CN201484483U - Drive device of electric power-assisted steering system - Google Patents
Drive device of electric power-assisted steering system Download PDFInfo
- Publication number
- CN201484483U CN201484483U CN2009201287319U CN200920128731U CN201484483U CN 201484483 U CN201484483 U CN 201484483U CN 2009201287319 U CN2009201287319 U CN 2009201287319U CN 200920128731 U CN200920128731 U CN 200920128731U CN 201484483 U CN201484483 U CN 201484483U
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- CN
- China
- Prior art keywords
- worm
- wheel shaft
- sensor
- crumple
- axle
- 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
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Abstract
The utility model discloses a drive device of an electric power-assisted steering system. A connection place between a crumpling shaft and a worm wheel shaft is externally and movably sleeved with a slide ring of a sensor; the worm wheel shaft between the slide ring of the sensor and a worm wheel is sleeved with a spring; the upper end and the lower end of the inner wall of the slide ring of the sensor are respectively provided with an upper locating groove and a lower locating groove along the circumference direction; the upper locating groove and the lower locating groove are internally and respectively provided with a first steel ball and a second steel ball; the lower end of the crumpling shaft is provided with an axial strip-shaped hole corresponding to the upper locating groove; the first steel ball partially falls into the bar-shaped hole; the outer wall of the upper part of the worm wheel shaft is provided with a spiral groove corresponding to the lower locating groove; the second steel ball partially falls into the spiral groove; the outer wall of the slide ring of the sensor is provided with a ring-shaped groove; and a contact head of a contact type torque sensor is clamped into the ring-shaped groove. The drive device has stable steering capability and high precision, ensures service life, is convenient for installation on a vehicle, and is beneficial to good distribution of a whole vehicle.
Description
Technical field
The utility model relates to a kind of power steering mechanism, specifically, is a kind of driving device of electric boosting steering system.
Background technology
Traditional hydraulic power-assist steering system is owing to need oil pump, oil pipe, petrol storage tank etc., complex structure, and it is bigger to take up room, and on the narrow and small wagon and pickup in space, is difficult to arrange.Electric boosting steering system EPS (electric power steering) can avoid the problems referred to above, EPS is the power steering system that a kind of direct dependence motor provides auxiliary torque, mainly by torque sensor, electrical motor, speed reduction gearing and electronic control unit compositions such as (ECU), survey the moment of torsion that driver's bearing circle when the steering operation produces or the size and Orientation of corner by sensor, and information needed changed into the digital signal Input Control Element, by control unit these signals are carried out obtaining a moment that adapts with driving cycle after the computing again, send the work of instruction driving motor at last, the output torque of electrical motor is power-assisted by the effect of driving device.Present electric boosting steering system all exists turning efficiency poor stability, problem that accuracy rate is low.
The utility model content
Technical problem to be solved in the utility model is to provide the driving device of the electric boosting steering system that a kind of turning efficiency is stable, accuracy rate is high.
In order to address the above problem, the driving device of electric boosting steering system of the present utility model, comprise the crumple axle, worm-wheel shaft, torsion bar, the worm and gear transmission, motor, contact torque sensor and casing, wherein worm-wheel shaft is supported on the casing, the upper end of this worm-wheel shaft is connected through key with the lower end of crumple axle, be installed with the worm gear of described worm and gear transmission on this worm-wheel shaft in casing, in the centre hole of this worm-wheel shaft, torsion bar is housed, the pin of the lower end of torsion bar through radially passing this torsion bar links to each other with worm-wheel shaft, the centre hole interference fit of worm-wheel shaft and crumple axle lower end is stretched out in the upper end of torsion bar, outside kink in described crumple axle and described worm-wheel shaft junction has the sensor slip ring, and on the worm-wheel shaft between this sensor slip ring and the worm gear, be set with spring, on this sensor slip ring inwall, the lower end is respectively along being circumferentially with positioning groove and following positioning groove, on this, in positioning groove and the following positioning groove first steel ball and second steel ball are housed respectively, the lower end of described crumple axle and described on positioning groove be provided with axial bar hole accordingly, described first steel ball partly falls in this bar hole, external wall of upper portion and described positioning groove down at described worm-wheel shaft are provided with plug helix accordingly, described second steel ball partly falls in this plug helix, be provided with circular groove on the outer wall of described sensor slip ring, the contact of described contact torque sensor snaps in this circular groove.
In technique scheme, the centre hole of described crumple axle lower end is up-small and down-big stepped hole, and insert in the aperture of this centre hole the upper end of described torsion bar, is circumferentially with to projecting inward spline in the hole wall upper edge of the macropore of this centre hole; Upper end at described worm-wheel shaft is provided with keyway with described spline with matching, and insert in the centre hole of crumple axle lower end the upper end of this worm-wheel shaft, and the spline in the described centre hole falls in the keyway of worm-wheel shaft upper end.
As the preferred embodiment of technique scheme, at the upper and lower end of this described sensor slip ring inwall respectively along circumferentially evenly being provided with positioning groove and 4 following positioning grooves on 4.
Compared with prior art, the beneficial effects of the utility model are: turning efficiency is stable, and the accuracy rate height is guaranteed service life, and is easy for installation onboard, helps the layout of car load.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the assembly drowing of worm-wheel shaft 5 and worm gear 11;
Fig. 3 is the front view of crumple axle 3;
Fig. 4 is the left view of crumple axle 3.
The specific embodiment
Further the utility model is illustrated below in conjunction with drawings and Examples.
Referring to Fig. 1 to 4, the driving device of electric boosting steering system is mainly by crumple axle 3, worm-wheel shaft 5, torsion bar 4, the worm and gear transmission, sensor slip ring 6, motor 9, contact torque sensor 12 and casing 13 are formed, wherein the lower end of crumple axle 3 is connected through key with the upper end of worm-wheel shaft 5, worm-wheel shaft 5 is supported on the casing 13, be installed with the worm gear 11 of worm and gear transmission on this worm-wheel shaft 5 in casing 13, the worm screw of worm and gear transmission links to each other with the output shaft of motor 9, torsion bar 4 is housed in the centre hole of this worm-wheel shaft 5, the pin 14 of the lower end of torsion bar 4 through radially passing this torsion bar 4 links to each other with worm-wheel shaft 5, the centre hole 3-1 interference fit of worm-wheel shaft 5 and crumple axle 3 lower ends is stretched out in the upper end of torsion bar 4, outside kink in crumple axle 3 and worm-wheel shaft 5 junctions has sensor slip ring 6, and on the worm-wheel shaft 5 between this sensor slip ring 6 and the worm gear 11, be set with spring 8, on these sensor slip ring 6 inwalls, positioning groove and 4 following positioning grooves are gone up along being circumferentially with 4 respectively in the lower end, on this, in positioning groove and the following positioning groove first steel ball 10 and second steel ball 7 are housed respectively, the lower end of described crumple axle 3 and described on positioning groove be provided with axial bar hole 3-3 accordingly, described first steel ball, 10 parts fall in this bar hole 3-3, external wall of upper portion and described positioning groove down at described worm-wheel shaft 5 are provided with plug helix 5-1 accordingly, described second steel ball, 7 parts fall in this plug helix 5-1, be provided with circular groove on the outer wall of described sensor slip ring 6, the contact 12-1 of described contact torque sensor 12 snaps in this circular groove.
Further referring to Fig. 1, the centre hole 3-1 of crumple axle 3 lower ends is up-small and down-big stepped hole, and insert in the aperture of this centre hole 3-1 the upper end of torsion bar 4, is circumferentially with to projecting inward spline 3-2 in the hole wall upper edge of the macropore of this centre hole 3-1; Upper end at worm-wheel shaft 5 is provided with keyway 5-2 with described spline 3-2 with matching, and insert in the centre hole 3-1 of crumple axle 3 lower ends the upper end of this worm-wheel shaft 5, and the spline 3-2 in the described centre hole 3-1 falls in the keyway 5-2 of worm-wheel shaft 5 upper ends.
Principle of work of the present utility model is: crumple axle 3 and worm-wheel shaft 5 are coupled together by torsion bar 4, lower end at crumple axle 3 is provided with spline, there is keyway upper end at worm-wheel shaft 5, when torsion bar is twisted by the rotating torque effect of bearing circle, the torsional capacity of torque rod is by corner-displacement transducer, the relative rotation at torsion bar two ends is converted into the longitudinal travel of sensor slip ring 6, corner-displacement transducer is by first steel ball 10, second steel ball 7, plug helix 5-1, bar hole 3-3 and sensor slip ring 6 are formed, the twist angle that crumple axle 3 is small with respect to worm-wheel shaft 5, drive second steel ball 7 that reverses of crumple axle 3 rolls in plug helix 5-1, thereby drive sensor slip ring 6 axial motions, the contact 12-1 that sensor slip ring 6 drives contact torque sensor 12 again moves, contact torque sensor 12 constantly detects the torque signal on the crumple axle 3 like this, pass to electronic control unit ECU, simultaneously, pass to electronic control unit ECU according to the impulse singla of car speed sensor generation and can measure the speed of a motor vehicle again, ECU is according to these signals, analyzing and processing, electric current to motor 9 transmission signal control motors 9 forms suitable power steering.The power of motor 9 outputs slows down to increase by speed reduction gearing and turns round, and gives the worm gear worm-wheel shaft with transmission of torque, and the worm gear worm-wheel shaft is connected by universal connecing with turning to the lower prop assembly, and transmission of torque is gone out, and forms steering power.
