CN102395788A - Piston pump having cam drive, particularly a fuel pump - Google Patents
Piston pump having cam drive, particularly a fuel pump Download PDFInfo
- Publication number
- CN102395788A CN102395788A CN2010800170002A CN201080017000A CN102395788A CN 102395788 A CN102395788 A CN 102395788A CN 2010800170002 A CN2010800170002 A CN 2010800170002A CN 201080017000 A CN201080017000 A CN 201080017000A CN 102395788 A CN102395788 A CN 102395788A
- Authority
- CN
- China
- Prior art keywords
- cam
- dead slot
- reciprocating pump
- pump
- heavy
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0439—Supporting or guiding means for the pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to a piston pump (10), particularly a fuel pump, having a shaft (12), at least one cam (14) arranged thereon, a piston, and a roller (20) arranged between the piston and the cam (14) for rolling on the cam (14), wherein on at least one face of the cam (14), an undercut-like recess (16) is provided.
Description
Technical field
The present invention relates to a kind of according to claim 1 reciprocating pump as described in the preamble, especially petrolift.
Background technique
The petrolift of internal-combustion engine is known by market, and they are constructed to reciprocating pump and operate through cam driving gear.In some internal-combustion engines of Motor Vehicle, petrolift also is constructed to so-called " plug-in pump ".As plug-in pump, pump module is inserted in the opening in the cluster engine of internal-combustion engine for example.A kind of mode of execution has been described in DE 10 2,006 045 933, one of them in the roller supports that connects between cam and the piston in the rolling boots.For tolerance compensating, the rolling boots of pair of rollers guiding can be supported a little obliquely, thereby avoid corner angle to support, and that is to say the excessive pressure loading of having avoided on the seamed edge of the shell surface of cam and end face.
Summary of the invention
Task of the present invention is, improves the operation of petrolift, especially prolongs the working life of petrolift.
This task is through the device solves according to claim 1.Favourable expanded configuration provides in the dependent claims.To the important characteristic of the present invention in addition in below the specification and find in the accompanying drawings, wherein, these characteristics need not to spell out once more not only individually but also to be various combination ground possibly be important for the purpose of the present invention for this reason.
Because the manufacturing inaccuracy of roller or cam; Perhaps because the spin axis of the axle of roller and supporting cam wheel is not just in time parallel; Possibly in the zone of the radially-outer surface of cam, at first form high pressure stress on the edge at cam; These high pressure stress are not having to cause so-called " corner angle support ", i.e. the indenture shape in the cam outer face or the Roughness of angular under the situation of counter-measure.Avoid or reduced at least significantly the formation of such corner angle support through measure according to the present invention.Because the tolerance of the reason that the formation corner angle support is very little mostly, be the heavy corresponding little and local effectively adaptive compensation that enough is used for of cutting the dead slot form of shape (freistichartig) at least one end face of cam arranged according to the present invention.At this, utilize the elasticity of employed metallic material, especially steel to reduce in the lateral edge region generating rigidity of cam.Even we can say, can in the zone of cam seamed edge, produce to a certain degree " deformability of spring " according to the present invention with respect to roller.Therefore need and not make cam wideer for fear of the corner angle support.In this way, the inexactness that in the cooperatively interacting of roller and cam, is caused by manufacturing is not damaged the fatigue strength of reciprocating pump to a great extent.Therefore, the working life of reciprocating pump, raising and its operation improved.
Suggestion in addition, the heavy dead slot that cuts shape radially inwardly extends the radially-outer surface up to axle.Save quality thus, and can simplify heavy manufacturing of cutting the dead slot of shape.
Another kind of design proposal is that the heavy dead slot that cuts shape has a cross section rectangle, trapezoidal or circle.Can make the heavy rigidity of cutting the generation of shape dead slot of passing through in cam lateral edge zone reduce optimally suitable through differing formed cross section with the certain loads situation of reciprocating pump.The heavy rectangular cross section that cuts the dead slot of shape can be made at this especially simply.When the trapezoidal cross-section of the heavy dead slot that cuts shape, rigidity reduce substantial linear ground axle vertically on change, thereby although stress peak can be reduced when manufacturability is simple.Best fatigue strength realizes through (for example circular or oval-shaped) of circle or the cross section of strong rounding, because especially when violent dynamic load, avoided high pressure stress or tensile stress in the zone of the heavy dead slot that cuts shape.
The present invention stipulates that cam configuration is single cam, double-cam or three cams in addition, although also can realize having the reciprocating pump of high transmission power thus in working life under the good situation.
Another kind of design proposal is that the heavy dead slot that cuts shape only is arranged in the part area of said end face.Can consider that thus according to the angle of swing of cam, different power and loading are on cam or roller.Through this design proposal can make heavy geometrical shape of cutting the dead slot of shape optimally adapt to the angle of swing of cam and the work with driven reciprocating pump of optimally adapting to than corresponding load.
A kind of specially suitable application scenarios of the present invention is a plug-in pump, and they can be inserted in the opening of the drive unit housing of internal-combustion engine for example.Such plug-in pump is applied in the internal-combustion engine of Motor Vehicle and is a kind of with low cost and solution flexibly.
Description of drawings
Set forth exemplary mode of execution of the present invention with reference to the accompanying drawings.Use identical reference character at this assembly with parameter for function equivalent.Shown in the drawings:
Fig. 1 has the partial sectional view of part area of reciprocating pump first mode of execution of single cam;
Fig. 2 has the partial sectional view of the part area of two-jawed reciprocating pump second mode of execution;
Fig. 3 has the sectional view of live axle of reciprocating pump the 3rd mode of execution of single cam;
Fig. 4 has a single cam and the heavy partial, longitudinal cross-sectional of cutting the axle of shape dead slot with rectangular cross section in this list cam face;
Fig. 5 is similar to the heavy view that cuts the shape dead slot with trapezoidal cross-section in single cam face that has of Fig. 4;
Fig. 6 is similar to the heavy view that cuts the shape dead slot with circle cross-section in single cam face that has of Fig. 4.
Embodiment
Fig. 1 illustrates the part of reciprocating pump 10 with phantom, like it using in the internal-combustion engine of Motor Vehicle.Be arranged on prejudicially on this axle at 12, one cams 14 of a cut in the axial direction axle shown in the part of the bottom of this figure, this cam has the cross section of a circular.In the observer's of Fig. 1 end face, process a heavy dead slot 16 that cuts shape at this cam 14; This dead slot sees to have small depth on the axial direction of axle 12, in this end face of cam 14 and the transition region between the radially-outer surface, form an axially extended dividing plate 18 through this dead slot.Opposed end face is likewise constructed.In Fig. 1, above cam 14, be provided with a columniform roller 20, this roller is along a common bus contact cam 14.Roller 20 has roughly suitable with the width of cam 14 axial length, and this roller leads in rolling boots 22 with the one of which semi-circumference approximately.These rolling boots 22 are directed to sleeve 24 and keep, and this pilot sleeve has the hollow cylinder shape that both sides are opened wide basically.Helical spring 26 acts on one and in Fig. 1, is arranged on above the dividing plate on pilot sleeve 24 underparts, that radially extend.A piston 28 is supported on these rolling boots 22, and this piston is directed in a housing 30 movably, and another end portion, supports of helical spring 26 is on this housing.Pilot sleeve 24 is columniform and go up guiding with piston 28 concentric convexities (not having reference character) of housing 30.Hole 32 in the housing 30 can be implemented in during the piston motion being enclosed in the pressure compensation in the space between rolling boots 22, pilot sleeve 24, housing 30 and the piston 28.
Be in operation, the cycle that the eccentric motion of cam 14 is responsible for piston 28 drives.Roller 20 causes the power transmission of the low wearing and tearing of cam 14 to rolling boots 22 at this.At this, roller 20 continuously and low frictionally on the radially-outer surface of cam 14, roll, and roller 20 is supported in rolling boots 22 slidably.At this, from the lower dead centre shown in Fig. 1, helical spring 26 is compressed simultaneously.After the unshowned upper dead center switching-over from, the helical spring 26 of expansion causes the joint of the force closure of rolling boots 22, roller 20 and cam 14 during moving downward.
Realize that through the heavy dead slot 16 that cuts shape local rigidity reduces, roller 20 is only still supported by dividing plate 18 in the fringe region of the side direction of cam 14.Through the rigidity that reduces, the fringe region of this side direction can be made a concession when between cam 14 and roller 20, parallelism error occurring, avoids forming so-called corner angle thus and supports, be i.e. the Roughness of corrugated in the surface of cam 14 and/or angular.
Fig. 2 illustrates the sectional view of the part of second mode of execution with oval two-jawed reciprocating pump 10.Also see a heavy dead slot 16 and a dividing plate 18 that forms thus that cuts shape in observer's the end face at cam 14 here.According to one measured in the circumferential direction and characterize the geometry of the cam 14 angle
apparently undercut empty slot 16 has a shape and angle
related to the size of 34.A size 36 that equally also can be dividing plate 18 is relevant with angle
.
During the revolution that is configured to two-jawed cam 14, obtain two complete work tempos of reciprocating pump 10 and frequency of okperation is doubled with respect to the operation of single cam.
Fig. 3 illustrate have one different with Fig. 1 be not circular but the sectional view of the live axle 12 of reciprocating pump 10 the 3rd mode of execution of single cam 14 of substantially elliptical.Cam 14 carries out the transition to the round-shaped of axle 12 in its bottom part in Fig. 3.The top part of cam 14 comprises the heavy dividing plate 18 that cuts the dead slot 16 of shape and form thus again.
During the revolution of cam 14, obtain the complete work tempo of reciprocating pump 10.
Fig. 4 illustrates the side view of axle 12 together with the partly cut-away of cam 14, and this cam configuration is single cam and unit current and an integral body of axle 12 formation.A roller 20 is shown above cam 14, and this roller has a forming section radial symmetric, convex surface (not being with reference character) on two end faces.Can find out the not only heavy cross section that cuts the dead slot 16 of shape but also have rectangle through the dividing plate 18 that the heavy dead slot 16 that cuts shape forms.
What can expect in addition is that irrelevant with the embodiment of cam, additional ground or conversion ground are provided with a heavy dead slot that cuts shape with respective action on roller 20, support to avoid corner angle.
Claims (6)
1. reciprocating pump (10), especially petrolift; Comprise an axle (12), at least one is arranged on cam (14) on this, piston and one and is arranged on being used between piston and the cam (14) and goes up the roller (20) that rolls at this cam (14); It is characterized in that, at least one end face of this cam (14), be provided with the heavy dead slot (16) that cuts shape.
2. reciprocating pump according to claim 1 (10) is characterized in that, the said heavy dead slot (16) that cuts shape radially inwardly extends the radially-outer surface up to said axle (12).
3. according to each described reciprocating pump (10) in the above claim, it is characterized in that the said heavy dead slot (16) that cuts shape has cross section rectangle, trapezoidal or circle.
4. according to each described reciprocating pump (10) in the above claim, it is characterized in that said cam (14) is configured to single cam, double-cam or three cams.
5. according to each described reciprocating pump (10) in the above claim, it is characterized in that the said heavy dead slot (16) that cuts shape only exists in a part area of said end face.
6. according to each described reciprocating pump (10) in the above claim, it is characterized in that said reciprocating pump is a plug-in pump, this plug-in pump can be inserted in the opening of actuator housing.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910002434 DE102009002434A1 (en) | 2009-04-16 | 2009-04-16 | Piston pump, in particular fuel pump |
DE102009002434.4 | 2009-04-16 | ||
PCT/EP2010/051955 WO2010118903A1 (en) | 2009-04-16 | 2010-02-17 | Piston pump having cam drive, particularly a fuel pump |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102395788A true CN102395788A (en) | 2012-03-28 |
CN102395788B CN102395788B (en) | 2014-10-29 |
Family
ID=42066334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201080017000.2A Expired - Fee Related CN102395788B (en) | 2009-04-16 | 2010-02-17 | Piston pump having cam drive, particularly a fuel pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2419635B1 (en) |
CN (1) | CN102395788B (en) |
DE (1) | DE102009002434A1 (en) |
WO (1) | WO2010118903A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110291287A (en) * | 2016-12-13 | 2019-09-27 | 德尔福知识产权有限公司 | Cam-actuated petrolift |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6102767B2 (en) * | 2014-01-24 | 2017-03-29 | 株式会社デンソー | High pressure fuel pump |
