CN104053867B - Driving means - Google Patents
Driving means Download PDFInfo
- Publication number
- CN104053867B CN104053867B CN201180075901.1A CN201180075901A CN104053867B CN 104053867 B CN104053867 B CN 104053867B CN 201180075901 A CN201180075901 A CN 201180075901A CN 104053867 B CN104053867 B CN 104053867B
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- China
- Prior art keywords
- rocking arm
- force
- driving means
- cam
- application part
- 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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- 230000006835 compression Effects 0.000 claims description 39
- 238000007906 compression Methods 0.000 claims description 39
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims 1
- 239000000806 elastomer Substances 0.000 claims 1
- 239000000446 fuel Substances 0.000 description 35
- 230000035939 shock Effects 0.000 description 13
- 230000002159 abnormal effect Effects 0.000 description 11
- 238000010009 beating Methods 0.000 description 10
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- 238000002485 combustion reaction Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 230000001629 suppression Effects 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 230000001771 impaired effect Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 210000000481 breast Anatomy 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001144 postural effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- 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
- F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
- F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
-
- 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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- 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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/366—Valves being actuated electrically
- F02M59/367—Pump inlet valves of the check valve type being open when actuated
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention provides a kind of driving means, and it possesses: drive cam (21)；Rocking arm (22), it swings corresponding to the rotation of described driving cam (21)；Rocking arm supporting device (23), its with drive cam (21) co-operating and to rocking arm (22) can support in the way of swinging, and described driving means makes driven member (12) move back and forth on the swaying direction of rocking arm (22), the swing end (22a) of rocking arm (22) is exerted a force by described driven member (12) near the direction driving cam (21), in described driving means, rocking arm supporting device (23) has: pivotal parts (25), the base end part (22b) of rocking arm (22) is supported in the way of swinging freely by it；Supporting parts (24), it is fixed with pivotal parts (25)；Force application part (27), it supports in swing end (22a) side supported member (24) of rocking arm (22), and exerts a force the swing end (22a) of rocking arm (22) to the side of swaying direction.
Description
Technical field
The present invention relates to a kind of driving means making driven member move back and forth by rocking arm, particularly relate to one
Plant the driving being suitable to the high pressure fuel pump that the fuel of internal combustion engine is pressurised into the high pressure that can directly spray is driven
Device.
Background technology
The driving means possessing rocking arm swings by making rocking arm correspond to rotate input such that it is able to make to be sticked in
The driven member of this rocking arm moves back and forth.Although such driving means is widely used in the valve machine of internal combustion engine
Structure but it also may be applicable to other device, such as, make plunger move back and forth and the fuel of internal combustion engine is pressurised into high pressure
The driving means of high pressure fuel pump.
As the existing driving means possessing rocking arm, it is known to following device, in the apparatus, in order to right
Stop the situation that rocking arm falls off when the top cover of the bearing portion being provided with camshaft assembles effectively, and will be close to rocking arm
The rocking arm support that the surface in swing pivot portion and come off rocking arm limits is integrally formed on top cover (such as, ginseng
According to patent documentation 1).
It is also known that there is following device, though in order to drive at unit injector the seizure of plunger time also can
Enough prevent the phenomenon that cam follower comes off from plunger, and make the swing pivot portion of cam follower be bearing in through swing
In support shaft in central axial direction, and by extension spring to its to sling direction force device (for example, referring to patent
Document 2).
Citation
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2007-192101 publication
Patent documentation 2: Japanese Patent Publication 05-21163 publication
Summary of the invention
Invent problem to be solved
But, separate micro gap and close rocking arm support existing as being provided with at the swing pivot portion of rocking arm
Driving means, limit although rocking arm can be come off by it, but at push rod powered by rocking arm or valve rod
In the case of blocking, owing to rocking arm cannot normally be supported by, thus may be owing to carrying out the shock of self-driven cam
Deng and circumferential component is caused damage.
Particularly plunger is made to move back and forth at vertical upper side by rocking arm such driving means being used for
Petrolift driving in the case of, it is believed that when the slip exception that plunger blocks etc., it is impossible to normally propped up
The rocking arm held damages because carrying out the shock of self-driven cam or circumferential component causes the probability of damage uprise.
Additionally, be bearing in through the support shaft on oscillation center axis direction in the swing pivot portion making cam follower
On, and in the existing driving means pars intermedia of cam follower sling by the extension spring above swing pivot, not only
Can not be easily assembled owing to support shaft must be made to pass cam follower, and can the force of extension spring owing to slinging, and make
Friction between swing pivot portion and the support shaft of cam follower with exceed cam follower supporting needed for degree and increase
Add, thus produce the problem that durability reduces.
Then, the present invention provides a kind of and no matter any exception occurs on driven member side, can be to rocking arm week
The damage of side member suppresses, and is capable of the assembleability of driven member or the driving means of the lifting of durability.
For the method solving problem
In order to solve above-mentioned problem, in petrolift involved in the present invention, it is provided that a kind of driving means, (1) it possess:
Drive cam；Rocking arm, it swings corresponding to the rotation of described driving cam；Rocking arm supporting device, itself and described driving
Cam co-operating and to described rocking arm can support in the way of swinging, and described driving means makes following being driven
Dynamic component moves back and forth on the swaying direction of described rocking arm, described driven member to the swing end of described rocking arm to
Near the direction of described driving cam force, described driving means is characterised by, described rocking arm supporting device has: hinge portion
Part, the base end part of described rocking arm is supported in the way of swinging freely by it；Supporting parts, it is fixed with described pivot；
Force application part, its in the described swing end side of described rocking arm by described supporting parts carry, and to described swing end to
The side force of described swaying direction.
In the invention, except relative to rocking arm swing end from driven member to drive cam apply force it
Outward, rocking arm swing end by being supported by the force application part of parts carry in this swing end side, and to the one of swaying direction
Side is exerted a force.Therefore, even if occurring certain abnormal on driven member side thus from the force of the lateral rocking arm of driven member
In the case of diminishing, also can by the pivotal parts of rocking arm supporting device and force application part, utilize force application part to make rocking arm
Swing the driving cam that exerted a force of end or driven member and make rocking arm by three-point support.Its result is, no matter is being driven
Any exception is there is, all it can be avoided that drive cam to the shock of rocking arm etc. thus suppression because of the beating of rocking arm on dynamic component side
And the damage of the circumferential component caused.Further, during owing to having played the assembling of driven member, the positioning function of rocking arm, therefore can
Enough realize the lifting of assembling property, and by reducing the friction at the swing pivot portion of rocking arm, additionally it is possible to improve durability.Separately
Outward, rocking arm is normally being put on the situation on rocking arm to the force from driven member side driving cam side force
Under, rocking arm passes through pivotal parts and the driven member of rocking arm supporting device and drives cam, and by three-point support, and
Swing corresponding to driving the rotation of cam.
In inventive drive means, being preferably, the described side of (2) described swaying direction is to make described rocking arm
Described swing end is away from the direction of described driving cam.In this case, when occurring certain extremely to make from being driven
When the force of parts is impaired, can due to make driving cam and rocking arm away from, therefore can avoid the damage that shock between the two causes
Bad.
In inventive drive means, being preferably, (3) described driver part is with the first force described pendulum to described rocking arm
Moved end portion exerts a force to described driving cam side, and described force application part is to exert a force to described rocking arm less than the second of described first force
Described swing end force.
Accordingly, when the force from driven member is normal, it is possible to make rocking arm effectively corresponding to from driven part
The force of part side and drive the rotation of cam and swing, on the other hand, when the force from driven member subtracts singularly
Time few, owing to rocking arm to driven member side or can be driven cam side to exert a force by force application part, therefore, it is possible to prevent propping up of rocking arm
The state of holding becomes unstable situation.
In inventive drive means, being preferably, the described side of (4) described swaying direction is, makes the institute of described rocking arm
State swing end near the direction of described driving cam.In this case, though bigger in the force from driven member
In the case of amplitude ground reduces or disappears, it is also possible to make driving cam and rocking arm contact with the contact pressure of appropriateness, thus
It can be avoided that the damage caused because of shock between the two.
In inventive drive means, being preferably, following situation is suppressed by (5) described force application part, i.e. described
The described swing end of rocking arm is enterprising in the direction orthogonal with the direction of the described swing of the rotation corresponding to described driving cam
The situation of line displacement.Accordingly, before the assembling of driven member, it is possible to rocking arm is orientated certain posture as, i.e. be positioned at pendulum
On ad-hoc location on dynamic direction and the convolution direction orthogonal with swaying direction such that it is able to make to be sticked in the swing end of rocking arm
The assembling facilitation of driven member.
In inventive drive means, being preferably, (6) described force application part has propping up by described supporting parts carry
Socket end portion and the co-end engaged with the described swing end of described rocking arm from the opposite side of described swaying direction, and also
There is the middle spring body between described supporting end and described co-end.Hereby it is possible in driven member
The range content that arranges of the rocking arm on vibration-direction is changed places and is configured force application part, and is driving cam and rocking arm
Engaging before, it is also possible to make rocking arm be supported by parts carry with certain posture.
In there is the driving means of structure of described (6), it is preferably, the described supporting end of (7) described force application part,
The most described middle spring body in described co-end and described middle spring body is made up of leaf spring.In this situation
Under, even if also being able to easily it be configured in the case of the length of the leaf spring of the middle spring body of composition is relatively big, from
And can realize, with relatively low spring constant, the force application part that durability is high.
In there is the driving means of structure of described (6), or it is preferably, the described supporting of (8) described force application part
End and described co-end are by can carry out relative displacement on the described reciprocating direction of described driven member
Mode and the split parts that are mutually clamped are constituted, described middle spring body is arranged at described supporting end and institute by by compression
State the elastomeric element between co-end to constitute.In this case, though drive cam with before the engaging of rocking arm, it is also possible to
Clearly the hunting range of rocking arm is specified.
In inventive drive means, being preferably, (9) described driven member is made up of the input block of pump installation,
Described pump installation is sucked or ejecting fluid in the pump housing by the reciprocating motion of described input block, and described pump installation has bullet
Property parts, described elastomeric element to described input block near described driving cam side exert a force.In this case, it is possible to make
The input block of pump installation moves back and forth according to the swing of the rocking arm of the rotation corresponding to driving cam, thus is formed suitable
Driving means together in high-pressure pump.Further, the input block at pump installation cannot the most back and forth be transported because certain is abnormal
Dynamic, so that from the situation that rocking arm is reduced greatly to the force of the input block driving cam side force or disappears
Under, due to by rocking arm supporting device and drive cam and make rocking arm by three-point support, therefore, it is possible to avoid drive cam to shaking
The shock etc. of arm such that it is able to the damage of the circumferential component that suppression causes because of the beating of rocking arm.Additionally, due at pump installation
The positioning function of rocking arm has been played in driving means side, therefore, it is possible to realize the lifting of the assembling property of pump installation during assembling.
It addition, rocking arm swung end in the case of exerting a force away from the direction driving cam in above-mentioned second force,
This second force is set to, it is possible to resists and is made rocking arm away from driving by what the deadweight of rocking arm brought to the force driving cam side
More than the minima of the force of moving cam.Additionally, rocking arm is swung end near driving cam in above-mentioned second force
In the case of the force of direction, it is possible to will be set as only reducing quite to first force swinging end of rocking arm from driven member
Amount in the second force.
Invention effect
According to the present invention, although occurring in driven member side certain abnormal and making executing from the lateral rocking arm of driven member
In the case of power reduces, but due to the force application part by the swing end side of rocking arm to rocking arm to driven member or driving
Cam exerts a force, and also therefore is able to by this either party and makes rocking arm quilt with pivotal parts and the force application part of rocking arm supporting device
Three-point support.Therefore, it is possible to provide a kind of driving means, this device is it can be avoided that because of the shock to rocking arm driving cam to cause
Deng, thus the damage of circumferential component that suppression causes because of the beating of rocking arm, and be capable of driven member assembling or
The lifting of durability.
Accompanying drawing explanation
Fig. 1 is the explanatory diagram of the Sketch of the driving means of the petrolift involved by the first embodiment of the present invention.
Fig. 2 is the sectional view of the driving means of the petrolift involved by the first embodiment of the present invention.
Fig. 3 (a) is bowing near the rocking arm in the driving means of the petrolift involved by the first embodiment of the present invention
View, Fig. 3 (b) is the figure observed from IIIB direction in Fig. 3 (a).
Fig. 4 is the elastomeric element in the driving means of the petrolift involved by the first embodiment representing the present invention and executes
The curve chart of the valve characteristic of power parts, the longitudinal axis is for representing spring load, and transverse axis is the rushing of plunger being denoted as driven member
Journey position.
Fig. 5 is the sectional view of the driving means of the petrolift involved by second embodiment of the present invention.
Fig. 6 is the sectional view of the driving means of the petrolift involved by third embodiment of the present invention.
Fig. 7 (a) is bowing near the rocking arm in the driving means of the petrolift involved by third embodiment of the present invention
View, Fig. 7 (b) is the figure observed from arrow VIIB direction in Fig. 7 (a).
Fig. 8 is the sectional view of the driving means of the petrolift involved by the 4th embodiment of the present invention.
Detailed description of the invention
Hereinafter, referring to the drawings embodiment preferred for this invention is illustrated.
(the first embodiment)
Fig. 1 to Fig. 4 is the figure of the driving means involved by the first embodiment representing the present invention, it is illustrated that by the present invention
Example in the driving means of the high pressure fuel pump being applied to plunger pump type.
It addition, the petrolift of present embodiment is installed in internal combustion engine, the many gas of such as four circulations being equipped in vehicle
On the petrol engine (hereinafter simply referred to as " electromotor ") of cylinder, using the part as its fuel feed system.This petrolift pair
Fuel feed pump supply will pressure accumulation stockpiles in this fuel feed pump fuel under high pressure, described fuel feed pump is relative to the spray of multiple direct injections
The fuel of emitter (Fuelinjection nozzle) distribution high pressure.
As shown in the Sketch in Fig. 1, the petrolift 10 of present embodiment by pipe arrangement L be arranged at fuel tank
Supply pump FP in T is connected, to be pressurised into the fuel of relatively low supply pressure to petrolift 10 importing from supply pump FP.Supply
The most DYN dynamic low-pressure fuel pump of pump FP, and the gasoline as fuel in fuel tank T is drawn.
In the present embodiment shown in Fig. 1 to Fig. 3, by driving means 20, petrolift 10 is driven.
Petrolift 10 has: the pump housing 11, pacified in the way of can carrying out shift reciprocately in the axial direction relative to the pump housing
The plunger 12 filled and the pressurization being divided formation between one end 12a (upper end in Fig. 2) and the pump housing 11 of this plunger 12
Room 13.Suction passage 11a (the combustion that the fuel of pump FP imports in compression chamber 13 is automatically supplied in the future additionally, be formed on the pump housing 11
Material introduction channel) and ejection passage that the fuel pressurized in the inside of compression chamber 13 is gone out to described fuel feed pump side spray
11b。
Driving means 20 possesses: drives cam 21, carry out, corresponding to driving the rotation of cam 21, rocking arm 22 and swung
With drive cam 21 co-operating and to rocking arm 22 by the rocking arm supporting device 23 that can support in the way of swinging.Additionally,
Rocking arm supporting device 23 has the pump mounting shell 24 in a part for the outside wall portions being integrally installed on electromotor.
In the 12b side, the other end of the plunger 12 of petrolift 10, constitute rocking arm 22 near the side driving cam 21
To the input block (driven member) of force, driving means 20 makes plunger 12 in the swing side of the rocking arm 22 axial corresponding to it
Upwards move back and forth.
Specifically, as in figure 2 it is shown, the pump housing 11 of petrolift 10 has: multiple flange part 11f, it is respectively provided with bolt
Hole 11c；Embedding not 11g, it is embedded in the pump installing hole portion 24a of pump mounting shell 24 (supporting parts), and the pump housing 11 passes through quilt
Not shown multiple bolts of being inserted in multiple bolt hole 11c and engage with pump mounting shell 24.Additionally, the pump housing 11 has fuel
Ingress pipe portion 11i and fuel bleed pipe portion 11j, the inside of this fuel inlet pipe portion 11i is provided with fuel filter 17.
One end thereof 12a side is slidably inserted into the inside of the pump housing 11 by plunger 12, by making the pump housing 11
The volume of compression chamber 13 of inside corresponding to the shift reciprocately of plunger 12 change (increase, reduce) such that it is able to reality
Existing fuel is to the suction of compression chamber and the fuel ejection from compression chamber 13.
Additionally, plunger 12 from its 12b side, another end via rocking arm 22 and by drive cam 21 and driven.
Cam 21 is driven to be arranged in the cylinder head (diagram the most in detail) constituting pump mounting shell 24, and by from starting
The rotary power of machine and driven.This driving cam 21 (is schemed the most in detail by the exhaust cam shaft being integrally installed on such as electromotor
Show) on.
Additionally, be provided with spring-loaded portion 12c, compression helical spring 19 (bullet near another end 12b of plunger 12
Property parts) it is loaded between this spring receiving portion 12c and the pump housing 11 with compressive state.It addition, plunger 12 is by compression spiral
Spring 19 and Chang Shixiang make direction that the volume of compression chamber 13 increases (in Fig. 2 direction) down force.Therefore, cam is being driven
21 when being driven in rotation by the power from electromotor, past according to the rocking arm 22 of the rotation corresponding to this driving cam 21
Physical pendulum moves, and makes plunger 12 move back and forth in the axial direction.
Rocking arm 22 by the swing end 22a of another end 12b being sticked in plunger 12, be supported in pump mounting shell 24 side
On base end part 22b and to being sticked in the centre driving the cylinder 22r on cam 21 to keep in the way of rotatable
Portion 22c is constituted.This rocking arm 22 is together with another end 12b of plunger 12, by the engine motor oil in cylinder head (from outward
The machine oil in portion) and lubricated.
Before and after compression chamber 13, i.e. be provided with inlet valve 14 and ejection valve 16 on the suction side and ejection side of compression chamber 13,
Described inlet valve is allowed to pressurization by downstream compared with fuel filter 17 (and not shown suction passage room)
The fuel of room 13 sucks and plays adverse current and prevents the check valve of function to constitute, and ejection valve 16 is by the combustion allowed from compression chamber 13
Spraying and playing adverse current of material prevents the check valve of function to constitute.
Inlet valve 14 is by suction passage 11a carrying out the valve body 14a and ring-type valve seat 14b of tabular of opening and closing and making valve
Body 14a and valve seat 14b abutting (reduces the pressure of predetermined inlet valve valve opening pressure to reaching predetermined suction pressure compared with supply pressure
Power) closed valve state valve spring 14c constitute.
Ejection valve 16 is carried out the valve body 16a and ring-type valve seat 16b of tabular of opening and closing by ejection passage 11b and makes valve
Body 16a and valve seat 16b abuts to reaching predetermined ejection pressure and (exceeds predetermined ejection compared with the pressure of the fuel in fuel feed pump
The pressure of valve valve opening pressure) closed valve state valve spring 16c constitute.
Therefore, at plunger 12 in time making in the way of the volume reducing of compression chamber 13 to carry out displacement above in Fig. 1, inhaling
Enter and under the closed valve state of valve 14, the fuel in compression chamber 13 is pressurizeed and make its pressure increase such that it is able to make ejection valve 16
Valve opening also makes fuel spray from compression chamber 13.Additionally, plunger 12 by make compression chamber 13 volume increase in the way of in Fig. 1
When lower section carries out displacement, the fuel in compression chamber 13 is depressurized and its pressure declines such that it is able at the valve closing shape of ejection valve 16
Inlet valve 14 valve opening is made under state.
Additionally, be provided with electromagnetic operating mechanism 15 on inlet valve 14.
Electromagnetic operating mechanism 15 have functional unit 15a, operation spring 15b, electromagnetic coil portion 15c, functional unit 15a with
The mode opposed with valve body 14a is held slideably in valve body 11, operation spring 15b to this functional unit 15a with suction
The force of the valve spring 14c entering valve 14 is compared and the bigger valve opening side towards valve body 14a that exerts a force exerts a force, electromagnetic coil portion 15c
The force of valve opening operation spring 15b can be resisted and make functional unit 15a carry out displacement to the valve-closing side of valve body 14a.
