Sensing part, sensing unit, wheel speed sensing device and vehicle
A sensing part, a sensing unit, a wheel speed sensing device and a vehicle using said wheel speed sensing device. The vehicle comprises a vehicle wheel and the wheel speed sensing device. The wheel speed sensing device is mounted on the vehicle wheel for timely detecting a speed of the wheel. The sensing device comprises a magnetic-field generating unit and the sensing unit. The sensing unit comprises a fixed part and a sensing part detachably provided on the fixed part. A snapping slot and a snapping part, which can be elastically snapped with each other or released from each other, are provided between the sensing part and the fixed part. The sensing part comprises a housing and a sensing circuit board secured by the housing.
1. A sensing unit for a wheel speed sensing device installed on a vehicle's wheel to real-timely detect the wheel speed, wherein the sensing unit comprises:
a fixed part, wherein the fixed part comprises a body portion ( 110 ) and a sleeve ( 12 ), wherein the sleeve ( 12 ) is formed to be tightly sleeved on a screw rod ( 73 ) passing through a wheel hub ( 70 ) of the vehicle's wheel to secure the sensing unit on the screw rod ( 73 ), and wherein the body portion ( 110 ) and the sleeve ( 12 ) are formed as an integral component or are assembled together;
and a sensing part ( 2 ), wherein the sensing part comprises a housing ( 20 ) and a sensing circuit board ( 21 ) secured in the housing;
wherein a snapping part ( 202 ) is provided in one of the housing ( 20 ) and the body portion ( 110 ) and a snapping slot ( 111 ) is provided in the other of the housing ( 20 ) and the body portion ( 110 ), wherein the snapping slot ( 111 ) and the snapping part ( 202 ) can be elastically snapped into or released from each other, so that the sensing part ( 2 ) is detachably provided on the fixed part.
2. The sensing unit for the wheel speed sensing device as claimed in claim 1 , wherein one of the housing ( 20 ) and the body portion ( 110 ) is further provided with an elastic part ( 200 ) on which the snapping part ( 202 ) is provided.
3. The sensing unit for the wheel speed sensing device as claimed in claim 1 , wherein one of the housing ( 20 ) and the body portion ( 110 ) is further provided with a pressing part ( 203 ), the elastic part ( 200 ) together with the pressing part ( 203 ) is provided in said one of the housing ( 20 ) and the body portion ( 110 ), or alternatively the elastic part ( 200 ) and the snapping part ( 202 ) are provided in one of the housing ( 20 ) and the body portion ( 110 ), and the pressing part ( 203 ) is provided in the other of the housing ( 20 ) and the body portion ( 110 ).
4. The sensing unit for the wheel speed sensing device as claimed in claim 1 , wherein an installation groove ( 112 ) and an installation rib ( 204 ) matable with the installation groove is provided between the housing ( 20 ) and the body portion ( 110 ), the installation rib ( 204 ) is provided in one of the housing ( 20 ) and the body portion ( 110 ), and the installation groove ( 112 ) is provided in the other of the housing ( 20 ) and the body portion ( 110 ).
5. The sensing unit for the wheel speed sensing device as claimed in claim 4 , wherein one or more snapping slots and one or more snapping parts can be provided between the housing ( 20 ) and the body portion ( 110 ), one or more installation grooves and one or more installation ribs can be provided between the housing ( 20 ) and the body portion ( 110 ) or alternatively the installation groove and the installation rib can be dispensed with.
6. The sensing unit for the wheel speed sensing device as claimed in claim 4 , wherein the snapping slot ( 111 ) and the snapping part ( 202 ) are provided at one side between the housing ( 20 ) and the body portion ( 110 ), and the installation groove ( 112 ) and the installation rib ( 204 ) are provided at said one side or the other side between the housing ( 20 ) and the body portion ( 110 ).
7. A wheel speed sensing device installed on a wheel of a vehicle for real-timely detecting the wheel speed, the wheel having a wheel hub ( 70 ) and a screw rod ( 73 ) passing through the wheel hub, the wheel speed sensing device comprising:
a magnetic field generating unit secured on the wheel hub ( 70 ) and capable of rotating as the wheel hub rotates, wherein the magnetic field generating unit comprises a magnetic field generating part extending in a direction substantially perpendicular to or parallel to a central axis of the wheel hub; and
a sensing unit as claimed in claim 1 .
8. A vehicle, comprising:
the vehicle wheel having the wheel hub ( 70 ) and the screw rod ( 73 ) passing through the wheel hub; and
the wheel speed sensing device as claimed in claim 7 .