Claims (3)
1. the driving device of an electric boosting steering system, comprise crumple axle (3), worm-wheel shaft (5), torsion bar (4), the worm and gear transmission, motor (9), contact torque sensor (12) and casing (13), wherein worm-wheel shaft (5) is supported on the casing (13), the upper end of this worm-wheel shaft (5) is connected through key with the lower end of crumple axle (3), be installed with the worm gear (11) of described worm and gear transmission on this worm-wheel shaft (5) in casing (13), torsion bar (4) is housed in the centre hole of this worm-wheel shaft (5), the pin (14) of the lower end of torsion bar (4) through radially passing this torsion bar (4) links to each other with worm-wheel shaft (5), centre hole (3-1) interference fit of worm-wheel shaft (5) and crumple axle (3) lower end is stretched out in the upper end of torsion bar (4), it is characterized in that: the outside kink in described crumple axle (3) and described worm-wheel shaft (5) junction has sensor slip ring (6), and on the worm-wheel shaft (5) between this sensor slip ring (6) and the worm gear (11), be set with spring (8), on this sensor slip ring (6) inwall, the lower end is respectively along being circumferentially with positioning groove and following positioning groove, on this, in positioning groove and the following positioning groove first steel ball (10) and second steel ball (7) are housed respectively, lower end and the described positioning groove of going up at described crumple axle (3) are provided with axial bar hole (3-3) accordingly, described first steel ball (10) part falls in this bar hole (3-3), external wall of upper portion and described positioning groove down at described worm-wheel shaft (5) are provided with plug helix (5-1) accordingly, described second steel ball (7) part falls in this plug helix (5-1), be provided with circular groove on the outer wall of described sensor slip ring (6), the contact (12-1) of described contact torque sensor (12) snaps in this circular groove.
2. the driving device of electric boosting steering system according to claim 1, it is characterized in that: the centre hole (3-1) of described crumple axle (3) lower end is up-small and down-big stepped hole, insert in the aperture of this centre hole (3-1) upper end of described torsion bar (4), is circumferentially with to projecting inward spline (3-2) in the hole wall upper edge of the macropore of this centre hole (3-1); Upper end at described worm-wheel shaft (5) is provided with keyway (5-2) with described spline (3-2) with matching, insert in the centre hole (3-1) of crumple axle (3) lower end the upper end of this worm-wheel shaft (5), and the spline (3-2) in the described centre hole (3-1) falls in the keyway (5-2) of worm-wheel shaft (5) upper end.
3. the driving device of electric boosting steering system according to claim 1 is characterized in that: the upper and lower end at this described sensor slip ring (6) inwall is gone up positioning grooves and 4 following positioning grooves along circumferentially evenly being provided with 4 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201287319U CN201484483U (en) | 2009-09-04 | 2009-09-04 | Drive device of electric power-assisted steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201287319U CN201484483U (en) | 2009-09-04 | 2009-09-04 | Drive device of electric power-assisted steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201484483U true CN201484483U (en) | 2010-05-26 |
Family
ID=42423376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201287319U Expired - Fee Related CN201484483U (en) | 2009-09-04 | 2009-09-04 | Drive device of electric power-assisted steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201484483U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494818A (en) * | 2011-12-02 | 2012-06-13 | 温州大学 | Torque sensor for double-laser signal |
| TWI494238B (en) * | 2013-01-16 | 2015-08-01 | Kwang Yang Motor Co | Electron powered auxiliary steering device with pre-twisting function |
| CN110282006A (en) * | 2016-10-09 | 2019-09-27 | 中国北方车辆研究所 | A kind of manual mode of electric power steering device |
-
2009
- 2009-09-04 CN CN2009201287319U patent/CN201484483U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494818A (en) * | 2011-12-02 | 2012-06-13 | 温州大学 | Torque sensor for double-laser signal |
| CN102494818B (en) * | 2011-12-02 | 2013-07-31 | 温州大学 | Torque sensor for double-laser signal |
| TWI494238B (en) * | 2013-01-16 | 2015-08-01 | Kwang Yang Motor Co | Electron powered auxiliary steering device with pre-twisting function |
| CN110282006A (en) * | 2016-10-09 | 2019-09-27 | 中国北方车辆研究所 | A kind of manual mode of electric power steering device |
| CN110282006B (en) * | 2016-10-09 | 2020-08-18 | 中国北方车辆研究所 | Manual mode of electric power steering device |
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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: 20100526 Termination date: 20160904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |