CN210452486U - Positioning tool for needle valve matching part positioning pin - Google Patents
Positioning tool for needle valve matching part positioning pin Download PDFInfo
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- CN210452486U CN210452486U CN201921499905.2U CN201921499905U CN210452486U CN 210452486 U CN210452486 U CN 210452486U CN 201921499905 U CN201921499905 U CN 201921499905U CN 210452486 U CN210452486 U CN 210452486U
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- positioning
- needle valve
- locating pin
- hole
- injector body
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Abstract
The utility model discloses a positioning tool for needle valve idol locating pin, needle valve idol locating pin pass the locating pin hole of injector nozzle side to set up in the injector internally, this positioning tool is including wearing to establish the inside location mandrel of the cavity of injector, and location mandrel one side is provided with the first end with the inlet hole laminating of injector, and the opposite side is provided with the second tip with the nozzle excircle location hole laminating of injector, still is provided with one and is located the cylinder portion of locating pin hole top, the degree of depth that injector inner wall was worn out to needle valve idol locating pin are C, and cylinder portion diameter is D, and injector inner hole diameter that locating pin hole position corresponds is B, and D ═ B-2C. The utility model provides a positioning problem of critical dimension and degree of depth among the actual assembling process of spare part. By adopting the positioning tool, the positioning precision is higher, the assembly and disassembly are simple and quick, the problem of large common positioning error is solved, and the production efficiency is greatly improved.
Description
Technical Field
The utility model relates to an installation location of diesel engine key part injector body, concretely relates to positioning tool for needle valve idol locating pin.
Background
The oil injector body is an important part in a fuel system of a marine diesel engine, a needle valve coupling part, a nozzle and the like are arranged on the oil injector body, and the needle valve coupling part and the nozzle directly determine the atomization quality, ensure the combustion perfection, ensure the thermal efficiency of a diesel engine and the like. The method is a key factor influencing the operation condition of the main engine and is important for normal and safe navigation of the ship.
The injector body is the main part of the injector, and if the relative positions of the needle valve matching part and the nozzle which are arranged in the injector body deviate, the overall performance of a diesel engine fuel system is greatly influenced, if the positioning is not accurate, the injection angle of the nozzle is incorrect, and the diesel engine cannot be ignited and operated. As the main part of fuel injection, the positioning of the fuel injection nozzle, the needle valve matching part and the nozzle directly determine the running condition of the diesel engine.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a positioning tool for needle valve idol spare locating pin. The needle valve matching part positioning pin simply, accurately and quickly penetrates through the oil injector body, and the problems of positioning depth and positioning error when the needle valve matching part positioning pin is assembled with a nozzle are solved.
In order to achieve the above object, the utility model provides a positioning tool for needle valve idol locating pin, needle valve idol locating pin pass the locating pin hole of injector nozzle side to set up in the injector internally, this positioning tool is including wearing to establish the inside location mandrel of the cavity of injector, and location mandrel one side is provided with the first end with the inlet hole laminating of injector, and the opposite side is provided with the second end with the nozzle excircle location hole laminating of injector, still is provided with one and is located the cylinder portion of locating pin hole top, the degree of depth that injector inner wall was worn out to needle valve idol locating pin are C, and cylinder portion diameter is D, and the injector inner hole diameter that locating pin hole position corresponds is B, and D equals B-2C.
The concentricity of the first end part, the second end part and the cylindrical part is less than or equal to 0.002mm, the handle is installed at the first end part of the positioning mandrel and is provided with external threads matched with the internal threads of the first end part, the handle of the handle is arranged in a circular arc transition shape so as to be convenient to hold, the handle is a bakelite handle, and the interference between the needle valve matching part positioning pin and the positioning pin hole is more than 0.1mm so as to ensure that the needle valve matching part positioning pin cannot be detached after penetrating through the positioning pin hole of the oil injector body.
The utility model discloses, can solve the positioning problem of critical dimension and the degree of depth among the actual assembling process of spare part.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model provides a positioning problem of critical dimension and degree of depth among the actual assembling process of spare part.
2. The utility model discloses positioning accuracy is higher and loading and unloading are simple swift, have overcome the big problem of ordinary positioning error, and have increased substantially production efficiency.
3. The utility model discloses guaranteed that the important spare part location of diesel engine satisfies the designing requirement, ensured the normal operating of diesel engine and the safe normal operating of boats and ships.
4. The utility model discloses what mainly take is that the hole has great spreading value and general meaning in the aspect of the part locating pin location as the benchmark with the hole as the benchmark for the positioning method of benchmark.
Drawings
FIG. 1 is a schematic structural view of a pin for a needle valve coupling part according to the present invention;
FIG. 2 is a schematic structural diagram of an injector body according to the present invention;
FIG. 3 is a schematic structural view of the injector body, the needle valve coupling positioning pin and the positioning tool provided by the present invention;
fig. 4 is a schematic structural view of a positioning mandrel provided by the present invention;
fig. 5 is a schematic view of the handle structure provided by the present invention.
Detailed Description
The present invention will be further described with reference to the following embodiments, which are only used for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, the utility model relates to a positioning tool for a needle valve coupling positioning pin 1. In fig. 2, a needle valve matching part positioning pin 1 passes through a positioning pin hole 3 on the side of a nozzle 2 of an injector body 4 and is arranged in the injector body 4. As shown in fig. 3 and 4, the positioning tool comprises a positioning mandrel 11 penetrating through the cavity of the injector body 4, a first end portion 7 attached to an inlet hole 6 of the injector body 4 is arranged on one side of the positioning mandrel 11, a second end portion 8 attached to a nozzle outer circle positioning inner hole 2 of the injector body 4 is arranged on the other side of the positioning mandrel 11, a cylindrical portion 9 located above the positioning pin hole 3 is further arranged, the depth of the needle valve matching part positioning pin 1 penetrating through the inner wall of the injector body 4 is C, the diameter of the cylindrical portion 9 is D, the diameter of the injector inner hole 5 corresponding to the position of the positioning pin hole 3 is B, and D is B-2C.
The outer circle of the positioning mandrel 11 is ground by a tool, the concentricity of the first end part 7, the second end part 8 and the cylindrical part 9 is less than or equal to 0.002mm, and the positioning precision of the related inner hole can be ensured; as shown in fig. 5, the first end 7 of the positioning spindle 11 is fitted with a handle 12, and the handle 12 is provided with an external thread 14 matching the internal thread 10 of the first end 7, acting to reduce the component and fitting into the handle 12; the handle 13 of the handle 12 is provided with a circular arc transition shape for convenient holding, the external thread 14 of the handle 12 can be screwed in by hand until the plane is flat when the handle is connected with the positioning mandrel 11, and the handle 13 is held to pull out the positioning mandrel 11 when the handle is pulled out; the handle 12 is a bakelite handle; the interference between the needle valve matching part positioning pin 1 and the positioning pin hole 3 is more than 0.1mm, so that the needle valve matching part positioning pin cannot be detached after penetrating through the positioning pin hole 3 of the oil injector body 4, and the size C must be ensured to control the relative position of the nozzle 2 and the needle valve matching part.
As shown in fig. 2, the tolerance of the inlet hole 6 of the injector body 4 is +0.025mm, and the tolerance of the inner hole 5 of the injector body corresponding to the position of the positioning pin hole 3 is +0.05/+0.1 mm; the tolerance of the depth C of the needle valve matching part positioning pin 1 penetrating out of the inner wall of the oil injector body 4 is +0.1 mm; the positioning length of the positioning pin hole 3 from the nozzle 2 is K, and the tolerance is +/-0.2 mm; the tolerance requirement of the nozzle excircle positioning inner hole 2 is +0.05 mm. The first end part 7, the second end part 8 and the cylindrical part 9 of the positioning mandrel 11 are respectively contacted with the inlet hole 6 of the injector body 4, the nozzle excircle positioning inner hole 2 and the injector body inner hole 5 corresponding to the positioning pin hole 3; the diameter of the first end part 7 of the positioning mandrel 11 is F, the diameter of the second end part 8 is G, the diameter of the inlet hole 6 of the oil injector body 4 is A, the diameter of the nozzle excircle positioning inner hole 2 of the oil injector body 4 is E, and the sizes F and G are 0.01-0.02mm smaller than A and E; the inner hole 5 of the injector body corresponding to the positions of the inlet hole 6 of the injector body 4, the nozzle opening 2 and the positioning pin hole 3 is bored out by a cutter head, and the jumping amount is less than or equal to 0.03 mm.
As shown in figure 3, in the positioning process, a positioning mandrel 11 is firstly plugged into an injector body 4, after the positions of an inlet hole 6 of the injector body 4, a nozzle opening 2 and an injector body inner hole 5 corresponding to the positions of a positioning pin hole 3 are positioned, a needle valve matching part positioning pin 1 is inserted into the positioning pin hole 3 of the injector body 4, when the needle valve matching part positioning pin is assembled to touch a cylindrical part 9 of the positioning mandrel 11 above the positioning pin hole 3, the needle valve matching part positioning pin cannot be assembled continuously under stress, and the relative position of the dimension C can be determined to be in place. The relative positions of the needle valve matching part and the nozzle 2 installed in the oil injector body 4 are ensured to be free from deviation, and the diesel engine can be normally ignited and operated.
The utility model discloses a theory of operation:
the positioning mandrel 11 is plugged into the injector body 4, the first end part 7 of the positioning mandrel 11 is attached to the inlet hole 6 of the injector body 4, the second end part 8 is attached to the nozzle excircle positioning inner hole 2 of the injector body 4, the cylindrical part 9 of the positioning mandrel 11 is just positioned at the injector body inner hole 5 corresponding to the positioning pin hole 3, the needle valve matching part positioning pin 1 penetrates into the positioning pin hole 3 of the injector body 4, the cylindrical part 9 meeting the positioning mandrel 11 cannot be continuously installed under stress, and therefore the relative position of the needle valve matching part positioning pin 1 can be determined.
To sum up, the utility model relates to a positioning tool for needle valve idol locating pin has solved the positioning problem of key dimension and the degree of depth in the actual assembling process of spare part, and not only positioning accuracy is higher and loading and unloading are simple swift, have overcome the big problem of ordinary positioning error, have increased substantially production efficiency moreover.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (7)
1. The utility model provides a positioning tool for needle valve idol locating pin, this needle valve idol locating pin passes the locating pin hole of injector body nozzle side to set up in the injector body, its characterized in that, this positioning tool includes:
the positioning mandrel penetrates through the cavity of the oil sprayer body;
one side of the positioning mandrel is provided with a first end part which is attached to an inlet hole of the oil injector body;
the other side of the positioning mandrel is provided with a second end part which is attached to a positioning inner hole of the nozzle excircle of the oil sprayer body;
the positioning mandrel is also provided with a cylindrical part which is positioned above the positioning pin hole;
the needle valve matching part positioning pin penetrates out of the inner wall of the oil injector body, the depth of the inner wall of the oil injector body is C, the diameter of the cylindrical part is D, the diameter of an inner hole of the oil injector body corresponding to the position of the positioning pin hole is B, and D is B-2C.
2. The locating tool for a needle valve couple locating pin of claim 1, wherein the concentricity of said first end portion, said second end portion and said cylindrical portion is less than or equal to 0.002 mm.
3. The positioning tool for a needle valve couple positioning pin of claim 1 wherein said first end of said positioning spindle is fitted with a handle.
4. The locating tool for a needle valve couple locating pin of claim 3 wherein said handle is provided with external threads to mate with internal threads of said first end portion.
5. The alignment tool for a needle valve couple alignment pin of claim 4 wherein said handle grip is configured with a rounded transition shape to facilitate gripping.
6. The locating tool for a needle valve couple locating pin of claim 5 wherein said handle is a bakelite handle.
7. The locating tool for a needle valve couple locating pin according to claim 1, wherein the needle valve couple locating pin has an interference of 0.1mm or more with the locating pin hole, so that the needle valve couple locating pin cannot be detached after passing through the locating pin hole of the injector body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921499905.2U CN210452486U (en) | 2019-09-10 | 2019-09-10 | Positioning tool for needle valve matching part positioning pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921499905.2U CN210452486U (en) | 2019-09-10 | 2019-09-10 | Positioning tool for needle valve matching part positioning pin |
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| Publication Number | Publication Date |
|---|---|
| CN210452486U true CN210452486U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921499905.2U Active CN210452486U (en) | 2019-09-10 | 2019-09-10 | Positioning tool for needle valve matching part positioning pin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509208A (en) * | 2019-09-10 | 2019-11-29 | 上海沪东造船油嘴油泵有限公司 | A kind of positioning tool for pintle nozzle match-ing parts positioning pin |
-
2019
- 2019-09-10 CN CN201921499905.2U patent/CN210452486U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509208A (en) * | 2019-09-10 | 2019-11-29 | 上海沪东造船油嘴油泵有限公司 | A kind of positioning tool for pintle nozzle match-ing parts positioning pin |
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