CN202431725U - Bolt connection structure for preventing aluminum alloy galvanic corrosion - Google Patents
Bolt connection structure for preventing aluminum alloy galvanic corrosion Download PDFInfo
- Publication number
- CN202431725U CN202431725U CN2011205190254U CN201120519025U CN202431725U CN 202431725 U CN202431725 U CN 202431725U CN 2011205190254 U CN2011205190254 U CN 2011205190254U CN 201120519025 U CN201120519025 U CN 201120519025U CN 202431725 U CN202431725 U CN 202431725U
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- CN
- China
- Prior art keywords
- aluminum alloy
- bolt
- load
- gasket
- plate
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a bolt connection structure for preventing aluminum alloy galvanic corrosion, including shank of bolt (1), shank of bolt (1) passes the mounting hole on aluminum alloy upper plate (8) and aluminum alloy hypoplastron (9), and is fixed through nut (3), the joint position between bolt head (2) and aluminum alloy upper plate (8) is provided with load upper gasket (4), and the joint position between nut (3) and aluminum alloy hypoplastron (9) is provided with load lower gasket (5), and the ring overcoat of load upper gasket (4) has anodic corrosion upper gasket (6), and the ring overcoat of load lower gasket (5) has anodic corrosion lower gasket (7), the utility model discloses increased upper and lower load gasket and upper and lower anodic corrosion gasket on current aluminum alloy bolted connection structure's basis, kept apart the metal of these two kinds of different electrode potentials of aluminum alloy part steel and bolt, effectively prevented that the aluminum alloy from taking place galvanic corrosion in bolt hole department, the service life is prolonged.
Description
Technical field
The utility model relates to a kind of bolt fastening structure, relates in particular to a kind of bolt fastening structure that prevents the aluminium alloy electric thermogalvanic corrision, belongs to technical field of fastening.
Background technique
The application of aluminum alloy on automobile increases gradually; When connecting, possibly adopt bolt fastening structure; In order to guarantee join strength, must select Steel Bolt for use, because the electrode potential of steel is higher than aluminum alloy; Have under the situation of aggressive medium galvanic corrosion will take place; Be that the metal of these two kinds of different electric electrode potentials of aluminium alloy part and Steel Bolt is in to be in contact with one another in the aggressive medium and can causes electrochemical corrosion, thereby make aluminum alloy that stress corrosion even cracking take place at the bolt hole place, have a strong impact on the quality safety of automobile.
Like Chinese utility model patent notification number: 201461703U; Open day: the utility model patent on May 12nd, 2010 disclosed a kind of securing means that prevents screw threads for fastening contact corrosion; This device includes bolt or double-screw bolt, nut, following separation sleeve, goes up separation sleeve and isolation pad; The small end of following separation sleeve and last separation sleeve is put into to become in the attachment hole of connected magnesium alloy component and other alloy component and is connected movingly; Isolation pad is placed on and becomes contact to connect between connected magnesium alloy component and other alloy component; And make the last separation sleeve of putting into connected magnesium alloy component attachment hole endoporus, isolation pad attachment hole and put into the endoporus centering of the following separation sleeve of connected other alloy component attachment hole, nut is tightened on the bolt that from separation sleeve down and last separation sleeve endoporus, passes and becomes fixed connection.But the separation sleeve complex structure that this device adopts, manufacture cost is higher, and is not easy to install and change.
Summary of the invention
The purpose of the utility model is defective and the deficiency that galvanic corrosion takes place at the bolt hole place to existing aluminum alloy easily; Provide a kind of simple in structure; Easy for installation; Be convenient to maintenance and replacing, can prevent effectively that aluminum alloy from the bolt fastening structure that prevents the aluminium alloy electric thermogalvanic corrision of galvanic corrosion taking place at the bolt hole place.
For realizing above-mentioned purpose, the technical solution of the utility model is: prevent the bolt fastening structure of aluminium alloy electric thermogalvanic corrision, comprise bolt shank; One end of bolt shank is a bolt head; The other end of bolt shank offers outside thread, and bolt shank passes the mounting hole on aluminum alloy upper plate and the aluminum alloy lower plate, and fixes through nut; Binding site between said bolt head and the aluminum alloy upper plate is provided with the load Upper gasket; Binding site between nut and the aluminum alloy lower plate is provided with the load lower levelling plate, and the ring of load Upper gasket is with the anodic attack Upper gasket outward, and the ring of load lower levelling plate is with the anodic attack lower levelling plate outward.
The diameter of bore of said anodic attack Upper gasket is less than the diameter of bolt head, and greater than the diameter of bolt shank.
The diameter of bore of said anodic attack lower levelling plate is less than the diameter of nut, and greater than the diameter of bolt shank.
The thickness of said anodic attack Upper gasket is higher 0.1 millimeter-0.5 millimeter than the thickness of load Upper gasket, and the thickness of anodic attack lower levelling plate is higher 0.1 millimeter-0.5 millimeter than the thickness of load lower levelling plate.
The beneficial effect of the utility model is:
1. the utility model has increased load pad and anodic attack pad up and down up and down on the basis of existing aluminum alloy bolt fastening structure; The metal of aluminium alloy part and these two kinds of different electric electrode potentials of Steel Bolt is kept apart, prevent that effectively aluminum alloy from galvanic corrosion taking place at the bolt hole place.
2. the utility model is simple in structure, and it is convenient to install and change, and through the isolation of anodic attack pad and bolt up and down, has prevented that aluminum alloy from getting galvanic corrosion, has prolonged working life, and fastening effective.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: bolt shank 1, bolt head 2, nut 3, load Upper gasket 4, load lower levelling plate 5, anodic attack Upper gasket 6, anodic attack lower levelling plate 7, aluminum alloy upper plate 8, aluminum alloy lower plate 9.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is done further to describe in detail.
Referring to Fig. 1, the bolt fastening structure that prevents the aluminium alloy electric thermogalvanic corrision of the utility model comprises bolt shank 1; One end of bolt shank 1 is a bolt head 2; The other end of bolt shank 1 offers outside thread, and bolt shank 1 passes the mounting hole on aluminum alloy upper plate 8 and the aluminum alloy lower plate 9, and fixing through nut 3; Binding site between said bolt head 2 and the aluminum alloy upper plate 8 is provided with load Upper gasket 4; Binding site between nut 3 and the aluminum alloy lower plate 9 is provided with load lower levelling plate 5, and the ring of load Upper gasket 4 is with anodic attack Upper gasket 6 outward, and the ring of load lower levelling plate 5 is with anodic attack lower levelling plate 7 outward.
The diameter of bore of said anodic attack Upper gasket 6 is less than the diameter of bolt head 2, and greater than the diameter of bolt shank 1.
The diameter of bore of said anodic attack lower levelling plate 7 is less than the diameter of nut 3, and greater than the diameter of bolt shank 1.
The thickness of said anodic attack Upper gasket 6 is higher 0.1 millimeter-0.5 millimeter than the thickness of load Upper gasket 4, and the thickness of anodic attack lower levelling plate 7 is higher 0.1 millimeter-0.5 millimeter than the thickness of load lower levelling plate 5.
One end of bolt shank 1 is a bolt head 2, and the other end of bolt shank 1 offers outside thread, and bolt shank 1 passes the mounting hole on aluminum alloy upper plate 8 and the aluminum alloy lower plate 9, and fixing through nut 3.Binding site between bolt head 2 and the aluminum alloy upper plate 8 is provided with load Upper gasket 4; Binding site between nut 3 and the aluminum alloy lower plate 9 is provided with load lower levelling plate 5; The ring of load Upper gasket 4 is with anodic attack Upper gasket 6 outward, and the ring of load lower levelling plate 5 is with anodic attack lower levelling plate 7 outward.
The diameter of bore of anodic attack Upper gasket 6 is less than the diameter of bolt head 2, and greater than the diameter of bolt shank 1, to guarantee that bolt head 2 can compress anodic attack Upper gasket 6.The diameter of bore of same anodic attack lower levelling plate 7 is less than the diameter of nut 3, and greater than the diameter of bolt shank 1, to guarantee that nut 3 can compress anodic attack lower levelling plate 7.Anodic attack Upper gasket 6 is identical with the structure of anodic attack lower levelling plate 7, and its thickness all is higher than load Upper gasket 4 and 50.2 millimeters-0.8 millimeter of load lower levelling plate, makes it under the situation of tightening, can be fixed.
Load Upper gasket 4 does not bear the bolt axial force with load lower levelling plate 5, and anodic attack Upper gasket 6 is selected low potential metal for use with anodic attack lower levelling plate 7, like zinc alloy or magnesium alloy.Because coupling rate is little, can select the Dimensions of anodic attack Upper gasket 6 and anodic attack lower levelling plate 7 according to design life, make to guarantee that before motor vehicle liquidation there are enough corrosion allowances in this pad.The metal of aluminium alloy part and these two kinds of different electric electrode potentials of Steel Bolt is kept apart through anodic attack Upper gasket 6 and anodic attack lower levelling plate 7, effectively prevent the galvanic corrosion of aluminum alloy.Under this kind linkage structure, as have aggressive medium such as rainwater, anodic attack Upper gasket 6 and anodic attack lower levelling plate 7 become the anode of corrosion cell, and aluminum alloy and bolt are protected as negative electrode and do not corroded, and have prolonged working life.
Claims (4)
1. prevent the bolt fastening structure of aluminium alloy electric thermogalvanic corrision; Comprise bolt shank (1); One end of bolt shank (1) is bolt head (2); The other end of bolt shank (1) offers outside thread, and bolt shank (1) passes the mounting hole on aluminum alloy upper plate (8) and the aluminum alloy lower plate (9), and fixing through nut (3); It is characterized in that: the binding site between said bolt head (2) and the aluminum alloy upper plate (8) is provided with load Upper gasket (4); Binding site between nut (3) and the aluminum alloy lower plate (9) is provided with load lower levelling plate (5), and the ring of load Upper gasket (4) is with anodic attack Upper gasket (6) outward, and the ring of load lower levelling plate (5) is with anodic attack lower levelling plate (7) outward.
2. the bolt fastening structure that prevents the aluminium alloy electric thermogalvanic corrision according to claim 1 is characterized in that: the diameter of bore of said anodic attack Upper gasket (6) is less than the diameter of bolt head (2), and greater than the diameter of bolt shank (1).
3. the bolt fastening structure that prevents the aluminium alloy electric thermogalvanic corrision according to claim 1 is characterized in that: the diameter of bore of said anodic attack lower levelling plate (7) is less than the diameter of nut (3), and greater than the diameter of bolt shank (1).
4. the bolt fastening structure that prevents the aluminium alloy electric thermogalvanic corrision according to claim 1; It is characterized in that: the thickness of said anodic attack Upper gasket (6) is higher 0.1 millimeter-0.5 millimeter than the thickness of load Upper gasket (4), and the thickness of anodic attack lower levelling plate (7) is higher 0.1 millimeter-0.5 millimeter than the thickness of load lower levelling plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205190254U CN202431725U (en) | 2011-12-13 | 2011-12-13 | Bolt connection structure for preventing aluminum alloy galvanic corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205190254U CN202431725U (en) | 2011-12-13 | 2011-12-13 | Bolt connection structure for preventing aluminum alloy galvanic corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431725U true CN202431725U (en) | 2012-09-12 |
Family
ID=46781172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205190254U Expired - Lifetime CN202431725U (en) | 2011-12-13 | 2011-12-13 | Bolt connection structure for preventing aluminum alloy galvanic corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431725U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9291179B2 (en) | 2013-05-22 | 2016-03-22 | Ford Global Technologies, Llc | Fastener system with dissimilar metals |
| CN105757078A (en) * | 2016-05-04 | 2016-07-13 | 北京新能源汽车股份有限公司 | Metal assembly and vehicle applying same |
| US9840289B2 (en) | 2016-02-16 | 2017-12-12 | Ford Global Technologies, Llc | Truck bed spacer |
| CN111043142A (en) * | 2018-10-11 | 2020-04-21 | 通用汽车环球科技运作有限责任公司 | Fastening assembly |
-
2011
- 2011-12-13 CN CN2011205190254U patent/CN202431725U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9291179B2 (en) | 2013-05-22 | 2016-03-22 | Ford Global Technologies, Llc | Fastener system with dissimilar metals |
| US9840289B2 (en) | 2016-02-16 | 2017-12-12 | Ford Global Technologies, Llc | Truck bed spacer |
| CN105757078A (en) * | 2016-05-04 | 2016-07-13 | 北京新能源汽车股份有限公司 | Metal assembly and vehicle applying same |
| CN111043142A (en) * | 2018-10-11 | 2020-04-21 | 通用汽车环球科技运作有限责任公司 | Fastening assembly |
| US11047417B2 (en) | 2018-10-11 | 2021-06-29 | GM Global Technology Operations LLC | Fastening assembly |
| US11828317B2 (en) | 2018-10-11 | 2023-11-28 | GM Global Technology Operations LLC | Fastening assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGFENG COMMERCIAL VEHICLE CO., LTD. Free format text: FORMER OWNER: DONGFENG AUTOMOBILE CO., LTD. Effective date: 20130903 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430056 WUHAN, HUBEI PROVINCE TO: 442001 SHIYAN, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130903 Address after: 442001 Shiyan City, Hubei province city Zhangwan District Road No. 2 Patentee after: Dongfeng Commercial Vehicle Co.,Ltd. Address before: 430056 Dongfeng Road, Wuhan Economic Development Zone, Hanyang District, Hubei, China, No. 10, No. Patentee before: DONGFENG MOTER Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |