CN205876577U - Diesel engine injection pump of plunger rod has been improved - Google Patents
Diesel engine injection pump of plunger rod has been improved Download PDFInfo
- Publication number
- CN205876577U CN205876577U CN201620756454.6U CN201620756454U CN205876577U CN 205876577 U CN205876577 U CN 205876577U CN 201620756454 U CN201620756454 U CN 201620756454U CN 205876577 U CN205876577 U CN 205876577U
- Authority
- CN
- China
- Prior art keywords
- plunger
- plunger rod
- injection pump
- oil
- bushing
- 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 - Fee Related
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses a diesel engine injection pump of plunger rod has been improved, including the pump body, plunger matching parts and delivery valve matching parts. The pump body has the plunger chamber, plunger matching parts includes plunger bushing and plunger rod, the plunger bushing is fixed the plunger intracavity, this plunger rod slidable ground sets up in the plunger bushing. Delivery valve matching parts is located the upper end of plunger rod. The plunger bushing includes the oil gallery, the bottom of centre bore is equipped with down the counter bore, the lateral wall of plunger rod still is equipped with the annular, and this annular is connected to through a horizontal hole lower counter bore. When the plunger rod terminal surface coincided with inlet port outer wall generating line, the oil pressure increased, beginning pump oil. The annular coincided with the oil gallery this moment, and the counter bore gets into the oil gallery under the diesel oil warp of fraction, avoids the oil pressure to increase suddenly.
Description
Technical field
This utility model relates to diesel engine fuel injecting device, particularly relates to a kind of diesel injection pump improving plunger rod.
Background technology
Plunger matching parts is the precise part of diesel injection pump, and it directly affects pump oil efficiency.Plunger matching parts includes plunger
Bar and plunger bushing, plunger rod has centre bore and helicla flute, and plunger bushing has fuel feed hole.End face seal fuel feed hole when plunger rod
Time, start oil-feed.When helicla flute connects with fuel feed hole, start draining.When plunger rod end face overlaps with fuel feed hole outer wall bus,
Oil pressure moment sharply increases so that diesel oil sprays from delivery valve matching parts.Moment, oil pressure jumpy was unfavorable for the abundant of diesel oil
Burning, is further improved.
Utility model content
The utility model proposes a kind of diesel injection pump improving plunger rod, during oil-feed, oil pressure is smooth increases
Adding, beneficially diesel oil fully burns.
The technical solution of the utility model is achieved in that
A kind of diesel injection pump improving plunger rod, including the pump housing, plunger matching parts and delivery valve matching parts, described pump
Body has plunger cavity, and described plunger matching parts includes that plunger bushing and plunger rod, described plunger bushing are fixed in described plunger cavity, this post
Stopper rod is slidably disposed in described plunger bushing, and described delivery valve matching parts is positioned at the upper end of described plunger rod, described plunger bushing
Including fuel feed hole, the middle part of described plunger rod is provided with centre bore, and the sidewall of this plunger rod is provided with helicla flute, and this helicla flute connects institute
State fuel feed hole and centre bore, it is characterised in that described plunger bushing also includes that spill port, the bottom of described centre bore are provided with sinking
Hole, the sidewall of described plunger rod is additionally provided with annular groove, and this annular groove is connected to described lower counterbore through a lateral aperture.
In the diesel injection pump improving plunger rod of the present utility model, the diameter of described lower counterbore is less than in described
The diameter of central hole, the diameter of described spill port is less than the diameter of described fuel feed hole.
In the diesel injection pump improving plunger rod of the present utility model, the sidewall of described plunger rod is additionally provided with oil storage
Groove, this oil storage tank is made up of two curved portions and a protuberance, and this protruding parts is between two described curved portions.
In the diesel injection pump improving plunger rod of the present utility model, this diesel injection pump also includes cam
Axle, the described pump housing also has cam chamber, and described camshaft is rotatably arranged in described cam chamber.
In the diesel injection pump improving plunger rod of the present utility model, this diesel injection pump also includes that controlling oil draws
Bar.
Implement this diesel injection pump improving plunger rod of the present utility model, have the advantages that plunger
When rod end surface overlaps with fuel feed hole outer wall bus, oil pressure increases, and starts pump oil.Now annular groove overlaps with spill port, fraction
Diesel oil enters spill port through lower counterbore, it is to avoid oil pressure increases suddenly.When annular groove leaves spill port, oil pressure may proceed to again rise.
During oil-feed, oil pressure is smooth increases, and beneficially diesel oil fully burns.Part fluid can be stored, it is ensured that plunger rod moistens in oil storage tank
Sliding.The arcuate structure of this oil storage tank, can avoid stress to concentrate, and improves part durability.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this diesel injection pump of the present utility model；
Fig. 2 is the schematic diagram of the plunger matching parts of Fig. 1；
Fig. 3 is the schematic diagram of the other direction of Fig. 2；
Fig. 4 is the partial view of Fig. 2；
Fig. 5 is the schematic diagram under another state of Fig. 3；
Fig. 6 is the partial view at the A of Fig. 2；
Fig. 7 is the partial view at the B of Fig. 2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe.
Such as Fig. 1 to the of the present utility model this diesel injection pump shown in 7, including the pump housing 100, camshaft 200, plunger
Couple 300, tourelle 400 and delivery valve matching parts 500.The described pump housing 100 has cam chamber 110 and plunger cavity 120, described
Camshaft 200 is rotatably arranged in described cam chamber 110.Described plunger matching parts 300 includes plunger bushing 310 and plunger rod
320, described plunger bushing 310 is fixed in described plunger cavity 120.This plunger rod 320 is slidably disposed on described plunger bushing 310
In, the bottom of this plunger rod 320 is pressed on described tourelle 400, and this tourelle 400 is positioned on described camshaft 200.
Driving means drives camshaft 200 to rotate, and camshaft 200 drives tourelle 400 and plunger rod about 320 by cam 210
Mobile, plunger rod 320 is pump oil, draining in moving process.Delivery valve matching parts 500 is positioned at above plunger matching parts 300, the bavin pumped out
Oil sprays from delivery valve matching parts 500.In the present embodiment, the bottom of described plunger rod 320 is provided with locating ring 321, described bavin
Oil machine injection pump also includes the spring seat of honour 610, spring lower seat 620 and thrust spring 630.One end of described thrust spring 630
Being connected to the described spring seat of honour 610, the other end is connected to described spring lower seat 620, and the described spring seat of honour 610 is pressed in the described pump housing
100 inwalls, described spring lower seat 620 is pressed on described locating ring 321.Described tourelle 400 includes push rod 410, roller
420, described roller 420 is rotatably arranged in described push rod 410 lower end, and described locating ring 321 is pressed in the upper of described push rod 410
End.This diesel injection pump also includes controlling oil pull bar 640, fuel-displaced tight seat 650 etc., does not repeats at this.
Described plunger bushing 310 includes that fuel feed hole 311, the middle part of described plunger rod 320 are provided with centre bore 322, this plunger rod
The sidewall of 320 is provided with helicla flute 323, and this helicla flute 323 connects described fuel feed hole 311 and centre bore 322.Plunger rod 320 end face
When overlapping with fuel feed hole 311 outer wall bus, oil pressure increases, and starts pump oil.By driving lever 330 Rotational Cylindrical stopper rod 320, adjustable spiral shell
Spin slot 323 and the relative position of fuel feed hole 311, change pump oil stroke.Described plunger bushing 310 also includes spill port 312, described in
The bottom of central hole 322 is provided with lower counterbore 324, and the sidewall of this centre bore 322 is additionally provided with annular groove 325, and this annular groove 325 is through a lateral aperture
326 are connected to described lower counterbore 324.When pump oil starts, annular groove 325 overlaps with spill port 312, and the diesel oil of fraction is through lower counterbore
324 enter spill port 312, it is to avoid oil pressure increases suddenly.When annular groove 325 leaves spill port 312, oil pressure may proceed to again rise.
During oil-feed, oil pressure seriality increases, and beneficially diesel oil fully burns.Lower counterbore 324 connects back to oilhole 312 through annular groove 325,
No matter how plunger rod 320 rotates, and annular groove 325 remains at specific height connection lower counterbore 324 and spill port 312.Institute
Stating the diameter diameter less than described centre bore 322 of lower counterbore 324, the diameter of described spill port 312 is less than described fuel feed hole 311
Diameter.The oil return of small-bore can ensure that the pressure release of the little scope of spill port 312, is not enough to affect pump oil process.
The lower section of described plunger bushing 310 is provided with annular groove 325, is provided with one and scrapes oil jacket 340 in described annular groove 325, and this scrapes oil jacket
340 have multiple prominent ring 341, and this prominent ring 341 is pressed on described plunger rod 320.The prominent ring 341 scraping oil jacket 340 is pressed in
On described plunger rod 320, during plunger rod 320 slides, prominent ring 341 constantly scrapes off the oil of plunger rod 320 outer surface
Liquid, it is ensured that plunger rod 320 smooth outer surface, improves pump oil efficiency.The sidewall of described plunger bushing 310 is provided with positioning through hole 313, institute
The sidewall stating prominent ring 341 is provided with Blind locating holes 342, and a screw 343 is fixed in this positioning through hole 313, the end of this screw 343
Portion stretches into described Blind locating holes 342.Screw can scrape oil jacket 340 and be fixed on the lower section of plunger bushing 310, facilitates again operator simultaneously
Disassembly, cleaning.When plunger rod 320 is positioned at topmost, scrapes at least part of prominent ring 341 of oil jacket 340 and expose plunger rod 320, expose
In fluid.The vibration of fluid can clean groove 344 part put forward between prominent ring 341.Additionally, described plunger rod 320
Sidewall is additionally provided with oil storage tank 350, and this oil storage tank 350 is made up of two curved portions 351 and a protuberance 352, this protuberance 352
Between two described curved portions 351.Part fluid can be stored, it is ensured that plunger rod 320 lubricates in oil storage tank 350.This storage
The arcuate structure of oil groove 350, can avoid stress to concentrate, and improves part durability.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement etc. made, should be included in this utility model
Protection domain within.
Claims (5)
1. improve a diesel injection pump for plunger rod, including the pump housing, plunger matching parts and delivery valve matching parts, the described pump housing
Having plunger cavity, described plunger matching parts includes that plunger bushing and plunger rod, described plunger bushing are fixed in described plunger cavity, this plunger
Bar is slidably disposed in described plunger bushing, and described delivery valve matching parts is positioned at the upper end of described plunger rod, described plunger bushing bag
Including fuel feed hole, the middle part of described plunger rod is provided with centre bore, and the sidewall of this plunger rod is provided with helicla flute, and this helicla flute connects described
Fuel feed hole and centre bore, it is characterised in that described plunger bushing also includes that spill port, the bottom of described centre bore are provided with lower counterbore,
The sidewall of described plunger rod is additionally provided with annular groove, and this annular groove is connected to described lower counterbore through a lateral aperture.
The diesel injection pump improving plunger rod the most according to claim 1, it is characterised in that described lower counterbore straight
Footpath is less than the diameter of described centre bore, and the diameter of described spill port is less than the diameter of described fuel feed hole.
The diesel injection pump improving plunger rod the most according to claim 2, it is characterised in that the side of described plunger rod
Wall is additionally provided with oil storage tank, and this oil storage tank is made up of two curved portions and a protuberance, and this protruding parts is in two described arcs
Between shape portion.
The diesel injection pump improving plunger rod the most according to claim 1, it is characterised in that this diesel injection pump
Also including that camshaft, the described pump housing also have cam chamber, described camshaft is rotatably arranged in described cam chamber.
The diesel injection pump improving plunger rod the most according to claim 1, it is characterised in that this diesel injection pump
Also include controlling oil pull bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620756454.6U CN205876577U (en) | 2016-07-19 | 2016-07-19 | Diesel engine injection pump of plunger rod has been improved |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620756454.6U CN205876577U (en) | 2016-07-19 | 2016-07-19 | Diesel engine injection pump of plunger rod has been improved |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205876577U true CN205876577U (en) | 2017-01-11 |
Family
ID=57697726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620756454.6U Expired - Fee Related CN205876577U (en) | 2016-07-19 | 2016-07-19 | Diesel engine injection pump of plunger rod has been improved |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205876577U (en) |
-
2016
- 2016-07-19 CN CN201620756454.6U patent/CN205876577U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20190719 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |