CN203567800U - Double-pinion type electric power steering system - Google Patents
Double-pinion type electric power steering system Download PDFInfo
- Publication number
- CN203567800U CN203567800U CN201320800402.0U CN201320800402U CN203567800U CN 203567800 U CN203567800 U CN 203567800U CN 201320800402 U CN201320800402 U CN 201320800402U CN 203567800 U CN203567800 U CN 203567800U
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- housing
- tooth
- tooth piece
- piece housing
- steering system
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- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- 238000009434 installation Methods 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 239000004033 plastic Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
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Abstract
The utility model relates to a double-pinion type electric power steering system which comprises a power-assisted motor, a transmission gear pair and a driving gear pair, wherein a transmission shell and a driving shell are respectively arranged outside the transmission gear pair and the driving gear pair and are arranged in a split-type manner; the transmission shell comprises a first tooth-section shell and a transmission gear shell; the driving shell comprises a second tooth-section shell and a driving gear shell; a shell of a rack consists of the first tooth-section shell and the second tooth-section shell; the second tooth-section shell can rotate relative to the first tooth-section shell along the circumferential direction. The tooth-directional phase error of two tooth sections of the rack is compensated by adjusting an assembling phase difference between the driving shell and the transmission shell along the circumferential direction, so that the matching precision between the gear pairs is improved. On the basis of reducing the technical difficulty, the equipment cost and the processing cost, the fault rate of the electric power steering system is further lowered, and the service life is prolonged.
Description
Technical field
The utility model belongs to wheel steering system field, is specifically related to a kind of double-pinion type electric boosting steering system.
Background technology
In order to alleviate the burden of chaufeur when the Vehicular turn, in vehicle, conventionally adopt electric boosting steering system to assist chaufeur to complete Vehicular turn action.Vehicle for different front axle loads, the position that assist motor is installed is also different, existing electric boosting steering system can be divided into following several version according to the difference of assist motor installation site: C-EPS(Column Electric Power Steering, pipe column type electric servo steering system), P-EPS(Pinion Electric Power Steering, gear type electric boosting steering system) and R-EPS(Rack Electric Power Steering, rack-and-pinion electric boosting steering system).
For the medium vehicle of front axle load, assist motor and retarder are connected with deflector gear, and what adopt is P-EPS version.In the process of the actual lift-launch of vehicle electric boosting steering system, due to the impact on electric boosting steering system such as vehicle motor, change speed gear box, chassis environment and temperature field, existence cannot be arranged the situation of P-EPS.Based on this, on the basis of P-EPS, extend DP-EPS(Duo-Pinion Electric Power Steering, double-pinion type electric boosting steering system), Fig. 1-4 are depicted as existing double-pinion type electric boosting steering system schematic diagram, it comprises independently rack-and-gear transmission of assist motor 4 and two pairs, be driving gear pair 10 and driving gear wheel set 20, driving gear pair 10 is comprised of transmission gear 11 and tooth bar 30 engagements, and driving gear wheel set 20 is comprised of driven wheel 21 and tooth bar 30 engagements.Figure 2 shows that the inner structure schematic diagram of Fig. 1.This electric boosting steering system adopts double-pinion type structure.Driving gear pair 10 is beaten the moment of bearing circle for transmitting hand of driver, driving gear wheel set 20 is for transmitting the assist torque of drive motor.
The tooth bar 30 that existing double-pinion type electric boosting steering system adopts has two sections tooth section, first has tooth section 31 and second to have tooth section 32, first has tooth section 31, second to have tooth section 32 to be meshed with transmission gear 11, driven wheel 21 respectively, as shown in Figure 3, Figure 3 shows that the structural representation of tooth bar 30.
Two sections of tooth parameter differences that have tooth section due to tooth bar 30, and should guarantee certain phase difference requirement between the active flank of the active flank of transmission gear 11-tooth bar 30 and driven wheel 21-tooth bar 30, tooth bar 30 is being added to man-hour, higher to the accuracy requirement of Fabricating machinery.Figure 4 shows that two sections of teeth directional phase difference schematic diagrams that have tooth section of tooth bar 30, dotted line A first has the perpendicular line of nodel line place plane of the tooth of tooth section, dotted line B second has the perpendicular line of nodel line place plane of the tooth of tooth section, the phase difference that the angle a between dotted line A and dotted line B need to guarantee while being manufacturing gear strip 30.Particularly when Fabricating machinery cannot just complete the man-hour that adds to tooth bar 30 through clamped one time, secondary clamping can cause the error of angle a to increase, now, just higher to guaranteeing that the processing technology of the phase difference of tooth bar 30 requires, cause the increase of equipment tooling cost or the decline of Qualified Products Rate.
If the two ends of the tooth bar processing 30 have the teeth directional phase difference of tooth section can not meet operating needs, when double-pinion type electric boosting steering system is assemblied in vehicle, can cause assembling difficulty, or when using vehicle et out of order, all can affect service life of vehicle.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of double-pinion type electric boosting steering system, the housing of the tooth bar of this electric boosting steering system adopts split-type structural, in the process of housing that tooth bar is installed, by adjusting angle of assembling between transmission housing and drive shell, thereby can make up tooth bar, adding two sections of teeth directional phase errors that have tooth section that form man-hour.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A double-pinion type electric boosting steering system, comprises assist motor, driving gear pair and driving gear wheel set, and described driving gear pair is comprised of transmission gear and tooth bar engagement, and described driving gear wheel set is comprised of driven wheel and tooth bar engagement.It is split type setting that described driving gear pair and driving gear wheel set are respectively equipped with transmission housing and drive shell and described transmission housing and drive shell outward.Described transmission housing comprises that first has tooth piece housing and transmission gear housing, described drive shell comprises that second has tooth piece housing and driven wheel housing, the housing of described tooth bar has tooth piece housing and described second to have the connection of tooth piece housing to assembly by described first, and described second has tooth piece housing along the circumferential direction relative to first, to have tooth piece housing to rotate.
Further, described first has the connection assembling end of tooth piece housing to comprise the first flange, and described second has the connection assembling end of tooth piece housing to comprise the second flange and fixing structure, together with described the first flange is bolted with the second flange.
Further, described the second flange is provided with several curved waist holes, and described fixing structure is provided with injection slot and the knock hole being interconnected, described injection slot the setting party of described fixing structure to for along the circumferential direction.Described the first flange is provided with several screw corresponding with described waist hole and injecting holes corresponding with described injection slot.Plastic melt can be injected and in described injection slot and described knock hole and after plastic melt cooled and solidified, by first, be had tooth piece housing and described second to have between tooth piece housing along the circumferential direction to fix with each other by described injecting hole.
Further, described transmission housing is provided with the first installation foot, and it is integral type structure that described the first installation foot and described first has tooth piece housing.Described drive shell is provided with the second installation foot, and it is split-type structural that described the second installation foot and described second has tooth piece housing, and described the second installation foot can along the circumferential direction have tooth piece housing to do rotation adjustment around described second.
Further, described fixing structure is also provided with seal groove, and described seal groove seals by seal ring.
Further, described first to have tooth piece housing and described transmission gear housing be integral type structure, and described second to have tooth piece housing and described driven wheel housing be integral type structure.Described transmission gear is arranged on described transmission gear enclosure interior, and described driven wheel is arranged on described driven wheel enclosure interior.
Further, described the second installation foot comprises Rubber Parts and metal plate punching part.
Employing the utlity model has following beneficial effect:
1, double-pinion type electric boosting steering system described in the utility model adopts Split type casing structure, can be by adjusting drive shell and transmission housing assembling phase difference along the circumferential direction, make up tooth bar and add two sections of teeth directional phase errors that have tooth section that stay man-hour doing tooth, transmission gear and driven wheel are all meshed with tooth bar better, improve the quality of fit between gear pair.The fault rate that has reduced electric boosting steering system, increases the service life.
2, owing to can making up at assembling stage two sections of teeth directional phase errors that have tooth section of tooth bar, therefore can reduce the requirement on machining accuracy of tooth bar, and then reduce the technology difficulty that tooth bar is processed, even can carry out twice clamping with monodentate Fabricating machinery and come two sections of manufacturing gear strip to have tooth section.The reduction of technology difficulty, can reduce equipment cost and tooling cost.
3, by the mode of injection moulding, drive shell and transmission housing are along the circumferential direction fixed, avoid housing dislocation and loosening, the functional reliability of electric boosting steering system is strengthened, further reduced the fault rate of electric boosting steering system.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.
Fig. 1 is the structural representation of existing double-pinion type electric boosting steering system;
Fig. 2 is the inner structure schematic diagram of existing double-pinion type electric boosting steering system;
Fig. 3 is the structural representation of tooth bar;
Fig. 4 is the teeth directional phase difference schematic diagram that two sections of tooth bar have tooth section;
Fig. 5 is the structural representation of a kind of double-pinion type electric boosting steering system of the utility model embodiment;
Fig. 6 is the part-structure schematic diagram of the drive shell of the utility model embodiment;
Fig. 7 is the structural representation of the second flange of the utility model embodiment;
Fig. 8 is the cross-sectional schematic along the fixing structure of C-C direction in Fig. 6;
Fig. 9 is the part-structure schematic diagram of the transmission housing of the utility model embodiment;
Figure 10 is the cross-sectional schematic along the first flange of D-D direction in Fig. 9;
Figure 11 is the structural representation of the second installation foot of the utility model embodiment.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
A kind of double-pinion type electric boosting steering system of the utility model embodiment, comprise assist motor 4, driving gear pair 10 and driving gear wheel set 20, described driving gear pair 10 is comprised of transmission gear 11 and tooth bar 30 engagements, and described driving gear wheel set 20 is comprised of driven wheel 21 and tooth bar 30 engagements.
Referring to Fig. 5-11.The housing of described double-pinion type electric boosting steering system is split-type structural and is comprised of transmission housing 5 and drive shell 6.Described transmission housing 5 comprises that first has tooth piece housing 51 and transmission gear housing 52, and described first has tooth piece housing 51 and described transmission gear housing 52 for integral type structure, and described transmission gear 11 is arranged on described transmission gear housing 52 inside.Described drive shell 6 comprises that second has tooth piece housing 61 and driven wheel housing 62, and described second has tooth piece housing 61 and described driven wheel housing 62 for integral type structure, and described driven wheel 21 is arranged on described driven wheel housing 62 inside.
The housing of described tooth bar 30 has tooth piece housing 51 and described second to have 61 connections of tooth piece housing to assembly by described first.Described first has the connection assembling end of tooth piece housing 51 to comprise the first flange 54, and described second has the connection assembling end of tooth piece housing 61 to comprise the second flange 64 and fixing structure 65, together with described the first flange 54 is bolted with described the second flange 64.
Described the second flange 64 is provided with three curved waist holes 641, and by adjusting bolt, in 641Zhong position, described waist hole, described first has tooth piece housing 51 can be along the circumferential direction relatively described second to have tooth piece housing 61 to do phase place adjustment.Before the bolt-locking between described the first flange 54 and described the second flange 64, can within the angular range in described waist hole 641, to described first, there is tooth piece housing 51 to do phase place adjustment.
Described fixing structure 65 is provided with injection slot 651 and the knock hole 652 being interconnected, described injection slot 651 the setting party of described fixing structure 65 to for along the circumferential direction.Described the first flange 54 is provided with three screws 541 corresponding with described waist hole 641 and the injecting hole 542 corresponding with described injection slot 651.When described the first flange 54 is assembled together with described the second flange 64, described injecting hole 542 is connected with described injection slot 651.
Because the input shaft of running part is connected with steering column tween drive shaft, vehicle has certain requirement to the comfort level turning to simultaneously, therefore from bearing circle to deflector, arrange that turning point (being mainly universal joint cross) has corresponding requirement, universal-joint center of turn point coordinate can not change.Therefore, need to have tooth piece housing 51 to be designed to integral structure with described first the first installation foot 53 of described transmission housing 5, described the first installation foot 53 and described first has between tooth piece housing 51 can not be done adjustment is installed.
On the other hand, owing to having tooth piece housing 61 relatively described first to have tooth piece housing 51 to do the adjustment of circumferencial direction by described second, thereby two sections that make described tooth bar 30 have the teeth directional phase error of tooth section to be made up, after described second has tooth piece housing 61 and described first to have to be mounted with between tooth piece housing 51, need to adjust the second installation foot 63 and described second relative installation having between tooth piece housing 61 of described drive shell 6.Therefore have tooth piece housing 61 to be designed to split-type structural with described second the second installation foot 63 of described drive shell 6, described the second installation foot 63 can along the circumferential direction have tooth piece housing 61 to do rotation adjustment around described second.
The assembly technology of double-pinion type electric boosting steering system described in the utility model is as follows:
1) first, described driving gear pair 10 and described transmission housing 5 erections is good, and now, described transmission gear 11 and described first has between tooth section 31 and meshes together well.
2) then, the engagement situation that has tooth section 32 according to described driven wheel 21 and described second, adjust described drive shell 6 and described transmission housing 5 phase difference along the circumferential direction, make up described tooth bar 30 and at tooth, add two sections of teeth directional phase errors that have tooth section that carry over man-hour, described driven wheel 21 and second is had between tooth section 32 and mesh together well.
3) after two secondary miniature gears pairs install, O type circle is positioned in the seal groove 653 of described fixing structure 65 for water-proff packing, with bolt, described the first flange 54 is assembled together with described the second flange 64, now bolt is in Pre strained state.
4) afterwards plastic melt is injected to described injection slot 651 and described knock hole 652 by described injecting hole 542, after plastic melt cooled and solidified, described first has tooth piece housing 51 and described second to have between tooth piece housing 61 along the circumferential direction fixes with each other.Make first to have tooth piece housing 51 to have in use more difficult dislocation of tooth piece housing 61 with described second, can slow down the impact on described double-pinion type electric boosting steering system after bolt looseness simultaneously.
5) last, after two pinion rack-drivings pairs have been assembled, by the bolt tightening between described the first flange 54 and described the second flange 64, adopt bolt surely to turn round connection; And adjust the circumferential installation site of the relatively described drive shell 6 of described the second installation foot 63, complete assembling.
Described the second installation foot 63 comprises Rubber Parts 631 and metal plate punching part 632.631 pairs of described double-pinion type electric boosting steering systems of described Rubber Parts play the action effect of damping, and described metal plate punching part 632 can rotate around described drive shell 6, and the inside that adapts to vehicle with this is installed and connected requirement.
Double-pinion type electric boosting steering system described in the utility model adopts double pinion structure can evade the impact of part vehicle adverse environmental factors, simultaneously, owing to having independently rack-and-gear transmission of two pairs, described driving gear pair 10 generally only bears the moment that hand is beaten bearing circle, and the intensity of described transmission gear 11 is subject to the impact of described tooth bar 30 thrust sizes hardly.Therefore, double-pinion type electric boosting steering system described in the utility model both can meet vehicle on rack-and-gear line angle than the requirement of (affecting steering wheel turn number) (being determined by driving gear pair 10), can make again electric boosted drive part guarantee enough transmission intensity.Double pinion structure makes vehicle possess enough adjustment spaces, makes electric boosting steering system have better matching.
Claims (7)
1. a double-pinion type electric boosting steering system, comprise assist motor (4), driving gear pair (10) and driving gear wheel set (20), described driving gear pair (10) is comprised of transmission gear (11) and tooth bar (30) engagement, described driving gear wheel set (20) is comprised of driven wheel (21) and tooth bar (30) engagement, it is characterized in that: outside described driving gear pair (10) and driving gear wheel set (20), be respectively equipped with transmission housing (5) and drive shell (6) and described transmission housing (5) and drive shell (6) for split type setting; Described transmission housing (5) comprises that first has tooth piece housing (51) and transmission gear housing (52), described drive shell (6) comprises that second has tooth piece housing (61) and driven wheel housing (62), the housing of described tooth bar (30) has tooth piece housing (51) and described second to have tooth piece housing (61) connection to assembly by described first, and described second has tooth piece housing (61) along the circumferential direction relative to first, to have tooth piece housing (51) to rotate.
2. according to a kind of double-pinion type electric boosting steering system claimed in claim 1, it is characterized in that: described first has the connection assembling end of tooth piece housing (51) to comprise the first flange (54), described second has the connection assembling end of tooth piece housing (61) to comprise the second flange (64) and fixing structure (65), and described the first flange (54) and the second flange (64) are bolted together.
3. according to a kind of double-pinion type electric boosting steering system claimed in claim 2, it is characterized in that: described the second flange (64) is provided with several curved waist holes (641), described fixing structure (65) is provided with injection slot (651) and the knock hole (652) being interconnected, described injection slot (651) the setting party of described fixing structure (65) to for along the circumferential direction; Described the first flange (54) is provided with several screws (541) corresponding with described waist hole (641) and the injecting hole (542) corresponding with described injection slot (651); Plastic melt can be injected in described injection slot (651) and described knock hole (652) and by first, be had tooth piece housing (51) and described second to have between tooth piece housing (61) after plastic melt cooled and solidified by described injecting hole (542) and along the circumferential direction fix with each other.
4. according to a kind of double-pinion type electric boosting steering system described in claim 2 or 3, it is characterized in that: described transmission housing (5) is provided with the first installation foot (53), described the first installation foot (53) and described first has tooth piece housing (51) for integral type structure; Described drive shell (6) is provided with the second installation foot (63), it is split-type structural that described the second installation foot (63) and described second has tooth piece housing (61), and described the second installation foot (63) can along the circumferential direction have tooth piece housing (61) to do rotation adjustment around described second.
5. according to a kind of double-pinion type electric boosting steering system claimed in claim 4, it is characterized in that: described fixing structure (65) is also provided with seal groove (653), described seal groove (653) seals by seal ring.
6. according to a kind of double-pinion type electric boosting steering system claimed in claim 5, it is characterized in that: described first has tooth piece housing (51) and described transmission gear housing (52) for integral type structure, described second to have tooth piece housing (61) and described driven wheel housing (62) be integral type structure; Described transmission gear (11) is arranged on described transmission gear housing (52) inside, and described driven wheel (21) is arranged on described driven wheel housing (62) inside.
7. according to a kind of double-pinion type electric boosting steering system claimed in claim 6, it is characterized in that: described the second installation foot (63) comprises Rubber Parts (631) and metal plate punching part (632).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800402.0U CN203567800U (en) | 2013-12-06 | 2013-12-06 | Double-pinion type electric power steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800402.0U CN203567800U (en) | 2013-12-06 | 2013-12-06 | Double-pinion type electric power steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203567800U true CN203567800U (en) | 2014-04-30 |
Family
ID=50535547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320800402.0U Expired - Lifetime CN203567800U (en) | 2013-12-06 | 2013-12-06 | Double-pinion type electric power steering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203567800U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106143595A (en) * | 2016-08-30 | 2016-11-23 | 昆山莱捷有色金属有限公司 | A kind of long shell steering gear |
| CN107161214A (en) * | 2017-07-03 | 2017-09-15 | 昆山莱捷有色金属有限公司 | A kind of steering gear long shell |
| CN111730294A (en) * | 2020-07-02 | 2020-10-02 | 安徽德孚转向系统股份有限公司 | Production process of steering engine shell for electric power steering system for light commercial vehicle |
-
2013
- 2013-12-06 CN CN201320800402.0U patent/CN203567800U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106143595A (en) * | 2016-08-30 | 2016-11-23 | 昆山莱捷有色金属有限公司 | A kind of long shell steering gear |
| CN106143595B (en) * | 2016-08-30 | 2018-10-23 | 昆山莱捷有色金属有限公司 | A kind of long shell steering gear |
| CN107161214A (en) * | 2017-07-03 | 2017-09-15 | 昆山莱捷有色金属有限公司 | A kind of steering gear long shell |
| CN111730294A (en) * | 2020-07-02 | 2020-10-02 | 安徽德孚转向系统股份有限公司 | Production process of steering engine shell for electric power steering system for light commercial vehicle |
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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: 20140430 |