This electromagnetic operating mechanism 15 by make electromagnetic coil portion 15c be energized and carry out excitation time (during conducting state),
Functional unit 15a can be attracted to electromagnetic coil portion 15c side, and inlet valve 14 can be made by the force of valve spring 14c
Valve body 14a to valve closing direction recover.Additionally, electromagnetic operating mechanism 15 is stopped in the energising of electromagnetic coil portion 15c and makes it
When being in non-excited state (off-state), it is possible to by valve opening operate spring 15b, thus resist valve spring 14c force and
Make inlet valve 14 valve opening forcibly.Accordingly, because electromagnetic operating mechanism 15 by the energising to electromagnetic coil portion 15c to making suction
Enter valve 14 to be controlled by the period of valve opening forcibly, therefore, it is possible to the fuel in compression chamber 13 implemented by plunger 12
Period of pressurization carry out variable control.
On the other hand, in addition to pump mounting shell 24, rocking arm supporting mechanism 23 also has: pivotal parts 25, and it shakes to be sticked in
Mode on the base end part 22b of arm 22 is supported by pump mounting shell 24；Holding clamp 26, it is to prevent the base end part of rocking arm 22
The mode that 22b departs from from top ends 25a of pivotal parts 25 is installed in pivotal parts 25, and (can also is bullet by leaf spring
Spring wire rod) constitute；Force application part 27, it exerts a force to the side of this swaying direction with the swing end 22a to rocking arm 22
Mode is supported by pump mounting shell 24.
Here, pivotal parts 25 is made up of the generally cylindrical spindle unit being vertically fixed on pump mounting shell 24, and
With holding clamp 26 co-operating at top ends 25a that this is hemispherical, and the base to the swing pivot portion becoming rocking arm 22
End 22b is can keep in the enterprising line tilt campaign of arbitrary direction and in the way of carrying out postural change.Additionally, protect
Hold and be formed as with fixture 26, to the contact giving appropriateness between the base end part 22b and top ends 25a of pivotal parts 25 of rocking arm 22
Surface pressure, to be maintained at the swing pivot of rocking arm 22 (oscillation center) on certain position.It addition, the base end part of rocking arm 22
The concave spherical surface portion (without symbol) of top ends 25a corresponding to pivotal parts 25 it is formed with on 22b.
Force application part 27 is configured in relative to rocking arm 22 on the 22a side, swing end on its degree direction, i.e. be configured
In the base end part 22b away from rocking arm 22 on the side of shake end 22a, and from this front side, it is sticked in rocking arm 22
Swing end 22a.Additionally, the swing end 22a that force application part 27 is to rocking arm 22, such as to away from the direction driving cam 21
(upper side in Fig. 1) exerts a force.
This force application part 27 have rocking arm 22 swing 22a side, end supported by pump mounting shell 24 supporting end 27a,
The card of the swing end 22a of rocking arm 22 it is sticked in the opposite side (side upward of the lower side from Fig. 1) from swaying direction
Close end 27b, and there is the middle spring body 27c between supporting end 27a and co-end 27b.Further, this is executed
The most middle spring body 27c in the supporting end 27a of power parts 27, co-end 27b and middle spring body 27c is by plate
Spring is constituted.
More specifically, in the present embodiment, force application part 27 entirety becomes and consists of spring metal material
Leaf spring, as in figure 2 it is shown, middle spring body 27c is relative to the supporting end 27a extended in the horizontal direction to the lower side
Extend, and make co-end 27b from the bottom of this middle spring body 27c towards the swing end 22a of rocking arm 22 to tiltedly
Upper side extends.
Additionally, force application part 27 bends between supporting end 27a, co-end 27b and middle spring body 27c, and
Length is bigger for the size of the width of this banding.It addition, the chi of the width of the banding of force application part 27
Very little can being directed to supports parts 27a, co-end 27b and middle spring body 27c and changes respectively, it is also possible to phase
With.
To the swing end 22a of rocking arm 22 to the executing upward of the force application part 27 away from the direction force driving cam 21
Power (second force), with by the swings end 22a of rocking arm 22 in the way of driving cam 21 side to exert a force to plunger 12 to
Force (hereinafter referred to as " the first force ") phase down of the compression helical spring 19 (elastomeric element) of the lower side force in Fig. 1
Than and less.
Additionally, the co-end 27b embossed card of force application part 27 is together in the swing end 22a of rocking arm 22, force application part 27
Following situation can be suppressed, i.e. the swing end 22a of rocking arm 22 is in the swing with the rotation corresponding to driving cam 21
Different direction, direction (above-below direction in Fig. 1, Fig. 2), particularly in the direction orthogonal with this swaying direction (Fig. 2's and paper
The direction that face is orthogonal) situation of enterprising line displacement.
Specifically, as shown in Fig. 3 (a) and Fig. 3 (b), the one side side of the swing end 22a of rocking arm 22 is formed for post
Another end 12b of plug 12 is can carry out the recess 22e engaged in the way of sliding, at the swing end 22a of rocking arm 22
The co-end 27b of force application part 27 it is formed for so that the recess 22f engaged can be carried out in the way of sliding on another side side.
As shown in Figure 4, from plunger 12 to the swing end 22a of rocking arm 22 applying from compression helical spring 19 down
Force (hereinafter referred to as first force) f1, bosom in plunger 12 enters into the pump housing 11 thus compression chamber 13 is set to
Reach maximum on the position of the top dead centre TDC of little volume, and retreat thus by pressurization from the position of this top dead centre TDC at plunger 12
Minimize on the position of lower dead center BDC that room 13 is set to maximum volume.
On the other hand, the second force f2 the swing end 22a of rocking arm 22 is put on from force application part 27, although at post
Be minimum on the position of the top dead centre TDC of plug 12, the position of lower dead center BDC of plunger 12 be maximum, but become and under
The minima of the first force f1 on the position of stop BDC is compared and less value.This second force f2 is set to, it is possible to support
The anti-deadweight because of rocking arm 22 and produce to drive cam 21 side force, and to make rocking arm 22 away from drive cam 21 vertical
More than minima f3 of the force above direction.Although additionally, the spring performance of force application part 27 can be by the second force f2
This non-linear characteristic represented by change, it is also possible to be linear spring performance, but the spring constant of force application part 27
Spring constant less than compression helical spring 19.
It addition, more specifically, the pump housing 11 is fitted together in liquid-tight manner by axially adjacent and each other by 0 ring etc. sealing ring
Multiple tubulars or ring-type part (without symbol) constitute.
Additionally, in lower end side in the figure of the pump housing 11 exposed in pump mounting shell 24, be provided with being sticked in plunger 12
Multiple sealing rings 41,42 carry out the oil sealing maintaining part 18 kept.Here, sealing ring 41 is the sliding joint to plunger 12 with the pump housing 11
Gap part seals, thus suppresses the fuel sealing ring that fuel leaks, and sealing ring 42 is, to the engine in cylinder head
Oil carries out the oil sealing suppressed to the immersion of plunger 12 with the slip slotted section of the pump housing 11.
