CN201110370Y - Electric power-assisted steering apparatus - Google Patents
Electric power-assisted steering apparatus Download PDFInfo
- Publication number
- CN201110370Y CN201110370Y CNU2007201752665U CN200720175266U CN201110370Y CN 201110370 Y CN201110370 Y CN 201110370Y CN U2007201752665 U CNU2007201752665 U CN U2007201752665U CN 200720175266 U CN200720175266 U CN 200720175266U CN 201110370 Y CN201110370 Y CN 201110370Y
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Abstract
An electric power-assisted steering device comprises a steering operating mechanism, a rack and pinion steering gear and an electric power-assisted device, wherein the rack and pinion steering gear comprises a tooth sector and a steering rack which are engaged with each other, and the steering operating mechanism is matched with the steering gear, the electric power-assisted device comprises a steering controller. The electric power-assisted steering device is characterized in that the device further comprises a sensor and an alarm device, wherein the sensor is used for checking the gap between the steering gear and the steering rack, an output end of the sensor is connected with an input end of the steering controller, one output of the steering controller is connected with an order starting input end of the alarm device, thereby, over small or over large gaps between the steering gear and the steering rack can be conveniently and rapidly checked out, drivers is reminded to adjust the rack and pinion gas adjustment mechanism and the rack and pinion are in normal engagement condition, thereby, the comfortableness of the automobiles is improved, simultaneously, the abrading speed of the rack and pinion is alleviated and the use and repairing cost are reduced.
Description
Technical field
The utility model relates to a kind of electric power-assisted steering apparatus.
Background technique
Pinion-and-rack steering device is a kind of of auto steerer, this device comprises steering operation mechanism, commutator, described commutator comprises steering gear and tooth bar, described steering operation mechanism matches with steering gear in the commutator, steering gear and tooth bar directly mesh, thereby handle end thrust and stroke that steering operation mechanism is converted to tooth bar respectively with the turning power and the rotational movement amount of mobile of steering gear.
Light in order to turn to, usually the power steering device can be installed.The power steering device roughly is divided into hydraulic steering unit and electric booster, and wherein, electric booster is divided into motor is installed in the tubing string booster type on the steering column and motor is installed in steering gear booster type on the gear rack in the commutator.The structure and the working principle of two kinds of electric boosters are similar, with the tubing string booster type is example, electric booster comprises torque sensor, steering controller and motor, torque sensor is used to detect the moment of torsion of steering shaft, torque sensor output torque signal is to steering controller when steering wheel rotates, steering controller sends drive signal according to torque signal, the vehicle speed signal of input to motor, and motor is exported booster torquemoment to the output shaft of steering operation mechanism by retarder.
Usually, have certain fit up gap between steering gear in the commutator and the tooth bar, also can be along with the wearing and tearing of the wearing and tearing of the gear parts of steering gear, rack tooth and tooth bar guide element and increase in this fit up gap, is reflected to and will produces certain idle running angle on the steering wheel.The angle stroke of this steering wheel in the idle running stage is called the steering wheel free travel.Suitable steering wheel free travel is favourable to relaxing road shocks, avoiding the driver overstretched, if but the steering wheel free travel is excessive, will influence to turn to sensitivity.In addition, if the fit up gap is excessive, the impact sound that the mate on the steering gear and the tooth bar flank of tooth produces also increases thereupon, causes uncomfortable sensation for the people in the automobile.If the fit up gap is too small, the turning steering force of vehicle is big, and it is hard that the driver feels.Therefore, the gap of gear rack should be limited in certain scope.
The steering gear of automobile generally all is equipped with the gear rack clearance adjustment mechanism now, but, can only judge that artificially the gear rack gap may be excessive or too small according to the sensitivity level of the free travel of steering wheel, turning steering force, steering operation at present, judge through checking further again.Otherwise can only in regular maintenance service process, check, so just can not when its predetermined range, in time not find in the gear rack gap and it be adjusted the gear rack gap.
The model utility content
The purpose of this utility model provides a kind of electric power-assisted steering apparatus, sends alarm signal when it can surpass predetermined range in the gear rack gap automatically, adjusts the gear rack gap can only judge artificially in the solution prior art.
For achieving the above object, the utility model provides a kind of electric power-assisted steering apparatus, this device comprises steering operation mechanism, rack and pinion steering gear, electric booster, described rack and pinion steering gear comprises intermeshing steering gear and steering rack, steering operation mechanism matches with steering gear, and electric booster comprises steering controller; Wherein, described device also comprises sensor and warning device, sensor is used to detect the gap between steering gear and the steering rack, the output terminal of sensor is connected to the input end of described steering controller, and an output terminal of described steering controller is connected to the enabled instruction input end of warning device.
Steering controller in the electric power-assisted steering apparatus that the utility model provides is analyzed the signal (for example pressure signal) that receives the expression gap width from described sensor, when the gap width that detects is in controller pre-set threshold scope (for example range of pressure values), the gear rack gap is described in predetermined range, gear rack is in the normal engaged state; When the gap width that detects during greater than the gap maximum set value or less than the minimum setting value in gap, steering controller is judged gear rack excesssive gap or too small, and output alarm signal is given warning device and preferably fault message stored.Thereby, the electric power-assisted steering apparatus that the utility model provides can detect gear rack excesssive gap or too small quickly and easily, so that remind the timely adjusting gear tooth bar of driver clearance adjustment mechanism, make the gear rack gap in predetermined range, gear rack is in the normal engaged state, thereby reduce the impact sound that the mate on the steering gear and the tooth bar flank of tooth produces, make the steering wheel free travel within the specific limits, improve steering operation sensitivity and relax road shocks, improved the travelling comfort of automobile.Slow down the tooth surface abrasion speed of gear rack simultaneously, reduce and use and maintenance cost.
Description of drawings
Fig. 1 is the structural representation of the electric power-assisted steering apparatus of tubing string booster type;
Fig. 2 cuts open and along the sectional drawing of direction of arrow projection along the II-II line among Fig. 1;
Fig. 3 is the electric power-assisted steering apparatus structural representation of steering gear booster type.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As Figure 1-3, the electric power-assisted steering apparatus that the utility model provides comprises steering operation mechanism, rack and pinion steering gear, electric booster, described rack and pinion steering gear comprises intermeshing steering gear 12 and steering rack 14, steering operation mechanism matches with steering gear, and electric booster comprises steering controller 5; Wherein, described device also comprises sensor 21 and warning device 22, sensor 21 is used to detect the gap between steering gear 12 and the steering rack 14, the output terminal of sensor 21 is connected to the input end of described steering controller 5, and an output terminal of described steering controller 5 connects the startup indication input end of warning device 22.
Following main reference Fig. 1,2 electric power-assisted steering apparatus with the tubing string booster type are example explanation the utility model.
Described steering operation mechanism comprises steering wheel 1, steering shaft 2, steering tube 3, auxiliary unit 6, output shaft 8, jack shaft 10 and joint 9,11.Steering wheel 1 is installed in an end of steering shaft 2, the other end of steering shaft 2 extends to steering tube 3 the insides, and be connected with an end of the torsion bar (not shown) of auxiliary unit 6, one end of output shaft 8 is connected with the other end of torsion bar, the other end of output shaft 8 is connected an end of jack shaft 10 by joint 9, the other end of jack shaft 10 is connected with steering gear 12 by joint 11, and steering operation mechanism can pass to steering gear 12 to the driver to the steering force of steering wheel 1 like this.
Except steering gear 12, steering rack 14, also comprise other accessories in the described commutator, be steering gear housing 13, bearing 15,16 and gear rack clearance adjustment mechanism.Steering gear 12 is connected with jack shaft 10 the other ends by joint 11, steering gear 12 supports by the bearing 15,16 that is positioned at gear 12 two ends and can rotate freely at the axis that steering gear housing 13 rotates to gear 12, the rack tooth engagement of the wheel tooth of steering gear 12 and steering rack 14, thereby the rotating force that can make steering gear 12 is transformed into the end thrust of steering rack 14 along its axial direction, and the rotational movement amount of mobile of steering gear 12 is transformed into the axial stroke of steering rack 14.
As shown in Figure 2, described gear rack clearance adjustment mechanism comprises tooth bar guiding briquetting 17, holddown spring 18, locking nut 19 and adjusts plug screw 20.Tooth bar guiding briquetting 17 has guiding groove, and steering rack 14 is arranged in this guiding groove, is used to limit the moving direction of steering rack 14.Holddown spring 18 is compressed in tooth bar guiding briquetting 17 and adjusts between the plug screw 20, by pushing tooth bar guiding briquetting 17 steering rack 14 is pressed against on the steering gear 12.Locking nut 19 is used for fastening adjustment plug screw 20, thereby the pretightening force that can change holddown spring 18 by displacement amount that regulate to adjust plug screw 20 changes 17 pairs of steering rack 14 applied pressures of tooth bar guiding briquetting, to reach the purpose in the gap of adjusting 14 of steering gear 12 and steering racks.
Described sensor 21 can be to well known to a person skilled in the art sensor, for example position transducer, pressure transducer etc., be preferably pressure transducer, sensor 21 is fixed on the described tooth bar guiding briquetting 17, be used to detect the pressure that tooth bar guiding briquetting 17 is subjected to, and the delivery pressure signal is to steering controller 5.
Shown in Figure 1 is the electric power-assisted steering apparatus of tubing string booster type, and this device comprises torque sensor 4, steering controller 5 and motor 7.Torque sensor 4 is used to detect the torque of steering shaft 2 and output torque signal to steering controller 5, steering controller 5 sends drive signal for motor 7 according to torque signal, the vehicle speed signal of input, the driving input end of described motor 7 is connected with an output terminal of steering controller 5, receive this drive signal, the output shaft of motor 7 is exported booster torquemoment to output shaft 8 by the retarder (not shown).
Fig. 3 is the structural representation of the electric power-assisted steering apparatus of steering gear booster type, the structural element of this device and working principle thereof are similar substantially to the electric power-assisted steering apparatus of tubing string booster type, difference is, torque sensor 4 is used to detect the moment of torsion of steering gear 12, and the output shaft of motor 7 cooperates the output booster torquemoment to steering gear 12 with steering gear 12 transmissions.
The function that above-mentioned steering controller 5 is used for assisted diversion is the basic known function of steering controller, does not do too much description at this, and wherein vehicle speed signal can be obtained from the master control ECU of vehicle.
Described steering controller 5 can be for well known to a person skilled in the art electronic control unit (ECU), and this electronic control unit can be finished functions such as reception, comparison, control, the signal of output can also be stored with the form (for example diagnostic trouble code) of encoding.The steering controller 5 that the utility model provides has the pre-set threshold scope, and the signal that sensor 21 is input to the detected representative inter-lobe clearance of steering controller 5 is carried out A/D be converted to digital value, this digital value and institute's pre-set threshold scope are compared, and according to the comparative result output alarm signal to warning device 22.Wherein the preset threshold scope is selected accordingly according to the implication of the signal of the type of sensor 21 and output, for example sensor 21 is a pressure transducer, then export the pressure signal relevant with inter-lobe clearance, then the preset threshold scope is a range of pressure values in the steering controller 5, and the threshold range of present embodiment is 127.4N～156.8N.
Specifically, sensor 21 is a pressure transducer, detect the pressure that tooth bar guiding briquetting 17 is subjected to, and detected pressure signal outputed to steering controller 5,5 pairs of pressure signals of steering controller carry out A/D and are converted to force value, and carry out following analysis: when in the range of pressure values that the force value that detects is being set, show that the gear rack gap in predetermined range, do not export any alarm signal; When the force value that detects during greater than the pressure maximum set value, judge that the gear rack gap is too small, steering controller 5 output alarm signals are given warning device 22, and preferably the form of fault message with diagnostic trouble code are stored; When the force value that detects during less than the minimum setting value of pressure, judge the gear rack excesssive gap, steering controller 5 output alarm signals are given warning device, and preferably the form of fault message with diagnostic trouble code are stored.
The pressure setting range is for when gear rack gap detected force value of pressure transducer during in predetermined range.
Described warning device 22 can be to well known to a person skilled in the art warning device, as buzzer, warning light etc., be preferably warning light, described warning light can be to well known to a person skilled in the art common bulb, LED lamp etc., is preferably the LED lamp.
Claims (7)
1, a kind of electric power-assisted steering apparatus, this device comprises steering operation mechanism, rack and pinion steering gear, electric booster, described rack and pinion steering gear comprises intermeshing steering gear (12) and steering rack (14), steering operation mechanism matches with steering gear, and electric booster comprises steering controller (5); It is characterized in that, described device also comprises sensor (21) and warning device (22), sensor (21) is used to detect the gap between steering gear (12) and the steering rack (14), the output terminal of sensor (21) is connected to the input end of described steering controller (5), and an output terminal of described steering controller (5) connects the enabled instruction input end of warning device (22).
2, electric power-assisted steering apparatus according to claim 1, it is characterized in that, described rack and pinion steering gear also comprises the gear rack clearance adjustment mechanism, this regulating mechanism comprises tooth bar guiding briquetting (17), holddown spring (18) and adjusts plug screw (20), tooth bar guide pad (17) has guiding groove, steering rack (14) is arranged in this guiding groove, and holddown spring (18) is compressed in tooth bar guiding briquetting (17) and adjusts between the plug screw (20).
3, electric power-assisted steering apparatus according to claim 2 is characterized in that, described sensor is fixed on the described tooth bar guiding briquetting (17).
4, electric power-assisted steering apparatus according to claim 3 is characterized in that, described sensor (21) is a pressure transducer.
5, electric power-assisted steering apparatus according to claim 1 is characterized in that, described warning device (22) is a warning light.
6, electric power-assisted steering apparatus according to claim 5 is characterized in that, described warning light is the LED lamp.
7, electric power-assisted steering apparatus according to claim 1, it is characterized in that, described electric booster also comprises torque sensor (4) and motor (7), described torque sensor (4) is used to detect the torque of steering shaft (2) or steering gear (12), output terminal is connected with the input end of steering controller (5), the driving input end of described motor (7) is connected with another output terminal of steering controller (5), and the output shaft of motor (7) cooperates with output shaft (8) or steering gear (12) transmission in the steering operation mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201752665U CN201110370Y (en) | 2007-08-29 | 2007-08-29 | Electric power-assisted steering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201752665U CN201110370Y (en) | 2007-08-29 | 2007-08-29 | Electric power-assisted steering apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201110370Y true CN201110370Y (en) | 2008-09-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201752665U Expired - Lifetime CN201110370Y (en) | 2007-08-29 | 2007-08-29 | Electric power-assisted steering apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201110370Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117207A (en) * | 2016-02-24 | 2017-09-01 | 操纵技术Ip控股公司 | Steering with pressure sensor |
| CN108423069A (en) * | 2018-05-09 | 2018-08-21 | 北京汽车股份有限公司 | Method for detecting abnormality, device and the vehicle of steering gear for vehicle |
| CN109424734A (en) * | 2017-08-24 | 2019-03-05 | 中联重机浙江有限公司 | A kind of speed change reversing transmission mechanism of rotary cultivator |
| CN113634928A (en) * | 2021-08-27 | 2021-11-12 | 岗春激光科技（江苏）有限公司 | Intelligent chuck of laser cutting machine |
| CN113788065A (en) * | 2021-10-20 | 2021-12-14 | 枣庄科技职业学院 | Automobile power assisting device |
| CN115303907A (en) * | 2022-09-15 | 2022-11-08 | 浙江省特种设备科学研究院 | Elevator driving sheave race wearing and tearing check out test set with adjustable safety |
| CN115956195A (en) * | 2020-05-18 | 2023-04-11 | 罗伯特博世汽车转向旺多姆股份有限公司 | Steering column equipped with means for detecting a force applied to the steering wheel |
-
2007
- 2007-08-29 CN CNU2007201752665U patent/CN201110370Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117207A (en) * | 2016-02-24 | 2017-09-01 | 操纵技术Ip控股公司 | Steering with pressure sensor |
| US10421485B2 (en) | 2016-02-24 | 2019-09-24 | Steering Solutions Ip Holding Corporation | Steering system having a pressure sensor |
| CN107117207B (en) * | 2016-02-24 | 2019-10-22 | 操纵技术Ip控股公司 | Steering system with pressure sensor |
| CN109424734A (en) * | 2017-08-24 | 2019-03-05 | 中联重机浙江有限公司 | A kind of speed change reversing transmission mechanism of rotary cultivator |
| CN109424734B (en) * | 2017-08-24 | 2023-09-12 | 中联重机浙江有限公司 | Speed-changing reversing transmission mechanism of rotary cultivator |
| CN108423069A (en) * | 2018-05-09 | 2018-08-21 | 北京汽车股份有限公司 | Method for detecting abnormality, device and the vehicle of steering gear for vehicle |
| CN115956195A (en) * | 2020-05-18 | 2023-04-11 | 罗伯特博世汽车转向旺多姆股份有限公司 | Steering column equipped with means for detecting a force applied to the steering wheel |
| CN113634928A (en) * | 2021-08-27 | 2021-11-12 | 岗春激光科技（江苏）有限公司 | Intelligent chuck of laser cutting machine |
| CN113788065A (en) * | 2021-10-20 | 2021-12-14 | 枣庄科技职业学院 | Automobile power assisting device |
| CN115303907A (en) * | 2022-09-15 | 2022-11-08 | 浙江省特种设备科学研究院 | Elevator driving sheave race wearing and tearing check out test set with adjustable safety |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080903 |