CN201525408U - Automatic unloading device of automobile power steering gear - Google Patents
Automatic unloading device of automobile power steering gear Download PDFInfo
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- CN201525408U CN201525408U CN2009201210393U CN200920121039U CN201525408U CN 201525408 U CN201525408 U CN 201525408U CN 2009201210393 U CN2009201210393 U CN 2009201210393U CN 200920121039 U CN200920121039 U CN 200920121039U CN 201525408 U CN201525408 U CN 201525408U
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- load
- load valve
- power steering
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Abstract
The utility model relates to an automatic unloading device of an automobile power steering gear. The device comprises a guide rod, a guide sleeve, a sealing nut, a steel ball, an unloading valve body, a spring, a plug and a valve rod, wherein the center of the sealing nut is provided with an open pore; the steel ball is arranged at one side of the open pore and connected with the valve rod through the spring; the unloading valve body is arranged on the plug; the valve rod is installed on the unloading valve body and provided with a protruding top end; the guide sleeve is installed on the guide rod and provided with a lug boss matched with the open pore and the length of the lug boss is greater than the depth of the open pore of the sealing nut; the guide rod and the guide sleeve adopt interference fit; the unloading valve body and the plug adopt interference fit; and the interference pressure between the unloading valve body and the plug is greater than that between the guide rod and the guide sleeve. The automatic unloading device of the automobile power steering gear is simple in structure, lower in cost, convenient for processing and maintenance and can prolong the service life of a steering system.
Description
(1) technical field
The utility model relates to a kind of automobile power steering automatic relief arrangement.
(2) background technology
The present age, automobile steering device adopted the hydraulic power steerig device usually.The deflector of the type is to realize that under hydraulic booster motor turning is light, flexible, quick.But, when being diverted to a left side or right two end positions,, position limiting structure increases because of making the deflector cornering resistance, and the Hydraulic Pump load increases thereupon, easily causes the damage of hydraulic efficiency pressure system as untimely off-load.Multiple automatic deloading technical scheme is disclosed in the prior art.
Chinese patent CN1789056A discloses a kind of built-in type positioning and unloading device for auto power diverter, and it is stifled by valve seat, left unloader valve, oil transportation road, housing, radius stay, left locating bush, rack piston, radial direction oil, right unloader valve, right locating bush, technology plug, threaded column, middle oil, screw arbor assembly, internal oil channel are formed.Described left unloader valve axially is installed on the valve seat, is provided with the radius stay of setting unloaded position on the opposite position of rack piston left side.In addition, right unloader valve is installed axially on the rack piston right side, on housing right-hand member wall opposite position, is provided with the right locating bush of setting unloaded position.When rack piston when the promotion of screw arbor assembly is displaced downwardly to left end or extreme right position, by radius stay or the corresponding spool of right locating bush pushing tow and conducting unloader valve and off-load.It is simple in structure that the present invention locatees relief arrangement, and off-load in time, reliably, thoroughly is particularly suitable for doing medium and heavy built-in type positioning and unloading device for auto power diverter.
China utility model patent CN200964130Y discloses a kind of built in power steering gear of automobile oil pressure off-load structure, and it partly is made of the disjunctor off-load structure and the cavity of resorption unloaded position setting structure two that are located in the rack piston.Two unloader valves that described disjunctor off-load structure is identical by the structure that the rack piston two ends are provided with respectively, the installation site is opposing, and connect radius stay and the limit spring formation that is provided with in the axially extending bore of two unloader valves.Relative and the coaxial line of unloader valve that is provided with on described cavity of resorption unloaded position setting structure and the rack piston, it is by off-load screw rod, packing seal and housing direct connection, and off-load screw rod optical axis end is equipped with the off-load screw rod cover of interference fit.The utility model off-load is simple in structure, off-load is in time reliable, avoids hydraulic efficiency pressure system because of the overload et out of order.The utility model is only applicable to the whole oil pressure dynamic steering device of recirculating ball.
But nearly all there is deficiencies such as adjusting difficulty, inconvenient maintenance in the automatic deloading valve that is applied to now on the automobile.
(3) utility model content
It is a kind of simple in structure that technical problem to be solved in the utility model is to provide, and cost is low, processing, adjustment, automobile power steering automatic relief arrangement easy to maintenance.
A kind of automobile power steering automatic relief arrangement comprises guide rod, guide pin bushing, sealing nut, steel ball, off-load valve body, spring, blanking cover and valve rod composition,
Described sealing nut central authorities are provided with perforate, and steel ball is located at perforate one side, and steel ball is connected with valve rod through spring;
Described off-load valve body is installed on the blanking cover, and valve rod is installed on the off-load valve body and has outstanding top;
Described guide pin bushing is installed on the guide rod, and guide pin bushing is provided with the bossing that cooperates with perforate, protrudes the degree of depth of the length at position greater than the sealing nut perforate;
Described guide rod and guide pin bushing adopt interference fit, and off-load valve body and blanking cover adopt interference fit, and the interference pressure between off-load valve body and blanking cover is greater than the interference pressure between guide rod and guide pin bushing.
Further, also be provided with stabilizer rod in the described off-load valve body.
Further, described off-load valve body is provided with the circlip for shaft that is used for axial location.
Further, the end face of described sealing nut and off-load valve body has the dark 1.5mm in four roads, the oil groove of wide 2mm.
Automobile power steering automatic relief arrangement of the present utility model has following beneficial effect:
1, when wheel forwards near end position, by the off-load of automatic deloading valve, the pressure of steering swivel system is reduced, thereby avoid when wheel forwards end position to, whole steering gear connection is stressed excessive and produce deformation, the life-span of raising steering swivel system; Simultaneously, when the automatic deloading valve can also make wheel forward end position to, the pressure of power steerig pump was unlikely instantaneous too high, thereby avoided the temperature of power steerig pump, pressure constantly to raise and damage power steerig pump.
2, simple in structure, cost is lower, and is easy to process, and leakage of oil point is few.
3, easy to adjust, whole process can realize automatic compensation according to people's will, and does not have the adjustment excess of stroke.
4, easy to maintenance, need not dismantle complete machine, the change part number is few, only needs to change peripheral components and gets final product place in operation, can realize automatic compensation equally after the replacing.
(4) description of drawings
Fig. 1 is the structural representation of automobile power steering.
Fig. 2 is the structural representation of automobile power steering automatic relief arrangement.
(5) specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, but protection domain of the present utility model is not limited to this.
With reference to Fig. 2, a kind of automobile power steering automatic relief arrangement 1, comprise guide rod 2, guide pin bushing 3, sealing nut 4, steel ball 5, off-load valve body 6, spring 8, blanking cover 9 and valve rod 11 compositions, described sealing nut 4 central authorities are provided with perforate, steel ball 5 is located at perforate one side, and steel ball 5 is connected with valve rod 11 through spring 8;
Described off-load valve body 6 is installed on the blanking cover 9, and valve rod 11 is installed on the off-load valve body 6 and has outstanding top;
Described guide pin bushing 3 is installed on the guide rod 2, and guide pin bushing 3 is provided with the bossing that cooperates with perforate, protrudes the degree of depth of the length at position greater than sealing nut 4 perforates;
Described guide rod 2 and guide pin bushing 3 adopt interference fit, and off-load valve body 6 and blanking cover 9 adopt interference fit, and the interference pressure that off-load valve body 6 and blanking cover are 9 is greater than the interference pressure between guide rod and guide pin bushing;
Also be provided with stabilizer rod 7 in the described off-load valve body 6.
Described off-load valve body 6 is provided with the circlip for shaft 10 that is used for axial location.
The end face of described sealing nut 4 and off-load valve body 6 has the dark 1.5mm in four roads, the oil groove of wide 2mm.Fluid was not blocked when oil groove can guarantee that guide rod contacts with the screw rod end face with sealing nut, off-load valve body, can lead to oil.
As shown in Figure 1, chaufeur is when turning to, the rotation of direction of passage dish, drive spool 12, steering screw 13 rotations because steering screw 13 is axially fixed, and and steering nut 14 be to be the worm drive of medium by steel ball, so just drive steering nut 14 side-to-side movements, because the distribution tooth bar, rotate thereby drive rocker shaft 15 on the steering nut 14, the steering drop arm by the periphery of rotatablely moving of rocker shaft 15, straight and horizontal adjusting rod etc. drive wheel steering.According to the layout feature of oil circuit, the sense of motion of steering nut 14 certainly will be consistent with the oil pressure action direction.
The initial condition of the utility model relief arrangement is that off-load valve body and blanking cover directly are pressed onto the position, and the initial corner that guarantees deflector is less than about 8～10 ° of the ultimate angles of vehicle.Because the restriction of off-load valve body inner structure, the gap between each parts is less, so can produce certain throttling action, makes deflector inside still remain with the residual pressure of 3～5MPa.The initial setting corner of this relief arrangement is 31.8 ° on a left side, right 43.5 °.
Left limit is adjusted: when bearing circle turns left, control cock oil circuit is to the left opened, housing 16 left chamber oil-feeds, this moment, steel ball was backed down under the oil liquid pressure effect, break away from the mating surfaces of sealing nut, left chamber fluid flows to the off-load valve body, and valve rod is under the effect of spring and hydraulic pressure, the contact surface closed contact of its circular arc portion and off-load valve body stops left chamber fluid to flow in the chamber to the right.When steering nut continuous cavity direction when motion to the right, valve stem tip contacts with the screw rod end face, and valve rod is headed into the off-load valve body, till screw rod end face and off-load valve body end face contact, deflector this moment begins off-load, but does not arrive the predetermined limit parallactic angle degree of wheel.Apply bigger moment and be rotated further bearing circle on bearing circle, nut continues to the right the chamber motion, be contained on the blanking cover the off-load valve body left cavity direction be pressed into, beat motionlessly up to bearing circle, that is to say the ultimate angle that has arrived set vehicle.Because the valve rod head is exposed at external of unloader valve, screw rod begins to head into the off-load valve body to the valve rod head when wheel will forward end position to, makes left cavity pressure off-load.This moment, the unloaded position adjustment of left-limit corner finished.
Right limit is adjusted: when the bearing circle turning clockwise, control cock oil circuit is to the right opened, the right chamber oil-feed of housing, this moment, valve rod backed down under the oil liquid pressure effect, break away from the mating surfaces of off-load valve body, right chamber fluid flows to the off-load valve body, and steel ball is under the effect of spring and hydraulic pressure, with the contact surface closed contact of sealing nut, stop right chamber fluid to flow in the chamber left.When steering nut continuous cavity direction when motion left, the projection of guide pin bushing enters the aperture of sealing nut, and steel ball is backed down.End face and guide pin bushing end face up to sealing nut contact, and deflector this moment begins off-load, but does not arrive the predetermined limit parallactic angle degree of wheel.On bearing circle, apply bigger moment and be rotated further bearing circle, nut continues chamber motion left, because the diameter of off-load valve body is greater than the guide rod diameter, the interference pressure of off-load valve body and blanking cover is greater than the interference pressure between guide pin bushing and guide rod, therefore, the off-load valve body of having adjusted to the right place will promote guide pin bushing and be pressed into guide rod continuously, beat motionlessly up to bearing circle, that is to say the ultimate angle that has arrived set vehicle.The position is longer than the little hole depth of sealing nut because the guide pin bushing fwd protrudes, and the projection of guide pin bushing backs down steel ball when wheel will forward end position to, makes right cavity pressure off-load, and this moment, the unloaded position adjustment of limit on the right-right-hand limit corner finished.
Setting initial condition according to this relief arrangement, when going to adjust unloaded position as bearing circle elder generation turning clockwise, because the off-load valve body is pressed on the blanking cover end face, it is bigger that right initial corner is established, so, wheel can arrive the end position of vehicle very like a cork, does not at this moment have adjustment, even guide pin bushing is pressed into also just very little a bit of of guide rod.Subsequently, bearing circle turns left, because the initial corner in a left side is less, the requirement of out of reach vehicle corner, certainly will there be adjustment, in subsequent adjustment process, only need just can finish the unloaded position adjustment of both direction according to " left-limit adjustment " recited above and " limit on the right-right-hand limit adjustment " method.
Domestic automatic deloading valve arrangement existence repeatedly just can put in place repeatedly, internal leakage point is many, the leak source that leaks is many, adjust the improper complete machine of must dismantling reinstall many deficiencies such as adjustment, and the positive effect of the relief arrangement of this patent is:
1, adjustment is very convenient, need not train and can adjust exactly limit unloaded position;
2, exist hardly because maloperation produces and adjust improperly problem, even adjust improperly, it is excessive also only may to be that the off-load valve body is adjusted, as produces this situation, only need unload lower guide rod, is selected into housing with the bolt of M16 * 1.5, the off-load valve body is pushed up to put in place get final product;
3, pressed too much such as guide pin bushing because of maloperation, then only need replacing guide rod, guide pin bushing to get final product, very convenient, need not dismantle complete machine;
4, when automobile is changed tie system or positional parameter and changed, adopt this relief arrangement only must change the guide rod guide pin bushing and get final product, need not dismantle and decompose steering assembly;
5, internal leakage point is few. Only there are two leakage points in this relief arrangement, i.e. the sealing of the sealing of steel ball and sealing nut, valve rod and off-load valve body. The sealing at this two place can solve preferably by rational design and processes, can meet design requirement;
6, the dew point that leaks is few. Only there is the dew point that leaks in this relief arrangement, and is more easy to control;
7, valve rod top projective structure can reduce the manufacture difficulty of screw rod, can head into valve body to valve rod easily with the screw rod section; The other end of off-load valve body adopts steel ball sealing, can effectively reduce the length of off-load valve body, also can reduce the protruded length of housing dress guide rod position simultaneously.
Claims (4)
1. automobile power steering automatic relief arrangement is characterized in that:
Described automatic relief arrangement comprises guide rod, guide pin bushing, sealing nut, steel ball, off-load valve body, spring, blanking cover and valve rod composition,
Described sealing nut central authorities are provided with perforate, and steel ball is located at perforate one side, and steel ball is connected with valve rod through spring;
Described off-load valve body is installed on the blanking cover, and valve rod is installed on the off-load valve body and has outstanding top;
Described guide pin bushing is installed on the guide rod, and guide pin bushing is provided with the bossing that cooperates with perforate, protrudes the degree of depth of the length at position greater than the sealing nut perforate;
Described guide rod and guide pin bushing adopt interference fit, and off-load valve body and blanking cover adopt interference fit, and the interference pressure between off-load valve body and blanking cover is greater than the interference pressure between guide pin bushing and guide rod.
2. according to the automobile power steering automatic relief arrangement of claim 1, it is characterized in that: also be provided with stabilizer rod in the described off-load valve body.
3. according to the automobile power steering automatic relief arrangement of claim 1, it is characterized in that: described off-load valve body is provided with the circlip for shaft that is used for axial location.
4. according to the automobile power steering automatic relief arrangement of claim 1, it is characterized in that:
The end face of described sealing nut and off-load valve body has the dark 1.5mm in four roads, the oil groove of wide 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201210393U CN201525408U (en) | 2009-05-27 | 2009-05-27 | Automatic unloading device of automobile power steering gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201210393U CN201525408U (en) | 2009-05-27 | 2009-05-27 | Automatic unloading device of automobile power steering gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201525408U true CN201525408U (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201210393U Expired - Fee Related CN201525408U (en) | 2009-05-27 | 2009-05-27 | Automatic unloading device of automobile power steering gear |
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| Country | Link |
|---|---|
| CN (1) | CN201525408U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575211A (en) * | 2016-01-20 | 2016-05-11 | 合肥同智机电控制技术有限公司 | Steering wheel feedback apparatus |
-
2009
- 2009-05-27 CN CN2009201210393U patent/CN201525408U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575211A (en) * | 2016-01-20 | 2016-05-11 | 合肥同智机电控制技术有限公司 | Steering wheel feedback apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: QUANXING GROUP MANUFACTURING CO., LTD. Free format text: FORMER NAME: ZHEJIANG QUANXING MACHINERY MANUFACTURING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 311835 No. 16, Siu Shan Road, Jiyang street, Zhejiang, Zhuji Patentee after: Quanxing Group Manufacturing Co., Ltd. Address before: 311814, Zhuji Town, Zhejiang City, Doumen Province Industrial Zone Patentee before: Zhejiang Quanxing Machine Manufacturing Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20180527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |