CN203009291U - Power-assisted steering pump capable of regulating flow along with speed - Google Patents
Power-assisted steering pump capable of regulating flow along with speed Download PDFInfo
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- CN203009291U CN203009291U CN 201220732147 CN201220732147U CN203009291U CN 203009291 U CN203009291 U CN 203009291U CN 201220732147 CN201220732147 CN 201220732147 CN 201220732147 U CN201220732147 U CN 201220732147U CN 203009291 U CN203009291 U CN 203009291U
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- steering pump
- slide valve
- guiding valve
- flow
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Abstract
The utility model relates to a power-assisted steering pump capable of regulating flow along with speed. The power-assisted steering pump comprises a slide valve component in a slide valve cavity communicated with a high pressure oil channel, wherein the slide valve component mainly comprises a slide valve, a valve sleeve, a slide valve adjustment lever, a spring and a valve port plug screw, the valve sleeve and the wall of the slide valve are in interference fit, the front end of the valve sleeve is provided with an oil outlet, the rear end of the valve sleeve is provided with an orifice, the slide valve adjustment lever penetrates through the orifice so as to stretch into the valve sleeve, the rear end of the slide valve adjustment lever is arranged at the front end of the slide valve, the part of the slide valve adjustment lever, close to the slide valve, is a cylinder, the part of the slide valve adjustment lever far, away from the slide valve, is a reversed cone, the rear end of the slide valve is provided with a spring, a valve port cavity is formed between the valve sleeve and the slide valve, and the rear end of the spring is contacted with the bottom wall of the valve port plug screw which is connected with a steering pump shell. When the engine revolution speed rises, the flow output of the steering pump is reduced along with the speed and is increased when the engine revolution speed descends. According to the power-assisted steering pump, the stability, the safety and the comfort of a vehicle in driving are enhanced; in addition, the power consumption of an engine in driving of the steering pump is reduced, so that the power-assisted steering pump is beneficial to energy conservation and environment protection.
Description
Technical field
The utility model belongs to a kind of auto steerer, particularly a kind of steering pump of automobile.
Background technique
Power-assisted steering pump is as the heart component of steering system, and its performance realizes that to vehicle safety, comfortable turning to have vital effect, wherein the output flow characteristic characteristic index of a key especially.In automobile steering system, especially the commercial car steering system, because car load is large, need installation high-voltage power, the travelling comfort when the hydraulic power-assisted steering pump of flow turns to improve the driver greatly; Simultaneously, wish that again steering pump has different performances under different operating modes, as turn or during reversing our desired directions dish light, more flexibly, easy operating; And our desired directions dish is heavy, more surely when highway driving, the Security when being easy to keep straight-line travelling etc. to turn to raising.But in general range, the commercial car such as lorry increase with the output flow of power-assisted steering pump the trend that presents a kind of increase with rotating speed at present.Cause so a kind of defective to be exactly, along with the raising of the speed of a motor vehicle, engine speed improves, and the output flow of steering pump is corresponding raising also, and vice versa.The consequence of bringing thus is that the faster steering wheel of the speed of a motor vehicle is lighter, the easy ovdersteering of vehicle, and sideslip out of control affects traffic safety; The slower steering wheel of the speed of a motor vehicle is heavier, and steering wheel is heavy when turning is especially moveed backward, and also is unfavorable for driving.
Summary of the invention
The purpose of this utility model is to provide a kind of flow with the adjustable power-assisted steering pump of speed, and especially commercial car field flow is with the adjustable power-assisted steering pump of speed.
The technical solution that realizes the utility model purpose is:
A kind of flow is with the adjustable power-assisted steering pump of speed, its main parts size comprises housing, bearing, axle, Simmer ring, minute food tray, stator, blade, rotor, end cap, also comprise the slide valve assembly that is arranged in the piston chamber that communicates with high-pressure oil passage and flow-off, slide valve assembly mainly is comprised of guiding valve, valve pocket, guiding valve adjustable lever, spring, valve opening plug screw; Valve pocket and piston chamber wall interference fit, valve pocket is cylindrical body, and the middle part arranges circular groove, in the face of high-pressure oil passage one side arranges the oil duct tangent plane, back to high-pressure oil passage one side, lower oil duct tangent plane is set, this time oil duct tangent plane is from restriction one end-grain cutting of valve pocket to circular groove.Its front end sets out hydraulic fluid port, and the rear end arranges throttle orifice; The guiding valve adjustable lever passes throttle orifice and stretches in valve pocket, and guiding valve adjustable lever rear end is arranged on the guiding valve front end, and the guiding valve adjustable lever is cylindrical body near the part of guiding valve, is inverted cone away from the part of guiding valve; Guiding valve rear end linking springs, formation valve opening chamber between valve pocket and guiding valve; Spring rear end contact valve opening plug screw diapire, the valve opening plug screw is connected in the steering pump housing.
Working principle of the present utility model is:
When high pressure oil enters into piston chamber from the high-pressure oil duct of the pump housing, then the oil duct on the valve pocket, enter the asphalt channel that the throttle orifice by guiding valve adjustable lever and valve pocket is combined into.High-pressure oil flow is after this passage, and by the oil duct arrival steering pump oil outlet place of valve pocket inside, a part of unnecessary high pressure oil by promoting guiding valve, is got back to again the filler opening of pump chamber to most of high pressure oil from overflow hole in addition again.
High pressure oil enters into the valve opening chamber between valve pocket and guiding valve, when the steering pump rotating speed raises, pressure in the valve opening chamber can increase, thereby guiding valve is moved together with the resistance that the guiding valve adjustable lever overcomes spring, make on the one hand the sectional area between the throttle orifice of guiding valve adjustable lever and valve pocket change and flow is changed, make on the one hand in addition unnecessary high pressure oil get back to again pump chamber interior filler opening place.The diameter of each section of the tapering angle [alpha] by changing the guiding valve adjustable lever and length, change guiding valve adjustable lever can be realized form and the trend of various flow value and decline.
The present invention compared with prior art, its remarkable advantage:
1, can realize that output flow directly descends and the form of two kinds of variable-flows of ladder decline, satisfy different clients' demand;
2, can not change installation dimension on the basis of existing arbitrary money steering pump, do not change the pipeline link position and size realizes the present invention;
3, stability, Security and travelling comfort, the energy-conserving and environment-protective of vehicle drive have been improved.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is guiding valve, the valve pocket schematic diagram of capable of regulating flow quantity;
Fig. 3 a is the valve pocket schematic diagram relevant with Flow-rate adjustment;
Fig. 3 b is the valve pocket partial cross section schematic diagram relevant with Flow-rate adjustment
Fig. 4 is the guiding valve size schematic diagram relevant with Flow-rate adjustment;
Fig. 5 is the rotating speed-flow curve schematic diagram of prior art;
Fig. 6 a is rotating speed-flow curve of the present invention (directly descending) schematic diagram;
Fig. 6 b is rotating speed-flow curve of the present invention (ladder decline) schematic diagram;
Fig. 7 is that embodiment one rotating speed-flow curve is regulated embodiment and enumerated schematic diagram;
Fig. 8 is that embodiment two rotating speed-flow curve is regulated embodiment and enumerated schematic diagram;
Fig. 9 is that embodiment three rotating speed-flow curve is regulated embodiment and enumerated schematic diagram;
Figure 10 is that embodiment four rotating speed-flow curve is regulated embodiment and enumerated schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
In conjunction with Fig. 1 and Fig. 2, a kind of flow is with the adjustable power-assisted steering pump of speed, its main parts size comprises housing, bearing, axle, Simmer ring, minute food tray, stator, blade, rotor, end cap, also comprise the slide valve assembly that is arranged in the piston chamber 7 that communicates with high-pressure oil passage 10 and flow-off 11, slide valve assembly mainly is comprised of cylindrical body guiding valve 1, cylindrical valve pocket 2, guiding valve adjustable lever 3, spring 4, valve opening plug screw 5; Valve pocket 2 and piston chamber 7 wall interference fit, its front end sets out hydraulic fluid port 6, and the rear end arranges throttle orifice 9, throttle orifice 9 internal diameters are less than valve pocket 2 internal diameters, oil outlet 6 is fortunately different according to pump, can be arranged on the sidewall of valve pocket 2 front ends, also can be arranged on the diapire of valve pocket 2 front ends; Guiding valve 1 can slide in piston chamber 7, thus the switch of controlling water kick mouth 11, guiding valve 1 front end arranges guiding valve adjustable lever 3, and guiding valve 1 and guiding valve adjustable lever 3 are one-body molded, and spring 4 is sleeved on the plane of afterbody of guiding valve; Guiding valve adjustable lever 3 front ends become cylindrical body, the middle part becomes vertebral body, the rear end becomes cylindrical body, guiding valve adjustable lever 3 rear ends are arranged on guiding valve 1 front end, and greater than the cross section diameter of a circle of rear end cylindrical body perpendicular to axis, guiding valve adjustable lever 3 stretches in valve pocket 2 by the throttle orifice 9 of valve pocket 2 the nose circle cylinder perpendicular to the cross section diameter of a circle of axis; Formation valve opening chamber 8 between valve pocket 2 and guiding valve 1; The rear end in contact valve opening of spring 4 plug screw 5 diapires, valve opening plug screw 5 outer walls are provided with screw thread, and the inwall at piston chamber 7 spring 4 places is provided with screw thread, and valve opening plug screw 5 is threadedly connected to the steering pump housing.
In conjunction with Fig. 3, valve pocket 2 is cylindrical body, the periphery middle part arranges circular groove 13, in the face of high-pressure oil passage 10 1 sides cut out oil duct tangent plane 12, upward oil duct tangent plane 12 is from throttle orifice 9 one end-grain cutting of valve pocket 2 to the corresponding part of valve pocket 2 with high-pressure oil passage 10, valve pocket 2 arranges lower oil duct tangent plane 14 back to high-pressure oil passage 10 1 sides, this time oil duct tangent plane 14 is from throttle orifice 9 one end-grain cutting of valve pocket 2 to circular groove 13, and throttle orifice 9 places of valve pocket 2 are perpendicular to the asphalt channel 15 that arranges on the outer wall of valve pocket (2) axis radially.Oil duct tangent plane on valve pocket 2 can be for a plurality of.
High pressure oil in high-pressure oil passage 10 flows into piston chamber 7, flow through passage between upper oil duct tangent plane and piston chamber 7 walls, simultaneously through flow through passage between lower oil duct tangent plane and piston chamber 7 walls of circular groove, flow into asphalt channel 15, part high pressure oil flows to oil outlet 6 by throttle orifice 9, a part acts on guiding valve 1, promotes guiding valve 1 motion, finally flow back into filler opening in pump chamber from flow-off 11.
In conjunction with Fig. 4, flow is with the guiding valve 1 and guiding valve adjustable lever 3 of the adjustable power-assisted steering pump of speed, and guiding valve adjustable lever 3 rear ends are cylindrical body, and its length is L, and the circular diameter of its cross section perpendicular to axis is D1; Middle part inverted cone, tapering angle are that α gets 0 to 180 degree; Guiding valve adjustable lever 3 nose circle cylinders are D2 perpendicular to the circular diameter of the cross section of axis.As L, D1, when D2 is certain fixed value, the α angle is larger, and the cone surface which area of the back taper section of guiding valve adjustable lever is less, and it is also faster that the sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 changes; As L, D1, when α is certain fixed value, D2 is larger, and the sectional area between the throttle orifice of guiding valve adjustable lever head and valve pocket is less, otherwise, larger; As L, D2, when α is fixed value, D1 is larger, and the sectional area between the throttle orifice of guiding valve adjustable lever rear end and valve pocket is less, otherwise, larger.Wherein, L, D1, D2 are according to the difference of steering pump and parameter is different.
In conjunction with Fig. 5, the structure of the flow control of existing power assistance pump for steering part is that guiding valve is not with adjustable lever, also there is no the valve pocket structure simultaneously.Its working principle is: along with the raising (when not reaching N1) of rotating speed, high pressure oil all flows out from delivery outlet, and flow increases gradually; When rotating speed reached N1, when high pressure oil flowed out from delivery outlet, a part of fluid began to get back to again the pump chamber filler opening from flow-off; , further promote with rotating speed during greater than N1 when rotating speed, when the high pressure oil flow further increased, more fluid was got back to the pump chamber filler opening from flow-off, and its oil outlet output flow-speed curves is the trend that slightly raises.
in conjunction with Fig. 6 a, flow of the present invention is with the adjustable power-assisted steering pump of speed, along with the oil hydraulic pump rotating speed improves, the flow of high pressure oil also improves thereupon, high pressure oil increases gradually to the pressure of guiding valve 1, promoting guiding valve 1 moves, Compress Spring 4, the rear end barrel portion of guiding valve adjustable lever 3 moves in throttle orifice under the drive of guiding valve 1 at this moment, sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 does not change, all fluid export the oil outlet 6 of valve pocket 2 to from the valve opening chamber, high pressure oil reaches oil outlet 6 by throttle orifice flow increases with the rotating speed raising, therefore the linear variation of flow-rotating speed, its slope is relevant with the discharge capacity of steering pump rotor, when rotating speed reaches N1, the middle part inverted cone of guiding valve adjustable lever 3 moves to the throttle orifice place, and flow-off 11 is opened, and a part of fluid is got back to the pump chamber filler opening from flow-off, and this moment, the fluid output flow was Q1, along with the rising of rotating speed during greater than N1, high pressure oil continues to guiding valve 1 pressure, the back taper section of guiding valve adjustable lever 3 begins to move in throttle orifice, sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 reduces gradually, high pressure oil reduces by the flow that throttle orifice reaches oil outlet 6, more fluid is got back to the pump chamber filler opening from flow-off, and the fluid output quantity is reduced, thereby realizes the target that the output flow of fluid raises and reduces with pump speed, when rotating speed continued to improve, guiding valve adjustable lever 3 nose circle cylinders moved to throttle orifice, and the sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 does not change, thereby made the fluid output flow keep a steady state value.
In conjunction with Fig. 6 b, itself and Fig. 6 a difference be when rotating speed is increased to N1, and flow-speed curves is a steady state value Q1, and when rotating speed was increased to N2, flow-speed curves began to descend.Difference is because the value of L is different, when rotating speed reaches between N1 and N2, flow-off is opened, part fluid is got back to the pump chamber filler opening from flow-off, and the rear end barrel portion of guiding valve adjustable lever 3 moves in throttle orifice under the drive of guiding valve 1, sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 does not change, and therefore, the flow-speed curves of oil outlet is a steady state value Q2.When rotating speed continued to be increased to N3, guiding valve adjustable lever 3 nose circle cylinders moved to throttle orifice, and the sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 does not change, thereby made the fluid output flow keep a steady state value Q2.
Embodiment one
In conjunction with Fig. 7, the value of flow Q1 is relevant with the value of D1, and when D1 is less, the Q1 value is larger; The value of Q2 is relevant with the value of D2, and when D2 is less, the Q2 value is larger; There is certain relation the rotating speed position of flow ascent stage turning point (be flow-off open rotating speed) with the L value, and L is larger, and rotating speed corresponding to turning point place is higher.
When L, D1, D2 are certain fixed value, angle [alpha] is 8 degree, when 15 degree and 180 are spent, compares, and the descending slope of its flow-speed curves ladder section intermediate portion is different.As can be seen from Figure 6, when α is 8 when spending, along with the rising of rotating speed, guiding valve adjustable lever 3 middle part inverted cones are slower by the speed of the throttle orifice of valve pocket 2, the sectional area variation between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 also slower, and the slope of decline is also less; When α is 15 when spending, along with the rising of rotating speed, guiding valve adjustable lever 3 middle part inverted cones are accelerated by the speed of the throttle orifice of valve pocket 2, the sectional area variation between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 also very fast, and the slope of decline is also larger; When α is 180 when spending, along with the rising of rotating speed, guiding valve adjustable lever 3 middle part inverted cones are faster by the speed of the throttle orifice of valve pocket 2, and the sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 is undergone mutation, and slope linearly descends.
Embodiment two
In conjunction with Fig. 8, when D1, D2, angle [alpha] are certain fixed value, when the length L at adjustable lever 3 positions of guiding valve 1 is 7mm and 9mm, compare, the descending slope initial position of its flow-speed curves ladder section intermediate portion is different.As can be seen from Figure 8, when α was 7mm, along with the rising of rotating speed, guiding valve adjustable lever 3 middle part inverted cones were less by the length of the throttle orifice of valve pocket 2, the time that sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 changes is also shorter, and the slope initial position that therefore descends is also forward; When α is 9mm, rising along with rotating speed, guiding valve adjustable lever 3 middle part inverted cones are larger by the length of the throttle orifice of valve pocket 2, and the time that the sectional area between the throttle orifice of guiding valve adjustable lever 3 and valve pocket 2 changes is also longer, after the slope initial position that therefore descends is also leaned on.
Embodiment three
In conjunction with Fig. 9, when L, D2, angle [alpha] are certain fixed value, when D1 is 4.3mm and 4.5mm, compare, the turning point position at its flow-speed curves ladder section top is different.As can be seen from Figure 9, when D1 was 4.5mm, the sectional area when the sectional area ratio D1 between the throttle orifice of its guiding valve adjustable lever 3 and valve pocket 2 is 4.3mm was little, so the flow Q1 of the hydraulic fluid flow rate Q3 that passes through when being 4.5mm of D1 when also being 4.3mm than D1 is little.