DE102014220384B4 (en) * | 2014-10-08 | 2021-02-18 | Vitesco Technologies GmbH | High pressure fuel pump and drive shaft |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2200062Y (en) * | 1994-06-03 | 1995-06-07 | 孙玉山 | Multipurpose air pump for bicycle |
US5947699A (en) * | 1996-07-22 | 1999-09-07 | Lucas Industries Plc | Electromagnetically controlled radial piston pump |
US20020104514A1 (en) * | 2001-02-07 | 2002-08-08 | Katsumi Mori | Fuel injection pump |
EP1413749A2 (en) * | 2002-10-25 | 2004-04-28 | Delphi Technologies, Inc. | Fuel pump assembly |
DE102005047234A1 (en) * | 2005-10-01 | 2007-04-05 | Schaeffler Kg | Roller tappet for internal combustion engine, has tappet roller for transverse-force free actuation of pump plunger, where load capacity and life span of tappet are increased with constant outer diameter of roller by broadening roller |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3247026A1 (en) * | 1982-12-18 | 1984-06-20 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Elastic roller tappet |
DE102006045933A1 (en) | 2006-09-28 | 2008-04-03 | Robert Bosch Gmbh | Plunger assembly for a high pressure pump and high pressure pump with at least one plunger assembly |
-
2009
- 2009-04-16 DE DE200910002434 patent/DE102009002434A1/en not_active Withdrawn
-
2010
- 2010-02-17 CN CN201080017000.2A patent/CN102395788B/en not_active Expired - Fee Related
- 2010-02-17 EP EP10704561.9A patent/EP2419635B1/en not_active Not-in-force
- 2010-02-17 WO PCT/EP2010/051955 patent/WO2010118903A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2200062Y (en) * | 1994-06-03 | 1995-06-07 | 孙玉山 | Multipurpose air pump for bicycle |
US5947699A (en) * | 1996-07-22 | 1999-09-07 | Lucas Industries Plc | Electromagnetically controlled radial piston pump |
US20020104514A1 (en) * | 2001-02-07 | 2002-08-08 | Katsumi Mori | Fuel injection pump |
EP1413749A2 (en) * | 2002-10-25 | 2004-04-28 | Delphi Technologies, Inc. | Fuel pump assembly |
DE102005047234A1 (en) * | 2005-10-01 | 2007-04-05 | Schaeffler Kg | Roller tappet for internal combustion engine, has tappet roller for transverse-force free actuation of pump plunger, where load capacity and life span of tappet are increased with constant outer diameter of roller by broadening roller |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110291287A (en) * | 2016-12-13 | 2019-09-27 | 德尔福知识产权有限公司 | Cam-actuated petrolift |
Also Published As
Publication number | Publication date |
---|---|
CN102395788B (en) | 2014-10-29 |
DE102009002434A1 (en) | 2010-10-21 |
WO2010118903A1 (en) | 2010-10-21 |
EP2419635A1 (en) | 2012-02-22 |
EP2419635B1 (en) | 2013-04-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20080310787A1 (en) | Rolling bearing apparatus | |
CN104662291B (en) | Method for assembling a push rod | |
CN103370550B (en) | For the bearing means of reciprocating type refrigeration compressor | |
CN102395788B (en) | Piston pump having cam drive, particularly a fuel pump | |
CN108474463A (en) | Elastic gear of harmonic drive mechanism | |
US9863382B2 (en) | High pressure oil pump roller tappet | |
CN100564928C (en) | The spring seat that is used for vibration damper | |
CN205383174U (en) | Bent axle adaptor, crankshaft flywheel assembly structure of group and engine | |
US20160201717A1 (en) | Double-link piston crank mechanism for internal combustion engine | |
CN102713372B (en) | Pin bosses of a piston for an internal combustion engine | |
US9334956B2 (en) | Piston unit | |
CN103133598A (en) | Balancing shaft | |
KR20140133866A (en) | Method and tool for increasing the strength of shafts, in particular of crankshafts | |
FI122894B (en) | Piston bearing arrangement | |
CN101896744A (en) | Pin boss and piston having the same, for an internal combustion engine | |
CN201330792Y (en) | Connecting rod of gasoline engine | |
CN201651234U (en) | One-way clutch belt pulley for engine mechanical pressure booster | |
CN105526167A (en) | Compression mechanism for rotary compressor, and rotary compressor with same | |
US20080302207A1 (en) | Crankshaft | |
CN200995319Y (en) | Oscillating mechanism of roller hyperfine machine | |
CN209539810U (en) | 10 cylinder diesel crankshaft of V-type | |
CN203008982U (en) | Chain guide plate structure for engine timing chain system | |
CN206801746U (en) | Engine high-pressure oil pump roller tappet | |
CN101990600A (en) | High-pressure pump arrangement having a single-plunger high-pressure pump | |
CN109630538A (en) | 16 cylinder diesel crankshaft of V-type |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20220217 |