CN103562550B - The roller tappet of roller tappet, especially piston pump - Google Patents
The roller tappet of roller tappet, especially piston pump Download PDFInfo
- Publication number
- CN103562550B CN103562550B CN201280023430.4A CN201280023430A CN103562550B CN 103562550 B CN103562550 B CN 103562550B CN 201280023430 A CN201280023430 A CN 201280023430A CN 103562550 B CN103562550 B CN 103562550B
- Authority
- CN
- China
- Prior art keywords
- roller
- carriage
- tappet
- roller tappet
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims 1
- 230000006872 improvement Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000005086 pumping Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/06—Cam-followers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
- F01L2305/02—Mounting of rollers
Abstract
The present invention relates to a kind of roller tappet (5), the especially roller tappet of piston pump, wherein, described roller tappet (5) includes the roller (9) interacting with roller carriage (8) and being rotatably mounted.It is an object of the invention to the startability of the roller (9) that improvement is arranged on the roller carriage (8) of roller tappet (5).It is achieved in that described roller (9) includes the pin (17) for being arranged on roller carriage (8), and described roller (9) can adjust relative to described roller carriage (8), until the outer peripheral edge of described roller (9) abuts on described roller carriage (8).
Description
Technical field
The present invention relates to a kind of roller tappet, the especially roller tappet of piston pump, wherein, described roller tappet has the roller rotatably supported, and it interacts with roller carriage.Moreover, it relates to a kind of method optimizing roller supporting in the roller carriage of roller bearing push rod.
Background technology
This roller tappet is such as known from DE102009029297A1.The configuration of this roller tappet is for the high-pressure piston pump of the spraying system of internal combustion engine, and has the roller being bearing in roller carriage of roller tappet.Described roller is configured to cylinder, and utilizes its cylindrical skirt to be bearing in the appropriate section cylinder shape groove of described roller carriage.This structure be configured to make lubricating fuel be transported to aptly between described roller carriage and roller in the region of cavity, with the pressure thus improved in this region and therefore reduce steam bubble formation.
It is further known that, described roller uses pin to be bearing in described roller carriage.For this, described roller has a center elongated hole, and described pin is inserted in the elongated hole of described center.Described pin then utilizes the end regions protruded from described hole to be bearing in described roller carriage.Constructing of described roller tappet has the startability improved than the roller being bearing on its outer peripheral edge.But particularly when to transmit big power, described pin is necessarily constructed as and fastens very much, ensureing predetermined endurance limit.
Summary of the invention
The task of the present invention is in that to improve the startability of the roller on the roller carriage being bearing in roller tappet.
This task is solved by following roller, and namely described roller has a pin for supporting relative to roller carriage, and described roller clings on described roller tappet until the outer peripheral edge of described roller relative to described roller tappet adjustable.Correlation method for optimizing roller supporting in the roller carriage of roller tappet is characterised by, the supporting of described roller can switching between pin supporting and roller rim bearing.Configuration and the advantage of the method according to the invention according to the present invention be: the advantages of two designs are unified on roller tappet, and the shortcomings avoiding two designs.Switching between the supporting of described pin and roller rim bearing enables pin supporting according to the present invention when little power or load are applied on roller tappet, and enables roller rim bearing when big power is applied on roller tappet.Thus, the startability of described roller significantly improves relative to roller rim bearing when less load is applied on described roller tappet, and on the other hand, when high service load, by switch on described roller rim bearing, the supporting of described pin need not transmit big power, and thus can substantially be compactly built.In a word, reach to have the level of the roller tappet of pure pin supporting according to the structure expense of the roller tappet of the present invention, but the advantage that the advantage with the roller tappet of pin supporting combines the push rod with roller rim bearing.Here, under described roller rim bearing situation, in other configuration, described roller utilizes outer peripheral edge to abut in the groove receiving described roller at least in part.
In the improvement project of the present invention, described pin is resiliently supported in described roller carriage.Here, described elastic device can at random construct and such as mechanically or hydraulically to work.Therefore, the lubricant that described hydraulic spring grease cup device such as can be configured to certainly exist is introduced in hydraulic cylinder, and is such as discharged from cushion chamber by valve gear when exceeding predetermined hydraulic pressure pressure, and described cushion chamber is for adjusting described pin relative to described roller carriage.But preferably, described elastic device is mechanical elasticity device, and described mechanical elasticity device uses again the spring of any configuration.Described spring is pushed open described roller when little active force as much as possible by described roller carriage, so that not corresponding to the described roller carriage inner peripheral of the periphery of described roller interacts.On the contrary, when higher active force, described roller is typically toward in roller carriage and moves, so that described roller utilizes the inner peripheral interaction of its outer peripheral edge and the groove with described roller carriage.Here, coordinate this interaction and realize extra hydrodynamic lubrication with the respective configuration by the lubrication gap between described roller and roller carriage.
In another configuration of the present invention, described pin interacts with at least one support, and wherein, described support is relative to described roller carriage adjustable.Here, also in another configuration, described support is removable in the guide allowing access into described roller carriage.This configuration is that machinery is reliable, but here structure and cost are suitably changed.
In another configuration of the present invention, described roller carriage has spring-reception portion in guide on the side deviate from pin.Described spring-reception portion is also configured to the blind hole that can process simply in another configuration of the present invention.Described spring-reception portion especially can use helical spring.Helical spring has the advantage that being able to when meeting and making demands manufactures the helical spring with different coefficient of elasticity simply and at low cost.But it can also be envisaged that within the scope of this invention under hydroelastic system device situation, described blind hole is used as pressure fluid reception cavity.
In the improvement project of the present invention, described support is inserted in described guide enduringly.According to this configuration, described support is inserted in described guide when assembling, so that described support is maintained in described guide by rights, but here for shown switching device motion in described guide.This configuration this have the advantage that, especially when building preassembled roller tappet, described roller tappet constitutes the assembly of robust manipulation.
Preferably, according to, on the roller tappet of the present invention, the end of roller building two supports, for guiding the end protruded from roller of described pin.Here, described roller additionally can rotate relative to described pin, and described pin is firmly clamped at described support.But it can also be envisaged that within the scope of this invention, described pin such as with described roller single type make, and described pin is rotatably supported in two opposite supports.
In the improvement project of the present invention, described roller carriage is arranged to be used in the high-pressure piston pump of fuel injection system.This high-pressure piston pump is configured to the pressure more than 1600bar, and described pressure must be transmitted by described roller tappet when high pressure piston pump operation.
Accompanying drawing explanation
From accompanying drawing, middle other favourable configuration obtaining the present invention is described, describes the embodiments of the invention shown in view in the description of the drawings in detail.
Shown in the drawings:
Fig. 1 illustrates the sectional view through piston pump subregion, and it has the roller tappet being arranged between pump camshaft and pump piston；With
Fig. 2 illustrates the roller tappet according to Fig. 1 with side view.
Detailed description of the invention
Piston pump according to Fig. 1 is the high-pressure pump of the fuel injection system for internal combustion engine, is transported to having the fuel being especially greater than 1600 bars (bar) pressure in high pressure accumulator.Described fuel injection system is configured to the common-rail injection system that fuel is the self-igniting internal combustion engine of diesel oil, and wherein, described high-pressure pump is supplied fuel by low-lift pump from fuel tank.
High-pressure pump has pump case 1, and pump case 1 has pump internal chamber, and wherein, pump camshaft 3 can be rotated to support in pump case 1.Pump camshaft 3 is by rights by internal combustion engine, for instance driven directly or indirectly by its bent axle or its camshaft.Pump camshaft 3 has at least one cam 4, and cam 4 is arranged in pump internal chamber 2.Pump internal chamber 2 is especially full of fuel by low-lift pump, on the one hand for the supporting of lubricating pump camshaft 3 with for continuing to be transferred in the pump work chamber of described piston pump to be transported in described high pressure accumulator.Additionally, in pump case 1, roller tappet 5 can support on linear movement ground, and wherein roller tappet 5 has pusher body 6, and pusher body 6 is movable in the push-rod guide of pump case 1.Pusher body 6 has interior ring flange 7, and roller carriage 8 is supported on interior ring flange 7 in pump camshaft side.Roller carriage 8 and roller 9 interact, and roller 9 rolls on the rolling surface of cam 4.The interaction of roller 9 and roller carriage 8 is described in more detail below.
With pump camshaft 3 relatively, the pump piston 10 with pump piston bearing 11 is supported on roller carriage 8.Pump piston 10 utilizes pump piston bearing 11 to be pressed against roller carriage 8 by pump spring 12 by spring stop 13.Here, pump spring 12 is supported on pumping cylinder lid, and pumping cylinder lid and pumping cylinder 20 are made for single type, and pump piston 10 is movable in pumping cylinder 20 when forming pump work chamber.
The fuel that will carry is by metering units and inlet valve is supplied to described pump work chamber from pump internal chamber 2 and when the drainage stroke of pump piston 10, the fuel being introduced in pump work chamber is continued transported in described high pressure accumulator by check-valves.
When the whole load of pump piston, fuel is corresponding also significantly high from having the load being transferred and acting on roller tappet 5 and pump camshaft 3 more than the pump work chamber of 1600 bars.On the other hand, for instance when internal combustion engine cold start-up, the pressure in high pressure accumulator such as drops to 100 bar level below, and under operation, described load is also correspondingly low.Furthermore, it is noted that also when this fuel-stress level, internal combustion engine can start.But here, just under this startup optimization state of internal combustion engine and high-pressure pump, it is ensured that constitute between the mutual motion parts of described high-pressure pump suitable and reliably lubricating oil film be important.Additionally, high-pressure pump or roller tappet 5 have following mechanism, described mechanism is the supporting of switching roller 9 between pin supporting and roller rim bearing when low-voltage load.
This mechanism has two moveable supports 14 of power overcoming each spring 15 in roller carriage 8, and support 14 is respectively provided with a support holes 16 for pin 17 on the side towards pump camshaft 3.Pin 17 extends through roller 9 along jackshaft and forms the supporting of roller 9 when more underload, additionally, support 14 may move and as in figure 2 it is shown, generally extruded from the groove 19 of cylindrical section shape by roller 9 respectively in guide 18, thus the outer peripheral edge of roller 9 does not contact with groove 19.But roller 9 is supported by pin 17 uniquely under this running status.Here, between roller 9 and pin 17 or but can be movable relatively between two support holes 16 in pin 17 and support 14.This configuration ensures good startability and the mutual proper lubrication of component.When higher load to be passed, roller 9 is squeezed on groove 19 in groove 19, until abutting on the outer peripheral edge of roller 9, wherein, support 14 overcomes the power of spring 15 to be pressed in guide 18.Under this running status, the high load capacity of roller 9 also easily transmits the supporting of power and realizes uniquely in groove 19, and roller 9 is by the approximate idle running ground run-in synchronism of the supporting of pin 17.
Claims (12)
1. roller tappet (5), wherein, described roller tappet (5) has roller carriage (8) and the roller (9) interacting with roller carriage (8) and rotatably supporting, it is characterized in that, described roller (9) has the pin (17) for supporting relative to roller carriage (8), and described roller (9) is relative to described roller carriage (8) adjustable, until the outer peripheral edge of roller (9) abuts on described roller carriage (8).
2. roller tappet according to claim 1, it is characterised in that described roller (9) utilizes outer peripheral edge to abut in the groove (19) of the described roller of reception at least in part (9) of roller carriage (8).
3. roller tappet according to claim 1 and 2, it is characterised in that described pin (17) is resiliently supported on described roller carriage (8).
4. roller tappet according to claim 1 and 2, it is characterized in that, described pin (17) interacts with at least one support (14), and described support (14) is relative to described roller carriage (8) adjustable.
5. roller tappet according to claim 4, it is characterised in that removable in the described support (14) guide (18) in being inserted into roller carriage (8).
6. roller tappet according to claim 4, it is characterised in that described roller carriage (8) has spring-reception portion in guide (18) on the side deviating from described pin (17).
7. roller tappet according to claim 6, it is characterised in that described spring-reception portion is blind hole.
8. roller tappet according to claim 4, it is characterised in that described support (14) is movably inserted in guide (18).
9. roller tappet according to claim 4, it is characterised in that described support (14) is made up of metal material.
10. roller tappet according to claim 1 and 2, it is characterised in that described roller tappet is the roller tappet of piston pump.
11. be used on the high-pressure pump of fuel injection system according to roller tappet in any one of the preceding claims wherein.
12. the method being used for the supporting optimizing roller (9) in the roller carriage (8) of roller tappet (5), it is characterised in that the supporting of described roller (9) can switching between pin supporting and roller rim bearing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011076022A DE102011076022A1 (en) | 2011-05-18 | 2011-05-18 | Roller tappet, in particular a piston pump |
| DE102011076022.9 | 2011-05-18 | ||
| PCT/EP2012/057768 WO2012156195A1 (en) | 2011-05-18 | 2012-04-27 | Roller tappet, in particular of a reciprocating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103562550A CN103562550A (en) | 2014-02-05 |
| CN103562550B true CN103562550B (en) | 2016-07-20 |
Family
ID=46017880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280023430.4A Expired - Fee Related CN103562550B (en) | 2011-05-18 | 2012-04-27 | The roller tappet of roller tappet, especially piston pump |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103562550B (en) |
| DE (1) | DE102011076022A1 (en) |
| WO (1) | WO2012156195A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014218489A1 (en) * | 2014-09-15 | 2016-03-17 | Robert Bosch Gmbh | piston pump |
| EP3026231B1 (en) * | 2014-11-27 | 2020-08-12 | Aktiebolaget SKF | Mechanical system forming a cam follower or a rocker arm, injection pump or valve actuator comprising such a mechanical system and method for manufacturing such a mechanical system |
| GB2542349A (en) * | 2015-09-15 | 2017-03-22 | Gm Global Tech Operations Llc | Fuel unit pump and internal combustion engine comprising it |
| GB2543354A (en) * | 2015-10-16 | 2017-04-19 | Gm Global Tech Operations Llc | Roller tappet for a fuel unit pump of an internal combustion engine |
| DE102018207458A1 (en) * | 2018-05-15 | 2019-11-21 | Mahle International Gmbh | Bearing arrangement of a cam roller of a valve train |
| DE102019216165A1 (en) * | 2019-10-21 | 2021-04-22 | Robert Bosch Gmbh | Roller tappet for a piston pump, piston pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389858A (en) * | 2006-02-20 | 2009-03-18 | 罗伯特·博世有限公司 | High pressure pump in particular for a fuel injection device on an internal combustion engine |
| CN101523044A (en) * | 2006-09-28 | 2009-09-02 | 罗伯特·博世有限公司 | Tappet assembly for a high-pressure pump and high-pressure pump comprising at least one tappet assembly |
| CN101529082A (en) * | 2006-10-16 | 2009-09-09 | 罗伯特·博世有限公司 | Piston pump, in particular fuel pump, having roller tappet |
| DE102008002178A1 (en) * | 2008-06-03 | 2009-12-10 | Robert Bosch Gmbh | High-pressure pump i.e. radial or row piston pump, for fuel injection system of air-compressing, self-igniting internal-combustion engine, has anti-twist protection pin whose end is intervened in cylinder head |
| DE102009001108A1 (en) * | 2009-02-24 | 2010-08-26 | Robert Bosch Gmbh | High-pressure piston pump for use as radial piston pump for fuel injecting mechanism of internal combustion engine of motor vehicle, has body with radially outward aligned truncation edge-freely connected to inner surface |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3034363A (en) * | 1958-12-13 | 1962-05-15 | Bosch Gmbh Robert | Cam drive |
| IT208171Z2 (en) * | 1986-07-29 | 1988-04-11 | Weber Spa | CAMERING DEVICE |
| DE4227854B4 (en) * | 1992-08-22 | 2005-12-15 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
| JP2008163816A (en) * | 2006-12-27 | 2008-07-17 | Denso Corp | Cam mechanism mounting device |
| DE102009029297A1 (en) | 2009-09-09 | 2011-03-10 | Robert Bosch Gmbh | Piston pump, particularly high-pressure pump for fuel injection device of internal combustion engine, comprises pump piston, which is adjustably guided to shaft in radial manner |
-
2011
- 2011-05-18 DE DE102011076022A patent/DE102011076022A1/en not_active Withdrawn
-
2012
- 2012-04-27 WO PCT/EP2012/057768 patent/WO2012156195A1/en active Application Filing
- 2012-04-27 CN CN201280023430.4A patent/CN103562550B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101389858A (en) * | 2006-02-20 | 2009-03-18 | 罗伯特·博世有限公司 | High pressure pump in particular for a fuel injection device on an internal combustion engine |
| CN101523044A (en) * | 2006-09-28 | 2009-09-02 | 罗伯特·博世有限公司 | Tappet assembly for a high-pressure pump and high-pressure pump comprising at least one tappet assembly |
| CN101529082A (en) * | 2006-10-16 | 2009-09-09 | 罗伯特·博世有限公司 | Piston pump, in particular fuel pump, having roller tappet |
| DE102008002178A1 (en) * | 2008-06-03 | 2009-12-10 | Robert Bosch Gmbh | High-pressure pump i.e. radial or row piston pump, for fuel injection system of air-compressing, self-igniting internal-combustion engine, has anti-twist protection pin whose end is intervened in cylinder head |
| DE102009001108A1 (en) * | 2009-02-24 | 2010-08-26 | Robert Bosch Gmbh | High-pressure piston pump for use as radial piston pump for fuel injecting mechanism of internal combustion engine of motor vehicle, has body with radially outward aligned truncation edge-freely connected to inner surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103562550A (en) | 2014-02-05 |
| DE102011076022A1 (en) | 2012-11-22 |
| WO2012156195A1 (en) | 2012-11-22 |
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| 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: 20160720 Termination date: 20190427 |