CN102545468A - Linking structure of automobile electric power-assisted steering motor shaft - Google Patents
Linking structure of automobile electric power-assisted steering motor shaft Download PDFInfo
- Publication number
- CN102545468A CN102545468A CN2011104512931A CN201110451293A CN102545468A CN 102545468 A CN102545468 A CN 102545468A CN 2011104512931 A CN2011104512931 A CN 2011104512931A CN 201110451293 A CN201110451293 A CN 201110451293A CN 102545468 A CN102545468 A CN 102545468A
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- Prior art keywords
- motor shaft
- annular groove
- spline
- electric power
- assisted steering
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a linking structure of an automobile electric power-assisted steering motor shaft, which comprises a motor, the motor shaft and a speed reducer linked with the motor shaft. An annular groove is arranged in the middle of the motor shaft, knurls are arranged on the surface of the annular groove, and nylon splines are arranged in the annular groove in injection molding mode and are in interference fit linkage with inner splines of the speed reducer. The linking structure reduces motion abrasion, prolongs service life of products, reduces motion noise and vibration noise, and improves noise vibration and harshness (NVH) performance of a whole automobile.
Description
Technical field
The present invention relates to automobile electric booster steering system, be specifically related to a kind of draw bail of automobile electric power-assisted steering motor shaft.
Background technology
In recent years, electric boosting steering system is used more and more widely in China's automobile, and it has simple in structure, arrangement convenience, fuel-economizing, can realize turning to speed, and advantages such as turning to comfortableness is provided.The conventional electric-powered servo steering system is made up of transducer, ECU, input and output shaft, reducing gear and motor.The groundwork principle is that transducer inputs to ECU with turn signal, and ECU sends the instruction drive motors and rotates, and driven by motor reducing gear and output shaft rotate, and reducing gear plays to slow down and increases the effect of turning round.
Pass through the rigidity splined between traditional reducing gear and the motor, because the connection between the rigidity spline is a matched in clearance, in the process that moment of torsion transmits; Produce relative motion and impact between the interior external splines, less relatively in this motion of use initial stage and impact, be not that people pay attention to; But along with the increase of access times, the wearing and tearing between the spline are more and more serious, and relative gap is also increasing; Possibly make the spline distortion; Cause producing abnormal sound and noise in the Motor torque transmission, influence the performance of electric power steering, have a strong impact on the NVH performance of car load.
Summary of the invention
The draw bail that the purpose of this invention is to provide a kind of automobile electric power-assisted steering motor shaft, this mounting structure can be eliminated the gap between the rigidity splined, reduces the relative motion that moment of torsion transmits between spline, increases the useful life of parts.
The draw bail of a kind of automobile electric power-assisted steering motor shaft of the present invention; Comprise motor, motor shaft and the decelerator that connects with motor shaft; The middle part of said motor shaft has annular groove; The surface of this annular groove is provided with annular knurl, in annular groove, is injected with the nylon spline, and this nylon spline connects with the internal spline interference fit of decelerator.
The external splines nominal diameter value of said nylon spline is greater than the internal spline nominal diameter value of decelerator.
The present invention compared with prior art has the following advantages: since the nominal diameter value of nylon external splines greater than with the nominal diameter value of the rigidity internal spline of decelerator; Therefore spline fitted is an interference fit, relies on the strain of nylon that the rigidity spline is clamped, and eliminates gap between the two; The motion wearing and tearing have been reduced; Increase the useful life of product, reduced motion noise and vibration noise, improved car load NVH performance.
Description of drawings
Fig. 1 is the structural representation of automobile electric power-assisted steering motor shaft of the present invention;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is the cutaway view of A-A line among Fig. 2;
Fig. 4 is the present invention and decelerator mounting structure sketch map.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
The draw bail of automobile electric power-assisted steering motor shaft as shown in figures 1 and 3; Comprise the decelerator 3 that motor 1, the motor shaft 2 that connects with motor 1 and motor shaft 2 connect; On the outer surface at motor shaft 2 middle parts, have annular groove 2-1; On the surface of annular groove 2-1, be provided with annular knurl 2-1-1; In annular groove 2-1, be injected with nylon spline 2-2, and the nominal diameter value M1 of the nylon spline 2-2 after the moulding is greater than the nominal diameter value M2 of decelerator internal spline 3, nylon spline 2-2 connects with the internal spline interference fit of decelerator 3.
On the outer surface at motor shaft 2 middle parts, have annular groove 2-1; Prevent that nylon spline 2-2 from the process of moment of torsion transmission axial motion taking place; Carry out annular knurl processing on the surface of annular groove 2-1; Prevent nylon spline 2-2 radially rotation of distribution in the process that moment of torsion transmits, nylon spline 2-2 and motor shaft 2 are remained be fastenedly connected.In annular groove 2-1, be injected with nylon spline 2-2; And the nominal diameter value M1 of the nylon spline 2-2 after the moulding is greater than the nominal diameter value M2 of decelerator internal spline 3, like this when inside and outside splined, through the plastic deformation of nylon material; Make between the decelerator 3 of nylon spline 2-2 and rigidity and form interference fit; Thereby eliminate the gap of conventional rigid splined, played the effect of effective transfer torque, simultaneously also can absorbed oscillation.
Claims (2)
1. the draw bail of an automobile electric power-assisted steering motor shaft; Comprise motor (1), motor shaft (2) and the decelerator (3) that connects with motor shaft; It is characterized in that: the middle part of said motor shaft has annular groove (2-1); The surface of this annular groove is provided with annular knurl (2-1-1), in annular groove, is injected with nylon spline (2-2), and this nylon spline connects with the internal spline interference fit of decelerator.
2. the draw bail of automobile electric power-assisted steering motor shaft according to claim 1 is characterized in that: the external splines nominal diameter value of said nylon spline (2-2) is greater than the internal spline nominal diameter value of decelerator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104512931A CN102545468A (en) | 2011-12-30 | 2011-12-30 | Linking structure of automobile electric power-assisted steering motor shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104512931A CN102545468A (en) | 2011-12-30 | 2011-12-30 | Linking structure of automobile electric power-assisted steering motor shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102545468A true CN102545468A (en) | 2012-07-04 |
Family
ID=46351635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104512931A Pending CN102545468A (en) | 2011-12-30 | 2011-12-30 | Linking structure of automobile electric power-assisted steering motor shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102545468A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2750963Y (en) * | 2004-12-17 | 2006-01-11 | 上海汇众汽车制造有限公司 | Automobile steering gear assembly |
| CN201284795Y (en) * | 2008-10-22 | 2009-08-05 | 哈飞汽车股份有限公司 | Anti-loosening apparatus for torque transmission of segmenting shaft |
| US20100231098A1 (en) * | 2007-10-19 | 2010-09-16 | Peugeot Citroen Automobiles S.A. | Electric machine comprising an elastic connection to a gearbox primary shaft |
-
2011
- 2011-12-30 CN CN2011104512931A patent/CN102545468A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2750963Y (en) * | 2004-12-17 | 2006-01-11 | 上海汇众汽车制造有限公司 | Automobile steering gear assembly |
| US20100231098A1 (en) * | 2007-10-19 | 2010-09-16 | Peugeot Citroen Automobiles S.A. | Electric machine comprising an elastic connection to a gearbox primary shaft |
| CN201284795Y (en) * | 2008-10-22 | 2009-08-05 | 哈飞汽车股份有限公司 | Anti-loosening apparatus for torque transmission of segmenting shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |