CN104053867A - Drive device - Google Patents
Drive device Download PDFInfo
- Publication number
- CN104053867A CN104053867A CN201180075901.1A CN201180075901A CN104053867A CN 104053867 A CN104053867 A CN 104053867A CN 201180075901 A CN201180075901 A CN 201180075901A CN 104053867 A CN104053867 A CN 104053867A
- Authority
- CN
- China
- Prior art keywords
- rocking arm
- force
- application
- driving cam
- drive unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- 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
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A drive device comprising a drive cam (21), a rocker arm (22) which oscillates with the rotation of the drive cam, and a rocker arm support mechanism (23) for supporting the rocker arm (22) in cooperation with the drive cam (21) while allowing the rocker arm (22) to oscillate, a driven member (12) for urging an oscillating end (22a) of the rocker arm (22) toward the drive cam (21) being moved back and forth in the oscillating direction of the rocker arm (22). The rocker arm support mechanism (23) has a pivot member (25) for supporting the proximal end (22b) of the rocker arm (22) in an oscillating fashion, a support member (24) to which the pivot member (25) is fixed, and an urging member (27) for urging the oscillating end (22a) of the rocker arm (22) one way in the oscillating direction, the urging member being supported by the support member (24) on the oscillating end (22a) of the rocker arm (22).
Description
Technical field
The present invention relates to a kind of drive unit of being moved back and forth by driver part of making by rocking arm, particularly relate to the drive unit that a kind of high pressure fuel pump that is suitable for can carrying out the fuel of internal-combustion engine is pressurised into the high pressure directly spraying drives.
Background technique
Possess the drive unit of rocking arm by rocking arm is swung corresponding to rotation input, thereby can make to be sticked in being moved back and forth by driver part of this rocking arm.Although such drive unit is widely used in the valve mechanism of internal-combustion engine, also go for other device, for example make plunger move back and forth and the fuel of internal-combustion engine be pressurised into the drive unit of the high pressure fuel pump of high pressure.
As the existing drive unit that possesses rocking arm, known have a for example following device, in this device, for the situation that stops effectively rocking arm to come off in the time that the top cover of the bearing portion that is provided with camshaft is assembled, and the rocking arm support directly over the swing fulcrum near rocking arm, coming off of rocking arm being limited is integrally formed to (for example,, with reference to patent documentation 1) on top cover.
In addition, also known to lower device, even in order also can to prevent the phenomenon that cam follower comes off from plunger in the time that unit injector drives the seizure of plunger of use, and the swing fulcrum that makes cam follower is bearing on the supporting axle on oscillation center axial direction, and by extension spring to its device to the direction application of force of slinging (for example,, with reference to patent documentation 2).
Formerly technical paper
Patent documentation
Patent documentation 1: TOHKEMY 2007-192101 communique
Patent documentation 2: Japanese Patent Publication 05-21163 communique
Summary of the invention
Invent problem to be solved
But, be provided with and separate micro gap and the existing drive unit of close rocking arm support as the swing fulcrum place at rocking arm, although it can limit coming off of rocking arm, but in the situation that by rocking arm, driven push rod or valve rod etc. block, because rocking arm cannot normally be supported, thereby may be due to shock from driving cam etc. and circumferential component is caused to damage.
Particularly by such drive unit for making by rocking arm the driving of the petrolift that plunger moves back and forth at vertical upper side, can think, when the slip blocked etc. when plunger is abnormal, the rocking arm that cannot normally be supported is because damaging from the shock of driving cam or causing the possibility of damage to uprise to circumferential component.
In addition, be bearing on the supporting axle on oscillation center axial direction in the swing fulcrum that makes cam follower, and in the existing drive unit of the intermediate portion of cam follower being sling by swinging the extension spring of fulcrum top, not only can be difficult for assembling owing to must making supporting axle pass cam follower, and can be due to the application of force of the extension spring of the use of slinging, and the friction between swing fulcrum and the supporting axle of cam follower is increased to exceed the required degree of supporting of cam follower, thereby produce the problem that durability reduces.
So, the invention provides and a kind ofly no matter occur on by driver part side any extremely, can both suppress the damage of rocking arm circumferential component, and can realize by the drive unit of the lifting of the assembling performance of driver part or durability.
For solving the method for problem
In order to solve above-mentioned problem, in petrolift involved in the present invention, provide a kind of drive unit, it possesses (1): driving cam; Rocking arm, it swings corresponding to the rotation of described driving cam; Rocking arm support mechanism, itself and described driving cam concerted action and described rocking arm is supported in the mode that can swing, and described drive unit makes following being moved back and forth on the swaying direction of described rocking arm by driver part, described by driver part to the swing end of described rocking arm near the direction application of force of described driving cam, described drive unit is characterised in that, described rocking arm support mechanism has: pivotal parts, and it supports in the mode swinging freely the base end part of described rocking arm; Support unit, is fixed with described pivot on it; Force application part, its described swing tip side at described rocking arm is supported by described support unit, and to described swing end the side application of force to described swaying direction.
In this invention, except the swing end with respect to rocking arm is from the application of force being applied to driving cam by driver part, the swing end of rocking arm is by being supported the force application part of parts carry in this swing tip side, and is biased to a side of swaying direction.Therefore, even in the case of thereby that certain is occurred in driver part side is abnormal from being diminished by the application of force of driver part side direction rocking arm, also can be by the pivotal parts of rocking arm support mechanism and force application part, utilize force application part make the driving cam that the swing end of rocking arm is biased or made rocking arm by three-point support by driver part.Its result is, no matter occur on by driver part side any abnormal, thereby all can avoid the shock of driving cam to rocking arm etc. to suppress the damage of the circumferential component causing because of the beating of rocking arm.And the locating function of rocking arm when having brought into play by the assembling of driver part, therefore can realize the lifting of assembling performance, and by reducing the friction at swing fulcrum place of rocking arm, can also improve durability.In addition, in the case of to rocking arm to the driving cam side application of force from normally being put on rocking arm by the application of force of driver part side; the pivotal parts of rocking arm by rocking arm support mechanism and by driver part and driving cam; and by three-point support, and swinging corresponding to the rotation of driving cam.
In drive unit of the present invention, be preferably, a described side of (2) described swaying direction is to make the described swing end of described rocking arm away from the direction of described driving cam.In this case, when occurring, certain is abnormal and make when impaired by the application of force of driver part, can be owing to making driving cam and rocking arm away from, the damage that therefore can avoid shock between the two to cause.
