Positioning pin as well as use method and application thereof

Abstract

The invention discloses a positioning pin and a using method and application thereof. An annular groove is formed in the press-fit section of the positioning pin, after press-fit, a certain gap is formed in an opening of a pin hole due to the fact that the opening of the pin hole corresponds to the annular groove, the opening of the pin hole is not stressed, certain stress release can be formed in the opening due to the fact that certain stress exists in the press-fit section, and a structure similar to riveting is formed. The condition that a pin hole is always in a similar opening expansion state due to the fact that no place is released for press-fit stress in a traditional positioning pin can be improved; meanwhile, the annular groove and the guide section are spaced, so that barb press fit is formed at the annular groove, a certain hindering effect on reverse pull-out is achieved, the pull-out force of the pin is improved, and the requirement for repeated disassembly, assembly and use of a product can be met. According to the use method of the positioning pin, the epoxy resin is firstly coated in the annular groove, then the guide section and the press-fit section are completely inserted into the pin hole, and the pull-out force of the pin after press-fit can be further enhanced after the epoxy resin is cured after press-fit. The positioning pin can be applied to radio frequency products.

Description

Technical Field

[0001] The invention belongs to the field of mechanical engineering and relates to a component positioning and installation technology, in particular to a novel positioning pin and a use method and application thereof. Background Art

[0002] With the rapid development of aviation and aerospace engineering, products are becoming more and more miniaturized and integrated. In order to ensure the stable transmission of radio frequency signals, each subsystem needs to be positioned during installation. The pin-pin-hole positioning solution is the most widely used.

[0003] RF products need to be debugged and installed many times. During the product disassembly and assembly process, the positioning pins will be subjected to multiple forces. Due to cost factors, the method of processing the pins and the shell as one piece is not commonly used in actual production. During the application process, the pins of the traditional press-fit structure are subject to excessive radial force and the shell falls off after multiple insertions or alignment, which affects product debugging and even product reliability. Summary of the invention

[0004] The purpose of the present invention is to provide a positioning pin with an improved press-fit section, and a method for using and application of the same. The press-fit section can form a certain stress release at the hole mouth by setting an annular groove to correspond to the pin hole mouth, forming a structure similar to a riveted structure, which can improve the situation in the traditional pin structure where the pin hole is always in a similar expansion state due to the stress of the press-fit having nowhere to be released, and at the same time improve the pull-out force of the pin, so as to solve the problem that the above-mentioned existing pins are subjected to excessive radial force and the shell falls off after multiple insertions or alignment during the application process, thereby affecting product debugging and even affecting product reliability.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a positioning pin, comprising a guiding section, a press-fit section and a positioning section which are arranged in sequence along the axial direction, the diameters of the guiding section, the press-fit section and the positioning section are increased in sequence, the press-fit section is used to be fully inserted into an adapted pin hole, and the press-fit section is provided with an annular groove which can correspond to the orifice of the pin hole.

[0007] In some embodiments, the press-fit section is provided with a plurality of annular grooves spaced apart along its axial direction, and the annular groove close to the positioning section is arranged closely to the positioning section, and the annular groove close to the guiding section is spaced apart from the guiding section.

[0008] In some implementations, the groove width and groove depth of all the annular grooves are the same.

[0009] In some embodiments, the annular grooves are arranged at equal intervals on the press-fit section.

[0010] In some embodiments, two annular grooves are provided on the press-fit section at intervals along its axial direction.

[0011] In some embodiments, the inner diameter of the annular groove is not less than the outer diameter of the guide section.

[0012] In some embodiments, a chamfer is provided between the guiding section and the press-fit section.

[0013] In some implementations, except for the annular groove close to the positioning section, the ends of the remaining annular grooves close to the positioning section are all provided with chamfers.

[0014] The present invention provides a method for using any of the positioning pins described above, comprising: coating epoxy resin in the annular groove; inserting the guiding section and the press-fit section into the pin hole, and waiting for the epoxy resin to cure after press-fitting.

[0015] The present invention proposes an application of any one of the above-mentioned positioning pins in a radio frequency product.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The positioning pin proposed in the present invention can achieve a new press-fitting method by arranging an annular groove in the press-fitting section. After press-fitting, the pin hole opening corresponds to the annular groove, so that there is a certain gap at the pin hole opening, and no force is applied here. Moreover, since there is a certain stress in the press-fitting section, a certain stress release will be formed at the opening, forming a structure similar to riveting, which can improve the situation in which the pin hole is always in a similar expansion state due to the stress of press-fitting having nowhere to be released in the traditional positioning pin. At the same time, the annular groove is spaced from the guide section, so that a barbed press-fit is formed at the annular groove, which has a certain hindering effect on reverse pull-off. Compared with the traditional structure, the pull-off force of the pin is improved, and the product can be disassembled and used for multiple times, thereby solving the problem that the existing pins are subjected to excessive radial force and the shell falls off after multiple insertions or alignment during the application process, thereby affecting product debugging and even affecting product reliability.

[0018] The method for using the positioning pin proposed by the present invention is to first apply epoxy resin in the annular groove, then insert the guiding section and the press-fit section into the pin hole, and wait for the epoxy resin to solidify after press-fitting, so as to further enhance the pull-out force of the pin after press-fitting.

[0019] The positioning pin proposed in the present invention can be used in radio frequency products, etc. After being pressed, the pull-out force of the pin can be increased, thereby effectively improving the phenomenon of the pin falling off with the plug-in during the disassembly and assembly process, and can meet the needs of multiple disassembly and assembly of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of a traditional positioning pin;

[0022] Figure 2 It is a schematic diagram of the structure of the positioning pin disclosed in the embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a positioning pin in a press-fit state disclosed in an embodiment of the present invention.

[0024] In the figure, the reference numerals are: 1-positioning pin; 2-guiding section; 3-press-fit section; 4-positioning section; 5-annular groove; 6-chamfer; 7-housing; 8-pin hole; 9-epoxy resin. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] One of the purposes of the present invention is to provide a positioning pin with an improved press-fit section. The press-fit section corresponds to the pin hole orifice by setting an annular groove, so that the press-fit section can form a certain stress release at the orifice, forming a structure similar to a riveted structure. This can improve the situation in the traditional pin structure where the pin hole is always in a similar expansion state due to the stress of the press-fit having nowhere to be released. At the same time, the pull-out force of the pin is improved to solve the problem that the existing pins are subjected to excessive radial force and the shell falls off after multiple insertions or alignment during the application process, thereby affecting product debugging and even affecting product reliability.

[0027] Another object of the present invention is to provide a method for using the positioning pin.

[0028] Another object of the present invention is to provide an application of the above-mentioned positioning pin in a radio frequency product.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1 As shown in FIG. 1 , the structure of a conventional positioning pin includes a guide section 2, a press-fit section 3 and a positioning section 4 arranged in sequence along the axial direction. The left end of the structure is the guide section 2, which plays a guiding role during press-fitting. The press-fit section 3 is the interference fit with the pin hole, and the positioning section 4 is the user's use section. The positioning pin 1 proposed in this embodiment is as follows: Figure 2 As shown, the diameters of the guide section 2, the press-fit section 3 and the positioning section 4 increase in sequence, and a shoulder is formed between two adjacent sections; at least one annular groove 5 is added to the press-fit section 3. After being press-fitted into place, the press-fit section 3 completely enters the pin hole 8, and the orifice of the pin hole 8 (i.e., the end of the pin hole close to the positioning section 4) corresponds to an annular groove 5 portion of the pin, which makes a certain gap exist at the orifice of the pin hole 8 (i.e., the end of the pin hole close to the positioning section 4), where no force is applied, and because there will be a certain stress in the press-fit section 3, a certain stress release will be formed at the orifice (i.e., the end of the pin hole close to the positioning section 4), forming a structure similar to riveting, which can effectively improve the situation in which the pin hole 8 is always in a similar expansion state due to the stress of the press-fit having nowhere to be released in the traditional positioning pin. At the same time, the left end of the annular groove 5 is spaced from the guide section 2, so that the left end of the annular groove 5 (i.e., the end close to the guide section 2) is equivalent to forming a barbed press fit (i.e., the left end is thick and the right end is thin), which has a certain hindering effect on the reverse pull-off. Compared with the traditional structure, the pull-off force of the pin press fit structure is enhanced, and the problem of excessive radial force and shell falling off of the existing pins after multiple insertions or alignment during the application process can be solved, thereby affecting product debugging and even affecting product reliability. This solution can improve the reliability of the pin.

[0032] In some embodiments, a plurality of annular grooves 5 are arranged at intervals along the axial direction of the press-fit section 3, and the annular groove 5 near the positioning section 4 is arranged close to the positioning section 4. The annular groove 5 is used to correspond to the orifice of the pin hole 8 after the press-fit section 3 is fully inserted into the pin hole 8; the annular groove 5 near the guide section 2 is arranged at intervals from the guide section 2 to ensure that a barb press-fit is formed at each annular groove 5 (i.e., thick at the left end and thin at the right end). The multi-stage barb press-fit can effectively enhance the pull-out force of the pin press-fit structure.

[0033] In some embodiments, Figure 2 and Figure 3 As shown, preferably, two annular grooves 5 are arranged at intervals along the axial direction of the press-fit section 3. The left ends of the two annular grooves 5 are equivalent to two barbs for press-fitting, which have a certain hindering effect on reverse pull-off.

[0034] In some embodiments, the groove width and groove depth of all the annular grooves 5 are the same. In practical applications, the number, size, and arrangement interval of the annular grooves 5 can be flexibly adjusted and are not limited to one form, that is, the groove width and groove depth of all the annular grooves 5 can also be different.

[0035] In some implementations, the two or more annular grooves 5 on the press-fit section 3 may be arranged at equal intervals or at unequal intervals, which may be flexibly adjusted according to application scenarios and corresponding requirements.

[0036] In some embodiments, it is preferred that the inner diameter of each annular groove 5 is not less than the outer diameter of the guiding section 2 .

[0037] In some embodiments, in order to improve the overall structural strength of the pin, a chamfer 6 is preferably provided between the guide section 2 and the press-fit section 3. At the same time, except for the annular groove 5 close to the positioning section 4, the ends of the remaining annular grooves 5 close to the positioning section 4 are all provided with a chamfer 6.

[0038] It can be seen that this solution proposes a new positioning pin, which can achieve the following by providing an annular groove 5 in the press-fit section 3: Figure 3 The new press-fit method shown in the figure can greatly increase the pull-out force of the pin after press-fitting. Through comparative tests: Figure 2 Compared with the changed positioning pin 1 Figure 1 The pull-off force of the positioning pin before the change can be increased by about 4 times, which effectively improves the phenomenon of the pin falling off with the plug-in during the disassembly and assembly process, can meet the needs of multiple disassembly and assembly of the product, and can be used in some radio frequency products. In actual applications, multiple annular grooves can be used step by step to enhance the pull-off force of the pin according to different application environments to meet different usage requirements.

[0039] Example 2

[0040] This embodiment provides a method for using the positioning pin 1 in embodiment 1, including: applying epoxy resin 9 in the annular groove 5; inserting the guiding section 2 and the press-fit section 3 into the pin hole 8, and waiting for the epoxy resin 9 to solidify after press-fitting, so as to further enhance the pull-out force of the pin after press-fitting. In practical applications, multiple annular grooves can be used step by step to enhance the pull-out force of the pin according to different application environments to meet different use requirements.

[0041] Example 3

[0042] This embodiment proposes an application of the positioning pin 1 in embodiment 2 in a radio frequency product, the radio frequency product includes a housing 7, a pin hole 8 is provided on the housing 7, a positioning pin 1 with a specification matching the pin hole 8 is used, the guiding section 2 and the press-fit section 3 are all inserted into the pin hole 8, and the press-fit section 3 is used to make an interference fit with the pin hole 8. Among them, by providing an annular groove 5 in the press-fit section 3, the pull-out force of the pin can be increased after press-fitting, thereby effectively improving the phenomenon that the pin falls off with the plug-in during the disassembly and assembly process, and can meet the needs of multiple disassembly and assembly of the product.

[0043] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0044] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A positioning pin, comprising a guide section (2), a press-fit section (3) and a positioning section (4) arranged in sequence along the axial direction, wherein the diameters of the guide section (2), the press-fit section (3) and the positioning section (4) increase in sequence, and characterized in that: The press-fit section (3) is used to be fully inserted into the matching pin hole, and the press-fit section (3) is provided with an annular groove (5) that can correspond to the orifice of the pin hole.

2. The positioning pin according to claim 1, characterized in that: The press-fit section (3) is provided with a plurality of annular grooves (5) at intervals along its axial direction, and the annular groove (5) close to the positioning section (4) is arranged in close proximity to the positioning section (4), and the annular groove (5) close to the guiding section (2) is arranged at intervals from the guiding section (2).

3. The positioning pin according to claim 2, characterized in that: The groove width and groove depth of all the annular grooves (5) are the same.

4. The positioning pin according to claim 2, characterized in that: The annular grooves (5) are arranged at equal intervals on the press-fit section (3).

5. The positioning pin according to claim 2, characterized in that: The press-fit section (3) is provided with two annular grooves (5) spaced apart along its axial direction.

6. The positioning pin according to any one of claims 1 to 5, characterized in that: The inner diameter of the annular groove (5) is not less than the outer diameter of the guiding section (2).

7. The positioning pin according to any one of claims 1 to 5, characterized in that: A chamfer (6) is provided between the guiding section (2) and the press-fit section (3).

8. The positioning pin according to any one of claims 2 to 5, characterized in that: Except for the annular groove (5) close to the positioning section (4), the ends of the remaining annular grooves (5) close to the positioning section (4) are all provided with chamfers (6).

9. A method for using the positioning pin according to any one of claims 1 to 8, characterized in that: include: Applying epoxy resin (9) in the annular groove (5); The guiding section (2) and the press-fit section (3) are completely inserted into the pin hole, and after press-fitting, the epoxy resin (9) is cured.

10. Use of the positioning pin according to any one of claims 1 to 8 in a radio frequency product.

Images