Next effect is illustrated.
In the driving means 20 of the petrolift 10 of the present embodiment constituted in the way of the most above-mentioned, at electromotor
In operating, cam 21 is driven to rotate in the direction of rotation represented by white arrow labelling in fig. 2.Further, to shaking
Arm 22 to drive cam 21 side force the Fig. 1 from plunger 12 side in down first force normally put on rocking arm 22
Swing end 22a upper in the case of, rocking arm 22 by pivotal parts 25, plunger 12 and driving cam 21 by three-point support,
And corresponding to driving the rotation of cam 21 to carry out reciprocally swinging on above-below direction in the drawings.
In this condition, except applying towards driving cam 21 side from plunger 12 relative to the swing end 22a of rocking arm 22
First force outside, the swings end 22a of rocking arm 22 is applied with from force application part 27 upward second exert a force.
In this, it is assumed that the normal sliding mode between plunger 12 and the pump housing 11 is abnormal and impaired due to certain.Such as, post
Plug 12 burn-backs on the pump housing 11 side, or owing to making the sliding of plunger 12 owing to entering foreign body between plunger 12 and the pump housing 11
Impaired.In this case, plunger 12 is by driving cam 21 to be forcibly moved to top dead centre, and cannot pass through from pressure
The force of contracting helical spring 19 and successfully decline, so that aobvious to the first force of the force driving cam 21 side to rocking arm 22
Write ground to reduce.
But, even if this in the case of plunger 12 reduces greatly to the first force of rocking arm 22, rocking arm
22 can also be by the pivotal parts 25 of rocking arm supporting device 23 and force application part 27 with utilize force application part 27 and make rocking arm 22
The plunger 12 that exerted a force of swing end 22a, and by three-point support.
Its result is, even if in the case of occurring certain abnormal on plunger 12 side, it is also possible to avoid rocking arm 22 effectively
By carrying out the situation of the shock of self-driven cam 21, beating etc. such that it is able to this periphery that the beating because of rocking arm 22 is caused
The damage of parts suppresses.
Being additionally, since in the stage before petrolift 10 is installed in driving means 20, rocking arm 22 is supported by rocking arm
Pivotal parts 25 and the force application part 27 of mechanism 23 and be supported by with certain posture, therefore, it is possible to make driving means 20 play rocking arm
The function of the location of 22 such that it is able to promote the assembling property of other the petrolift 10 engaged to the rocking arm 22 of plunger 12.
Additionally, in the present embodiment, it is configured in the force application part 27 swinging 22a side, end of rocking arm 22, due to right
The swing end 22a of rocking arm 22 exerts a force on the direction of cam 21 to away from driving, though therefore make owing to certain is abnormal from
The force of plunger 12 is impaired, but owing to making driving cam 21 away from rocking arm 22, also therefore is able to avoid because of shock between the two
The damage caused.Even if additionally, under normal state, frictional force at the base end part 22b of rocking arm 22 is also due to from executing
The force of power parts 27 raises without the degree that exceedes required for fulcrum keeps, thus improves the durable of driving means 20
Property.
It addition, in present embodiment, the swing end 22a of rocking arm 22 is exerted a force to driving cam 21 side by plunger 12 with first
Force, the force application part 27 swing end 22a to rocking arm 22, to exert a force less than the second of the first force.Therefore, exist
First force is for time normal, it is possible to make rocking arm 22 correspond to the force from plunger 12 side and the rotation of driving cam 21 effectively
And swing, on the other hand, make when the first force reduces singularly, can be by making from the second of force application part 27 the force
Rocking arm 22 is exerted a force to plunger 12 side, is in an unsure state from the bearing state preventing rocking arm 22.
Additionally, in the present embodiment, owing to following situation can be suppressed by force application part 27, i.e. rocking arm 22
Shake the end 22a situation at the direction enterprising line displacement orthogonal with the swaying direction of the rotation corresponding to driving cam 21, because of
This, before the assembling of plunger 12, it is possible to makes rocking arm 22 orientate certain posture as, such as, is positioned in the figure of rocking arm 22 upper and lower
On ad-hoc location on swaying direction and orthogonal to that convolution direction such that it is able to make to be sticked in the swing end of rocking arm 22
The assembling facilitation of the plunger 12 of 22a.
Additionally, force application part 27 can the range content that arrange of rocking arm 22 on the vibration-direction of plunger 12 be changed places
Configuration, even and if driving cam 21 and also be able to before the engaging of rocking arm 22 make rocking arm 22 with certain posture by pump mounting shell 24
Supporting.And, even if the length constituting the leaf spring of force application part 27 is relatively big, but owing to can configure simply, the most also
Enough amount of deflection brachiums and optimum width can be set thus realize, with low spring constant, the force application part that durability is higher
27。
It addition, as by driving means 20, the plunger 12 of powered driven member becomes the input of petrolift 10
Parts, by exerting a force near the side driving cam 21 among the compression helical spring 19 swaying direction to rocking arm 22.Accordingly, it is capable to
The plunger 12 enough making petrolift 10 moves back and forth along with the swing of the rocking arm 22 of the rotation corresponding to driving cam 21, and
And become the driving means 20 being suitable for high-pressure pump.
So, in the present embodiment, even if having certain abnormal generation on plunger 12 side thus laterally shaking from plunger 12
In the case of the force of arm 22 reduces, but by rocking arm 22 being exerted a force to plunger 12 side by force application part 27, thus it also is able to lead to
Cross the pivotal parts 25 of plunger 12 and rocking arm supporting device 23 and force application part 27 and make rocking arm 22 by three-point support.Accordingly, it is capable to
Enough offer is avoided driving the cam 21 shock etc. to rocking arm 22 such that it is able to the periphery that suppression causes because of the beating of rocking arm 22
The damage of part, and the driving means 20 of the lifting of assembling property when being capable of the assembling of plunger 12 and durability.
(the second embodiment)
Fig. 5 is the figure representing the driving means involved by second embodiment of the invention.
It addition, the driving means of the petrolift of each embodiment of following description, be to the first above-mentioned embodiment party
The driving means that petrolift is driven that petrolift 10 in formula is identical, although support machine at rocking arm with the first embodiment
The knot of the force application part of structure constitutes upper different, but other structure and the first embodiment are roughly the same composition, because of
This, be the most only described in detail to the difference from the first embodiment.
As it is shown in figure 5, the driving means 50 of present embodiment possesses: drive cam 21, relative to the rotation driving cam 21
Then carry out the rocking arm 22 that swings and with drive cam 21 co-operating and to rocking arm 22 can support in the way of swinging
Rocking arm supporting device 53.Additionally, rocking arm supporting device 53 has in a part for the outside wall portions being integrally installed on electromotor
Pump mounting shell 24.