In drive unit of the present invention, be preferably, (3) described driver part with first application of force to the described swing end of described rocking arm to the described driving cam side application of force, described force application part is to be less than second application of force of described first application of force to the described swing end application of force of described rocking arm.
Accordingly, when being normal by the application of force of driver part, can make rocking arm effectively corresponding to from being swung by the rotation of the application of force of driver part side and driving cam, on the other hand, when when being reduced singularly by the application of force of driver part, because rocking arm can be biased parts to by driver part side or the driving cam side application of force, therefore can prevent that the bearing state of rocking arm from becoming unsettled situation.
In drive unit of the present invention, be preferably, a described side of (4) described swaying direction is to make the described swing end of described rocking arm near the direction of described driving cam.In this case, even in the case of from being reduced greatly by the application of force of driver part or disappearing, also can make driving cam and rocking arm contact with appropriate contact, thereby can avoid the damage causing because of shock between the two.
In drive unit of the present invention, be preferably, (5) described force application part suppresses following situation, that is, the described swing end of described rocking arm with the situation of the orthogonal enterprising line displacement of direction of the direction of the described swing of the rotation corresponding to described driving cam.Accordingly, before by the assembling of driver part, rocking arm can be orientated as to certain posture,, be positioned at swaying direction and with the orthogonal convolution direction of swaying direction on special position on, thereby can make to be sticked in rocking arm swing end by the assembling facilitation of driver part.
In drive unit of the present invention, be preferably, (6) co-end that described force application part has the supporting end that supported by described support unit and engages from the opposite side of described swaying direction and the described swing end of described rocking arm, and there is the intermediate elastomeric portion between described supporting end and described co-end.Accordingly, can changed places force application part is being configured by the range content that arranges of the rocking arm on the vibration-direction of driver part, and before the engaging of driving cam and rocking arm, also can make rocking arm be supported parts carry with certain posture.
In the drive unit of structure with described (6), be preferably, at least described intermediate elastomeric portion in the described supporting end of (7) described force application part, described co-end and described intermediate elastomeric portion is made up of leaf spring.In this case, even also can easily be configured it larger in the case of forming the length of leaf spring of intermediate elastomeric portion, thereby can realize the force application part that durability is high with lower spring constant.
In the drive unit of structure with described (6), or be preferably, (8) the described supporting end of described force application part and described co-end by with can be in described mode of carrying out relative displacement on by the described reciprocating direction of driver part and mutually a point body component for engaging form, described intermediate elastomeric portion is made up of the compressed elastic member being arranged between described supporting end and described co-end.In this case, even before the engaging of driving cam and rocking arm, also can specify the hunting range of rocking arm clearly.
In drive unit of the present invention, be preferably, (9) describedly formed by the input block of pump-unit by driver part, described pump-unit sucks or ejecting fluid in the pump housing by the to-and-fro motion of described input block, described pump-unit has elastic member, described elastic member to described input block near the described driving cam side application of force.In this case, can make the input block of pump-unit move back and forth according to the swing of the rocking arm of the rotation corresponding to driving cam, thereby form the drive unit that is suitable for high-pressure service pump.And, input block at pump-unit cannot normally move back and forth extremely because of certain, thereby make to rocking arm to the application of force of the input block of the driving cam side application of force reduce greatly or situation about disappearing under, owing to making rocking arm by three-point support by rocking arm support mechanism and driving cam, therefore the shock of driving cam to rocking arm etc. can be avoided, thereby the damage of the circumferential component causing because of the beating of rocking arm can be suppressed.In addition,, owing to having brought into play the locating function of rocking arm when the assembling of pump-unit in drive unit side, therefore can realize the lifting of the assembling performance of pump-unit.
In addition, in the case of above-mentioned second application of force to the swing end of rocking arm to the direction application of force away from driving cam, this second application of force is set to, and can resist the application of force to driving cam side brought by the deadweight of rocking arm and more than making the minimum value of rocking arm away from the application of force of driving cam.In addition, in the case of above-mentioned second application of force to the swing end of rocking arm near the direction application of force of driving cam, can be by the amount from be set as only reducing to be equivalent to second application of force to first application of force of the swing end of rocking arm by driver part.
Invention effect
According to the present invention, although extremely make from being reduced by the application of force of driver part side direction rocking arm in the case of be there is certain by driver part side, but due to the force application part of the swing tip side by rocking arm to rocking arm to by driver part or the driving cam application of force, therefore also can be by this pivotal parts and the force application part of either party and rocking arm support mechanism make rocking arm by three-point support.Therefore, can provide a kind of drive unit, this device can be avoided the shock to rocking arm that causes because of driving cam etc., thereby suppresses the damage of the circumferential component causing because of the beating of rocking arm, and can realize by the lifting of the assembling of driver part or durability.
Brief description of the drawings
Fig. 1 is the explanatory drawing of the Sketch of the drive unit of the related petrolift of the first mode of execution of the present invention.
Fig. 2 is the sectional view of the drive unit of the related petrolift of the first mode of execution of the present invention.
Fig. 3 (a) is near the plan view rocking arm in the drive unit of the related petrolift of the first mode of execution of the present invention, and Fig. 3 (b) be the figure from the observation of IIIB direction in Fig. 3 (a).
Fig. 4 is the plotted curve that represents the valve characteristic of elastic member in the drive unit of the related petrolift of the first mode of execution of the present invention and force application part, and the longitudinal axis is for representing spring load, and transverse axis is to represent as by the stroke position of the plunger of driver part.
Fig. 5 is the sectional view of the drive unit of the related petrolift of the second mode of execution of the present invention.
Fig. 6 is the sectional view of the drive unit of the related petrolift of the 3rd mode of execution of the present invention.
Fig. 7 (a) is near the plan view rocking arm in the drive unit of the related petrolift of the 3rd mode of execution of the present invention, and Fig. 7 (b) be the figure from the observation of arrow VIIB direction in Fig. 7 (a).
Fig. 8 is the sectional view of the drive unit of the related petrolift of the 4th mode of execution of the present invention.
Embodiment
Below, with reference to accompanying drawing, mode of execution preferred for this invention is described.
(the first mode of execution)
Fig. 1 to Fig. 4 is the figure that represents the related drive unit of the first mode of execution of the present invention, illustrates the example in the drive unit of the high pressure fuel pump that applies the present invention to plunger pump type.
