CN103670804A - Directional deflection oil needle lifting device of diaphragm type air throttle for automobile - Google Patents

Abstract

Provided is a directional deflection oil needle lifting device of a diaphragm type air throttle for an automobile. The directional deflection oil needle lifting device of the diaphragm type air throttle for the automobile comprises a negative-pressure chamber, a plunger, a reset compression spring, an oil needle fixing frame, an oil needle clamping pad, a shaft gasket and an oil needle. The directional deflection oil needle lifting device of the diaphragm type air throttle for the automobile is characterized in that the hole bottom surface of a four-level stepped hole is of a step surface shape, an upper step surface is a small tangential arch-shaped surface, a lower step surface is a large tangential arch-shaped surface, the separation distance between the midpoint of a tangential line of a tangential edge of the small tangential arch-shaped surface of the upper step surface and the axis of the four-level stepped hole of the plunger is larger than the radius of a five-level stepped hole of the plunger and smaller than the radius of an outer circle of the oil needle clamping pad (5), and the height difference between the lower step surface and the upper step surface is 0.5mm. The directional deflection oil needle lifting device of the diaphragm type air throttle for the automobile has the advantages that the deflection direction of the oil needle can be fixed through the upper step surface and the lower step surface of the four-level stepped hole of the plunger; when the deflection direction of the oil needle is fixed, air turbulence caused by the oil needle is relatively stable, stability of the outlet oil quantity, stability of atomizing quantity and stability of emission of finished automobiles in the process of production of air throttles of the same specification are improved, and the requirement of China for automotive exhaust gas emission is met.

Description

A kind of spindle lowering or hoisting gear of directed beat of vehicle membrane chip air throttle

Technical field:

The present invention relates to automobile-used air throttle structure, particularly a kind of spindle lowering or hoisting gear of directed beat of vehicle membrane chip air throttle.

Background technique:

Automobile-used air throttle is comprised of valve seat, chamber, front and back, throttle blade, throttle plate pin, float chamber, spindle lowering or hoisting gear.

Spindle lowering or hoisting gear is arranged in air throttle aditus laryngis, its role is to control the oil pump capacity of float chamber main nozzle, makes it with the air that enters aditus laryngis by different proportion atomization.Spindle lowering or hoisting gear is comprised of negative pressure chamber, plunger, recoil press spring, spindle fixing frame, spindle mat, spindle.Plunger cylindrical is step body shape, plunger slides up and down in air throttle plunger hole, its top cylindrical is provided with middle groove, a diaphragm inner circle is jumped the queue in this middle groove, limit, diaphragm outer is overlayed on valve seat by body cap, its top lower surface can push up and be attached to edge on sliding eye, between body cap and plunger endoporus, forms negative pressure chamber, and negative pressure chamber is communicated with the negative tube that engine operation produces negative pressure by pipeline.It is poroid that plunger inner circle is Pyatyi step, and top, recoil press spring two ends is attached on body cap and two stage steps hole interior edge face.On three grades of step hole inner round wall upper ends, extend and three arc boss possessing spacing with bottom surface, hole for to spindle fixing frame gear, spindle fixing frame cylindrical is step column, the post cylindrical of getting out of a predicament or an embarrassing situation is provided with three arc grooves for from three arc boss outers of plunger are passed, then rotates 60 degree and make its non-groove part position be blocked in three arc boss below cannot upwards to move; And three arc concave stations of the upper surface setting at the non-groove of spindle fixing frame position are enclosed within three the arc boss outer upper limit liquefaction pin fixing frames rotations when upwards press on top.In plunger level Four step hole, place the spindle mat of a sleeve-like, the tapered column of spindle hypomere, middle part are two pitch circle bar shapes, upper cylinder is provided with a plurality of screens circular grooves.The moving engage sleeves of lower cylindrical body at spindle middle part is in the oil outlet of main nozzle top, and the upper cylindrical body Spielpassung at spindle middle part is enclosed within the Pyatyi step hole of plunger.A shaft block ring screens is linked in a screens circular groove of spindle upper cylinder, the spindle mat that is linked in spindle cylindrical is pressed on the lower end surface of plunger level Four step hole, a small pressure spring is linked in spindle upper cylinder cylindrical and spindle fixing frame bottom inner circle, top, small pressure spring two ends is attached between shaft block ring and spindle fixing frame, implements the flexibility of spindle and spindle mat and fixes.

When negative pressure chamber produces negative pressure, plunger overcomes the recoil press spring lifting that makes progress, plunger level Four step hole interior edge face holds up spindle mat and drives spindle lifting by shaft block ring, negative pressure along with engine operation generation, the throttle blade of air throttle is opened, plunger lifting, also can make atomization gas and air from taking out of because of negative pressure between spindle and main nozzle carry out abundant atomization while also making spindle lifting, enter motor and carry out burning work.Plunger rises highlyer, and the gap between the large step hole of spindle taper pin post and pintle valve seat top is just larger, and float chamber oil pump capacity is larger.

The defect of this structure is: because accuracy of manufacturing does not reach, the total backlash error that gap between gap between moving matching gap between plunger cylindrical and plunger hole, spindle fixing frame and three grades of step holes of plunger, the upper cylindrical body in spindle middle part and elevating bracket Pyatyi step hole forms makes spindle shaft axis beat direction in nondeterministic statement, be that shaft axis exists irregular beat, there is beat amount in the taper pin post of spindle bottom.Accuracy of manufacturing can not improve, and precision has improved that installation difficulty is large, so require to have certain total backlash error, this is also that spindle adopts the fixing design philosophy of flexibility with spindle mat, shaft block ring.The free cross-section that the large step hole in this spindle beat amount and main nozzle top forms exists section area poor, and because this cross section is original just very little, small beat amount also can produce the deviation of oil mass.Secondly, the beat of spindle makes its dimensional orientation in aditus laryngis of the naked section between plane and plunger lower plane on main nozzle also have small addendum modification, the turbulent flow that the irregular addendum modification of beat direction, dimensional orientation produces while also causing air draught through naked section is also different, and different turbulent flows causes again different resistance of air, different air flow rates.Thereby produce the atomizing effect of micro-variable, micro-variable of air flow rate, atomization quantity, causes and produces in use actual unstable in each fuel-displaced some oil pump capacity of same batch of air throttle.

Summary of the invention:

The object of the invention is to overcome above-mentioned defect, a kind of spindle lowering or hoisting gear of directed beat of vehicle membrane chip air throttle is provided.

The present invention program is: comprise negative pressure chamber, plunger, recoil press spring, spindle fixing frame, spindle mat, packing ring, spindle composition for axle, it is characterized in that: it is planar that the bottom surface, level Four step hole hole of plunger is step, the terrace of appearing on the stage is little flat-cut bow shaped surface, leave from office terrace is large flat-cut bow shaped surface, its flat-cut limit mid-chord of little flat-cut bow shaped surface of terrace and the level Four step hole shaft axis spacing of plunger of appearing on the stage is greater than plunger Pyatyi step hole radius, is less than spindle mat 5 exradius, and leave from office terrace is 0.5mm with the terrace drop of appearing on the stage.

The invention has the advantages that: appear on the stage terrace top of plunger level Four step hole is attached to a side of spindle mat, to make spindle beat direction be spindle bottom all the time towards level Four step hole lower space avris corresponding to face of topping bar, the spindle beat orientation air turbulence that spindle causes is relatively stable, improve to produce the air throttle of same specification with respect to the stability of stable, the atomization quantity of oil pump capacity, become car discharge stable, meet country about the requirement of vehicle tail gas discharge.

Accompanying drawing explanation:

Fig. 1 is structural representation of the present invention.

Fig. 2 is the K enlarged view of Fig. 1.

Fig. 3 is the A-A sectional view of Fig. 2.

Embodiment:

Structure of the present invention comprises negative pressure chamber 2, plunger 1, recoil press spring 3, spindle fixing frame 4, spindle mat 5, for axle, packing ring 8, spindle 6 form, it is characterized in that: it is planar that the bottom surface, level Four step hole hole of plunger 1 is step, the terrace of appearing on the stage is little flat-cut bow shaped surface, leave from office terrace 7 is large flat-cut bow shaped surface, its flat-cut limit mid-chord of little flat-cut bow shaped surface of terrace and the level Four step hole shaft axis spacing of plunger 1 of appearing on the stage is greater than plunger 1 Pyatyi step hole radius, is less than spindle mat 5 exradius, and leave from office terrace 7 is 0.5mm with the terrace drop of appearing on the stage.

The level Four step hole of plunger 1 tangent line of little its string of a musical instrument of flat-cut bow shaped surface in the plunger Pyatyi step hole outside of topping bar, its inner side in spindle mat cylindrical, outer arc limit.

During plunger 1 lifting, its level Four step hole terrace of only appearing on the stage partly contacts with spindle mat 5 one sides, spindle mat 5 opposite sides above leave from office terrace 7 because of unsettled generation pre-tilt, or spindle mat 5 opposite sides directly ride over and are tilting shape on leave from office terrace 10, spindle mat 5 uses packing ring 8 to transmit one-sided inclination lift by axle, spindle 6 lifting under power effect on one-sided being tilted to all the time, unbalancedly one-sidedly to climbing power, make spindle 6 to a side, produce directed beat all the time, air turbulence is relatively stable.

Claims (1)

1. the spindle lowering or hoisting gear of the directed beat of a vehicle membrane chip air throttle, comprise negative pressure chamber (2), plunger (1), recoil press spring (3), spindle fixing frame (4), spindle mat (5), packing ring for axle (8), spindle (6) forms, it is characterized in that: it is planar that the bottom surface, level Four step hole hole of plunger (1) is step, the terrace of appearing on the stage is little flat-cut bow shaped surface, leave from office terrace (7) is large flat-cut bow shaped surface, its flat-cut limit mid-chord of little flat-cut bow shaped surface of terrace and the level Four step hole shaft axis spacing of plunger (1) of appearing on the stage is greater than plunger (1) Pyatyi step hole radius, be less than spindle mat (5) exradius, leave from office terrace (7) is 0.5mm with the terrace drop of appearing on the stage.

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