Specifically, rocking arm supporting device 53 has: pump mounting shell 24, pivotal parts 25, holding clamp 26 and force
Parts 57, described force application part 57 is using the swing end 22a court in the Fig. 5 as the side of this swaying direction to rocking arm 22
On direction force mode supported by pump mounting shell 24.
Force application part 57, by by supporting end 57a and co-end 57b with can be on the vibration-direction of plunger 12
Carry out the mode chimeric (engaging) of relative displacement split parts composition together, wherein, described supporting end 57a vertically by
Being supported on pump mounting shell 24, described co-end 57b is sticked in the swing end 22a of rocking arm 22.Further, by compression spiral bullet
The middle spring body 57c that spring is constituted is arranged between described supporting end 57a and co-end 57b by compression.
The supporting end 57a of force application part 57 is the parts of the column extended in vertical direction, has on its lower end
There is wide diameter portion 57f.The base end side of the co-end 57b of force application part 57 is with can be in vertical direction relative to supporting end 57a
The mode of upper lifting is supported by, and its top ends side is sticked in the swing end 22a of rocking arm 22.Additionally, middle spring body
57c is supported by end 57a in the way of cincture supporting end 57a and guides, and with to co-end 57b upside force in figure
The mode of (pushing), is joined with compressive state between the base end side and the wide diameter portion 57f of supporting end 57a of co-end 57b
Put.
The 22a side, swing end that this force application part 57 is configured on its length direction relative to rocking arm 22, i.e. away from shaking
The base end part 22b of arm 22 and near the side swinging end 22a.It addition, force application part 57 to the swing end 22a of rocking arm 22 to
Such as make it away from driving direction (upper side in Fig. 5) force of cam 21.
The force application part 57 exerted a force the swing end 22 of rocking arm 22 to the direction making it away from driving cam 21 is upward
Second force f2 be less than, from compression helical spring 19 down first force f1, described compression helical spring 19 is with right
Plunger 12 is exerted a force by what the shake end 22a of rocking arm 22 exerted a force to driving cam 21 side mode to the lower side.
Additionally, the co-end 57b embossed card of force application part 57 is together in the swing end 22a of rocking arm 22, force application part 57
Following situation can be suppressed, i.e. the swing end 22a of rocking arm 22 is in the swing with the rotation corresponding to driving cam 21
Different direction, direction (above-below direction in Fig. 5), particularly in the direction orthogonal with this swaying direction (with the paper of Fig. 5 just
The direction handed over) situation of enterprising line displacement.
Although the spring performance of the middle spring body 57c of force application part 57 both can be by the change institute of the second force f2
The non-linear characteristic represented, it is also possible to be linear spring performance, but the spring constant of force application part 57 is less than compression spiral
The spring constant of spring 19.
In the present embodiment, although having certain abnormal generation on plunger 12 side thus from the lateral rocking arm 22 of plunger 12
In the case of force reduces, but owing to rocking arm 22 being exerted a force to plunger 12 side by force application part 57, therefore it also is able to pass through post
Plug 12 and the pivotal parts 25 of rocking arm supporting device 53 and force application part 57 and make rocking arm 22 by three-point support.Therefore, it is possible to carry
For avoiding driving cam 21 to the shock of rocking arm 22 etc. it is thus possible to the suppression circumferential component that causes because of the beating of rocking arm 22
Damage, and the driving means 50 of the lifting of assembling property when being capable of the assembling of plunger 12 or durability.
(the 3rd embodiment)
Fig. 6 and Fig. 7 is the figure representing the driving means involved by third embodiment of the present invention.
As shown in Figure 6, in the driving means 60 of present embodiment, rocking arm supporting device 63 has: pump mounting shell 24, pivot
Spindle unit 25, holding clamp 26 and force application part 67, described force application part 67 with to the swing end 22a of rocking arm 22 to work
The mode exerted a force for the direction down in the side of this swaying direction, i.e. Fig. 6 is supported on pump mounting shell 24.
On the 22a side, swing end that force application part 67 is configured on its length direction relative to rocking arm 22, thus right
The swing end 22a of rocking arm 22 is to making it away from driving the direction force of cam 21.
Additionally, force application part 67 has: supporting end 67a, it is in the swing end of the base end part 22b away from rocking arm 22
Supported by pump mounting shell 24 on 22a side；Co-end 67b, it is attached to a pair hook portion 67h, and described hook portion 67h is from swing side
To opposite side (side downward of the upper side from Fig. 6) engage with the swing end 22a of rocking arm 22, and force application part 67
There is the middle spring body 67c between supporting end 67a and co-end 67b.Further, the supporting of this force application part 67
The most middle spring body 67c in end 67a, co-end 67b and middle spring body 67c is made up of leaf spring.
More specifically, in the present embodiment, force application part 67 become its entirely through spring metal material structure
The leaf spring become, as shown in Figure 6, middle spring body 67c is relative to the supporting end 67a extended in the horizontal direction to the lower side
Extending, co-end 67b is from the bottom of this middle spring body 67c towards the swing end 22a of rocking arm 22 obliquely upward
Extend on side.
It addition, a pair hook portion 67h being integrally provided on the width both sides of co-end 67b, from from swing side
To opposite side carry out being sticked on the swing end 22a of rocking arm 22, thus to rocking arm 22 to making it close drive cam 21
Direction exerts a force.
To the swing end 22a of rocking arm 22 to down the of the force application part 67 close to the direction force driving cam 21
Two force f2 are less than, and from the down first force f1 of compression helical spring 19, described compression helical spring 19 is with to rocking arm
The shake end 22a of 22 is to driving the mode of cam 21 side force from exerting a force plunger 12 to the lower side.
Additionally, a pair hook portion 67h of co-end 67b of force application part 67 is sticked in the two of the swing end 22a of rocking arm 22
On side, thus following situation can be suppressed by force application part 67, i.e. the swing end 22a of rocking arm 22 with correspond to
Drive the different direction of the swaying direction (above-below direction in Fig. 6) of rotation of cam 21, particularly with this swaying direction just
The situation of direction (direction orthogonal with the paper of Fig. 6) the enterprising line displacement handed over.
Although the spring performance of the middle spring body 67c of force application part 67 both can be with right and wrong linear property, it is also possible to be
Linear property, but the spring constant of force application part 67 is less than the spring constant of compression helical spring 19.
In the present embodiment, although having certain abnormal generation on plunger 12 side thus from the lateral rocking arm 22 of plunger 12
In the case of force reduces, but owing to rocking arm 22 being exerted a force to driving cam 21 side by force application part 67, therefore it also is able to lead to
Overdrive cam 21 and pivotal parts 25 and the force application part 67 of rocking arm supporting device 63 and make rocking arm 22 by three-point support.Cause
This, using the teaching of the invention it is possible to provide avoid driving cam 21 to avoid the shock etc. of rocking arm 22 it is thus possible to the periphery that causes because of the beating of rocking arm 22
The damage of parts, and the driving means 60 of the lifting of assembling property when being capable of the assembling of plunger 12 or durability.