Embodiment four
In conjunction with Figure 10, when L, D1, angle [alpha] are certain fixed value, when D2 is 5.3mm and 5.5mm, compare, the turning point position of its flow-speed curves ladder section lower curtate is different.As can be seen from Figure 10, when D2 was 5.5mm, the sectional area when the sectional area ratio D2 between the throttle orifice of its guiding valve adjustable lever 3 and valve pocket 2 is 5.3mm was little, so the flow Q1 of the hydraulic fluid flow rate Q3 that passes through when being 5.5mm of D2 when also being 5.3mm than D1 is little.
Those skilled in the art can be easy to provide similarly other flow-speed curves according to the instruction of above-described embodiment.
Although describe some embodiments of the present invention here with reference to the accompanying drawings, should be appreciated that described embodiment is only example, and nonrestrictive.It will be appreciated by those skilled in the art that in the situation that the scope and spirit of the present invention that limit in not deviating from claim and equivalent thereof, can make variation on various forms and details to these examples embodiment.
Claims (5)
1. a flow is with the adjustable power-assisted steering pump of speed, its main parts size comprises housing, bearing, axle, Simmer ring, minute food tray, stator, blade, rotor, end cap, it is characterized in that: also comprise the flow control assembly that is arranged in the piston chamber (7) that communicates with high-pressure oil passage (10) and flow-off (11), flow control assembly mainly is comprised of guiding valve (1), valve pocket (2), guiding valve adjustable lever (3), spring (4), valve opening plug screw (5); Valve pocket (2) and piston chamber (7) wall interference fit, its front end sets out hydraulic fluid port (6), and the rear end arranges throttle orifice (9); Guiding valve adjustable lever (3) passes throttle orifice (9) and stretches in valve pocket (2), guiding valve adjustable lever (3) rear end is arranged on guiding valve (1) front end, guiding valve adjustable lever (3) front end becomes cylindrical body, the middle part becomes inverted cone, the rear end becomes cylindrical body, and the nose circle cylinder perpendicular to the cross section diameter of a circle of axis greater than the cross section diameter of a circle of rear end cylindrical body perpendicular to axis; Guiding valve (1) rear end linking springs (4) forms valve opening chamber (8) between valve pocket (2) and guiding valve (1); Valve opening plug screw (5) is connected in the steering pump housing, end in contact valve opening plug screw (5) inwall after spring (4).
2. flow according to claim 1 with the adjustable power-assisted steering pump of speed, is characterized in that: valve pocket (2) is cylindrical body, in the face of high-pressure oil passage (10) one sides arrange oil duct tangent plane (12).
3. flow according to claim 2 with the adjustable power-assisted steering pump of speed, is characterized in that: in the middle part of valve pocket (2), circular groove (13) is set, back to high-pressure oil passage (9) one sides, lower oil duct tangent plane (14) is set.
4. flow according to claim 3 with the adjustable power-assisted steering pump of speed, is characterized in that: the restriction (10) of valve pocket (2) is located perpendicular to the asphalt channel (15) that arranges on the outer wall of valve pocket (2) axis radially.
5. flow according to claim 1 with the adjustable power-assisted steering pump of speed, is characterized in that: in the middle part of guiding valve adjustable lever (3), the tapering angle of inverted cone is greater than 0 degree, less than or equal to 180 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220732147 CN203009291U (en) | 2012-12-27 | 2012-12-27 | Power-assisted steering pump capable of regulating flow along with speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220732147 CN203009291U (en) | 2012-12-27 | 2012-12-27 | Power-assisted steering pump capable of regulating flow along with speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203009291U true CN203009291U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220732147 Expired - Fee Related CN203009291U (en) | 2012-12-27 | 2012-12-27 | Power-assisted steering pump capable of regulating flow along with speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203009291U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047132A (en) * | 2012-12-27 | 2013-04-17 | 采埃孚转向泵金城（南京）有限公司 | Power-assisted steering pump with adjustable speed-sensitive flow quantity |
-
2012
- 2012-12-27 CN CN 201220732147 patent/CN203009291U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047132A (en) * | 2012-12-27 | 2013-04-17 | 采埃孚转向泵金城（南京）有限公司 | Power-assisted steering pump with adjustable speed-sensitive flow quantity |
| CN103047132B (en) * | 2012-12-27 | 2015-08-26 | 采埃孚转向泵金城（南京）有限公司 | Flow is with the adjustable power-assisted steering pump of speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20151227 |
|
| EXPY | Termination of patent right or utility model |