In addition, it is upper that the petrolift of present embodiment is installed in the internal-combustion engine, for example petrol engine of the multi cylinder of four circulations (following, to be only called " motor ") that are equipped in vehicle, using the part as its fuel supply system.This petrolift is supplied with the fuel under high pressure that will stockpile to pressure accumulation in this fuel supply line to fuel supply line, described fuel supply line distributes the fuel of high pressure with respect to the sparger (Fuelinjection nozzle) of multiple direct injection use.
As shown in the Sketch in Fig. 1, the petrolift 10 of present embodiment is connected with the supply pump FP being arranged in fuel pot T by pipe arrangement L, to import and to be pressurised into the fuel that lower supply is pressed to petrolift 10 from supply pump FP.Supply pump FP is for example DYN dynamic low-pressure fuel pump, and the gasoline as fuel in fuel pot T is drawn.
In the present embodiment shown in Fig. 1 to Fig. 3, by drive unit 20, petrolift 10 is driven.
Petrolift 10 has: the pump housing 11, carrying out the mode of shift reciprocately in the axial direction and the plunger 12 that is mounted and be divided the pressurized chamber 13 of formation between the end 12a (upper end portion in Fig. 2) of this plunger 12 and the pump housing 11 with respect to the pump housing.In addition, on the pump housing 11, be formed with the ejection passage 11b that the fuel from supply pump FP is gone out to described fuel supply line side spray to the suction passage 11a (fuel introduction channel) importing in pressurized chamber 13 with by pressurized the inside in pressurized chamber 13 fuel.
Drive unit 20 possesses: driving cam 21, the rocking arm 22 swinging corresponding to the rotation of driving cam 21 and the rocking arm support mechanism 23 rocking arm 22 being supported in the mode that can swing with driving cam 21 concerted actions.In addition, rocking arm support mechanism 23 has by one and is installed on the pump mounting shell 24 in the part of outside wall portions of motor.
In the other end 12b side of the plunger 12 of petrolift 10, formed the input block (by driver part) to the direction application of force near driving cam 21 by rocking arm 22, drive unit 20 moves back and forth plunger 12 on the swaying direction of the rocking arm axial corresponding to it 22.
Particularly, as shown in Figure 2, the pump housing 11 of petrolift 10 has: multiple lip part 11f, and it has respectively bolt hole 11c; Embed not 11g, it is embedded in the pump mounting hole 24a of portion of pump mounting shell 24 (support unit), and the pump housing 11 engages with pump mounting shell 24 by being inserted into the not shown multiple bolts in multiple bolt hole 11c.In addition, the pump housing 11 has the fuel ingress pipe 11i of portion and the fuel spraying pipe 11j of portion, and the inside of this fuel ingress pipe 11i of portion is provided with fuel filter 17.
Plunger 12 is slidably inserted into one end thereof 12a side the inside of the pump housing 11, the volume of pressurized chamber 13 of the inside by making the pump housing 11 changes (increase, reduce) corresponding to the shift reciprocately of plunger 12, thereby can realize the ejection of fuel to the suction of pressurized chamber and fuel from pressurized chamber 13.
In addition, plunger 12 is driven via rocking arm 22 and by driving cam 21 from its another end 12b side.
Driving cam 21 is arranged in the cylinder head (not detailed icon) that forms pump mounting shell 24, and is driven by the rotating power from motor.This driving cam 21 is installed on the exhaust cam shaft (not detailed icon) of for example motor by one.
In addition, the 12c of the spring-loaded portion that is attached with of another end 12b of plunger 12, compression helical spring 19 (elastic member) is loaded between this spring receiving portion 12c and the pump housing 11 with compressive state.In addition, plunger 12 direction (in Fig. 2 direction) the down application of force that Chang Shixiang increases the volume of pressurized chamber 13 by compression helical spring 19.Therefore, when being driven in rotation from the power of motor, according to the reciprocally swinging of the rocking arm 22 of the rotation corresponding to this driving cam 21, and plunger 12 is moved back and forth in the axial direction at driving cam 21.
Rocking arm 22 by be sticked in plunger 12 another end 12b swing end 22a, be supported in base end part 22b in pump mounting shell 24 sides and form being sticked in the intermediate portion 22c that cylinder 22r on driving cam 21 keeps in mode freely of rotation.This rocking arm 22 is together with the 12b of another end of plunger 12, lubricated by the engine motor oil in cylinder head (from outside machine oil).
The front and back of pressurized chamber 13,, in the suction side of pressurized chamber 13 and ejection side, be provided with suction valve 14 and ejection valve 16, described suction valve sucks and performance adverse current prevents that the one-way valve of function forms by allowing at downstream place compared with fuel filter 17 (and not shown suction passage chamber) to the fuel of pressurized chamber 13, and ejection valve 16 is by allowing that ejection and performance adverse current from the fuel of pressurized chamber 13 prevent that the one-way valve of function forms.
Suction valve 14 by the valve seat 14b of the tabular valve body 14a that suction passage 11a is opened and closed and ring-type with make valve body 14a and valve seat 14b butt to reach predetermined suction press (with supply with press compared with and reduce predetermined suction valve and open the pressure that valve is pressed) the valve spring 14c of the valve state that closes form.
Ejection valve 16 by the valve seat 16b of the tabular valve body 16a that ejection passage 11b is opened and closed and ring-type with make valve body 16a and valve seat 16b butt to the valve spring 16c formation that reaches predetermined ejection and press the valve state that closes of (exceed predetermined ejection valve and open the pressure that valve is pressed compared with the pressure of the fuel in fuel supply line).
Therefore, at plunger 12 so that the mode of the volume reducing of pressurized chamber 13 when carrying out displacement above in Fig. 1, closing under valve state of suction valve 14, the fuel in pressurized chamber 13 pressurizeed and makes its pressure rise, driving valve and fuel is sprayed from pressurized chamber 13 thereby can make to spray valve 16.In addition, at plunger 12 so that the mode that the volume of pressurized chamber 13 increases when carrying out displacement below in Fig. 1, the fuel in pressurized chamber 13 is depressurized and its pressure drop, thereby can make suction valve 14 drive valve closing under valve state of valve 16 of ejection.
In addition, on suction valve 14, be provided with electromagnetic operating mechanism 15.
Electromagnetic operating mechanism 15 has functional unit 15a, operating spring 15b, electromagnetic coil portion 15c, functional unit 15a is to be maintained at slidably in valve body 11 with the opposed mode of valve body 14a, operating spring 15b to this functional unit 15a with compared with the application of force of the valve spring 14c of suction valve 14 and the larger application of force towards valve body 14a open the valve side application of force, electromagnetic coil portion 15c can resist out the application of force of valve operating spring 15b and make functional unit 15a carry out displacement to the valve side of closing of valve body 14a.
This electromagnetic operating mechanism 15 is when making electromagnetic coil portion 15c switch on the excitation of carrying out (when on state), functional unit 15a can be drawn to electromagnetic coil portion 15c side draught, and can the valve body 14a of suction valve 14 be recovered to closing valve direction by the application of force of valve spring 14c.In addition, electromagnetic operating mechanism 15 is stopped and makes it when non-excited state (off state) in the energising of electromagnetic coil portion 15c, can be by opening valve operating spring 15b, thus the application of force of opposing valve spring 14c and make forcibly suction valve 14 drive valve.Therefore, due to electromagnetic operating mechanism 15 by the energising to electromagnetic coil portion 15c to suction valve 14 is controlled during driving forcibly valve, therefore can during the pressurization of the fuel in pressurized chamber 13, carry out variable control to what implement by plunger 12.
On the other hand, except pump mounting shell 24, rocking arm supporting mechanism 23 also has: pivotal parts 25, and it is supported by pump mounting shell 24 in the mode being sticked on the base end part 22b of rocking arm 22; Holding clamp 26, it is installed in pivotal parts 25 to prevent the mode that the base end part 22b of rocking arm 22 departs from from the tip portion 25a of pivotal parts 25, and is made up of leaf spring (can be also spring wire rod); Force application part 27, it is supported by pump mounting shell 24 to the mode of a side application of force of this swaying direction with the swing end 22a to rocking arm 22.
At this, pivotal parts 25 is made up of the roughly cylindrical spindle unit being vertically fixed on pump mounting shell 24, and in this hemispheric tip portion 25a place and holding clamp 26 concerted actions, and to the base end part 22b of swing fulcrum that becomes rocking arm 22 keeping in the enterprising line tilt campaign of direction arbitrarily and the mode of carrying out postural change.In addition, holding clamp 26 is formed as, and between the base end part 22b of rocking arm 22 and the tip portion 25a of pivotal parts 25, gives appropriate interface pressure, so that the swing fulcrum (oscillation center) of rocking arm 22 is remained on certain position.In addition, on the base end part 22b of rocking arm 22, be formed with the concave spherical surface portion (without symbol) corresponding to the tip portion 25a of pivotal parts 25.
Force application part 27 is configured in respect to rocking arm 22 in the swing end 22a side in its degree direction,, be configured in away from the base end part 22b of rocking arm 22 in the side near shake end 22a, and be sticked in the swing end 22a of rocking arm 22 from this front side.In addition, the swing end 22a of force application part 27 to rocking arm 22, for example, to the direction away from driving cam 21 (upper side in Fig. 1) application of force.
This force application part 27 has the supporting end 27a being supported by pump mounting shell 24 in the swing end of rocking arm 22 22a side and is sticked in the co-end 27b of the swing end 22a of rocking arm 22 from the opposite side (side upward of the lower side from Fig. 1) of swaying direction, and has the 27c of intermediate elastomeric portion between supporting end 27a and co-end 27b.And at least intermediate elastomeric 27c of portion in supporting end 27a, co-end 27b and the 27c of intermediate elastomeric portion of this force application part 27 is made up of leaf spring.
More specifically, in the present embodiment, force application part 27 entirety become the leaf spring of using metallic material to form by spring, as shown in Figure 2, the 27c of intermediate elastomeric portion extends to the lower side with respect to the supporting end 27a extending in the horizontal direction, and make co-end 27b from the underpart of the 27c of this intermediate elastomeric portion towards the swing end of rocking arm 22 22a obliquely upward side extend.
In addition, force application part 27 is bending between supporting end 27a, co-end 27b and the 27c of intermediate elastomeric portion, and length is larger for the size of this banded width direction.In addition, the size of the banded width direction of force application part 27 can be directed to support unit 27a, co-end 27b and the 27c of intermediate elastomeric portion and change respectively, also can be identical.
The application of force upward (second application of force) to from the swing end 22a of rocking arm 22 to the force application part 27 of the direction application of force away from driving cam 21, with swing end 22a with to rocking arm 22 to the mode of the driving cam 21 side application of forces to plunger 12 to compared with the application of force down (hereinafter referred to as " first application of force ") of the compression helical spring 19 (elastic member) of the lower side application of force in Fig. 1 and less.
In addition, the concavo-convex swing end 22a that is sticked in rocking arm 22 of co-end 27b of force application part 27, force application part 27 can suppress following situation,, the swing end 22a of rocking arm 22 the direction different from the swaying direction (above-below direction in Fig. 1, Fig. 2) of the rotation corresponding to driving cam 21, particularly with the situation of the enterprising line displacement of the orthogonal direction of this swaying direction (Fig. 2 with the orthogonal direction of paper).
Particularly, as shown in Fig. 3 (a) and Fig. 3 (b); be formed with the recess 22e engaging in the mode that can slide for another end 12b of plunger 12 in the one side side of the swing end 22a of rocking arm 22, in the another side side of the swing end of rocking arm 22 22a, be formed with the recess 22f engaging in the mode that can slide for the co-end 27b of force application part 27.
As shown in Figure 4, the application of force down from compression helical spring 19 (hereinafter referred to as the first application of force) f1 that swing end 22a from from plunger 12 to rocking arm 22 applies, thereby the bosom in plunger 12 enters into the pump housing 11 is made as pressurized chamber 13 on the position of top dead center TDC of minimum volume and reaches maximum, thereby and retreat the position that pressurized chamber 13 is made as to the lower dead center BDC of maximum volume at plunger 12 from the position of this top dead center TDC and reach minimum.
On the other hand, put on the second application of force f2 the swing end 22a of rocking arm 22 from force application part 27, although be minimum on the position of the top dead center TDC of plunger 12, on the position of the lower dead center BDC of plunger 12, be maximum, but become compared with the minimum value of locational the first application of force f1 of lower dead center BDC and less value.This second application of force f2 is set to, and can resist the application of force to driving cam 21 sides producing because of the deadweight of rocking arm 22, and to more than the minimum value f3 that makes rocking arm 22 away from the application of force of the vertical direction top of driving cam 21.In addition, although the spring performance of force application part 27 can be this non-linear property represented by the variation of the second application of force f2, can be also linear spring performance, the spring constant of force application part 27 is less than the spring constant of compression helical spring 19.
In addition, more specifically, the pump housing 11 is by axially adjacent and mutually by the seal ring chimeric multiple tubulars that form in liquid-tight ground of 0 ring etc. or part (without the symbol) formation of ring-type.
In addition,, in the lower end side in the figure of the pump housing 11 exposing, be provided with the oil sealing holding part 18 that the multiple seal rings 41,42 to being sticked in plunger 12 keep in pump mounting shell 24.At this, seal ring 41 is for sealing plunger 12 and the slip slotted section of the pump housing 11, thereby suppress the fuel seal ring of fuel leakage, seal ring 42 is, the oil sealing that the engine motor oil in cylinder head is suppressed to the immersion of the slip slotted section of plunger 12 and the pump housing 11.
Next effect is described.
With as the drive unit 20 of the petrolift 10 of the present embodiment that forms of above-mentioned mode in, in the running of motor, driving cam 21 is rotated in Fig. 2 in the represented sense of rotation of white arrow mark.And, in the case of to rocking arm 22 to the driving cam 21 side application of forces normally put on the swing end 22a of rocking arm 22 from first application of force down in Fig. 1 of plunger 12 sides; rocking arm 22 by three-point support, and carries out reciprocally swinging on above-below direction corresponding to the rotation of driving cam 21 by pivotal parts 25, plunger 12 and driving cam 21 in the drawings.
Under this state, except first application of force that the swing end 22a with respect to rocking arm 22 applies towards driving cam 21 sides from plunger 12, on the 22a of the swing end of rocking arm 22, be applied with from force application part 27 second application of force upward.
At this, suppose that normal sliding mode between plunger 12 and the pump housing 11 is because certain is abnormal and impaired.For example, plunger 12 burn-back in the pump housing 11 sides, or owing to making the sliding of plunger 12 impaired owing to entering foreign matter between plunger 12 and the pump housing 11.In this case, plunger 12 is forced to move to top dead center by driving cam 21, and cannot successfully decline by the application of force from compression helical spring 19, thereby makes rocking arm 22 reduce significantly to first application of force of the application of force of driving cam 21 sides.
But, even in the case of this first application of force from plunger 12 to rocking arm 22 reduces greatly; rocking arm 22 also can be by the pivotal parts of rocking arm support mechanism 23 25 and force application part 27 and the plunger 12 that utilizes force application part 27 that the swing end 22a of rocking arm 22 is biased, and by three-point support.
Its result is, even if there is certain abnormal in the situation that in plunger 12 sides, also can avoid effectively rocking arm 22 to be subject to the situation from shock, the beating etc. of driving cam 21, thereby can suppress the damage of this circumferential component causing because of the beating of rocking arm 22.
And, in the stage before petrolift 10 is installed in drive unit 20; pivotal parts 25 of rocking arm 22 by rocking arm support mechanism 23 and force application part 27 and be supported with certain posture; therefore can make drive unit 20 bring into play the function of the location of rocking arm 22, thereby can promote other the assembling performance of petrolift 10 engaging to the rocking arm 22 of plunger 12.
In addition, in the present embodiment, be configured in the force application part 27 of the swing end 22a side of rocking arm 22, because the swing end 22a to rocking arm 22 is to the application of force in the direction away from driving cam 21, even therefore because certain makes from the application of force of plunger 12 impaired extremely, but owing to making driving cam 21 away from rocking arm 22, therefore also can avoid the damage causing because of shock between the two.In addition,, even under normal state, the frictional force at the base end part 22b place of rocking arm 22 can or not exceed fulcrum due to the application of force from force application part 27 yet and keep needed degree to raise, thereby has promoted the durability of drive unit 20.
In addition, in present embodiment, plunger 12 to the swing end 22a of rocking arm 22 with first application of force to the driving cam 21 side application of forces, the swing end 22a of force application part 27 to rocking arm 22, carries out the application of force with second application of force that is less than first application of force.Therefore, in first application of force while being normal, can make rocking arm 22 swing corresponding to the rotation of the application of force from plunger 12 sides and driving cam 21 effectively, on the other hand, when first application of force reduces and makes singularly, can, by from second application of force of force application part 27, rocking arm 22 is biased to plunger 12 sides, be in an unsure state from the bearing state that has prevented rocking arm 22.
In addition, in the present embodiment, because force application part 27 can suppress following situation,; the shake end 22a of rocking arm 22 with the situation of the orthogonal enterprising line displacement of direction of the swaying direction of the rotation corresponding to driving cam 21; therefore; before the assembling of plunger 12; can make rocking arm 22 orientate certain posture as; be for example positioned on the special position in swaying direction upper and lower in the figure of rocking arm 22 and the convolution direction orthogonal with it, thereby can make the assembling facilitation of the plunger 12 of the swing end 22a that is sticked in rocking arm 22.
In addition, the rocking arm 22 that force application part 27 can be on the vibration-direction of plunger 12 the range content configuration of changing places is set, even and if also can make rocking arm 22 be supported by pump mounting shell 24 with certain posture before the engaging of driving cam 21 and rocking arm 22.And, even if the length of the leaf spring of formation force application part 27 is larger, but owing to being configured simply, realize with low spring constant the force application part 27 that durability is higher thereby therefore also can set enough amount of deflection brachiums and optimum width.
In addition, as driven input block that is become petrolift 10 by the plunger 12 of driver part by drive unit 20, the side application of force by compression helical spring 19 to close driving cam 21 among the swaying direction of rocking arm 22.Therefore, can make the plunger 12 of petrolift 10 move back and forth along with the swing of the rocking arm 22 of the rotation corresponding to driving cam 21, and become the drive unit 20 that is suitable for high-pressure service pump.
So, in the present embodiment, thereby even if there is certain abnormal generation from the application of force of plunger 12 side direction rocking arms 22 reduces in plunger 12 sides, but by by force application part 27 to rocking arm 22 to the plunger 12 side application of forces, thereby also can make rocking arm 22 by three-point support by the pivotal parts 25 of plunger 12 and rocking arm support mechanism 23 and force application part 27.Therefore, can provide and avoid the shock of driving cam 21 to rocking arm 22 etc., thereby can suppress the damage of the circumferential component causing because of the beating of rocking arm 22, and the drive unit 20 of the lifting of assembling performance can realize the assembling of plunger 12 time and durability.
(the second mode of execution)
Fig. 5 is the figure that represents the related drive unit of second embodiment of the invention.
In addition, the below drive unit of the petrolift of each mode of execution of explanation, be the drive unit that petrolift driven identical with petrolift 10 in above-mentioned the first mode of execution, although different on the knot of the force application part of rocking arm support mechanism forms with the first mode of execution, but other structure and the first mode of execution are roughly the same formation, therefore, only to being elaborated with the difference of the first mode of execution.
As shown in Figure 5, the drive unit 50 of present embodiment possesses: driving cam 21, with respect to the rotation of driving cam 21 and the rocking arm 22 swinging and the rocking arm support mechanism 53 rocking arm 22 being supported in the mode that can swing with driving cam 21 concerted actions.In addition, rocking arm support mechanism 53 has by one and is installed on the pump mounting shell 24 in the part of outside wall portions of motor.
Particularly; rocking arm support mechanism 53 has: pump mounting shell 24, pivotal parts 25, holding clamp 26 and force application part 57, the mode of the direction application of force upward of described force application part 57 in using the swing end 22a to rocking arm 22 to Fig. 5 of the side as this swaying direction is supported by pump mounting shell 24.
Force application part 57, by supporting end 57a and co-end 57b are formed with point body component that can carry out on the vibration-direction of plunger 12 together with the mode chimeric (engaging) of relative displacement, wherein, described supporting end 57a is vertically supported on pump mounting shell 24, and described co-end 57b is sticked in the swing end 22a of rocking arm 22.And, compressed being arranged between described supporting end 57a and co-end 57b of the 57c of intermediate elastomeric portion being formed by compression helical spring.
The supporting end 57a of force application part 57 is the parts of the column of extending in vertical direction, has wide diameter portion 57f on its underpart.The terminal side of the co-end 57b of force application part 57 is can the mode of lifting be supported in vertical direction with respect to supporting end 57a, and its tip portion side is sticked in the swing end 22a of rocking arm 22.In addition, the 57c of intermediate elastomeric portion is to be supported end 57a guiding around the mode of supporting end 57a, and in the mode to the upside application of force (pushing) in figure to co-end 57b, between the terminal side of co-end 57b and the wide diameter portion 57f of supporting end 57a, be configured with compressive state.
This force application part 57 is configured in the swing end 22a side on its length direction with respect to rocking arm 22, that is, and and a close side that swings end 22a away from the base end part 22b of rocking arm 22.In addition, force application part 57 to the swing end 22a of rocking arm 22 to the direction that for example makes it away from driving cam 21 (upper side in Fig. 5) application of force.
The swing end 22 of rocking arm 22 is less than to the second application of force f2 upward that makes its force application part 57 away from the direction application of force of driving cam 21, from first application of force f1 down of compression helical spring 19, described compression helical spring 19 with the shake end 22a to rocking arm 22 to the driving cam 21 side application of forces mode to plunger 12 application of force to the lower side.
In addition, the concavo-convex swing end 22a that is sticked in rocking arm 22 of co-end 57b of force application part 57, force application part 57 can suppress following situation,, the swing end 22a of rocking arm 22 the direction different from the swaying direction (above-below direction in Fig. 5) of the rotation corresponding to driving cam 21, particularly with the situation of the enterprising line displacement of the orthogonal direction of this swaying direction (with the orthogonal direction of the paper of Fig. 5).
Although the spring performance of the 57c of intermediate elastomeric portion of force application part 57 can be both the non-linear property represented by the variation of the second application of force f2, also can be linear spring performance, but the spring constant of force application part 57 be less than the spring constant of compression helical spring 19.
In the present embodiment, thereby although there is certain abnormal generation from the application of force of plunger 12 side direction rocking arms 22 reduces in plunger 12 sides, but due to by force application part 57 to rocking arm 22 to the plunger 12 side application of forces, therefore also can make rocking arm 22 by three-point support by plunger 12 and pivotal parts 25 and the force application part 57 of rocking arm support mechanism 53.Therefore, avoid driving cam 21 shock to rocking arm 22 etc. can suppress the damage of the circumferential component causing because of the beating of rocking arm 22 thereby can provide, and the drive unit 50 of the lifting of assembling performance can realize the assembling of plunger 12 time or durability.
(the 3rd mode of execution)
Fig. 6 and Fig. 7 are the figure that represents the related drive unit of the 3rd mode of execution of the present invention.
As shown in Figure 6, in the drive unit 60 of present embodiment; rocking arm support mechanism 63 has: pump mounting shell 24, pivotal parts 25, holding clamp 26 and force application part 67, described force application part 67 is using the swing end 22a to rocking arm 22 to the side as this swaying direction, the mode of the application of force of direction down in Fig. 6 is supported on pump mounting shell 24.
Force application part 67 is configured in the swing end 22a side on its length direction with respect to rocking arm 22, thus to the swing end 22a of rocking arm 22 to the direction application of force that makes it away from driving cam 21.
In addition, force application part 67 has: supporting end 67a, and it is supported by pump mounting shell 24 in the 22a side of the swing end of the base end part 22b away from rocking arm 22; Co-end 67b, on it, set up a pair of hook portion 67h, described hook portion 67h engages with the swing end 22a of rocking arm 22 from the opposite side (side downward of the upper side from Fig. 6) of swaying direction, and force application part 67 has the 67c of intermediate elastomeric portion between supporting end 67a and co-end 67b.And at least intermediate elastomeric 67c of portion in supporting end 67a, co-end 67b and the 67c of intermediate elastomeric portion of this force application part 67 is made up of leaf spring.
More specifically, in the present embodiment, force application part 67 becomes the leaf spring that its entirety uses metallic material to form by spring, as shown in Figure 6, the 67c of intermediate elastomeric portion extends to the lower side with respect to the supporting end 67a extending in the horizontal direction, co-end 67b from the underpart of the 67c of this intermediate elastomeric portion towards the swing end 22a of rocking arm 22 and obliquely upward side extend.
In addition, a pair of hook portion 67h being wholely set on the width direction both sides of co-end 67b, from being sticked in from the opposite side of swaying direction the swing end 22a of rocking arm 22, thus to rocking arm 22 to the direction application of force that makes it near driving cam 21.
The swing end 22a of rocking arm 22 is less than to second application of force f2 down of force application part 67 of the direction application of force that approaches driving cam 21, from first application of force f1 down of compression helical spring 19, described compression helical spring 19 with the shake end 22a to rocking arm 22 to the mode of the driving cam 21 side application of forces to plunger 12 application of force to the lower side.
In addition, the a pair of hook portion 67h of co-end 67b of force application part 67 is sticked on the bi-side of swing end 22a of rocking arm 22, thereby force application part 67 can suppress following situation,, the swing end 22a of rocking arm 22 the direction different from the swaying direction (above-below direction in Fig. 6) of the rotation corresponding to driving cam 21, particularly with the situation of the enterprising line displacement of the orthogonal direction of this swaying direction (with the orthogonal direction of the paper of Fig. 6).
Although the spring performance of the 67c of intermediate elastomeric portion of force application part 67 can be both non-linear property, can be also linear property, the spring constant of force application part 67 is less than the spring constant of compression helical spring 19.
In the present embodiment, thereby although there is certain abnormal generation from the application of force of plunger 12 side direction rocking arms 22 reduces in plunger 12 sides, but due to by force application part 67 to rocking arm 22 to the driving cam 21 side application of forces, therefore also can make rocking arm 22 by three-point support by driving cam 21 and pivotal parts 25 and the force application part 67 of rocking arm support mechanism 63.Therefore, thereby can provide the damage of the circumferential component that shock of avoiding driving cam 21 to avoid rocking arm 22 etc. can cause because of the beating of rocking arm 22, and the drive unit 60 of the lifting of assembling performance can realize the assembling of plunger 12 time or durability.
In addition, in present embodiment, due to the second application of force f2 to the swing end 22a of rocking arm 22 to the direction application of force that makes it near driving cam 21, therefore the first application of force f1 of the swing end 22a from from plunger 12 to rocking arm 22 can be set as reducing the amount corresponding with the second application of force f2, so more favourable to the aspect of assembly operation or durability.
(the 4th mode of execution)
Fig. 8 is the figure that represents the related drive unit of the 4th mode of execution of the present invention.
As shown in Figure 8, the drive unit 70 of present embodiment possesses: driving cam 21, with respect to the rotation of driving cam 21 and the rocking arm 22 swinging and the rocking arm support mechanism 73 rocking arm 22 being supported in the mode that can swing with driving cam 21 concerted actions.In addition, rocking arm support mechanism 73 has by one and is installed on the pump mounting shell 24 in the part of outside wall portions of motor.
Particularly; rocking arm support mechanism 73 has: pump mounting shell 24, pivotal parts 25, holding clamp 26 and force application part 77, the mode of the upward direction application of force of described force application part 77 in using the swing end 22a to rocking arm 22 to Fig. 8 of the side as its swaying direction is supported on pump mounting shell 24.
Force application part parts 77 are by supporting end 77a and co-end 77b are formed with point body component that can carry out on the vibration-direction of plunger 12 together with the mode chimeric (engaging) of relative displacement, wherein, supporting end 77a is vertically supported on pump mounting shell 24, and described co-end 77b is sticked in the swing end 22a of rocking arm 22.And, compressed being arranged between described supporting end 77a and co-end 77b of the 77c of intermediate elastomeric portion being formed by compression helical spring.
The supporting end 77a of force application part 77 is the parts of the column of extending in vertical direction, has wide diameter portion 77f on this underpart.The terminal side of the co-end 77b of force application part 77 is with respect to supporting end 77a can the mode of lifting being supported in vertical direction, and its tip portion side is sticked in the swing end 22a of rocking arm 22.In addition, the 77c of intermediate elastomeric portion to be to be supported end 77a guiding around the mode of supporting end 77a, and so that co-end 77b is configured with compressive state between the terminal side of co-end 77b and the wide diameter portion 77f of supporting end 77a to the mode of the downside application of force (pushing) in figure.
This force application part 77 is configured in the swing end 22a side on its length direction with respect to rocking arm 22, that is, and and a close side that swings end 22a away from the base end part 22b of rocking arm 22.In addition, force application part 77 to the swing end 22a of rocking arm 22 near a side of swaying direction, direction (lower side in Fig. 8) application of force of for example driving cam 21.
The swing end 22a of rocking arm 22 is less than to the first application of force f1 down from compression helical spring 19 to second application of force f2 down of the force application part 57 of the driving cam 21 side application of forces, described compression helical spring 19 with the shake end 22a to rocking arm 22 to the mode of the driving cam 21 side application of forces to plunger 12 application of force to the lower side.
In addition, between the co-end 77b of force application part 77 is sandwiched in another end 12b of plunger 12, and on the 22a of the swing end of rocking arm 22, be sticked in the planar part of these width direction both sides.
Although the spring performance of the 77c of intermediate elastomeric portion of force application part 77 is for being both non-linear property, can be also linear property, the spring constant of force application part 77 is less than the spring constant of compression helical spring 19.
In the present embodiment, thereby although there is certain abnormal generation from the application of force of plunger 12 side direction rocking arms 22 reduces in plunger 12 sides, but due to by force application part 27 to rocking arm 22 to the driving cam 21 side application of forces, therefore also can make rocking arm 22 by three-point support by driving cam 21 and pivotal parts 25 and the force application part 77 of rocking arm support mechanism 73.Therefore, can provide and make driving cam 21 and rocking arm 22 with appropriate contact press contacts, and avoid the shock of driving cam 21 to rocking arm 22 etc., from suppressing the damage of the circumferential component causing because of the beating of rocking arm 22, and, the drive unit 70 of the assembling performance can realize the assembling of plunger 12 time or the lifting of durability.In addition, by force application part 77, owing to can clearly specifying the hunting range of rocking arm 22, and the first application of force f1 can be set as reducing the amount corresponding with the second application of force f2, and then to assembly operation or therefore the aspect of durability is more favourable.
In addition, although adopted in above-mentioned each mode of execution, the structure that pivotal parts 25, rocking arm 22, force application part 27,57,67 or 77 are configured in the mode of straight line on the length direction of rocking arm 22, but force application part 27,57,67 or 77 also can adopt the configuration departing from from the axis of the length direction of rocking arm 22.In addition, although in above-mentioned each mode of execution, any one in drive unit 20,50,60,70 is all the device that the petrolift 10 of high pressure pressurization use is driven, but that drive unit of the present invention also goes for being suitable for is that the pump of the plug type beyond petrolift drives, have in other device of on the swaying direction of rocking arm reciprocating input block.In addition, although rocking arm has all adopted cylinder rocking arm, but as long as can make the contact drop at 22d place of concave spherical surface portion of base end part 22b of rocking arm 22 low to the formation of paying the identical journey of situation with cylinder, also can between rocking arm and driving cam, get involved the inserting that other are installed, also can adopt the structure such corresponding to the rotation key element of multiple protuberances is installed in driving cam side.
As described above, in drive unit involved in the present invention, thereby although in the case of being there is certain in driver part side extremely from being diminished by the application of force of driver part side direction rocking arm, but due to the force application part of the swing tip side by rocking arm to rocking arm to by driver part or the driving cam application of force, therefore also can be by it pivotal parts and the force application part of either party and rocking arm support mechanism make rocking arm by three-point support.Therefore, can provide and avoid the shock of driving cam to rocking arm etc., thereby can suppress the damage of the circumferential component causing because of the beating of rocking arm, and, the drive unit of the assembling performance can realize the assembling of driver part time or the lifting of durability.This present invention is for making by rocking arm by the reciprocating drive unit entirety of driver part, and it is useful being particularly suitable for all drive units that the high pressure fuel pump to the fuel of internal-combustion engine being pressurised into the high pressure that can directly spray drives.
Symbol description
10 ... petrolift;
11 ... the pump housing;
11a ... suction passage;
11b ... ejection passage;
12 ... plunger (input block, by driver part);
12a ... an end;
12b ... another end;
13 ... pressurized chamber;
14 ... suction valve;
15 ... electromagnetic operating mechanism;
15b ... open valve operating spring;
15c ... electromagnetic coil portion;
16 ... ejection valve;
19 ... compression helical spring (elastic member);
20,50,60,70 ... drive unit;
21 ... driving cam;
22 ... rocking arm;
22a ... swing end
22b ... base end part;
22c ... intermediate portion;
22d ... concave spherical surface portion;
22e, 22f ... recess;
23,53,63,73 ... rocking arm support mechanism;
24 ... pump mounting shell (support unit);
25 ... pivotal parts;
25a ... tip portion;
26 ... keep with folder;
27,57,67,77 ... force application part;
27a, 57a, 67a, 77a ... supporting end;
27b, 57b, 67b, 77b ... co-end;
27c, 57c, 67c, 77c ... intermediate elastomeric portion;
41,42 ... seal ring;
67h ... hook portion;
77f ... wide diameter portion;
F1 ... first application of force;
F2 ... second application of force.
Claims (9)
1. a drive unit, it possesses: driving cam; Rocking arm, it swings corresponding to the rotation of described driving cam; Rocking arm support mechanism, itself and described driving cam concerted action and described rocking arm is supported in the mode that can swing, and described drive unit makes following being moved back and forth on the swaying direction of described rocking arm by driver part, described by driver part to the swing end of described rocking arm near the direction application of force of described driving cam
Described drive unit is characterised in that,
Described rocking arm support mechanism has:
Pivotal parts, it supports in the mode swinging freely the base end part of described rocking arm;
Support unit, is fixed with described pivot on it;
Force application part, its described swing tip side at described rocking arm is supported by described support unit, and to described swing end the side application of force to described swaying direction.
2. drive unit as claimed in claim 1, is characterized in that,
A described side of described swaying direction is to make the described swing end of described rocking arm away from the direction of described driving cam.
3. as claim 1 or drive unit claimed in claim 2, it is characterized in that,
Described by driver part with first application of force to the described swing end of described rocking arm to the described driving cam side application of force,
Described force application part is to be less than second application of force of described first application of force to the described swing end application of force of described rocking arm.
4. drive unit as claimed in claim 1, is characterized in that,
A described side of described swaying direction is to make the described swing end of described rocking arm near the direction of described driving cam.
5. if claim 1 is to the drive unit as described in any one in claim 4, it is characterized in that,
Described force application part suppresses following situation, that is, the described swing end of described rocking arm with the situation of the orthogonal enterprising line displacement of direction of the direction of the described swing of the rotation corresponding to described driving cam.
6. if claim 1 is to the drive unit as described in any one in claim 5, it is characterized in that,
The co-end that described force application part has the supporting end that supported by described support unit and engages from the opposite side of described swaying direction and the described swing end of described rocking arm, and there is the intermediate elastomeric portion between described supporting end and described co-end.
7. drive unit as claimed in claim 6, is characterized in that,
At least described intermediate elastomeric portion in the described supporting end of described force application part, described co-end and described intermediate elastomeric portion is made up of leaf spring.
8. drive unit as claimed in claim 6, is characterized in that,
The described supporting end of described force application part and described co-end by with can be in described mode of carrying out relative displacement on by the described reciprocating direction of driver part and mutually a point body component for engaging form, described intermediate elastomeric portion is made up of the compressed elastic member being arranged between described supporting end and described co-end.
9. if claim 1 is to the drive unit as described in any one in claim 8, it is characterized in that,
Describedly be made up of the input block of pump-unit by driver part, described pump-unit sucks or ejecting fluid in the pump housing by the to-and-fro motion of described input block,
Described pump-unit has elastic member, described elastic member to described input block near the described driving cam side application of force.
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 true CN104053867A (en) | 2014-09-17 |
| CN104053867B 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) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119034A (en) * | 1993-03-11 | 1996-03-20 | 哈兹电机制造公司 | Injection pump for diesel engines |
| CN1533469A (en) * | 2001-07-26 | 2004-09-29 | 本田技研工业株式会社 | Valve control apparatus for IC engine |
| JP2005009451A (en) * | 2003-06-20 | 2005-01-13 | Otics Corp | Valve opening and closing device |
| WO2008055785A1 (en) * | 2006-11-09 | 2008-05-15 | Schaeffler Kg | Cam follower for actuating a gas exchange valve of an internal combustion engine |
| JP2009108698A (en) * | 2007-10-26 | 2009-05-21 | Otics Corp | Valve gear, and support member |
| CN101960102A (en) * | 2008-03-07 | 2011-01-26 | 欧德克斯有限公司 | Rocker arm unit and method of assembling rocker arm unit |
Family Cites Families (5)
| 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 |
| JP2004308615A (en) * | 2003-04-10 | 2004-11-04 | Toyota Motor Corp | High pressure pump |
| 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 |
-
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
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119034A (en) * | 1993-03-11 | 1996-03-20 | 哈兹电机制造公司 | Injection pump for diesel engines |
| CN1533469A (en) * | 2001-07-26 | 2004-09-29 | 本田技研工业株式会社 | Valve control apparatus for IC engine |
| JP2005009451A (en) * | 2003-06-20 | 2005-01-13 | Otics Corp | Valve opening and closing device |
| WO2008055785A1 (en) * | 2006-11-09 | 2008-05-15 | Schaeffler Kg | Cam follower for actuating a gas exchange valve of an internal combustion engine |
| JP2009108698A (en) * | 2007-10-26 | 2009-05-21 | Otics Corp | Valve gear, and support member |
| CN101960102A (en) * | 2008-03-07 | 2011-01-26 | 欧德克斯有限公司 | Rocker arm unit and method of assembling rocker arm unit |
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 |
| CN104053867B (en) | 2016-12-07 |
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Granted publication date: 20161207 Termination date: 20191227 |