It addition, in present embodiment, owing to second exerts a force the f2 swing end 22a to rocking arm 22 to making its close driving convex
The direction force of wheel 21, therefore, it is possible to will be set as reducing to the first force f1 of the swing end 22a of rocking arm 22 from plunger 12
The amount corresponding for force f2 with second, so more favourable to the aspect of assembly operation or durability.
(the 4th embodiment)
Fig. 8 is the figure of the driving means involved by the 4th embodiment representing the present invention.
As shown in Figure 8, the driving means 70 of present embodiment possesses: drive cam 21, relative to the rotation driving cam 21
Then carry out the rocking arm 22 that swings and with drive cam 21 co-operating and to rocking arm 22 can support in the way of swinging
Rocking arm supporting device 73.Additionally, rocking arm supporting device 73 has in a part for the outside wall portions being integrally installed on electromotor
Pump mounting shell 24.
Specifically, rocking arm supporting device 73 has: pump mounting shell 24, pivotal parts 25, holding clamp 26 and force
Parts 77, described force application part 77 is using the swing end 22a court in the Fig. 8 as the side of its swaying direction to rocking arm 22
The mode of upper direction force is supported on pump mounting shell 24.
Force application part parts 77 by by supporting end 77a and co-end 77b with can be in the reciprocating motion side of plunger 12
Upwards carry out the mode chimeric (engaging) of relative displacement split parts composition together, wherein, supporting end 77a vertically by
Being supported on pump mounting shell 24, described co-end 77b is sticked in the swing end 22a of rocking arm 22.Further, by compression spiral bullet
The middle spring body 77c of spring composition is arranged between described supporting end 77a and co-end 77b by compression.
The supporting end 77a of force application part 77 is the parts of the column extended in vertical direction, has on this bottom
There is wide diameter portion 77f.The base end side of the co-end 77b of force application part 77 relative to supporting end 77a with can be in vertical direction
The mode of upper lifting is supported by, and its top ends side is sticked in the swing end 22a of rocking arm 22.Additionally, middle spring body
77c is supported by end 77a in the way of cincture supporting end 77a and guides, and with to co-end 77b downside force in figure
The mode of (pushing) is joined with compressive state between the base end side and the wide diameter portion 77f of supporting end 77a of co-end 77b
Put.
The 22a side, swing end that this force application part 77 is configured on its length direction relative to rocking arm 22, i.e. away from shaking
The base end part 22b of arm 22 and near the side swinging end 22a.It addition, force application part 77 to the swing end 22a of rocking arm 22 to
Near the side of swaying direction, the direction (lower side in Fig. 8) of cam 21 is such as driven to exert a force.
The down second force f2 to the force application part 57 that the swing end 22a of rocking arm 22 exerts a force to driving cam 21 side
Less than the down first force f1 from compression helical spring 19, described compression helical spring 19 is with the shake end to rocking arm 22
Portion 22a exerts a force to plunger 12 to the lower side to the mode driving cam 21 side force.
Additionally, between another end 12b of plunger 12 is sandwiched in by the co-end 77b of force application part 77, and at rocking arm
The planar part of these width both sides it is sticked on the swing end 22a of 22.
Although the spring performance of the middle spring body 77c of force application part 77 is both can be with right and wrong linear property, it is also possible to
It is linear property, but the spring constant of force application part 77 is less than the spring constant of compression helical spring 19.
In the present embodiment, although having certain abnormal generation on plunger 12 side thus from the lateral rocking arm 22 of plunger 12
In the case of force reduces, but owing to rocking arm 22 being exerted a force to driving cam 21 side by force application part 27, therefore it also is able to lead to
Overdrive cam 21 and pivotal parts 25 and the force application part 77 of rocking arm supporting device 73 and make rocking arm 22 by three-point support.Cause
This, using the teaching of the invention it is possible to provide make driving cam 21 and rocking arm 22 with appropriateness contact press contacts, and avoid drive cam 21 to rocking arm 22
Shock etc., from the damage of circumferential component that causes because of the beating of rocking arm 22 can be suppressed, further, it is possible to realize plunger 12
Assembling time assembling property or the driving means 70 of lifting of durability.It addition, by force application part 77, due to can be clear and definite
The hunting range of regulation rocking arm 22, and can be set as reducing the amount corresponding for force f2 with second by the first force f1, enter
And it is more favourable to the aspect of assembly operation or therefore durability.
Although it addition, have employed in above-mentioned each embodiment, by pivotal parts 25, rocking arm 22, force application part 27,
57,67 or 77 carry out the structure configured on the length direction of rocking arm 22 in a linear fashion, but force application part 27,57,67 or
77 can also use the configuration of deviation from the axis of the length direction of rocking arm 22.Although additionally, in above-mentioned each enforcement
In mode, the either of which in driving means 20,50,60,70 is the dress that the petrolift 10 to elevated pressurization is driven
Put, but inventive drive means be readily adaptable for use in be suitable to the plunger piston type beyond petrolift pump drive, have and shaking
On the swaying direction of arm in other device of reciprocating input block.It addition, although rocking arm all have employed cylinder rocking arm,
But as long as being that the contact drop at the concave spherical surface portion 22d of the base end part 22b that can make rocking arm 22 is low to the situation with pair band cylinder
The composition of identical journey, then can also get involved the inserting being provided with other between rocking arm and driving cam, it would however also be possible to employ
Drive, on cam side, the such structure of rotation key element corresponding to multiple protuberances is installed.
As described above, in driving means involved in the present invention, although there is certain on driven member side
Abnormal thus in the case of the force of the lateral rocking arm of driven member diminishes, but due to executing by the swing end side of rocking arm
Power parts and rocking arm to driven member or is driven cam force, also therefore be able to by it either party and support machine with rocking arm
Pivotal parts and the force application part of structure and make rocking arm by three-point support.Avoid driving cam to rocking arm therefore, it is possible to provide
Clash into such that it is able to the damage of the circumferential component that suppression causes because of the beating of rocking arm, further, it is possible to realize driver part
Assembling property during assembling or the driving means of the lifting of durability.This present invention for making driven member by rocking arm
Reciprocating driving means is overall, is especially suitable for the height that the fuel of internal combustion engine is pressurised into the high pressure that can directly spray
All driving means that pressurized fuel pump is driven are useful.
Symbol description
10 ... petrolift；
11 ... the pump housing；
11a ... suction passage；
11b ... ejection passage；
12 ... plunger (input block, driven member)；
12a a ... end；
12b ... another end；
13 ... compression chamber；
14 ... inlet valve；
15 ... electromagnetic operating mechanism；
15b ... valve opening operation spring；
15c ... electromagnetic coil portion；
16 ... ejection valve；
19 ... compression helical spring (elastomeric element)；
20,50,60,70 ... driving means；
21 ... drive cam；
22 ... rocking arm；
22a ... swing end
22b ... base end part；
22c ... pars intermedia；
22d ... concave spherical surface portion；
22e, 22f ... recess；
23,53,63,73 ... rocking arm supporting device；
24 ... pump mounting shell (supporting parts)；
25 ... pivotal parts；
25a ... top ends；
26 ... holding is pressed from both sides；
27,57,67,77 ... force application part；
27a, 57a, 67a, 77a ... supporting end；
27b, 57b, 67b, 77b ... co-end；
27c, 57c, 67c, 77c ... middle spring body；
41,42 ... sealing ring；
67h ... hook portion；
77f ... wide diameter portion；
F1 ... the first force；
F2 ... the second force.
Claims (8)
1. a driving means, it possesses: drive cam；Rocking arm, it swings corresponding to the rotation of described driving cam；
Rocking arm supporting device, it is with described driving cam co-operating and to described rocking arm can support in the way of swinging, and
And described driving means makes following driven member move back and forth on the swaying direction of described rocking arm, described driven
Parts swing end and exert a force near the direction of described driving cam described rocking arm,
Described driving means is characterised by,
Described rocking arm supporting device has:
Pivotal parts, the base end part of described rocking arm is supported in the way of swinging freely by it；
Supporting parts, it is fixed with described pivotal parts；
Force application part, its in the described swing end side of described rocking arm by described supporting parts carry, and to described swinging end
Portion exerts a force to the side of described swaying direction,
The described side of described swaying direction is, makes the direction away from described driving cam, the described swing end of described rocking arm.
2. driving means as claimed in claim 1, it is characterised in that
The described swing end of described rocking arm is exerted a force to driving cam side by described driven member with the first force,
The described swing end of described rocking arm is exerted a force by described force application part with the second force less than described first force.
3. a driving means, it possesses: drive cam；Rocking arm, it swings corresponding to the rotation of described driving cam；
Rocking arm supporting device, it is with described driving cam co-operating and to described rocking arm can support in the way of swinging, and
And described driving means makes following driven member move back and forth on the swaying direction of described rocking arm, described driven
Parts swing end and exert a force near the direction of described driving cam described rocking arm,
Described driving means is characterised by,
Described rocking arm supporting device has:
Pivotal parts, the base end part of described rocking arm is supported in the way of swinging freely by it；
Supporting parts, it is fixed with described pivotal parts；
Force application part, its in the described swing end side of described rocking arm by described supporting parts carry, and to described swinging end
Portion exerts a force to the side of described swaying direction,
The described side of described swaying direction is, makes the described swing end of described rocking arm near the direction of described driving cam.
4. the driving means as described in any one in claim 1 to claim 3, it is characterised in that
Following situation is suppressed by described force application part, i.e. the described swing end of described rocking arm is being driven described in corresponding to
The situation of the enterprising line displacement in direction that the direction of the described swing of the rotation of moving cam is orthogonal.
5. the driving means as described in any one in claim 1 to claim 3, it is characterised in that
Described force application part have the supporting end by described supporting parts carry and the opposite side from described swaying direction with
The co-end of the described swing end engaging of described rocking arm, and also have between described supporting end and described co-end
Between middle spring body.
6. driving means as claimed in claim 5, it is characterised in that
The most described centre in the described supporting end of described force application part, described co-end and described middle spring body
Elastomer portions is made up of leaf spring.
7. driving means as claimed in claim 5, it is characterised in that
The described supporting end of described force application part and described co-end from can described driven member described toward
The split parts carrying out the mode of relative displacement on the direction of multiple motion and be mutually clamped are constituted, and described middle spring body is by quilt
The elastomeric element that compression is arranged between described supporting end and described co-end is constituted.
8. the driving means as described in any one in claim 1 to claim 3, it is characterised in that
Described driven member is made up of the input block of pump installation, and described pump installation is by the reciprocating motion of described input block
And suck or ejecting fluid in the pump housing,
Described pump installation has elastomeric element, and described input block is exerted a force by described elastomeric element near driving cam side.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/007304 WO2013098883A1 (en) | 2011-12-27 | 2011-12-27 | Drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104053867A CN104053867A (en) | 2014-09-17 |
| CN104053867B true CN104053867B (en) | 2016-12-07 |
Family
ID=48696458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180075901.1A Expired - Fee Related CN104053867B (en) | 2011-12-27 | 2011-12-27 | Driving means |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5867515B2 (en) |
| CN (1) | CN104053867B (en) |
| DE (1) | DE112011106042B4 (en) |
| WO (1) | WO2013098883A1 (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634307U (en) | 1986-06-25 | 1988-01-12 | ||
| JPS634308U (en) * | 1986-06-25 | 1988-01-12 | ||
| JPH0521163U (en) | 1991-08-30 | 1993-03-19 | 株式会社小松製作所 | Push-rod fall-out prevention device for unit indicator |
| DE4307699C2 (en) * | 1993-03-11 | 1996-03-28 | Hatz Motoren | Injection pump for diesel engine |
| JP3938339B2 (en) * | 2001-07-26 | 2007-06-27 | 本田技研工業株式会社 | Valve control device for internal combustion engine |
| JP2004308615A (en) * | 2003-04-10 | 2004-11-04 | Toyota Motor Corp | High pressure pump |
| JP2005009451A (en) * | 2003-06-20 | 2005-01-13 | Otics Corp | Valve opening and closing device |
| JP4238874B2 (en) | 2006-01-19 | 2009-03-18 | トヨタ自動車株式会社 | Camshaft support structure for internal combustion engine |
| DE102006052821A1 (en) * | 2006-11-09 | 2008-05-15 | Schaeffler Kg | Drag lever for actuating a gas exchange valve of an internal combustion engine |
| JP4865675B2 (en) * | 2007-10-26 | 2012-02-01 | 株式会社オティックス | Valve operating device and support member |
| JP5137627B2 (en) * | 2008-03-07 | 2013-02-06 | 株式会社オティックス | Rocker arm unit and method of assembling the rocker arm unit |
-
2011
- 2011-12-27 JP JP2013551030A patent/JP5867515B2/en not_active Expired - Fee Related
- 2011-12-27 WO PCT/JP2011/007304 patent/WO2013098883A1/en active Application Filing
- 2011-12-27 DE DE112011106042.4T patent/DE112011106042B4/en not_active Expired - Fee Related
- 2011-12-27 CN CN201180075901.1A patent/CN104053867B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013098883A1 (en) | 2013-07-04 |
| JP5867515B2 (en) | 2016-02-24 |
| DE112011106042T5 (en) | 2014-10-09 |
| DE112011106042B4 (en) | 2018-08-09 |
| JPWO2013098883A1 (en) | 2015-04-30 |
| CN104053867A (en) | 2014-09-17 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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