CN2663678Y - High power type oil spout pump assembly - Google Patents
High power type oil spout pump assembly Download PDFInfo
- Publication number
- CN2663678Y CN2663678Y CN 03256029 CN03256029U CN2663678Y CN 2663678 Y CN2663678 Y CN 2663678Y CN 03256029 CN03256029 CN 03256029 CN 03256029 U CN03256029 U CN 03256029U CN 2663678 Y CN2663678 Y CN 2663678Y
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- CN
- China
- Prior art keywords
- roller
- oil
- spring
- pump
- pin
- 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 relates to a plunger piston type diesel engine oil spout pump, in particular to a high power type oil spout pump assembly for enlarging tank central distance L and diameter of a plunger piston. A plunder piston spring (7) is a steel wire spiral spring with an oval section. A rolling wheel (12) is directly arranged on a rolling wheel pin (13) which is positioned in axial direction through a rolling wheel spring (15) arranged on the rolling wheel pin. A longitude rectangle positioning slot (10) is arranged on the outer side face of a straight pole (11). The end of a positioning bolt (9) arranged on a pump (1) is inserted into the positioning slot to limit the rotation of the straight pole. The pump (1) is provided with an oil deflector (4) and is communicated with an oil return hole (2) of a plunger piston sheath (6). The oil spout pump with the structure can suit the working requirements of high pressure spray while the tank central distance L is equal to 35mm and the diameter of the plunger piston is equal to 12mm, and the oil spout pressure reaches 120MPa, thereby reducing the oil consumption rate and waste gas discharging of the diesel engine.
Description
One. technical field
The utility model relates to a kind of plunger type diesel engine fuel oil Injection Pump.
Two. technical background
As everyone knows, the plunger type diesel injection pump is the important oil-fired system parts that influence diesel engine work.The perfect match of diesel engine and Injection Pump is to reduce the oil consumption of diesel engine and the essential technique measure of harmful exhaust discharging.Particularly contemporary high-speed diesel fuel machine technology, when being used for mobile power unit, truck for example, city bus and large-scale engineering machinery etc., diesel engine harmful exhaust exhaust index just is being subjected to the strict day by day restriction of environmental regulation.So the engineer reduces noxious emission in order to improve power, satisfies the environmental regulation requirement, constantly carrying out the architecture advances design of Injection Pump, to realize having the reinforcement Injection Pump of high-pressure injection.But the piston spring cross section of Injection Pump is circle or rectangle pressure spring at present, tappet body location adopts bi-side to polish, on the pump housing, insert the straight pin location, spill port is installed the retaining oil cap on the plunger bushing, this structure makes in the limited design space of fuel injection pump housing, be difficult to improve the intensity and the Injection Pump end pressure (working pressure) of Injection Pump, thereby reach the realization high-pressure injection, improve diesel engine power and reduce the purpose that harmful exhaust discharges.
Three. summary of the invention
Basic principle of the present utility model is to strengthen cylinder core distance L and plunger diameter, take to improve piston spring simultaneously, the structural design of tappet body and plunger bushing improves the working strength and the reliability of Injection Pump, finally reaches the requirement that improves the diesel engine match power and satisfy high-pressure injection.
The utility model is achieved in that the strong injection pump assembly, by the pump housing, plunger, plunger bushing, roller pin, roller, the tappet body, cam of injection pump, piston spring, spring seat is formed, strengthen cylinder core distance L and plunger diameter, piston spring is an oval cross section steel wire helical spring, at tappet body inwall, the roller groove and the cavity that spring groove constituted on the roller pin that are positioned on the roller end face are equipped with a roller snap, roller directly is installed on the roller pin, roller pin and roller, be between tappet body two pin-and-holes and be slidingly matched, have a longitudinal register groove on the external side of tappet, being installed on the location of one on pump housing screw end inserts in the locating slot, oil-return groove is arranged on the pump housing, communicate with the spill port of plunger bushing, oil deflector is installed in the oil-return groove.
Above-mentioned strong injection pump assembly, cylinder core distance L=35 millimeter, maximum plunger diameter are 12 millimeters.
Above-mentioned strong injection pump assembly, roller snap are circular section split ring steel wire.
The utility model has compared with prior art improved the working strength and the rigidity of piston spring, has cancelled roller bush, has increased roller pin diameter and width, and the pump housing is easy to process simultaneously, and intensity increases, thereby makes Injection Pump can realize high-pressure injection.
Four. description of drawings
Fig. 1 is a strong injection pump assembly schematic representation; Fig. 2 is the A-A sectional view of Fig. 1; Fig. 3 is the local enlarged diagram of the B portion of Fig. 1.
Among the figure, 1 is the pump housing, and 2 is spill port, and 3 is oil-return groove, 4 is oil deflector, and 5 is plunger, and 6 is plunger bushing, 7 is piston spring, and 8 is spring seat, and 9 is positioning screwn, 10 is locating slot, and 11 is the tappet body, and 12 is roller, 13 is roller pin, and 14 is cam of injection pump, and 15 is the roller snap, 16 is locking tray, and 17 is tappet body inwall, and 18 is roller groove.
Five. preferred forms
Be further described below in conjunction with accompanying drawing and embodiment.
Referring to Fig. 1,2,3, the strong injection pump assembly is called for short the PX pump, is installed on the tappet body 11 in the pump housing 1, by cam of injection pump 14, and roller 12, the effect of piston spring 7 and spring seat 8 promotes plunger 5 and moves up and down in plunger bushing 6.Roller 12 directly is installed on the roller pin 13, between roller pin 13 and the roller 12, is between tappet body 11 both sides endoporus and the roller pin 13 and is slidingly matched.At tappet body inwall 17, be positioned at the cross section cavity volume that roller groove 18 on roller 12 end faces and the locking tray 16 on the roller pin 13 are constituted, the roller snap 15 that the split ring steel wire of a circular section is made is installed, pair roller pin 13 carries out axially locating.On tappet body 11 outer side surfaces, have a vertical rectangle locating slot 10, be installed on screw 9 ends, the location of one on the pump housing 1 and insert in the locating slot 10, tappet body 11 is rotated at the Shi Buhui that moves up and down.Oil-return groove 3 is arranged on the pump housing 1, communicate, oil deflector 4 is installed in the oil-return groove 3 with the spill port 2 of plunger bushing 5.Piston spring 7 is an oval cross section steel wire helical spring, has increased the diameter and the width of roller 12 and roller pin 13, makes the pump housing 1 easy to process, and intensity increases, reliable operation, and the ability to work of piston spring 7 and rigidity increase.At the cylinder core distance L=35 of plunger type diesel fuel injection pump millimeter, plunger 4 diameters are 12 millimeters, roller 12 external diameters are 22 millimeters, roller pin 13 diameters are 12 millimeters, when cam of injection pump 14 lifts are 14 millimeters, this pump can adapt to the raising injection pressure and reach 120MPa, realizes high-pressure injection, and the discharging of diesel engine fuel consumption rate and harmful exhaust is obviously descended.
Claims (2)
1, a kind of strong injection pump assembly, by the pump housing (1), plunger (5), plunger bushing (6), roller pin (13), roller (12), tappet body (11), cam of injection pump (14), piston spring (7), spring seat (8) is formed, it is characterized in that cylinder core distance L=35 millimeter, plunger diameter is 12 millimeters, piston spring (7) is an oval cross section steel wire helical spring, at tappet body inwall (17), be positioned at the cavity that roller groove (18) on roller (12) end face and the spring groove (16) on the roller pin (13) constituted one roller snap (15) is installed, roller (12) directly is installed on the roller pin (13), roller pin (13) and roller (12), be between tappet body (11) two pin-and-holes and be slidingly matched, have a longitudinal register groove (10) on tappet body (11) outer side surface, being installed on screw (9) end, the location of one on the pump housing (1) inserts in the locating slot (10), oil-return groove (3) is arranged on the pump housing (1), communicate with the spill port (2) of plunger bushing (6), oil deflector (4) is installed in the oil-return groove (3).
2, strong injection pump assembly according to claim 1 is characterized in that roller snap (15) is a circular section split ring steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256029 CN2663678Y (en) | 2003-07-28 | 2003-07-28 | High power type oil spout pump assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03256029 CN2663678Y (en) | 2003-07-28 | 2003-07-28 | High power type oil spout pump assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2663678Y true CN2663678Y (en) | 2004-12-15 |
Family
ID=34328708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03256029 Expired - Fee Related CN2663678Y (en) | 2003-07-28 | 2003-07-28 | High power type oil spout pump assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2663678Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1966967B (en) * | 2005-11-16 | 2012-03-21 | 株式会社日立制作所 | High-pressure fuel pump |
| WO2012065569A1 (en) * | 2010-11-18 | 2012-05-24 | Robert Bosch Gmbh | High-pressure fuel pump |
| CN102506000A (en) * | 2011-12-31 | 2012-06-20 | 中国兵器工业集团第七○研究所 | Pressure lubricating integral barrel-shaped tappet device |
| CN103201499A (en) * | 2010-11-05 | 2013-07-10 | 罗伯特·博世有限公司 | Pump, in particular high-pressure fuel pump |
-
2003
- 2003-07-28 CN CN 03256029 patent/CN2663678Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1966967B (en) * | 2005-11-16 | 2012-03-21 | 株式会社日立制作所 | High-pressure fuel pump |
| CN103201499A (en) * | 2010-11-05 | 2013-07-10 | 罗伯特·博世有限公司 | Pump, in particular high-pressure fuel pump |
| CN103201499B (en) * | 2010-11-05 | 2016-10-05 | 罗伯特·博世有限公司 | Pump |
| WO2012065569A1 (en) * | 2010-11-18 | 2012-05-24 | Robert Bosch Gmbh | High-pressure fuel pump |
| CN102506000A (en) * | 2011-12-31 | 2012-06-20 | 中国兵器工业集团第七○研究所 | Pressure lubricating integral barrel-shaped tappet device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |