CN202243643U - Hydraulic assisting driving steering mechanism for automobile - Google Patents
Hydraulic assisting driving steering mechanism for automobile Download PDFInfo
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- CN202243643U CN202243643U CN2011202806230U CN201120280623U CN202243643U CN 202243643 U CN202243643 U CN 202243643U CN 2011202806230 U CN2011202806230 U CN 2011202806230U CN 201120280623 U CN201120280623 U CN 201120280623U CN 202243643 U CN202243643 U CN 202243643U
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- steering
- active steering
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- piston rod
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Abstract
The utility model discloses a hydraulic assisting driving steering mechanism for an automobile, which comprises a two-stage stretching cylinder with double piston rod and a gear rack mechanism, wherein a driving sheering cylinder serves as a first-stage cylinder with a double-piston rod; an assisting cylinder serves as a second-stage cylinder with double-piston rod; the steering mechanism specifically comprises driving steering cylinder piston rods, a driving steering cylinder barrel, driving steering cylinder pistons, a steering gear, a steering mechanism shell and assisting cylinder piston rods; pistons are arranged at two ends of an outer circle of the driving steering cylinder barrel; a rack which is arranged in the middle section is engaged with a steering gear and is assembled in the steering mechanism shell; two assisting cylinder piston rods are respectively fixed on two sides of the driving steering cylinder barrel and are sleeved on the driving steering cylinder piston rods; and the assisting cylinder is formed by the two assisting cylinder piston rods and the steering mechanism shell. In the utility model, the driving steering cylinder and the assisting cylinder are integrated with each other, a hydraulic system is shared, the structure is simplified and the cost is low.
Description
Technical field
The utility model relates to the motor turning technical field, specifically is meant a kind of automobile hydraulic power-assisted active steering device.
Background technology
The motor turning technology has experienced: traditional mechanical formula steering swivel system, hydraulic power-assist steering system (Hydraulic Power Steering System; Abbreviation HPS system), electric-controlled hydraulic power steering system (Electronic Control Hydraulic Power Steering System; Be called for short the ECHPS system); Develop into electric hydaulic power steering system (the Electro-Hydraulic Power Steering System that is now just applying; Be called for short the EHPS system) and electric boosting steering system (Electric Power Steering System is called for short the EPS system).And the more excellent active front steering system of handling stability and safety performance is present world research focus.Above-mentioned various systems all use in different field at present simultaneously, and on former basis, constantly obtain innovation.
" active steering " is meant: except the steering operation of chaufeur, automobile self also has the function of turning to, and promptly through the adjusting of active to wheel turning angle, improves stability, active safety and the handling comfort of vehicle.Be in particular in: (1) variable ratio steering operation.All the time, the transmitting ratio (ratio of steering wheel angle and steering wheel angle) that motor turning is handled is fixed, but the desirable cornering properties of people's expectation is: transmitting ratio can change along with the difference of the speed of a motor vehicle.When the speed of a motor vehicle is low, get less transmitting ratio, make and handle sensitivity fast, get when the speed of a motor vehicle is higher, make operation stabilization than big speed ratio.(2) pass through the Yaw stability of active steering method control vehicle by force.Up to the present, control vehicle lateral stability mainly be to utilize the longitudinal force control of each tire to realize, electric stabilizing system such as DYC, ESP for example.Utilize the active steering method then more direct effectively.For example under the limiting condition of turning (reaching rollover conditions), can prevent roll-over accident through active steering control.(3) to carrying out ACTIVE CONTROL than the ways face, vehicle situation such as sideslip, whipping, overturning occur easily at sliding road traveling, can in time proofread and correct vehicle through active steering and keep direction.(4) situation of automatically calibrating ovdersteering or understeer.
Active front steering system mainly contains two types: 1. the mechanical type stack turns to; 2. steering-by-wire.
Wire-controlled steering system (Steer by Wire system is called for short the SBW system) basic composition is: bearing circle, return positive motor, and controller turns to drive motor, deflector.Wherein: motor provides back positive rotation moment or applies rotational resistance torque to bearing circle through transmission device; Turn to drive motor to provide the steering torque drive wheels to turn to deflector; Controller with network line with motor, turn to drive motor and various sensor (corner and torque sensor, car speed sensor, steered wheel rotary angle transmitter etc. that comprise bearing circle) to be connected.Principle of work is: controller is made judgement according to the signal of all the sensors, and that calculates that the wheel turning angle that needs and bearing circle need returns positive rotation moment or rotational resistance torque, and the control motor turns to requirement with realization.The advantage of SBW system is: cancelled the mechanical connection between bearing circle and the deflector, it is little to take up space, and is convenient to arrange, ground-surface impacts and also can directly not pass on the hand of driver.Shortcoming is: poor stability, owing to cancelled mechanical connection, (for example outage) driver can't handle and turn to when system breaks down, and causes traffic accident easily.Up to the present wire-controlled steering system does not also get into practical.
Fig. 1 is a kind of active steering system of vehicle that occurs in the market, and it is a kind of mechanical type superposition steering system, has dropped into practicality, and method is bearing circle 1 to be arrived increase an active steering actuating device 2 between the deflector 3, becomes double freedom and drives.Principle of work is: when steering wheel rotation 1, if active steering actuating device 2 is motionless, then identical with common handling maneuver.If bearing circle 1 is motionless, when active steering actuating device 2 drives, press rotating speed and corner driving deflector 3 that active steering drives, when rotating simultaneously, be output as both sums as if bearing circle 1 and active steering actuating device 2, can realize variable ratio output.The advantage of this steering swivel system is: 1., can pin automatically by the active steering control part when breaking down, still can be as common deflector normal running, and safety is good; 2. have inheritance, can on existing deflector basis, increase the active steering drive part.What Bayerische Motorne Werke Aktiengeellschaft adopted is the hybrid drive system of hydraulic power-assisted steering and motor-driven active steering, and the deficiency of this system is: active steering transmission device volume is big, takies than large space, and is influential for the spatial destribution in car; Hydraulic pressure and motor-driven two cover systems and usefulness, cost is high.
Fig. 2 is the another kind of hydraulically powered active front steering system that occurs in the market, and principle of work is: when if oil cylinder 4 is motionless, during steering wheel rotation 1, identical with common steering operation separately.If bearing circle 1 is motionless, oil cylinder 4 promotes deflector 3 separately along slide rail 5 translations, when promotion steering track rod 6 moves, and also can realize wheel steering.When if bearing circle 1 moves with oil cylinder 4 simultaneously, the deflection angle of output wheel is both stacks.The advantage of this steering swivel system is: simple in structure, when the hydraulic pressure active front steering system broke down, oil cylinder was pinned automatically, still can be as common deflector normal running, and safety is good.The deficiency of this system is: the sealing of slide rail is a thin spot, and oil cylinder occupies than large space, is difficult for arranging.
Summary of the invention
The purpose of the utility model is to overcome the shortcoming and defect of above-mentioned prior art, and a kind of simple in structure, cost is low, hydraulic booster and hydraulic pressure active steering integrate automobile hydraulic power-assisted active steering device is provided.
The purpose of the utility model can realize through following technical scheme:
A kind of automobile hydraulic power-assisted active steering device; Comprise active steering piston rod, active steering cylinder tube, active steering oil cylinder piston, steering gear, steering gear housing; Wherein the active steering piston rod has two, is connected in the right ends of active steering oil cylinder piston respectively, and the active steering oil cylinder piston places in the active steering cylinder tube; Every active steering piston rod is provided with oil circuit; Oil circuit is communicated to active steering oil cylinder piston inner chamber respectively by the outer end of active steering piston rod, and the cylindrical of active steering cylinder tube is provided with and steering gear ingear rack rails, and this steering gear, rack rails are encapsulated in the steering gear housing; Said active steering device comprises that also two power-assisted oil cylinder piston bars are fixedly connected on the both sides of active steering cylinder tube respectively and are sleeved on the active steering piston rod active steering cylinder tube and power-assisted oil cylinder piston bar formation power-assisted oil cylinder.
Liquid sealing cooperates between said active steering piston rod and the active steering cylinder tube, and liquid sealing cooperates between said active steering cylinder tube and the steering gear housing.
The hydraulic fluid port of said power-assisted oil cylinder piston bar is positioned at the both sides of steering gear housing.
Said every active steering piston rod is provided with oil circuit, and the entrance of oil circuit is provided with oil inlet.
It specifically is that " zero " shape seal ring is set that said liquid sealing cooperates.
The utility model is compared with prior art, has following advantage and beneficial effect:
(1) cost of this patent active steering oil cylinder is lower than electronic active steering device, and can shared hydraulic efficiency pressure system, has avoided two different systems of use hydraulic booster and electric powered steering.
(2) this patent active steering oil cylinder and deflector integrate, and volume is little, do not exist the outside weak link such as to be lubricated.
(3) the utility model further integrates hydraulic booster and hydraulic pressure active steering on the basis of existing technology, a shared hydraulic efficiency pressure system, and the structural arrangement problem when having solved only with hydraulic-driven has reduced cost.Therefore but the present invention is not an independent active front steering system, in some cases when the needs use is electric boosted, then need use the system of Fig. 3.
(4) the utility model technological means is simple and easy to do, and safe reliability is good, and cost is low, and is easy to utilize.
Description of drawings
Fig. 1 is existing active steering system of vehicle structural principle scheme drawing.
Fig. 2 is existing active steering system of vehicle structural principle scheme drawing.
Fig. 3 is the structural representation of the utility model automobile hydraulic power-assisted active steering device.
Fig. 4 is the A-A generalized section of Fig. 3.
Fig. 5 is the application examples scheme drawing of the utility model automobile hydraulic power-assisted active steering device.
The specific embodiment
In order to understand the technical characterstic of the utility model better, below in conjunction with accompanying drawing this patent is done explanation further, need to prove that the specific embodiment is not the restriction to this patent protection domain.
Like Fig. 3, shown in Figure 4; The utility model automobile hydraulic power-assisted active steering device; Comprise active steering piston rod 7, active steering cylinder tube 8, active steering oil cylinder piston 9, steering gear 10, steering gear housing 11; Wherein active steering piston rod 7 has two, is connected in the right ends of active steering oil cylinder piston 9 respectively, and active steering oil cylinder piston 9 places in the active steering cylinder tube 8; Every active steering piston rod 7 is provided with oil circuit; Oil circuit is communicated to active steering oil cylinder piston 9 inner chambers respectively by the outer end of active steering piston rod 7, and the cylindrical of active steering cylinder tube 8 is provided with and steering gear ingear rack rails, and this steering gear 10, rack rails are encapsulated in the steering gear housing 11; Said active steering device comprises that also two power-assisted oil cylinder piston bars 12 are fixedly connected on the both sides of active steering cylinder tube 8 respectively and are sleeved on the active steering piston rod 7 active steering cylinder tube 8 and power-assisted oil cylinder piston bar 12 formation power-assisted oil cylinders.The hydraulic fluid port 13 of said power-assisted oil cylinder piston bar 12 is positioned at the both sides of steering gear housing 11.Said every active steering piston rod 7 is provided with oil circuit, and the entrance of oil circuit is provided with oil inlet.
The effect of power-assisted oil cylinder also is used to control and change the area of power-assisted oil cylinder chamber except constituting the two-stage oil cylinder, make it close with the chamber area of active steering oil cylinder, satisfies under identical hydraulic system pressure, and power-assisted thrust approaches active steering thrust.If getting the radius of active steering piston rod 7 is R1, the inside radius R2 of active steering cylinder tube 8, the radius of piston rod 12 are R3, and the inside radius of steering gear housing 11 is R4, then need satisfy (R2*R2-R1*R1) >=(R4*R4-R3*R3).
Liquid sealing cooperates between said active steering piston rod 7 and the active steering cylinder tube 8, and liquid sealing cooperates between said active steering cylinder tube 8 and the steering gear housing 11.It specifically is that " zero " shape seal ring is set that said liquid sealing cooperates.
This patent can have following 3 kinds of mode of operations:
(1) if the sealing of the oil circuit of active steering piston rod 7, active steering piston rod 7 with respect to the 8 no relative motions of active steering cylinder tube; Steering wheel rotation drives steering gear 10 separately; Promote the rack rails on the active steering cylinder tube 8; Drive active steering cylinder tube 8 and 7 motions of active steering piston rod; Be common steering operation pattern this moment, and this mode of operation is identical with the general-utility car deflector, and the oil of hydraulic booster gets into hydraulic fluid port 13 and helps 8 motions of promotion active steering cylinder tube to play the power-assisted effect.
(2) if bearing circle is motionless; Be that steering gear 10 is all motionless with active steering cylinder tube 8; Give hydraulic fluid port 14 fuel feeding of a side end of active steering piston rod 7 separately; For example by the hydraulic fluid port oil-feed of left end; Oil gets into and to promote active steering oil cylinder piston 9 in the left chamber of oil cylinder and move to the right with active steering piston rod 7, and this mode of operation is the active steering pattern, generally is used under the emergency state of automobile unstability or artificially handles under the situation not in place automobile automatically through active steering adjusting vehicle condition.
When (3) rotating as if bearing circle; One side of active steering piston rod 7 also simultaneously fuel feeding promote active steering piston rod 7 and move axially with respect to active steering cylinder tube 8; The displacement that the displacement of active steering piston rod 7 at this moment equals active steering cylinder tube 8 adds the displacement of active steering piston rod 7 with respect to active steering cylinder tube 8; This mode of operation generally is used for the operation of motor turning variable ratio, can improve operation comfort.
Fig. 5 has provided an automobile steering system application example, totally comprises: bearing circle 1, hydraulic booster active steering device 3, connecting rod 6, swing arm 18, wheel 19, active steering control cock 16, power steering valve 17, Hydraulic Pump 15 and other hydraulic efficiency pressure system element.
Mode of operation combines Fig. 3～Fig. 5 specific as follows:
If open control cock 16 separately to right or position, a left side; The fluid that oil pump 15 pumps gets into the hydraulic fluid port 14 in right side or left side after control cock 16 is carried out flow regulating; Promote active steering piston rod 7 with the speed of regulating and move to left or move to right, be independent active steering operation this moment.If independent steering wheel rotation 1; Drive booster valve 17 and steering gear 10; Booster valve 17 is at first opened; Fluid helps to drive active steering cylinder tube 8 and also drives active steering piston rod 7, connecting rod 6, swing arm 18, wheel 19 motions through the chamber of hydraulic fluid port 13 entering power-assisted oil cylinders, and be that hydraulic power-assisted steering is operated this moment.If simultaneously steering wheel rotation 1 with open control cock 16, be two kinds of operation synthetic separately this moment, the displacement of active steering piston rod 7 is the stacks of two kinds of operation displacements.
Only used a cover hydraulic efficiency pressure system in this embodiment, structure is greatly simplified.
Just can realize this patent preferably as stated.
Claims (5)
1. automobile hydraulic power-assisted active steering device; It is characterized in that: comprise active steering piston rod, active steering cylinder tube, active steering oil cylinder piston, steering gear, steering gear housing; Wherein the active steering piston rod has two, is connected in the right ends of active steering oil cylinder piston respectively, and the active steering oil cylinder piston places in the active steering cylinder tube; Every active steering piston rod is provided with oil circuit; Oil circuit is communicated to active steering oil cylinder piston inner chamber respectively by the outer end of active steering piston rod, and the cylindrical of active steering cylinder tube is provided with and steering gear ingear rack rails, and this steering gear, rack rails are encapsulated in the steering gear housing; Said active steering device comprises that also two power-assisted oil cylinder piston bars are fixedly connected on the both sides of active steering cylinder tube respectively and are sleeved on the active steering piston rod active steering cylinder tube and power-assisted oil cylinder piston bar formation power-assisted oil cylinder.
2. automobile hydraulic power-assisted active steering device according to claim 1 is characterized in that: liquid sealing cooperates between said active steering piston rod and the active steering cylinder tube, and liquid sealing cooperates between said active steering cylinder tube and the steering gear housing.
3. automobile hydraulic power-assisted active steering device according to claim 2 is characterized in that: the hydraulic fluid port of said power-assisted oil cylinder piston bar is positioned at the both sides of steering gear housing.
4. automobile hydraulic power-assisted active steering device according to claim 3 is characterized in that: said every active steering piston rod is provided with oil circuit, and the entrance of oil circuit is provided with oil inlet.
5. automobile hydraulic power-assisted active steering device according to claim 3 is characterized in that: it specifically is that " zero " shape seal ring is set that said liquid sealing cooperates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202806230U CN202243643U (en) | 2011-08-03 | 2011-08-03 | Hydraulic assisting driving steering mechanism for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202806230U CN202243643U (en) | 2011-08-03 | 2011-08-03 | Hydraulic assisting driving steering mechanism for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202243643U true CN202243643U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202806230U Expired - Fee Related CN202243643U (en) | 2011-08-03 | 2011-08-03 | Hydraulic assisting driving steering mechanism for automobile |
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| Country | Link |
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| CN (1) | CN202243643U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115158452A (en) * | 2022-06-29 | 2022-10-11 | 浙江夏厦精密制造股份有限公司 | Novel steering gear in oil-electricity hybrid vehicle |
-
2011
- 2011-08-03 CN CN2011202806230U patent/CN202243643U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115158452A (en) * | 2022-06-29 | 2022-10-11 | 浙江夏厦精密制造股份有限公司 | Novel steering gear in oil-electricity hybrid vehicle |
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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: 20120530 Termination date: 20140803 |
|
| EXPY | Termination of patent right or utility model |