CN202814999U - Center shaft velocity sensing device for electric vehicles - Google Patents
Center shaft velocity sensing device for electric vehicles Download PDFInfo
- Publication number
- CN202814999U CN202814999U CN 201220388087 CN201220388087U CN202814999U CN 202814999 U CN202814999 U CN 202814999U CN 201220388087 CN201220388087 CN 201220388087 CN 201220388087 U CN201220388087 U CN 201220388087U CN 202814999 U CN202814999 U CN 202814999U
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- magnetic
- installation
- meson
- sensing device
- center shaft
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- Expired - Fee Related
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Abstract
The utility model discloses a center shaft velocity sensing device for electric vehicles. The center shaft velocity sensing device comprises a center shaft and a roller sleeved on the center shaft. The right and left sides of the roller are provided with threaded mounting terminals. Jackets are installed on the two mounting terminals at the right and left sides of the roller through internal threads, and the roller is sealed inside the jackets. The circumferential surface of the roller is provided with several magnetic meson installation sites. Magnetic mesons are fixedly installed in the magnetic meson installation sites. The jackets are equipped with Hall sensors, the installation sites of which are corresponding to the magnetic meson installation sites. By the adoption of the above structure, reliability of magnetic meson installation is guaranteed, it is not easy for positioning of the magnetic mesons, and reliability is good. As the magnetic mesons are sealed inside the jackets, the influence of the external hostile environment on the sensing device is avoided; efficiency of a magnetic field is guaranteed; and the center shaft velocity sensing device has high durability, and simultaneously is easy to disassembly and assembly and simple and convenient to install and maintain.
Description
Technical field
The utility model relates to a kind of parts of electric motor car, specifically a kind of electric vehicle axis speed sensing device.
Background technology
Electric motor car in the process of travelling, need timely Speed display with electric motor car on instrument in order to make the driver immediately know the travel speed of current electric motor car, can better control electric motor car like this.Traditional electric motor car speed sensing device all is on comprising the magnet that is arranged on the hull and being fixed on vehicle frame and the Hall element corresponding with magnet, in use be arranged on thus the variation that magnet on the hull can produce according to the foot-operated speed that rotates magnetic field, Hall element and magnet keep the distance of 2-7mm can detect changes of magnetic field and produce the Hall electronic signal, then by Hall element with the electronic signal that obtains by control system with the Speed display of electric motor car on instrument, its existing problem is:
1, magnet is arranged on the hull, produces the variation in magnetic field according to the foot-operated speed that rotates, dynamic process makes easily the magnet positioning cause the predetermined distance that departs from 2-7mm and makes inductive head can't detect signal thus, poor reliability;
2, magnet and the Hall element corresponding with magnet all are arranged on the outside, accumulate easily dust, oxidation and affect the output of magnetic field usefulness and no signal, and permanance is low.
3, magnet is installed in and must removes the dismounting of chain wheel ability, installation and maintenance difficulty on the hull.
Summary of the invention
The technical problems to be solved in the utility model provides easily electric vehicle axis speed sensing device of a kind of good reliability, permanance height, installation and maintenance.
In order to solve the problems of the technologies described above, electric vehicle axis speed sensing device of the present utility model, comprise central shaft and the beaming roller that is enclosed within on the central shaft, the left and right sides of beaming roller is provided with externally threaded installation end, and overcoat is installed in by the internal thread that arranges on two installation ends of the beaming roller left and right sides and with beaming roller and is encapsulated in the overcoat; The circumferential surface of beaming roller is provided with some magnetic mesons installation position, and the magnetic meson is installed with the magnetic meson in the installation position, puts outward and is provided with Hall element, and the installation site of Hall element is corresponding with magnetic meson installation position.
Spacing between described Hall element and the magnetic meson is 2～7mm.
Two installation ends of the described beaming roller left and right sides wherein have on the end face of an installation end to be provided with positive stop lug boss, and overcoat is installed from the installation end of opposite side, is undertaken spacing by positive stop lug boss after being in place.
After adopting said structure, owing to the circumferential surface that the magnetic meson is directly installed on beaming roller, beaming roller is outer to be encapsulated by overcoat, put outward and be provided with the Hall element corresponding with the magnetic meson, guaranteed thus the fiduciary level that the magnetic meson is installed, can not make easily the positioning of magnetic meson, good reliability; The magnetic meson is encapsulated in the overcoat, has avoided outside rugged environment on the impact of induction installation, guaranteed magnetic field usefulness, permanance is high, the while easy disassembling, and installation and maintenance are simple and convenient.
Description of drawings
Fig. 1 is that integral installation structure master of the present utility model looks synoptic diagram;
Fig. 2 is integral installation structural upright synoptic diagram of the present utility model;
Fig. 3 is that central shaft of the present utility model and beaming roller are installed perspective view.
Embodiment
Below in conjunction with the drawings and specific embodiments, electric vehicle axis speed sensing device of the present utility model is described in further detail.
As shown in the figure, electric vehicle axis speed sensing device of the present utility model, comprise central shaft 1 and the beaming roller 2 that is enclosed within on the central shaft, the left and right sides of beaming roller 2 is provided with externally threaded installation end 3, overcoat 4 is installed in by the internal thread that arranges on two installation ends of beaming roller 2 left and right sides and with beaming roller 2 and is encapsulated in the overcoat 4, two installation ends 3 of beaming roller 2 left and right sides, wherein have on the end face of an installation end and be provided with positive stop lug boss 8, overcoat 4 is installed from the installation end of opposite side, is undertaken spacing by positive stop lug boss 8 after being in place; The circumferential surface of beaming roller 2 is provided with some magnetic mesons installation position 5, be installed with magnetic meson 6 in the magnetic meson installation position 5, be provided with Hall element 7 on the overcoat 4, the installation site of Hall element 7 is corresponding with magnetic meson installation position 5, and the spacing between Hall element 7 and the magnetic meson 6 is 2～7mm.
Claims (3)
1. electric vehicle axis speed sensing device, comprise central shaft (1) and be enclosed within beaming roller (2) on the central shaft, the left and right sides of beaming roller (2) is provided with externally threaded installation end (3), and overcoat (4) is installed in by the internal thread that arranges on two installation ends of beaming roller (2) left and right sides and with beaming roller (2) and is encapsulated in the overcoat (4); It is characterized in that: the circumferential surface of described beaming roller (2) is provided with some magnetic mesons installation positions (5), be installed with magnetic meson (6) in the magnetic meson installation position (5), be provided with Hall element (7) on the described overcoat (4), the installation site of Hall element (7) is corresponding with magnetic meson installation position (5).
2. according to electric vehicle axis speed sensing device claimed in claim 1, it is characterized in that: the spacing between described Hall element (7) and the magnetic meson (6) is 2～7mm.
3. according to electric vehicle axis speed sensing device claimed in claim 1, it is characterized in that: two installation ends (3) of described beaming roller (2) left and right sides, wherein have on the end face of an installation end and be provided with positive stop lug boss (8), overcoat (4) is installed from the installation end of opposite side, is undertaken spacing by positive stop lug boss (8) after being in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388087 CN202814999U (en) | 2012-08-07 | 2012-08-07 | Center shaft velocity sensing device for electric vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388087 CN202814999U (en) | 2012-08-07 | 2012-08-07 | Center shaft velocity sensing device for electric vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202814999U true CN202814999U (en) | 2013-03-20 |
Family
ID=47873857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220388087 Expired - Fee Related CN202814999U (en) | 2012-08-07 | 2012-08-07 | Center shaft velocity sensing device for electric vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202814999U (en) |
-
2012
- 2012-08-07 CN CN 201220388087 patent/CN202814999U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150807 |
|
| EXPY | Termination of patent right or utility model |