CN102435764A - Full-shielding automobile wheel speed sensor and mounting structure thereof - Google Patents
Full-shielding automobile wheel speed sensor and mounting structure thereof Download PDFInfo
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- CN102435764A CN102435764A CN2011103012219A CN201110301221A CN102435764A CN 102435764 A CN102435764 A CN 102435764A CN 2011103012219 A CN2011103012219 A CN 2011103012219A CN 201110301221 A CN201110301221 A CN 201110301221A CN 102435764 A CN102435764 A CN 102435764A
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- 238000000034 method Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention discloses a fully-shielded automobile wheel speed sensor and a mounting structure thereof, which comprises a shielding shell, an electrode pin, a coil framework, a magnetic block, a magnetic pole, a coil, a filling layer and an output lead, wherein a shielding film is arranged between the filling layer, the lower end of the magnetic pole and the lower end surface of the shielding shell, so that the magnetic loss of the magnetic pole can be reduced, the magnetic flux between the magnetic pole and a gear ring can be increased, the interference of an external magnetic field on the automobile wheel speed sensor can be prevented, and the measurement precision and the stability can be improved. The automobile hub is fixed on the automobile hub through the connecting frame. Because the automobile wheel speed sensor is fixed on the automobile hub through the connecting frame, the automobile wheel speed sensor is installed on the same supporting piece as the gear ring, synchronous vibration of the magnetic pole and the gear ring can be realized, an optimal gap is ensured to be kept between the magnetic pole and the gear ring, the magnetic spacing between the magnetic pole and the gear ring cannot be changed due to vibration generated in the automobile driving process, and the working stability of the automobile wheel speed sensor is improved.
Description
Technical field:
The present invention relates to a kind of automobile wheel speed sensor, relate in particular to electromagnetic type automobile wheel speed sensor.
Background technology:
Anti-lock braking system in automobiles is commonly called as ABS, is the important leverage system of vehicle safety travel, and its major function is when automobile emergency is braked, to prevent wheel lock up.Automobile wheel speed sensor is a sensitive element crucial in the automobile ABS, and its performance is determining the quality of ABS.Legal representative Mr. Liu Boyu of applicant discloses a kind of electromagnetic type automobile wheel speed sensor in 200820038876.5; It is to use general a kind of wheel speed sensors at present, and its structure is as shown in Figure 1, and it is made up of shielding case 1, electrode pin 2, coil rack 3, magnetic patch 4, magnetic pole 5, coil 6, packed layer 7, output lead 8 and fixed ear base 71; Fixed ear base 71 is connected as a single entity with packed layer 7; On fixed ear base 71, have fixed orifice 72, packed layer 7 is stretched out in the lower surface of said magnetic pole 5, and electrode pin 2 is fixed on the coil rack 3; In the endoporus of coil rack 3, be placed with magnetic patch 4 and magnetic pole 5 successively; Coil 6 is wound on the coil rack 3, is provided with packed layer 7 at the outside surface of the conjunction of electrode pin 2, coil rack 3, magnetic patch 4, magnetic pole 5, coil 6, and shielding case 1 is sleeved on outside the packed layer 7; Electromagnetic type automobile wheel speed sensor is fixed on the vehicle frame 11 through fixed ear base 71; Gear ring 10 is installed on the automobile hind axle in the automotive hub 12, and 5 pairs of magnetic poles are lived gear ring 10, and have certain interval between the two.
There is the defective of following two aspects in this type electromagnetic type automobile wheel speed sensor in actual use:
First; Because automobile wheel speed sensor is to be installed on the automobile frame through fixed ear base 71, and gear ring 10 is installed on the automotive hub, though leave the gap between the two; But because automobile frame and automotive hub are under the sharp pounding that running car produces; Both elastic deformation coefficients are different, thereby make the yoke distance between magnetic core and the gear ring produce fluctuation, cause unstable properties.
The second, because the lower surface of magnetic pole 5 directly is exposed, though increase magnetic flux; When the external world did not have magnetic interference, measuring accuracy was very high, but when external magnetic field disturbs; Measuring accuracy is just not high; Stability is bad, and main cause is that shielding case exists through hole in the lower surface of magnetic pole, makes whole shielding case lose shielding action.
Summary of the invention:
The object of the present invention is to provide a kind of full-shield automobile wheel speed sensor and mounting structure thereof; It can eliminate the spacing fluctuation between magnetic pole and the gear ring; Can carry out full-shield to automobile wheel speed sensor again, improve the measuring accuracy and the stability of automobile wheel speed sensor.
The technical scheme that the present invention takes is following:
A kind of full-shield automobile wheel speed sensor comprises shielding case, electrode pin, coil rack, magnetic patch, magnetic pole, coil, packed layer and output lead, and electrode pin is fixed on the coil rack; In the endoporus of coil rack; Be placed with magnetic patch and magnetic pole from top to bottom successively, coil winding is on coil rack, and electrode pin, coil rack, magnetic patch, magnetic pole and coil are coated in the packed layer; On packed layer, extend fixed ear base; On fixed ear base, have fixed orifice, packed layer is stretched out in the lower surface of magnetic pole, on the lower surface of shielding case, is provided with and the corresponding through hole of magnetic pole; The diameter of through hole is characterized in that greater than the diameter of magnetic pole: between the lower surface of the lower end of packed layer and magnetic pole and shielding case, be provided with screened film.
Owing to have additional screened film in the lower surface of magnetic pole, can reduce the magnetic loss of magnetic pole, increased the magnetic flux between magnetic pole and gear ring, can prevent the interference of external magnetic field again to automobile wheel speed sensor, improved the measuring accuracy and the stability of automobile wheel speed sensor.
A kind of mounting structure of the present invention comprises fixed ear base, link and automotive hub, and link one end is fixedly connected with fixed ear base, and the other end is fixed on the automotive hub, and gear ring is installed on the automotive hub.
Because automobile wheel speed sensor is fixed on the automotive hub through link, and gear ring is installed on the automobile hind axle, automobile hind axle is installed in the automotive hub; So just make magnetic pole and gear ring realize synchronous vibration; Guarantee that spacing between the two is stable, make between magnetic pole and the gear ring to keep best clearance no matter produce how strong vibrations in the vehicle traveling process; Magnetic pole and the yoke distance between the gear ring in the automobile wheel speed sensor are constant all the time, and the stability of work is improved.
Description of drawings:
Fig. 1 is the structure and the scheme of installation of existing automobile sensor;
Fig. 2 is structure of the present invention and scheme of installation.
Among the figure: the 1-shielding case; The 2-electrode pin; The 3-coil rack; The 4-magnetic patch; The 5-magnetic pole; The 6-coil; The 7-packed layer; The 71-fixed ear base; The 72-fixed orifice; The 8-output lead; The 9-screened film; The 10-gear ring; The 11-vehicle frame; The 12-automotive hub; The 13-link.
Embodiment:
Specify embodiment of the present invention below in conjunction with accompanying drawing:
A kind of full-shield automobile wheel speed sensor shown in accompanying drawing 2, comprises shielding case 1, electrode pin 2, coil rack 3, magnetic patch 4, magnetic pole 5, coil 6, packed layer 7 and output lead 8; Electrode pin 2 is fixed on the coil rack 3, in the endoporus of coil rack 3, is placed with magnetic patch 4 and magnetic pole 5 from top to bottom successively; Coil 6 is wound on the coil rack 3; Electrode pin 2, coil rack 3, magnetic patch 4, magnetic pole 5, coil 6 are coated in the packed layer 7, on packed layer 7, extend fixed ear base 71, on fixed ear base 71, have fixed orifice 72; Packed layer 7 is stretched out in the lower surface of magnetic pole 5; On the lower surface of shielding case 1, be provided with and magnetic pole 5 corresponding through holes, the diameter of through hole is greater than the diameter of magnetic pole 5, between the lower surface of the lower end of magnetic pole 5 and shielding case 1, is provided with screened film 9.
A kind of mounting structure of full-shield automobile wheel speed sensor and gear ring; Comprise fixed ear base 71, link 13 and automotive hub 12 on the full-shield automobile wheel speed sensor; Link 13 1 ends are fixedly connected with fixed ear base 71; The other end is fixed on the automotive hub 12, and gear ring 10 is installed on the automotive hub 12.
Its principle of work is: because the full-shield automobile wheel speed sensor is fixed on the automotive hub 12 through link 13; Gear ring 10 is installed on the automobile hind axle; And automobile hind axle is installed in the automotive hub 12, and when gear ring 10 during with wheel, the tooth top of gear ring 10, tooth root just change apart from the distance of magnetic pole 5 bottom faces; Magnetic field intensity therebetween will change thereupon, thereby on coil 6, produces corresponding induction electromotive force.The magnetic intensity of magnetic pole 5 wherein, distance directly influences magnetic flux between magnetic pole 5 and the gear ring 10.Because the present invention exposes the bottom of magnetic pole 5; Set up screened film 9 simultaneously; It had both reduced magnetic loss, had strengthened the intensity of magnetic pole 5 relatively, can improve whole capability of electromagnetic shielding again; The interference of external magnetic field be can effectively prevent, thereby the accuracy of detection and the stability of automobile wheel speed sensor improved automobile wheel speed sensor.
Adopt mounting structure of the present invention, can guarantee to be in best clearance all the time between bottom and the gear ring 10 of magnetic pole 5, this is just for the automobile wheel speed sensor acquired signal provides a stable magnetic field environment, thus the sensitivity and the stability of raising sensor.
Claims (2)
1. full-shield automobile wheel speed sensor; Comprise shielding case (1), electrode pin (2), coil rack (3), magnetic patch (4), magnetic pole (5), coil (6), packed layer (7) and output lead (8); Electrode pin (2) is fixed on the coil rack (3), in the endoporus of coil rack (3), is placed with magnetic patch (4) and magnetic pole (5) from top to bottom successively; Coil (6) is wound on the coil rack (3); Electrode pin (2), coil rack (3), magnetic patch (4), magnetic pole (5) and coil (6) are coated in the packed layer (7), on packed layer (7), extend fixed ear base (71), on fixed ear base (71), have fixed orifice (72); Packed layer (7) is stretched out in the lower surface of magnetic pole (5); On the lower surface of shielding case (1), be provided with and the corresponding through hole of magnetic pole (5), the diameter of through hole is characterized in that greater than the diameter of magnetic pole (5): between the lower surface of the lower end of packed layer (7) and magnetic pole (5) and shielding case (1), be provided with screened film (9).
2. a kind of mounting structure of the said full-shield automobile wheel speed sensor of claim 1; It is characterized in that: comprise fixed ear base (71), link (13) and automotive hub (12); Link (13) one ends are fixedly connected with fixed ear base (71); The other end is fixed on the automotive hub (12), and gear ring (10) is installed on the automotive hub (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103012219A CN102435764A (en) | 2011-09-27 | 2011-09-27 | Full-shielding automobile wheel speed sensor and mounting structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103012219A CN102435764A (en) | 2011-09-27 | 2011-09-27 | Full-shielding automobile wheel speed sensor and mounting structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102435764A true CN102435764A (en) | 2012-05-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103012219A Pending CN102435764A (en) | 2011-09-27 | 2011-09-27 | Full-shielding automobile wheel speed sensor and mounting structure thereof |
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| Country | Link |
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| CN (1) | CN102435764A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535508A (en) * | 2018-04-01 | 2018-09-14 | 宁波依诺汽车电子有限公司 | A kind of Full-shielding automobile wheel speed sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364005A (en) * | 1979-07-19 | 1982-12-14 | Fujitsu Fanuc Limited | Brushless tachometer generator |
| CN2276636Y (en) * | 1996-11-08 | 1998-03-18 | 大连机车车辆厂 | Passive speed sensor |
| CN200986559Y (en) * | 2006-07-25 | 2007-12-05 | 刘柏榆 | Shielding structure of automobile magnetoelectric wheel speed sensor |
| CN101339199A (en) * | 2008-08-01 | 2009-01-07 | 刘柏榆 | Electromagnetic type automobile wheel speed sensor and installation method thereof |
| CN202171596U (en) * | 2011-09-27 | 2012-03-21 | 江苏金榆科技集团有限公司 | Full shielding automobile wheel speed sensor and installation structure thereof |
-
2011
- 2011-09-27 CN CN2011103012219A patent/CN102435764A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364005A (en) * | 1979-07-19 | 1982-12-14 | Fujitsu Fanuc Limited | Brushless tachometer generator |
| CN2276636Y (en) * | 1996-11-08 | 1998-03-18 | 大连机车车辆厂 | Passive speed sensor |
| CN200986559Y (en) * | 2006-07-25 | 2007-12-05 | 刘柏榆 | Shielding structure of automobile magnetoelectric wheel speed sensor |
| CN101339199A (en) * | 2008-08-01 | 2009-01-07 | 刘柏榆 | Electromagnetic type automobile wheel speed sensor and installation method thereof |
| CN202171596U (en) * | 2011-09-27 | 2012-03-21 | 江苏金榆科技集团有限公司 | Full shielding automobile wheel speed sensor and installation structure thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535508A (en) * | 2018-04-01 | 2018-09-14 | 宁波依诺汽车电子有限公司 | A kind of Full-shielding automobile wheel speed sensor |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120502 |