CN203294176U - Electric power steering device of four-wheel motor vehicle - Google Patents
Electric power steering device of four-wheel motor vehicle Download PDFInfo
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- CN203294176U CN203294176U CN2013203211927U CN201320321192U CN203294176U CN 203294176 U CN203294176 U CN 203294176U CN 2013203211927 U CN2013203211927 U CN 2013203211927U CN 201320321192 U CN201320321192 U CN 201320321192U CN 203294176 U CN203294176 U CN 203294176U
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Abstract
The utility model relates to an electric power steering device of a four-wheel motor vehicle. The electric power steering device of the four-wheel motor vehicle comprises an input shaft, an output shaft, a torsion bar and a motor. A worm wheel is arranged on the output shaft. A shaft of the motor is connected with a worm. The worm wheel is meshed with the worm. One end of the torsion bar is fixedly connected with the output shaft in a shaft locating mode in the circumferential direction through a pin and the other end of the torsion bar is in spline fit with the input shaft. The output shaft is in spline fit with the input shaft. A multi-spiral-groove section is arranged on the output shaft. The section, provided with multiple spiral grooves, of the output shaft is sleeved with a lead screw sleeve. Annular grooves which extend in the circumferential direction are formed in the inner wall of the lead screw sleeve. Steel balls are arranged between the annular grooves of the lead screw sleeve and the spiral grooves of the output shaft. Each steel ball falls into one notch groove of the input shaft. A return spring is arranged between the lead screw sleeve and the worm wheel. The input shaft is supported by an upper shell body through a bearing. The output shaft is supported by a lower shell body through a bearing. The upper shell body is connected with the lower shell body through a flange. The input shaft, the output shaft and the worm wheel arranged on the output shaft are axially located. The electric power steering device of the four-wheel motor vehicle is simple in structure and high in aligning speed.
Description
Technical field
The utility model relates to a kind of servo steering device, is specifically related to a kind of four-wheeled vehicle electric power-assisted steering apparatus.
Background technology
Traditional four-wheeled vehicle steering swivel system is hydraulic pressure or mechanical type.The mechanical feel that turns to lays particular stress on, and the Hydraulic Pump of the steering swivel system of fluid pressure type is always in running order, and oil consumption is large.Vehicle electric power-assisted steering device (EPS) is a kind of young mobile steering swivel system of motor integration.It is on the basis of manual steering gear, according to the dtc signal and the vehicle speed signal that act on steering handwheel, by electronic control package, make motor produce the auxiliary force of corresponding size, assist chaufeur to carry out handling maneuver, and obtain the Fu of best cornering properties.Chinese patent CN1084688C discloses a kind of electric booster steering device for automobile, and it is to be interconnected by torsion bar by input shaft and output block, then obtains rotative speed by magnet ring and attached sensors, this diverter structure complexity, and time positive speed is slow.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and a kind of four-wheeled vehicle electric power-assisted steering apparatus is provided, and this electric power-assisted steering apparatus simple in structure return positive speed fast, and it is short also to have time of setting up, the advantage that efficiency of assembling is high.
the purpose of this utility model is achieved in that a kind of four-wheeled vehicle electric power-assisted steering apparatus, comprise input shaft, output shaft, torsion bar and motor, described output shaft is provided with turbine, the axle connecting worm of described motor, described turbine and worm mesh, described output shaft is provided with axial hole, one axial end of described output shaft is provided with outer spline section, described input shaft is provided with three grades of stepped holes, the two-stage stepped hole of three grades of stepped hole miner diameter ends of described input shaft is respectively equipped with female splines, the end face of three grades of stepped hole bigger diameter ends of described input shaft is provided with a plurality of gap slots that extend vertically, one end of described torsion bar stretches in the axial hole of output shaft, circumferentially fixing by pin and output shaft axle location, the other end of described torsion bar stretches in three grades of stepped holes of input shaft, by the male splines of being located at the torsion bar other end, with the female splines of the miner diameter end of the two-stage stepped hole of three grades of stepped hole miner diameter ends of input shaft, coordinate, the outer spline section of described output shaft coordinates with the female splines of the bigger diameter end of the two-stage stepped hole of three grades of stepped hole miner diameter ends of input shaft, the outer spline section of described output shaft and the shaft part between turbine are provided with multi-head spiral groove, output shaft has screw rod bushing being provided with on the shaft part of multi-head spiral groove cover, described screw rod bushing inwall is provided with the circular groove that extends along circumferentially, between the circular groove of screw rod bushing and the plug helix of output shaft, be provided with steel ball, described steel ball falls into the gap slot of input shaft, between described screw rod bushing and worm gear, be provided with pull back spring, described input shaft by bearings in upper shell, described output shaft by bearings in lower house, upper shell is connected by flange with lower house, by input shaft, turbine axial location on output shaft and output shaft.
The upper and lower axial two ends of the inwall of described screw rod bushing respectively are provided with the circular groove that circumferentially extend on an edge, between two circular grooves of screw rod bushing and the plug helix of output shaft, be equipped with a plurality of steel balls, the steel ball between the circular groove of the upper end of screw rod bushing and the plug helix of output shaft falls into the gap slot of input shaft.
Described upper shell is provided with worm screw installation cavity and turbine installation cavity, described worm screw installation cavity cuts mutually with the turbine installation cavity, described worm screw two ends arrange respectively bearing, and in the worm screw installation cavity of upper shell, described worm screw installation cavity is fixedly connected with the mount pad of motor by bearings.
Described input shaft is stepped shaft, and described upper shell is provided with the first stepped hole, and described input shaft is provided with clutch shaft bearing, and in the first stepped hole of upper shell, the upper end of clutch shaft bearing is provided with the first oil sealing by the clutch shaft bearing axial location.
Described output shaft is stepped shaft, described lower house is provided with the second stepped hole, described output shaft is provided with the second bearing and the 3rd bearing, described the second bearing is positioned at turbine supported underneath turbine, the 3rd bearing lower end is provided with circlip, in the second stepped hole of lower house, the lower end of described circlip is provided with the second oil sealing by the circlip axial location.
The gap slot of described input shaft is four, and four gap slots distribute along the hole wall even circumferential of three grades of stepped hole bigger diameter ends of input shaft.
The beneficial effects of the utility model are: the utility model comprises input shaft, output shaft, torsion bar and motor, and input shaft is connected by torsion bar with output shaft, and input shaft and output shaft spline fitted drive output shaft rotation when input shaft rotates.Described output shaft is provided with turbine, the axle connecting worm of described motor, and described turbine and worm mesh, by the driven by motor output shaft rotation, play the effect of power-assisted.And when input shaft rotates, the screw rod bushing that drives on output shaft endwisely slips, by the circular groove on screw rod bushing, the resistance Development pattern of electric potential type torque sensor is changed, the magnitude of voltage variation of torque sensor is gathered by controller, be input to after treatment micro controller system and carry out computing, pwm pulse signal corresponding to micro controller system output controlled motor.The utility model is only when needs turn to, and just actuating motor, produce power-assisted.And described screw rod bushing inwall is provided with the circular groove that extends along circumferentially, between the circular groove of screw rod bushing and the multi-head spiral groove of output shaft, be provided with steel ball, described steel ball falls into the gap slot of input shaft, gap slot drive steel ball by input shaft rolls along plug helix, thereby the screw rod bushing that drives on output shaft endwisely slips.This structure makes the installation of steel ball more convenient.Described input shaft is by bearings in upper shell, and described output shaft is by bearings in lower house, and upper shell is connected by flange with lower house, by the turbine axial location on input shaft, output shaft and output shaft.This structure makes that the utility model time of setting up is short, efficiency of assembling is high.And simple in structure, return positive speed.
The utility model is compared with hydraulic power system, has the following advantages: do not increase vehicle fuel consume, reduce the pollution to environment.The electric boosting steering system number of parts is few simultaneously, and the monnolithic case size is less than hydraulic power-assisted steering, is easy to arrangement and assembling.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
Fig. 3 is the assembling schematic diagram of input shaft of the present utility model and output shaft;
Fig. 4 is the structural representation of input shaft of the present utility model;
Fig. 5 is that the B-B of Fig. 4 is to cutaway view;
Fig. 6 is that the C of Fig. 5 is to view;
Fig. 7 is the structural representation of output shaft of the present utility model and turbine combination;
Fig. 8 is that the D-D of Fig. 7 is to cutaway view;
Fig. 9 is that the E of Fig. 8 is to view;
Figure 10 is the structural representation of torsion bar of the present utility model.
In accompanying drawing, 1 is input shaft, and 2 is output shaft, 3 is torsion bar, and 4 is motor, and 5 is turbine, 6 is worm screw, and 7 is upper shell, and 8 is lower house, 9,10 is bearing, and 11 is the mount pad of motor, and 12 is torque sensor, 13 is clutch shaft bearing, and 14 is the first oil sealing, and 15 is the second bearing, 16 is the 3rd bearing, and 17 is circlip, and 18 is the second oil sealing, 19 is axial hole, and 20 is outer spline section, and 21 is three grades of stepped holes, 22,23 is female splines, and 24 is gap slot, and 25 is screw rod bushing, 26 is steel ball, 27 is pull back spring, and 28 is positioning step, and 29,30 is circular groove.
The specific embodiment
Referring to Fig. 1 to Figure 10, a kind of four-wheeled vehicle electric power-assisted steering apparatus, comprise input shaft 1, output shaft 2, torsion bar 3 and motor 4.Described motor 4 is controlled by controller.The upper end of described input shaft 1 arranges male splines, and for bearing circle, linking, the lower end of described output shaft 2 arranges male splines, for universal-joint, lower shaft, linking.Described output shaft 2 is provided with turbine 5, the axle connecting worm 6 of described motor 4, described turbine 5 and worm screw 6 engagements.Described input shaft 1 is by bearings in upper shell 7, and described output shaft 2 is by bearings in lower house 8, and upper shell 7 is connected by flange with lower house 8, by turbine 5 axial location on input shaft 1, output shaft 2 and output shaft 2.Described upper shell 7 is provided with worm screw installation cavity and turbine installation cavity, and described worm screw installation cavity cuts mutually with the turbine installation cavity.Described worm screw two ends arrange respectively bearing 9,10, by bearing 9,10, are supported in the worm screw installation cavity of upper shell 7, and described worm screw installation cavity is fixedly connected with the mount pad 11 of motor.Described upper shell 7 is provided with torque sensor 12.Described input shaft 1 is stepped shaft, and described upper shell 7 is provided with the first stepped hole, and described input shaft 1 is provided with clutch shaft bearing 13, and in the first stepped hole of upper shell 7, the upper end of clutch shaft bearing 13 is provided with the first oil sealing 14 by clutch shaft bearing 13 axial location.Described output shaft 2 is stepped shaft, described lower house 8 is provided with the second stepped hole, described output shaft 2 is provided with the second bearing 15 and the 3rd bearing 16, described the second bearing 15 is positioned at turbine 5 supported underneath turbines 5, the 3rd bearing 16 lower ends are provided with circlip 17, in the second stepped hole of lower house 8, the lower end of described circlip 17 is provided with the second oil sealing 18 by circlip 17 axial location.Described output shaft 2 is provided with axial hole 19, and an axial end of described output shaft 2 is provided with outer spline section 20.Described input shaft 1 is provided with three grades of stepped holes 21, and the two-stage stepped hole of three grades of stepped hole 21 miner diameter ends of described input shaft 1 is respectively equipped with female splines 22,23.Described two-stage stepped hole is comprised of the miner diameter end of three grades of stepped holes 21 and the central diameter end between miner diameter end and bigger diameter end.the end face of three grades of stepped hole 21 bigger diameter ends of described input shaft 1 is provided with a plurality of gap slots 24 that extend vertically, one end of described torsion bar 3 stretches in the axial hole 19 of output shaft 2, circumferentially fixing by pin and output shaft 2 axle location, the other end of described torsion bar 3 stretches in three grades of stepped holes 21 of input shaft 1, by the male splines of being located at torsion bar 3 other ends, with the female splines 22 of the miner diameter end of the two-stage stepped hole of three grades of stepped hole 21 miner diameter ends of input shaft 1, coordinate, the outer spline section 20 of described output shaft 2 coordinates with the female splines 23 of the bigger diameter end of the two-stage stepped hole of three grades of stepped hole 21 miner diameter ends of input shaft 1, the outer spline section 20 of described output shaft 2 and the shaft part between turbine 5 are provided with multi-head spiral groove, output shaft 2 has screw rod bushing 25 being provided with on the shaft part of multi-head spiral groove cover, described screw rod bushing 25 inwalls are provided with the circular groove 29 that extends along circumferentially, between the circular groove 29 of screw rod bushing 25 and the plug helix of output shaft, be provided with steel ball 26, described steel ball 26 falls into the gap slot 24 of input shaft 1.Described circular groove 29 is at least two.The upper and lower axial two ends of the inwall of described screw rod bushing 25 respectively are provided with the circular groove 29 that circumferentially extend on an edge, between two circular grooves 29 of screw rod bushing 25 and the plug helix of output shaft 2, be equipped with a plurality of steel balls 26, the steel ball 26 between the circular groove 29 of the upper end of screw rod bushing 25 and the plug helix of output shaft falls into the gap slot 24 of input shaft 1.Between described screw rod bushing 25 and worm gear 5, be provided with pull back spring 27.Described screw rod bushing 25 is provided with positioning step 28, and pull back spring 27 is positioned between the positioning step 28 of worm gear 5 and screw rod bushing 25.The outer round surface of described screw rod bushing 25 also is provided with the circular groove 30 that extends along circumferentially.The gap slot 24 of described input shaft 1 is four, and four gap slots 24 distribute along the hole wall even circumferential of three grades of stepped hole 21 bigger diameter ends of input shaft 1.
principle of work of the present utility model: can drive input shaft and rotate when wheel steering, input shaft 1 rotates and drives torsion bar 3 twistings, driving simultaneously output shaft 2 rotates, and when input shaft 1 rotates, the screw rod bushing 25 that drives on output shaft 2 endwisely slips, by the circular groove 30 on screw rod bushing 25, the resistance Development pattern of electric potential type torque sensor 12 is changed, the magnitude of voltage variation of torque sensor 12 is gathered by controller, be input to after treatment micro controller system and carry out computing, micro controller system pwm pulse signal of output correspondence again after computing passes through bridge-type metal-oxide-semiconductor circuit to 12V DC machine 4.Motor 4 drives turbine 5 by worm screw 6 again and rotates, and turbine 5 rotates drive output shaft 2 and rotates, and the torsional forces that turns to is diminished, and plays the effect of power-assisted.
Claims (6)
1. four-wheeled vehicle electric power-assisted steering apparatus, comprise input shaft, output shaft, torsion bar and motor, described output shaft is provided with turbine, the axle connecting worm of described motor, described turbine and worm mesh, it is characterized in that: described output shaft is provided with axial hole, one axial end of described output shaft is provided with outer spline section, described input shaft is provided with three grades of stepped holes, the two-stage stepped hole of three grades of stepped hole miner diameter ends of described input shaft is respectively equipped with female splines, the end face of three grades of stepped hole bigger diameter ends of described input shaft is provided with a plurality of gap slots that extend vertically, one end of described torsion bar stretches in the axial hole of output shaft, circumferentially fixing by pin and output shaft axle location, the other end of described torsion bar stretches in three grades of stepped holes of input shaft, by the male splines of being located at the torsion bar other end, with the female splines of the miner diameter end of the two-stage stepped hole of three grades of stepped hole miner diameter ends of input shaft, coordinate, the outer spline section of described output shaft coordinates with the female splines of the bigger diameter end of the two-stage stepped hole of three grades of stepped hole miner diameter ends of input shaft, the outer spline section of described output shaft and the shaft part between turbine are provided with multi-head spiral groove, output shaft has screw rod bushing being provided with on the shaft part of multi-head spiral groove cover, described screw rod bushing inwall is provided with the circular groove that extends along circumferentially, between the circular groove of screw rod bushing and the plug helix of output shaft, be provided with steel ball, described steel ball falls into the gap slot of input shaft, between described screw rod bushing and worm gear, be provided with pull back spring, described input shaft by bearings in upper shell, described output shaft by bearings in lower house, upper shell is connected by flange with lower house, by input shaft, turbine axial location on output shaft and output shaft.
2. four-wheeled vehicle electric power-assisted steering apparatus according to claim 1, it is characterized in that: the upper and lower axial two ends of the inwall of described screw rod bushing respectively are provided with the circular groove that circumferentially extend on an edge, between two circular grooves of screw rod bushing and the plug helix of output shaft, be equipped with a plurality of steel balls, the steel ball between the circular groove of the upper end of screw rod bushing and the plug helix of output shaft falls into the gap slot of input shaft.
3. four-wheeled vehicle electric power-assisted steering apparatus according to claim 1, it is characterized in that: described upper shell is provided with worm screw installation cavity and turbine installation cavity, described worm screw installation cavity cuts mutually with the turbine installation cavity, described worm screw two ends arrange respectively bearing, in the worm screw installation cavity of upper shell, described worm screw installation cavity is fixedly connected with the mount pad of motor by bearings.
4. four-wheeled vehicle electric power-assisted steering apparatus according to claim 1, it is characterized in that: described input shaft is stepped shaft, described upper shell is provided with the first stepped hole, described input shaft is provided with clutch shaft bearing, in the first stepped hole of upper shell, the upper end of clutch shaft bearing is provided with the first oil sealing by the clutch shaft bearing axial location.
5. four-wheeled vehicle electric power-assisted steering apparatus according to claim 1, it is characterized in that: described output shaft is stepped shaft, described lower house is provided with the second stepped hole, described output shaft is provided with the second bearing and the 3rd bearing, described the second bearing is positioned at turbine supported underneath turbine, the 3rd bearing lower end is provided with circlip, and in the second stepped hole of lower house, the lower end of described circlip is provided with the second oil sealing by the circlip axial location.
6. four-wheeled vehicle electric power-assisted steering apparatus according to claim 1, it is characterized in that: the gap slot of described input shaft is four, four gap slots distribute along the hole wall even circumferential of three grades of stepped hole bigger diameter ends of input shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203211927U CN203294176U (en) | 2013-06-05 | 2013-06-05 | Electric power steering device of four-wheel motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203211927U CN203294176U (en) | 2013-06-05 | 2013-06-05 | Electric power steering device of four-wheel motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203294176U true CN203294176U (en) | 2013-11-20 |
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ID=49570209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203211927U Expired - Lifetime CN203294176U (en) | 2013-06-05 | 2013-06-05 | Electric power steering device of four-wheel motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203294176U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108216359A (en) * | 2016-12-22 | 2018-06-29 | 天津市松正电动汽车技术股份有限公司 | A kind of electric hydraulic power-assisted steering structure |
| CN110492246A (en) * | 2019-08-13 | 2019-11-22 | 武汉虹信通信技术有限责任公司 | Antenna for base station lower decline angle adjusting transmission mechanism and antenna for base station |
-
2013
- 2013-06-05 CN CN2013203211927U patent/CN203294176U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108216359A (en) * | 2016-12-22 | 2018-06-29 | 天津市松正电动汽车技术股份有限公司 | A kind of electric hydraulic power-assisted steering structure |
| CN110492246A (en) * | 2019-08-13 | 2019-11-22 | 武汉虹信通信技术有限责任公司 | Antenna for base station lower decline angle adjusting transmission mechanism and antenna for base station |
| CN110492246B (en) * | 2019-08-13 | 2021-05-28 | 中信科移动通信技术有限公司 | Base station antenna electric downtilt angle adjusting transmission mechanism and base station antenna |
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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 |
Granted publication date: 20131120 |
|
| CX01 | Expiry of patent term |