CN201264643Y - Motor direct-drive steering power-assisted system - Google Patents
Motor direct-drive steering power-assisted system Download PDFInfo
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- CN201264643Y CN201264643Y CNU2008201217383U CN200820121738U CN201264643Y CN 201264643 Y CN201264643 Y CN 201264643Y CN U2008201217383 U CNU2008201217383 U CN U2008201217383U CN 200820121738 U CN200820121738 U CN 200820121738U CN 201264643 Y CN201264643 Y CN 201264643Y
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Abstract
The utility model discloses a direct-driving power-assisted steering system for a motor, which comprises a casing (1), wherein, a motor is arranged in the casing (1). The motor comprises a rotor (5), a stator (6), a winding arranged on the stator (6), and a hollow motor shaft (7), wherein, the left end of the motor shaft (7) is connected with a left bearing (3); the right end of the motor shaft (7) is connected with a right bearing (14) through a shaft sleeve (13); a torque rod (8) is arranged in the cavity of the motor shaft (7); the left end of the torque rod (8) is fixedly connected with the motor shaft (7) and the right end of the torque rod (8) is fixedly connected with the shaft sleeve (13); an encoder I (9) is arranged on the motor shaft (7) and an encoder II (10) is arranged on the shaft sleeve (13); and the wire lead of the encoder I (9), the encoder II (10) and the winding are respectively connected with a motor driving controller (17). The utility model has the characteristics of high precision, stable and reliable operation, and the like.
Description
Technical field
The utility model relates to a kind of steering boost system of motor direct-drive, especially a kind of electric-machine directly-driven steering boost system that is used on the equipment such as automobile.
Background technology
Steering boost system is born for the labour intensity that reduces chaufeur, the drive safety that improves automobile.For the automobile of today, steering boost system has become the system of an indispensability.Steering boost system has experienced the evolution of hydraulic power-assisted steering system (HPS), electronic pump hydraulic power-assisted steering system (EHPS) and state-of-the art electric turning booster system (EPS).The EPS system is accompanied by electronics, detection and motor-driven technology and grows up.Compare with the EHPS system with traditional HPS, the EPS system has solved a lot of shortcoming and defect that previous system exists, and be in particular in following aspect: at first, traveling comfort and safety are greatly enhanced; EPS has introduced the detection of the speed of a motor vehicle, bearing circle moment and position etc., and system can accurately control the size and Orientation of power steering moment according to driving safety and comfortable requirement like this.During low speed, strengthen power-assisted; And during high speed, in order to improve the driving safety of vehicle, increase resistance that can be suitable, thus improve the stability of vehicle '.Its two, the EPS system is more energy-conservation; Compare with power of motor from the power of hydraulic efficiency pressure system electronic pump, can save energy 80% (energy consumption of EPS only for the EHPS energy consumption 1/5th).Because the Hydraulic Pump of HPS links to each other with driving engine, no matter whether power-assisted, and Hydraulic Pump is all being worked, and its energy consumption is higher, accounts for the 3%--5% (energy consumption of HPS is 5-10 times of EHPS energy consumption) of gross vehicle energy consumption.Its three, the modular construction of EPS is convenient to install, debugging and maintenance, and occupation space is littler.Its four because the accurate detection of steering wheel position makes that the return performance of steering swivel system is provided greatly.Its five, the more environmental protection of EPS system because EPS adopts motor-driven, has not had hydraulic efficiency pressure system, has not just had hydraulic oil yet, so just can reduce the hydraulic oil pollution on the environments of discarding in a large number; In addition, the number of parts of EPS significantly reduces, and used various materials also still less, and are more favourable for the saving of various resources.In sum as can be seen, EPS replacement HPS and EHPS are trends of the times.
Existing electric turning booster system (EPS) is about 15 retarder owing to adopted a reduction ratio, in order to increase motor driving moment.When force aid system broke down, system can cut off being electrically connected of motor, but this moment, steering swivel system (promptly controlling the transport sector of wheel flutter) still links to each other with retarder.If need turn to this moment, retarder can rotate together so, and at this moment, retarder is operated in the speedup state, and the steering resisting torque of whole steering swivel system can increase greatly, makes steering operation intensity improve, and has increased safe hidden danger.And if when fault takes place, be electrically connected and the mechanical connection of motor do not have cut-out, can be owing to the slot effect of motor or because the breakdown brake action that causes the machine winding short circuit to form of driving circuit makes steering resisting torque double, cause bearing circle malfunctioning, thereby produce safety problem.
The utility model content
The technical problems to be solved in the utility model provides the electric-machine directly-driven steering boost system of a kind of efficient, high precision, stable and reliable operation, volume miniaturization.
In order to solve the problems of the technologies described above, the utility model provides a kind of electric-machine directly-driven steering boost system, comprise housing, in housing, be provided with motor, motor comprises rotor, stator, be positioned at the winding on the stator and the motor shaft of hollow, and the left end of motor shaft links to each other with left bearing, and the right-hand member of motor shaft links to each other with right bearing by axle sleeve, in the inner chamber of motor shaft torsion bar is set, the left end and the motor shaft of torsion bar is fixedly linked, the right-hand member and the axle sleeve of torsion bar are fixedly linked; Coder I is set on motor shaft, coder II is set on axle sleeve; The lead-in wire of coder I, coder II and winding all links to each other with motor drive controller.
Improvement as electric-machine directly-driven steering boost system of the present utility model: in the inner chamber of motor shaft needle bearing is set, the outer ring and the motor shaft of needle bearing are fixedly linked, and the inner ring of torsion bar and needle bearing is rotatedly connected.
Further improvement as electric-machine directly-driven steering boost system of the present utility model: the lead-in wire of coder I, coder II and winding all links to each other with plug, and plug links to each other with motor drive controller.
Further improvement as electric-machine directly-driven steering boost system of the present utility model: stator is for having slot type stator or slot-less stator.
Further improvement as electric-machine directly-driven steering boost system of the present utility model: be provided with the magnet ring that rare earth permanent-magnetic material is made in the rotor.
Further improvement as electric-machine directly-driven steering boost system of the present utility model: the two ends, the left and right sides of housing are respectively equipped with left end cap and right end cap, and the outer ring of left bearing is positioned at the ending cover hole of left end cap, and the outer ring of right bearing is positioned at the ending cover hole of right end cap.
Further improvement as electric-machine directly-driven steering boost system of the present utility model: the profile of housing is cylinder or square cylinder.
Further improvement as electric-machine directly-driven steering boost system of the present utility model: plug is an aviation plug.
Electric-machine directly-driven steering boost system of the present utility model is compared with existing electric turning booster system, has the following advantages:
The first, greatly simplified the structure of electric turning booster system.It has been integrated into motor in the steering boost system, and motor shaft and the torsion bar that is used for the moment detection are grouped together.So not only simplify the structure of system, can also reduce the power driven link of system, reduced the rotor inertia of system, thereby improved the operation stability and the dynamic property of system.
The second, adopt motor direct-drive, cancelled the retarder that increases motor-driven moment, reduced the transmission link of system, improved system effectiveness.Not only make structure compact more, volume is littler, and the more important thing is that it can improve the safety of system.
Directly drive the application of structure,, therefore greatly reduce resisting moment, thereby avoided the generation of situations such as bearing circle is malfunctioning owing to cancelled retarder.In the utility model, stator adopts slotless configuration, and promptly motor is the brushless slotless DC servo motor.This kind motor except having good performance, the safety problem in the time of can also eradicating force aid system and break down.As mentioned above, existing electric turning booster system can be because the malfunctioning situation of bearing circle appears in the structure problem of system when the system failure occurring, and this brings very big potential safety hazard can for the driver of vehicle.Do not have retarder and directly drive structure, the DC machine of particularly utilizing brushless slotless because the magnetic air gap between the brushless slotless DC motor rotor is very big, does not have slot effect as drive motor; When short circuit in winding, also because of magnetic air gap is very big, the brake effect of motor is very weak, thereby well avoids above-mentioned fault to occur, and therefore can eradicate the potential safety hazard that fault is brought to system.In addition, because slotless electric machines does not have slot effect, make the running stability of force aid system be greatly enhanced, particularly in the automobile low speed driving.
Three, owing to adopted magnet ring that rare earth permanent-magnetic material makes, therefore greatly improved efficiency of motor, and the volume of motor greatly reduces also as the magnet steel in the rotor.This technical scheme can save material and cut down the consumption of energy, and satisfies the strategic requirement of national green energy resource fully.
Four, after the utility model adopted integrated design, volume reduced greatly, and profile is column, was convenient to install and arrange in the very little automobile in space.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.
Fig. 1 is the cross-sectional view of electric-machine directly-driven steering boost system of the present utility model.
Among the figure:
The 1---housing, 2---left side pin, the 3---left bearing, the 4---left end cap, the 5---rotor,
The 6---stator, the 7---motor shaft, the 8---torsion bar, 9---coder I, 10---coder II,
The right pin of 11---, the 12---right end cap, the 13---axle sleeve, the 14---right bearing,
The 15---needle bearing, 16---plug, 17---motor drive controller.
The specific embodiment
Fig. 1 has provided a kind of electric-machine directly-driven steering boost system, comprises housing 1, is provided with motor in housing 1.
The profile of housing 1 can be a cylinder, also can be square cylinder.Promptly the cross-sectional plane of this housing 1 can be an annulus, also can be Q-RING.
On the left side of housing 1, be provided with left end cap 4, on the right side of housing 1, be provided with right end cap 12.Left end cap 4 can be realized being fixedly linked by the left side of form such as screw or fore shaft and housing 1, and in like manner, right end cap 12 also can be fixedly linked by the right side realization of forms such as screw or fore shaft with housing 1.Left bearing 3 is set in the ending cover hole of left end cap 4, and promptly the outer ring of left bearing 3 is fixed in the ending cover hole of left end cap 4.Right bearing 14 is set in the ending cover hole of right end cap 12, and promptly the outer ring of right bearing 14 is fixed in the ending cover hole of right end cap 12.
Motor comprises motor shaft 7, rotor 5, the stator 6 of hollow and is arranged on the machine winding of stator 6, the line of centers overlaid of the axial line of motor shaft 7 and housing 1.The inner ring of the left end of motor shaft 7 and left bearing 3 is rotatedly connected, and the right-hand member of motor shaft 7 is rotatedly connected by the inner ring of axle sleeve 13 with right bearing 14.Outside face at motor shaft 7 fixedly installs rotor 5, the magnet ring that the magnet steel in the rotor 5 adopts rare earth permanent-magnetic material to make.Inside face at housing 1 fixedly installs stator 6, and stator 6 is provided with winding, and stator 6 is selected the slot-less stator for use.Therefore the motor of selecting for use is the brushless slotless DC servo motor.
Coder I9 is set on the outside face of motor shaft 7, coder II10 is set on the outside face of axle sleeve 13; Be specially: the shell of coder I9 is fixed on the housing 1, and the runner assembly of coder I9 links to each other with the outside face of motor shaft 7; The shell of coder II10 is fixed on the housing 1, and the runner assembly of coder II10 links to each other with the outside face of axle sleeve 13.The winding leads of coder I9, coder II10 and motor all links to each other with plug 16, and plug 16 links to each other with motor drive controller 17; Plug 16 can be selected aviation plug for use.
During electric-machine directly-driven steering boost system real work of the present utility model, the Steering gear of axle sleeve 13 with the vehicle steering below linked to each other, motor drive controller 17 is linked to each other with the vehicle speed control system of automobile; The left end of motor shaft 7 is linked to each other with the transport sector of control wheel flutter; Concrete working process is as follows:
When bearing circle rotated, moment can transfer to axle sleeve 13 along with Steering gear, and further transferred to torsion bar 8; Torsion bar 8 can produce corresponding elastic deformation; Can produce relative angular displacement between axle sleeve 13 and the motor shaft 7.Like this, upward the angular signal of output will be different for coder I9, coder II10; Because the rigidity of torsion bar 8 is linear, utilizes this signal difference just can accurately draw and acts on the moment values size that motor shaft is fastened.Simultaneously, the direction difference of moment loading, positive and negative number of this difference is just different; By to coder I9 and coder II10 Signal Processing, motor drive controller 17 just can accurately calculate and act on the moment size and Orientation that motor shaft is fastened.
The moment size and Orientation that motor shaft is fastened is the basis that 17 pairs of whole electric-machine directly-driven steering boost systems of motor drive controller carry out controlled reset.According to the moment size and Orientation that motor shaft is fastened, 17 pairs of motors of motor drive controller carry out control corresponding, thereby realize the real-Time Compensation (foregoing all is equal to prior art) of power-assisted size and Orientation.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.
Claims (8)
1, a kind of electric-machine directly-driven steering boost system, comprise housing (1), in housing (1), be provided with motor, described motor comprises rotor (5), stator (6), be positioned at the winding on the stator (6) and the motor shaft (7) of hollow, the left end of motor shaft (7) links to each other with left bearing (3), the right-hand member of motor shaft (7) links to each other with right bearing (14) by axle sleeve (13), it is characterized in that: torsion bar (8) is set in the inner chamber of motor shaft (7), and the left end of described torsion bar (8) and motor shaft (7) are fixedly linked, the right-hand member of torsion bar (8) and axle sleeve (13) are fixedly linked; Coder I (9) is set on motor shaft (7), coder II (10) is set on axle sleeve (13); The lead-in wire of described coder I (9), coder II (10) and winding all links to each other with motor drive controller (17).
2, electric-machine directly-driven steering boost system according to claim 1, it is characterized in that: needle bearing (15) is set in the inner chamber of motor shaft (7), the outer ring of described needle bearing (15) and motor shaft (7) are fixedly linked, and torsion bar (8) is rotatedly connected with the inner ring of needle bearing (15).
3, electric-machine directly-driven steering boost system according to claim 1 and 2 is characterized in that: the lead-in wire of coder I (9), coder II (10) and winding all links to each other with plug (16), and described plug (16) links to each other with motor drive controller (17).
4, electric-machine directly-driven steering boost system according to claim 3 is characterized in that: described stator (6) is for having slot type stator or slot-less stator.
5, electric-machine directly-driven steering boost system according to claim 4 is characterized in that: described rotor is provided with the magnet ring that rare earth permanent-magnetic material is made in (5).
6, electric-machine directly-driven steering boost system according to claim 5, it is characterized in that: the two ends, the left and right sides of described housing (1) are respectively equipped with left end cap (4) and right end cap (12), the outer ring of described left bearing (3) is positioned at the ending cover hole of left end cap (4), and the outer ring of right bearing (14) is positioned at the ending cover hole of right end cap (12).
7, electric-machine directly-driven steering boost system according to claim 6 is characterized in that: the profile of described housing (1) is cylinder or square cylinder.
8, electric-machine directly-driven steering boost system according to claim 7 is characterized in that: described plug (16) is an aviation plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201217383U CN201264643Y (en) | 2008-07-24 | 2008-07-24 | Motor direct-drive steering power-assisted system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201217383U CN201264643Y (en) | 2008-07-24 | 2008-07-24 | Motor direct-drive steering power-assisted system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201264643Y true CN201264643Y (en) | 2009-07-01 |
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ID=40831000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201217383U Expired - Fee Related CN201264643Y (en) | 2008-07-24 | 2008-07-24 | Motor direct-drive steering power-assisted system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201264643Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786779A (en) * | 2012-10-26 | 2014-05-14 | 宁波如意股份有限公司 | Double-group pulse output electric steering gear |
| CN105356659A (en) * | 2015-12-04 | 2016-02-24 | 江苏上骐集团有限公司 | Electric material conveying vehicle driving device and control method |
| CN109347376A (en) * | 2018-11-09 | 2019-02-15 | 中国科学院长春光学精密机械与物理研究所 | Brshless DC motor braking method and system |
-
2008
- 2008-07-24 CN CNU2008201217383U patent/CN201264643Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786779A (en) * | 2012-10-26 | 2014-05-14 | 宁波如意股份有限公司 | Double-group pulse output electric steering gear |
| CN105356659A (en) * | 2015-12-04 | 2016-02-24 | 江苏上骐集团有限公司 | Electric material conveying vehicle driving device and control method |
| CN105356659B (en) * | 2015-12-04 | 2018-09-21 | 江苏上骐集团有限公司 | A kind of electric material transferring vehicle driving device and control method |
| CN109347376A (en) * | 2018-11-09 | 2019-02-15 | 中国科学院长春光学精密机械与物理研究所 | Brshless DC motor braking method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20090701 Termination date: 20100724 |