CN207106610U - A kind of new automobile electric power-assisted steering apparatus - Google Patents
A kind of new automobile electric power-assisted steering apparatus Download PDFInfo
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- CN207106610U CN207106610U CN201720735066.4U CN201720735066U CN207106610U CN 207106610 U CN207106610 U CN 207106610U CN 201720735066 U CN201720735066 U CN 201720735066U CN 207106610 U CN207106610 U CN 207106610U
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Abstract
The utility model discloses a kind of new automobile electric power-assisted steering apparatus, including rack, ball-head tension rod, rack housing and gear, gear is connected with a main shaft assembly being installed in a combined shell, main shaft assembly includes input shaft, output shaft torsion bar, also include motor, worm gear, worm screw, moment of torsion angular transducer and electronic control unit, worm gear is fixed on the periphery of output shaft, worm and worm wheel engage, the drive end of motor is connected with worm screw, moment of torsion angular transducer is arranged between input shaft and output shaft, the output end of moment of torsion angular transducer and the connection of the signal end of the control terminal of motor and electronic control unit.The utility model realizes accurately power-assisted steering control, the characteristic of variable steering power-assisted can easily be obtained, different power-assisted effects is provided with the change of speed, improves the sensitive light safe and reliable and stability feature with being turned to when running at high speed turned to when running at a low speed.
Description
Technical field
It the utility model is related to a kind of new automobile electric power-assisted steering apparatus.
Background technology
Traditional hydraulic power-assist steering system main parts size has oil can, steering pump, oil pipe, steering gear, belt etc..Its
Operation principle is that engine drives the rotation of steering pump main shaft to produce fluid flow and pressure, steering wheel by parts such as belt pulleys
Direction of rotation makes the flow and pressure size of steering gear dividing control valve regulation steering pump input steering gear hydraulic cylinder with angle,
Steering gear drag link is moved left and right, i.e., an assistance force is added in steering, so that automobile tire turns to.
The problem of traditional hydraulic power-assist steering system is present is as follows：
1st, traditional hydraulic power-assist steering system realizes variable steering power-assisted difficulty, i.e., caused power-assisted size can not be with
The raising of speed and change.Steering wheel is very light during running at high speed, and easily occurs turning " unstable " phenomenon during direction, shadow
Safety during high speed traveling is rung, reduces stability and the sense of security that driver manipulates direction during running at high speed.
2nd, traditional hydraulic power-assist steering system is by driving steering pump to produce hydraulic booster, and its operating efficiency exists
70%~80%, mainly due to the flow behavior of transmission liquid, pass through in oil pipe with parts such as steering gear distributing valves elongated, small
Occur certain hydraulic pressure loss during the passage in aperture, decline steering power-assisted efficiency, cause to occur late in steering procedure
Residual effect answers (sensitivity turned to), following feature during steering is declined with returning positive characteristic.
3rd, traditional hydraulic power-assist steering system structure is complex, and assembling is difficult, and the main parts that form have oil can, turned
To oil pump, oil pipe, steering gear, belt etc., wherein steering pump belongs to consumable accessory, and steering pump is very when overlong time is killed in steering
It is easily damaged, service life declines, and ultimately results in steering and loses steering force energy.
4th, traditional hydraulic power-assist steering system is in steering procedure or when steering is killed, the part such as belt, steering pump
Noise during work can occur, influence comfort during driver drives vehicle.
5th, traditional hydraulic power-assist steering system is the fluid pressure into steering pump by the power-conversion of engine section,
It is thus extra to add combustion in spite of turning to partial power that engine output will be lost as long as engine operates
The loss of material, economic performance decline.
6th, the medium leakage and the loss for adding fuel additionally of traditional hydraulic power-assist steering system work, it is right
Environment causes different degrees of pollution.
Utility model content
For above technical problem, the utility model provides a kind of safe and reliable, operation stabilization, lighter new of turning to
Automobile electric power steering (EPS) device.
The utility model is that technical scheme is used by solving its technical problem：
A kind of new automobile electric power-assisted steering apparatus, including rack, the ball-head tension rod for being distributed in rack both ends, rack
Periphery is provided with rack housing, and the middle part of rack is provided with the gear engaged, and gear and one are installed on the master in a combined shell
Axle assembly connects, and the main shaft assembly includes input shaft, output shaft and the torsion bar being connected between input shaft and output shaft, institute
The one end and output shaft for stating gear are fixed, and the automobile electric power steering (EPS) device also includes motor, worm gear, worm screw, moment of torsion angle
Sensor and electronic control unit are spent, worm gear, worm screw and moment of torsion angular transducer are in the combined shell, the snail
Wheel is fixed on the periphery of output shaft, worm and worm wheel engagement, and the drive end of the motor is connected with worm screw, and the moment of torsion angle passes
Sensor is arranged between input shaft and output shaft, the output end of moment of torsion angular transducer and the control terminal of motor and Electronic Control
The signal end connection of unit.
As preferred embodiment, the combined shell is formed by main casing and top cover combination, the worm gear, worm screw with
And moment of torsion angular transducer is in the main casing, the upper lid and the rack housing be respectively placed in the both sides of main casing simultaneously and its
Combination forming, the input shaft are fixed in upper lid by clutch shaft bearing.
As preferred embodiment, the output shaft is fixed in main casing by second bearing, the output shaft
Periphery is installed with the circlip for shaft for limiting second bearing.
As preferred embodiment, two shaft ends of the torsion bar are consolidated by alignment pin and input shaft and output shaft respectively
It is fixed.
As preferred embodiment, one end of the gear is fixed by alignment pin and output shaft.
As preferred embodiment, the worm screw is using the profit axle certainly of the support of one end ball bearing, one end draw ratio more than 1
Set support.
The beneficial effects of the utility model are：The utility model is provided with moment of torsion angular transducer, can be by input shaft and defeated
Caused angular turn displacement becomes electric signal and is transported to electronic control unit between shaft, and electronic control unit is the control of automobile
Core processed, therefore electronic control unit can be further combined with GES, engine rotational speed signal etc., controlled motor is by corresponding
Instruction exports corresponding steering direction and the assisted diversion power torque of power-assisted size.Therefore, the utility model realizes accurately
Power-assisted steering is controlled, and can easily obtain the characteristic of variable steering power-assisted, and different power-assisted effects is provided with the change of speed,
Improve the sensitive light safe and reliable and stability feature with being turned to when running at high speed turned to when running at a low speed.
Brief description of the drawings
It is further detailed with reference to the accompanying drawings and detailed description：
Fig. 1 is overall structure figure of the present utility model；
Fig. 2 is the sectional view of the utility model power-assisted steering part.
Label declaration：1- racks, 2- ball-head tension rods, 3- rack housings, 4- gears, 5- input shafts, 6- output shafts, 7- are turned round
Bar, 8- motors, 9- worm gears, 10- worm screws, 11- moment of torsion angular transducers, 12- electronic control units, 13- main casings, cover on 14-,
15- clutch shaft bearings, 16- second bearings, 17- circlips for shaft.
Embodiment
Below against accompanying drawing, by the description to embodiment, to specific embodiment of the present utility model as involved
Mutual alignment and annexation, the effect of each several part and operation principle, manufacture between the shape of each component, construction, each several part
Technique and operate with method etc., are described in further detail, to help those skilled in the art to of the present utility model
Utility model design, technical scheme have more complete, accurate and deep understanding.
Referring to Figures 1 and 2, electric servo steering device of the present utility model is mainly by traditional mechanical gear tooth
Bar turns to main part and electric power steering part composition.The former mainly include rack 1, ball-head tension rod 2, rack housing 3,
Gear 4, the main shaft assembly being made up of input shaft 5, output shaft 6 and torsion bar 7 etc..The latter includes motor 8, worm gear 9, worm screw 10, torsion
Square angular transducer 11 and electronic control unit 12 etc..
In rack housing 3, main shaft assembly and worm gear 9, worm screw 10 and moment of torsion angular transducer 11 etc. are located at rack 1
In one combined shell.As shown in figure 1, this combined shell is combined by main casing 13 and upper lid 14, worm gear 9, worm screw 10 and
Moment of torsion angular transducer 11 in the main casing 13, upper lid 14 and rack housing 3 be respectively placed in the both sides of main casing 13 and and its
Combination forming, input shaft 5 are fixed in upper lid 14 by clutch shaft bearing 15.Output shaft 6 is fixed on main casing by second bearing 16
In body 13, the periphery of output shaft 6 is installed with the circlip for shaft 17 for limiting second bearing 16.Worm screw 9 uses one end ball
Bearings, one end draw ratio being supported from profit axle sleeve more than 1.
Based on combinations of the above structure, various pieces of the present utility model form modular combination, when in use can root
According to needing to change the parts such as upper lid 14, worm screw 10, worm gear 9, rack housing 3, so as to meet more entrucking demands.
Concrete structure of the present utility model is described below.
As illustrated, ball-head tension rod 2 is distributed in the both ends of rack 1, gear 4 engages with the middle part of rack 1, when 4 turns of gear
It can be turned to when dynamic with the left and right displacement of carry-over bar 1 so as to realize.Therefore by controlling the rotation of gear 4 to can control automobile
Turn to.
One end of gear 4 is fixed with output shaft 6, is fixed specifically by alignment pin and output shaft 6.Torsion bar 7 is connected to defeated
Enter between axle 5 and output shaft 6, specially the two of torsion bar 7 shaft end is fixed by alignment pin and input shaft 5 and output shaft 6 respectively.
Therefore when input shaft 5 rotates output shaft 6 can be driven to rotate.
Worm gear 9 is fixed on the periphery of output shaft 6, and worm screw 10 and worm gear 9 are engaged, and the drive end of motor 8 is connected with worm screw 10,
Moment of torsion angular transducer 11 is arranged between input shaft 5 and output shaft 6, the output end and motor 8 of moment of torsion angular transducer 11
Control terminal be connected with the signal end of electronic control unit 12.The drive end of motor 8 is connected with worm gear reducer, transmission efficiency
Up to more than 90%, the torque of output is set to directly act on steered wheel.There is no the sluggish effect that traditional hydraulic booster system is brought
Should, the trace performance of wheel when improving wheel steering.In the presence of ball-head tension rod 2 and inertia, rotate steered wheel
Shimmy reduction, improve the antijamming capability of external force.Controlled by software programming, increase aligning torque or damping torque, low
After being turned to when fast, steering wheel can return to centre position exactly on demand；After turning in high speed, it can prevent from returning positive process
The impulse oscillation of middle steering wheel, the return performance in direction when improving low speed and running at high speed.
Caused angular turn displacement between input shaft 5 and output shaft 6 can be become telecommunications by moment of torsion angular transducer 11
Number it is transported to electronic control unit 12, electronic control unit 12 is the control core of automobile, therefore electronic control unit 12 can be with
Further combined with GES, engine rotational speed signal etc., controlled motor 8 exports corresponding steering direction and power-assisted by command adapted thereto
The assisted diversion power torque of size.Low speed provides larger power steering when turning to, and turns to human pilot more light, when
When speed improves, power steering caused by automobile electric power steering (EPS) device tapers into, and what human pilot needed when turning to turns
It will be become larger to power, and effectively solve " unstable " phenomenon of traditional hydraulic steering system when turning direction at a high speed, improved
Human pilot manipulates during running at high speed the stability and the sense of security in direction.
The utility model realizes low burn oil consumption, not the power of consumption of engine, is to maintain system to work with power supply,
Only when turning to, motor can just produce power-assisted, not consumed energy when not turning to, therefore, automobile electric power steering (EPS) device is significantly
Reduce the fuel consumption that vehicle uses, than traditional hydraulic power-assist steering system：When not turning to, automobile electric power-assisted steering
Device (EPS) is reduced to 3% or so fuel consumption；During steering, 5% or so fuel consumption is reduced to.
The utility model using power supply come work, ask by the leakage without traditional hydraulic power-assist steering system working media
Topic, avoids pollution on the environment, is that the environment-friendly vehicle of market trend demand carries steering.
The utility model is exemplarily described above in conjunction with accompanying drawing, but is not enumerating for exhaustive, it is clear that this reality
It is not subject to the restrictions described above with new specific implementation, is entered as long as employing methodology and technical scheme of the present utility model
The improvement of capable various unsubstantialities, or it is not improved by it is of the present utility model design and technical scheme directly apply to other fields
Close, within the scope of protection of the utility model.
Claims (6)
1. a kind of new automobile electric power-assisted steering apparatus, including rack, the ball-head tension rod for being distributed in rack both ends, rack it is outer
It is provided with rack housing week, the middle part of rack is provided with the gear engaged, and gear and one are installed on the main shaft in a combined shell
Assembly connects, and the main shaft assembly includes input shaft, output shaft and the torsion bar being connected between input shaft and output shaft, described
One end of gear is fixed with output shaft, it is characterised in that：The automobile electric power steering (EPS) device also includes motor, worm gear, snail
Bar, moment of torsion angular transducer and electronic control unit, worm gear, worm screw and moment of torsion angular transducer are located at the combined shell
Interior, the worm gear is fixed on the periphery of output shaft, and worm and worm wheel engagement, the drive end of the motor is connected with worm screw, described
Moment of torsion angular transducer is arranged between input shaft and output shaft, the output end of moment of torsion angular transducer and the control terminal of motor
It is connected with the signal end of electronic control unit.
A kind of 2. new automobile electric power-assisted steering apparatus according to claim 1, it is characterised in that：The combined shell
Formed by main casing and top cover combination, the worm gear, worm screw and moment of torsion angular transducer in the main casing, the upper lid and
The rack housing is respectively placed in the both sides of main casing and shaping in combination, and the input shaft is fixed on by clutch shaft bearing
In lid.
A kind of 3. new automobile electric power-assisted steering apparatus according to claim 1, it is characterised in that：The output shaft leads to
Cross second bearing to be fixed in main casing, the periphery of the output shaft is installed with to be kept off for limiting the axle of second bearing with elasticity
Circle.
A kind of 4. new automobile electric power-assisted steering apparatus according to claim 1, it is characterised in that：The two of the torsion bar
Individual shaft end is fixed by alignment pin and input shaft and output shaft respectively.
A kind of 5. new automobile electric power-assisted steering apparatus according to claim 1, it is characterised in that：The one of the gear
End is fixed by alignment pin and output shaft.
A kind of 6. new automobile electric power-assisted steering apparatus according to claim 1, it is characterised in that：The worm screw uses
One end ball bearing support, one end draw ratio being supported from profit axle sleeve more than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720735066.4U CN207106610U (en) | 2017-06-22 | 2017-06-22 | A kind of new automobile electric power-assisted steering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720735066.4U CN207106610U (en) | 2017-06-22 | 2017-06-22 | A kind of new automobile electric power-assisted steering apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN207106610U true CN207106610U (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720735066.4U Active CN207106610U (en) | 2017-06-22 | 2017-06-22 | A kind of new automobile electric power-assisted steering apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107226129A (en) * | 2017-06-22 | 2017-10-03 | 安徽德孚转向***股份有限公司 | A kind of new automobile electric power-assisted steering apparatus |
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2017
- 2017-06-22 CN CN201720735066.4U patent/CN207106610U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107226129A (en) * | 2017-06-22 | 2017-10-03 | 安徽德孚转向***股份有限公司 | A kind of new automobile electric power-assisted steering apparatus |
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