CN100463827C - Automobile electric booster sterring system and its treating method for rotary shaft - Google Patents
Automobile electric booster sterring system and its treating method for rotary shaft Download PDFInfo
- Publication number
- CN100463827C CN100463827C CNB200410089258XA CN200410089258A CN100463827C CN 100463827 C CN100463827 C CN 100463827C CN B200410089258X A CNB200410089258X A CN B200410089258XA CN 200410089258 A CN200410089258 A CN 200410089258A CN 100463827 C CN100463827 C CN 100463827C
- Authority
- CN
- China
- Prior art keywords
- worm
- sliding sleeve
- shaft
- wheel shaft
- worm gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Power Steering Mechanism (AREA)
Abstract
The electric booster steering system for automobile includes rotating shaft comprising worm gear shaft and steering shaft connected together, worm gear, servo motor with output meshed with the worm gear, control module for the servo motor, and rotating shaft position sensor and automobile speed sensor for acquiring signal. It features a sliding sleeve capable of sliding on the rotating worm gear shaft and with outer ring notch, and the position sensor, which is torsion moment sensor with positioning shaft end capable of being connected with the outer ring notch. The rotating shaft may be local HF quenched for raised wear resistance and strength.
Description
Technical field
The present invention relates to a kind of driver assistance mechanism of automobile, relate in particular to the processing method of a kind of automobile electric booster steering system and turning cylinder thereof.
Background technology
From the fifties in last century, General Motors Overseas Corporation has invented since a kind of hydraulic automobile servo steering system, and automobile assisted power steering system is applied to the history of existing five more than ten years on the automobile, and it has solved the problem of motor turning portability.Because hydraulic power-assist steering system has complex structure, fault rate height, easily environment is produced pollutes, occupies big, the defective such as waste energy of interior space, it is progressively replaced by electric boosting steering system.Electric boosting steering system is to adopt control module, the signal that turning cylinder position transduser and automotive speed sensor are sent is analyzed, thereby further the worm gear ingear servomotor that is installed on the Steering gear and on the steering shaft is controlled, make servomotor realize forward or reverse, steering shaft is provided the auxiliary torsion of suitable size, improve drive safety and traveling comfort.Want to make servomotor that auxiliary torsion can be provided in time, exactly, wherein the most important is exactly rotation direction and the rotational angle that the signal that sent of turning cylinder position transduser must reflect turning cylinder truly.
A kind of electric power steering mechanism is disclosed in the Chinese patent 03247079.7, turning cylinder position transduser wherein is the non-contact photoelectric sensor that adopts, this sensor is because of the cost height, make that a whole set of steering hardware price is high, the general assembling that only is applicable to luxury car is unfavorable for being installed on a large scale on the low and middle-grade cars.In addition, because the residing working environment complexity of sensor, the signal that opto-electronic pickup is produced in the course of the work can be subjected to the interference of external factor, must take certain safeguard, so just can make this sensor reflect the mode of operation of bearing circle exactly, thereby make servo steering system that the auxiliary force of suitable size and Orientation is provided.This is the cost of increase sleeve mechanism further, is unfavorable for the market competition of product.
In addition, existing turning cylinder generally is the expensive alloy steel material of price that adopts, and is intensity and the resistance to abrasion between the movable component that improves turning cylinder, often will carry out returning after carburizing and quenching is handled to it again and scald fire in order to remove hairs.Because of it is the integral body of materials and parts to be carried out carburizing and quenching handle its cost of processing height.In addition, the materials and parts through cementation process is crossed for its further fine limit work has brought many inconvenience, have increased difficulty of processing, have reduced work efficiency.
Summary of the invention
For overcoming described defective, the technical issues that need to address of the present invention: a kind of later-model automobile electric booster steering system is provided, and the cost that it can effectively reduce a whole set of automobile electric booster steering system is beneficial on the automobile that is attached to high, medium and low shelves on a large scale.
Another technical matters that the present invention need solve: a kind of processing method to turning cylinder is provided, and it helps reducing production costs, and is convenient to the fine limit work of later process.
Another technical matters that the present invention need solve: the returnability that improves turning cylinder.
For solveing the technical problem, the technical solution adopted in the present invention: a kind of automobile electric booster steering system, comprise by worm-wheel shaft and steering shaft and connect the turning cylinder that forms, be arranged on worm gear, clutch end and worm gear ingear servomotor on the worm-wheel shaft, the control module of control servomotor rotation, be the turning cylinder position transduser and the automotive speed sensor of control module acquired signal, it is characterized in that: on worm-wheel shaft, be provided with in the time of to rotate along with worm-wheel shaft, along the axially movable sliding sleeve of worm-wheel shaft, on the outer peripheral face of sliding sleeve, be provided with groove outside the annular; Described position transduser is a torque sensor, and the end of fix shaft can join with the outer groove of described annular on the described torque sensor.Worm gear on the automobile electric power-assisted steering axle assembly and the worm mesh on the servomotor by the engagement of worm gear and worm screw, are lowered rotating speed, are increased torsion, for turning cylinder provides power-assisted, improve safety and traveling comfort that chaufeur drives a car.The end of fix shaft is provided with a little bearing on the torque sensor, described little bearing is stuck in the outer groove of annular, rotation along with steering shaft, sliding sleeve moves up and down, thereby make the fix shaft on the torque sensor that a deflection angle be arranged, torque sensor is according to the deflection angle of fix shaft, send signal to control module, control module in conjunction with the signal analysis and processing that sends on the speed sensor after, thereby control the rotation direction and the rotating speed of servomotor output shaft, steering shaft is provided the auxiliary force of suitable size and Orientation by the deceleration effort of worm gear and worm screw.Because of what adopt is torque sensor, makes that a whole set of electric boosting steering system is cheap, is adapted to be mounted within on the automobile of low-medium-high level; In addition, torque sensor is strong to working environment adaptability, can carry out the signal output operation well.
As preferably, the inner peripheral surface of described sliding sleeve is provided with at least two annular grooves, and the position of assembling sliding sleeve is provided with spiral groove on the outer peripheral face of worm-wheel shaft, is provided with ball between annular groove and the spiral groove; Be provided with compression spring between described sliding sleeve and the worm gear.When turning cylinder rotated, ball slided in annular groove and spiral groove, thereby drove the upper and lower displacement of sliding sleeve, made the fix shaft on the torque sensor produce skew, thereby produced signal.Adopt the transmission device of ball and sliding sleeve, have transmission sensitivity, signal advantage accurately.
As preferably, described annular groove is two; Described spiral groove is eight; Ball in each annular groove is four, and the ball in the different rings connected in star is divided into four groups, the line at each group ball center and the parallel axes of worm-wheel shaft.To the designing requirement of spiral groove, making can be steady when sliding over upper and lower displacement, is convenient to the true rotation situation to torque sensor reflection turning cylinder, satisfies actual work requirements.
As preferably, described worm gear is made up of two parts, and peripheral part is made by alloy resin, is innerly made by steel material.The peripheral part of worm gear is made by alloy resin, can make the gear teeth be convenient to processing, and its resistance to abrasion, toughness, pull resistance, surface finish are well improved, and long service life, good economy performance.
As preferably, the end of described worm-wheel shaft and steering shaft junction is a spline, and the end of steering shaft is provided with corresponding structure, both free-running fits.This structure is adopted in the joint portion, can make simple in structure, be convenient to the assembling.
As preferably, the end that described steering shaft and worm-wheel shaft connect is provided with outer mouth mask, described outer mouth mask is provided with bayonet socket, and the number of described bayonet socket is identical with ball number in the sliding sleeve downside annular groove, but the ball in the sliding sleeve downside annular groove is lived in described bayonet socket clamping.In the steering shaft rotation process, but bayonet socket Real Time Drive ball move, improved the response sensitivity that sliding sleeve rotates steering shaft.
As preferably, can conduct power mutually between described worm gear and the worm screw.Worm gear and worm screw can be conducted power mutually, and worm screw can drive worm gear and rotate, and worm gear also can drive the worm screw rotation simultaneously, have improved the returnability of turning cylinder like this, have further adapted to actual driving demand.
For the ease of turning cylinder is carried out fine limit work, improve the intensity of the movable connection part of turning cylinder, the plug helix on the worm-wheel shaft carries out electro-high-frequency hardening before grinding handles; On the worm-wheel shaft and steering shaft connection place adopts electro-high-frequency hardening to handle; On the steering shaft and worm-wheel shaft connection place adopts electro-high-frequency hardening to handle.Electro-high-frequency hardening can improve the intensity of target component part, and does not need whole parts are carried out carburizing and quenching, has reduced cost effectively, has improved work efficiency.
As preferably, described worm-wheel shaft and steering shaft are to be made by the 40Cr material.Owing to adopted the local high-frequency quenching, so worm-wheel shaft and steering shaft connection place, and the intensity of the part of the spiral groove on the steering shaft is guaranteed, and do not need the 20CrMTi alloy steel that adopts price relatively costly, helps reducing the manufacturing cost of turning cylinder.
Therefore, beneficial effect of the present invention: since adopted torque sensor and in order to the matching used sliding sleeve of torque sensor, a whole set of steering swivel system is simple in structure, cheap, less demanding to working environment; Adopt the drive mechanism of ball and sliding sleeve, have transmission sensitivity, signal advantage accurately; Spiral groove is that the ball among eight, two of annular grooves, each annular groove is four, make the sliding sleeve transmission stable, and optimized the structure of parts, the line of centers and the worm-wheel shaft parallel axes of each group ball, make the upper and lower displacement of sliding sleeve steady, satisfied the demand of real work; The peripheral part of worm gear is made by alloy resin, can make the gear teeth be convenient to processing, and its resistance to abrasion, toughness, pull resistance, surface finish are well improved, and long service life, good economy performance; Spline structure is adopted in worm-wheel shaft and steering shaft junction, makes simple in structurely, is convenient to assembling; But the bayonet socket Real Time Drive ball of outer mouth mask moves on the steering shaft, has improved the response sensitivity that sliding sleeve rotates steering shaft; Quenching technology is taked in part to turning cylinder, has improved the intensity of movable part, and its resistance to abrasion has also obtained significant raising; Because of having adopted the local high-frequency quenching technical, turning cylinder adopts 40Cr to make, and can effectively reduce material cost, and can satisfy actual work requirements.
Description of drawings
Fig. 1 is the assembling sectional side elevation of turning cylinder assembly;
Fig. 2 is the amplification part sectional view of sliding sleeve;
Fig. 3 is the sectional side elevation of worm gear;
Fig. 4 is the steering shaft partial schematic diagram;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the worm-wheel shaft scheme drawing;
Fig. 7 is the right elevation of Fig. 6;
Fig. 8 is the structural representation of ball in spiral groove;
Fig. 9 is the control principle figure of control module.
The specific embodiment
Automobile electric booster steering system of the present invention is mainly connected the turning cylinder that forms, is arranged on worm gear 2, clutch end and worm gear 2 ingear servomotors 6 on the worm-wheel shaft, the control module of control servomotor 6 rotations, formed by the torque sensor and the automotive speed sensor of control module acquired signal by worm-wheel shaft 1 and steering shaft 5.In conjunction with Fig. 4, Fig. 5, Fig. 7, pass through splined, both free-running fits between worm-wheel shaft 1 and the steering shaft 5.Fig. 1 illustrates, and is provided with worm gear 2 on worm-wheel shaft 1, the worm mesh on itself and servomotor 6 output shafts.Fig. 3 illustrates, and is convenient to processing for the gear teeth that make worm gear 2, and its resistance to abrasion, toughness, pull resistance, surface finish are well improved, and long service life, good economy performance, described worm gear 2 is made up of two parts, and its peripheral part is made by alloy resin, is innerly made by steel material.
Shown in Fig. 1, also be provided with sliding sleeve 3 on worm-wheel shaft, in conjunction with Fig. 2, Fig. 6, described sliding sleeve 3 medial surfaces are provided with two annular grooves 9, and worm-wheel shaft 1 is provided with eight spiral grooves 12, is provided with ball 4 between annular groove 9 and spiral groove 12.Fig. 8 illustrates, and ball 4 is located among the spiral groove 12, and can slide in spiral groove 12.Be provided with four balls 4 in each annular groove 9, ball 4 in two annular grooves 9 can be divided into four groups up and down, for making sliding sleeve 3 reflect the rotation situation of steering shaft 5 exactly, the parallel axes of the line of centres of every group of ball 4 and worm-wheel shaft 1, by determining width between centers between two adjacent in each annular groove 9 balls 4 and the width between centers between two annular grooves 9, trigonometric function value according to acute angle in the right-angled triangle, the anti-angle that pushes away between the axis that obtains spiral groove 12 and worm-wheel shaft 1, thus be prepared into the spiral groove 12 that closes the symbol requirement according to the angle value of gained.Between sliding sleeve 3 and worm gear 2, be provided with a compression spring 7, in order to stablize sliding sleeve 3.Mouth mask 10 outside an end of steering shaft 5 and worm-wheel shaft 1 connection is provided with, described outer mouth mask 10 is provided with bayonet socket 11, the number of ball 4 is corresponding in the annular groove 9 of the number of bayonet socket 11 and sliding sleeve 3 downsides, described bayonet socket 11 blocks the ball 4 in the annular groove 9 of sliding sleeve 3 downsides, moves together in order to drive ball 4 and steering shaft 5.Cooperating between sliding sleeve 3 and the worm-wheel shaft 1 not only is confined to sliding sleeve and ball-type, also can be by being threaded.
Also be provided with the outer groove 8 of annular among Fig. 2 on the outer peripheral face of sliding sleeve 3, the little bearing of torque sensor fix shaft end is stuck in the outer groove 8 of described annular, upper and lower displacement along with sliding sleeve 3, make fix shaft that skew up and down take place, thereby make torque sensor send signal, and then the rotation of control servomotor 6 to control module.
After improving angle of turning cylinder deflection, good returnability can be arranged, by the wheel flank of tooth of worm gear 2 and the three-dimension curved surface of worm tooth helical surface are designed, make worm gear 2 and worm screw can realize transmission each other, prevented from locking phenomenon to occur between worm gear 2 and the worm screw, improved the transmission smoothness between worm gear 2 and the worm screw.
For improving the intensity and the wear resisting property of the movable part on the turning cylinder, generally in the course of processing, all to handle blank.For the turning cylinder that connects with the spline form, its connection part is the processing technology that adopts electro-high-frequency hardening, that is to say, worm-wheel shaft 1 is connected the collar extension platform of end and internal orifice platform that steering shaft 5 connects ends carry out the high frequency processing of quenching, in the hope of increasing intensity and resistance to abrasion herein, the service life of improving associated components; For the spiral groove 12 that is located on the worm-wheel shaft, also carry out electro-high-frequency hardening.Electro-high-frequency hardening is compared to carburizing quenching process, because of it is the Local treatment that adopts, can effectively reduce processing cost, and can improve work efficiency, the hardness of the spiral groove 12 after the processing is identical with the hardness of ball 4, has improved the resistance to abrasion between spiral groove 12 and the ball 4.Because of having adopted quenching technology, the material of worm-wheel shaft 1 and steering shaft 5 can adopt the 40Cr material, is compared to the existing 20CrMTi alloy steel that adopts, and its manufacturing cost can be reduced significantly.
Fig. 9 shows the control overall process of control module to servomotor, after control module is carried out comprehensive analysis processing according to the signal that torque sensor and car speed sensor spread out of, produces the target working current, and then the rotation direction and the rotating speed of control servomotor.
Claims (3)
1. automobile electric booster steering system, comprise by worm-wheel shaft and steering shaft and connect the turning cylinder that forms, be arranged on worm gear, clutch end and described worm gear ingear servomotor on the worm-wheel shaft, the control module of control servomotor rotation, be the turning cylinder position transduser and the automotive speed sensor of control module acquired signal, it is characterized in that: on worm-wheel shaft (1), be provided with in the time of to rotate along with worm-wheel shaft (1), along the axially movable sliding sleeve of worm-wheel shaft (1) (3), on the outer peripheral face of sliding sleeve (3), be provided with groove (8) outside the annular; Described position transduser is a torque sensor, and the outer groove (8) of the end of fix shaft and described annular joins on the described torque sensor; The end of fix shaft is provided with a little bearing on the above-mentioned torque sensor, and described little bearing is stuck in the outer groove of annular (8); The inner peripheral surface of sliding sleeve (3) is provided with at least two annular grooves (9), the position of assembling sliding sleeve (3) on the outer peripheral face of worm-wheel shaft (1) is provided with spiral groove (12), is provided with ball (4) between described at least two annular grooves (9) and the spiral groove (12); Be provided with compression spring (7) between described sliding sleeve (3) and the worm gear (2); Described worm gear (2) is made up of two parts, and peripheral part is made by alloy resin, and inside is made by steel material; Described worm-wheel shaft (1) is a spline with the end of steering shaft (5) junction, the end of steering shaft (5) is provided with corresponding structure, both free-running fits, and outside the end that both connect is provided with mouth mask (10), described outer mouth mask (10) is provided with bayonet socket (11), the number of described bayonet socket (11) is identical with ball (4) number in sliding sleeve (3) the downside annular groove (9), described bayonet socket (11) but the ball (4) in sliding sleeve (3) the downside annular groove (9) is lived in clamping.
2. automobile electric booster steering system according to claim 1 is characterized in that: described annular groove (9) is two; Described spiral groove (12) is eight; Ball (4) in each annular groove (9) is four, and the ball (4) in the different rings connected in star (9) is divided into four groups, the line at each group ball (4) center and the parallel axes of worm-wheel shaft (1).
3. automobile electric booster steering system according to claim 1 and 2 is characterized in that: can conduct power mutually between described worm gear (2) and the worm screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410089258XA CN100463827C (en) | 2004-12-04 | 2004-12-04 | Automobile electric booster sterring system and its treating method for rotary shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410089258XA CN100463827C (en) | 2004-12-04 | 2004-12-04 | Automobile electric booster sterring system and its treating method for rotary shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1781794A CN1781794A (en) | 2006-06-07 |
| CN100463827C true CN100463827C (en) | 2009-02-25 |
Family
ID=36772522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410089258XA Expired - Fee Related CN100463827C (en) | 2004-12-04 | 2004-12-04 | Automobile electric booster sterring system and its treating method for rotary shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100463827C (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048815A (en) * | 1989-07-18 | 1991-01-30 | 汎塑料株式会社 | Molder gear |
| CN1260450A (en) * | 1999-01-13 | 2000-07-19 | 伊利诺伊工具公司 | Locally heat-treated and hardened screw |
| JP2000234141A (en) * | 1999-02-10 | 2000-08-29 | Ntn Corp | Power transmission shaft |
| CN1278538A (en) * | 2000-06-26 | 2001-01-03 | 李保森 | High-performance reinforced and modified alloy resin |
| US20020182438A1 (en) * | 2001-05-28 | 2002-12-05 | Kazuya Wakita | Power transmission shaft |
| CN1384235A (en) * | 2001-11-27 | 2002-12-11 | 内乡县地毯工艺品集团公司 | Warp and weft knitting carpet knitter |
| CN2578807Y (en) * | 2002-11-05 | 2003-10-08 | 长春华隆汽车科技发展有限公司 | Steering torque sensor of vehicle |
| CN2630076Y (en) * | 2003-03-28 | 2004-08-04 | 中国南方航空动力机械公司 | Automobile booster steering gear |
| CN2633702Y (en) * | 2003-06-10 | 2004-08-18 | 李振全 | Electric booster turning mechanism for vehicle |
| CN2645999Y (en) * | 2003-09-09 | 2004-10-06 | 重庆驰骋轻型汽车部件股份有限公司 | Electric power assisted diverter of automobile |
-
2004
- 2004-12-04 CN CNB200410089258XA patent/CN100463827C/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048815A (en) * | 1989-07-18 | 1991-01-30 | 汎塑料株式会社 | Molder gear |
| CN1260450A (en) * | 1999-01-13 | 2000-07-19 | 伊利诺伊工具公司 | Locally heat-treated and hardened screw |
| JP2000234141A (en) * | 1999-02-10 | 2000-08-29 | Ntn Corp | Power transmission shaft |
| CN1278538A (en) * | 2000-06-26 | 2001-01-03 | 李保森 | High-performance reinforced and modified alloy resin |
| US20020182438A1 (en) * | 2001-05-28 | 2002-12-05 | Kazuya Wakita | Power transmission shaft |
| CN1384235A (en) * | 2001-11-27 | 2002-12-11 | 内乡县地毯工艺品集团公司 | Warp and weft knitting carpet knitter |
| CN2578807Y (en) * | 2002-11-05 | 2003-10-08 | 长春华隆汽车科技发展有限公司 | Steering torque sensor of vehicle |
| CN2630076Y (en) * | 2003-03-28 | 2004-08-04 | 中国南方航空动力机械公司 | Automobile booster steering gear |
| CN2633702Y (en) * | 2003-06-10 | 2004-08-18 | 李振全 | Electric booster turning mechanism for vehicle |
| CN2645999Y (en) * | 2003-09-09 | 2004-10-06 | 重庆驰骋轻型汽车部件股份有限公司 | Electric power assisted diverter of automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1781794A (en) | 2006-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1826095B1 (en) | Electric power steering apparatus using coated pulley | |
| US8636099B2 (en) | Rack-driven steering apparatus and rack-driven auxiliary power steering apparatus including the same | |
| US9614408B2 (en) | Electric linear actuator | |
| CN201240417Y (en) | Rack assisted electric redirector | |
| CN103707922A (en) | Nylon resin driven pulley | |
| US20020108803A1 (en) | Electric power steering apparatus | |
| CN101048310A (en) | Electric power steering device | |
| EP3643582A1 (en) | Shaft for steering device, method for manufacturing shaft for steering device, and electric power steering device | |
| US20170008555A1 (en) | Power steering device and method for manufacturing ball screw for power steering device | |
| US20070175295A1 (en) | Steering apparatus | |
| CN216783620U (en) | Rotary limiting structure applied to steer-by-wire | |
| CN100463827C (en) | Automobile electric booster sterring system and its treating method for rotary shaft | |
| CN107654478B (en) | Input one shaft for automobile gearbox and rough machining process of input one shaft | |
| JP2011173463A (en) | Method for manufacturing spline telescopic shaft | |
| US7798033B2 (en) | Power-assisted steering having a gear mechanism | |
| CN217713388U (en) | Universal joint assembly structure for steering column, universal joint transmission device and automobile | |
| US20200172151A1 (en) | Steering system rack with flattened portion | |
| US7631428B2 (en) | Rack and pinion steering apparatus and method of manufacturing rack shaft | |
| CN105443661A (en) | Ball screw worm speed reducer | |
| CN113260552B (en) | Linear drive shaft for electric power steering device, and methods for manufacturing linear drive shaft and electric power steering device | |
| US11781633B2 (en) | Rack bar and steering apparatus | |
| CN2756527Y (en) | Electric power-assisting turning shaft assembly for automobile | |
| EP1666335A1 (en) | Electronic control power steering device | |
| CN106369041A (en) | Eccentric shaft of precision speed reducer and precision speed reducer | |
| CN218316897U (en) | Power-assisted end speed reducing mechanism of electric circulating ball steering gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090225 Termination date: 20131204 |