CN211867545U - Positioning pin - Google Patents
Positioning pin Download PDFInfo
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- CN211867545U CN211867545U CN201922372301.8U CN201922372301U CN211867545U CN 211867545 U CN211867545 U CN 211867545U CN 201922372301 U CN201922372301 U CN 201922372301U CN 211867545 U CN211867545 U CN 211867545U
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- arc section
- pin
- positioning
- elastic steel
- elastic
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Abstract
A locating pin comprises a pin body, wherein the pin body comprises a cylindrical rod and an elastic locating part, and the elastic locating part comprises a disc and a plurality of elastic steel sheets annularly distributed on a connecting line of the disc and the circle center of the upper end surface of the cylindrical rod; the elastic steel sheets consist of an upper arc section and a lower arc section connected to the lower part of the upper arc section, a groove is formed between every two adjacent elastic steel sheets, the end part of the upper arc section of each elastic steel sheet is connected with the periphery of the disc to form a spherical shell, the end part of the lower arc section of each elastic steel sheet is connected with the periphery of the upper end face of the cylindrical rod to form a cylinder, and the lower end of the spherical shell is communicated with the upper end of the cylinder. The utility model has no clearance between the positioning pin and the aperture of the matched part, and two elastic positioning pins are used to solve the problem of over-positioning; the requirement for the position size between the two positioning pins is reduced to a certain extent.
Description
Technical Field
The utility model relates to a locating pin.
Background
The locating pin is used for processing or checking fixture location. One side of one pin is limited by 5 degrees of freedom, only one degree of freedom rotating around the pin is not limited, and if the second pin is still a round pin, the distance between the two pins is fixed, the degree of freedom in the connecting line direction of the two pins is limited more at one time, and over-positioning is formed. After the second pin is changed into the diamond pin, the degree of freedom of angular rotation is limited, and the 6-point positioning principle is met. The diameter of the positioning pin is smaller than the diameter of the hole of the part matched with the positioning pin; especially when two positioning pins exist, one positioning pin must be designed into a diamond shape, and the positioning pin and a part inevitably have a gap. Because there is the clearance between locating pin and the part, make the part after the assembly, the part can move around the locating pin to cause the reduction of processing product precision or examine the utensil and cause the erroneous judgement for the product. When two locating pins exist, the position size requirements of the two locating pins are very high, otherwise, parts cannot be mounted on the tool or the checking fixture.
Disclosure of Invention
The purpose of the utility model is to overcome the above disadvantages of the prior art, and to provide a positioning pin, no clearance exists between the positioning pin and the hole diameter of the part matched with the positioning pin, and the over-positioning problem is solved by two elastic positioning pins; the requirement for the position size between the two positioning pins is reduced to a certain extent.
The technical scheme of the utility model is that: the pin comprises a pin body, wherein the pin body comprises a cylindrical rod and an elastic positioning part, and the elastic positioning part comprises a disc and a plurality of elastic steel sheets annularly distributed on a circle center connecting line of the disc and the upper end surface of the cylindrical rod; the elastic steel sheets consist of an upper arc section and a lower arc section connected to the lower part of the upper arc section, a groove is formed between every two adjacent elastic steel sheets, the end part of the upper arc section of each elastic steel sheet is connected with the periphery of the disc to form a spherical shell, the end part of the lower arc section of each elastic steel sheet is connected with the periphery of the upper end face of the cylindrical rod to form a cylinder, and the lower end of the spherical shell is communicated with the upper end of the cylinder.
The spherical shell is an ellipsoid shell.
The upper arc section and the lower arc section of the elastic steel sheet are integrally formed.
The elastic steel sheet is made of spring steel.
The diameter phi D of the disc is smaller than the positioning hole phi D1 of the part, and the maximum diameter phi D of the spherical shell is larger than the positioning hole phi D1 of the part.
The length of the cylindrical rod is greater than that of the cylinder.
When an existing part is designed, due to the fact that the position requirement is higher and higher, when the part is machined and detected by a detection tool, the position of a positioning pin and the gap between the positioning pin and a positioning hole of the part are higher and higher, and even the gap is not allowed. Therefore, the requirements on the design and manufacture of the tool and the check tool are higher and higher, and the cost is higher and higher. And the utility model discloses a locating pin location portion takes thin shell and fluting, can make the compression and the answer that locating pin location portion can relax, so this kind of locating pin has just solved and has had the clearance with the locating hole of part, has also solved the higher problem of position requirement between two locating pins. When the part is installed, the part compresses the positioning pin, and the positioning pin is inwards compressed due to the fact that the positioning pin is provided with the plurality of grooves. When the part is taken out, the positioning pin automatically expands, the elasticity of the spring steel is large, and the service life is long. The locating pin solves the problem of over-locating because the cylindrical pin has deviation towards the inner diameter direction in all directions, and prevents the problem that the over-locating can not lead the parts to be assembled.
Drawings
FIG. 1 is a schematic structural view of a positioning pin of the present invention in use;
FIG. 2 is a front view of the locating pin;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
in the figure, 1 is a bottom plate, 2 is a positioning pin, 3 is a part, phiD is the maximum diameter of the positioning part of the positioning pin 2, phid is the diameter of the top end of the positioning part of the positioning pin 2 and is the diameter of the positioning hole of the part 3, L is the matching length of the positioning pin 2 and the bottom plate 1, and L is the length of a hollow shell formed in the matching of the positioning pin 2 and the fixed plate 1.
Detailed Description
In fig. 1, the elastic positioning portion of the positioning pin 2 is formed in a thin shell shape, the positioning pin 2 is attached to the base plate 1, and the component 3 is attached to the positioning pin 2.
In fig. 2, the upper part of the elastic positioning part of the positioning pin 2 is a spherical shell with a large middle and small two ends, so that the positioning pin can be easily compressed and restored. The diameter phid of the top end disc of the elastic positioning part of the positioning pin 2 is smaller than the diameter phiD 1 of the positioning hole of the part 3, so that the positioning pin 2 can be conveniently arranged in the positioning hole of the part 3. The maximum diameter phid of the positioning portion of the positioning pin 2 is larger than the positioning hole diameter phid 1 of the part 3 and can be easily compressed inward to be smaller than the positioning hole diameter phid 1 of the part 3, so that the positioning portion of the positioning pin 2 and the positioning hole of the part 3 are fitted without a gap. The material of the elastic positioning portion of the positioning pin 2 is spring steel, and heat treatment is performed after the positioning pin 2 is manufactured, so that the maximum diameter phid of the positioning portion of the positioning pin 2 can be compressed and restored, so that the positioning pin 2 can be fitted with the positioning hole of the part 3 without a clearance. The positioning pin 2 is arranged in the length L of the bottom plate 1, a part of the L is also in a thin shell shape, the length of the L is about 1/3 of the L under the condition of ensuring the strength, and the thickness of the thin shell is as thin as possible so as to be easy to compress.
In fig. 3 and 4, under the condition of ensuring the strength of the positioning pin 2, the positions of the thin shells in the positioning pin 2 are uniformly distributed with grooves, the number of the grooves is as large as possible, and the groove width a is determined according to actual conditions so as to be easily compressed or restored.
Claims (6)
1. A locating pin, its characterized in that: the pin comprises a pin body, wherein the pin body comprises a cylindrical rod and an elastic positioning part, and the elastic positioning part comprises a disc and a plurality of elastic steel sheets annularly distributed on a circle center connecting line of the disc and the upper end surface of the cylindrical rod; the elastic steel sheets consist of an upper arc section and a lower arc section connected to the lower part of the upper arc section, a groove is formed between every two adjacent elastic steel sheets, the end part of the upper arc section of each elastic steel sheet is connected with the periphery of the disc to form a spherical shell, the end part of the lower arc section of each elastic steel sheet is connected with the periphery of the upper end face of the cylindrical rod to form a cylinder, and the lower end of the spherical shell is communicated with the upper end of the cylinder.
2. The locating pin of claim 1, wherein: the spherical shell is an ellipsoid shell.
3. The locating pin of claim 1, wherein: the upper arc section and the lower arc section of the elastic steel sheet are integrally formed.
4. The locating pin of claim 1, wherein: the elastic steel sheet is made of spring steel.
5. The locating pin of claim 1, wherein: the diameter phid of the disc is smaller than a positioning hole phiD 1 of the part (3), and the maximum diameter phiD of the spherical shell is larger than the positioning hole phiD 1 of the part.
6. The locating pin of claim 1, wherein: the length of the cylindrical rod is greater than that of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922372301.8U CN211867545U (en) | 2019-12-26 | 2019-12-26 | Positioning pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922372301.8U CN211867545U (en) | 2019-12-26 | 2019-12-26 | Positioning pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211867545U true CN211867545U (en) | 2020-11-06 |
Family
ID=73263004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922372301.8U Active CN211867545U (en) | 2019-12-26 | 2019-12-26 | Positioning pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211867545U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278655A (en) * | 2021-12-30 | 2022-04-05 | 内蒙古北方重工业集团有限公司 | Over-positioning automatic compensation positioning pin |
-
2019
- 2019-12-26 CN CN201922372301.8U patent/CN211867545U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278655A (en) * | 2021-12-30 | 2022-04-05 | 内蒙古北方重工业集团有限公司 | Over-positioning automatic compensation positioning pin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A locating pin Effective date of registration: 20220623 Granted publication date: 20201106 Pledgee: Bank of China Limited Xiangyang Branch Pledgor: XINXING HEAVY INDUSTRY HUBEI 3611 MECHANICAL Co.,Ltd. Registration number: Y2022980008672 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230926 Granted publication date: 20201106 Pledgee: Bank of China Limited Xiangyang Branch Pledgor: XINXING HEAVY INDUSTRY HUBEI 3611 MECHANICAL Co.,Ltd. Registration number: Y2022980008672 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |