawal groove 14 are made of medium carbon alloy steel, such as 42CrMo, so that the overall strength of the connecting bolt is ensured, the service life of the connecting bolt is prolonged, the maintenance and effective use period is prolonged, the energy consumption and the material consumption are reduced, and the resources are saved.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the utility model.
Claims (8)
1. Connecting bolt, including bolt body (1), its characterized in that: the bolt body (1) comprises a screw (11) and a bolt head (12) fixedly connected with one end of the screw (11); the screw (11) sequentially comprises a polish rod section (111) and a thread section (112) along the direction deviating from the bolt head (12), and the outer peripheral surface of the polish rod section (111) is provided with a wear-resistant layer; and the outer surfaces of the bolt head (12) and the thread section (112) are covered with an anti-corrosion layer.
2. The connecting bolt according to claim 1, wherein: an arc-shaped groove (13) is formed at the joint of the polish rod section (111) and the bolt head (12).
3. The connecting bolt according to claim 1, wherein: and a tool retracting groove (14) is formed at the joint of the polish rod section (111) and the thread section (112).
4. The connecting bolt according to claim 1, wherein: the bolt head (12) is close to the supporting end face of the screw (11) and the surface roughness of the screw (11) is not more than Rz1.6.
5. The connecting bolt according to claim 1, wherein: the diameter of the polish rod section (111) is larger than the large diameter of the thread section (112).
6. The connecting bolt according to claim 1, wherein: the anticorrosive layer adopts any one of zinc-aluminum composite coating, mechanical zinc-impregnation coating or multi-element alloy co-impregnation coating.
7. The connecting bolt according to claim 1, wherein: the bolt body (1) is made of alloy steel.
8. The connecting bolt according to claim 1, wherein: the thickness of the wear-resistant layer is 1.6mm-2.2mm, and the Rockwell hardness of the wear-resistant layer is HRC 53-58.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322288524.2U CN220668083U (en) | 2023-08-25 | 2023-08-25 | Connecting bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322288524.2U CN220668083U (en) | 2023-08-25 | 2023-08-25 | Connecting bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220668083U true CN220668083U (en) | 2024-03-26 |
Family
ID=90353238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322288524.2U Active CN220668083U (en) | 2023-08-25 | 2023-08-25 | Connecting bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220668083U (en) |
-
2023
- 2023-08-25 CN CN202322288524.2U patent/CN220668083U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |